CN103728775B - For lamp shadow removing method and the LCD product of direct LED backlight - Google Patents
For lamp shadow removing method and the LCD product of direct LED backlight Download PDFInfo
- Publication number
- CN103728775B CN103728775B CN201310748323.4A CN201310748323A CN103728775B CN 103728775 B CN103728775 B CN 103728775B CN 201310748323 A CN201310748323 A CN 201310748323A CN 103728775 B CN103728775 B CN 103728775B
- Authority
- CN
- China
- Prior art keywords
- led
- light source
- light
- spot area
- reflector plate
- 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.)
- Active
Links
Landscapes
- Planar Illumination Modules (AREA)
Abstract
The present invention discloses a kind of lamp shadow removing method for direct LED backlight and LCD product, utilizes LED/light source direct projection diffuser plate; Utilize reflector plate that LED/light source shines directly into the disperse light beyond diffuser plate to reflect; Described disperse light forms spot area on described reflector plate; Reduce the reflectivity of the spot area of described reflector plate. The present invention adopts the method for local modification reflector plate reflection characteristic to reduce the reflecting brightness of the spot area that LED is formed, light intensity received by the region of LED is just weakened by liquid crystal panel, then the light intensity homogenizing that whole liquid crystal panel receives is made, eliminate the lamp shadow problem of liquid crystal panel, improve the display effect of liquid crystal panel. This technology is applied in the LCD product adopting direct LED backlight technical project, it is possible to save the LED of some amount or suitably shorten the light mixing distance of LED to diffuser plate, to reduce complete machine cost, it is to increase the aesthetics of machine shape.
Description
Technical field
The invention belongs to liquid crystal display product technical field, specifically, relate to a kind of liquid crystal display product adopting direct-light type LED backlight lighting engineering to design.
Background technology
Present liquid crystal display product, liquid crystal panel is thrown light on by main employing direct LED backlight technology or side entering-type LED backlight source technology, to realize the display of picture. At present, direct LED backlight technology mainly adopts LED to mount lens (lens) as core component, lens are utilized to expand the dispersion angle of LED light, utilize the air slot formed between LED and diffuser plate, for LED light provides light mixing distance, and then after LED light is mixed, arrive diffuser plate again, LED light done further after DIFFUSION TREATMENT by diffuser plate, evenly it is irradiated on whole liquid crystal panel.
Adopt the LCD product of this kind of direct LED backlight technical project, it may also be useful to LED quantity spacing that is more many and LED more little, the mixed effect of light is more good; Meanwhile, light mixing distance is more big, and the mixed effect of light is also more good. Therefore, current main quantity or increase light mixing distance two kinds of modes adopting increase LED, improve the mixed effect of light, LED light evenly are thrown light on on liquid crystal panel, it is to increase display effect.
But, when increasing LED quantity, owing to LED and lens are expensive, the significantly rising of complete machine cost therefore can be caused; Adopt the mode increasing light mixing distance then can cause the increase of product thickness, and then affect the aesthetics of machine product profile. If reducing complete machine cost or realizing the ultrathin design of machine product, and reduce the use quantity of LED or shorten light mixing distance, the light that then likely can cause being irradiated to liquid crystal panel is uneven, thus lamp shadow phenomenon occurs, seriously affects the display effect of LCD product.
Summary of the invention
The present invention is directed to the LCD product adopting the design of direct-light type LED backlight lighting engineering at present, propose a kind of method for eliminating lamp shadow, can under minimizing LED use quantity and the prerequisite not increasing light mixing distance (or suitably reducing light mixing distance), it is achieved to the uniform irradiation of liquid crystal panel.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
For a lamp shadow removing method for direct LED backlight, utilize LED/light source direct projection diffuser plate; Utilize reflector plate that LED/light source shines directly into the disperse light beyond diffuser plate to reflect; Described disperse light forms spot area on described reflector plate; Reduce the reflectivity of the spot area of described reflector plate.
As wherein a kind of design that spot area carries out reducing reflectivity process, in described spot area, lay the reflective medium of reflectivity lower than described reflector plate, reduced the reflectivity of light in spot area by described reflective medium.
Further, described reflective medium and reflector plate are stitched together, are laid on backboard and are covered with whole interior of backboard, form full wafer echo area, to expand echo area.
When spot area is annular, it is preferable that described reflective medium is also designed to annular, and the annular diameters of annular reflective medium should slightly larger than the diameter of LED/light source, and outer annular diameter is preferably less than 80mm; It is laid on backboard by described LED/light source to be positioned at the region of annular reflective medium inner ring.
Preferably, described reflective medium preferably adopts sub-light material to make.
As another design that spot area carries out reducing reflectivity process, ink layer is set up at the position being positioned at spot area on described reflector plate, is reduced the reflectivity of spot area internal reflection sheet by ink layer.
Preferably, described ink layer preferably adopts the mode of printing or spraying ink on reflector plate to be formed; Described reflector plate and LED/light source are laid on backboard, it is preferable that described reflector plate is covered with face in whole backboard, only in the position perforate laying LED/light source, fix for the installation of LED/light source on backboard.
When spot area is annular, it is preferable that described ink layer is designed to annular, and the annular diameters of annular ink layer should slightly larger than the diameter of LED/light source, and outer annular diameter is preferably less than 80mm; It is laid on backboard by described LED/light source to be positioned at the region of ink layer inner ring.
As the third design that spot area carries out reducing reflectivity process, breach is offered at the position being positioned at spot area on described reflector plate, reduce the area of spot area internal reflection sheet by offering breach, and then reach the purpose of design reducing spot area reflectivity.
Preferably, described breach is preferably designed to striped breach, and described striped breach preferably arranges many, and by parallel for described many stripe breach laying.
In order to reduce the impact on backlight center brightness, for the plurality of LEDs light source being laid on backboard, the reflectivity of the spot area that the reflectivity preferably arranging the spot area that the LED/light source being positioned at position, central zone is formed is formed higher than other LED/light source, to ensure the center brightness of liquid crystal panel.
Based on the above-mentioned lamp shadow removing method for direct LED backlight, the invention allows for the LCD product designed described in a kind of employing for the lamp shadow removing method of direct LED backlight, comprise liquid crystal panel and backlight module, described backlight module is provided with backboard, LED/light source and reflector plate;By LED/light source direct projection diffuser plate; Utilize reflector plate that LED/light source shines directly into the disperse light beyond diffuser plate to reflect; Described disperse light forms spot area on described reflector plate; Reduce the reflectivity of the spot area of described reflector plate.
Compared with prior art, advantage and the positively effect of the present invention be: the present invention adopts the method for local modification reflector plate reflection characteristic, reduce the reflecting brightness of the spot area that LED is formed, light intensity received by the region of LED is just weakened by liquid crystal panel, then the light intensity homogenizing that whole liquid crystal panel receives is made, eliminate the lamp shadow problem of liquid crystal panel, improve the display effect of liquid crystal panel. This technology is applied in the LCD product adopting the design of direct-light type LED backlight lighting engineering, it is possible not only to the LED saving some amount, to realize the obvious reduction of complete machine cost; And, it is also possible to suitably shorten the light mixing distance of LED to diffuser plate, to reduce the thickness of backlight module, it is to increase the aesthetics of LCD product machine shape, and then while ensureing illumination effect, it is achieved the ultrathin design of LCD product.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the packaging assembly schematic diagram of backlight module and liquid crystal panel in LCD product;
Fig. 2 is the structural representation of a kind of embodiment of reflector space local modification mode in LCD product proposed by the invention;
Fig. 3 is the structural representation of another embodiment of reflector space local modification mode in LCD product proposed by the invention;
Fig. 4 is the partial enlargement figure in reflection characteristic amendment region in Fig. 3.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail.
The present embodiment is for the LCD product adopting the design of direct-light type LED backlight lighting engineering, when the LED quantity used in product is few or LED to diffuser plate light mixing distance in short-term, the problem of liquid crystal panel uneven illumination even (i.e. lamp shadow phenomenon) easily occurs, propose a kind of method that can effectively eliminate direct LED backlight lamp shadow phenomenon, by to the amendment carrying out local reflection characteristic in backlight module for reflecting the reflector plate of LED light line, to reduce the reflectivity that LED/light source projects the spot area formed on reflector plate, and then the gap making the light intensity of light intensity that spot area reflects and the reflection of non-spot area reduces, then the light intensity making whole liquid crystal panel receive is even, realize LED backlight to the uniform irradiation of liquid crystal panel.
Below in conjunction with Fig. 1 to Fig. 4, the lamp shadow removing method for direct LED backlight proposed by the present embodiment carries out setting forth in detail.
Shown in Figure 1, LCD product is provided with liquid crystal panel 4 and the backlight module for illuminating liquid crystal panel 4. Described backlight module is mainly provided with the parts such as backboard 5, reflector plate 2, LED/light source 1 and diffuser plate 3. Wherein, backboard 5 plays the effect supporting and protecting internal components, generally includes bottom surface 5-1 and surrounding side 5-2, and surrounding side 5-2 extends out, and end face is for installing diffuser plate 3 and liquid crystal panel 4. The bottom surface 5-1 of backboard 5 installs LED/light source 1, by the light-emitting area of LED/light source 1 forward, just to diffuser plate 3 and liquid crystal panel 4, diffuser plate 3 and liquid crystal panel 4 is directly irradiated. The bottom surface 5-1 and surrounding side 5-2 of backboard 5 install reflector plate 2 respectively, and the reflector plate 2 being arranged on the 5-1 of bottom surface is positioned at the rear of LED/light source 1, for LED/light source 1 point of disperse light being mapped to rear and surrounding fully being reflected, to improve light emission rate.
In order to improve intensity of illumination, the bottom surface 5-1 of backboard 5 needs lay plurality of LEDs light source 1, plurality of LEDs light source 1 is arranged in matrix array form, and is substantially covered with the bottom surface 5-1 of whole backboard 5, as shown in Figure 1 and Figure 2, to provide the light that can be enough to meet liquid crystal panel brightness of illumination demand.
The characteristics of luminescence according to LED: the central position of distance LED/light source 1 is more near, and the intensity of light is more big; The central position of distance LED/light source 1 is more far away, and the intensity of light is more weak. When the comparatively small amt of the LED/light source 1 laid in backlight module, the spacing between two LEDs light sources 1 will become big. The light launched by LED/light source 1, owing to there is the problem of lighting angle, part light shines directly on diffuser plate 3, and part ray cast is on the reflector plate 2 of rear and surrounding side, carry out once via reflector plate 2 or repeatedly reflection after, finally penetrate to described diffuser plate 3.
In practical work process, projected the light at rear by LED/light source 1, hot spot (region that macroscopic brightness is stronger) can be formed on the reflector plate 2 being arranged on backboard 5 bottom surface 5-1, reflector space 6 as shown in Figure 2. Due to the light intensity height in spot area 6, the light intensity therefore reflexing to diffuser plate 3 is also high, causes the brightness height in this region; And project the light outside spot area 6 due to intensity weak, thus, after reflector plate 2 reflects, the intensity projecting diffuser plate 3 is also weak, thus forms bright secretly uneven " lantern " phenomenon on liquid crystal panel 4, i.e. lamp shadow problem, drastically influence the display effect of LCD product.
In order to solve lamp shadow problem, the reflector plate 2 being positioned at LED/light source 1 rear is processed by the present embodiment, the mode of amendment reflector plate 2 local reflection characteristic is adopted to reduce the reflectivity in spot area 6, with be reduced by spot area 6 and non-spot area reflection light intensity between gap, after air slot through being formed between LED/light source 1 with diffuser plate 3 mixes, evenly it is irradiated on diffuser plate 3, diffusion sheet in the diffuser plate 3 and light of incidence is spread by prismatic lens respectively and after incremental processing, it is achieved to the uniform irradiation of liquid crystal panel 4.
Carry out reducing in the process of reflectivity process in the spot area 6 formed by LED/light source 1, the present embodiment proposes following three kinds of designs, three kinds of designs is specifically described respectively below.
Scheme one, shown in Figure 2, in order to reduce the reflectivity of reflective medium in spot area 6, this scheme adopts the mode of local replacing reflective medium, originally the reflector plate 2 being laid on backboard 5 is carried out local modification, reflectivity is used to be laid in described spot area 6 lower than the reflective medium of former reflector plate 2, to reduce the reflection characteristic of spot area 6.
Specifically, it is possible to select the sub-light material of air spots cunning as described reflective medium, be laid in described spot area 6; Or select any surface finish but reflectivity lower than the light material of reflector plate 2 as described reflective medium, be laid in described spot area 6, and spot area 6 is outer still lays original reflector plate 2. Owing to the reflectivity of the reflective medium in spot area 6 is lower than the light reflectance of the reflector plate 2 outside spot area 6, even if the light intensity being thus irradiated in spot area 6 is big, but the light intensity being reflexed to expansion board 3 by reflective medium can't be too high, the gap of the light intensity being reflexed to diffuser plate 3 by reflective medium and reflector plate 2 by reducing, thus weaken bright dark contrast gradient, realize the Homogeneous phase mixing of reflection light, and then avoid the lamp shadow phenomenon forming light and shade inequality on liquid crystal panel 4.
As a kind of preferred design mode of this scheme, for shape and the area of described reflective medium, it is preferable that be designed to the shape with the hot spot that LED/light source 1 is formed identical with area or substantially identical. Such as: for the LED/light source 1 of circle, its hot spot being formed on backboard 5 bottom surface 5-1 reflector plate 2 is roughly annular, as shown in Figure 2. Now, when designing reflective medium, it is preferable that reflective medium is also designed to annular, and the inner ring d diameter of annular reflective medium should slightly larger than the diameter d o of LED, shown in composition graphs 4, so that the laying of LED/light source 1 on backboard 5; The outer annular diameter D of reflective medium is preferably suitable with the outer annular diameter of hot spot, but usually should be less than 80mm, to avoid the volume reflection weakening the disperse light beyond spot area 6. Disperse light is formed in the hot spot being positioned on backboard 5 side 5-2 reflector plate 2, it is possible to determine the shape of reflective medium to be changed and area size according to the actual shape of hot spot and area size, to reduce the volume reflection of light in spot area.
LED/light source 1 is laid in the region that backboard 5 bottom surface 5-1 is positioned at annular reflective medium inner ring, and the reflector plate 2 at each LEDs light source 1 rear being laid on backboard 5 is done the local replacement process of above-mentioned reflective medium, reflection position beyond reflective medium is all covered with described reflector plate 2, namely reflector plate 2 and reflective medium closely splice, it is covered with the interior face of whole backboard 5, form full wafer echo area, to ensure enough light emission rates, meet the lighting requirement of liquid crystal panel 4.
In order to avoid that backlight center brightness is produced excessive impact, the LED/light source 1-1 being arranged in position, central zone is being carried out the process of its spot area 6-1 reflection characteristic amendment, preferably the reflection characteristic of this spot area 6-1 internal reflection medium is not made excessive change, namely select reflectivity lower than reflector plate 2 but higher than the material of other reflective mediums, it is laid in the spot area 6-1 that the disperse light that the LED/light source 1-1 being positioned at position, central zone sends is formed; For the spot area 6 of the disperse light formation that the LED/light source 1 of non-central regional location sends, it is possible to the material selecting reflectivity lower is laid in wherein, to reduce volume reflection further.
Scheme two, still shown in composition graphs 2, this scheme adopts the mode increasing ink layer on former reflector plate 2, revises the reflection characteristic in reflector plate 2 spot area 6, to reduce the volume reflection of light in spot area 6.
Specifically, can spray or printing-ink in the spot area 6 that each LED/light source 1 is formed on reflector plate 2, form the ink layer that shape is identical with area or substantially suitable with the shape of spot area 6 with area, reduce the reflectivity of this region 6 reflector plate 2 by ink layer.
As a kind of preferred design mode of this scheme, it is preferable that reflector plate 2 to be covered with the interior face of whole backboard 5, namely comprise bottom surface 5-1 and surrounding side 5-2, only needing the position perforate installing LED/light source 1, so that the installation of LED/light source 1 on backboard 5 is fixed. When LED/light source 1 is circular, its hot spot being formed on backboard 5 bottom surface 5-1 reflector plate 2 is roughly annular, as shown in Figure 2. Now, it is possible to the ink layer of printing or spraying annular on reflector plate 2, and the inner ring d diameter of annular ink layer should slightly larger than the diameter d o of LED, shown in composition graphs 4, so that the laying of LED/light source 1 on backboard 5; The outer annular diameter D of ink layer is preferably suitable with the outer annular diameter of hot spot, but usually should be less than 80mm, to avoid the volume reflection weakening the disperse light beyond spot area 6.Hot spot disperse light being formed on the reflector plate 2 being positioned at backboard 5 side 5-2, it is possible to determine the shape of ink layer to be sprayed or to print and area size according to the actual shape of hot spot and area size, to reduce the volume reflection of light in spot area.
Same, when the LED/light source 1-1 being positioned at position, central zone being carried out the amendment of its spot area 6-1 reflection characteristic, the thickness of the ink layer sprayed or be printed in this spot area 6-1 should be less than in other spot area 6 thickness of the ink layeies formed, thus make the reflectivity being positioned at the spot area 6-1 of central position higher than the reflectivity of other position spot area 6, to avoid, backlight center brightness is produced excessive impact.
Scheme three, shown in Figure 3, this scheme is in order to reduce the reflection characteristic of spot area 6, adopt the mode offering breach 7 in the spot area 6 formed on reflector plate 2 at every LEDs light source 1, reduce the area of this region reflector plate 2, and then reach the purpose of design reducing spot area 6 reflectivity.
, it is possible to according to the concrete adjustment demand of reflectivity, offer one or more breach 7 in each spot area 6, specifically described breach 7 is preferably advisable with bar v notch v, shown in composition graphs 3, Fig. 4. When multiple v notch vs 7 offered by needs, it is preferable that by the described parallel laying of multiple v notch vs 7, to improve manufacturability and aesthetics.
Same, in order to reduce the impact on backlight center brightness, the LED/light source 1-1 being arranged in position, central zone is being carried out the process of its spot area 6-1 reflection characteristic amendment, the number of the striped breach 7 being opened in this spot area 6-1 should be less than spot area 6-1 less than the region that the number or each striped breach 7 that are opened in striped breach in other spot area 6 surround, so that the reflectivity being positioned at the spot area 6-1 of central position is positioned at the reflectivity of the spot area 6 of non-central location higher than other, and then ensure the center brightness of liquid crystal panel 4.
After LCD product adopts the lamp shadow removing method of the present embodiment, achieve the Homogenization Treatments to reflection light, and then the light intensity making whole liquid crystal panel receive is even, ensureing under the prerequisite to liquid crystal panel uniform irradiation, can suitably reduce the use quantity of LED/light source or shorten the light mixing distance of LED/light source to diffuser plate, significantly reducing on the basis of LCD product complete machine cost, contributing to realizing the ultrathin design of product, it is to increase the taste of direct-light type LED backlight product.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, change, remodeling, interpolation or the replacement that those skilled in the art make in the essential scope of the present invention, also should belong to protection scope of the present invention.
Claims (4)
1. the lamp shadow removing method for direct LED backlight, it is characterised in that: utilize LED/light source direct projection diffuser plate; Utilize reflector plate that LED/light source shines directly into the disperse light beyond diffuser plate to reflect; Described disperse light forms spot area on described reflector plate; Reduce the reflectivity of the spot area of described reflector plate;
In described spot area, lay the reflective medium of reflectivity lower than described reflector plate, reduced the reflectivity of light in spot area by described reflective medium; Described reflective medium is annular, and the annular diameters of annular reflective medium is greater than the diameter of LED/light source, and outer annular diameter is less than 80mm;It is laid on backboard by described LED/light source to be positioned at the region of annular reflective medium inner ring.
2. the lamp shadow removing method for direct LED backlight according to claim 1, it is characterised in that: described reflective medium and reflector plate are stitched together, are laid on backboard and are covered with whole interior of backboard, form full wafer echo area.
3. the lamp shadow removing method for direct LED backlight according to claim 1 and 2, it is characterized in that: described LED/light source is provided with many, the reflectivity of the spot area that the reflectivity of the spot area that the LED/light source being positioned at position, central zone is formed is formed higher than other LED/light source.
4. a LCD product, comprises liquid crystal panel and backlight module, is provided with backboard, LED/light source and reflector plate in described backlight module; It is characterized in that: adopt the backlight module described in the lamp shadow removing method for direct LED backlight as claimed any one in claims 1 to 3 design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748323.4A CN103728775B (en) | 2013-12-31 | 2013-12-31 | For lamp shadow removing method and the LCD product of direct LED backlight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310748323.4A CN103728775B (en) | 2013-12-31 | 2013-12-31 | For lamp shadow removing method and the LCD product of direct LED backlight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103728775A CN103728775A (en) | 2014-04-16 |
| CN103728775B true CN103728775B (en) | 2016-06-08 |
Family
ID=50452917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310748323.4A Active CN103728775B (en) | 2013-12-31 | 2013-12-31 | For lamp shadow removing method and the LCD product of direct LED backlight |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103728775B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160004123A1 (en) * | 2014-07-02 | 2016-01-07 | Kabushiki Kaisha Toshiba | Image display apparatus |
| CN109164638B (en) * | 2018-10-17 | 2021-12-10 | 京东方科技集团股份有限公司 | Light emitting module, manufacturing method thereof and direct type backlight source |
| WO2021031578A1 (en) * | 2019-08-19 | 2021-02-25 | 海信视像科技股份有限公司 | Display apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821851A (en) * | 2005-02-18 | 2006-08-23 | Lg.菲利浦Lcd株式会社 | Direct type back light |
| CN101828067A (en) * | 2007-10-19 | 2010-09-08 | 夏普株式会社 | Lighting installation, display and television receiver |
| CN102494264A (en) * | 2011-08-31 | 2012-06-13 | 友达光电股份有限公司 | Backlight module and display device |
| CN203658711U (en) * | 2013-12-31 | 2014-06-18 | 青岛歌尔声学科技有限公司 | Direct type LED backlight module group capable of eliminating lamp shadow and liquid crystal product |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060072340A1 (en) * | 2004-09-29 | 2006-04-06 | Cheng-Min Liao | Backlight module and lcd apparatus |
-
2013
- 2013-12-31 CN CN201310748323.4A patent/CN103728775B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1821851A (en) * | 2005-02-18 | 2006-08-23 | Lg.菲利浦Lcd株式会社 | Direct type back light |
| CN101828067A (en) * | 2007-10-19 | 2010-09-08 | 夏普株式会社 | Lighting installation, display and television receiver |
| CN102494264A (en) * | 2011-08-31 | 2012-06-13 | 友达光电股份有限公司 | Backlight module and display device |
| CN203658711U (en) * | 2013-12-31 | 2014-06-18 | 青岛歌尔声学科技有限公司 | Direct type LED backlight module group capable of eliminating lamp shadow and liquid crystal product |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103728775A (en) | 2014-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203643721U (en) | Direct type LED backlight module capable of eliminating Mura and liquid crystal product | |
| CN103728774B (en) | Mura removing method and LCD product for direct LED backlight | |
| CN101681059B (en) | Illumination system, luminaire and backlighting unit | |
| JP5011151B2 (en) | Liquid crystal display equipment | |
| TWI341950B (en) | Lighting unit and liquid crystal display device using the lighting unit | |
| CN203658711U (en) | Direct type LED backlight module group capable of eliminating lamp shadow and liquid crystal product | |
| TWI422922B (en) | A planar lighting device, and a liquid crystal display device provided with the same | |
| CN102128377A (en) | LED light guide plate lamp assembly | |
| CN103818131B (en) | A kind of method of printing-ink site on reflector plate | |
| KR20060046432A (en) | Direct type back light module | |
| US20130050989A1 (en) | Backlight Module and Display Device Thereof | |
| CN101737655A (en) | Lighting device including translucent cover for diffusing light from light source | |
| EP3033745B1 (en) | A lighting device | |
| CN103728775B (en) | For lamp shadow removing method and the LCD product of direct LED backlight | |
| CN102954404B (en) | The display device of lighting unit and this lighting unit of use | |
| CN105333334A (en) | LED light bar and liquid crystal display module | |
| CN103032817A (en) | Dodging lens, backlight module using dodging lens and display device | |
| CN103732974A (en) | Planar illumination light source apparatus using light emitter | |
| US8690407B2 (en) | Illumination unit and display apparatus using the same | |
| CN106500021B (en) | Light inlet has the automobile Rear Position Lamp guide structure of coupling device | |
| CN102980104A (en) | Backlight module and display device utilizing same | |
| CN105676521A (en) | Liquid crystal display module | |
| CN205656425U (en) | Exposing lamp and exposure machine that has concatenation formula light source | |
| CN102954369B (en) | The display device of lighting unit and this lighting unit of use | |
| JP2004253354A (en) | Surface type lighting 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 |