US20100265106A1 - Light-Emitting Device and Electronic Device Using The Same - Google Patents
Light-Emitting Device and Electronic Device Using The Same Download PDFInfo
- Publication number
- US20100265106A1 US20100265106A1 US12/829,793 US82979310A US2010265106A1 US 20100265106 A1 US20100265106 A1 US 20100265106A1 US 82979310 A US82979310 A US 82979310A US 2010265106 A1 US2010265106 A1 US 2010265106A1
- Authority
- US
- United States
- Prior art keywords
- light
- guiding plate
- hole
- light source
- source unit
- 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.)
- Abandoned
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/22—Illumination; Arrangements for improving the visibility of characters on dials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0274—Optical details, e.g. printed circuits comprising integral optical means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/056—Diffuser; Uneven surface
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/06—Reflector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2219/00—Legends
- H01H2219/054—Optical elements
- H01H2219/062—Light conductor
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10431—Details of mounted components
- H05K2201/10439—Position of a single component
- H05K2201/10477—Inverted
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2054—Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics
Definitions
- the invention relates in general to a light-emitting device and an electronic device using the same, and more particularly to a light-emitting device with multi-faceted light guiding effect and an electronic device using the same.
- LED Light emitting diode
- OLED organic light emitting diode
- LED as an example of light emitting source for the keypad of a mobile phone.
- a number of LEDs are disposed on the circuit board of the mobile phone.
- the LEDs are disposed under the keypad of the mobile phone, and a light-guiding plate is disposed between the LEDs and the keypad.
- the light emitted from the LEDs is projected onto the keypad through the light-guiding plate.
- each LED has specific lighting range and emission intensity, in order to assure that each press key on the keypad has sufficient illumination, several LEDs are used to meet the requirement. It requires not only more manufacturing cost but also consumes more power.
- the LEDs and the light-guiding plate both have certain thickness. When the LEDs and the light-guiding plate are disposed between the circuit board and the keypad of the mobile phone, the overall thickness of the mobile phone will be increased.
- the invention is directed to a light-emitting device and an electronic device using the same.
- the light-guiding plate of the light-emitting device has many holes.
- the light sources of the light-emitting device are disposed within the holes.
- the side-wall inside the hole of the light-guiding plate has special structure, and a reflective layer is disposed upon the hole. Therefore, when the light sources emit lights, the lights do not come out of the holes directly but are guided to the light-guiding plate through the reflective plate and then come out of the light-guiding plate at many different locations and along different directions.
- a light-emitting device including a light-guiding plate, a circuit board, at lease one light source unit and a reflective layer.
- the light-guiding plate has at lease one hole.
- the circuit board is disposed under the light-guiding plate.
- the light source unit disposed on the circuit board is within the hole.
- the reflective layer is disposed on the light-guiding plate and above the hole.
- an electronic device including a keypad and a light-emitting device.
- the light-emitting device includes a light-guiding plate, a circuit board, at lease one light source unit and a reflective layer.
- the light-guiding plate disposed on one side of the keypad includes at lease one hole.
- the circuit board is disposed under the light-guiding plate.
- the light source unit is disposed on the circuit board and within the hole.
- the reflective layer is disposed on the light-guiding plate and above the hole. The reflective layer is positioned between the keypad and the light-guiding plate.
- FIG. 1A is a 3-D perspective of a light-emitting device according to a preferred embodiment of the invention
- FIG. 1B is an exploded diagram of the light-emitting device of FIG. 1A ;
- FIG. 2A is a cross-sectional view of the light-guiding plate with beveled side-wall according to the light-emitting device of FIG. 1A ;
- FIG. 2B is a cross-sectional view of the light-guiding plate with V-cut side-wall according to the light-emitting device of FIG. 1A ;
- FIG. 3 is a partial exploded diagram of an electronic device according to a preferred embodiment of the invention.
- FIG. 1A is a 3-D perspective of a light-emitting device according to a preferred embodiment of the invention.
- FIG. 1B is an exploded diagram of the light-emitting device of FIG. 1A .
- the light-emitting device 1 includes a light-guiding plate 10 , a circuit board 12 , at lease one light source unit 14 , and a reflective layer 16 .
- the light-guiding plate 10 includes at lease one hole 18 .
- the circuit board 12 is disposed under the light-guiding plate 10 .
- the reflective layer 16 is disposed above the light-guiding plate 10 .
- the light source unit 14 disposed on the circuit board 12 is within the hole 18 .
- the reflective layer 16 is disposed above the hole 18 .
- the light-guiding plate 10 includes a number of holes 18 , and a number of light source units 14 are disposed on the circuit board 12 .
- the light source unit 14 having at lease one light emitting diode (LED) package or one LED chip is disposed on and is electrically connected to the circuit board 12 .
- the LED package or LED chip of light source unit 14 is driven to emit a light by the circuit board 12 .
- one hole 18 has one light source unit 14 disposed therein, that is, the number of the light source units 14 is the same as that of the holes 18 .
- FIG. 2A a cross-sectional view of the light-guiding plate with beveled side-wall according to the light-emitting device of FIG. 1A .
- the light source unit 14 enters the light-guiding plate 10 via at lease one side-wall 10 A inside the hole 18 . Therefore, the hole 18 is designed according to the optical path and direction of the light emitted from the light source unit 14 .
- the side-wall 10 A connected to the top surface and the bottom surface of the light-guiding plate 10 is not perpendicular to the top surface or the bottom surface of the light-guiding plate 10 but forms a bevel or a curved surface.
- the hole 18 can be rectangular, circular or elliptical shape.
- the holes 18 positioned on the light-guiding plate 10 are rectangular shape.
- the side-wall 10 A inside the hole 18 of the light-guiding plate 10 is a bevel.
- the light source unit 14 emits a light
- the light can not be projected out of the hole 18 directly because the reflective layer 16 is disposed above the hole 18 .
- the light (the light L 1 and the light L 2 of FIG. 2A ) is reflected by the reflective layer 16 to enter the light-guiding plate 10 through the side-wall 10 A of the hole 18 and is diffused by the light-guiding plate 10 .
- the incident angle of the light can be adjusted.
- the bevel of FIG. 2A can be replaced by a curved surface.
- FIG. 2B a cross-sectional view of the light-guiding plate with V-cut side-wall according to the light-emitting device of FIG. 1A .
- the side-wall 10 A′ inside the hole 18 ′ positioned on the light-guiding plate 10 has many connected V-cut grooves.
- the light such as the light L 1 ′ and the light L 2 ′ of FIG. 2B
- the reflective layer 16 Because the V-cut grooves each have two incident surfaces, the adjustment of the incident angle of the light is more flexible.
- the light source unit 14 includes an LED chip or an LED package, and the intensity of illumination in the direction nearly perpendicular to the top surface or the bottom surface of the light-guiding plate 10 is the largest.
- the LED chip or the LED package emits a light
- the light is directly projected out of the hole 18 or 18 ′ and the lighting range cannot be enlarged.
- a reflective layer 16 above the hole 18 or 18 ′, the light emitted from the light source unit 14 is guided to the light-guiding plate 10 through the side-wall 10 A or 10 A′, such that the lighting range is enlarged by the reflective layer 16 , and the light is diffused in the light-guiding plate 10 uniformly.
- one hole 18 has one light source unit 14 disposed therein.
- one hole 18 can have more than one light source unit disposed therein. Any designs having an opening on the light-guiding plate 10 and embedded with one or more than one light source units into the opening are within the scope of the invention.
- the light source unit 14 of the light-emitting device 1 is exemplified by an LED chip or an LED package, the technology of the invention is not limited thereto.
- the light source unit 14 can be other LED devices, such as organic electro-luminescence device (OELD) or organic light emitting diode (OLED).
- the light-emitting device 1 can be used for illuminating the keypad of an electronic device.
- FIG. 3 a partial exploded diagram of an electronic device according to a preferred embodiment of the invention is shown.
- the electronic device 100 includes a keypad 110 and a light-emitting assembly 120 , wherein the light-emitting assembly 120 is disposed on one side of the keypad 110 .
- the keypad 110 includes several press keys 111 arranged in three columns for example.
- the numbers, symbols or letters on the press keys 111 are transparent or semi-transparent such that the keypad 110 can be illuminated even in a dark environment or at nighttime.
- the light-emitting assembly 120 includes the light-emitting device 1 disclosed in FIG. 1A .
- the light-emitting assembly 120 includes a light-guiding plate 10 ′, a circuit board 12 ′, two reflective layers 16 ′ and a number of light source units 14 ′ arranged in two columns.
- the reflective layer 16 ′ and the light source unit 14 ′ are disposed in correspondence to the gap between the first column R 1 and the second column R 1 of the keypad 110 and the gap between the second column R 2 and the third column R 3 .
- the present embodiment of the invention is exemplified by the arrangement that the light-emitting assembly 120 of the electronic device 100 includes two reflective layers 16 ′ and a number of light source units 14 arranged in two columns and correspondingly disposed between the columns of the keypad 110 , the technology of the invention is not limited thereto.
- the position and the shape of the hole positioned on the light-guiding plate 10 ′ of the electronic device 100 are designed according to actual needs, such that the light emitted from the light source unit 14 ′ is uniformly diffused to the keypad 110 through the light-guiding plate 10 ′.
- the LED light source is disposed under the light-guiding plate.
- the light-guiding plate 10 of the light-emitting device 1 (refer to FIG. 1B ) has several holes 18 , and the shapes of the holes 18 are not limited to any particular shape. With a bevel or a V-cut groove on the side-wall 10 A of the holes 18 , the out-going angle and the direction of the light are adjusted such that the light has the effect of multi-faceted diffusion.
- the light source unit 14 is disposed within the hole 18 of the light-guiding plate 10 , such that the thickness of the device is reduced.
- the light-emitting device of the present embodiment of the invention has lower optical loss but higher optical availability.
- a hole with specific shape is positioned on the light-guiding plate, and a light source unit disposed on the circuit board is embedded within the hole, such that the emitting direction of the light from the light source unit is changed through the hole.
- the light-emitting device has simple structure and is easy to assemble. It is indeed an economic and practical way to dispose the light-emitting device in the electronic device for providing light to the keypad such that the keypad has uniform illumination.
Abstract
A light-emitting device and an electronic device using the same are provided. The light-emitting device includes a light-guiding plate, a circuit board, at lease one light source unit and a reflective layer. The circuit board is disposed under the light-guiding plate. The reflective layer is disposed above the light-guiding plate. The light-guiding plate has at lease one hole. The light source unit is disposed on the circuit board and within the hole. The reflective layer is disposed above the hole. The light-emitting device is disposed on one side of a part, such as a keypad, of the electronic device for providing light to the keypad.
Description
- This application claims the benefit of Taiwan application Serial No. 96108621, filed Mar. 13, 2007, the subject matter of which is incorporated herein by reference.
- 1. Field of the Invention
- The invention relates in general to a light-emitting device and an electronic device using the same, and more particularly to a light-emitting device with multi-faceted light guiding effect and an electronic device using the same.
- 2. Description of the Related Art
- For enabling users to operate electronic devices, such as mobile phone, PDA, or digital camera, in a dark environment or at nighttime, the electronic devices are normally equipped with light emitting elements. Light emitting diode (LED) or organic light emitting diode (OLED), having the advantages of small size, no radiation, low power consumption and fast response, has been widely used in the illumination of many electronic devices.
- Take LED as an example of light emitting source for the keypad of a mobile phone. Normally, a number of LEDs are disposed on the circuit board of the mobile phone. The LEDs are disposed under the keypad of the mobile phone, and a light-guiding plate is disposed between the LEDs and the keypad. The light emitted from the LEDs is projected onto the keypad through the light-guiding plate. As each LED has specific lighting range and emission intensity, in order to assure that each press key on the keypad has sufficient illumination, several LEDs are used to meet the requirement. It requires not only more manufacturing cost but also consumes more power. Moreover, the LEDs and the light-guiding plate both have certain thickness. When the LEDs and the light-guiding plate are disposed between the circuit board and the keypad of the mobile phone, the overall thickness of the mobile phone will be increased.
- The invention is directed to a light-emitting device and an electronic device using the same. The light-guiding plate of the light-emitting device has many holes. The light sources of the light-emitting device are disposed within the holes. The side-wall inside the hole of the light-guiding plate has special structure, and a reflective layer is disposed upon the hole. Therefore, when the light sources emit lights, the lights do not come out of the holes directly but are guided to the light-guiding plate through the reflective plate and then come out of the light-guiding plate at many different locations and along different directions.
- According to a first aspect of the present invention, a light-emitting device including a light-guiding plate, a circuit board, at lease one light source unit and a reflective layer is provided. The light-guiding plate has at lease one hole. The circuit board is disposed under the light-guiding plate. The light source unit disposed on the circuit board is within the hole. The reflective layer is disposed on the light-guiding plate and above the hole.
- According to a second aspect of the present invention, an electronic device including a keypad and a light-emitting device is provided. The light-emitting device includes a light-guiding plate, a circuit board, at lease one light source unit and a reflective layer. The light-guiding plate disposed on one side of the keypad includes at lease one hole. The circuit board is disposed under the light-guiding plate. The light source unit is disposed on the circuit board and within the hole. The reflective layer is disposed on the light-guiding plate and above the hole. The reflective layer is positioned between the keypad and the light-guiding plate.
- The invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The following description is made with reference to the accompanying drawings.
-
FIG. 1A is a 3-D perspective of a light-emitting device according to a preferred embodiment of the invention -
FIG. 1B is an exploded diagram of the light-emitting device ofFIG. 1A ; -
FIG. 2A is a cross-sectional view of the light-guiding plate with beveled side-wall according to the light-emitting device ofFIG. 1A ; -
FIG. 2B is a cross-sectional view of the light-guiding plate with V-cut side-wall according to the light-emitting device ofFIG. 1A ; and -
FIG. 3 is a partial exploded diagram of an electronic device according to a preferred embodiment of the invention. - Please refer to
FIG. 1A˜1B .FIG. 1A is a 3-D perspective of a light-emitting device according to a preferred embodiment of the invention.FIG. 1B is an exploded diagram of the light-emitting device ofFIG. 1A . As indicated inFIGS. 1A˜1B , the light-emitting device 1 includes a light-guidingplate 10, acircuit board 12, at lease onelight source unit 14, and areflective layer 16. The light-guidingplate 10 includes at lease onehole 18. Thecircuit board 12 is disposed under the light-guidingplate 10. Thereflective layer 16 is disposed above the light-guidingplate 10. Thelight source unit 14 disposed on thecircuit board 12 is within thehole 18. Thereflective layer 16 is disposed above thehole 18. When thelight source unit 14 is driven to emit a light, the light enters the light-guidingplate 10 via thereflective layer 16 and then is diffused by the light-guidingplate 10. - As indicated in
FIG. 1B , in the present embodiment of the invention, the light-guidingplate 10 includes a number ofholes 18, and a number oflight source units 14 are disposed on thecircuit board 12. Thelight source unit 14 having at lease one light emitting diode (LED) package or one LED chip is disposed on and is electrically connected to thecircuit board 12. The LED package or LED chip oflight source unit 14 is driven to emit a light by thecircuit board 12. Preferably, onehole 18 has onelight source unit 14 disposed therein, that is, the number of thelight source units 14 is the same as that of theholes 18. - The shape of a
hole 18 positioned on the light-guidingplate 10 is illustrated inFIG. 2A , a cross-sectional view of the light-guiding plate with beveled side-wall according to the light-emitting device ofFIG. 1A . Thelight source unit 14 enters the light-guidingplate 10 via at lease one side-wall 10A inside thehole 18. Therefore, thehole 18 is designed according to the optical path and direction of the light emitted from thelight source unit 14. Preferably, the side-wall 10A connected to the top surface and the bottom surface of the light-guidingplate 10 is not perpendicular to the top surface or the bottom surface of the light-guidingplate 10 but forms a bevel or a curved surface. Thehole 18 can be rectangular, circular or elliptical shape. Referring toFIG. 1B , in the present embodiment of the invention, theholes 18 positioned on the light-guidingplate 10 are rectangular shape. As indicated inFIG. 2A , the side-wall 10A inside thehole 18 of the light-guidingplate 10 is a bevel. When thelight source unit 14 emits a light, the light can not be projected out of thehole 18 directly because thereflective layer 16 is disposed above thehole 18. Meanwhile, the light (the light L1 and the light L2 ofFIG. 2A ) is reflected by thereflective layer 16 to enter the light-guidingplate 10 through the side-wall 10A of thehole 18 and is diffused by the light-guidingplate 10. With the angle between the bevel of the light-guidingplate 10 and the top surface and the angle between the bevel of the light-guidingplate 10 and the bottom surface, the incident angle of the light can be adjusted. The bevel ofFIG. 2A can be replaced by a curved surface. - The other design of the hole is illustrated in
FIG. 2B , a cross-sectional view of the light-guiding plate with V-cut side-wall according to the light-emitting device ofFIG. 1A . As indicated inFIG. 2B , the side-wall 10A′ inside thehole 18′ positioned on the light-guidingplate 10 has many connected V-cut grooves. When thelight source unit 14 emits a light, the light, such as the light L1′ and the light L2′ ofFIG. 2B , is reflected to the V-cut grooves via thereflective layer 16. Because the V-cut grooves each have two incident surfaces, the adjustment of the incident angle of the light is more flexible. - The
light source unit 14 includes an LED chip or an LED package, and the intensity of illumination in the direction nearly perpendicular to the top surface or the bottom surface of the light-guidingplate 10 is the largest. When the LED chip or the LED package emits a light, the light is directly projected out of thehole reflective layer 16 above thehole light source unit 14 is guided to the light-guidingplate 10 through the side-wall reflective layer 16, and the light is diffused in the light-guidingplate 10 uniformly. - In the light-emitting
device 1 of the present embodiment of the invention, onehole 18 has onelight source unit 14 disposed therein. In practical application, onehole 18 can have more than one light source unit disposed therein. Any designs having an opening on the light-guidingplate 10 and embedded with one or more than one light source units into the opening are within the scope of the invention. Despite in the present embodiment of the invention, thelight source unit 14 of the light-emittingdevice 1 is exemplified by an LED chip or an LED package, the technology of the invention is not limited thereto. Thelight source unit 14 can be other LED devices, such as organic electro-luminescence device (OELD) or organic light emitting diode (OLED). - The light-emitting
device 1 can be used for illuminating the keypad of an electronic device. Referring toFIG. 3 , a partial exploded diagram of an electronic device according to a preferred embodiment of the invention is shown. As indicated inFIG. 3 , theelectronic device 100 includes akeypad 110 and a light-emittingassembly 120, wherein the light-emittingassembly 120 is disposed on one side of thekeypad 110. Thekeypad 110 includesseveral press keys 111 arranged in three columns for example. The numbers, symbols or letters on the press keys 111 (only numbers and symbols are illustrated in the present embodiment of the invention) are transparent or semi-transparent such that thekeypad 110 can be illuminated even in a dark environment or at nighttime. The light-emittingassembly 120 includes the light-emittingdevice 1 disclosed inFIG. 1A . Preferably, to cooperate with the disposition of thepress key 111 ofFIG. 3 , the light-emittingassembly 120 includes a light-guidingplate 10′, acircuit board 12′, tworeflective layers 16′ and a number oflight source units 14′ arranged in two columns. Thereflective layer 16′ and thelight source unit 14′ are disposed in correspondence to the gap between the first column R1 and the second column R1 of thekeypad 110 and the gap between the second column R2 and the third column R3. When all thelight source units 14′ are driven to emit lights by thecircuit board 12′, the lights are reflected by thereflective layer 16′ and enters the light-guidingplate 10′, such that the lights are uniformly diffused to thepress key 111. - Despite the present embodiment of the invention is exemplified by the arrangement that the light-emitting
assembly 120 of theelectronic device 100 includes tworeflective layers 16′ and a number oflight source units 14 arranged in two columns and correspondingly disposed between the columns of thekeypad 110, the technology of the invention is not limited thereto. In practical application, the position and the shape of the hole positioned on the light-guidingplate 10′ of theelectronic device 100 are designed according to actual needs, such that the light emitted from thelight source unit 14′ is uniformly diffused to thekeypad 110 through the light-guidingplate 10′. - According to conventional light guiding method, the LED light source is disposed under the light-guiding plate. In the present embodiment of the invention, the light-guiding
plate 10 of the light-emitting device 1 (refer toFIG. 1B ) hasseveral holes 18, and the shapes of theholes 18 are not limited to any particular shape. With a bevel or a V-cut groove on the side-wall 10A of theholes 18, the out-going angle and the direction of the light are adjusted such that the light has the effect of multi-faceted diffusion. Besides, thelight source unit 14 is disposed within thehole 18 of the light-guidingplate 10, such that the thickness of the device is reduced. Moreover, as thereflective layer 16 is disposed above thehole 18 and thelight source unit 14 is directly embedded into the light-guidingplate 10, the light of thelight source unit 14 is reflected by thereflective layer 16 and enters the light-guidingplate 10 directly. As a result, the light-emitting device of the present embodiment of the invention has lower optical loss but higher optical availability. - According to the light-emitting device and an electronic device using the same disclosed in the above embodiment of the invention, a hole with specific shape is positioned on the light-guiding plate, and a light source unit disposed on the circuit board is embedded within the hole, such that the emitting direction of the light from the light source unit is changed through the hole. As a result, the out-going direction and position of the light are adjusted and multi-faceted diffusion effect is shown. The light-emitting device has simple structure and is easy to assemble. It is indeed an economic and practical way to dispose the light-emitting device in the electronic device for providing light to the keypad such that the keypad has uniform illumination.
- While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
Claims (20)
1. A light-emitting device, comprising:
a light-guiding plate comprising at lease one hole;
a circuit board disposed under the light-guiding plate;
at lease one light source unit disposed on the circuit board and within the hole; and
a reflective layer disposed on the light-guiding plate and above the hole.
2. The light-emitting device according to claim 1 , wherein when the light source unit is driven to emit a light, the light emitted from the light source unit is reflected by the reflective layer to enter the light-guiding plate and is diffused by the light-guiding plate.
3. The light-emitting device according to claim 1 , wherein the light-guiding plate has at lease one side wall positioned inside the hole, the light-guiding plate has a top surface and a bottom surface, the side-wall connects the top surface and the bottom surface, the light emitted from the light source unit enters the light-guiding plate via the side-wall.
4. The light-emitting device according to claim 3 , wherein the side-wall inside the hole is substantially not perpendicular to the top surface or the bottom surface.
5. The light-emitting device according to claim 3 , wherein the side-wall inside the hole comprises a bevel.
6. The light-emitting device according to claim 3 , wherein the side-wall inside the hole comprises a curved surface.
7. The light-emitting device according to claim 3 , wherein the side-wall inside the hole has a plurality of connected V-cut grooves.
8. The light-emitting device according to claim 1 , wherein the light-guiding plate comprises a plurality of holes, a plurality of light source units having the same number with the holes are disposed on the circuit board, the light source units are respectively disposed within the holes.
9. The light-emitting device according to claim 1 , wherein the light source unit comprises at lease one light emitting diode (LED) package.
10. The light-emitting device according to claim 1 , wherein the light source unit comprises at lease one LED chip.
11. An electronic device, comprising:
a keypad; and
a light-emitting device, comprising:
a light-guiding plate disposed on one side of the keypad, wherein the light-guiding plate comprises at lease one hole;
a circuit board disposed under the light-guiding plate;
at lease one light source unit disposed on the circuit board and within the hole; and
a reflective layer disposed above the hole and between the keypad and the light-guiding plate.
12. The electronic device according to claim 11 , wherein when the light source unit is driven to emit a light, the light emitted from the light source unit is reflected by the reflective layer to enter the light-guiding plate and is diffused by the light-guiding plate.
13. The electronic device according to claim 11 , wherein the light-guiding plate has at lease one side wall positioned inside the hole of the circuit board, the light-guiding plate has a top surface and a bottom surface, the side-wall connects the top surface and the bottom surface, the light emitted from the light source unit enters the light-guiding plate via the side-wall.
14. The electronic device according to claim 13 , wherein the side-wall inside the hole is substantially not perpendicular to the top surface or the bottom surface.
15. The electronic device according to claim 13 , wherein the side-wall inside the hole comprises a bevel.
16. The electronic device according to claim 13 , wherein the side-wall inside the hole comprises a curved surface.
17. The electronic device according to claim 13 , wherein the side-wall inside the hole has a plurality of connected V-cut grooves.
18. The electronic device according to claim 11 , wherein the light-guiding plate comprises a plurality of holes, a plurality of light source units having the same number with the holes are disposed on the circuit board, the light source units are respectively disposed within the holes.
19. The electronic device according to claim 11 , wherein the light source unit comprises at lease one LED package.
20. The electronic device according to claim 11 , wherein the light source unit comprises at lease one LED chip.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/829,793 US20100265106A1 (en) | 2007-03-13 | 2010-07-02 | Light-Emitting Device and Electronic Device Using The Same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW96108621 | 2007-03-13 | ||
TW096108621A TWI329373B (en) | 2007-03-13 | 2007-03-13 | Light-emitting device and electronic device using the same |
US12/071,422 US7789546B2 (en) | 2007-03-13 | 2008-02-21 | Light-emitting device and electronic device using the same |
US12/829,793 US20100265106A1 (en) | 2007-03-13 | 2010-07-02 | Light-Emitting Device and Electronic Device Using The Same |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/071,422 Continuation US7789546B2 (en) | 2007-03-13 | 2008-02-21 | Light-emitting device and electronic device using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100265106A1 true US20100265106A1 (en) | 2010-10-21 |
Family
ID=39762457
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/071,422 Active 2028-09-23 US7789546B2 (en) | 2007-03-13 | 2008-02-21 | Light-emitting device and electronic device using the same |
US12/829,793 Abandoned US20100265106A1 (en) | 2007-03-13 | 2010-07-02 | Light-Emitting Device and Electronic Device Using The Same |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/071,422 Active 2028-09-23 US7789546B2 (en) | 2007-03-13 | 2008-02-21 | Light-emitting device and electronic device using the same |
Country Status (2)
Country | Link |
---|---|
US (2) | US7789546B2 (en) |
TW (1) | TWI329373B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130265170A1 (en) * | 2012-04-06 | 2013-10-10 | Hon Hai Precision Industry Co., Ltd. | Indicating unit and electronic device using same |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201655596U (en) * | 2010-04-13 | 2010-11-24 | 英华达(上海)科技有限公司 | Light guiding structure of light-transmitting button |
CN102305362B (en) * | 2011-08-19 | 2013-06-12 | 宁波德嘉照明科技有限公司 | Light-emitting diode (LED) tube lamp |
CN103292168B (en) * | 2012-03-05 | 2016-09-28 | 海洋王照明科技股份有限公司 | A kind of light fixture |
TWI576880B (en) * | 2012-07-04 | 2017-04-01 | 禎信股份有限公司 | Backlight module and keyboard using the same |
US9239137B2 (en) | 2012-09-28 | 2016-01-19 | Empire Technology Development Llc | Lighting device and methods of making the same |
CN103912847A (en) * | 2013-01-09 | 2014-07-09 | 北京京东方光电科技有限公司 | Light guide plate, backlight source and display device |
TWI632827B (en) * | 2013-11-15 | 2018-08-11 | 薩摩亞商齊凌科技有限公司 | Intelligent lighting apparatus |
TWI573962B (en) * | 2014-04-11 | 2017-03-11 | 新世紀光電股份有限公司 | Lamp structure |
CN105570727B (en) * | 2014-10-16 | 2018-03-13 | 比亚迪股份有限公司 | Led |
US10775028B2 (en) * | 2014-12-11 | 2020-09-15 | Datalogic Ip Tech S.R.L. | Printed circuit board aperture based illumination system for pattern projection |
CN105822935B (en) | 2015-01-05 | 2019-03-15 | 合肥京东方显示光源有限公司 | Lamp bar and display device |
USD765612S1 (en) * | 2015-07-16 | 2016-09-06 | Sumitomo Electric Industries, Ltd. | Light source module |
CN106051608A (en) * | 2016-06-16 | 2016-10-26 | 合肥嫩芽科技有限公司 | LED colorful lamp capable of being freely disassembled and assembled |
CN106646725A (en) * | 2017-02-23 | 2017-05-10 | 康佳集团股份有限公司 | Lateral backlight module and LCD TV |
CN107120552A (en) * | 2017-05-11 | 2017-09-01 | 成都特普瑞斯节能环保科技有限公司 | A kind of electricity-saving lamp |
TWI668722B (en) * | 2019-01-30 | 2019-08-11 | 群光電能科技股份有限公司 | Illuminating keyboard and light emitting module thereof |
CN112996302B (en) * | 2019-12-13 | 2022-08-16 | 华硕电脑股份有限公司 | Electronic device |
JP6868716B1 (en) * | 2020-01-09 | 2021-05-12 | レノボ・シンガポール・プライベート・リミテッド | Electronics |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4714983A (en) * | 1985-06-10 | 1987-12-22 | Motorola, Inc. | Uniform emission backlight |
US5397867A (en) * | 1992-09-04 | 1995-03-14 | Lucas Industries, Inc. | Light distribution for illuminated keyboard switches and displays |
US20060114690A1 (en) * | 2004-11-26 | 2006-06-01 | Seiji Iki | Back-lighting unit and liquid crystal display using the same |
US20070086179A1 (en) * | 2005-10-14 | 2007-04-19 | Radiant Opto-Electronics Corporation | Light mixing plate and direct backlight module |
US7287891B1 (en) * | 2006-02-06 | 2007-10-30 | Samsung Electronics Co., Ltd. | Backlight assembly and display device having the same |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3857004A (en) * | 1973-06-08 | 1974-12-24 | Mccord Corp | Liquid level sensor |
US7377163B2 (en) * | 2003-06-19 | 2008-05-27 | Denso Corporation | Liquid level detector |
JP4363268B2 (en) * | 2004-07-08 | 2009-11-11 | 三菱電機株式会社 | Surface light source device |
TWM296384U (en) | 2006-03-10 | 2006-08-21 | Hon Hai Prec Ind Co Ltd | Light guide plates and electronic products using the same |
JPWO2007132781A1 (en) * | 2006-05-12 | 2009-09-24 | アルプス電気株式会社 | Input device with illumination function |
TWM320740U (en) * | 2006-11-24 | 2007-10-11 | Lite On Technology Corp | Light emitting module for key device |
CN101256911B (en) * | 2008-04-11 | 2012-06-06 | 精模电子科技(深圳)有限公司 | Luminous keyboard with light conducting plate |
-
2007
- 2007-03-13 TW TW096108621A patent/TWI329373B/en active
-
2008
- 2008-02-21 US US12/071,422 patent/US7789546B2/en active Active
-
2010
- 2010-07-02 US US12/829,793 patent/US20100265106A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4714983A (en) * | 1985-06-10 | 1987-12-22 | Motorola, Inc. | Uniform emission backlight |
US5397867A (en) * | 1992-09-04 | 1995-03-14 | Lucas Industries, Inc. | Light distribution for illuminated keyboard switches and displays |
US20060114690A1 (en) * | 2004-11-26 | 2006-06-01 | Seiji Iki | Back-lighting unit and liquid crystal display using the same |
US20070086179A1 (en) * | 2005-10-14 | 2007-04-19 | Radiant Opto-Electronics Corporation | Light mixing plate and direct backlight module |
US7287891B1 (en) * | 2006-02-06 | 2007-10-30 | Samsung Electronics Co., Ltd. | Backlight assembly and display device having the same |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130265170A1 (en) * | 2012-04-06 | 2013-10-10 | Hon Hai Precision Industry Co., Ltd. | Indicating unit and electronic device using same |
Also Published As
Publication number | Publication date |
---|---|
TW200837991A (en) | 2008-09-16 |
US7789546B2 (en) | 2010-09-07 |
TWI329373B (en) | 2010-08-21 |
US20080225508A1 (en) | 2008-09-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7789546B2 (en) | Light-emitting device and electronic device using the same | |
US7239303B2 (en) | Keyboard structure | |
US8350172B2 (en) | Illuminated keyboard | |
US20060139905A1 (en) | Illuminating keyboards | |
US8313214B2 (en) | Double-sided LED lamp | |
JP2009076472A (en) | Illumination input device | |
JP2009290181A (en) | Diffusing lens and luminescent element assembly using the same | |
JPWO2006087863A1 (en) | Area lighting device | |
US20140226302A1 (en) | Luminescent keyboard and light-guide board thereof | |
JP3130331U (en) | Keypad light emitting assembly | |
TWI761024B (en) | Luminous keyboard and backlight module | |
US20080130263A1 (en) | Thin light-guiding structure and electronic device using the same | |
JP2005032703A (en) | Lighting device, and light input device | |
JP2008299116A (en) | Equipment | |
US8534853B2 (en) | Backlight module | |
US11371676B2 (en) | Keyboard device and backlight module thereof | |
CN101266039A (en) | Illuminating device and electronic device employing same | |
US20100002434A1 (en) | Illumination device | |
JPWO2008072666A1 (en) | Illuminated input device | |
TWI501278B (en) | Backlight apparatus and illuminated keyboard including such backlight apparatus | |
JP4959415B2 (en) | Light guide key sheet and light guide key sheet module | |
TWI835662B (en) | Ring-shaped light guide module and light emitting device | |
KR101021018B1 (en) | Omni-direction keypad lighting device using conic structure | |
JP4620142B2 (en) | Keypad device | |
KR101020899B1 (en) | Vertical couple lighting device for keypad using optical substrate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |