CN201054057Y - Direct type high brightness backlight - Google Patents
Direct type high brightness backlight Download PDFInfo
- Publication number
- CN201054057Y CN201054057Y CNU2007201037329U CN200720103732U CN201054057Y CN 201054057 Y CN201054057 Y CN 201054057Y CN U2007201037329 U CNU2007201037329 U CN U2007201037329U CN 200720103732 U CN200720103732 U CN 200720103732U CN 201054057 Y CN201054057 Y CN 201054057Y
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- Prior art keywords
- prism film
- direct high
- high bright
- backlight according
- bright backlight
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- 238000009792 diffusion process Methods 0.000 claims description 15
- 238000004020 luminiscence type Methods 0.000 claims description 9
- 241000272165 Charadriidae Species 0.000 claims description 7
- 238000005286 illumination Methods 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 238000005375 photometry Methods 0.000 description 2
- 241001354471 Pseudobahia Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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- Planar Illumination Modules (AREA)
Abstract
The utility model relates to a high brightness and high uniformity downright type highlight backlight source used for the illumination of a crystal display which needs higher brightness. The highlight backlight source mainly comprises a luminous component, a diffuser plate, a lower diffuser plate and an upper diffuser plate which are sequentially arranged from bottom to top. A first prism film and a second film which is orthogonal with the first prism film are arranged between the lower diffuser plate and the upper diffuser plate. The prearranged space of the luminous component is internally provided with a thermocouple. The luminous component mainly comprises a box body which is formed by a motherboard and two pairs of lateral plates, wherein, a plurality of light sources are fixed at intervals between one pair of lateral plates, the inner side of the other pair of lateral plates is provided with a backboard. A reflector plate is arranged between the light source and the motherboard. The downright type highlight backlight source can meet the requirements of highlight display pieces which are used in the outdoors and the special occasion.
Description
Technical field
The utility model relates to a kind of direct-light-type backlight, and the direct high bright backlight of especially a kind of high brightness, high uniformity is used for the illumination of briliancy requirement than higher LCD.
Background technology
At present, flat pannel display (hereinafter to be referred as: FPD) in the technology, LCD (hereinafter to be referred as: LCD) occupy dominant position, and transmission type LCD is the main flow of current LCD technology.Because LCD itself is not luminous, so backlight is absolutely necessary for transmission type LCD.
In general, according to the difference of distribution of light sources position, backlight can be divided into photometry formula backlight and direct-light-type backlight.Side-light type back light is mainly used in LCD at present, and direct-light-type backlight then is mainly used in LCD TV.
Typical side-light type back light is made up of light source, light guide plate, reflecting plate, diffuser plate, prismatic lens and polaroid.Its groundwork process is: the light that light source sends is coupled into after the light guide plate between bottom surface on the light guide plate and two sides back and forth from the light guide plate front end face that total reflection advances to light guide plate terminal surface direction, when being mapped to the scattering netted dot of bottom surface, thereby reflected light is to all directions scattering and destroy total reflection condition part scattered light and have an opportunity to transmit light guide plate from upper bottom surface, becomes output light.For utilizing the scattered light that spills at reverse side to be provided with reflecting plate once more, be provided with diffuser plate for alleviating the brightness spot, for increasing positive luminous intensity, increased prismatic lens and polaroid again.The backlight illuminating system of this mode meets slim requirement, and can obtain highlighted, even planar light source, nearly all notebook computer and various large-scale LCD show the backlight illuminating system that is to use this mode, and this backlight illuminating system has become the main product of backlight illuminating system in the large-scale LCD at present.Brightness is an important parameter in the backlight performance, has only the backlight of high brightness could make that picture color is more bright-coloured.The brightness of photometry formula backlight and the light source that is arranged on the light guide plate side have very big relation, still, because its application is very high to the requirement of slim light weight, so do not allow to be provided with more light source.Therefore, this sidelight mode can't realize the backlight of high brightness and high briliancy.The brightness of LCD at present has only 250cd/m
2About, the nearly 5500cd/m of the center brightness of its backlight
2About, all can't satisfy the requirement that open air (especially under the sunburst) shows.In order under strong sunshine, to see display frame clearly, must improve the picture brightness of LCD device, so press for the high brightness backlights source that is applicable to LCD.
The utility model content
The technical problems to be solved in the utility model provides a kind of backlight that can satisfy the requirement of the high brightness LCD device that open air and special occasions use.
For solving the problems of the technologies described above, the technical solution of the utility model is, a kind of direct high bright backlight is provided, mainly comprise the luminescence component that sets gradually from the bottom to top, diffuser plate, diffusion sheet and last diffusion sheet down, also be provided with between described time diffusion sheet and the last diffusion sheet first prism film and with second prism film of the first prism film quadrature; Be provided with a thermopair in the pre-set space of described luminescence component.Described luminescence component comprises by a base plate and two pairs of box bodys that side plate is formed, a plurality of light sources of fixed interval between the pair of side plates wherein, and another inboard to side plate is provided with backboard, between described light source and the base plate reflector plate is set.The height of described box body is 15～40mm, and the inboard of described backboard and the angle of base plate are 115～170 °.Described light source can for cathode fluorescent tube (hereinafter to be referred as: CCFL), can also for light emitting diode (hereinafter to be referred as: LED).Light source in the preferred implementation of the present utility model is the CCFL fluorescent tube, is fixed with the stilt of described CCFL fluorescent tube on the described base plate, and stilt passes the hole of offering on the described reflector plate; Described CCFL fluorescent tube has the fluorescent tube holder.Described first prism film can be horizontally disposed prism film, and so described second prism film then is vertically disposed prism film; Described first prism film can also be vertically disposed prism film, and so described second prism film then is horizontally disposed prism film.
The brightness of the direct-light-type backlight of this structure can reach 20000cd/m
2More than, utilize the LCD of its illumination to have 1000cd/m
2Above brightness has reached the requirement of the outdoor demonstration of LCD.And the thermopair in this direct-light-type backlight can carry out temperature control to backlight, has reduced the influence of temperature overheating to backlight.Therefore, this direct high bright backlight is applicable to briliancy is required than LCD higher and that special occasions uses.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
Shown in Figure 1 is the structural representation of an embodiment of the utility model direct high bright backlight, and light source is the CCFL fluorescent tube.
Shown in Figure 2 is the structural representation of fluorescent tube holder 140 among Fig. 1.
Shown in Figure 3 is the vertical view of Fig. 1.
Shown in Figure 4 is the light path synoptic diagram of the embodiment of the utility model direct high bright backlight.
Embodiment
An embodiment of direct high bright backlight described in the utility model, its structure as shown in Figure 1.Mainly comprise the luminescence component 1 that sets gradually from the bottom to top, diffuser plate 2, down diffusion sheet 31, go up diffusion sheet 32, and also be provided with between diffusion sheet 31 and the last diffusion sheet 32 down first prism film 41 and with second prism film 42 of first prism film, 41 quadratures.Be provided with a thermopair 18 in the pre-set space of luminescence component 1, the effect of thermopair 18 is that the backlight temperature is detected, when temperature reaches preset reference temperature, feed back signal to control circuit, reduce electric current to reduce the brightness of CCFL fluorescent tube 14, carry out the internal temperature management and control, reduced the influence of temperature overheating backlight.Luminescence component 1 mainly comprises by a base plate 10 and the two pairs of side plates 11 and 12 box bodys of forming, a plurality of CCFL fluorescent tubes 14 of fixed interval between the pair of side plates 12 wherein, another inboard to side plate 11 is provided with backboard 16, between CCFL fluorescent tube 14 and the base plate 10 reflector plate 13 is set.The CCFL fluorescent tube also is provided with fluorescent tube holder 140 14 times, with support luminous tube, makes it should not be broken, and the concrete structure of fluorescent tube holder 140 is referring to shown in Figure 2.The height of box body is 15～40mm, and the angle 17 of the inboard of backboard 16 and reflector plate 13 is 115～170 °.This angle 17 mainly is the homogeneity that has guaranteed mixed light, makes the edge reduce the generation of blackening.In addition, in order to reach optical effect preferably, can correspondingly adjust angle 17 according to the difference of mixed light height (box body height).Be fixed with the stilt 15 of CCFL fluorescent tube on the base plate 10, stilt 15 passes the hole of offering on the reflector plate 13.First prism film 41 can be horizontally disposed prism film, and 42 of second prism films are vertically disposed prism film so; First prism film 41 can also be vertically disposed prism film, and 42 of second prism films are horizontally disposed prism film so.The arrangement mode of CCFL fluorescent tube 14 and stilt 15 as shown in Figure 3.The part light path of this backlight as shown in Figure 4, and in conjunction with content shown in Figure 1, the light that CCFL fluorescent tube 14 sends reflexes to diffuser plate 2 by reflector plate 13, and then the following diffusion sheet 31 through a low light transmission degree incides on mutually orthogonal first prism film 41 and second prism film 42.First prism film 41 and second prism film 42 utilize micro-prism structure of himself and mutually orthogonal particular design, the wide-angle divergent rays of diffusion sheet 31 outgoing is down reflected back downwards, recycling, again converge in zone line (70 ° of left and right sides scopes of normal) outgoing, thereby reach the effect of blast.Emergent light after the blast through the last diffusion sheet 32 of a high-transmittance, evenly and is vertically injected LCD display at last.
CCFL fluorescent tube 14 in the utility model also can replace with White LED or R, G, B three-color LED, and concrete scheme is: White LED or R, G, B three-color LED are arranged on the backlight below according to lattice structure replace CCFL fluorescent tube 14, fluorescent tube holder 140 and stilt 15 in the foregoing description.
Technology of the present utility model can also be used for the ambient light illumination of outdoor demonstration, outdoor advertising and fuel charger advertisement except the backlight that goes for LCD.
The utility model is not limited to above-mentioned embodiment; should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from principle of the present utility model; can also make some distortion and improvement, these also should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. direct high bright backlight, comprise the luminescence component that sets gradually from the bottom to top, diffuser plate, diffusion sheet and last diffusion sheet down, it is characterized in that: be provided with between described time diffusion sheet and the last diffusion sheet first prism film and with second prism film of the first prism film quadrature; Be provided with a thermopair in the pre-set space of described luminescence component.
2. direct high bright backlight according to claim 1, it is characterized in that: described luminescence component comprises by a base plate and two pairs of box bodys that side plate is formed, the a plurality of light sources of fixed interval between the described pair of side plates, described another inboard to side plate is provided with backboard, between described light source and the base plate reflector plate is set.
3. direct high bright backlight according to claim 1 is characterized in that: described first prism film is horizontally disposed prism film, and described second prism film is vertically disposed prism film.
4. direct high bright backlight according to claim 1 is characterized in that: described first prism film is vertically disposed prism film, and described second prism film is horizontally disposed prism film.
5. direct high bright backlight according to claim 2 is characterized in that: the inboard of described backboard and the angle of reflector plate are 115～170 °.
6. direct high bright backlight according to claim 2 is characterized in that: the height of described box body is 15～40mm.
7. direct high bright backlight according to claim 2 is characterized in that: described light source is the CCFL fluorescent tube.
8. direct high bright backlight according to claim 2 is characterized in that: described light source is LED.
9. direct high bright backlight according to claim 7 is characterized in that: be fixed with the stilt of described CCFL fluorescent tube on the described base plate, above support passes the hole of offering on the described reflector plate.
10. direct high bright backlight according to claim 7 is characterized in that: described CCFL fluorescent tube has the fluorescent tube holder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201037329U CN201054057Y (en) | 2007-03-06 | 2007-03-06 | Direct type high brightness backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201037329U CN201054057Y (en) | 2007-03-06 | 2007-03-06 | Direct type high brightness backlight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201054057Y true CN201054057Y (en) | 2008-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201037329U Expired - Lifetime CN201054057Y (en) | 2007-03-06 | 2007-03-06 | Direct type high brightness backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201054057Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748649A (en) * | 2011-04-20 | 2012-10-24 | 群康科技(深圳)有限公司 | Direct type backlight module and display device using same |
| CN103090272A (en) * | 2013-01-25 | 2013-05-08 | 京东方科技集团股份有限公司 | Straight down type backlight module and display device provided with the same |
| CN104566045A (en) * | 2015-01-27 | 2015-04-29 | 创维液晶器件(深圳)有限公司 | Direct-lit backlight module and assembling method thereof |
| CN112255840A (en) * | 2020-11-04 | 2021-01-22 | 深圳市柯瑞光电科技有限公司 | LED backlight source for hyperboloid cell-phone |
-
2007
- 2007-03-06 CN CNU2007201037329U patent/CN201054057Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748649A (en) * | 2011-04-20 | 2012-10-24 | 群康科技(深圳)有限公司 | Direct type backlight module and display device using same |
| CN102748649B (en) * | 2011-04-20 | 2015-08-12 | 群康科技(深圳)有限公司 | Direct type backlight module and apply its display device |
| CN103090272A (en) * | 2013-01-25 | 2013-05-08 | 京东方科技集团股份有限公司 | Straight down type backlight module and display device provided with the same |
| CN103090272B (en) * | 2013-01-25 | 2015-08-12 | 京东方科技集团股份有限公司 | A kind of down straight aphototropism mode set and display unit |
| CN104566045A (en) * | 2015-01-27 | 2015-04-29 | 创维液晶器件(深圳)有限公司 | Direct-lit backlight module and assembling method thereof |
| CN104566045B (en) * | 2015-01-27 | 2017-07-25 | 深圳创维－Rgb电子有限公司 | A direct type backlight module and its assembly method |
| CN112255840A (en) * | 2020-11-04 | 2021-01-22 | 深圳市柯瑞光电科技有限公司 | LED backlight source for hyperboloid cell-phone |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xiamen BOE Co., Ltd. Assignor: BEIJING BOE CHATANI ELECTRONICS Co.,Ltd. Contract fulfillment period: 2008.11.20 to 2013.11.20 Contract record no.: 2009990000032 Denomination of utility model: Direct type high brightness backlight Granted publication date: 20080430 License type: Exclusive license Record date: 20090114 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.11.20 TO 2013.11.20; CHANGE OF CONTRACT Name of requester: XIAMEN JINGDONGFANG ELECTRONICS CO., LTD. Effective date: 20090114 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080430 |