CN104791665A - Backlight module, display device and diffusion plate - Google Patents
Backlight module, display device and diffusion plate Download PDFInfo
- Publication number
- CN104791665A CN104791665A CN201510199743.0A CN201510199743A CN104791665A CN 104791665 A CN104791665 A CN 104791665A CN 201510199743 A CN201510199743 A CN 201510199743A CN 104791665 A CN104791665 A CN 104791665A
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- China
- Prior art keywords
- diffuser plate
- interior angle
- inclined plane
- backlight module
- exiting surface
- 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.)
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module, a display device and a diffusion plate so as increase the light utilization rate of prisms in the backlight module and improve the display effect of the display device. The backlight module comprises a light guide plate, a light source, the diffusion plate and the prisms, wherein the light source is located at the side where the light incident surface of the light guide plate is located, the diffusion plate is located at the side where the light emergent surface of the light guide plate is located, and the prisms are located at the side where the light emergent surface of the light guide plate is located. The light emergent surface of the diffusion plate is provided with a plurality of protrusions. Each protrusion is provided with a first bevel and a first interior angle, wherein the first interior angle is larger than 60 degrees and smaller than 120 degrees, and the first interior angle is formed by the first bevel and the light emergent surface of the diffusion plate.
Description
Technical field
The present invention relates to display technology field, particularly a kind of backlight module, display unit and diffuser plate.
Background technology
The backlight module of current liquid crystal indicator is mainly divided into straight-down negative and side entering type, mainly comprises light source and diffuser plate.
As depicted in figs. 1 and 2, wherein: Fig. 1 is the back light module unit structure schematic diagram under prior art, Fig. 2 is the structural representation of the diffuser plate under prior art, the optics framework of the backlight under prior art is prism 01 from top to bottom, diffuser plate 02, light guide plate 03 etc., as shown in Figure 1, the angle of light angle a of outgoing after light guide plate 03 that light source 04 is launched is approximately 60 degree ~ 85 degree, diffuser plate 02 surface coating multiple protruding 05 under prior art, and each protruding 05 is the symmetrical structure of dome-type, be radiated at from the light of light guide plate 03 outgoing the light angle b be radiated at prism 01 reflected after projection 05 and be approximately 40 degree ~ 50 degree, and prism is when being 30 degree to the angle of the light incided on it, light efficiency utilization rate is the highest, visible diffuser plate light efficiency utilization rate of the prior art is lower.
Summary of the invention
The invention provides a kind of backlight module, display unit and diffuser plate, in order to improve in backlight module prism to the utilization rate of light, and then improve the display effect of display unit.
For achieving the above object, the invention provides following technical scheme:
The invention provides a kind of backlight module, comprise: light guide plate, be positioned at the side, incidence surface place of described light guide plate light source, be positioned at the diffuser plate of the side, exiting surface place of described light guide plate and be positioned at the prism of side, exiting surface place of described diffuser plate, the exiting surface of described diffuser plate is provided with multiple projection, and each projection has the first inclined plane and the first interior angle, and described first interior angle is greater than 60 degree and is less than 120 degree, wherein: described first interior angle is angle formed by the exiting surface of the first inclined plane and described diffuser plate.
Backlight module provided by the invention, by changing the structure of the unit of the exiting surface coating of diffuser plate, the exiting surface of diffuser plate is provided with the projection of multiple dissymmetrical structure, and projection has the first inclined-plane and the first interior angle, and the first interior angle is greater than 60 degree and is less than 120 degree, make the light inciding diffuser plate after the first inclined-plane refraction, can to become the angle close to 30 degree to inject prism with prism towards the one side of diffuser plate, because of prism be about 30 degree to the angle of the light incided on it time, light efficiency utilization rate is the highest, compared with prior art, diffuser plate provided by the invention, make angle into the light injecting prism closer to 30 degree.
So backlight module provided by the invention, can to improve in backlight module prism to the utilization rate of light, and then improves the display effect of display unit.
In some optional embodiments, the refractive index of each described projection is greater than 1.47.The material of diffuser plate is generally polyethylene terephthalate, and its refractive index is generally 1.47, in order to reflect, therefore through computational analysis, protruding refractive index need be greater than 1.47, preferably, time in the scope of 1.4 ~ 1.6, inject the angle of prism through diffuser plate closer to 30 degree.
In some optional embodiments, each described projection also comprises the second inclined plane and the second interior angle, and described second inclined plane and described first inclined plane are oppositely arranged, described second interior angle is less than described first interior angle, wherein: described second interior angle is angle formed by the exiting surface of the second inclined plane and described diffuser plate.
In some optional embodiments, the one side thrown one's back out described in each from the exiting surface of described diffuser plate is arc.The upper surface of arc is convenient to make, and is not easy the film layer structure damaging its top.
Present invention also offers a kind of display unit, comprising: the backlight module described in above-mentioned any one.Because above-mentioned backlight module can to improve in backlight module prism to the utilization rate of light, therefore display unit provided by the invention has good display effect.
Present invention also offers a kind of diffuser plate, the exiting surface of described diffuser plate is provided with multiple projection, and each projection has the first inclined plane and the first interior angle, and described first interior angle is greater than 60 degree and is less than 120 degree, wherein: described first interior angle is angle formed by the exiting surface of the first inclined plane and described diffuser plate.
In some optional embodiments, the refractive index of each described projection is greater than 1.47.The material of diffuser plate is generally polyethylene terephthalate, and its refractive index is generally 1.47, in order to reflect, therefore through computational analysis, protruding refractive index need be greater than 1.47, preferably, time in the scope of 1.4 ~ 1.6, inject the angle of prism through diffuser plate closer to 30 degree.
In some optional embodiments, each described projection also comprises the second inclined plane and the second interior angle, and described second inclined plane and described first inclined plane are oppositely arranged, described second interior angle is less than described first interior angle, wherein: described second interior angle is the exiting surface angulation of the second inclined plane and described diffuser plate.
In some optional embodiments, the one side thrown one's back out described in each from the exiting surface of described diffuser plate is arc.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a part of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the back light module unit structure schematic diagram under prior art;
Fig. 2 is the structural representation of the diffuser plate under prior art;
Fig. 3 is back light module unit structure schematic diagram provided by the invention;
Fig. 4 is the structural representation of diffusion provided by the invention.
In figure:
01-prism 02-diffuser plate
03-light guide plate 04-light source
05-is protruding
1-light guide plate 2-light source
3-diffuser plate 4-is protruding
41-first inclined plane 42-second inclined plane
5-prism c-first interior angle
D-second interior angle
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.
Embodiment one
As shown in Figure 3, Fig. 3 is back light module unit structure schematic diagram provided by the invention; The invention provides a kind of backlight module, comprise: light guide plate 1, be positioned at the side, incidence surface place of light guide plate 1 light source 2, be positioned at the diffuser plate 3 of the side, exiting surface place of light guide plate 1 and be positioned at the prism 5 of side, exiting surface place of diffuser plate 3, the exiting surface of diffuser plate 3 is provided with multiple protruding 4, and each protruding 4 have the first inclined plane 41 and the first interior angle c, and the first interior angle c is greater than 60 degree and is less than 120 degree, wherein: the first interior angle c is angle formed by the exiting surface of the first inclined plane 41 and diffuser plate 3.
Backlight module provided by the invention, by changing the structure of the unit of the exiting surface coating of diffuser plate 3, the exiting surface of diffuser plate 3 is provided with the projection 4 of multiple dissymmetrical structure, and on protruding 4, there is the first inclined-plane 41 and the first interior angle c, and the first interior angle c is greater than 60 degree and is less than 120 degree, make the light inciding diffuser plate 3 after the first inclined-plane 41 reflects, can to become the angle close to 30 degree to inject prism 5 with prism 5 towards the one side of diffuser plate 3, because of prism 5 be about 30 degree to the angle of the light incided on it time, light efficiency utilization rate is the highest, compared with prior art, diffuser plate provided by the invention, make angle into the light injecting prism closer to 30 degree.
So backlight module provided by the invention, can to improve in backlight module prism to the utilization rate of light, and then improves the display effect of display unit.
It should be noted that, the exiting surface of diffuser plate is the one side of diffuser plate towards prism, and incidence surface is the one side of diffuser plate towards light guide plate.
Further, each refractive index of protruding 4 is greater than 1.47.Such as: refractive index can be 1.47,1.48,1.49,1.5,1.52,1.54,1.55,1.56,1.57,1.58,1.6 etc., the material of diffuser plate is generally polyethylene terephthalate, its refractive index is generally 1.47, in order to reflect, therefore through computational analysis, protruding refractive index need be greater than 1.47, preferably, time in the scope of 1.4 ~ 1.6, inject the angle of prism through diffuser plate closer to 30 degree.
In a kind of concrete embodiment, each protruding 4 also comprise the second inclined plane 42 and the second interior angle d, and the second inclined plane 42 and the first inclined plane 41 are oppositely arranged, the second interior angle d is less than the first interior angle c, wherein: the second interior angle d is angle formed by the exiting surface of the second inclined plane 42 and diffuser plate 3.
The concrete shape of above-mentioned each projection can have multiple, and its cross section can be triangle etc., just repeats no longer one by one here, in a kind of optional embodiment, as shown in Figure 4, Fig. 4 is the structural representation of diffusion provided by the invention, and each protruding 4 one sides deviating from the exiting surface of diffuser plate are arc.The upper surface of arc is convenient to make, and is not easy the film layer structure damaging its top.
Embodiment two
Embodiments provide a kind of display unit, comprising: the backlight module according to any one of above-described embodiment one.Because above-mentioned backlight module can to improve in backlight module prism to the utilization rate of light, therefore display unit provided by the invention has good display effect.
Embodiment three
Embodiments provide a kind of diffuser plate, the exiting surface of diffuser plate is provided with multiple projection, and each protruding 4 have the first inclined plane 41 and the first interior angle c, and the first interior angle c is greater than 60 degree and is less than 120 degree, wherein: the first interior angle c is angle formed by the exiting surface of the first inclined plane 41 and diffuser plate 3.
Diffuser plate provided by the invention is applied in backlight module, by changing the structure of the unit of the exiting surface coating of diffuser plate 3, the exiting surface of diffuser plate 3 is provided with the projection 4 of multiple dissymmetrical structure, and on protruding 4, there is the first inclined-plane 41 and the first interior angle c, and the first interior angle c is greater than 60 degree and is less than 120 degree, make the light inciding diffuser plate 3 after the first inclined-plane 41 reflects, can to become the angle close to 30 degree to inject prism 5 with prism 5 towards the one side of diffuser plate 3, because of prism 5 be about 30 degree to the angle of the light incided on it time, light efficiency utilization rate is the highest, compared with prior art, diffuser plate provided by the invention, make angle into the light injecting prism closer to 30 degree.
So diffuser plate provided by the invention is applied in backlight module, prism can be improved in backlight module to the utilization rate of light, and then improve the display effect of display unit.
Further, each refractive index of protruding 4 is greater than 1.47.Such as: refractive index can be 1.47,1.48,1.49,1.5,1.52,1.54,1.55,1.56,1.57,1.58,1.6 etc., the material of diffuser plate is generally polyethylene terephthalate, its refractive index is generally 1.47, in order to reflect, therefore through computational analysis, protruding refractive index need be greater than 1.47, preferably, time in the scope of 1.4 ~ 1.6, inject the angle of prism through diffuser plate closer to 30 degree.
In a kind of concrete embodiment, each protruding 4 also comprise the second inclined plane 42 and the second interior angle d, and the second inclined plane 42 and the first inclined plane 41 are oppositely arranged, the second interior angle d is less than the first interior angle c, wherein: the second interior angle d is angle formed by the exiting surface of the second inclined plane 42 and diffuser plate 3.
The concrete shape of above-mentioned each projection can have multiple, and its cross section can be triangle etc., just repeats no longer one by one here, in a kind of optional embodiment, as shown in Figure 4, Fig. 4 is the structural representation of diffusion provided by the invention, and each protruding 4 one sides deviating from the exiting surface of diffuser plate are arc.The upper surface of arc is convenient to make, and is not easy the film layer structure damaging its top.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (9)
1. a backlight module, comprise: light guide plate, be positioned at the side, incidence surface place of described light guide plate light source, be positioned at the diffuser plate of the side, exiting surface place of described light guide plate and be positioned at the prism of side, exiting surface place of described diffuser plate, it is characterized in that, the exiting surface of described diffuser plate is provided with multiple projection, and each projection has the first inclined plane and the first interior angle, and described first interior angle is greater than 60 degree and is less than 120 degree, wherein: described first interior angle is angle formed by the exiting surface of the first inclined plane and described diffuser plate.
2. backlight module according to claim 1, is characterized in that, the refractive index of each described projection is greater than 1.47.
3. backlight module according to claim 2, it is characterized in that, each described projection also comprises: the second inclined plane and the second interior angle, and described second inclined plane and described first inclined plane are oppositely arranged, described second interior angle is less than described first interior angle, wherein: described second interior angle is angle formed by the exiting surface of the second inclined plane and described diffuser plate.
4. the backlight module according to any one of claims 1 to 3, is characterized in that, the one side thrown one's back out described in each from the exiting surface of described diffuser plate is arc.
5. a display unit, is characterized in that, comprising: the backlight module as described in any one of Claims 1 to 4.
6. a diffuser plate, it is characterized in that, the exiting surface of described diffuser plate is provided with multiple projection, and each projection has the first inclined plane and the first interior angle, and described first interior angle is greater than 60 degree and is less than 120 degree, wherein: described first interior angle is angle formed by the exiting surface of the first inclined plane and described diffuser plate.
7. diffuser plate according to claim 6, is characterized in that, the refractive index of each described projection is greater than 1.47.
8. diffuser plate according to claim 7, it is characterized in that, each described projection also comprises: the second inclined plane and the second interior angle, and described second inclined plane and described first inclined plane are oppositely arranged, described second interior angle is less than described first interior angle, wherein: described second interior angle is angle formed by the exiting surface of the second inclined plane and described diffuser plate.
9. the diffuser plate according to any one of claim 6 ~ 8, is characterized in that, the one side thrown one's back out described in each from the exiting surface of described diffuser plate is arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199743.0A CN104791665B (en) | 2015-04-23 | 2015-04-23 | Backlight module, display device and diffusion plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199743.0A CN104791665B (en) | 2015-04-23 | 2015-04-23 | Backlight module, display device and diffusion plate |
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| Publication Number | Publication Date |
|---|---|
| CN104791665A true CN104791665A (en) | 2015-07-22 |
| CN104791665B CN104791665B (en) | 2017-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510199743.0A Active CN104791665B (en) | 2015-04-23 | 2015-04-23 | Backlight module, display device and diffusion plate |
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| CN (1) | CN104791665B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108828840A (en) * | 2018-07-25 | 2018-11-16 | 武汉华星光电技术有限公司 | A kind of backlight module and liquid crystal display device |
| CN109581750A (en) * | 2019-02-01 | 2019-04-05 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN109923463A (en) * | 2016-11-09 | 2019-06-21 | 夏普株式会社 | Display device and head-mounted display |
| US10866352B1 (en) | 2019-07-10 | 2020-12-15 | Chicony Power Technology Co., Ltd. | Light emitting device |
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| CN1866057A (en) * | 2005-05-20 | 2006-11-22 | 三星电子株式会社 | Optical plate, backlight assembly and display device having the optical plate |
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| CN101430455A (en) * | 2007-11-07 | 2009-05-13 | 群康科技(深圳)有限公司 | Back light module unit and liquid crystal display device |
| CN101446656A (en) * | 2007-11-26 | 2009-06-03 | Lg电子株式会社 | Optical film and liquid crystal display including the optical film |
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| CN101644855A (en) * | 2008-08-04 | 2010-02-10 | 鸿富锦精密工业（深圳）有限公司 | Direct backlight module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109923463A (en) * | 2016-11-09 | 2019-06-21 | 夏普株式会社 | Display device and head-mounted display |
| CN109923463B (en) * | 2016-11-09 | 2021-04-06 | 夏普株式会社 | Display device and head-mounted display |
| CN108828840A (en) * | 2018-07-25 | 2018-11-16 | 武汉华星光电技术有限公司 | A kind of backlight module and liquid crystal display device |
| CN109581750A (en) * | 2019-02-01 | 2019-04-05 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
| CN109581750B (en) * | 2019-02-01 | 2021-08-31 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US10866352B1 (en) | 2019-07-10 | 2020-12-15 | Chicony Power Technology Co., Ltd. | Light emitting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104791665B (en) | 2017-05-10 |
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