CN1321345C - Sidelight back light module - Google Patents
Sidelight back light module Download PDFInfo
- Publication number
- CN1321345C CN1321345C CNB031275362A CN03127536A CN1321345C CN 1321345 C CN1321345 C CN 1321345C CN B031275362 A CNB031275362 A CN B031275362A CN 03127536 A CN03127536 A CN 03127536A CN 1321345 C CN1321345 C CN 1321345C
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- type back
- module
- light source
- 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
Links
Images
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The present invention relates to a sidelight type back light module. The present invention comprises a light guide plate, at least one light source generator is arranged on the side edge of the light guide plate, a light source is provided by the light source generator and is emitted into the light guide plate, at least one reflector surrounds the outer side of the light source generator relatively to the light guide plate, light generated by the light source generator is reflected to the light guide plate by the reflector, a frame is arranged below the light guide plate and the reflector and coats the outer side of the reflector, and a heat-dissipative pad is arranged between the reflector and the frame.
Description
Technical field
The present invention relates to a kind of side-light type (edge light) backlight module, particularly relate to a kind of side light type back light module with high heat dissipation effect.
Background technology
Backlight module is one of key part and component of LCD, has been widely used at present on digital camera, personal digital assistant (PDA), computer monitor and the flat-surface television.Generally speaking, backlight module all is located at the below of a display panel, and has a light source and a light guide plate, in order to providing a homodisperse light to this display panel, and then forms suitable image by the pixel electrode on the control display panel.Wherein, backlight module can be according to the position of light source, is divided into light source and produces from (direct type) backlight module of the straight-down negative under the display panel or light source near the side-light type the display panel side (edge light type) backlight module.In addition, because side light type back light module is located at the side of display panel with light source generator, so can dwindle the volume and the manufacturing cost of LCD, and be applied to small-sized electric equipment products.
Please refer to Fig. 1, Fig. 1 is the diagrammatic cross-section of an existing side light type back light module 10.As shown in Figure 1, existing side light type back light module 10 is located at the below of a display panel 12, mainly include a light guide plate (light guide plate, LGP) 14 be located at display panel 12 belows, a light source generator (lightsource generator) 16 and be located at a side of light guide plate 14, the outside, a reflecting plate (reflecting sheet) 20 that a reflex housing 18 is located at light source generator 16 and be located at light guide plate 14 belows and be fixed on the framework 22, and a diffuser plate (diffusing plate) 24 is located between light guide plate 14 and the display panel 12.Wherein, light source generator 16 is used to provide a light source to display panel 12, and reflex housing 18 and reflecting plate 20 are used for the light that light source generator 16 is produced is reflexed to light guide plate 14 increasing the utilization rate of light, with so that a preferable brightness output is provided.This light source scattering (scatter) that light guide plate 14 is used for light source generator 16 is produced is to diffuser plate 24, diffuser plate 24 can be with the further scattering of the light that is reflected by light guide plate 14, to provide display panel 12 more homodisperse light, framework 22 then is to be used for fixing light guide plate 14, light source generator 16, reflex housing 18, reflecting plate 20 and diffuser plate 24.In addition, the general at least one prismatic lens (prism sheet) 26 that above diffuser plate 24, is provided with in addition usually, with the difference of further correction irradiation intensity, the light that display panel 12 is received can have a higher briliancy, and prismatic lens 26 set quantity and the visual demands of order are changed.
Generally speaking, light source generator 16 is that (cold cathodefluorescent lamp CCFL) constitutes, so can produce heat energy when operation by a cathode fluorescent tube mostly.And in order to satisfy light-weighted requirements such as the attenuation of future products thickness, volume-diminished, light source generator 16 in the backlight module 10 often all is installed in the narrow confined space, therefore the heat energy that is produced when operation often can't distribute and constantly accumulation smoothly, in case the running time longly slightly is easy to cause near the temperature the fluorescent tube too high.Yet because cathode fluorescent tube brightness when environment temperature is 30 to 40 ℃ puts up the best performance, so high temperature can make backlight module brightness descend, and the briliancy that influence LCD shows.In addition, too high temperature can influence the normal operation of display panel 12 and cause the reduction of display quality, even reduces the serviceable life of peripheral components significantly easily.
Summary of the invention
Therefore the object of the present invention is to provide a kind of side light type back light module of tool high heat dissipation effect, it utilizes a cooling pad to conduct the heat energy that backlight module produces fast, reducing the temperature of LCD effectively, and then keep the optimal display result of LCD.
In order to achieve the above object, the present invention discloses a kind of side light type back light module with high heat dissipation effect, include a light guide plate, at least one light source generator is arranged at the side of this light guide plate, be used to provide a light source and inject this light guide plate, at least one reflex housing (reflector) is surrounded on the outside of this light source generator with respect to this light guide plate, is used for the light that this light source generator produces is reflexed to this light guide plate, one framework (frame) with high heat biography coefficient is arranged at this light guide plate and this reflex housing below and coats the outside of this reflex housing, and one have the cooling pad (heat-dissipative pad) that high heat passes coefficient and be arranged between this reflex housing and this framework.Wherein this cooling pad is a resilient material, so can closely contact with this reflex housing and this framework, this cooling pad has high heat biography coefficient simultaneously, so can conduct the heat energy of the inner accumulation of backlight module fast, reaches the function of heat radiation.
Description of drawings
Fig. 1 is the diagrammatic cross-section of existing side light type back light module;
Fig. 2 is the diagrammatic cross-section of first embodiment of the invention side light type back light module;
Fig. 3 is the diagrammatic cross-section of second embodiment of the invention side light type back light module.
Embodiment
Please refer to Fig. 2, Fig. 2 is the diagrammatic cross-section of side light type back light module 50 first embodiment of the present invention.As shown in Figure 2, side light type back light module 50 of the present invention is located at the below of a display panel 52, it includes a light guide plate (light guide plate, LGP) 54, be located at display panel 52 belows, at least one light source generator (light source generator) 56 is located at a side of light guide plate 54, one reflex housing 58 be located at light source generator 56 with respect to another outside of light guide plate 54 and coat the outside of light source generator 56, one reflecting plate (reflecting sheet) 60 is located at light guide plate 54 belows and is fixed on the framework 62, one diffuser plate (diffusing sheet) 64 is located between light guide plate 54 and the display panel 52, and one cooling pad 66 be located between light-guiding shade 58 and the framework 62 heat energy that produces in order to light conducting source generator 56.
Wherein, light source generator 56 is for example: cathode fluorescent tube (cold cathode fluorescentlamp, CCFL), thermal cathode fluorescent tube (hot cathode fluorescent lamp, HCFL), external electrode fluorescent lamp pipe (extemal electrode fluorescent lamp, EEFL) or other be applicable to the light source generator of side light type back light module, be used to provide a light source to display panel 52.Reflex housing 58 is one to coat the rectangle works of light source generator 56, is used for the light that light source generator 56 is produced is reflexed in the light guide plate 54 increasing the utilization rate of light, and then a preferable brightness output is provided.This light source scattering (scatter) that light guide plate 54 is used for light source generator 56 is produced is to diffuser plate 64.64 of diffuser plates can will be reflected the further scattering of light by light guide plate 54, to provide display panel 52 more homodisperse light.62 of frameworks are to be used for fixing light guide plate 54, light source generator 56, reflex housing 58, reflecting plate 60 and diffuser plate 64 etc.In addition, generally above diffuser plate 64, be provided with at least one prismatic lens (prism sheet) 68 usually in addition, with the brightness of further raising module.
It should be noted that, cooling pad 66 of the present invention is made of the material that elasticity and the high heat of tool pass coefficient, therefore can closely fit with reflex housing 52 that contacts and framework 62, and then utilization itself has characteristic that high heat passes coefficient the heat energy of side light type back light module 50 inner accumulations is conducted to the external world via framework 62, reach the function of rapid heat radiation with the temperature of effective reduction side light type back light module 50, and then avoid the too high variety of problems of deriving of backlight module temperature.
Please refer to Fig. 3, Fig. 3 is the diagrammatic cross-section of side light type back light module 50 second embodiment of the present invention.For convenience of description, Fig. 3 uses the label identical with Fig. 2.As shown in Figure 3, side light type back light module 50 of the present invention is located at the below of a display panel 52, it includes a light guide plate (lightguide plate, LGP) 54, be located at display panel 52 belows, at least one light source generator (light sourcegenerator) 56 is located at a side of light guide plate 54, one reflex housing 58 is located at the outside of light source generator 56, and the outside of coating light source generator 56, one reflecting plate (reflecting sheet) 60 is located at light guide plate 54 belows and is fixed on the framework 62, one diffuser plate (diffusing plate) 64 is located between light guide plate 54 and the display panel 52, and one cooling pad 66 be located between reflex housing 58 and the framework 62 heat energy that produces in order to light conducting source generator 56.In the embodiment shown in fig. 3, each assembly of side light type back light module 50 of the present invention is roughly identical with first embodiment, its main difference part is that the reflex housing 58 of second embodiment is the reflex housing of a circular arc type structure or non-square structure, so that the light that light source generator 56 is produced more reflexes in the light guide plate 54 in the active set, and as previously mentioned, because cooling pad 66 of the present invention is a resilient material, so still can be effectively and reflex housing 58 and framework 62 close proximity touch, and by itself high hot characteristic that passes coefficient, with the heat energy of the inner accumulation of rapid conduction side light type back light module.
Compared with prior art, side light type back light module of the present invention is that a cooling pad is set between reflex housing and framework, utilize the elasticity of this cooling pad and the characteristic that high heat passes coefficient again, effectively the thermal energy conduction that light source generator was produced is gone out backlight module, and then reach the effect of quick heat radiating, so can substantially improve existing side light type back light module because of the space narrow can't efficiently radiates heat causes reduction brightness, reduce assembly life-span, have a strong impact on shortcoming such as display quality.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (11)
1. side light type back light module, this side light type back light module includes:
One light guide plate;
At least one light source generator is arranged at the side of this light guide plate, is used to provide a light source and injects this light guide plate;
At least one reflex housing is surrounded on the outside of this light source generator with respect to this light guide plate, is used for the light that this light source generator produces is reflexed to this light guide plate;
One has the framework that high heat passes coefficient, is arranged at this light guide plate and this reflex housing below, and coats the outside of this reflex housing; And
One has the cooling pad that high heat passes coefficient, is arranged between this reflex housing and this framework, and closely contacts with this framework with this reflex housing.
2. side light type back light module as claimed in claim 1, wherein this cooling pad has elasticity.
3. side light type back light module as claimed in claim 1, wherein this light source generator is a cathode fluorescent tube.
4. side light type back light module as claimed in claim 1, wherein this light source generator is a thermal cathode fluorescent tube.
5. side light type back light module as claimed in claim 1, wherein this light source generator is an external electrode fluorescent lamp pipe.
6. side light type back light module as claimed in claim 1, wherein this framework is a metal framework.
7. side light type back light module as claimed in claim 1, wherein this reflex housing includes at least two rectangular structure limits, and at least one this structure limit contacts with this cooling pad.
8. side light type back light module as claimed in claim 1, wherein this reflex housing is a circular arc type structure.
9. side light type back light module as claimed in claim 1, wherein this cooling pad is used for heat energy that this light source generator is produced, conducts to this framework via this reflex housing, to increase the radiating efficiency of this side light type back light module.
10. side light type back light module as claimed in claim 1, other includes a diffuser plate, is arranged at this light guide plate top, is used for the light that this light guide plate of scattering reflected.
11. side light type back light module as claimed in claim 1, other includes at least one prismatic lens, is arranged at this diffuser plate top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031275362A CN1321345C (en) | 2003-08-06 | 2003-08-06 | Sidelight back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031275362A CN1321345C (en) | 2003-08-06 | 2003-08-06 | Sidelight back light module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1580896A CN1580896A (en) | 2005-02-16 |
| CN1321345C true CN1321345C (en) | 2007-06-13 |
Family
ID=34578835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031275362A Expired - Lifetime CN1321345C (en) | 2003-08-06 | 2003-08-06 | Sidelight back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1321345C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100687926B1 (en) | 2005-06-13 | 2007-02-27 | 삼성전자주식회사 | Liquid crystal display |
| CN100437277C (en) * | 2005-09-22 | 2008-11-26 | 鸿富锦精密工业（深圳）有限公司 | Back-light model group |
| US7527408B2 (en) | 2005-10-24 | 2009-05-05 | Lg Electronics Inc. | Backlight unit having heat dissipating layer, display device having heat dissipating layer, and method for manufacturing heat dissipating layer |
| JP4440868B2 (en) * | 2005-10-25 | 2010-03-24 | 三菱電機株式会社 | Planar light source device and liquid crystal display device using the same |
| CN101089700B (en) * | 2006-06-14 | 2010-09-08 | 奇美电子股份有限公司 | Liquid crystal module |
| KR101282326B1 (en) * | 2006-11-15 | 2013-07-04 | 삼성디스플레이 주식회사 | Back-light assembly and liquid crystal display apparatus having the same |
| CN101749568B (en) * | 2008-12-01 | 2013-10-02 | 群康科技(深圳)有限公司 | Backlight module and manufacturing method thereof |
| CN102086992B (en) * | 2009-12-04 | 2015-06-03 | 群创光电股份有限公司 | Backlight module and application thereof |
| WO2011089805A1 (en) * | 2010-01-22 | 2011-07-28 | シャープ株式会社 | Lighting device, display device, and television receiver |
| KR101342247B1 (en) * | 2012-03-22 | 2013-12-16 | 티티엠주식회사 | backlight unit |
| TWI475299B (en) * | 2012-07-30 | 2015-03-01 | Au Optronics Corp | Backlight module and assembly method thereof |
| CN107203949A (en) * | 2017-04-14 | 2017-09-26 | 扬州大学 | A kind of home making industry electric business platform |
| CN107314285A (en) * | 2017-06-30 | 2017-11-03 | 武汉华星光电技术有限公司 | Backlight module and mobile terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10199320A (en) * | 1997-01-06 | 1998-07-31 | Nitto Denko Corp | Surface light source device and liquid crystal display device |
| JP2000207917A (en) * | 1999-01-14 | 2000-07-28 | Samsung Electronics Co Ltd | Backlight assembly for liquid crystal display device module |
| JP2002268564A (en) * | 2001-02-21 | 2002-09-20 | Unipac Optoelectronics Corp | Light source device having function to make temperature uniform and flat display |
| CN2562206Y (en) * | 2002-01-07 | 2003-07-23 | 晶达光电股份有限公司 | Background light source assembly |
-
2003
- 2003-08-06 CN CNB031275362A patent/CN1321345C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10199320A (en) * | 1997-01-06 | 1998-07-31 | Nitto Denko Corp | Surface light source device and liquid crystal display device |
| JP2000207917A (en) * | 1999-01-14 | 2000-07-28 | Samsung Electronics Co Ltd | Backlight assembly for liquid crystal display device module |
| JP2002268564A (en) * | 2001-02-21 | 2002-09-20 | Unipac Optoelectronics Corp | Light source device having function to make temperature uniform and flat display |
| CN2562206Y (en) * | 2002-01-07 | 2003-07-23 | 晶达光电股份有限公司 | Background light source assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1580896A (en) | 2005-02-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2778774B1 (en) | Liquid crystal display apparatus | |
| US6989873B2 (en) | Backlight module and liquid crystal display formed therefrom | |
| KR101807442B1 (en) | Backlight module and liquid crystal display device using backlight module | |
| CN1608184A (en) | Illumination unit and liquid crystal display device using the unit | |
| CN1321345C (en) | Sidelight back light module | |
| CN102620203B (en) | Backlight module and liquid crystal display device | |
| US20080232134A1 (en) | Replaceable LED light source device used in backlight module | |
| US7178962B2 (en) | Reflecting apparatus for backlight module of flat panel display | |
| KR20070076427A (en) | Backlight module | |
| KR100472792B1 (en) | Backlight unit for liquid crystal display device and portable terminal equipment | |
| JP2008103150A (en) | Surface light source device | |
| KR101777528B1 (en) | Backlight module and liquid crystal display device using same | |
| US20100002467A1 (en) | Light Guide Plate and Backlight Module Using the Light Guide Plate | |
| KR100838332B1 (en) | Back light unit for flat-panel display | |
| US20080013337A1 (en) | Backlight module and liquid crystal display | |
| CN101082734A (en) | Side light type back light module unit | |
| CN1244838C (en) | Backlight module | |
| CN201060349Y (en) | Side light type module unit | |
| CN100395631C (en) | Backlight assembly | |
| US7029158B2 (en) | Hollow backlight module | |
| JP2005129346A (en) | Backlight unit | |
| KR100664547B1 (en) | Direct method back light | |
| TWI309321B (en) | Direct illuminance back light module and applications thereof | |
| TWI240118B (en) | Edge light type back light module | |
| KR20050011901A (en) | back light unit of liquid crystal display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20070613 |
|
| CX01 | Expiry of patent term |