CN104121517A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN104121517A CN104121517A CN201310144629.9A CN201310144629A CN104121517A CN 104121517 A CN104121517 A CN 104121517A CN 201310144629 A CN201310144629 A CN 201310144629A CN 104121517 A CN104121517 A CN 104121517A
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- China
- Prior art keywords
- backlight module
- lgp
- triangular prism
- light source
- light
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Abstract
The invention relates to a backlight module. The backlight module comprises a light guide plate, a light source and an inverse prismatic lens, wherein the light guide plate is provided with an incident surface and an emergent surface, the light source is arranged on the incident surface, the inverse prismatic lens is opposite to the emergent surface and is provided with a first surface opposite to the emergent surface, a prism microstructure is formed on the first surface, and the prism microstructure is composed of multiple triangular prism protrusions which are parallel to one another and connected with one another.
Description
Technical field
The present invention relates to backlight module, relate in particular to a kind of backlight module with larger horizontal proliferation angle.
Background technology
Recently liquid crystal display is universal gradually, wherein backlight module (Back light module) is one of key part and component of panel of LCD (LCD panel), because liquid crystal itself is not luminous, the function of backlight module is well-off brightness and the light source being evenly distributed, normally show image.Backlight module is at present gradually by cold cathode ray tube (Cold Cathode Fluorescent Lamp, CCFL) transfer to and adopt light emitting diode (Light Emitting Diode, LED), utilize light emitting diode as backlight, to there is the advantages such as high brightness, low-power consumption, high color purity.
Utilize at present in the application of LED element as backlight module, be mainly divided under LGP, directly enter lower light emitting-type and LGP side light inlet type to light-conducting type backlight.Wherein under LGP, the full run-down type of light inlet type arranges backlight under display floater exiting surface,, because LED element is originally as spot light, directly descend the backlight module of light emitting-type easily in display frame, produce speck, color spot or the unequal phenomenon of bright dark areas and can increase module gross thickness.For addressing the above problem, develop the backlight at side direction light type side light inlet, being about to LED element arranges on the side of relative viewing area, utilize spot light conversion that the micro-structural of LGP side is sent LED to be line source and enter LGP inside, the line source of LGP internal delivery penetrates LGP upper surface via the optics cloth of LGP bottom (vertical glass) area source that the line source of horizontal direction (parallel glass) converts vertical direction to of naming a person for a particular job, and then through diffusion sheet, area source is done to uniform diffusion and atomizing effect.
But, when a plurality of people watch a display device jointly, due to the restriction in space, need everyone around display device, to watch, because the distribution in the horizontal direction of existing backlight module is relatively concentrated, thereby it is less to make to be positioned at the display brightness that the beholder of periphery sees, the effect that impact is watched.
Summary of the invention
In view of this, being necessary to provide a kind of can laterally have compared with the backlight module at Vernonia parishii Hook． F． angle.
A kind of backlight module, it comprises LGP, light source and inverse edge eyeglass, described LGP has incidence surface and exiting surface, described light source is arranged at described incidence surface, described inverse edge eyeglass is relative with described exiting surface, described inverse edge eyeglass has the first surface relative with described exiting surface, and described first surface is formed with prism microstructure, and described prism microstructure is a plurality of being parallel to each other and interconnective a plurality of triangular prism shaped projection.
With respect to prior art, when the light of the light source outgoing of the backlight module of the technical program passes through the deflection vertical direction of LGP, owing to being provided with inverse edge eyeglass, described light is incident to reversed prism structure, after transmitting refraction, from the second surface outgoing of inverse edge eyeglass, the shooting angle of light is offset to center position, thereby the longitudinal divergence angle of light source module is focused in positive visual angle, and the display unit that makes to use this backlight module laterally has brightness in a big way.
Accompanying drawing explanation
Fig. 1 is the backlight module schematic perspective view of the technical program.
Fig. 2 is the generalized section of the backlight module of Fig. 1.
Fig. 3 is the distributed intention of rising angle of the backlight module without inverse edge eyeglass of the technical program.
Fig. 4 is the distributed intention of rising angle of the backlight module with inverse edge eyeglass of the technical program.
Main element symbol description
| Backlight module | 100 |
| LGP | 10 |
| Light source | 20 |
| Inverse edge eyeglass | 30 |
| Incidence surface | 11 |
| Exiting surface | 12 |
| Groove | 131 |
| First surface | 31 |
| Second surface | 32 |
| Prism microstructure | 311 |
| Triangular prism shaped projection | 312 |
| The first side | 3121 |
| The second side | 3122 |
The following specific embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
The specific embodiment
Refer to Fig. 1 and Fig. 2, the backlight module 100 that first embodiment of the invention provides comprises a LGP 10, a plurality of light source 20 and an inverse edge eyeglass 30.
Described LGP 10 is and is roughly tabularly, and it has orthogonal incidence surface 11 and exiting surface 12.Described incidence surface 11 is relative with light source 20.
Described LGP 10 is made by light transmissive material, and the material of described LGP 10 can be two kinds or more of the formed mixture in Merlon (PC), polymethyl methacrylate (PMMA), methyl methacrylate, styrene copolymerized compound (MS), PET (PETG), polystyrene (PS) or above-mentioned material.
The exiting surface 12 of described LGP 10 is formed with diffusion micro-structural.Described diffusion micro-structural is a plurality ofly from exiting surface 12, to LGP 10 is inner, to form hemispheric groove 131.A plurality of grooves 131 are in exiting surface 12 array arrangements of LGP 10.Each groove 131 is 1 micron to 100 microns at the diameter of the opening of exiting surface 12, and the distance between two adjacent grooves 131 is 1 micron to 100 microns.
Be understandable that, the shape of described groove 131 is not limited to the hemispherical in the present embodiment, and its shape can be set according to the needs of optical design, as semielliptical shape etc., the effect of dispersing to reach better light.
Described incidence surface 11 is a side of tabular LGP 10.Described a plurality of light source 20 is oppositely arranged with exiting surface 12.Described a plurality of light source 20 spaced sets.Described light source 20 can be light emitting diode.
Be understandable that, the incidence surface 11 of described LGP 10 also can be provided with micro-structural, as is formed with semicircle shape projection or groove, and the light that is incident to LGP 10 to facilitate is dispersed more, thereby even in the interior luminous intensity of LGP 10.In addition, also can be using each side of LGP 10 all as incidence surface, thus in each side, be provided with light source, thus the luminous intensity that of backlight module promoted.
Described inverse edge eyeglass 30 is roughly tabular, and it is arranged at exiting surface 12 1 sides of LGP 10, and is arranged in parallel with LGP 10.Described inverse edge eyeglass 30 has relative first surface 31 and second surface 32.Described first surface 31 is relative with LGP 10.Described first surface 31 is formed with prism microstructure 311.Described prism microstructure 311 is parallel to each other and interconnective a plurality of triangular prism shaped protruding 312 for a plurality of, and each triangular prism shaped length direction of protruding 312 is parallel to horizontal direction.Described triangular prism shaped protruding 312 have interconnective the first side 3121 and the second side 3122, each triangular prism shaped longitudinal section of protruding 312 is isosceles triangle, angle theta between described the first side 3121 and the second side 3122 is 60 degree to 70 degree, the intersection of described the first side 3121 and the second side 3122 is parallel with first surface 31, and described the first side 3121 and the intersection of the second side 3122 and the distance H of first surface 31 are 1.3 microns to 5.5 microns.
That is to say, each is triangular prism shaped protruding 312 for a side side and first surface 31 in three sides of triangular prism overlap, the first side 3121 and the second side 3122 described in two other side of triangular prism is respectively.Described triangular prism shaped protruding 312 longitudinal section is isosceles triangle.The drift angle that is described isosceles triangle away from the angle of described first surface 31.The angle θ of described drift angle is 60 degree to 70 degree.Described isosceles triangle is 1.3 microns to 5.5 microns away from summit and the distance H between first surface of described first surface 31.
The second surface 32 of described inverse edge eyeglass 30 is plane.Be understandable that, in order to realize better optical effect, also can at second surface 32, make micro-structural as required.
Refer to Fig. 2, when the light of light source 20 outgoing passes through the deflection vertical direction of LGP 10, owing to being provided with inverse edge eyeglass 30, described light is incident to prism microstructure 131, after transmitting refraction, second surface 32 outgoing from inverse edge eyeglass 30, make the shooting angle of light be offset to center position, thereby the longitudinal divergence angle of light source module is focused in positive visual angle, and the display unit that makes to use this backlight module laterally has brightness in a big way.
Refer to Fig. 3, when not being provided with inverse edge eyeglass 30, when backlight module 100 only comprises LGP 10 and light source 20, the distribution angle of the light of its outgoing as shown in Figure 3.The light that is backlight module 100 outgoing has larger distribution angle in the direction of advance of light.Refer to Fig. 4, while being provided with inverse edge eyeglass 30 in backlight module 100, make the rising angle of backlight module 100 be parallel in the horizontal direction triangular prism shaped protruding 312 length direction, there is larger dispersion angle, thus can be so that the display unit that adopts this backlight module has brightness horizontal in a big way.
Be understandable that, those skilled in the art also can do other and change in spirit of the present invention, within all should being included in the present invention's scope required for protection.
Claims (7)
1. a backlight module, it comprises LGP, light source and inverse edge eyeglass, described LGP has incidence surface and exiting surface, described light source is arranged at described incidence surface, described inverse edge eyeglass is relative with described exiting surface, described inverse edge eyeglass has the first surface relative with described exiting surface, and described first surface is formed with prism microstructure, and described prism microstructure is a plurality of being parallel to each other and interconnective a plurality of triangular prism shaped projection.
2. backlight module as claimed in claim 1, is characterized in that, the length direction of described each triangular prism shaped projection is parallel to horizontal direction.
3. backlight module as claimed in claim 1, it is characterized in that, described triangular prism shaped projection has interconnective the first side and the second side, and the longitudinal section of each triangular prism shaped projection is isosceles triangle, and the angle theta between described the first side and the second side is 60 degree to 70 degree.
4. backlight module as claimed in claim 3, is characterized in that, the intersection of described the first side and the second side is parallel with first surface, and described the first side and the intersection of the second side and the distance of first surface are 1.3 microns to 5.5 microns.
5. backlight module as claimed in claim 1, is characterized in that, the exiting surface of described LGP is formed with diffusion micro-structural, and described diffusion micro-structural is the groove of the formation to LGP inside from exiting surface.
6. backlight module as claimed in claim 5, is characterized in that, described groove be shaped as semicircle or half elliptic.
7. backlight module as claimed in claim 1, is characterized in that, described inverse edge eyeglass also has the second surface relative with first surface, and described second surface is plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310144629.9A CN104121517A (en) | 2013-04-24 | 2013-04-24 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310144629.9A CN104121517A (en) | 2013-04-24 | 2013-04-24 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104121517A true CN104121517A (en) | 2014-10-29 |
Family
ID=51767051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310144629.9A Pending CN104121517A (en) | 2013-04-24 | 2013-04-24 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104121517A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965345A (en) * | 2015-07-13 | 2015-10-07 | 京东方科技集团股份有限公司 | Backlight module and display screen |
| CN105093392A (en) * | 2015-08-14 | 2015-11-25 | 青岛海信电器股份有限公司 | Light guide plate and liquid crystal display |
| CN105911760A (en) * | 2016-06-03 | 2016-08-31 | 京东方科技集团股份有限公司 | Lateral entrance type backlight module and display device |
| CN107229088A (en) * | 2017-08-07 | 2017-10-03 | 京东方科技集团股份有限公司 | Making side, leaded light component and the display device of optical microstructures and optical microstructures layer |
| WO2017186006A1 (en) * | 2016-04-26 | 2017-11-02 | 京东方科技集团股份有限公司 | Prismatic lens, preparation method therefor, backlight module, and vr display device |
| CN107544176A (en) * | 2016-06-27 | 2018-01-05 | 群创光电股份有限公司 | Display device |
| CN108388048A (en) * | 2018-03-13 | 2018-08-10 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN108732816A (en) * | 2018-05-22 | 2018-11-02 | 武汉华星光电技术有限公司 | Area source backlight module and liquid crystal display panel |
| CN109716352A (en) * | 2018-12-17 | 2019-05-03 | 深圳市汇顶科技股份有限公司 | Liquid crystal display fingerprint mould group shields lower fingerprint recognition system and electronic equipment |
| CN111007680A (en) * | 2019-11-25 | 2020-04-14 | 华为技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN111221069A (en) * | 2018-11-23 | 2020-06-02 | 群创光电股份有限公司 | Backlight module and light guide plate thereof and display device using backlight module |
| CN111427191A (en) * | 2019-08-30 | 2020-07-17 | 达运精密工业股份有限公司 | Backlight module and manufacturing method of light guide plate |
| CN112912791A (en) * | 2018-10-26 | 2021-06-04 | 华为技术有限公司 | Light guide for an electronic display and electronic display comprising said light guide |
| CN115047669A (en) * | 2022-08-16 | 2022-09-13 | 合肥泰沃达智能装备有限公司 | Reflective screen with built-in light source and preparation method thereof |
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| CN1916723A (en) * | 2005-08-19 | 2007-02-21 | 鸿富锦精密工业（深圳）有限公司 | Plate of guiding light, and backlight module |
| TW200905306A (en) * | 2007-07-16 | 2009-02-01 | Au Optronics Corp | Backlight module and liquid crystal display comprising the same |
| JP2010026436A (en) * | 2008-07-24 | 2010-02-04 | Mitsubishi Rayon Co Ltd | Lens sheet, surface light source device and liquid crystal display device |
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2013
- 2013-04-24 CN CN201310144629.9A patent/CN104121517A/en active Pending
Patent Citations (3)
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| CN1916723A (en) * | 2005-08-19 | 2007-02-21 | 鸿富锦精密工业（深圳）有限公司 | Plate of guiding light, and backlight module |
| TW200905306A (en) * | 2007-07-16 | 2009-02-01 | Au Optronics Corp | Backlight module and liquid crystal display comprising the same |
| JP2010026436A (en) * | 2008-07-24 | 2010-02-04 | Mitsubishi Rayon Co Ltd | Lens sheet, surface light source device and liquid crystal display device |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104965345A (en) * | 2015-07-13 | 2015-10-07 | 京东方科技集团股份有限公司 | Backlight module and display screen |
| CN105093392A (en) * | 2015-08-14 | 2015-11-25 | 青岛海信电器股份有限公司 | Light guide plate and liquid crystal display |
| WO2017186006A1 (en) * | 2016-04-26 | 2017-11-02 | 京东方科技集团股份有限公司 | Prismatic lens, preparation method therefor, backlight module, and vr display device |
| CN105911760A (en) * | 2016-06-03 | 2016-08-31 | 京东方科技集团股份有限公司 | Lateral entrance type backlight module and display device |
| CN107544176A (en) * | 2016-06-27 | 2018-01-05 | 群创光电股份有限公司 | Display device |
| US10809435B2 (en) | 2017-08-07 | 2020-10-20 | Boe Technology Group Co., Ltd. | Backlight unit, method for manufacturing the same and display device |
| CN107229088A (en) * | 2017-08-07 | 2017-10-03 | 京东方科技集团股份有限公司 | Making side, leaded light component and the display device of optical microstructures and optical microstructures layer |
| CN108388048A (en) * | 2018-03-13 | 2018-08-10 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN108388048B (en) * | 2018-03-13 | 2021-01-22 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN108732816A (en) * | 2018-05-22 | 2018-11-02 | 武汉华星光电技术有限公司 | Area source backlight module and liquid crystal display panel |
| US11656397B2 (en) | 2018-10-26 | 2023-05-23 | Huawei Technologies Co., Ltd. | Light guide for an electronic display and electronic display comprising said light guide |
| CN112912791A (en) * | 2018-10-26 | 2021-06-04 | 华为技术有限公司 | Light guide for an electronic display and electronic display comprising said light guide |
| CN111221069A (en) * | 2018-11-23 | 2020-06-02 | 群创光电股份有限公司 | Backlight module and light guide plate thereof and display device using backlight module |
| CN111221069B (en) * | 2018-11-23 | 2022-04-12 | 群创光电股份有限公司 | Backlight module and light guide plate thereof and display device using backlight module |
| CN109716352A (en) * | 2018-12-17 | 2019-05-03 | 深圳市汇顶科技股份有限公司 | Liquid crystal display fingerprint mould group shields lower fingerprint recognition system and electronic equipment |
| CN109716352B (en) * | 2018-12-17 | 2023-07-14 | 深圳市汇顶科技股份有限公司 | Liquid crystal display fingerprint module, under-screen fingerprint identification system and electronic equipment |
| CN111427191A (en) * | 2019-08-30 | 2020-07-17 | 达运精密工业股份有限公司 | Backlight module and manufacturing method of light guide plate |
| CN111427191B (en) * | 2019-08-30 | 2023-09-15 | 达运精密工业股份有限公司 | Backlight module and manufacturing method of light guide plate |
| CN111007680A (en) * | 2019-11-25 | 2020-04-14 | 华为技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN115047669A (en) * | 2022-08-16 | 2022-09-13 | 合肥泰沃达智能装备有限公司 | Reflective screen with built-in light source and preparation method thereof |
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Application publication date: 20141029 |