CN201110928Y - Circuit board and back light source - Google Patents
Circuit board and back light source Download PDFInfo
- Publication number
- CN201110928Y CN201110928Y CNU2007201705293U CN200720170529U CN201110928Y CN 201110928 Y CN201110928 Y CN 201110928Y CN U2007201705293 U CNU2007201705293 U CN U2007201705293U CN 200720170529 U CN200720170529 U CN 200720170529U CN 201110928 Y CN201110928 Y CN 201110928Y
- Authority
- CN
- China
- Prior art keywords
- light
- wiring board
- pointolite
- backlight
- circuit board
- 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.)
- Expired - Lifetime
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Abstract
The utility model discloses a circuit board; a point light source is arranged on one side surface of the circuit board; a light absorption material layer is arranged on the side surface of the circuit board, between the light outlet of the point light source and the circuit board edge which is relatively vertical to the light outlet. The utility model also discloses a backlight using the circuit board. The circuit board of the utility model enables uniform brightness of the beams radiated into the incidence surface of a backlight module group to improve the luminous effect.
Description
[technical field]
The utility model relates to field of liquid crystal, is specifically related to a kind of backlight that can improve the wiring board of backlight luminescence effect and adopt this wiring board.
[background technology]
As the white light type backlight of small-medium size colour liquid crystal display device, adopt LED (light emitting diode) usually as light emitting source.As depicted in figs. 1 and 2, after by pad 30 LED 13 being welded to circuit board 12 (adopting flexible circuit board usually) and going up, refill on the module 11 backlight and form backlight.Light emitting source can be divided into pointolite and line source, existing backlight generally adopts the LED pointolite, to obtain uniform luminous effect at the visible area 111 of module 11 backlight, just must guarantee to reach certain distance the most nearby from the light-emitting window of LED to viewing area backlight.Because the characteristic of pointolite and the restriction of module backlight 11 structures, and the light-emitting window of LED is close on the incidence surface of light guide plate, make the LED pointolite shorter apart from the distance L the most nearby 1 of the viewing area of module backlight, send and enter into than short-circuit line the light of light guide plate by distance from the LED pointolite, it is luminous to have little time to be shattered into uniform in-plane, this influences the illumination effect of backlight just easily in the part generation bright spot of close the light source of LCD visible area.
[summary of the invention]
The purpose of this utility model solves the problems of the prior art exactly, and a kind of wiring board of the LED of having pointolite is provided, and makes the light luminance of the visible area that incides module backlight even.
Another purpose of the present utility model provides a kind of backlight, alleviates the bright spot on close the Lights section of LCD visible area.
For achieving the above object, the utility model provides a kind of wiring board, and the side plate face of described wiring board is provided with pointolite, on this lateral plates, have the light absorbent layer at the light-emitting window of described pointolite between perpendicular relative described wiring board edge.
In preferred version, described pointolite is a light emitting diode, described light absorbent layer be parallel to length on the light emitting diode direction be equal to or greater than the width of described light emitting diode light-emitting window and described light absorbent layer and light emitting diode light-emitting window over against.
Described wiring board is a flexible circuit board, the black ink layer that described light absorbent layer is a silk-screen or other dark colour ink lay.
For achieving the above object, the utility model also provides a kind of backlight, comprise module backlight and the wiring board that is used to provide light source, described module backlight comprises light guide plate and blooming piece, described light guide plate has incidence surface, exiting surface and reflecting surface, described blooming piece covers on the exiting surface of described light guide plate, the side plate face of described wiring board is provided with pointolite, the light-emitting window of described pointolite is towards the incidence surface of also close described light guide plate, on this lateral plates of described wiring board, light-emitting window at described pointolite has the light absorbent layer between perpendicular relative described wiring board edge, and described light absorbent aspect is to the exiting surface or the reflecting surface of described light guide plate.
The utility model beneficial effect compared with prior art is:
1, the light-emitting window of the utility model pointolite in the circuit board has the light absorbent layer between perpendicular relative described wiring board edge, this wiring board is applied in the module backlight, the light absorbent aspect is to the exiting surface or the reflecting surface of light guide plate, the shortest because of putting between the line vertical range, intensity maximum with the light of this part acquisition of the vertically opposite incidence surface of light-emitting window, so can utilize the light absorbent layer to absorb the intensity of this part light, thereby the intensity of this part light is reduced, finally make the light luminance homogenising of the visible area that incides module backlight, improve the backlight luminescence effect, avoid since pointolite and framed structure backlight former thus near the light source of LCD visible area part produce bright spot.
2, light absorbent preferably adopts black ink, the extinction best results.
3, the utility model is simple, and cost of manufacture is low.
[description of drawings]
Fig. 1 is the existing synoptic diagram of flexible PCB backlight in module backlight;
Fig. 2 is existing flexible PCB synoptic diagram backlight;
Fig. 3 is the flexible PCB synoptic diagram of the utility model embodiment;
Fig. 4 is that flexible PCB of the present utility model is assembled to the structural representation on the light guide plate.
Feature of the present utility model and advantage will be elaborated in conjunction with the accompanying drawings by embodiment.
[embodiment]
Backlight comprises flexible circuit board and the module backlight that is used to provide light source, module backlight comprises light guide plate and blooming piece, light guide plate is tabular, light guide plate has incidence surface, be used for irradiant exiting surface and be used to reflect the reflecting surface of the light of injecting from incidence surface, an one narrow side is an incidence surface, and the broad side surface that one and incidence surface intersect is an exiting surface, and relative with exiting surface is reflecting surface, reflecting surface is made into the site face usually, and blooming piece covers on the exiting surface of light guide plate.The side plate face of flexible circuit board is provided with the LED pointolite, on this lateral plates of described wiring board, have the light absorbent layer, the preferred black ink layer of light absorbent layer at the light-emitting window of described pointolite between perpendicular relative described wiring board edge.For with LED as for the white light of the pointolite module backlight, the surface color that LED attaches the flexible circuit board of a side can directly have influence on final illumination effect.Therefore do not go back white ink layer 31 on the silk-screen in the zone outside described light absorbent layer in the subsides LED of flexible PCB 12 side, the luminous energy that LED is sent is injected in the module light guide plate backlight as far as possible insusceptibly.
Be illustrated in figure 3 as the structural representation of flexible circuit board 12, on the side plate face of flexible circuit board 12 subsides LED13, comprise some to being used to weld the pad 30 of LED, LED is welded on the pad, one edge of its light-emitting window 131 subtend flexible circuit board, each to LED pad 30 and and its this vertically opposite marginal portion between black ink layer 32 on the silk-screen, black ink layer 32 with described each pad 30 is arranged correspondingly, and on the center line that is centered close to every pair of pad 30 of black ink layer 32, thus make black ink layer 32 and the light-emitting window that is welded on the LED on the pad 30 can over against.
Be illustrated in figure 4 as the structural representation when being assembled into flexible circuit board on the light guide plate, the light-emitting window of LED13 is towards the incidence surface 141 of also close light guide plate 14, preferred mode is, the LED light-emitting window is close to the incidence surface of light guide plate, black ink layer 32 is in the face of the exiting surface of described light guide plate 14, and perhaps black ink layer is in the face of the reflecting surface of described light guide plate.
Send and enter into the light of light guide plate than short-circuit line from the LED pointolite by distance, luminous because black ink 32 light-absorbing action intensities are weakened even light has little time to be shattered into uniform in-plane, also can eliminate or alleviate bright spot effectively.Present embodiment is simple, need not add other costs except that black ink.
Because of the light-emitting window of LED has certain width, so the length of black ink layer 32 on the direction parallel with LED preferably is equal to or greater than the width of light-emitting window, so that module incidence surface each several part backlight receives brightness light uniformly.
Similarly, at other dark colour printing ink of local silk-screen of silk-screen black ink, also can play the effect of eliminating or alleviating bright spot.In addition, use other color ink can also suitably change the background color of module backlight luminous zone, obtain the illumination effect of different colour casts with simple and easy realization different background colors backlight.
The utility model improves backlight luminescence by arrange light absorbent such as ink for screen printing on flexible PCB, and effective, method is simple, and is with low cost.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; under the prerequisite that does not break away from the utility model design; can also make some simple deduction or replace; all should be considered as belonging to protection domain of the present utility model; for example flexible circuit board can also replace with common wiring board, and the LED pointolite also can replace with other pointolite.
Claims (6)
1. wiring board, the side plate face of described wiring board is provided with pointolite, it is characterized in that: on this lateral plates, have the light absorbent layer at the light-emitting window of described pointolite between perpendicular relative described wiring board edge.
2. wiring board as claimed in claim 1, it is characterized in that: described pointolite is a light emitting diode, described light absorbent layer be parallel to length on the light emitting diode direction be equal to or greater than the width of described light emitting diode light-emitting window and described light absorbent layer and light emitting diode light-emitting window over against.
3. wiring board as claimed in claim 2 is characterized in that: described wiring board is a flexible circuit board, the black ink layer that described light absorbent layer is a silk-screen or other dark colour ink lay.
4. backlight, comprise module backlight and the wiring board that is used to provide light source, described module backlight comprises light guide plate and blooming piece, described light guide plate has incidence surface, exiting surface and reflecting surface, described blooming piece covers on the exiting surface of described light guide plate, the side plate face of described wiring board is provided with pointolite, the light-emitting window of described pointolite is towards the incidence surface of also close described light guide plate, it is characterized in that: on this lateral plates of described wiring board, light-emitting window at described pointolite has the light absorbent layer between perpendicular relative described wiring board edge, and described light absorbent aspect is to the exiting surface or the reflecting surface of described light guide plate.
5. backlight as claimed in claim 4, it is characterized in that: described pointolite is a light emitting diode, described light absorbent layer be parallel to length on the light emitting diode direction be equal to or greater than the width of described light emitting diode light-emitting window and described light absorbent layer and light emitting diode light-emitting window over against.
6. backlight as claimed in claim 5 is characterized in that: described wiring board is a flexible circuit board, the black ink layer that described light absorbent layer is a silk-screen or other dark colour ink lay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201705293U CN201110928Y (en) | 2007-11-02 | 2007-11-02 | Circuit board and back light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201705293U CN201110928Y (en) | 2007-11-02 | 2007-11-02 | Circuit board and back light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201110928Y true CN201110928Y (en) | 2008-09-03 |
Family
ID=39895465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201705293U Expired - Lifetime CN201110928Y (en) | 2007-11-02 | 2007-11-02 | Circuit board and back light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201110928Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104822A (en) * | 2011-11-15 | 2013-05-15 | 敦南科技（无锡）有限公司 | Illuminant assembly |
| WO2013143225A1 (en) * | 2012-03-27 | 2013-10-03 | 深圳市华星光电技术有限公司 | Edge-lighting type backlight module and liquid crystal display thereof |
| CN103486492A (en) * | 2012-06-13 | 2014-01-01 | 群康科技(深圳)有限公司 | Display and backlight module and light source module thereof |
| CN104914620A (en) * | 2015-06-02 | 2015-09-16 | 武汉华星光电技术有限公司 | Light bar and backlight module |
| TWI509189B (en) * | 2012-06-13 | 2015-11-21 | Innocom Tech Shenzhen Co Ltd | Display and backlight module and lighting module thereof |
-
2007
- 2007-11-02 CN CNU2007201705293U patent/CN201110928Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103104822A (en) * | 2011-11-15 | 2013-05-15 | 敦南科技（无锡）有限公司 | Illuminant assembly |
| CN103104822B (en) * | 2011-11-15 | 2016-01-20 | 敦南科技（无锡）有限公司 | A kind of light source assembly |
| WO2013143225A1 (en) * | 2012-03-27 | 2013-10-03 | 深圳市华星光电技术有限公司 | Edge-lighting type backlight module and liquid crystal display thereof |
| CN103486492A (en) * | 2012-06-13 | 2014-01-01 | 群康科技(深圳)有限公司 | Display and backlight module and light source module thereof |
| TWI509189B (en) * | 2012-06-13 | 2015-11-21 | Innocom Tech Shenzhen Co Ltd | Display and backlight module and lighting module thereof |
| CN103486492B (en) * | 2012-06-13 | 2017-01-18 | 群康科技(深圳)有限公司 | Display and backlight module and light source module thereof |
| CN104914620A (en) * | 2015-06-02 | 2015-09-16 | 武汉华星光电技术有限公司 | Light bar and backlight module |
| CN104914620B (en) * | 2015-06-02 | 2019-01-15 | 武汉华星光电技术有限公司 | Lamp bar and backlight module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN BYD ELECTRONIC COMPONENT CO., LTD. Free format text: FORMER OWNER: BIYADI CO., LTD. Effective date: 20150902 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150902 Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: Shenzhen BYD Electronic Component Co., Ltd. Address before: Kwai Chung town Yanan Road, BYD Industrial Park in Longgang District of Shenzhen City, Guangdong province 518119 Patentee before: Biyadi Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080903 |