CN101435945A - Backlight source of liquid crystal display - Google Patents
Backlight source of liquid crystal display Download PDFInfo
- Publication number
- CN101435945A CN101435945A CNA2007100481232A CN200710048123A CN101435945A CN 101435945 A CN101435945 A CN 101435945A CN A2007100481232 A CNA2007100481232 A CN A2007100481232A CN 200710048123 A CN200710048123 A CN 200710048123A CN 101435945 A CN101435945 A CN 101435945A
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- guide plate
- light guide
- light
- backlight
- backlight source
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Abstract
The invention provides a backlight source of a liquid crystal display. The backlight source can effectively utilize light and avoid using an expensive optical brightening film and has a simple structure and convenient assembly. In order to realize the aim, the backlight source adopts the following technical proposal: the backlight source of the liquid crystal display comprises a light guide plate, light sources, reflecting films, rabbets and a diffusion film; the bottom of the light guide plate is stuck with the reflecting films and is provided with a plurality of the rabbets; the light sources are arranged in the rabbets; the top parts of the rabbets are provided with the notch reflecting films; and the top part of the light guide plate is provided with the diffusion film. The technical proposal improves the utilization efficiency of light, greatly reduces energy consumption of LCD, reduces the whole thickness of a backlight source module in order that a high-brightness thin backlight source becomes possible and further reduces the width of the front edge of the backlight module.
Description
Technical field
The present invention relates to the colour liquid crystal display device device, further relate to the used backlight arrangement of this liquid crystal display device.
Background technology
At present, be used for Backlight For Liquid Crystal Display Panels and mainly divide two kinds: marginal mode and straight-down negative.Its advantage of marginal mode backlight is that fluorescent tube is few, slimming, and the light extraction efficiency height, power consumption is little etc.Fig. 1 is the sectional view of marginal mode backlight.As shown in Figure 1, general marginal mode backlight is by fluorescent tube 13, reflex housing 14 (posting reflectance coating on the inwall), light guide plate 11 (bottom surface is printed on reflection graphic patterns), reflection diaphragm 12, compositions such as diffusion barrier sheet 15 and optical brightening diaphragm 16.The light part of fluorescent tube outgoing directly enters light guide plate, and a part enters light guide plate after reflecting through the reflectance coating on the lamp tube cover.The reflection graphic patterns that irradiate light is printed on the light guide plate, through the upwards diffusion of reflection graphic patterns, light penetrates light guide plate, thereby forms light source.Because the light guide plate bottom surface is printed with reflection graphic patterns, so need it be atomized by diffusion barrier sheet.And then, reached needed brightness by the optical brightening diaphragm.
Fig. 2 is the sectional view of direct-light-type backlight.The advantage of direct-light-type backlight is the brightness height, lighting and simple in structure etc.As shown in Figure 1, general direct-light-type backlight is by fluorescent tube 22, support 23, reflection diaphragm 21, compositions such as diffuser plate 24 and optical brightening diaphragm 25.The light part of fluorescent tube outgoing directly enters diffuser plate, and a part is reflected and enters diffuser plate after diaphragm reflects.Light forms light source after spreading through diffuser plate.And then, reached needed high brightness by the optical brightening diaphragm.
The marginal mode backlight is owing to be subjected to the restriction of fluorescent tube quantity, and its brightness also is subjected to certain restriction.In order to reach required high brightness, sometimes, have to use expensive optical brightening diaphragm.In addition, marginal mode back light source structure complexity assembles also comparatively loaded down with trivial details.
Direct-light-type backlight draws in order to prevent the fluorescent tube nurse, must use diffuser plate, and this makes the light extraction efficiency of direct-light-type backlight reduce.In addition, the distance between control fluorescent tube and the diffuser plate also is to prevent one of method that the fluorescent tube nurse draws.But this has also had influence on the integral thickness of module.
Summary of the invention
In order to solve above-mentioned defective of the prior art, the invention provides a kind of backlight of LCD, the light more efficient use can be got up, avoid using expensive optical brightening diaphragm, and also simple in structure, easy to assembly.
To achieve these goals, the present invention has adopted following technical scheme: backlight of LCD comprises light guide plate, light source, reflection diaphragm, also comprises notch, diffusion barrier sheet, attach reflection diaphragm and a plurality of notches are set in the light guide plate bottom, light source is arranged in the notch, at the notch top notch reflection diaphragm is set, diffusion barrier sheet is set at the light guide plate top.
The reflection graphic patterns of light guide plate is arranged on the bottom surface of light guide plate and the bottom surface of notch.Light source is CCFL fluorescent tube or LED fluorescent tube.Light guide plate is spliced light guide plate.
L type light guide plate and rectangle light guide plate are used in spliced light guide plate both sides, and L type light guide plate is used in middle L type light guide plate or the both sides of using, the middle T type light guide plate of using.
Both sides attach the side reflection diaphragm.The light source reflecting housing of U-shaped is set in the light guide plate both sides, in described light source reflecting housing, light source is set.
Adopt technical scheme of the present invention, easy to assembly, and needn't use expensive optical brightening diaphragm.Improve the utilization ratio of light, greatly reduced the energy consumption of LCD.Reduce the integral thickness of backlight module, made the backlight of high brightness slimming become possibility, and further reduced the margo frontalis width of backlight module.
Description of drawings
The ordinary construction synoptic diagram of peripheral type backlight in Fig. 1 prior art.
The ordinary construction synoptic diagram of direct-lighting backlight in Fig. 2 prior art.
Fig. 3 embodiment of the invention 1 organigram.
Spliced light guide plate 1 organigram of Fig. 4.
Spliced light guide plate 2 organigrams of Fig. 5.
Fig. 6 embodiment of the invention 2 organigrams.
Embodiment
Specify the specific embodiment of the present invention below in conjunction with accompanying drawing.
Embodiment 1
Shown in Figure 3 is the sectional view of first kind of backlight model of the present invention.This structure of models is by light guide plate 31, light source 33, reflection diaphragm 35, compositions such as side reflection diaphragm 36 and diffusion barrier sheet 34.Light guide plate 31 is light guide plate of specially-shaped, and light source 33 is placed in the notch 32, and light guide plate 31 both sides are pasted with side reflection diaphragm 36.According to the brightness needs, select quantity of light source for use, and the quantity of corresponding light guide plate notch.In order to prevent that the phenomenon of bright line from appearring in the zone directly over the light source 33, so the groove on notch 32 is pasted with notch reflection diaphragm 37, carries out shading treatment.The reflection graphic patterns of light guide plate 31 is arranged on the bottom surface of light guide plate 31 and the bottom surface of notch 32.Enter light guide plate 31 after the light L2 outgoing, after the diffusion of the reflection graphic patterns of process bottom surface of light guide plate, light L2 is from light guide plate 31 outgoing.Enter light guide plate 31 after the light L1 outgoing, at several secondary reflections of light guide plate 31 inner processes, shine on the reflection graphic patterns at notch 32 places, through after the diffusion of reflection graphic patterns, light L1 is from light guide plate 31 outgoing.From the light of light guide plate 31 outgoing,, can access the area source of homogeneous through after the atomizing of diffusion barrier sheet 34.And then, can use the optical brightening diaphragm to reach needed higher brightness.
The light guide plate of the trough of belt mouth that uses in this model also can be used spliced light guide plate, as shown in Figure 4 and Figure 5.Shown in Figure 4, L type light guide plate and rectangle light guide plate are used in the spliced light guide plate both sides of using in this model, the middle L type light guide plate of using.Shown in Figure 5, L type light guide plate is used in the spliced light guide plate both sides of using in this model, the middle T type light guide plate of using.
Use so spliced light guide plate, be tantamount to the light guide plate of trough of belt mouth on the optical characteristics, the printing of reflection graphic patterns is also fairly simple.
Embodiment 2
Shown in Figure 6 is another kind of backlight model sectional view of the present invention, and this model combines the design feature of marginal mode backlight and direct-light-type backlight.This structure of models is by light guide plate 31, light source 33, reflection diaphragm 35, compositions such as light source reflecting housing 66 and diffusion barrier sheet 34.Light guide plate 31 is light guide plate of specially-shaped, and a part of light source 33 is placed on notch 32 places, and the both sides of light guide plate 31 also are equipped with the fluorescent tube as light source 33.According to the brightness needs, select light source 33 quantity for use, and the quantity of corresponding light guide plate notch.In order to prevent that the phenomenon of bright line from appearring in the zone directly over the light source 33, so the groove on notch 32 is pasted with notch reflection diaphragm 37, carries out shading treatment.The reflection graphic patterns of light guide plate 31 is arranged on the bottom surface of light guide plate 31 and the bottom surface of notch 32.Enter light guide plate 31 after the light L2 outgoing, after the diffusion of the reflection graphic patterns of process light guide plate 31 bottom surfaces, light L2 is from light guide plate 31 outgoing.Enter light guide plate 31 after the light L1 outgoing, at several secondary reflections of light guide plate 31 inner processes, shine on the reflection graphic patterns at notch 32 places, through after the diffusion of reflection graphic patterns, light L1 is from light guide plate 31 outgoing.From the light of light guide plate 31 outgoing,, can access the area source of homogeneous through after the atomizing of diffusion barrier sheet 34.And then, can use the optical brightening diaphragm to reach needed higher brightness.
Claims (8)
1, a kind of backlight of LCD, comprise light guide plate (31), light source (33), reflection diaphragm (35), it is characterized in that, also comprise notch (32), diffusion barrier sheet (34), attach reflection diaphragm (35) and a plurality of notches (32) are set in light guide plate (31) bottom, light source (33) is arranged in the notch (32), at notch (32) top notch reflection diaphragm (37) is set, and at light guide plate (31) top diffusion barrier sheet (34) is set.
2, backlight of LCD as claimed in claim 1 is characterized in that, the reflection graphic patterns of light guide plate (31) is arranged on the bottom surface of light guide plate (31) and the bottom surface of notch (32).
3, backlight of LCD as claimed in claim 1 is characterized in that, light source (33) is CCFL fluorescent tube or LED fluorescent tube.
4, backlight of LCD as claimed in claim 1 is characterized in that, light guide plate (31) is spliced light guide plate.
5, backlight of LCD as claimed in claim 4 is characterized in that, L type light guide plate and rectangle light guide plate are used in described spliced light guide plate both sides, the middle L type light guide plate of using.
6, backlight of LCD as claimed in claim 4 is characterized in that, L type light guide plate is used in described spliced light guide plate both sides, the middle T type light guide plate of using.
7, backlight of LCD as claimed in claim 1 is characterized in that, attaches side reflection diaphragm (36) in light guide plate (31) both sides.
8, backlight of LCD as claimed in claim 1 is characterized in that, the light source reflecting housing (66) of U-shaped is set in light guide plate (31) both sides, and light source (33) is set in described light source reflecting housing (66).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100481232A CN101435945A (en) | 2007-11-13 | 2007-11-13 | Backlight source of liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100481232A CN101435945A (en) | 2007-11-13 | 2007-11-13 | Backlight source of liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101435945A true CN101435945A (en) | 2009-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100481232A Pending CN101435945A (en) | 2007-11-13 | 2007-11-13 | Backlight source of liquid crystal display |
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| CN (1) | CN101435945A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968185A (en) * | 2010-07-30 | 2011-02-09 | 南京中电熊猫液晶显示科技有限公司 | Thin-type LED (Light-Emitting Diode) backlight source |
| CN102566139A (en) * | 2010-12-28 | 2012-07-11 | 歌尔声学股份有限公司 | LED (Light-Emitting Diode) backlight display equipment |
| CN102620211A (en) * | 2012-04-05 | 2012-08-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN107315278A (en) * | 2017-07-14 | 2017-11-03 | 深圳市英达通电子有限公司 | A kind of production method of Ultrathin high-brightness LED backlight |
| CN108873431A (en) * | 2018-07-03 | 2018-11-23 | 浙江锦浩光电材料有限公司 | It is a kind of to facilitate installation and reflectance coating and backlight module with heat sinking function |
| CN111465895A (en) * | 2018-11-22 | 2020-07-28 | 瑞仪(广州)光电子器件有限公司 | Light-emitting mechanism and backlight module |
| CN111694087A (en) * | 2020-07-15 | 2020-09-22 | 惠科股份有限公司 | Backlight module and display device |
-
2007
- 2007-11-13 CN CNA2007100481232A patent/CN101435945A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968185A (en) * | 2010-07-30 | 2011-02-09 | 南京中电熊猫液晶显示科技有限公司 | Thin-type LED (Light-Emitting Diode) backlight source |
| CN102566139A (en) * | 2010-12-28 | 2012-07-11 | 歌尔声学股份有限公司 | LED (Light-Emitting Diode) backlight display equipment |
| CN102620211A (en) * | 2012-04-05 | 2012-08-01 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN107315278A (en) * | 2017-07-14 | 2017-11-03 | 深圳市英达通电子有限公司 | A kind of production method of Ultrathin high-brightness LED backlight |
| CN107315278B (en) * | 2017-07-14 | 2023-03-31 | 深圳市英达通电子有限公司 | Production method of ultrathin high-brightness LED backlight |
| CN108873431A (en) * | 2018-07-03 | 2018-11-23 | 浙江锦浩光电材料有限公司 | It is a kind of to facilitate installation and reflectance coating and backlight module with heat sinking function |
| CN111465895A (en) * | 2018-11-22 | 2020-07-28 | 瑞仪(广州)光电子器件有限公司 | Light-emitting mechanism and backlight module |
| CN111465895B (en) * | 2018-11-22 | 2023-01-24 | 瑞仪(广州)光电子器件有限公司 | Light-emitting mechanism and backlight module |
| CN111694087A (en) * | 2020-07-15 | 2020-09-22 | 惠科股份有限公司 | Backlight module and display device |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ZHONGHANG OPTOELECTRONICS CO., LTD. Free format text: FORMER OWNER: SHANGHAI SVA NEC LIQUID CRYSTAL DISPLAY CO., LTD. Effective date: 20100325 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201108 NO.3388, HUANING ROAD, MINHANG DISTRICT, SHANGHAI CITY TO: 201108 NO.3388, HUANING ROAD, SHANGHAI CITY |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20100325 Address after: 201108 Shanghai City Huaning Road No. 3388 Applicant after: Shanghai AVIC Optoelectronics Co., Ltd. Address before: 201108 Shanghai city Minhang District Huaning Road No. 3388 Applicant before: Shanghai SVA-NEC Liquid Crystal Display Co. Ltd. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090520 |