CN100559242C - The backlight assembly of liquid crystal indicator and use the liquid crystal indicator of this backlight assembly - Google Patents
The backlight assembly of liquid crystal indicator and use the liquid crystal indicator of this backlight assembly Download PDFInfo
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- CN100559242C CN100559242C CNB2006100850815A CN200610085081A CN100559242C CN 100559242 C CN100559242 C CN 100559242C CN B2006100850815 A CNB2006100850815 A CN B2006100850815A CN 200610085081 A CN200610085081 A CN 200610085081A CN 100559242 C CN100559242 C CN 100559242C
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
- H01L33/504—Elements with two or more wavelength conversion materials
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Abstract
The backlight assembly of liquid crystal indicator and use the liquid crystal indicator of this backlight assembly.A kind of backlight assembly that is used for liquid crystal indicator, a plurality of light emitting diodes that it comprises underframe with inside surface, be arranged in a plurality of printed circuit board (PCB)s on the inside surface and adopt a plurality of rectangle clump forms on each of described a plurality of printed circuit board (PCB)s, each clump in described a plurality of light emitting diode clumps all comprises 4 light emitting diodes.
Description
Technical field
The present invention relates to a kind of backlight assembly, more specifically, relate to a kind of liquid crystal indicator that is used for the backlight assembly of liquid crystal indicator and uses this backlight assembly.Although the present invention is applicable to very wide range of application, it is particularly useful for wherein with the structure of light emitting diode (LED) as the light source in the backlight assembly.
Background technology
Usually, display device is depicted information as visual image.Along with development of Communication Technique, to the demand growth of the display device of compactness.This display device can be categorized into emissive type or non-light emitting-type.Liquid crystal display (LCD) device is the representative of non-light emitting display.
Because the LCD device is not a self-luminous display device, so the LCD device needs external light source.Therefore, be provided with backlight assembly at the back side of LCD device with fluorescent light.Backlight assembly light shines in the liquid crystal board of LCD device, makes that the LCD device can the display of visually image.Backlight assembly comprises a light source, as cold-cathode fluorescence lamp (CCFL), external electrode fluorescent lamp (EEFL) and/or LED.In these light sources, LED has little, the low in energy consumption and stable properties of size.Therefore, LED is widely used as the light source in LCD device backlight gradually.
Fig. 1 is according to the use LED of the prior art exploded perspective view as the LCD device of light source.As shown in Figure 1, this LCD device comprises liquid crystal board 10, backlight assembly 20, main frame 40, underframe 50 and top frame 60.Liquid crystal board 10 comprises: face with each other and be inserted with the first and second substrate (not shown) of liquid crystal layer (not shown) and the printed circuit board (PCB) adjacent with the edge of liquid crystal board 10 (PCB) 16 therebetween.Main frame 40 surrounds a plurality of limits of liquid crystal board 10 and backlight assembly 20.Underframe 50 covers the back side of backlight assembly 20, and can join main frame 40 to.Top frame 60 surrounds the edge of liquid crystal board 10, and can join main frame 40 to.
Backlight assembly 20 comprises a plurality of metal-core printed circuit board (MCPCB) 22, a plurality of LED 24, reflector plate 26, transparency window 30 and a plurality of optical sheet 32.Described a plurality of MCPCB 22 apart turning up the soil are arranged on the inside surface of underframe 50.On each MCPCB 22, be furnished with a plurality of LED24.Reflector plate 26 has corresponding respectively a plurality of through holes 28 with described a plurality of LED 24.Reflector plate 26 is white in color or silver color.Reflector plate 26 covers the inside surface of described a plurality of MCPCB 22 and underframe 50, makes described a plurality of LED 24 pass described a plurality of through hole 28 respectively and stretches out.Transparency window 30 has corresponding respectively a plurality of decollators (diverter) 31 with described a plurality of LED 24.Described a plurality of optical sheet 32 can comprise the optical sheet of prismatic lens, diffusion sheet and other types.Transparency window 30 and described a plurality of optical sheet 32 sequentially are arranged in the top of reflector plate 26.
Fig. 2 is an illustration according to the tactic synoptic diagram of the LED string of a plurality of green, red, the blue and green LED of prior art.As shown in Figure 2, on each MCPCB 22, be arranged with a plurality of LED strings 24.Described a plurality of MCPCB 22 is arranged on the inside surface of underframe (Fig. 1 50) by apart the turning up the soil of the spacing of about 60mm.Each LED string 24 all comprises 4 LED, and wherein the first and the 4th LED is green LED 24a and 24d, and the 2nd LED is red LED 24b, and the 3rd LED is blue LED 24c.Described a plurality of LED string 24 on each MCPCB 22 is launched light in liquid crystal board (Fig. 1 10), and has the length l of about 40mm
1Yet in the time will being respectively green, red, blue and green 4 LED 24a, 24b, 24c and 24d as the LED string in the backlight assembly (Fig. 1 20), the luminance shortage of red red LED 24b is to go up and to reproduce correct color at liquid crystal board (Fig. 1 10).
Fig. 3 is an illustration according to the tactic synoptic diagram of a plurality of LED strings of the red, green, blue of prior art, green and red LED.As shown in Figure 3, will be on a plurality of MCPCB 22 tactic a plurality of LED strings 25 are as the light source of backlight assembly (Fig. 1 20), with the problem of the luminance shortage that solves red LED 25b.Each LED string all has 5 LED, and wherein the second and the 4th LED is green LED 25a and 25d, and the first and the 5th LED is red LED 25b and 25e, and the 3rd LED is blue LED 25c.On each MCPCB 22, be arranged with a plurality of LED strings 25.Described a plurality of MCPCB 22 is apart to turn up the soil and is arranged on the inside surface of underframe (Fig. 1 50).
The schematic isometric of a plurality of LED strings of field sequence control method that Fig. 4 is an illustration according to the utilization of prior art.As shown in Figure 4, by simultaneously a plurality of LED strings 25 being carried out gating and with red, green, blue, green and red mixing, produce white light.Can utilize field sequence control (FSC) simultaneously described a plurality of LED strings 25 to be carried out gating.When utilizing FSC, go up the no moving image that shown at liquid crystal board (Fig. 1 10) image blurringly.
When a plurality of LED strings 24 or 25 that will have 4 or 5 LED were arranged on the MCPCB, the spacing between the adjacent LED on the MCPCB was very near.These LED ovalizes are to mix and the generation white light.LCD device existing problems according to prior art.For example, near spacing causes the hot polymerization collection that forms among these LED.If heat is not dissipated from these LED, the heat of sending in each from these LED can reduce the term of life of these LED so.Therefore, can have short life according to a plurality of LED of the use of prior art as the LCD device of light source.Owing to need the combination of a plurality of LED strings to produce white light, therefore can not carry out the segmentation gating to improve contrast in the described a plurality of LED strings 24 or 25 on described a plurality of MCPCB22 each.Owing to can not carry out segmentation control, therefore may have low contrast as the LCD device of light source according to a plurality of LED of the use of prior art to the string of a plurality of LED on a plurality of MCPCB.
Summary of the invention
Therefore, the present invention aims to provide a kind of backlight assembly that is used for liquid crystal indicator and uses the liquid crystal indicator of this backlight assembly, and it has overcome the one or more problems that cause owing to the limitation of prior art and shortcoming basically.
An object of the present invention is to provide a kind of liquid crystal indicator that is used for the backlight assembly of liquid crystal indicator and uses this backlight assembly, to improve brightness.
Another object of the present invention provides a kind of liquid crystal indicator that is used for the backlight assembly of liquid crystal indicator and uses this backlight assembly, to improve contrast.
An object of the present invention is to provide a kind of liquid crystal indicator that is used for the backlight assembly of liquid crystal indicator and uses this backlight assembly, shorten to prevent term of life.
To set forth other features and advantages of the present invention in the following description, it partly can be obvious according to explanation, perhaps can be by practice of the present invention is known.By the structure of specifically noting in following explanation and claim and the accompanying drawing, can realize and obtain these purposes of the present invention and other advantage
In order to realize these and other advantages and according to purpose of the present invention, as in this specific implementation and broadly described, a kind of backlight assembly that is used for liquid crystal indicator comprises: the underframe with inside surface; Be positioned at a plurality of printed circuit board (PCB)s on the described inside surface; And a plurality of light emitting diodes of a plurality of rectangle clump of the employing form in described a plurality of printed circuit board (PCB)s each, each clump in described a plurality of light emitting diode clumps all comprises 4 light emitting diodes.
In another aspect of this invention, a kind of backlight assembly that is used for liquid crystal indicator comprises: the underframe with inside surface; Be positioned at the printed circuit board (PCB) on the described inside surface; And be positioned at a plurality of light emitting diode clumps (cluster) on the described printed circuit board (PCB), each clump in described a plurality of light emitting diode clump all comprises 5 light emitting diodes, 4 light emitting diodes in wherein said 5 light emitting diodes are arranged in rectangle, and a light emitting diode in described 5 light emitting diodes is positioned at the center of described rectangle.
In another aspect of this invention, a kind of liquid crystal indicator has backlight assembly, and this backlight assembly comprises: the underframe with inside surface; Be positioned at a plurality of printed circuit board (PCB)s on the described inside surface; Adopt a plurality of light emitting diodes of a plurality of rectangle clump forms in described a plurality of printed circuit board (PCB)s each, each clump in described a plurality of light emitting diode clumps all comprises 4 light emitting diodes; Reflector plate has and the corresponding a plurality of through holes of described a plurality of light emitting diodes, and described reflector plate covers the described inside surface of described printed circuit board (PCB) and described underframe; Be positioned at the transparency window on the described reflector plate, described transparency window have with described a plurality of light emitting diode clumps in the corresponding a plurality of decollators of described 4 light emitting diodes of each clump; And being positioned at a plurality of optical sheets on the described transparency window, described liquid crystal indicator also has: be positioned at the liquid crystal board on described a plurality of optical sheet; Surround the main frame of described backlight assembly and described liquid crystal board; And the top frame that surrounds the edge, front of described liquid crystal board.
In another aspect of this invention, a kind of liquid crystal indicator has backlight assembly, and this backlight assembly comprises: the underframe with inside surface; Be positioned at a plurality of printed circuit board (PCB)s on the described inside surface; Adopt a plurality of light emitting diodes of a plurality of rectangle clump forms in described a plurality of printed circuit board (PCB)s each, each clump in described a plurality of light emitting diode clump all comprises 5 light emitting diodes arranging with rectangular shape, and a light emitting diode in described 5 light emitting diodes is positioned at the center of described rectangle; Reflector plate has and the corresponding a plurality of through holes of described a plurality of light emitting diodes, and described reflector plate covers the described inside surface of described printed circuit board (PCB) and described underframe; Be positioned at the transparency window on the described reflector plate, described transparency window have with described a plurality of light emitting diode clumps in the corresponding a plurality of decollators of described 4 light emitting diodes of each clump; And being positioned at a plurality of optical sheets on the described transparency window, described liquid crystal indicator also has: be positioned at the liquid crystal board on described a plurality of optical sheet; Surround the main frame of described backlight assembly and described liquid crystal board; And the top frame that surrounds the edge, front of described liquid crystal board.
Should be understood that above general describe and following detailed description all is exemplary and explanat of the present invention, aim to provide of the present invention the further specifying to as claimed in claim.
Description of drawings
Accompanying drawing is included so that further understanding of the invention to be provided, and accompanying drawing is merged in and constitutes the part of instructions, illustration a plurality of embodiment of the present invention, and be used from instructions one and explain principle of the present invention.
Fig. 1 is according to the use LED of the prior art exploded perspective view as the LCD device of light source.
Fig. 2 is an illustration according to the tactic synoptic diagram of a plurality of LED strings of green, red, the blue and green LED of prior art.
Fig. 3 is an illustration according to the tactic synoptic diagram of a plurality of LED strings of the red, green, blue of prior art, green and red LED.
The schematic isometric of a plurality of LED strings of field sequence control method that Fig. 4 is an illustration according to the utilization of prior art.
Fig. 5 be according to the present invention first exemplary embodiment in backlight, use the exploded perspective view of a plurality of LED as the LCD device of light source.
Fig. 6 is the schematic isometric of arrangement of a plurality of LED clumps of first exemplary embodiment according to the present invention.
Fig. 7 be according to the present invention second exemplary embodiment in backlight, use the exploded perspective view of a plurality of LED as the LCD device of light source.
Fig. 8 is the schematic isometric of arrangement of a plurality of LED clumps of second exemplary embodiment according to the present invention.
Fig. 9 is the schematic isometric of arrangement of a plurality of LED clumps of the 3rd exemplary embodiment according to the present invention.
Figure 10 is the schematic isometric of arrangement of a plurality of LED clumps of the 4th exemplary embodiment according to the present invention.
Figure 11 is the schematic isometric of arrangement of a plurality of LED clumps of the 5th exemplary embodiment according to the present invention.
Embodiment
To describe a plurality of preferred embodiments in detail below, its example illustrates in the accompanying drawings.
Fig. 5 be according to the present invention first exemplary embodiment in backlight, use the exploded perspective view of a plurality of LED as the LCD device of light source.As shown in Figure 5, this LCD device comprises liquid crystal board 110, backlight assembly 120, main frame 140, underframe 150 and top frame 160.Liquid crystal board 110 comprises the first and second substrate (not shown) that face with each other, be inserted in liquid crystal layer (not shown) between first substrate and second substrate and the PCB 116 adjacent with the edge of liquid crystal board 110.Main frame 140 surrounds a plurality of limits of liquid crystal board 110 and backlight assembly 120.Underframe 150 covers the back side of backlight assembly 120, and can join main frame 140 to.Top frame 160 surrounds the edge of liquid crystal board 110, and can join main frame 140 to.
Fig. 6 is the schematic isometric of arrangement of a plurality of LED clumps of first exemplary embodiment according to the present invention.As shown in Figure 6, be arranged with a plurality of LED clumps 127 respectively on each in a MCPCB 122a, the 2nd MCPCB 122b and the 3rd MCPCB 122c.Each clump in described a plurality of LED clump 127 all comprises 4 LED, and they are 2 green LED 124a and 124c, blue LED 124b and red LED 124d.These 4 LED 124a, 124b, 124c and 124d are arranged in diamond.Each apart opening among these 4 LED 124a, 124b, 124c and 124d makes among these 4 LED 124a, 124b, 124c and 124d each not be subjected to the influence of the heat sent from other LED.When described a plurality of LED 124 are top light emitting-type LED, in the horizontal and vertical directions all by the length l of about 20-50mm
2Arrange described a plurality of LED clump 127.When described a plurality of LED 124 are side light emitting-type LED, in the horizontal and vertical directions all by the length l of about 40-200mm
2Arrange described a plurality of LED clump 127.By making, produce white light from the light mixing of LED clump 127 emissions with described 4 LED 124a, 124b, 124c and 124d of arranging by diamond pattern.Because green LED has BELAND LED or the low luminous efficiency of red LED, so each LED clump 127 all has 2 green LED 124a and 124c, blue LED 124b and red LED 124d, thereby green, blue and red have identical brightness respectively.
As mentioned above, be arranged with a plurality of LED clumps 127 on each in MCPCB 122a, 122b and 122c respectively.Each Cong Jun in described a plurality of LED clump 127 is diamond pattern.In two adjacent MCPCB (for example a MCPCB 122a and the 2nd MCPCB 122b), red LED 124d relative to each other is opposite with the relative arrangement of blue LED 124b in opposing L ED clump 127.In other words, each LED clump 127 of the one MCPCB 122a and the 3rd MCPCB 122c has the clockwise arrangement by green LED 124a, blue LED 124b, green LED 124c and red LED 124d, and a plurality of LED clumps 127 of the 2nd MCPCB 122b have the clockwise arrangement by green LED 124a, red LED 124d, green LED 124c and blue LED 124b.This arrangement has prevented that a plurality of red LED are arranged in delegation.If a plurality of red LED are arranged in delegation, then on liquid crystal board (Fig. 5 110) red line can appear.
Because described a plurality of LED clump is adopted rectangular shape, therefore each clump in described a plurality of LED clumps 127 all produces white light.In other words, single led clump 127 can produce white light.Thus, can carry out the segmentation gating, to produce white light to described a plurality of LED clumps 127.Therefore, can carry out segmentation control to the brightness of liquid crystal board (Fig. 5 110).In addition, can by a plurality of LED clumps of making in the regional back of the dark image of demonstration of liquid crystal board by and make a plurality of LED clump conducting in the regional back of the bright image of demonstration of liquid crystal board, improve contrast.
It is big that spacing between two adjacent LED 124 in the LED clump of the gap ratio prior art between two adjacent LED 124 in the LED clump 127A is wanted.In addition, the spacing between two adjacent LED clumps on the MCPCB 122 is the twice of the spacing between LED clump 127 interior two adjacent LED 124 at least.Owing to compare with the spacing between the adjacent LED of the prior art, press bigger spacing away from other LED according to the LED in the backlight assembly of first embodiment of the invention, therefore solved the problem that reduces the term of life of LED owing to the heat of sending from other LED.
Fig. 7 be according to the present invention second exemplary embodiment in backlight, use the exploded perspective view of a plurality of LED as the LCD device of light source, and Fig. 8 is the schematic isometric of arrangement of a plurality of LED clumps of second exemplary embodiment according to the present invention.As shown in Figure 7, this LCD device comprises liquid crystal board 210, backlight assembly 220, main frame 240, underframe 250 and top frame 260.Backlight assembly 220 comprises a plurality of MCPCB 222, a plurality of LED clump 227, reflector plate 226, transparency window 230 and a plurality of optical sheet 232.
Described a plurality of MCPCB 222 apart turning up the soil are arranged on the inside surface of underframe 250.Each of described a plurality of MCPCB 222 is provided with a plurality of LED clumps 227.Each clump in described a plurality of LED clump 227 all comprises 5 LED 224.Reflector plate 226 have with described a plurality of LED clumps 227 in described 5 LED 224 corresponding a plurality of through holes 228 of each clump.Reflector plate 226 can be white in color or silver color.Reflector plate 226 covers the inside surface of described a plurality of MCPCB 222 and underframe 250, makes 5 LED 224 of each clump in described a plurality of LED clump 227 pass described a plurality of through hole 228 and stretches out.Transparency window 230 have respectively with described a plurality of LED clumps 227 in 5 LED, 224 corresponding a plurality of decollators 231 of each clump.Described a plurality of optical sheet 232 can comprise the optical sheet of prismatic lens, diffusion sheet and other types.
As shown in Figure 8, be arranged with a plurality of rectangle LED clumps 227 on each in described a plurality of MCPCB 222.Each clump in described a plurality of LED clump 227 all comprises 2 green LED 224a and 224c, blue LED 224b, red LED 224d and white LEDs 224e.4 color LED 224a, 224b, 224c and 224d are arranged in rectangle (as square), and white LEDs 224e are placed the center of this rectangle.Make described 2 green LED 224a and 224c toward each other.With these LED 224a, 224b, 224c, 224d and 224e is apart opens, make among these LED each not be subjected to the influence of the heat sent from other LED.White LEDs 224e is placed the center of this rectangle, and mix mutually to produce white light from the light of other 4 LED.When described a plurality of LED 224 are top light emitting-type LED, in the horizontal and vertical directions all by the length l of about 20-50mm
3Arrange described a plurality of LED clump 227.When described a plurality of LED 224 are side light emitting-type LED, in the horizontal and vertical directions all by the length l of about 40-200mm
3Arrange described a plurality of LED clump 227.So that the spacing between two adjacent LED clumps is the mode of the twice of the spacing between two adjacent LED in each LED clump at least, described a plurality of LED clumps 227 are arranged among described a plurality of MCPCB 222 each.
Fig. 9 be according to the present invention the 3rd exemplary embodiment in backlight, use the exploded perspective view of a plurality of LED as the LCD device of light source.As shown in Figure 9, be arranged with a plurality of rectangle LED clumps 327 on each in described a plurality of MCPCB 322.Each clump in described a plurality of rectangle LED clump 327 all comprises 5 LED, and wherein 2 LED are green LED 324a and 324c, and 2 LED are red LED 324b and 324d, and 1 LED is blue LED 324e.Described 2 green LED 324a and 324c and described 2 red LED 324b and 324d are arranged in rectangle (as square), and make described 2 green LED 324a and 324c toward each other.Blue LED 324e is placed the center of this rectangle.A plurality of LED 324 of described a plurality of LED clumps 327 are arranged in each other separate fully, make the influence of the heat sent from other LED reduce.
Because above arrangement, the colour temperature that goes up the light that shows at liquid crystal board (Fig. 7 210) has raise.The colour temperature of light is the index that expression light has many heat.For example, orange light has relatively low colour temperature, and blue light has higher relatively colour temperature.When the colour temperature of the light in entering liquid crystal board raises, increase from the brightness of the light of liquid crystal board.As mentioned above, when the LED clump that will comprise 2 green LED, 1 blue LED and 1 red LED was used for light source, the brightness of red LED was very low, made the temperature step-down of light.Add second red LED as described above, improved red brightness, to prevent the temperature step-down of light.
Figure 10 is the schematic isometric of arrangement of a plurality of LED clumps of the 4th exemplary embodiment according to the present invention.On in a plurality of MCPCB 422 each, be arranged with a plurality of rectangle LED clumps 427 with a plurality of additional LED 424f with alternating.Described a plurality of rectangle LED clump 427 comprises 5 LED, and wherein 2 LED are green LED 424a and 424c, and 2 LED are red LED 424b and 424d, and 1 LED is blue LED 424e.Described a plurality of additional LED 424f can be in red, green, blue and the White LED.Described 2 green LED 424a and 424c and described 2 red LED 424b and 424d are arranged in rectangle (as square), make described 2 green LED424a and 424c toward each other.Blue LED 424e is placed the center of this rectangle.By between described a plurality of LED clumps, additional LED 424f being set, have high colour temperature from the light of backlight assembly (Fig. 7 220) emission, so liquid crystal board (Fig. 7 210) shows bright image.When described a plurality of LED424 are top light emitting-type LED, in the horizontal and vertical directions all by the length l of about 20-50mm
4Arrange described a plurality of LED clump 427.When described a plurality of LED 424 are side light emitting-type LED, in the horizontal and vertical directions all by the length l of about 40-200mm
4Arrange described a plurality of LED clump 427.In addition, a plurality of LED 424 of described a plurality of LED clumps 427 are arranged in each other separate fully, make the influence of the heat sent from other LED reduce.
Figure 11 has been the illustration synoptic diagram of the arrangement of a plurality of LED on each MCPCB.As shown in figure 11, on MCPCB 522, be arranged with a plurality of rectangle LED clumps 527 and additional LED 524f.Described a plurality of rectangle LED clump 527 is arranged on MCPCB 522 with embarking on journey, and every provisional capital comprises additional LED 524f.Among these additional LED 524f each all places between the adjacent rectangle LED clump 527.Described a plurality of rectangle LED clump 527 comprises 5 LED, and they are 2 green LED 524a and 524c, 2 red LED 524b and 524d and blue LED 524e.Described a plurality of additional LED 524f can be in red, green, blue and the White LED.Described 2 green LED 524a and 524c and described 2 red LED 524b and 524d are arranged in rectangle (as square), and described 2 green LED 524a and 524c are toward each other.Blue LED 524e places the center of this rectangle.Comprise the light that backlight assembly (Fig. 7 the 220) emission of a plurality of LED of above-mentioned arrangement has high colour temperature, so liquid crystal board (Fig. 7 210) shows bright image.When described a plurality of LED 524 are top light emitting-type LED, in the horizontal and vertical directions all by the length l of about 20-50mm
5Arrange described a plurality of LED clump 527.When described a plurality of LED 524 are side light emitting-type LED, in the horizontal and vertical directions all by the length l of about 40-200mm
5Arrange described a plurality of LED clump 527.In addition, a plurality of LED 524 of described a plurality of LED clumps 527 are arranged in each other and separate fully, make the influence of the heat sent from other LED reduce.
For those skilled in the art, clearly, can under the situation that does not break away from the spirit or scope of the present invention, carry out variations and modifications to backlight assembly and the manufacture method thereof that is used for liquid crystal indicator of the present invention.Thus, the present invention is intended to cover these variants and modifications of the present invention, as long as they drop in the scope of claims and equivalent thereof.
The application requires korean patent application P2005-046273 number and korean patent application P2005-0109218 number the right of priority of submitting in Korea S on November 15th, 2005 in Korea S's submission on May 31st, 2005, and the full content with the two is incorporated into this by reference.
Claims (18)
1, a kind of backlight assembly that is used for liquid crystal indicator, it comprises:
Underframe with inside surface;
Be positioned at a plurality of printed circuit board (PCB)s on the described inside surface, these a plurality of printed circuit board (PCB)s are parallel and be spaced apart from each other; And
Adopt a plurality of light emitting diodes of a plurality of rectangle clump forms in described a plurality of printed circuit board (PCB)s each, each clump in described a plurality of light emitting diode clumps all comprises 4 light emitting diodes,
Wherein, first spacing between 2 adjacent light emitting diode clumps is greater than the twice of second spacing between the center of 2 adjacent light emitting diodes in each light emitting diode clump, wherein said second spacing is greater than the width of each light emitting diode, so that each light emitting diode in each light emitting diode clump is not subjected to the influence of the heat that the adjacent light emitting diode a plurality of light emitting diodes in each light emitting diode clump sends
Wherein, described a plurality of light emitting diode clumps are carried out the segmentation gating to produce white light, thereby segmentation control is carried out in the brightness of liquid crystal board, and by a plurality of light emitting diode clumps of making in the regional back of the dark image of demonstration of liquid crystal board by and make a plurality of light emitting diode clump conducting in the regional back of the bright image of demonstration of liquid crystal board, improve contrast.
2, backlight assembly according to claim 1 also comprises:
Reflector plate has corresponding to each a plurality of through holes in described a plurality of light emitting diodes, and described reflector plate covers the described inside surface of described a plurality of printed circuit board (PCB) and described underframe;
Be positioned at the transparency window on the described reflector plate, described transparency window has described 4 the corresponding decollators of light emitting diode with each light emitting diode clump; And
Be positioned at a plurality of optical sheets on the described transparency window.
3, backlight assembly according to claim 1, wherein, described 4 light emitting diodes are 2 green light emitting diodes, 1 Red LED1 and 1 blue light emitting diode.
4, backlight assembly according to claim 3, wherein, 2 green light emitting diodes toward each other described in each clump in described a plurality of light emitting diode clumps.
5, backlight assembly according to claim 3, wherein, 4 light emitting diodes that are positioned on the capable printed circuit board (PCB) of N have following arrangement: first side and Red LED1 that its medium blue light emitting diode is positioned at described clump are positioned at second side of described clump, and 4 light emitting diodes in addition that are positioned on (N-1) row printed circuit board (PCB) have following arrangement: wherein Red LED1 is positioned at first side of described clump and second side that blue light emitting diode is positioned at described clump.
6, backlight assembly according to claim 3, wherein, 4 light emitting diodes that are positioned on the capable printed circuit board (PCB) of N have following arrangement: first side and Red LED1 that its medium blue light emitting diode is positioned at described clump are positioned at second side of described clump, and 4 light emitting diodes in addition that are positioned on (N-1) row printed circuit board (PCB) have following arrangement: its medium blue light emitting diode is positioned at first side of described clump and second side that Red LED1 is positioned at described clump.
7, backlight assembly according to claim 1, wherein, described a plurality of light emitting diodes are top light-emitting diode (led)s, and described a plurality of light emitting diode clump is by on the direction of about length arrangement of 20 to 50mm in level and vertical direction.
8, backlight assembly according to claim 1, wherein, described a plurality of light emitting diodes are side light-emitting diode (led)s, and described a plurality of light emitting diode clump is by on the direction of about length arrangement of 40 to 200mm in level and vertical direction.
9, a kind of backlight assembly that is used for liquid crystal indicator, it comprises:
Underframe with inside surface;
Be positioned at the printed circuit board (PCB) on the described inside surface; And
Be positioned at a plurality of light emitting diode clumps on the described printed circuit board (PCB), each clump in described a plurality of light emitting diode clump all comprises 5 light emitting diodes, 4 light emitting diodes in wherein said 5 light emitting diodes are aligned to rectangle, and a light emitting diode in described 5 light emitting diodes is positioned at the center of described rectangle
Wherein, described 5 light emitting diodes comprise two green LEDs, a red light emitting diodes, a blue LED and a white light-emitting diode,
Wherein, first spacing between 2 adjacent light emitting diode clumps in described a plurality of light emitting diode clump is greater than the twice of second spacing between the center of 2 adjacent light emitting diodes in each light emitting diode clump, wherein said second spacing is greater than the width of each light emitting diode, so that each light emitting diode is not subjected to the influence of the heat that the adjacent light emitting diode from described a plurality of light emitting diodes sends
Wherein, described a plurality of light emitting diode clumps are carried out the segmentation gating to produce white light, thereby segmentation control is carried out in the brightness of liquid crystal board, and by a plurality of light emitting diode clumps of making in the regional back of the dark image of demonstration of liquid crystal board by and make a plurality of light emitting diode clump conducting in the regional back of the bright image of demonstration of liquid crystal board, improve contrast.
10, backlight assembly according to claim 9 also comprises:
Reflector plate has and the corresponding a plurality of through holes of described a plurality of light emitting diodes, and described reflector plate covers the described inside surface of described printed circuit board (PCB) and described underframe;
Be positioned at the transparency window on the described reflector plate, described transparency window have with described a plurality of light emitting diode clumps in the corresponding a plurality of decollators of described 5 light emitting diodes of each clump; And
Be positioned at a plurality of optical sheets on the described transparency window.
11, backlight assembly according to claim 9, wherein, described 2 green light emitting diodes, described Red LED1 and described blue light emitting diode form described rectangle.
12, backlight assembly according to claim 11, wherein, described 2 green light emitting diodes toward each other.
13, backlight assembly according to claim 9, wherein, described a plurality of light emitting diode clumps are arranged in rows on described printed circuit board (PCB).
14, backlight assembly according to claim 9, wherein, described a plurality of light emitting diode is the top light-emitting diode (led), and each clump in described a plurality of light emitting diode clump is by on the direction of about length arrangement of 20 to 50mm in level and vertical direction.
15, backlight assembly according to claim 9, wherein, described a plurality of light emitting diode is the side light-emitting diode (led), and each clump in described a plurality of light emitting diode clump is by on the direction of about length arrangement of 40 to 200mm in level and vertical direction.
16, a kind of liquid crystal indicator, it comprises:
Backlight assembly, it comprises:
Underframe with inside surface;
Be positioned at a plurality of printed circuit board (PCB)s on the described inside surface, these a plurality of printed circuit board (PCB)s are set to parallel and are spaced apart from each other;
Adopt a plurality of light emitting diodes of a plurality of rectangle clump forms in described a plurality of printed circuit board (PCB)s each, each clump in described a plurality of light emitting diode clumps all comprises 4 light emitting diodes;
Reflector plate has and the corresponding a plurality of through holes of described a plurality of light emitting diodes, and described reflector plate covers the described inside surface of described printed circuit board (PCB) and described underframe;
Be positioned at the transparency window on the described reflector plate, described transparency window have with described a plurality of light emitting diode clumps in the corresponding a plurality of decollators of described 4 light emitting diodes of each clump; And
Be positioned at a plurality of optical sheets on the described transparency window, and
Be positioned at the liquid crystal board on described a plurality of optical sheet;
Surround the main frame of described backlight assembly and described liquid crystal board; And
Surround the top frame at the edge, front of described liquid crystal board,
Wherein, first spacing between 2 adjacent light emitting diode clumps is greater than the twice of second spacing between the center of 2 adjacent light emitting diodes in each light emitting diode clump, wherein said second spacing is greater than each the width in described a plurality of light emitting diodes, so that each light emitting diode is not subjected to the influence of the heat that the adjacent light emitting diode from described a plurality of light emitting diodes sends
Wherein, described a plurality of light emitting diode clumps are carried out the segmentation gating to produce white light, thereby segmentation control is carried out in the brightness of liquid crystal board, and by a plurality of light emitting diode clumps of making in the regional back of the dark image of demonstration of liquid crystal board by and make a plurality of light emitting diode clump conducting in the regional back of the bright image of demonstration of liquid crystal board, improve contrast.
17, a kind of liquid crystal indicator, it comprises:
Backlight assembly, it comprises:
Underframe with inside surface;
Be positioned at a plurality of printed circuit board (PCB)s on the described inside surface;
Adopt a plurality of light emitting diodes of a plurality of rectangle clump forms in described a plurality of printed circuit board (PCB)s each, each clump in described a plurality of light emitting diode clump all comprises 5 light emitting diodes that are arranged in rectangle, and a light emitting diode in described 5 light emitting diodes is positioned at the center of described rectangle;
Reflector plate has and the corresponding a plurality of through holes of described a plurality of light emitting diodes, and described reflector plate covers the described inside surface of described printed circuit board (PCB) and described underframe;
Be positioned at the transparency window on the described reflector plate, described transparency window have with described a plurality of light emitting diode clumps in the corresponding a plurality of decollators of described 5 light emitting diodes of each clump; And
Be positioned at a plurality of optical sheets on the described transparency window,
Wherein, described 5 light emitting diodes comprise two green LEDs, a red light emitting diodes, a blue LED and a white light-emitting diode, and are positioned at the liquid crystal board on described a plurality of optical sheet;
Surround the main frame of described backlight assembly and described liquid crystal board; And
Surround the top frame at the edge, front of described liquid crystal board,
Wherein, first spacing between 2 adjacent light emitting diode clumps is greater than the twice of second spacing between the center of 2 adjacent light emitting diodes in each light emitting diode clump, wherein said second spacing is greater than each the width in described a plurality of light emitting diodes, so that each light emitting diode is not subjected to the influence of the heat that the adjacent light emitting diode from described a plurality of light emitting diodes sends
Wherein, described a plurality of light emitting diode clumps are carried out the segmentation gating to produce white light, thereby segmentation control is carried out in the brightness of liquid crystal board, and by a plurality of light emitting diode clumps of making in the regional back of the dark image of demonstration of liquid crystal board by and make a plurality of light emitting diode clump conducting in the regional back of the bright image of demonstration of liquid crystal board, improve contrast.
18, liquid crystal indicator according to claim 17 also comprises:
Place the additional light emitting diode between 2 adjacent light emitting diode clumps on the described printed circuit board (PCB).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050046273 | 2005-05-31 | ||
| KR20050046273 | 2005-05-31 | ||
| KR1020050109218 | 2005-11-15 |
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| Publication Number | Publication Date |
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| CN1873503A CN1873503A (en) | 2006-12-06 |
| CN100559242C true CN100559242C (en) | 2009-11-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100850815A Active CN100559242C (en) | 2005-05-31 | 2006-05-31 | The backlight assembly of liquid crystal indicator and use the liquid crystal indicator of this backlight assembly |
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| KR (1) | KR101217663B1 (en) |
| CN (1) | CN100559242C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100780187B1 (en) * | 2006-04-06 | 2007-11-27 | 삼성전기주식회사 | LCD BACKLIGHT UNIT USING LEDs |
| JP2008186802A (en) * | 2007-01-04 | 2008-08-14 | Toshiba Corp | Backlight device, and liquid crystal display device |
| KR101480358B1 (en) | 2008-05-19 | 2015-01-12 | 삼성디스플레이 주식회사 | Liquid crystal display and driving method of the same |
| KR101023716B1 (en) * | 2008-08-27 | 2011-03-25 | 엘지디스플레이 주식회사 | Back light unit and liquid crystal display device using the same |
| CN102449381A (en) * | 2009-06-15 | 2012-05-09 | 夏普株式会社 | Light-source unit, lighting device, displaying device, television-receiver device, and manufacturing method of reflection-sheets for light-sources |
| CN103104858B (en) * | 2011-11-15 | 2016-08-31 | 群康科技(深圳)有限公司 | Backlight module and display device |
| CN102644880A (en) * | 2012-03-30 | 2012-08-22 | 深圳市华星光电技术有限公司 | Light-emitting diode (LED) strip structure and backlight module |
| KR101992718B1 (en) * | 2012-04-24 | 2019-06-26 | 삼성전자주식회사 | Display apparatus |
| CN103899980A (en) * | 2012-12-25 | 2014-07-02 | 深鑫成光电（深圳）有限公司 | Backlight module and liquid crystal display device |
| KR20230164085A (en) * | 2021-04-08 | 2023-12-01 | 엘지전자 주식회사 | display device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3124208B2 (en) * | 1995-03-30 | 2001-01-15 | 株式会社東芝 | LED display and LED display system |
| JP2927279B2 (en) * | 1996-07-29 | 1999-07-28 | 日亜化学工業株式会社 | Light emitting diode |
| JP3287457B2 (en) * | 1997-10-31 | 2002-06-04 | 日亜化学工業株式会社 | LED display and LED display device |
| JP2004342587A (en) * | 2003-04-22 | 2004-12-02 | Advanced Display Inc | Backlight and liquid crystal display using it |
-
2005
- 2005-11-15 KR KR1020050109218A patent/KR101217663B1/en active IP Right Grant
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| KR101217663B1 (en) | 2013-01-02 |
| KR20060124541A (en) | 2006-12-05 |
| CN1873503A (en) | 2006-12-06 |
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