CN106773325B - Local dimming type ultrathin backlight module and display device - Google Patents
Local dimming type ultrathin backlight module and display device Download PDFInfo
- Publication number
- CN106773325B CN106773325B CN201710148955.5A CN201710148955A CN106773325B CN 106773325 B CN106773325 B CN 106773325B CN 201710148955 A CN201710148955 A CN 201710148955A CN 106773325 B CN106773325 B CN 106773325B
- Authority
- CN
- China
- Prior art keywords
- plate
- light
- module
- backlight module
- light guide
- 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
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a local dimming type ultrathin backlight module which comprises a plurality of connected back panel modules, light bars, light guide films and a diffusion plate, wherein each back panel module comprises a bearing plate which is obliquely arranged relative to the diffusion plate, each bearing plate is provided with one light guide film, the inclined end of each bearing plate far away from the diffusion plate is fixedly provided with one light bar, and the light emitting direction of each light bar faces to the light guide film. The invention also discloses a display device. According to the invention, a plurality of backboard modules are spliced together, each backboard module is provided with the bearing plate which is obliquely arranged, seamless splicing of the light guide films can be realized by arranging the small light guide films on each bearing plate, the design requirement of a large-scale backlight module can be met, the thin design with larger size can be realized, the difficulty that a large-scale light guide plate is difficult to manufacture can be overcome, the local dimming function can be better realized, and better optical performance is realized.
Description
Technical Field
The invention relates to the technical field of display, in particular to a local dimming type ultrathin backlight module and a display device.
Background
The backlight module is one of the key components of the display device, and is used for supplying sufficient light sources with uniform brightness and distribution, so that the display device can normally display images.
The backlight module is divided into a direct type and a side type according to the structural form. The direct type backlight module is characterized in that the backlight source is uniformly arranged behind the liquid crystal panel and is used as a light emitting source, so that the backlight can be uniformly transmitted to the whole screen; the side-in type backlight module is characterized in that side-in type light sources are arranged around a light guide plate, the light sources irradiate from the side surface, and generated light is emitted from a light emitting surface at the top of the light guide plate and then is transmitted to a picture.
The direct type backlight module has the advantages that the picture details are finer and more vivid, the direct type backlight module has good light-emitting visual angle, high utilization rate, simpler structure and lower cost, is widely used in a liquid crystal television, but has thicker integral size and is not easy to thin; the side-in backlight module has the advantages that the thickness can be well reduced, the ultrathin appearance is favorably realized, the image quality is lost to a certain extent, the local dimming cannot be performed, and the backlight module is difficult to be suitable for backlights with any sizes.
With the maturity of the television market, the market not only approaches to large screen display, but also people have higher and higher requirements for the image quality and the appearance design of products, such as ultra-thin appearance, Local dimming, and the like, so how to better integrate ultra-thin appearance and better Local dimming function on a large screen is a key point of research in the industry.
Disclosure of Invention
In view of the defects in the prior art, the invention provides a local dimming type ultrathin backlight module and a display device, so that the backlight module and the display device have ultrathin appearances and better local dimming functions, and good display effects can be ensured.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an ultra-thin backlight unit of local light mode, is including a plurality of backplate modules, lamp strip, leaded light membrane and the diffuser plate that link to each other, every the backplate module include for the loading board that the diffuser plate slope set up, every be provided with a slice on the loading board leaded light membrane, and every the loading board is keeping away from the slope end of diffuser plate is fixed with one the lamp strip, the light-emitting direction orientation of lamp strip leaded light membrane.
As one embodiment, the backplane module includes the carrier plate, a support plate supported on a side of the carrier plate away from the diffuser plate; each light bar corresponding to the light guide film is attached to the adjacent support plate of the back plate module.
As one embodiment, each of the backplane modules further includes a bottom plate for carrying the loading plate and the supporting plate, and the bottom plates of all the backplane modules are coplanar.
In one embodiment, all of the bottom plates are integrally formed to form a fixing plate disposed in parallel with the diffusion plate.
As an embodiment, all the bearing plates are inclined towards the same side.
As one embodiment, the carrier plate, the supporting plate and the bottom plate of each backplane module are fixed relatively.
As another embodiment, in each back plate module, two ends of the supporting plate are respectively hinged with the bearing plate and the bottom plate, and a hinge part is further arranged in the middle of each supporting plate; the hinge portion is hinged to a free end of the carrier plate of the adjacent backplane module.
As one embodiment, the local dimming type ultra-thin backlight module further includes a supporting pillar, and the supporting pillar is fixed on the surface of the carrier plate and penetrates through the light guiding film.
In one embodiment, the free ends of the support posts extend to abut against the back of the diffuser plate.
The invention aims to provide a display device which comprises the local dimming type ultrathin backlight module.
According to the invention, a plurality of backboard modules are spliced together, each backboard module is provided with the bearing plate which is obliquely arranged, seamless splicing of the light guide films can be realized by arranging the small light guide films on each bearing plate, the design requirement of a large-scale backlight module can be met, the thin design with larger size can be realized, the difficulty that a large-scale light guide plate is difficult to manufacture can be overcome, the local dimming function can be better realized, and better optical performance is realized.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a backplane module according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of another backlight module according to embodiment 1 of the invention.
Fig. 4 is a schematic structural diagram of a backplane module according to embodiment 2 of the present invention.
Fig. 5 is a schematic structural diagram of a backlight module according to embodiment 2 of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The local dimming type ultrathin backlight module has the advantages of a direct type backlight source and a side type backlight source, can easily realize local dimming and ensure a good display effect, has ultrathin appearance, and can be suitable for the modular splicing design of a large backlight module. The backlight module comprises a plurality of back panel modules, light bars, light guide films and diffusion plates which are connected, wherein the diffusion plates are arranged above the back panel modules, each back panel module comprises a bearing plate which is obliquely arranged relative to the diffusion plates, a light guide film is arranged on each bearing plate, a light bar is fixed at the inclined end of each bearing plate far away from the diffusion plates, and the light emergent direction of each light bar faces the light guide films.
Example 1
Referring to fig. 1, the display device of the present embodiment includes a local dimming type ultrathin backlight module and a display panel 1 disposed on a light-emitting surface above the local dimming type ultrathin backlight module, the local dimming type ultrathin backlight module includes a plurality of connected backplane modules 10, a light bar 20, a light guiding film 30 and a diffusion plate 40, each backplane module 10 includes a bearing plate 11 disposed in an inclined manner relative to the diffusion plate 40, a light guiding film 30 is disposed on each bearing plate 11, and a light bar 20 is fixed on each bearing plate 11 at an inclined end far away from the diffusion plate 40, the light-emitting direction of the light bar 20 faces the light guiding film 30, specifically, the light bar 20 is designed as an LED light source, and the LED light source faces a side wall of the light.
Because backlight unit's light guide structure is designed into to be formed by the concatenation of polylith leaded light membrane, the loaded down with trivial details and the high difficult preparation technology of large-size light guide structure in the jumbo size display device has been avoided, and, here still with the also simultaneous modular design of backplate module, only need according to actual need adjust the backplate module, the quantity of lamp strip and leaded light membrane can, realize backlight unit's modular assembly, no matter how large size backlight demand can all satisfy in theory, the preparation degree of difficulty of product has been reduced, and the compatibility of product has been promoted.
Fig. 2 is a schematic structural diagram of the backplane module of this embodiment. As one embodiment, the back panel module 10 has a supporting plate 11, a supporting plate 12 supported on a side of the supporting plate 11 away from the diffusion plate 40, and a bottom plate 13a for supporting the supporting plate 11 and the supporting plate 12, and the light bar 20 corresponding to each light guiding film 30 is attached to the supporting plate 12 of the adjacent back panel module 10. The light bar 20 is fixed on the surface of the support plate 12, facing the light guiding film 30 disposed on the support plate 11, the light guiding film 30 can process the light emitted from the light bar 20 and then emit the processed light to the diffusion plate 40.
In this embodiment, all the assembled backplane modules 10 are fixed on the same plane, and the bottom plates 13a are disposed in a coplanar manner, in this embodiment, all the bottom plates 13a are integrally manufactured to form the fixing plate 13 disposed in parallel with the diffusion plate 40.
As shown in fig. 2, the supporting plate 11, the supporting plate 12 and the bottom plate 13a of each backplane module 10 are fixed relatively, the supporting plate 11 and the supporting plate 12 are fixed on the bottom plate 13a respectively, the three enclose a closed triangular supporting structure, the supporting plate 11 has a fixed inclination angle, all the supporting plates 11 incline towards the same side, the inclination angle is in the range of 5 ° to 45 ° as best, and it can be ensured that the light exiting from the light guiding film 30 attached to the supporting plate 11 substantially covers the surface of the diffusion plate 40.
In addition, a layer of reflective layer 60 is further disposed between the bearing plate 11 and the light guiding film 30, and the reflective layer 60 can be fabricated on the surface of the bearing plate 11, or integrally formed with the light guiding film 30, or formed as a layer alone, for reflecting the light at the bottom of the light guiding film 30 back to the light guiding film 30, thereby improving the light utilization rate.
When the backlight module works, the light bar 20 emits light, light enters from the side wall of the light guiding film 30 and then is transmitted in the light guiding film 30, and is emitted from the light emitting surface at the top after being reflected for multiple times by the reflecting layer 60, and then is used as the backlight source of the display panel 1 after being subjected to light homogenizing treatment by the diffusion plate 40, and finally a display picture is formed.
As shown in fig. 3, as another embodiment of the present invention, on the basis of the above-mentioned backlight module, the backlight module further has a supporting column 50, the supporting column 50 is fixed on the surface of each of the bearing plates 11 and penetrates through the light guiding film 30, specifically, one end of the supporting column 50 is engaged with the bearing plate 11 of the backlight module 10, and the middle portion of the supporting column passes through the light guiding film 30 to limit the light guiding film 30, so as to prevent the light guiding film 30 from being dislocated or deviated. The supporting posts 50 are preferably transparent, for example, made of a transparent polymer resin material, so as to avoid affecting the light propagation path. Further, it is preferable that the supporting columns 50 have a tapered or wedge-shaped structure, the sharp free ends of the supporting columns 50 extend and abut against the back of the diffusion plate 40, the plurality of supporting columns 50 support the diffusion plate 40 simultaneously, and the contact area between a single supporting column 50 and the diffusion plate 40 is small, so as to prevent the display effect from being affected by the occurrence of obvious local light spots on the contact surface.
It should be noted that the projections of two adjacent light guide films 30 on the bottom plate 13a at least partially overlap, so that the light guide films 30 are seamlessly spliced, and the light bar 20 is shielded by the light guide films 30 on the adjacent back panel modules 10. Specifically, the light bar 20 is shielded by the carrier plate 11 of the adjacent back panel module 10. In the backplane module 10, the supporting plate 12 is not connected to the end of the supporting plate 11, but connected to a position close to the end of the supporting plate 11, so that the supporting plate 11 is divided by the supporting plate 12 into a main body part close to the bottom plate 13a and an extending part 110 far away from the bottom plate 13a, and the extending part 110 of the supporting plate 11 is shielded above the adjacent light bar 20, thereby preventing the light emitted by the light bar from directly emitting to the diffusion plate 40 to generate local bright stripes.
Example 2
As shown in fig. 4, unlike embodiment 1, in each back board module 10 of this embodiment, two ends of the supporting board 12 are respectively hinged to the supporting board 11 and the bottom board 13a, and a hinge portion 12a is further disposed in the middle of each supporting board 12, and as shown in fig. 5, the hinge portion 12a of the back board module 10 is hinged to the free end of the supporting board 11 of the adjacent back board module 10. Make bottom plate 13a, backup pad 12, loading board 11 of a backplate module 10 and the backup pad 12 of adjacent backplate module 10 constitute link mechanism, when carrying out local dimming, can change the inclination of loading board 11 through push-and-pull backup pad 12 to change the light-emitting direction of leaded light membrane 30, cooperate the independent drive mode of single lamp strip 20 to adjust luminance ultra-thin backlight unit, the inclination of these loading boards 11 is preferred unanimous, the dimming effect of this kind of embodiment is better.
In summary, the plurality of back plate modules are spliced together, each back plate module is provided with the obliquely arranged bearing plate, the seamless splicing of the light guide films can be realized by arranging the small light guide films on the bearing plates, the design requirement of a large-scale backlight module can be met, the thinning design with larger size can be realized, the difficulty that a large-scale light guide plate is difficult to manufacture can be overcome, the local dimming function can be better realized, and the optical performance is better.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (6)
1. A local dimming type ultrathin backlight module is characterized by comprising a plurality of connected backboard modules (10), light bars (20), light guide films (30) and a diffusion plate (40), wherein each backboard module (10) comprises a bearing plate (11) which is obliquely arranged relative to the diffusion plate (40), a piece of light guide film (30) is arranged on each bearing plate (11), one light bar (20) is fixed at the oblique end, far away from the diffusion plate (40), of each bearing plate (11), and the light emergent direction of each light bar (20) faces towards the light guide films (30); the backplane module (10) comprises the carrier board (11), a support board (12) supported on the carrier board (11) at a side away from the diffuser plate (40), and a bottom plate (13a) for carrying the carrier board (11) and the support board (12), the bottom plates (13a) of all the backplane modules (10) being coplanar; the light bar (20) corresponding to each light guide film (30) is attached to the support plate (12) of the adjacent backboard module (10); in each backboard module (10), two ends of the supporting plate (12) are respectively hinged with the bearing plate (11) and the bottom plate (13a), a hinged part (12a) is further arranged in the middle of each supporting plate (12), and the hinged part (12a) is hinged with the free end of the bearing plate (11) of the adjacent backboard module (10).
2. The ultra-thin backlight module of claim 1, wherein all the bottom plates (13a) are integrally formed to form a fixing plate (13) disposed in parallel with the diffusion plate (40).
3. The ultra-thin backlight module with local dimming function as claimed in claim 1, wherein all the carrier plates (11) are inclined towards the same side.
4. The ultra-thin backlight module with local dimming function as claimed in any one of claims 1 to 3, further comprising a supporting pillar (50), wherein the supporting pillar (50) is fixed on the surface of the carrier board (11) and penetrates through the light guiding film (30).
5. The ultra-thin backlight module with local dimming function as claimed in claim 4, wherein the free ends of the supporting posts (50) extend to abut against the back of the diffuser plate (40).
6. A display device comprising the local dimming ultra-thin backlight module of any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710148955.5A CN106773325B (en) | 2017-03-14 | 2017-03-14 | Local dimming type ultrathin backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710148955.5A CN106773325B (en) | 2017-03-14 | 2017-03-14 | Local dimming type ultrathin backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106773325A CN106773325A (en) | 2017-05-31 |
| CN106773325B true CN106773325B (en) | 2020-05-19 |
Family
ID=58960997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710148955.5A Active CN106773325B (en) | 2017-03-14 | 2017-03-14 | Local dimming type ultrathin backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106773325B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109471302A (en) * | 2018-12-25 | 2019-03-15 | 中航华东光电有限公司 | A kind of bottom back lighting device with visual angle deflection |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1704817A (en) * | 2004-06-01 | 2005-12-07 | 住友橡胶工业株式会社 | Light emitting device and liquid crystal display device |
| CN102003641A (en) * | 2009-08-26 | 2011-04-06 | Lg伊诺特有限公司 | Backlight unit and display apparatus using thereof |
| CN202216081U (en) * | 2011-07-29 | 2012-05-09 | 北京京东方光电科技有限公司 | Back light source capable of adjusting light locally and liquid crystal display module |
-
2017
- 2017-03-14 CN CN201710148955.5A patent/CN106773325B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1704817A (en) * | 2004-06-01 | 2005-12-07 | 住友橡胶工业株式会社 | Light emitting device and liquid crystal display device |
| CN102003641A (en) * | 2009-08-26 | 2011-04-06 | Lg伊诺特有限公司 | Backlight unit and display apparatus using thereof |
| CN202216081U (en) * | 2011-07-29 | 2012-05-09 | 北京京东方光电科技有限公司 | Back light source capable of adjusting light locally and liquid crystal display module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106773325A (en) | 2017-05-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8581942B2 (en) | Backlight unit for liquid crystal display device and driving method of the same | |
| US20120262645A1 (en) | Backlight Module and Liquid Crystal Display Employing Same | |
| TWI401507B (en) | Backlight module and display apparatus | |
| CN104964213B (en) | Backlight module and liquid crystal display | |
| US9222664B2 (en) | Backlight unit and display device | |
| CN103017038A (en) | Direct type backlight source and display device | |
| US8477264B2 (en) | Liquid crystal module and liquid crystal display device | |
| CN105044983A (en) | Backlight module and liquid crystal display device | |
| CN202158424U (en) | Backlight module and liquid crystal display apparatus | |
| WO2016194716A1 (en) | Edge-lit backlight device and liquid crystal display device | |
| CN109613752B (en) | Backlight module and display device | |
| CN109507822A (en) | Backlight module and liquid crystal display device | |
| WO2019100961A1 (en) | Flexible lcd module and assembly method thereof | |
| CN104503125A (en) | Plastic frame, backlight module and liquid crystal panel | |
| CN103091899A (en) | Display device and backlight module thereof | |
| US9529174B2 (en) | Diffuser plate assembly, backlight and display device | |
| KR102016517B1 (en) | Backlight unit and display device including the same | |
| CN203131706U (en) | Light guide plate, backlight module and display device | |
| CN106773325B (en) | Local dimming type ultrathin backlight module and display device | |
| US20120300139A1 (en) | Planar lighting apparatus and liquid crystal display having the same | |
| KR20100056161A (en) | Diffuser plate and display device having the same | |
| CN108572483A (en) | Down straight aphototropism mode set and liquid crystal display device | |
| CN102902089B (en) | A kind of display device | |
| CN209928188U (en) | Display device | |
| CN109358451B (en) | Backlight module and display device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |