CN101382254B - Light plate and backlight module based on the light plate - Google Patents
Light plate and backlight module based on the light plate Download PDFInfo
- Publication number
- CN101382254B CN101382254B CN200810173839XA CN200810173839A CN101382254B CN 101382254 B CN101382254 B CN 101382254B CN 200810173839X A CN200810173839X A CN 200810173839XA CN 200810173839 A CN200810173839 A CN 200810173839A CN 101382254 B CN101382254 B CN 101382254B
- Authority
- CN
- China
- Prior art keywords
- curve
- light
- guide plate
- backlight module
- exiting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention provides a light guiding plate and a backlight module which is based on the light guiding plate; the light guiding plate is provided with a light inlet surface, a light outlet surface and a bottom surface, wherein, the bottom surface faces to the light outlet surface; the light inlet surface is connected between the light outlet surface and the bottom surface; the bottom surface or the light outlet surface is provided with a plurality of light guiding units; each light guiding unit is provided with a first curved surface and a second curved surface which are connected with each other; the first curved surface and the second curved surface are concave surfaces or convex surfaces; in a profile which is vertical to the light inlet surface and passes through the first curved surface and the second curved surface, the first curved surface and the profile are crossed at the first curve; the second curved surface and the profile are crossed to a second curve; the radius of curvature of the first curve is more than that of the second curve; the light guiding plate and the backlight module can adjust the light outlet direction of the light beam by controlling the radius of curvature of the first curved surface and the second curved surface of each light guiding unit, thus improving the light outlet efficiency of the light guiding plate further; therefore, the backlight module which uses the light guiding plate has good optical utilization ratio; in another words, the backlight module can provide surface light source with high brightness.
Description
Technical field
The present invention relates to a kind of planar light source device, and a light guide plate that is particularly related to a kind of backlight module and is used for this backlight module.
Background technology
Along with the progress of plane display technique add flat display apparatus have in light weight, volume is little and advantage such as power saving, flat display apparatus is more and more universal.Common flat display apparatus has liquid crystal indicator, plasm display device (plasma display panel, PDP), organic LED display device (organic light emitting diode display, OLED display) and electrophoretic display apparatus (electrophoretic display, EPD) etc., wherein the popularity rate with liquid crystal indicator is the highest again.
Liquid crystal indicator comprises display panels (LCD panel) and backlight module, and wherein backlight module is in order to provide area source to display panels.Generally speaking, backlight module can be divided into straight-down negative (direct type) backlight module and side incident type (sidelight type) backlight module according to its light inlet mode.
Figure 1A is the synoptic diagram of known a kind of side incident type backlight module, and Figure 1B is another schematic side view of light guide plate among Figure 1A.Please refer to Figure 1A and Figure 1B, known backlit module 100 comprises a light source 110, a light guide plate 120, a reflector plate 130 and an optical sheet 140.Light guide plate 120 has an incidence surface 122, an exiting surface 124 and a bottom surface 126, and wherein exiting surface 124 is relative with bottom surface 126, and incidence surface 122 is to be connected between exiting surface 124 and the bottom surface 126.Light source 110 is to be disposed at incidence surface 122 sides, and reflector plate 130 is to be disposed at 126 belows, bottom surface, and optical sheet 140 is to be disposed at exiting surface 124 tops.In addition, exiting surface 124 is provided with a plurality of sandblast structures 125, and bottom surface 126 is provided with a plurality of V-arrangement light elements 127.
Hold above-mentionedly, the part light that light source 110 is provided (as light 112) can produce total reflection when being passed to the surperficial 127a of V-arrangement light element 127, and the beam angle of these light 112 that produce total reflections during from exiting surface 124 outgoing is less.In known backlit module 100, these light 112 that produce total reflection are the light that can be utilized.In addition, the light (as light 114) that is passed to sandblast structure 125 can produce diffusion, yet the part light (as light 115) after the diffusion can't be from exiting surface 124 outgoing, so the light extraction efficiency of known light guide plate 120 is relatively poor, this will reduce the light utilization ratio of known backlit module 100.In addition, use sandblast structure 125 can make the beam angle of light wayward, cause brightness and uniformity coefficient to be difficult for adjusting, and the exiting surface 124 of light guide plate 120 is easy to generate tangible clear zone (or bright rays) and dark space (or dark line).
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of light guide plate, to be lifted out optical efficiency.
The present invention provides a kind of backlight module in addition, so that the area source of high brightness to be provided.
For reaching above-mentioned advantage, the present invention proposes a kind of light guide plate, and it has an incidence surface, an exiting surface and a bottom surface, and wherein the bottom surface is relative with exiting surface, and incidence surface is connected between exiting surface and the bottom surface.Bottom surface or exiting surface are provided with a plurality of light elements.Each light element has a continuous first surface and one second curved surface, the first surface and second curved surface are all concave surface or are all convex surface, and in a vertical incidence surface and a section by the first surface and second curved surface, first surface section therewith meets at one first curve, and second curved surface section therewith meets at one second curve.The radius-of-curvature of first curve is greater than the radius-of-curvature of second curve.
In one embodiment of this invention, the first surface of each above-mentioned light element is to be positioned on one first reference planes of parallel incidence surface with the junction of second curved surface.
In one embodiment of this invention, the radius-of-curvature of first curve is R1, and the radius-of-curvature of second curve is R2, wherein 100 microns (micrometer)＜R1＜∞, and 100 microns＜R2＜300 microns.
In one embodiment of this invention, the angle between one second reference planes of the tangent line of any point on above-mentioned first curve and parallel bottom surface and exiting surface is between 0.1 degree is spent with 15.Angle between the tangent line of any point on second curve and second reference planes is between 10 degree and 60 degree.
In one embodiment of this invention, above-mentioned light element be evagination in the bottom surface, and in each light element, second curve is near incidence surface.In addition, first curve and second curve are all convex line.
In one embodiment of this invention, above-mentioned light element be indent in the bottom surface, and in each light element, first curve is near incidence surface.In addition, first curve and second curve are all concave.
In one embodiment of this invention, above-mentioned light element be evagination in exiting surface, and in each light element, first curve is near incidence surface.In addition, first curve and second curve are all convex line.
In one embodiment of this invention, above-mentioned light element be indent in exiting surface, and in each light element, second curve is near incidence surface.In addition, first curve and second curve are all concave.
In one embodiment of this invention, each above-mentioned light element is respectively L1 and L2 along the maximum length of a first direction and a second direction, a long axis direction of the parallel incidence surface of first direction wherein, the vertical first direction of second direction, and 1 ≦ L1/L2 ≦ ∞.
In one embodiment of this invention, above-mentioned light element is to be provided with at interval.
In one embodiment of this invention, the spacing difference between adjacent two light elements.
In one embodiment of this invention, adjacent two light elements are connected to each other.
For reaching above-mentioned advantage, the present invention proposes a kind of backlight module in addition, and it comprises a light source, an optical sheet (optical sheet) and above-mentioned light guide plate.One light source is to be disposed at by the incidence surface, and optical sheet is to be disposed at the exiting surface top.
In one embodiment of this invention, above-mentioned optical sheet comprises prismatic lens (prism sheet), diffusion sheet (diffuser sheet) or its combination.
In one embodiment of this invention, above-mentioned backlight module also comprises a reflector plate, and it is disposed at the below, bottom surface of light guide plate.
In the present invention, the light direction of the first surface by controlling each light element and the radius-of-curvature adjustable light of second curved surface, and then promote the light guide plate light extraction efficiency.Therefore, use the backlight module of this light guide plate to have better light utilization efficiency.In other words, backlight module of the present invention can provide the area source of high brightness.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Figure 1A is the synoptic diagram of known a kind of side incident type backlight module.
Figure 1B is another schematic side view of light guide plate among Figure 1A.
Fig. 2 is the diagrammatic cross-section of a kind of backlight module of one embodiment of the invention.
Fig. 3 is the schematic perspective view of light guide plate among Fig. 2.
Fig. 4 A and Fig. 4 B are the present invention's elevational schematic view of the light guide plate of two embodiment in addition.
Fig. 5 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.
Fig. 6 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.
Fig. 7 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.
Fig. 8 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.
Description of reference numerals in the above-mentioned accompanying drawing is as follows:
100,200: backlight module
110,210: light source
112,114,115,212: light
120,300,300a, 300b, 300c, 300d, 300e, 300f: light guide plate
122,310: incidence surface
124,320: exiting surface
126,330: the bottom surface
127:V shape light element
127a: surface
130,230: reflector plate
140,220: optical sheet
212: light
340,340a, 340b, 340d, 340e, 340f: light element
342,342a, 342b, 342d, 342e, 342f: first surface
343,343d, 343e, 343f: first curve
344,344a, 344b, 344d, 344e, 344f: second curved surface
345,345d, 345e, 345f: second curve
A1: first direction
A2: second direction
D1, D2, D3, D4, D5: spacing
L1, L2: length
P1: first reference planes
P2: second reference planes
θ 1, θ 2: angle
Embodiment
Fig. 2 is the diagrammatic cross-section of a kind of backlight module of one embodiment of the invention, and Fig. 3 is the schematic perspective view of light guide plate among Fig. 2.Please refer to Fig. 2 and Fig. 3, the backlight module 200 of present embodiment comprises a light source 210, an optical sheet 220 and a light guide plate 300.Light guide plate 300 has an incidence surface 310, an exiting surface 320 and a bottom surface 330, and wherein bottom surface 330 is relative with exiting surface 320, and incidence surface 310 is connected between exiting surface 320 and the bottom surface 330.Light source 210 is to be disposed at incidence surface 310 sides, and optical sheet 220 is to be disposed at exiting surface 320 tops.Optical sheet 220 for example is a prismatic lens, but not as limit.For instance, optical sheet 220 can also be a diffusion sheet, or the combination of diffusion sheet and prismatic lens.
The bottom surface 330 of light guide plate 300 is provided with a plurality of light elements 340.Each light element 340 has a continuous first surface 342 and one second curved surface 344, and in a vertical incidence surface 310 and a section by the first surface 342 and second curved surface 344, (as shown in Figure 2), the radius-of-curvature of first surface 342 is greater than the radius-of-curvature of second curved surface 344.Particularly, in vertical incidence surface 310 and section by the first surface 342 and second curved surface 344, first surface 342 section therewith meets at one first curve 343, second curved surface 344 section therewith meets at one second curve 345, the radius-of-curvature of first curve 343 for example is R1, the radius-of-curvature of second curve 345 for example is R2, wherein 100 microns＜R1＜∞, and 100 microns＜R2＜300 micron.In addition, the first surface 342 of each light element 340 is to be positioned on the one first reference planes P1 of parallel incidence surface 310 with the junction of second curved surface 344.In each light element 340, first curve 343 also is that first surface 342 is near incidence surface 310 for example near incidence surface 310.These light elements 340 for example be indent in the bottom surface 330, and first curve 343 and second curve 345 for example be all concave, also is that the first surface 342 and second curved surface 344 are all concave surface.In addition, the first surface 342 of each light element 340 and second curved surface 344 for example are respectively a cylinder.Adjacent two light elements 340 for example are connected to each other.
In the present embodiment, the angle theta 1 between the one second reference planes P2 of the tangent line of any point on first curve 343 and parallel bottom surface 330 and exiting surface 320 for example is between 0.1 degree is spent with 15.Angle theta 2 between the tangent line of any point on second curve 345 and the second reference planes P2 for example is between 10 degree and 60 degree.
Above-mentioned light source 210 can be cathode fluorescent tube (cold cathode fluorescent lamp, CCFL), light emitting diode (light emitting diode, LED) or other light sources that are suitable for.Light source 210 is in order to provide light 212 to light guide plate 300.Because each light element 340 is that indent is in the bottom surface 330, the first surface 342 and second curved surface 344 are all concave surface, and first curve 343 that radius-of-curvature is bigger (is in each light element 340 near the incidence surface 310 of light guide plate 300, first surface 342 is positioned at the left side of the first reference planes P1, and second curved surface 344 is positioned at the right of the first reference planes P1), so most light 212 can be reflexed to the exiting surface 320 of light guide plate 300 by the first surface 342 of light element 340, and from exiting surface 320 outgoing of light guide plate 300.Therefore, the light guide plate 300 of present embodiment has preferable light extraction efficiency.Beam angle when in addition, the radius-of-curvature of first curve 343 that present embodiment can be by adjusting light element 340 and second curve 345 is controlled light 212 from exiting surface 320 outgoing.Though the beam angle of light 212 during from exiting surface 320 outgoing is bigger, but the beam angle of light 212 is more consistent, so can revise the beam angle of light 212 by optical sheet 220 (as prismatic lens), the beam angle when making most light 212 from optical sheet 220 outgoing diminishes.So, the optically focused degree in the time of can significantly promoting light 212 from optical sheet 220 outgoing.In addition, because the beam angle of light 212 during from exiting surface 320 outgoing is more consistent, thus can alleviate the situation of light leak, and then promote the light utilization ratio of the backlight module 200 of present embodiment.Therefore, the backlight module 200 of present embodiment can promote the brightness and the uniformity coefficient of area source under the prerequisite that does not increase power consumption.
Above-mentioned backlight module 200 can also comprise a reflector plate 230, and it is disposed at 330 belows, bottom surface of light guide plate 300.This reflector plate 230 can be with the light 212 reflected back light guide plate 300 by light element 340, with the light utilization ratio of further lifting backlight module 200.
Though in the present embodiment, the first surface 342 of each light element 340 and second curved surface 344 are respectively cylinder, and in other embodiments, the first surface 342 and second curved surface 344 can be respectively sphere.Fig. 4 A and Fig. 4 B are the present invention's elevational schematic view of the light guide plate of two embodiment in addition.Please refer to Fig. 4 A and Fig. 4 B, light guide plate 300a, 300b are similar to the light guide plate 300 of Fig. 3, and difference is in first surface 342a, the 342b of light element 340a, the 340b of light guide plate 300a, 300b and the second curved surface 344a, 344b and is respectively sphere.In addition, similar to the aforementioned embodiment, in vertical incidence surface 310 and the section by first surface 342a, 342b and the second curved surface 344a, 344b, first surface 342a, 342b section therewith meet at one first curve, and the second curved surface 344a, 344b section therewith meet at one second curve.The radius-of-curvature of first curve is greater than the radius-of-curvature of second curve.The radius-of-curvature of first curve for example is R1, and 100 microns＜R1＜∞.The radius-of-curvature of second curve for example is R2, and 100 microns＜R2＜300 micron.In addition, the angle between the tangent line of any point on first curve and the above-mentioned second reference planes P2 for example is between 0.1 degree is spent with 15, as shown in Figure 2.Angle between the tangent line of any point on second curve and the above-mentioned second reference planes P2 for example is between 10 degree are spent with 60.
In light guide plate 300a, 300b, each light element 340a, 340b are respectively L1 and L2 along the maximum length of a first direction A1 and a second direction A2, a long axis direction of the parallel incidence surface 310 of first direction A1 wherein, the vertical first direction A1 of second direction A2, and 1 ≦ L1/L2 ≦ ∞.In more detail, when L1/L2 is littler, then the shape of light element can be similar to the light element 340a shown in Fig. 4 A.Heal greatly as L1/L2, then the shape of light element can be similar to the light element 340b shown in Fig. 4 B.In addition, the advantage of light guide plate 300a, 300b is similar to the advantage of the light guide plate of Fig. 2 300, will no longer repeat at this.In addition, the light guide plate in the backlight module 200 of Fig. 2 300 is replaceable is light guide plate 300a or light guide plate 300b.
Fig. 5 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.Please refer to Fig. 5, the light guide plate 300c of present embodiment is similar to the light guide plate of Fig. 2 300, below only describes at its difference place.In light guide plate 300, adjacent two light elements 340 are to be connected to each other, and in light guide plate 300c, light element 340 is the bottom surfaces 330 that are arranged at intervals at light guide plate 300c.In addition, the space D 1 between adjacent two light elements 340, D2, D3, D4, D5 can be different.For instance, more the spacing near incidence surface 310 is bigger, also is D1〉D2〉D3〉D4〉D5.By adjusting the outgoing light homogeneity that space D 1, D2, D3, D4, D5 between adjacent two light elements 340 can promote light guide plate 300c.
In another embodiment, the space D 1 between adjacent two light elements 340, D2, D3, D4, D5 also can be identical.In addition, in light guide plate 300c, the first surface 342 of each light element 340 and second curved surface 344 can be cylinder or sphere.In addition, the light guide plate in the backlight module 200 of Fig. 2 300 is replaceable is light guide plate 300c.
Fig. 6 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.Please refer to Fig. 6, the light element 340d of the light guide plate 300d of present embodiment is that evagination is in the bottom surface 330, and in vertical incidence surface 310 and section by the first surface 342d and the second curved surface 344d, first surface 342d section therewith meets at one first curve 343d, and second curved surface 344d section therewith meets at one second curve 345d.The first curve 343d and the second curve 345d are all convex line, and in other words, the first surface 342d and the second curved surface 344d are all convex surface.In each light element 340d, the second curve 345d also is that the second curved surface 344d is near incidence surface 310 near incidence surface 310.In addition, the radius-of-curvature of the first curve 343d is greater than the radius-of-curvature of the second curve 345d.The radius-of-curvature of the first curve 343d for example is R1, and 100 microns＜R1＜∞.The radius-of-curvature of the second curve 345d for example is R2, and 100 microns＜R2＜300 micron.In addition, the tangent line of any point on the first curve 343d and the angle theta 1 between the second reference planes P2 for example are between 0.1 degree and 15 degree.Angle theta 2 between the tangent line of any point on the second curve 345d and the second reference planes P2 for example is between 10 degree and 60 degree.
Because each light element 340d is that evagination is in the bottom surface 330, the first surface 342d and the second curved surface 344d are all convex surface, and the second less curve 345d of radius-of-curvature (is among each light element 340d near the incidence surface 310 of light guide plate 300d, first surface 342d is positioned at the right of the first reference planes P1, and the second curved surface 344d is positioned at the left side of the first reference planes P1), so most light 212 can be reflexed to the exiting surface 320 of light guide plate 300d by the first surface 342d of light element 340d, and from the exiting surface 320d outgoing of light guide plate 300d.Therefore, the light guide plate 300d of present embodiment has preferable light extraction efficiency, and can make the beam angle of light 212 more consistent.The light guide plate 300d of present embodiment has similar advantage to the light guide plate of Fig. 2 300, and the light guide plate 300 in the backlight module 200 of Fig. 2 also replaceable be light guide plate 300d.In addition, in light guide plate 300d, the first surface 342d of each light element 340d and the second curved surface 344d can be cylinder or sphere.Light element 340d also space set in the bottom surface 330.
Though light element all is arranged at the bottom surface in the various embodiments described above, in the present invention, light element also can be arranged at exiting surface, below will introduce the embodiment that light element is arranged at exiting surface.
Fig. 7 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.Please refer to Fig. 7, the light element 340e of the light guide plate 300e of present embodiment is that evagination is in exiting surface 320, and in vertical incidence surface 310 and section by the first surface 342e and the second curved surface 344e, first surface 342e section therewith meets at one first curve 343e, and second curved surface 344e section therewith meets at one second curve 345e.The first curve 343e and the second curve 345e are all convex line, and in other words, the first surface 342e and the second curved surface 344e are all convex surface.In each light element 340e, the first curve 343e is near incidence surface 310, that is first surface 342e is near incidence surface 310.In addition, the radius-of-curvature of the first curve 343e is greater than the radius-of-curvature of the second curve 345e.The radius-of-curvature of the first curve 343e for example is R1, and 100 microns＜R1＜∞.The radius-of-curvature of the second curve 345e for example is R2, and 100 microns＜R2＜300 micron.In addition, the tangent line of any point on the first curve 343e and the angle theta 1 between the second reference planes P2 for example are between 0.1 degree and 15 degree.Angle theta 2 between the tangent line of any point on the second curve 345e and the second reference planes P2 for example is between 10 degree and 60 degree.
In the present embodiment, each light element 340e be evagination in exiting surface 320, the first surface 342e and the second curved surface 344e are all convex surface, and the bigger first curve 343e of radius-of-curvature is near the incidence surface 310 of light guide plate 300e.Also be that first surface 342e is positioned at the left side of the first reference planes P1 among each light element 340e, and the second curved surface 344e is positioned at the right of the first reference planes P1.So, the most of light 212 that is passed to the second curved surface 344e can be from the second curved surface 344e outgoing, and the most of light 212 that is passed to first surface 342e can be reflected back toward bottom surface 330, afterwards again through at least once reflection and from the second curved surface 344e outgoing.
Because most light 212 can so the light guide plate 300d of present embodiment has preferable light extraction efficiency, and can make the beam angle of light 212 more consistent from the second curved surface 344e outgoing of light element 340e.The light guide plate 300e of present embodiment has similar advantage to the light guide plate of Fig. 2 300, and the light guide plate 300 in the backlight module 200 of Fig. 2 also replaceable be light guide plate 300e.In addition, in light guide plate 300e, the first surface 342e of each light element 340e and the second curved surface 344e can be cylinder or sphere.Light element 340e also space set in exiting surface 320.
Fig. 8 is the diagrammatic cross-section of a kind of light guide plate of another embodiment of the present invention.Please refer to Fig. 8, the light element 340f of the light guide plate 300f of present embodiment is that indent is in exiting surface 320, and in vertical incidence surface 310 and section by the first surface 342f and the second curved surface 344f, first surface 342f section therewith meets at one first curve 343f, and second curved surface 344f section therewith meets at one second curve 345f.The first curve 343f and the second curved surface 345f are all concave, and in other words, the first surface 342f and the second curved surface 344f are all concave surface.In each light element 340f, the second curve 345f also is that the second curved surface 344f is near incidence surface 310 near incidence surface 310.In addition, the radius-of-curvature of the first curve 343f is greater than the radius-of-curvature of the second curve 345f.The radius-of-curvature of the first curve 343f for example is R1, and 100 microns＜R1＜∞.The radius-of-curvature of the second curve 345f for example is R2, and 100 microns＜R2＜300 micron.In addition, the tangent line of any point on the first curve 343f and the angle theta 1 between the second reference planes P2 for example are between 0.1 degree and 15 degree.Angle theta 2 between the tangent line of any point on the second curve 345f and the second reference planes P2 for example is between 10 degree and 60 degree.
In the present embodiment, each light element 340f be indent in exiting surface 320, the first surface 342f and the second curved surface 344f are all concave surface, and the less second curve 343f of radius-of-curvature is near the incidence surface 310 of light guide plate 300f.In other words, among each light element 340f, first surface 342f is positioned at the right of the first reference planes P1, and the second curved surface 344f is positioned at the left side of the first reference planes P1.So, the most of light 212 that is passed to the second curved surface 344f can be from the second curved surface 344f outgoing, and the most of light 212 that is passed to first surface 342f can be reflected back toward bottom surface 330, afterwards again through at least once reflection and from the second curved surface 344f outgoing.
Because most light 212 can so the light guide plate 300f of present embodiment has preferable light extraction efficiency, and can make the beam angle of light 212 more consistent from the second curved surface 344f outgoing of light element 340f.The light guide plate 300f of present embodiment has similar advantage to the light guide plate of Fig. 2 300, and the light guide plate 300 in the backlight module 200 of Fig. 2 also replaceable be light guide plate 300f.In addition, in light guide plate 300f, the first surface 342f of each light element 340f and the second curved surface 344f can be cylinder or sphere.Light element 340f also space set in exiting surface 320.
In sum, each light element of light guide plate of the present invention has the first surface and second curved surface, the light direction of the first surface by controlling each light element and the radius-of-curvature may command light of second curved surface is to promote the light guide plate light extraction efficiency and to make the beam angle of light more consistent.In addition, owing to light guide plate of the present invention has higher light-emitting efficiency and can make the beam angle of light more consistent, so use the backlight module of this light guide plate to have better light utilization efficiency.So, backlight module of the present invention can provide the area source of high brightness and high evenness under the situation that does not increase power consumption.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; the ordinary technical staff in the technical field of the invention; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the scope that claim defined.
Claims (40)
1. light guide plate, has an incidence surface, one exiting surface and a bottom surface, this bottom surface is relative with this exiting surface, and this incidence surface is connected between this exiting surface and this bottom surface, this bottom surface or this exiting surface are provided with a plurality of light elements, each light element has a continuous first surface and one second curved surface, this first surface and this second curved surface are all concave surface or are all convex surface, this first surface and this second curved surface are cylinder, at vertical this incidence surface, vertically be provided with this bottom surface of described a plurality of light elements or be provided with in this exiting surface and a section of described a plurality of light elements by this first surface and this second curved surface, this first surface and this section meet at one first curve, this second curved surface and this section meet at one second curve, the radius-of-curvature of this first curve is R1, and 100 microns＜R1＜∞, the radius-of-curvature of this second curve is R2, and 100 microns＜R2＜300 micron, the radius-of-curvature of this first curve is greater than the radius-of-curvature of this second curve
Wherein the angle between one second reference planes of the tangent line of any point on this first curve and parallel this bottom surface and this exiting surface is between between 0.1 degree and 15 degree, the angle between the tangent line of any point on this second curve and this second reference planes between 10 spend and 60 spend between.
2. light guide plate as claimed in claim 1, wherein this first surface of each light element is positioned on one first reference planes of parallel this incidence surface with the junction of this second curved surface.
3. light guide plate as claimed in claim 1, wherein those light elements be evagination in this bottom surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all convex line.
4. light guide plate as claimed in claim 1, wherein those light elements be indent in this bottom surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all concave.
5. light guide plate as claimed in claim 1, wherein those light elements be evagination in this exiting surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all convex line.
6. light guide plate as claimed in claim 1, wherein those light elements be indent in this exiting surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all concave.
7. light guide plate as claimed in claim 1, wherein said a plurality of light elements are to be provided with at interval.
8. light guide plate as claimed in claim 7, the spacing difference between wherein adjacent two light elements.
9. light guide plate as claimed in claim 1, wherein adjacent two light elements are connected to each other.
10. light guide plate, has an incidence surface, one exiting surface and a bottom surface, this bottom surface is relative with this exiting surface, and this incidence surface is connected between this exiting surface and this bottom surface, this bottom surface or this exiting surface are provided with a plurality of light elements, each light element has a continuous first surface and one second curved surface, this first surface and this second curved surface are all concave surface or are all convex surface, this first surface and this second curved surface are sphere, at vertical this incidence surface, vertically be provided with this bottom surface of described a plurality of light elements or be provided with in this exiting surface and a section of described a plurality of light elements by this first surface and this second curved surface, this first surface and this section meet at one first curve, this second curved surface and this section meet at one second curve, the radius-of-curvature of this first curve is R1, and 100 microns＜R1＜∞, the radius-of-curvature of this second curve is R2, and 100 microns＜R2＜300 micron, the radius-of-curvature of this first curve is greater than the radius-of-curvature of this second curve
Wherein the angle between one second reference planes of the tangent line of any point on this first curve and parallel this bottom surface and this exiting surface is between 0.1 degree is spent with 15, angle between the tangent line of any point on this second curve and this second reference planes is between 10 degree and 60 degree, wherein each light element is respectively L1 and L2 along the maximum length of a first direction and a second direction, one long axis direction of parallel this incidence surface of this first direction, vertical this first direction of this second direction, and 1≤L1/L2＜∞.
11. light guide plate as claimed in claim 10, wherein this first surface of each light element is positioned on one first reference planes of parallel this incidence surface with the junction of this second curved surface.
12. light guide plate as claimed in claim 10, wherein those light elements be evagination in this bottom surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all convex line.
13. light guide plate as claimed in claim 10, wherein those light elements be indent in this bottom surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all concave.
14. light guide plate as claimed in claim 10, wherein those light elements be evagination in this exiting surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all convex line.
15. light guide plate as claimed in claim 10, wherein those light elements be indent in this exiting surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all concave.
16. light guide plate as claimed in claim 10, wherein said a plurality of light elements are to be provided with at interval.
17. light guide plate as claimed in claim 16, the spacing difference between wherein adjacent two light elements.
18. light guide plate as claimed in claim 10, wherein adjacent two light elements are connected to each other.
19. a backlight module comprises:
One light guide plate, has an incidence surface, one exiting surface and a bottom surface, this bottom surface is relative with this exiting surface, and this incidence surface is connected between this exiting surface and this bottom surface, this bottom surface or this exiting surface are provided with a plurality of light elements, each light element has a continuous first surface and one second curved surface, this first surface and this second curved surface are all concave surface or are all convex surface, this first surface and this second curved surface are cylinder, and at vertical this incidence surface, vertically be provided with this bottom surface of described a plurality of light elements or be provided with in this exiting surface and a section of described a plurality of light elements by this first surface and this second curved surface, this first surface and this section meet at one first curve, this second curved surface and this section meet at one second curve, the radius-of-curvature of this first curve is R1, and 100 microns＜R1＜∞, the radius-of-curvature of this second curve is R2, and 100 microns＜R2＜300 micron, and the radius-of-curvature of this first curve is greater than the radius-of-curvature of this second curve;
One light source is disposed at by this incidence surface;
One optical sheet is disposed at this exiting surface top,
Wherein the angle between one second reference planes of the tangent line of any point on this first curve and parallel this bottom surface and this exiting surface is between between 0.1 degree and 15 degree, the angle between the tangent line of any point on this second curve and this second reference planes between 10 spend and 60 spend between.
20. backlight module as claimed in claim 19, wherein this first surface of each light element is positioned on one first reference planes of parallel this incidence surface with the junction of this second curved surface.
21. backlight module as claimed in claim 19, wherein said a plurality of light elements be evagination in this bottom surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all convex line.
22. backlight module as claimed in claim 19, wherein said a plurality of light elements be indent in this bottom surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all concave.
23. backlight module as claimed in claim 19, wherein said a plurality of light elements be evagination in this exiting surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all convex line.
24. backlight module as claimed in claim 19, wherein said a plurality of light elements be indent in this exiting surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all concave.
25. backlight module as claimed in claim 19, wherein said a plurality of light elements are to be provided with at interval.
26. backlight module as claimed in claim 25, the spacing difference between wherein adjacent two light elements.
27. backlight module as claimed in claim 19, wherein adjacent two light elements are connected to each other.
28. backlight module as claimed in claim 19, wherein this optical sheet comprises prismatic lens, diffusion sheet or its combination.
29. backlight module as claimed in claim 19 also comprises a reflector plate, is disposed at this below, bottom surface of this light guide plate.
30. a backlight module comprises:
One light guide plate, has an incidence surface, one exiting surface and a bottom surface, this bottom surface is relative with this exiting surface, and this incidence surface is connected between this exiting surface and this bottom surface, this bottom surface or this exiting surface are provided with a plurality of light elements, each light element has a continuous first surface and one second curved surface, this first surface and this second curved surface are all concave surface or are all convex surface, this first surface and this second curved surface are sphere, and at vertical this incidence surface, vertically be provided with this bottom surface of described a plurality of light elements or be provided with in this exiting surface and a section of described a plurality of light elements by this first surface and this second curved surface, this first surface and this section meet at one first curve, this second curved surface and this section meet at one second curve, the radius-of-curvature of this first curve is R1, and 100 microns＜R1＜∞, the radius-of-curvature of this second curve is R2, and 100 microns＜R2＜300 micron, and the radius-of-curvature of this first curve is greater than the radius-of-curvature of this second curve;
One light source is disposed at by this incidence surface;
One optical sheet is disposed at this exiting surface top,
Wherein the angle between one second reference planes of the tangent line of any point on this first curve and parallel this bottom surface and this exiting surface is between 0.1 degree is spent with 15, angle between the tangent line of any point on this second curve and this second reference planes is between 10 degree and 60 degree, wherein each light element is respectively L1 and L2 along the maximum length of a first direction and a second direction, one long axis direction of parallel this incidence surface of this first direction, vertical this first direction of this second direction, and 1≤L1/L2＜∞.
31. backlight module as claimed in claim 30, wherein this first surface of each light element is positioned on one first reference planes of parallel this incidence surface with the junction of this second curved surface.
32. backlight module as claimed in claim 30, wherein said a plurality of light elements be evagination in this bottom surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all convex line.
33. backlight module as claimed in claim 30, wherein said a plurality of light elements be indent in this bottom surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all concave.
34. backlight module as claimed in claim 30, wherein said a plurality of light elements be evagination in this exiting surface, and in each light element, this first curve is near this incidence surface, this first curve and this second curve are all convex line.
35. backlight module as claimed in claim 30, wherein said a plurality of light elements be indent in this exiting surface, and in each light element, this second curve is near this incidence surface, this first curve and this second curve are all concave.
36. backlight module as claimed in claim 30, wherein said a plurality of light elements are to be provided with at interval.
37. backlight module as claimed in claim 36, the spacing difference between wherein adjacent two light elements.
38. backlight module as claimed in claim 30, wherein adjacent two light elements are connected to each other.
39. backlight module as claimed in claim 30, wherein this optical sheet comprises prismatic lens, diffusion sheet or its combination.
40. backlight module as claimed in claim 30 also comprises a reflector plate, is disposed at this below, bottom surface of this light guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810173839XA CN101382254B (en) | 2008-10-29 | 2008-10-29 | Light plate and backlight module based on the light plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810173839XA CN101382254B (en) | 2008-10-29 | 2008-10-29 | Light plate and backlight module based on the light plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101382254A CN101382254A (en) | 2009-03-11 |
| CN101382254B true CN101382254B (en) | 2011-11-09 |
Family
ID=40462230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810173839XA Active CN101382254B (en) | 2008-10-29 | 2008-10-29 | Light plate and backlight module based on the light plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101382254B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155711A (en) * | 2010-02-12 | 2011-08-17 | 中强光电股份有限公司 | Optical sheet |
| TWI408046B (en) | 2010-12-28 | 2013-09-11 | Au Optronics Corp | Backlight module, light guiding devices, and method for manufacturing light guide plate |
| KR101830718B1 (en) * | 2011-07-15 | 2018-02-22 | 엘지이노텍 주식회사 | display apparatus |
| CN105807360B (en) * | 2014-12-29 | 2019-02-26 | 中强光电股份有限公司 | Light guide plate and light source module |
| CN107448909B (en) * | 2016-05-31 | 2019-10-15 | 瑞仪光电(苏州)有限公司 | Backlight module |
| US10215904B2 (en) | 2016-05-31 | 2019-02-26 | Radiant Opto-Electronics (Suzhou) Co., Ltd. | Backlight module and display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126882A (en) * | 1987-11-12 | 1992-06-30 | Mitsubishi Rayon Co., Ltd. | Plane light source unit |
| EP1348994A1 (en) * | 2000-12-13 | 2003-10-01 | Mitsubishi Rayon Co., Ltd. | Light source device |
| CN1538220A (en) * | 2003-04-18 | 2004-10-20 | 三星电机株式会社 | Light unit for display device |
-
2008
- 2008-10-29 CN CN200810173839XA patent/CN101382254B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5126882A (en) * | 1987-11-12 | 1992-06-30 | Mitsubishi Rayon Co., Ltd. | Plane light source unit |
| EP1348994A1 (en) * | 2000-12-13 | 2003-10-01 | Mitsubishi Rayon Co., Ltd. | Light source device |
| CN1538220A (en) * | 2003-04-18 | 2004-10-20 | 三星电机株式会社 | Light unit for display device |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2002-245824A 2002.08.30 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101382254A (en) | 2009-03-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100370329C (en) | Light conducting plate and back light module | |
| CN100445827C (en) | Light-conducting board and backlight mould set | |
| CN101684927B (en) | High-collimation face type light source module and light output method thereof | |
| CN101382254B (en) | Light plate and backlight module based on the light plate | |
| US7967493B2 (en) | Light guide plate and backlight module using the same | |
| CN2862089Y (en) | Light conducting board and back light module unit | |
| CN101738649B (en) | Composite optical film structure with multiple coatings | |
| US20050281052A1 (en) | Light guide plate having V-cut grooves and a liquid crystal display using the same | |
| CN102767751B (en) | Backlight module and display device including backlight module | |
| US20110069249A1 (en) | Backlight module and liquid crystal display apparatus | |
| CN100454101C (en) | Light-guide plate | |
| CN101349397A (en) | Backlight system and microstructure reflector plate | |
| CN101865382A (en) | Structure and method thereof for luminenscence homogenization of backlight module | |
| CN102506361A (en) | LED backlight module | |
| CN101706081B (en) | Light-focusing module and backlight module | |
| TWI378299B (en) | Light module with high collimation emitting property | |
| CN1266411C (en) | Light board device | |
| KR100977272B1 (en) | Light panel with light diffusion particles | |
| CN201803318U (en) | Light guide plate, back light module, and display device employing back light module | |
| CN201237102Y (en) | Side light type back light module unit | |
| CN102901055A (en) | Light guide plate and backlight module using same | |
| CN100437291C (en) | Backlight module assembly | |
| KR20120122642A (en) | Reflective light source type light guide system of sidelight type backlight unit | |
| CN205750200U (en) | A kind of high rigidity electromagnetic shielding brightness enhancement film | |
| US20100254159A1 (en) | Brightness enhancement film and backlight module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |