CN101004507A - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN101004507A CN101004507A CN 200610033237 CN200610033237A CN101004507A CN 101004507 A CN101004507 A CN 101004507A CN 200610033237 CN200610033237 CN 200610033237 CN 200610033237 A CN200610033237 A CN 200610033237A CN 101004507 A CN101004507 A CN 101004507A
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- module backlight
- light source
- framework
- backlight
- reflecting surface
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Abstract
A backlight module is prepared for forming frame by baseplate and multiple side wall connected with baseplate, arranging an opening on another end of multiple side wall, setting diffusion plate at said opening and a bulge on baseplate, arranging reflection surface at two side surfaces of bulge, setting two light source in internal side surfaces of two side walls opposite to two reflection surfaces and entering light beam from light sources into diffusion plate after said light beam is reflected by two reflection surfaces.
Description
[technical field]
The invention relates to a kind of module backlight, particularly about a kind of reflective module backlight.
[background technology]
Along with liquid crystal display (Liquid Crystal Display, LCD) industry is flourish, the product of various display panels use continue to increase, lighter and thinner product constantly weeds out the old and bring forth the new.Because display panels is non-self-luminosity display panel, therefore must be by module competence exertion Presentation Function backlight.
Module backlight is divided into two kinds of side-light type and straight-down negatives according to the light source position.The light source of side-light type module backlight is arranged at the side of backlight assembly, and it generally utilizes light guide plate that light source is converted to area source and is utilized, and light-emitting uniformity is better, but brightness is not high, generally is used for the display panels of portable electron device.The light source of down straight aphototropism mode set be arranged at display panels under, it has higher brightness, but light-emitting uniformity is relatively poor, is used for non-portable products such as desktop type liquid crystal indicator and LCD TV more.
See also Fig. 1, for improving the shortcoming of above-mentioned module backlight, prior art has disclosed a kind of hollow type module 10 backlight.This hollow type module 10 backlight comprises one first light guide plate 11, one second light guide plate 12, two sidelight sources 13, a reflector plate 14 and a diffuser plate 15.This first light guide plate 11 and the 12 relative spacing settings of second light guide plate, and form a hollow light guide zone 16 between it, the both sides of this hollow light guide zone 16 are located in this two sidelights source 13 respectively, it respectively comprises a plurality of fluorescent tubes 131 and a reflective lampshade 132, this reflector plate 14 is located at the outside surface 122 of second light guide plate 12, and this diffuser plate 15 is located at the outside surface 112 of first light guide plate 11.After the light of fluorescent tube 131 emissions enters hollow light guide zone 16, enter first light guide plate 11 and second light guide plate 12 respectively, wherein reflector plate 14 will enter the light reflected back hollow light guide zone 16 of second light guide plate 12, and enter first light guide plate 11, and the even emergent light of light diffusion back output that diffuser plate 15 is derived first light guide plate 11.
Yet, in this hollow type module 10 backlight, the use of first light guide plate 11 and second light guide plate 12 increases its cost and weight, and light guide plate is generally made by clear plastic, easily produce distortion, yellow and stress and problem such as concentrate, thereby influence the serviceable life of module backlight.In addition, the setting of hollow light guide zone 16 increases the thickness of module backlight.
[summary of the invention]
In view of above-mentioned condition, be necessary to provide a kind of brightness height, module backlight that light-emitting uniformity is good.
A kind of module backlight, it comprises a framework, at least two light sources and a diffuser plate, this framework has a plurality of sidewalls that a base plate and an end link to each other with this base plate, the other end of these a plurality of sidewalls forms an opening, diffuser plate is positioned at this frame openings place, and this chassis base is provided with a projection, and this projection has the two sides reflecting surface, this at least two light source is located at the framework two side inboard relative with this two sides reflecting surface, and its emitted light beams enters diffuser plate after this offside reflection face reflection.
Compare with prior art, described module backlight utilizes the offside reflection face towards light source of convexing to form on the chassis base, the light portion that light source sends directly enters diffuser plate, part enters diffuser plate after the reflection of offside reflection face, therefore shape by changing this offside reflection face and distribute with this offside reflection face light reflected of the adjustable warping of the relative position of light source does not adopt the light-emitting uniformity of light guide plate with regard to the adjustable backlight module; In addition, because described module backlight does not adopt light guide plate, thereby cost is lower, and weight is lighter, and thickness is less.
[description of drawings]
Fig. 1 is the diagrammatic cross-section of prior art hollow type module backlight.
Fig. 2 is the diagrammatic cross-section of the present invention's module preferred embodiment one backlight.
Fig. 3 is the light path synoptic diagram of module backlight shown in Figure 2.
Fig. 4 is the diagrammatic cross-section of the present invention's module preferred embodiment two backlight.
Fig. 5 is the diagrammatic cross-section of the present invention's module preferred embodiment three backlight.
Fig. 6 is the diagrammatic cross-section of the present invention's module preferred embodiment four backlight.
Fig. 7 is the diagrammatic cross-section of the present invention's module preferred embodiment five backlight.
[embodiment]
Below in conjunction with accompanying drawing and embodiment the present invention's module backlight is described in further detail.
See also Fig. 2, the module backlight 20 of preferred embodiment one of the present invention comprises a framework 21, a plurality of light source 22 and a diffuser plate 23.
This framework 21 has four sidewalls 212 that a base plate 211 and an end are connected in this base plate 211, and the other end of these four sidewalls 212 forms an opening 213, and diffuser plate 23 is located at this opening 213 places.This chassis base 211 is provided with a projection 214, this projection 214 has two sides reflecting surface 215, light source 22 is located at the inboard of framework 21 two side 2121 relative with these two sides reflecting surface 215 difference respectively, and the light of these light source 22 emissions evenly enters diffuser plate 23 after the reflection through this two sides reflecting surface 215.
In the present embodiment, this projection 214 is strip structure, and it is parallel with the two side 2121 that framework 21 is provided with light source 22, and two sides reflecting surface 215 that should projection 214 is the curved surface towards light source 22.
The upper end of this frame side wall 2121 has extended to form reflecting part 216 on, should go up reflecting part 216 from the center position of frame side wall 212 towards frame openings 213, and its side near light source 22 has a curved surface, and this curved surface forms a last reflecting surface 217 towards light source 22.And this frame side wall 2121 extends to form a following reflecting part 218 towards frame openings 213 directions with chassis base 211 junctions, this time reflecting part 218 has a following reflecting surface 219 towards light source 22, and this time reflecting surface 219 and last reflecting surface 217 are relative and link to each other with offside reflection face 215.The part light that this last reflecting part 216 can upwards send light source 22 reflexes to offside reflection face 215, after 215 reflections of offside reflection face, enter diffuser plate 23 again, thereby can prevent that this part light from directly entering the position of diffuser plate 23 near light source 22, make this regional exiting surface bright spot occur, influence light-emitting uniformity.
A plurality of light sources 22 can be light emitting diode or cathode fluorescent tube, and in the present embodiment, light source 22 is a light emitting diode, these a plurality of light emitting diodes along the line spread parallel with chassis base 211 in the inboard of frame side wall 2121.These a plurality of light emitting diodes can be fixed in the inboard of frame side wall 2121 by the sticker mode, also can be fixed on the circuit board 221 earlier, again circuit board 221 is fixed in the inboard of this frame side wall 2121, in such cases, generally reach to go up between reflecting surface 217 and the following reflecting surface 219 and be provided with a circuit board fixed part 210 in frame side wall 2121, circuit board 221 is fixed in this circuit board fixed part 210, thereby makes light source 22 between last reflecting surface 217 and following reflecting surface 219.In the present embodiment, light emitting diode is the inboard of being fixed in the frame side wall 2121 of framework 21 by the second way.
Be understandable that the present invention's module backlight also can be provided with other one or more optical sheets as the case may be, as prismatic lens or reflecting polarized wafer etc.In the present embodiment, module 20 backlight also comprises a prismatic lens 24 and a reflecting polarized wafer 25, and this prismatic lens 24 is positioned at the top of diffuser plate 23, and this reflecting polarized wafer 25 is positioned at the top of prismatic lens 24.
See also Fig. 3, it is the light path synoptic diagram of module backlight shown in Figure 2.The light of light source 22 emission, a part directly enters diffuser plate 23, a part via offside reflection face 215, go up reflecting surface 217 and enter diffuser plate 23 after reflecting surface 219 reflections down, via becoming even emergent light after diffuser plate 23 diffusions.
The offside reflection face 215 that this module 20 backlight utilizes the projection 214 on the chassis base 211 to form towards light source 22, the part light that this offside reflection face 215 can send light source 22 reflexes to diffuser plate 23, change offside reflection face 215 shape and with the relative position of light source 22, the distribution of adjustable side surface reflecting surface 215 reflection rays, thereby do not adopt light guide plate just can change the light-emitting uniformity of module 20 backlight, and this module 20 backlight also can increase or reduce the quantity of light source, to reach actual brightness requirement.
See also Fig. 4, it is for module backlight 30 diagrammatic cross-sections of preferred embodiment two of the present invention.This module 30 backlight is similar to module backlight 20, both differences be in: in the module 30 backlight, the two sides reflecting surface 315 of the projection 314 on the chassis base 311 is the plane, and this two sides reflecting surface 315 and the two sides reflecting surface 215 of module 20 protrusions 214 backlight have the effect of identical even reflection ray.
See also Fig. 5, it is for module backlight 40 diagrammatic cross-sections of preferred embodiment three of the present invention.This module 40 backlight is with the difference of module 20 backlight: in the module 40 backlight, the two sides reflecting surface 415 of the projection 414 on the chassis base 411 is stepped inclined-plane.
See also Fig. 6, it is for module backlight 50 diagrammatic cross-sections of preferred embodiment four of the present invention.This module 50 backlight is with the difference of module 20 backlight: the medial surface that module 50 backlight is provided with two frame side walls 5121 of light source 52 is the inclined-plane, light source 52 is with respect to this inclined-plane that is arranged at of chassis base 511 inclinations, and the angle of this inclined-plane and chassis base 511 is between 45 degree and 90 degree.For improving light-emitting uniformity, light source 52 can cooperate the shape of offside reflection face 515 to tilt or tilt to chassis base 511 to opening 513 directions, and its vergence direction and angle are identical respectively with respect to the vergence direction and the angle of chassis base 511 with the medial surface of frame side wall 5121.In the present embodiment, light source 52 tilts to chassis base 511.
See also Fig. 7, it is for module backlight 60 diagrammatic cross-sections of preferred embodiment five of the present invention.This module 60 backlight and module 20 backlight different be in: the light source 62 of module 60 backlight is cathode fluorescent tubes, its length direction is parallel with chassis base 611, this cathode fluorescent tube can singlely be arranged at the inboard of frame side wall 6121, also can be a plurality of parallel with the chassis base 611 successively from top to bottom inboard that is arranged at frame side wall 6121.The module backlight 60 of present embodiment is not owing to use light emitting diode, therefore frame side wall 6121 is not provided with the circuit board fixed part and reaches reflecting part down, and this frame side wall 6121 is a curved surface with the junction of chassis base 611, and the inboard of this curved surface and last reflecting part 616 and framework side plate 6121 forms a complete reflecting curved surface.
Be understandable that, in the present invention's module backlight, also can a plurality of light emitting diodes or cathode fluorescent tube be set in other frame side wall inboard of not establishing light source, establish position or the brightness that light source is adjusted these a plurality of light emitting diodes or cathode fluorescent tube by cooperating, further improved the light-emitting uniformity of module backlight; In addition, the present invention's module backlight also can adopt the plane framework base arrangement, and in conjunction with the reflecting plate of bulge-structure, replaces having the chassis base of bulge-structure.
Claims (12)
1. module backlight, it comprises a framework, at least two light sources and a diffuser plate, this framework has a plurality of sidewalls that a base plate and an end link to each other with this base plate, the other end of these a plurality of sidewalls forms an opening, diffuser plate is positioned at this frame openings place, it is characterized in that: this chassis base is provided with a projection, this projection has the two sides reflecting surface, this at least two light source is located at the framework two side inboard relative with this two sides reflecting surface, and its emitted light beams enters diffuser plate after this offside reflection face reflection.
2. module backlight as claimed in claim 1 is characterized in that: the sidewall upper that described framework is provided with light source extends to form the last reflecting part towards the frame openings center position, and it has a last reflecting surface towards light source.
3. module backlight as claimed in claim 1 is characterized in that: the junction that described framework is provided with the sidewall of light source and chassis base extends to form the following reflecting part towards the frame openings direction, and this time reflecting part has a following reflecting surface towards light source.
4. module backlight as claimed in claim 1 is characterized in that: described projection is a strip structure, and itself and framework are provided with the parallel sidewalls of light source.
5. module backlight as claimed in claim 4 is characterized in that: the two sides reflecting surface of described projection is a curved surface.
6. module backlight as claimed in claim 4 is characterized in that: the two sides reflecting surface of described projection is the plane.
7. module backlight as claimed in claim 4 is characterized in that: the two sides reflecting surface of described projection is stepped inclined-plane.
8. module backlight as claimed in claim 1 is characterized in that: described light source comprises a plurality of light emitting diodes or cathode fluorescent tube.
9. module backlight as claimed in claim 8 is characterized in that: described light emitting diode is pasted on the inside sidewalls of framework by colloid.
10. module backlight as claimed in claim 8 is characterized in that: described light emitting diode is fixed by a circuit board that is fixed in the frame side wall inboard.
11. module backlight as claimed in claim 1 is characterized in that: the medial surface that described framework is provided with the sidewall of light source is the inclined-plane, and the angle of this inclined-plane and chassis base is between 45 degree and 90 degree.
12. module backlight as claimed in claim 1 is characterized in that: described module backlight also comprises a blast sheet and a reflecting polarized wafer, and this blast sheet is positioned at the top of diffuser plate, and this reflecting polarized wafer is positioned at the top of blast sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100332375A CN100468161C (en) | 2006-01-21 | 2006-01-21 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100332375A CN100468161C (en) | 2006-01-21 | 2006-01-21 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101004507A true CN101004507A (en) | 2007-07-25 |
| CN100468161C CN100468161C (en) | 2009-03-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100332375A Expired - Fee Related CN100468161C (en) | 2006-01-21 | 2006-01-21 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100468161C (en) |
Cited By (17)
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|---|---|---|---|---|
| CN102374449A (en) * | 2010-08-09 | 2012-03-14 | 荣晋精密科技股份有限公司 | Light-emitting unit and backlight module comprising same |
| CN102518992A (en) * | 2011-12-15 | 2012-06-27 | Tcl光电科技(惠州)有限公司 | Backlight module without light guide plate and LCD (liquid crystal display) device |
| CN102620208A (en) * | 2012-03-29 | 2012-08-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN103000094A (en) * | 2012-02-28 | 2013-03-27 | 天地融科技股份有限公司 | Electronic device |
| CN103123073A (en) * | 2011-11-21 | 2013-05-29 | 青岛海尔电子有限公司 | Backlight module and liquid crystal display device utilizing backlight module |
| CN103123072A (en) * | 2011-11-21 | 2013-05-29 | 青岛海尔电子有限公司 | Backlight module and liquid crystal display device utilizing backlight module |
| CN103309084A (en) * | 2012-03-14 | 2013-09-18 | 三星显示有限公司 | Display device |
| CN103912823A (en) * | 2013-01-03 | 2014-07-09 | 三星显示有限公司 | Backlight assembly and a display device using the same |
| CN104541097A (en) * | 2012-08-07 | 2015-04-22 | 恩普乐股份有限公司 | Surface light source device and display device |
| CN104992625A (en) * | 2010-04-20 | 2015-10-21 | 三星电子株式会社 | Display apparatus |
| CN107399138A (en) * | 2017-07-05 | 2017-11-28 | 中航华东光电有限公司 | The optical film group of light and thin type |
| CN108897166A (en) * | 2018-07-19 | 2018-11-27 | 东莞市豪顺精密科技有限公司 | A kind of side entrance back module that realizing HDR subregion and liquid crystal display device |
| CN109448551A (en) * | 2018-11-16 | 2019-03-08 | 维沃移动通信有限公司 | Terminal device |
| CN110515236A (en) * | 2019-08-20 | 2019-11-29 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| US11061281B2 (en) | 2019-08-20 | 2021-07-13 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| CN115078260A (en) * | 2022-08-23 | 2022-09-20 | 常州奥智高分子集团股份有限公司 | Diffuser plate AOI detection device |
| WO2023246953A1 (en) * | 2022-06-23 | 2023-12-28 | 伟时电子股份有限公司 | Backlight module, and display device with same |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000214460A (en) * | 1999-01-25 | 2000-08-04 | Sharp Corp | Back light device |
| CN1265236C (en) * | 2003-02-17 | 2006-07-19 | 友达光电股份有限公司 | Backlight module |
-
2006
- 2006-01-21 CN CNB2006100332375A patent/CN100468161C/en not_active Expired - Fee Related
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| CN104992625B (en) * | 2010-04-20 | 2018-06-05 | 三星电子株式会社 | Display device |
| CN104992625A (en) * | 2010-04-20 | 2015-10-21 | 三星电子株式会社 | Display apparatus |
| CN102374449A (en) * | 2010-08-09 | 2012-03-14 | 荣晋精密科技股份有限公司 | Light-emitting unit and backlight module comprising same |
| CN103123072B (en) * | 2011-11-21 | 2016-03-09 | 青岛海尔电子有限公司 | Backlight module and apply its liquid crystal display |
| CN103123073A (en) * | 2011-11-21 | 2013-05-29 | 青岛海尔电子有限公司 | Backlight module and liquid crystal display device utilizing backlight module |
| CN103123072A (en) * | 2011-11-21 | 2013-05-29 | 青岛海尔电子有限公司 | Backlight module and liquid crystal display device utilizing backlight module |
| CN102518992B (en) * | 2011-12-15 | 2014-08-13 | Tcl光电科技(惠州)有限公司 | Backlight module without light guide plate and LCD (liquid crystal display) device |
| CN102518992A (en) * | 2011-12-15 | 2012-06-27 | Tcl光电科技(惠州)有限公司 | Backlight module without light guide plate and LCD (liquid crystal display) device |
| CN103218955B (en) * | 2012-02-28 | 2015-10-28 | 天地融科技股份有限公司 | A kind of electronic equipment |
| CN103218955A (en) * | 2012-02-28 | 2013-07-24 | 天地融科技股份有限公司 | Electronic device |
| CN103000094A (en) * | 2012-02-28 | 2013-03-27 | 天地融科技股份有限公司 | Electronic device |
| CN103217833A (en) * | 2012-02-28 | 2013-07-24 | 天地融科技股份有限公司 | Electronic device |
| CN103309084B (en) * | 2012-03-14 | 2018-05-11 | 三星显示有限公司 | Display device |
| US10551030B2 (en) | 2012-03-14 | 2020-02-04 | Samsung Display Co., Ltd. | Display device comprising the same |
| CN103309084A (en) * | 2012-03-14 | 2013-09-18 | 三星显示有限公司 | Display device |
| US9752753B2 (en) | 2012-03-14 | 2017-09-05 | Samsung Display Co., Ltd. | Display device comprising the same |
| WO2013143161A1 (en) * | 2012-03-29 | 2013-10-03 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102620208A (en) * | 2012-03-29 | 2012-08-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN104541097B (en) * | 2012-08-07 | 2017-04-05 | 恩普乐股份有限公司 | Planar light source device and display device |
| CN104541097A (en) * | 2012-08-07 | 2015-04-22 | 恩普乐股份有限公司 | Surface light source device and display device |
| CN103912823A (en) * | 2013-01-03 | 2014-07-09 | 三星显示有限公司 | Backlight assembly and a display device using the same |
| CN107399138A (en) * | 2017-07-05 | 2017-11-28 | 中航华东光电有限公司 | The optical film group of light and thin type |
| CN108897166A (en) * | 2018-07-19 | 2018-11-27 | 东莞市豪顺精密科技有限公司 | A kind of side entrance back module that realizing HDR subregion and liquid crystal display device |
| CN108897166B (en) * | 2018-07-19 | 2021-06-04 | 东莞市豪顺精密科技有限公司 | Side-in backlight module for realizing HDR partition and liquid crystal display device |
| CN109448551A (en) * | 2018-11-16 | 2019-03-08 | 维沃移动通信有限公司 | Terminal device |
| CN110515236A (en) * | 2019-08-20 | 2019-11-29 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| US11061281B2 (en) | 2019-08-20 | 2021-07-13 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
| WO2023246953A1 (en) * | 2022-06-23 | 2023-12-28 | 伟时电子股份有限公司 | Backlight module, and display device with same |
| CN115078260A (en) * | 2022-08-23 | 2022-09-20 | 常州奥智高分子集团股份有限公司 | Diffuser plate AOI detection device |
| CN115078260B (en) * | 2022-08-23 | 2022-10-28 | 常州奥智高分子集团股份有限公司 | Diffuser plate AOI detection device |
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| CN100468161C (en) | 2009-03-11 |
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Granted publication date: 20090311 Termination date: 20140121 |