CN203240400U - Backlight module and liquid crystal display device using same - Google Patents
Backlight module and liquid crystal display device using same Download PDFInfo
- Publication number
- CN203240400U CN203240400U CN2013201457689U CN201320145768U CN203240400U CN 203240400 U CN203240400 U CN 203240400U CN 2013201457689 U CN2013201457689 U CN 2013201457689U CN 201320145768 U CN201320145768 U CN 201320145768U CN 203240400 U CN203240400 U CN 203240400U
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- light
- backlight module
- light absorption
- bar
- lgp
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model discloses a backlight module and a liquid crystal display device. The backlight module comprises a light guide plate and a light bar, wherein the light-exiting surface of the light guide plate is provided with regularly distributed microstructures; the light bar is arranged at one side of the light guide plate and is opposite to the light-entering surface of the light guide plate; the light guide plate is provided with a light absorption strip at the edge of the light-exiting surface adjacent to the light-entering side of the light guide plate; the light absorption strip at least extends to the light-emitting surface of the light bar so as to cover a light coupling area between the light bar and the light-entering side of the light guide plate. According to the backlight module and the liquid crystal display device disclosed by the utility model, as the light absorption strip is arranged at the edge of the light-exiting surface of the light guide plate with the microstructures, light rays of a hotspot can be effectively absorbed, and therefore, the hotspot phenomenon of the edge is eliminated, and further, the display grade of the liquid crystal display device is improved. Meanwhile, the light absorption strip also can cover the light coupling area to avoid light leak. Under the condition that the hotspot phenomenon and the light leak are solved, the border of the liquid crystal display device can be made to be thinner, so that the hotspot phenomenon cannot occur.
Description
Technical field
The utility model relates to field of liquid crystal display, in particular, relates to a kind of backlight module and uses the liquid crystal indicator of this backlight module.
Background technology
Backlight module is used for providing the backlight of liquid crystal indicator so that liquid crystal panel can display frame.At present, the side entering-type LED backlight technology ultra-thin owing to having, can realize that the characteristics such as narrow frame are developed widely.
Be illustrated in figure 1 as a kind of liquid crystal indicator, periphery in the viewing area is provided with frame, the width of frame is W1, be illustrated in figure 2 as another kind of liquid crystal indicator, its border width is W2, wherein, W2 is much smaller than W1, and liquid crystal indicator shown in Figure 2 can provide better visual experience for spectators, more can incorporate in the environment of TV programme, thereby more welcome.The width size of liquid crystal indicator frame depends on the structure of backlight module to a great extent.
Be illustrated in figure 3 as a kind of liquid crystal display module (comprising backlight module and liquid crystal panel) structure of liquid crystal indicator, comprise: housing 101, center 102, aluminium extruded 103, backboard 104, reflector plate 105, LGP 106, blooming piece 107, liquid crystal panel 108 and LED lamp bar 110, described center 102 is provided with barricade 109 for the coupling light zone (being that LED lamp light-emitting area is to the distance areas of LGP incidence surface) of covering between LGP 106 and the LED lamp bar 110, cover coupling light zone to avoid occuring light leak by barricade 109, but, because the demand of narrow frame, the design of center 102 is also more and more narrow, thereby so that the machining accuracy of center can't satisfy the demand of narrow frame.
In addition, narrow frame causes the A value of backlight module more and more less, as shown in Figure 4, the A value for the LED light-emitting area to the liquid crystal indicator viewing area length of (being the AA district), namely be illustrated in figure 1 as the LED light-emitting area to the distance on the interior edge of center 102; Because reducing of A value, the problem of bringing is the generation of focal point (hotspot) phenomenon, edge in the viewing area of liquid crystal indicator (being the AA district), the light that LED sends penetrates with certain angle, can occur between a plurality of LED light according to less than the zone form blanking bar, and the place that light intersects forms optically focused, namely the LED mixed light is inhomogeneous, such one bright one phenomenon of arranging from top to bottom that secretly replaces is focal point phenomenon (being also referred to as the firefly phenomenon) and bright line, has had a strong impact on the optics taste of backlight module and the display effect of liquid crystal indicator.
The utility model content
Technical problem to be solved in the utility model provides the good backlight module of a kind of narrow frame and display effect and uses the liquid crystal indicator of this backlight module.
The purpose of this utility model is achieved through the following technical solutions: a kind of backlight module comprises:
LGP, exiting surface are provided with the micro-structural of regular distribution;
The lamp bar is arranged on a side of described LGP, and is relative with the incidence surface of described LGP;
The exiting surface edge that described LGP is adjacent with its light inlet side is provided with the light absorption bar, and described light absorption bar extends to the light-emitting area of described lamp bar at least to hide the coupling light zone between described lamp bar and the described LGP light inlet side.
Preferably, described light absorption bar is arranged on the below of the blooming piece of described backlight module.To avoid light to expose from blooming piece.
Preferably, the described light absorption bar width 0.3mm at least that hides described LGP exiting surface fringe region.Can effectively absorb light at the edge of LGP like this, effectively eliminate focal point with this.
Preferably, described light absorption bar is that absorptivity is at the black more than 30% or grey strip material.Can effectively eliminate focal point like this.
Preferably, described light absorption bar is poly terephthalic acid class plastics.This optical absorption of materials better performances, price is comparatively cheap.
Preferably, described light absorption bar is attached to the exiting surface edge of described LGP.The sticking position that the edge of LGP can provide.
Preferably, described light absorption bar is attached on the described lamp bar.The light absorption bar can be attached on the pcb board of lamp bar, thereby can avoid at patch materials such as LGP use glue.
Preferably, described light absorption bar is provided with an attaching section for the PCB that is attached at described lamp bar.Can improve like this area of attachment of light absorption bar and then improve and attach reliability.
Preferably, described light absorption bar is attached to the lower surface of described blooming piece.Can make like this blooming piece is namely to attach simultaneously the light absorption bar again, thereby simplifies the assembling process of backlight module.
A kind of liquid crystal indicator comprises above-mentioned backlight module.
The utility model is because the exiting surface of LGP is provided with micro-structural, and the exiting surface edge that LGP is adjacent with its light inlet side is provided with the light absorption bar, and described light absorption bar extends to the light-emitting area of described lamp bar at least to hide the coupling light zone between described lamp bar and the described LGP light inlet side.The light absorption bar is arranged on the LGP exiting surface edge with micro-structural, because the light absorption bar has higher absorptivity, the light that LED can be incided the absorbing strip direction effectively absorbs, can effectively absorb the light of focal point, thereby eliminate the optically focused phenomenon (hotspot) of edge, and then improve the demonstration grade of liquid crystal display, simultaneously, the light absorption bar can also cover coupling light zone, avoids light leak.In the situation that optically focused phenomenon and light leak are all solved, it is thinner and can not produce the optically focused phenomenon that the frame of liquid crystal indicator then can be done.If other coupling light designs, the light of the bright dark inequality of LED lamp bar outgoing distributes, can be returned by the surface reflection of high reflection, still can keep the light of bright dark inequality to distribute when entering LGP, optically focused phenomenon (hotspot) is obvious, simultaneously, if design without barricade, light directly enters the diaphragm end face easily, causes light leak.
Description of drawings
Fig. 1 is a kind of structural representation of liquid crystal indicator,
Fig. 2 is the structural representation of another kind of liquid crystal indicator,
Fig. 3 is the liquid crystal display module structural representation of existing a kind of liquid crystal indicator,
Fig. 4 is the optically focused phenomenon schematic diagram of liquid crystal indicator,
Fig. 5 is the structural representation of the liquid crystal display module of the utility model embodiment one,
Fig. 6 is the structural representation of the liquid crystal display module of the utility model embodiment two,
Fig. 7 is the LGP of the utility model embodiment two and the allocation plan of light absorption bar,
Fig. 8 is the partial enlarged drawing of A among Fig. 8,
Fig. 9 is the second set-up mode of the light absorption bar described in the utility model embodiment two,
Figure 10 is the third set-up mode of the light absorption bar described in the utility model embodiment two.
Wherein: 101, housing, 102, center, 103, aluminium extruded, 104, backboard, 105, reflector plate, 106, LGP, 107, blooming piece, 108, liquid crystal panel, 109, barricade, 110, LED lamp bar, 111, the black printing layer, 112, the light absorption bar.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and preferred embodiment.
Embodiment one
As shown in Figure 5, present embodiment provides a kind of structure of new liquid crystal display module, comprise: backlight module and liquid crystal panel 108, described backlight module comprises: backboard 104, be arranged on the reflector plate 105 in the backboard 104, be arranged on the LGP 106 on the reflector plate 105, be arranged on the blooming piece 107 on the LGP 106, be arranged on the LED lamp bar 110 of LGP light inlet side, for the aluminium extruded 103 that 110 heat radiations of LED lamp bar are provided and for each assembly in the backboard is carried out spacing center 102.Described liquid crystal panel 108 is arranged on the described center 102, and described liquid crystal panel 108 is pressed in it on described center 102 by described housing 101.
In the present embodiment, one of blooming piece 107 bottommosts is provided with black printing layer 111, the width of described black printing layer 111 is 3-5mm, extend to the light-emitting area of lamp bar 110 to hide the coupling light zone between lamp bar 110 and the LGP 106, thereby avoid light to propagate into by top, coupling light zone light leak occurs on the panel.But the printing of this black printing layer 111 is expensive, and its price has accounted for seventy percent of blooming piece price, thereby has improved the production cost of backlight module.In addition, although black printing layer 111 can stop the generation of light leak, can not eliminate the optically focused phenomenon (hotspot) that appears at the viewing area, the display effect of liquid crystal indicator still is affected.
Embodiment two
Shown in Fig. 6-8, what present embodiment and embodiment one were different is, the exiting surface of LGP 106 is provided with the prism structure (as shown in Figure 8) of parallel arrangement, the LGP 106 exiting surface edges adjacent with its light inlet side are provided with light absorption bar 112, and described light absorption bar 112 extends to the light-emitting area of described lamp bar 110 at least to hide the coupling light zone between described lamp bar 110 and the described LGP 106 light inlet sides.
In the present embodiment, at the exiting surface of LGP 106 reason that micro-structural cooperates light absorption bar 112 to use being set is, after the smooth LGP without micro-structural of exiting surface arranges the light absorption bar, described glue frame zone (being center) is covered with edge's optically focused phenomenon aggravation of liquid crystal panel, and also there is the optically focused phenomenon in the place that hides without black PET bar, but not aggravation.Because when black PET attaches on the smooth LGP of exiting surface, contact area is much larger with respect to having the micro-structural LGP, so that the original inner total reflection of the light of LED outgoing at this contact-making surface place is subject to heavy damage, light scattering goes out LGP, and then causes optically focused phenomenon (hotspot) aggravation.And the LGP 106 that the surface has micro-structural can be eliminated the situation of optically focused phenomenon aggravation, and can reduce the generation of optically focused phenomenon or the degree of reduction optically focused phenomenon.
In the present embodiment, the micro-structural on LGP 106 surfaces can be the wedge angle prism structure, also can be the prism structure of fillet, perhaps the stereochemical structure such as pyramid structure all can, preferably uniformly discharge capacity on the exiting surface of LGP, so that bright dipping is even.
In the present embodiment, described light absorption bar 112 is arranged on the below of the blooming piece 107 of described backlight module, exposes from blooming piece to avoid light.The width that light absorption bar 112 hides described LGP 106 exiting surface fringe regions is at least 0.3mm or more than the 0.3mm.Can effectively absorb light at the edge of LGP 106 like this, effectively eliminate focal point (hotspot) with this.In addition, described light absorption bar 112 is that absorptivity is at the black more than 30% or grey strip material, can effectively eliminate focal point with this, for this reason, present embodiment is selected poly terephthalic acid class plastics (PET), this optical absorption of materials better performances, and price is comparatively cheap, and very little as its area of light absorption bar, almost can ignore its cost.
In the present embodiment, adopt black PET bar as light absorption bar (absorptivity〉90%), because it has absorption to light, so the inventor tests this, to confirm its impact.Test with structure shown in Figure 7, experimental result is: after adding this black PET, about 1%, therefore can think basic not impact on the impact of the briliancy of backlight module.
In the present embodiment, as shown in Figure 6, described light absorption bar 112 is attached to the exiting surface edge of described LGP 106, and the contact area of the edge of LGP 106 and light absorption bar 112 is larger, thereby the sticking position that can provide.Certainly, as shown in Figure 9, described light absorption bar 112 also can be attached on the pcb board of described lamp bar 110, thereby can avoid at patch materials such as LGP 106 use glue, this set method then is preferably in and is provided with an attaching section for the PCB that is attached at described lamp bar on the light absorption bar 112, as shown in FIG., so that the cross section of light absorption bar 112 is L-shaped, can improves like this area of attachment of light absorption bar and then improve the attaching reliability.As shown in figure 10, described light absorption bar 112 can also be attached to the lower surface of described blooming piece 107.Attach simultaneously the light absorption bar in the time of can making blooming piece 107 more like this, thereby simplify the assembling process of backlight module.
As the backlight module after improving, present embodiment provides a kind of liquid crystal indicator of using this backlight module simultaneously, to improve the display effect of liquid crystal indicator, after having used above-mentioned backlight module, display effect and the grade of liquid crystal indicator are improved, elimination optically focused phenomenon (hotspot) or bright line, in the case, so that the frame of liquid crystal indicator can design thinlyyer, and then further improve spectators' visual experience.
Above content is in conjunction with concrete preferred embodiment further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (10)
1. a backlight module is characterized in that, comprising:
LGP, exiting surface are provided with the micro-structural of regular distribution;
The lamp bar is arranged on a side of described LGP, and is relative with the incidence surface of described LGP;
The exiting surface edge that described LGP is adjacent with its light inlet side is provided with the light absorption bar, and described light absorption bar extends to the light-emitting area of described lamp bar at least to hide the coupling light zone between described lamp bar and the described LGP light inlet side.
2. backlight module as claimed in claim 1 is characterized in that, described light absorption bar is arranged on the below of the blooming piece of described backlight module.
3. backlight module as claimed in claim 1 is characterized in that, the width that described light absorption bar hides described LGP exiting surface fringe region is 0.3mm at least.
4. backlight module as claimed in claim 1 is characterized in that, described light absorption bar is that absorptivity is at the black more than 30% or grey strip material.
5. backlight module as claimed in claim 4 is characterized in that, described light absorption bar is poly terephthalic acid class plastics.
6. backlight module as claimed in claim 1 is characterized in that, described light absorption bar is attached to the exiting surface edge of described LGP.
7. backlight module as claimed in claim 1 is characterized in that, described light absorption bar is attached on the described lamp bar.
8. backlight module as claimed in claim 7 is characterized in that, described light absorption bar is provided with an attaching section for the PCB that is attached at described lamp bar.
9. backlight module as claimed in claim 1 is characterized in that, described light absorption bar is attached to the lower surface of blooming piece.
10. a liquid crystal indicator is characterized in that, comprises arbitrary described backlight module such as claim 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201457689U CN203240400U (en) | 2013-03-28 | 2013-03-28 | Backlight module and liquid crystal display device using same |
| PCT/CN2013/073779 WO2014153790A1 (en) | 2013-03-28 | 2013-04-07 | Backlight module and liquid crystal display apparatus using backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201457689U CN203240400U (en) | 2013-03-28 | 2013-03-28 | Backlight module and liquid crystal display device using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203240400U true CN203240400U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201457689U Expired - Lifetime CN203240400U (en) | 2013-03-28 | 2013-03-28 | Backlight module and liquid crystal display device using same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN203240400U (en) |
| WO (1) | WO2014153790A1 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103823319A (en) * | 2014-03-10 | 2014-05-28 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device using same |
| CN104464534A (en) * | 2014-12-10 | 2015-03-25 | 深圳市华星光电技术有限公司 | Display module and display device with same |
| CN105683789A (en) * | 2013-11-26 | 2016-06-15 | 堺显示器制品株式会社 | Backlight device and display device |
| WO2016107090A1 (en) * | 2015-01-04 | 2016-07-07 | 京东方科技集团股份有限公司 | Light guide plate, backlight source and display device |
| CN105759505A (en) * | 2016-05-13 | 2016-07-13 | 青岛海信电器股份有限公司 | Backlight module and liquid crystal display device |
| CN106352272A (en) * | 2016-08-22 | 2017-01-25 | 深圳市华星光电技术有限公司 | Side entry type backlight module and display device for improving taste |
| WO2017024756A1 (en) * | 2015-08-11 | 2017-02-16 | 京东方科技集团股份有限公司 | Light bar, backlight module and assembly method thereof, and display device |
| CN108333666A (en) * | 2018-02-01 | 2018-07-27 | 苏州向隆塑胶有限公司 | The manufacturing method of backlight module, the assemble method of backlight module and light guide plate |
| CN108766248A (en) * | 2018-08-07 | 2018-11-06 | 奥捷科技（厦门）有限公司 | Display device and manufacturing method thereof |
| CN109828411A (en) * | 2019-02-22 | 2019-05-31 | 信利光电股份有限公司 | A kind of backlight |
| CN111123582A (en) * | 2019-12-28 | 2020-05-08 | 苏州视达讯远电子科技有限公司 | Side-entry high-brightness backlight module convenient for heat dissipation |
| KR102405870B1 (en) * | 2021-09-24 | 2022-06-08 | (주)상도전기 | Led lighting apparatus using light guide plate |
| CN114859456A (en) * | 2022-05-07 | 2022-08-05 | 深圳市宏普欣电子科技有限公司 | Backlight module of leak protection light |
| CN115167036A (en) * | 2022-09-08 | 2022-10-11 | 惠科股份有限公司 | Backlight module and display device |
| US11815710B1 (en) | 2023-06-19 | 2023-11-14 | HKC Corporation Limited | Backlight module and display device |
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| JP2002357823A (en) * | 2001-05-31 | 2002-12-13 | Optrex Corp | Backlight for liquid crystal display element |
| WO2004076917A1 (en) * | 2003-01-29 | 2004-09-10 | Mitsubishi Rayon Co., Ltd. | Area light source |
| CN200965602Y (en) * | 2006-07-07 | 2007-10-24 | 科桥电子股份有限公司 | Improved rubber frame structure for backlight module |
| JP4807205B2 (en) * | 2006-09-19 | 2011-11-02 | オムロン株式会社 | Surface light source device |
| TWM416108U (en) * | 2011-06-03 | 2011-11-11 | Wistron Corp | Backlight module with light shielding function and display apparatus thereof |
| JP5663434B2 (en) * | 2011-08-15 | 2015-02-04 | 株式会社ジャパンディスプレイ | Display device |
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2013
- 2013-03-28 CN CN2013201457689U patent/CN203240400U/en not_active Expired - Lifetime
- 2013-04-07 WO PCT/CN2013/073779 patent/WO2014153790A1/en active Application Filing
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105683789A (en) * | 2013-11-26 | 2016-06-15 | 堺显示器制品株式会社 | Backlight device and display device |
| CN103823319B (en) * | 2014-03-10 | 2016-03-09 | 深圳市华星光电技术有限公司 | Backlight module and the liquid crystal indicator with this backlight module |
| CN103823319A (en) * | 2014-03-10 | 2014-05-28 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device using same |
| CN104464534A (en) * | 2014-12-10 | 2015-03-25 | 深圳市华星光电技术有限公司 | Display module and display device with same |
| US10267974B2 (en) | 2015-01-04 | 2019-04-23 | Boe Technology Group Co., Ltd. | Light guide plate, backlight and display device |
| WO2016107090A1 (en) * | 2015-01-04 | 2016-07-07 | 京东方科技集团股份有限公司 | Light guide plate, backlight source and display device |
| WO2017024756A1 (en) * | 2015-08-11 | 2017-02-16 | 京东方科技集团股份有限公司 | Light bar, backlight module and assembly method thereof, and display device |
| CN105759505A (en) * | 2016-05-13 | 2016-07-13 | 青岛海信电器股份有限公司 | Backlight module and liquid crystal display device |
| CN105759505B (en) * | 2016-05-13 | 2019-03-26 | 青岛海信电器股份有限公司 | A kind of backlight module and liquid crystal display |
| CN106352272A (en) * | 2016-08-22 | 2017-01-25 | 深圳市华星光电技术有限公司 | Side entry type backlight module and display device for improving taste |
| CN106352272B (en) * | 2016-08-22 | 2019-09-17 | 深圳市华星光电技术有限公司 | A kind of side entrance back module and display device improving taste |
| CN108333666A (en) * | 2018-02-01 | 2018-07-27 | 苏州向隆塑胶有限公司 | The manufacturing method of backlight module, the assemble method of backlight module and light guide plate |
| CN108766248A (en) * | 2018-08-07 | 2018-11-06 | 奥捷科技（厦门）有限公司 | Display device and manufacturing method thereof |
| CN109828411A (en) * | 2019-02-22 | 2019-05-31 | 信利光电股份有限公司 | A kind of backlight |
| CN111123582A (en) * | 2019-12-28 | 2020-05-08 | 苏州视达讯远电子科技有限公司 | Side-entry high-brightness backlight module convenient for heat dissipation |
| KR102405870B1 (en) * | 2021-09-24 | 2022-06-08 | (주)상도전기 | Led lighting apparatus using light guide plate |
| CN114859456A (en) * | 2022-05-07 | 2022-08-05 | 深圳市宏普欣电子科技有限公司 | Backlight module of leak protection light |
| CN115167036A (en) * | 2022-09-08 | 2022-10-11 | 惠科股份有限公司 | Backlight module and display device |
| US11815710B1 (en) | 2023-06-19 | 2023-11-14 | HKC Corporation Limited | Backlight module and display device |
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| Publication number | Publication date |
|---|---|
| WO2014153790A1 (en) | 2014-10-02 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CX01 | Expiry of patent term |
Granted publication date: 20131016 |