CN102354013A - Light guide plate for liquid crystal display and backlight module using same - Google Patents
Light guide plate for liquid crystal display and backlight module using same Download PDFInfo
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- CN102354013A CN102354013A CN2011103057031A CN201110305703A CN102354013A CN 102354013 A CN102354013 A CN 102354013A CN 2011103057031 A CN2011103057031 A CN 2011103057031A CN 201110305703 A CN201110305703 A CN 201110305703A CN 102354013 A CN102354013 A CN 102354013A
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- guide plate
- light guide
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- liquid crystal
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 18
- 210000001370 mediastinum Anatomy 0.000 claims description 32
- 125000006850 spacer group Chemical group 0.000 claims 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005142 aphototropism Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
本发明涉及用于液晶显示的导光板。该导光板的四周为光入射面，其一侧面为出光面，另一侧面为底面，所述底面为对光线起散射作用的网点面；导光板内中部设有一条主纵隔条和二条以上的横隔条；位于外侧的横隔条外部的导光板内均布设有二条以上的短纵隔条；主纵隔条、二条以上的横隔条和二条以上的短纵隔条将导光板分隔成十个以上的小区域，十个以上的小区域使导光板上形成了十个以上独立的小出光面。本发明导光板具有多个出光面，如果某个出光面对应的显示区域亮度较低，通过降低该区域内侧边所属LED光源的驱动电流以使该区域发光亮度降低，节约能耗；同时，保证了侧出式背光模块能够实现区域调光，且保持了体积轻薄、成本低的优点。
The invention relates to a light guide plate for liquid crystal display. The four sides of the light guide plate are light incident surfaces, one side is the light output surface, and the other side is the bottom surface, and the bottom surface is a dot surface that scatters light; the inner middle of the light guide plate is provided with a main longitudinal strip and more than two strips. Transverse strips; two or more short longitudinal strips are evenly distributed in the light guide plate outside the outer transverse strips; the main longitudinal strip, more than two transverse strips and more than two short longitudinal strips divide the light guide plate into more than ten More than ten small areas form more than ten independent small light-emitting surfaces on the light guide plate. The light guide plate of the present invention has a plurality of light-emitting surfaces. If the brightness of a display area corresponding to a certain light-emitting surface is low, the driving current of the LED light source belonging to the inner side of the area is reduced to reduce the luminous brightness of the area and save energy consumption; at the same time , which ensures that the side-out backlight module can realize local dimming, and maintains the advantages of light and thin volume and low cost.
Description
Technical field
The invention belongs to technical field of liquid crystal display, what be specifically related to be used for liquid crystal display is that a kind of light guide plate of light source and the side that adopts this light guide plate go out formula module backlight with the light emitting diode.
Background technology
(Liquid Crystal Display LCD) through the development in 30 years, has become the mainstream technology of flat pannel display in liquid crystal display.Liquid crystal molecule itself is not luminous, needs the backlighted viewing area.At present the LCD backlight that uses mainly contain cold-cathode fluorescence lamp (Cold Cathode Fluorescent, CCFL) and light emitting diode (Light Emitting Diode, LED) two kinds.LED has advantages such as life-span length, environmental protection, response time is fast, just progressively enlarges in the application of field of liquid crystal display.
The fast response characteristic of LED has guaranteed on the LED-backlit module, can realize the irrealizable dynamic light adjustment technology of CCFL, with energy efficient, improves contrast.The dynamic light adjustment technology can be divided into overall light modulation and local dimming according to module luminance regulating method backlight.Overall situation light modulation is integrally-regulated backlight illumination, and local dimming then is to be divided into the zone that several can be controlled separately with backlight, adjusts each regional backlight illumination in real time according to display image.Compare with overall light modulation, the energy-saving effect of local dimming is better.But the local dimming technology mainly is applicable to down straight aphototropism mode set at present.Though also there is the researchist to propose to go out to side the local dimming of formula module backlight, owing to adopt general light guide plate, complex algorithm realizes difficulty, and energy-saving effect is undesirable.
Compare with down straight aphototropism mode set, side goes out that formula volume backlight is frivolous, LED quantity is few, control circuit is simple, cost is low, but owing to be difficult to local dimming, can't further cut down the consumption of energy.Go out formula module backlight in order the local dimming technology to be used for side; Give full play to the advantage that side goes out formula module backlight and local dimming technology; The present invention proposes a kind of light guide plate that can the subregion bright dipping; This light guide plate exiting surface no longer is an even brightness area source; But several can independently control the area source of brightness; The brightness of each area source can reach the purpose of energy efficient according to the display image content real time altering.
At present domestic patent about light guide plate mainly concentrates on the accurate Industrial Co., Ltd in letter Fujin, Shenzhen, like " light guide plate and use the backlight module of this light guide plate " (grant number: CN100395615C), " light guide plate " (grant number: CN100370283C), " light guide plate " (grant number: CN100445829C), " method for manufacturing light guide plate " (grant number: CN100419515C) etc.These patents all are site design and the manufacturing approaches about light guide plate, and the light guide plate of being invented all is to have only an exiting surface.(grant number: CN100498390C) that reflection function and light guide plate is integrated, light guide plate has an exiting surface to the patent that AU Optronics has " light guide plate ", and the light that sends still is a uniform surface light source.(grant number: CN101424387) relate to light guide plate mesh point design, purpose is in order to improve the light-emitting uniformity of area source to another patent " light guide plate " of Youda, and related light guide plate also is to have only an exiting surface.
Patent of invention " side light type LED back light dynamic partition the control method " (application number: 201010510536.X) proposed a kind of side that can be used in and gone out formula local dimming method backlight that Guangzhou Skyworth Flat Panel display Science and Technology Co., Ltd proposes.Led light source is arranged on four sides of light guide plate, and the emit beam zone that intersects of horizontal longitudinal direction led light source is the control area of these led light sources, realizes local dimming with this.This invention realizes the strength control of intersection region through complicated algorithm, and the light guide plate of use has an exiting surface.
Summary of the invention
In order to realize satisfying the local dimming algorithm, have the purpose that volume is frivolous, cost is low, energy consumption is low again, the present invention at first provides a kind of light guide plate of improving structure, and a kind of module backlight that uses this light guide plate is provided again.
Concrete technical solution is following:
Be the light guide plate of light entrance face around the light guide plate that is used for liquid crystal display comprises, a side of said light guide plate is an exiting surface, and the another side is the bottom surface; The bottom surface is for playing the site face of scattering process to light; The middle part is provided with a main mediastinum bar 300 in the light guide plate of bottom surface one side, and the two ends of main mediastinum bar 300 lay respectively at the both sides of the edge of light guide plate, and main mediastinum bar 300 is separated into two big zones with light guide plate; The two ends that the middle part is provided with the tabula bar 302 of tabula bar more than 302, two more than two perpendicular to main mediastinum bar 300 in the light guide plate of bottom surface one side lay respectively at the both sides of the edge in addition of light guide plate; The tabula bar 302 outside light guide plate that are positioned at the outside are laid with the short mediastinum bar 303 more than two; Article two, the short mediastinum bar 303 more than is all parallel with main mediastinum bar 300; And an end of short mediastinum bar 303 is connecting the lateral surface of tabula bar 302, and the other end is positioned at the edge of light guide plate; 303 of said main mediastinum bar 300, the tabula bar 302 more than two and the short mediastinums more than two are separated into the zonule more than ten with light guide plate; And make the zonule left-right symmetric in the two big zones, the imbricate of corresponding part on the above edge of the side in each zonule and the light guide plate; The zonule more than ten in the light guide plate makes and has formed independently little exiting surface more than ten on the light guide plate.
Be uniformly distributed with the led light source of connecting outside the said light guide plate edge that is used for liquid crystal display, and the above corresponding more than one led light source of edge of a side of each zonule.
The exiting surface of light guide plate of the present invention no longer is one, but has formed independently little exiting surface more than ten, can cooperate with the local dimming technology, goes out to realize the local dimming algorithm in the formula module backlight in side.
The concrete beneficial effect of the present invention is: because light guide plate has a plurality of exiting surfaces; If certain exiting surface corresponding display brightness is lower; Drive current that just can be through reducing led light source under this zone inner side edge was so that should reduce energy efficient by the zone luminosity.Because this light guide plate has a plurality of exiting surfaces, has guaranteed that side goes out the formula backlight module and can realize local dimming.Adopt the side of light guide plate of the present invention to go out the formula backlight module, both kept the advantage that volume is frivolous, cost is low, can pass through the effective energy efficient of local dimming technology simultaneously.
Description of drawings
Fig. 1 is a light conducting plate structure synoptic diagram of the present invention.
Fig. 2 is the A-A cutaway view Amplified image of Fig. 1.
Fig. 3 is the B-B cutaway view Amplified image of Fig. 1.
Fig. 4 goes out formula back light module unit structure synoptic diagram for the side of using light guide plate of the present invention.
Fig. 5 is the light conducting plate structure synoptic diagram with four tabula bars.
Fig. 6 is the A-A cutaway view Amplified image of Fig. 5.
Fig. 7 is the B-B cutaway view Amplified image of Fig. 5.
Sequence number among the last figure: light guide plate 30, main mediastinum bar 300, light played site face 301, tabula bar 302, the short mediastinum bar 303 of scattering process.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done explanation further through embodiment.
Embodiment 1:
Referring to Fig. 1, around comprising, the light guide plate that is used for liquid crystal display is the light guide plate 30 of light entrance face, and a side of light guide plate 30 is an exiting surface, and the another side is the bottom surface.The bottom surface of light guide plate 30 is for playing the site face 301 of scattering process to light; The middle part is fixed with a main mediastinum bar 300 in the light guide plate of bottom surface one side, and the two ends of main mediastinum bar 300 lay respectively at the both sides of the edge of light guide plate, and main mediastinum bar 300 is separated into two big zones with light guide plate, sees Fig. 2.The two ends that the middle part is provided with 302, two tabula bars 302 of two tabula bars perpendicular to main mediastinum bar 300 in the light guide plate of bottom surface one side lay respectively at the both sides of the edge in addition of light guide plate; Article two, it is all parallel with main mediastinum bar 300 to be laid with 303, two short mediastinum bars 303 of two short mediastinum bars in the light guide plate in tabula bar 302 outsides, sees Fig. 3, and an end of short mediastinum bar 303 connecting the lateral surface of tabula bar 302, and the other end is positioned at the edge of light guide plate.Main mediastinum bar 300, two tabula bars 302 and two short mediastinum bars 303 are separated into ten zonules with light guide plate 30; Be area B 1, area B 2, area B 3, area B 4, area B 5, area B 6, area B 7, area B 8, area B 9, area B 10; And make by main mediastinum bar 300 and cut apart the zonule left-right symmetric in the two big zones that form; Like area B 2 and area B 3 symmetries; Area B 5 and area B 6 symmetries are seen Fig. 4; The imbricate of corresponding part on the above edge of a side in each zonule and the light guide plate 30; Ten zonules in the light guide plate 30 make and have formed ten independently little exiting surfaces on the light guide plate.
Referring to Fig. 4; It is following to use this side that is used for the light guide plate of liquid crystal display to go out the formula back light module unit structure; Outside being used for the light guide plate edge of liquid crystal display, be uniformly distributed with the led light source of connecting; Wherein area B 1, area B 4, area B 7 and area B 10 all have led light source are arranged outside the both sides of the edge, and other a zone only lateral edges has led light source outward.
When needs reduce the emergent light of area B 2 on the light guide plate 30; Close the drive current of led light source L4, L5 and the L6 at area B 2 edges of flowing through; Just can make the outgoing intensity of the exiting surface of area B 2 be reduced to 0, reach the same energy-saving effect of direct-type backlight that adopts the local dimming technology.
Embodiment 2
Referring to Fig. 5, Fig. 6 and Fig. 7, light guide plate 30, one sides for light entrance face around the light guide plate that is used for liquid crystal display comprises are exiting surface, and the another side is the bottom surface; The bottom surface is for playing the site face 301 of scattering process to light.Be with the different of embodiment 1: be provided with perpendicular to main mediastinum bar 300 and be provided with six short mediastinum bars 303 in the outside light guide plate of the tabula bar 302 in 302, two outsides of four tabula bars two big region separation are become 22 zonules.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103057031A CN102354013A (en) | 2011-10-11 | 2011-10-11 | Light guide plate for liquid crystal display and backlight module using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103057031A CN102354013A (en) | 2011-10-11 | 2011-10-11 | Light guide plate for liquid crystal display and backlight module using same |
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| Publication Number | Publication Date |
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| CN102354013A true CN102354013A (en) | 2012-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103057031A Pending CN102354013A (en) | 2011-10-11 | 2011-10-11 | Light guide plate for liquid crystal display and backlight module using same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332139A (en) * | 2013-07-22 | 2015-02-04 | 联想(北京)有限公司 | Display device, electronic terminal and backlight control method |
| CN106094095A (en) * | 2016-08-12 | 2016-11-09 | 广州创维平面显示科技有限公司 | A kind of backlight module and liquid crystal display thereof |
| CN106646718A (en) * | 2016-10-20 | 2017-05-10 | 苏州向隆塑胶有限公司 | Lateral backlight module with section light emitting control, and display apparatus |
| CN109445014A (en) * | 2018-12-26 | 2019-03-08 | 联想(北京)有限公司 | Backlight module, electronic equipment and information processing method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928638A (en) * | 2005-09-05 | 2007-03-14 | 三星电子株式会社 | Liquid crystal display and method of controlling the same |
| KR20090026947A (en) * | 2007-09-11 | 2009-03-16 | 엘지전자 주식회사 | Liquid crystal display |
| CN101932968A (en) * | 2007-12-27 | 2010-12-29 | 三星Led株式会社 | Backlight unit for liquid crystal display device |
-
2011
- 2011-10-11 CN CN2011103057031A patent/CN102354013A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1928638A (en) * | 2005-09-05 | 2007-03-14 | 三星电子株式会社 | Liquid crystal display and method of controlling the same |
| KR20090026947A (en) * | 2007-09-11 | 2009-03-16 | 엘지전자 주식회사 | Liquid crystal display |
| CN101932968A (en) * | 2007-12-27 | 2010-12-29 | 三星Led株式会社 | Backlight unit for liquid crystal display device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332139A (en) * | 2013-07-22 | 2015-02-04 | 联想(北京)有限公司 | Display device, electronic terminal and backlight control method |
| CN104332139B (en) * | 2013-07-22 | 2017-11-28 | 联想(北京)有限公司 | A kind of display device, electric terminal and method for controlling backlight thereof |
| CN106094095A (en) * | 2016-08-12 | 2016-11-09 | 广州创维平面显示科技有限公司 | A kind of backlight module and liquid crystal display thereof |
| CN106646718A (en) * | 2016-10-20 | 2017-05-10 | 苏州向隆塑胶有限公司 | Lateral backlight module with section light emitting control, and display apparatus |
| CN109445014A (en) * | 2018-12-26 | 2019-03-08 | 联想(北京)有限公司 | Backlight module, electronic equipment and information processing method |
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Application publication date: 20120215 |