CN108279526A - Sidelight type backlight module - Google Patents
Sidelight type backlight module Download PDFInfo
- Publication number
- CN108279526A CN108279526A CN201711465701.2A CN201711465701A CN108279526A CN 108279526 A CN108279526 A CN 108279526A CN 201711465701 A CN201711465701 A CN 201711465701A CN 108279526 A CN108279526 A CN 108279526A
- Authority
- CN
- China
- Prior art keywords
- prismatic
- backlight module
- guide plate
- type backlight
- light guide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009792 diffusion process Methods 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0231—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having microprismatic or micropyramidal shape
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
-
- 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
- G02B6/0051—Diffusing sheet or layer
-
- 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
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
-
- 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
- G02B6/0055—Reflecting element, sheet or layer
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The present invention provides a kind of sidelight type backlight module, including light guide plate, positioned at the point light source of light guide plate side, the reflecting plate for being fitted in light guide plate lower surface, fitting light guide plate upper surface the first diffusion sheet and be fitted in the prismatic lens of the first diffusion sheet upper surface；The prismatic slot that the surface of prismatic lens is provided with the column prismatic being mutually parallel and is convexed to form by adjacent prismatic；The arragement direction for extending perpendicularly to point light source of prismatic；The height of prismatic between two neighboring point light source is different and is randomly provided.Using sidelight type backlight module provided by the invention, because the height random of the prismatic between two point light sources is arranged and different, so the light by prismatic lens is randomly reflected, under the premise of the uniform light degree for entering prismatic lens reaches pre-provisioning request, the uniform light degree projected from prismatic lens also just reaches the preset uniformity, avoids the problem that light intensity is unevenly distributed.
Description
Technical field
The present invention relates to technical field of liquid crystal display, more particularly to a kind of sidelight type backlight module.
Background technology
Because light source can be arranged in side, simple production process, the backlight module that liquid crystal display uses is mostly
Sidelight type backlight module.In order to improve real brightness and the color saturation of liquid crystal display, need to ensure going out for backlight module
The face luminous intensity of penetrating reaches certain requirement.To improve backlight module exit facet luminous intensity, the backlight module of the prior art is in addition to improving
Outside the power of light source, prismatic lens are also set on diffusion sheet, light is constrained in specific angular range using prismatic lens
It is interior, improve the utilization ratio of light.
In the case where the light source of backlight module is linear light source, preferably can ensure using the backlight module of prismatic lens
The uniform light degree of smooth surface；But if when changing light source into point light source, backlight module different zones are measured using illuminometer,
The numerical value of luminous intensity simultaneously differs；And the distribution of luminous intensity and the position distribution of point light source have correspondence.
Invention content
Light-emitting surface light intensity caused by prism Sheet structure to solve the problems, such as existing backlight module is non-uniform, this hair
It is bright that a kind of new sidelight type backlight module is provided.
The present invention provides a kind of sidelight type backlight module, including light guide plate, the point light source positioned at the light guide plate side, patch
It closes in the reflecting plate of the light guide plate lower surface, the first diffusion sheet of the fitting light guide plate upper surface and is fitted in described first
The prismatic lens of diffusion sheet upper surface；It is characterized in that
The surface of the prismatic lens is provided with the column prismatic being mutually parallel and by the adjacent prismatic shape
At prismatic slot；The arragement direction for extending perpendicularly to the point light source of the prismatic；
The height of the prismatic between the two neighboring point light source is different and is randomly provided.
Optionally, the upper and lower surface of the prismatic lens be both provided with the prismatic and by the prismatic it is convex
Act the prismatic slot formed.
Optionally, the corner angle angle of the prismatic is between 90 ° -110 °.
Optionally, the adjacent prismatic spacing is between 24.0um-110.0um.
Optionally, the prismatic lens include the layers of prisms of the substrate and acrylic resin material of PET materials；
The layers of prisms is bonded the substrate setting；
The prismatic is arranged in the layers of prisms.
Optionally, the sum of the substrate and the thickness of the layers of prisms are between 0.065mm-0.072mm.
Optionally, further include the second diffusion sheet for being bonded the prismatic lens upper surface.
Optionally, the light guide plate is wedge shape；
From close to the point light source side, to far from the point light source side, the thickness of the light guide plate is gradually reduced.
Using sidelight type backlight module provided by the invention because the height of the prismatic between two point light sources with
Machine be arranged and it is different, so the light by prismatic lens is randomly reflected, in the uniform light for entering prismatic lens
Under the premise of degree reaches pre-provisioning request, the uniform light degree projected from prismatic lens also just reaches the preset uniformity, avoids light
The problem of intensity distribution unevenness.
Description of the drawings
By reference to the following description in conjunction with the accompanying drawings and the contents of the claims, and with to the present invention more comprehensively
Understand, other objects and results of the present invention will be more clearly understood and understood.In the accompanying drawings：
Fig. 1 is the backlight module schematic cross-section that embodiment provides；
Fig. 2 is the Section A-A schematic diagram in Fig. 1；
Wherein：11- light guide plates, 12- point light sources, 13- reflecting plates, the first diffusion sheets of 14-, 15- prismatic lens, 151- prismatics are convex
It rises, 152- prismatic slots.
Identical label indicates similar or corresponding feature or function in all the appended drawings.
Specific implementation mode
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the backlight module schematic cross-section that embodiment provides；Fig. 2 is the Section A-A schematic diagram in Fig. 1.Such as Fig. 1 and
Shown in Fig. 2, sidelight type backlight module provided in this embodiment includes light guide plate 11, reflecting plate 13, the first diffusion sheet 14 and prism
Piece 15.
Wherein, point light source 12 is located at the side of light guide plate 11, and reflecting plate 13 is fitted in the lower surface of light guide plate 11, and first expands
It falls apart and is fitted in the upper surface of light guide plate 11, prismatic lens 15 are bonded the upper surface of the first diffusion sheet 14.The light that point light source 12 projects
After line enters light guide plate 11, the first diffusion sheet 14 is entered by the reflex and refraction action of light guide plate 11 and reflector plate
It is interior, prismatic lens 15 are entered after the scattering of the first diffusion sheet 14, and be limited in the angle of setting by prismatic lens 15.
In the present embodiment, 15 surface of prismatic lens of sidelight type backlight module is provided with the column prismatic being mutually parallel
151, prismatic slot 152 is formed between adjacent prismatic 151；The extending direction of prismatic 151 and prismatic slot 152 is vertical
In the arragement direction of point light source 12.In addition, in the present embodiment, prismatic 151 between two neighboring point light source 12
It is highly different, and height random is arranged.
Because the height random of the prismatic 151 between two point light sources 12 is arranged and different, through
The light for crossing prismatic lens 15 is randomly reflected, and reaches the premise of pre-provisioning request in the uniform light degree for entering prismatic lens 15
Under, the uniform light degree projected from prismatic lens 15 also just reaches the preset uniformity, avoids the problem that light intensity is unevenly distributed.
In embodiments of the present invention, only the upper surface of prismatic lens 15 be arranged prismatic 151 above-mentioned and by prismatic it is convex
Play the 151 prismatic slots 152 formed.In other embodiments, the upper and lower surface of prismatic lens 15 is both provided with aforementioned prismatic
Protrusion 151 and prismatic slot 152.
In the present embodiment, the corner angle angle of prismatic 151 can be preferably provided at 100 ° between 90 ° -110 °.Rib
The spacing of shape protrusion 151 can be between 24.0um-110.um.
More preferably, in the present embodiment, prismatic lens 15 can be include the substrate of PET materials and by acrylic resin material
The layers of prisms of matter；Layers of prisms is bonded aforesaid base plate, and prismatic 151 is arranged in aforementioned layers of prisms.Certainly, in other embodiment
In, prismatic lens 15 directly can also use the substrate manufacture of PET materials to form, and individual layers of prisms is no longer arranged.
On the basis of prismatic lens 15 are using substrate and layers of prisms composite structure, the sum of thickness of substrate and layers of prisms is preferred
Between 0.065mm-0.072mm.
In the present embodiment, prismatic lens 15 are the top layer of backlight module, in other embodiments, in the upper of prismatic lens 15
The second diffusion sheet can also be arranged in surface, and the light by prismatic lens 15 is made to avoid rib by the scattering appropriate again of the second diffusion sheet
Eyeglass 15 causes light intensity flaw.
In the present embodiment, light guide plate 11 is setting in homogeneous thickness, and in other embodiments, light guide plate 11 can also be wedge
Shape, and the side from close to the side of point light source 12 to far from point light source 12, the thickness of light guide plate 11 are gradually reduced.
Other than with aforementioned structure, plastic frame and encirclement of the light guide plate 11 provided in an embodiment of the present invention also with outside
The metal frame of plastic frame, so that aforementioned each pellet module can be fixed to each other and protect each pellet module.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. a kind of sidelight type backlight module, including light guide plate (11), the point light source (12) for being located at the light guide plate (11) side, patch
Conjunction is in the reflecting plate (13) of the light guide plate (11) lower surface, the first diffusion sheet (14) of fitting light guide plate (11) upper surface
With the prismatic lens (15) for being fitted in the first diffusion sheet (14) upper surface；It is characterized in that：
The surface of the prismatic lens (15) be provided with the column prismatic (151) being mutually parallel and by the adjacent prismatic it is convex
Play the prismatic slot (152) that (151) are formed；The row for extending perpendicularly to the point light source (12) of the prismatic (151)
Cloth direction；
The height of the prismatic (151) between the two neighboring point light source (12) is different and sets at random
It sets.
2. sidelight type backlight module according to claim 1, it is characterised in that：
It is both provided with the prismatic (151) in the upper and lower surface of the prismatic lens (15) and by the prismatic
(151) the prismatic slot (152) formed.
3. sidelight type backlight module according to claim 1 or 2, it is characterised in that：
The corner angle angle of the prismatic (151) is between 90 ° -110 °.
4. sidelight type backlight module according to claim 3, it is characterised in that：
The adjacent prismatic (151) spacing is between 24.0um-110.0um.
5. sidelight type backlight module according to claim 3, it is characterised in that：
The prismatic lens (15) include the layers of prisms of the substrate and acrylic resin material of PET materials；
The layers of prisms is bonded the substrate setting；
The prismatic (151) is arranged in the layers of prisms.
6. sidelight type backlight module according to claim 5, it is characterised in that：
The sum of the substrate and the thickness of the layers of prisms are between 0.065mm-0.072mm.
7. sidelight type backlight module according to claim 1 or 2, it is characterised in that：
It further include the second diffusion sheet for being bonded prismatic lens (15) upper surface.
8. sidelight type backlight module according to claim 1 or 2, it is characterised in that：
The light guide plate (11) is wedge shape；
Thickness from close to the point light source (12) side to far from the point light source (12) side, the light guide plate (11) gradually subtracts
It is small.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711465701.2A CN108279526A (en) | 2017-12-28 | 2017-12-28 | Sidelight type backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711465701.2A CN108279526A (en) | 2017-12-28 | 2017-12-28 | Sidelight type backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108279526A true CN108279526A (en) | 2018-07-13 |
Family
ID=62802654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711465701.2A Pending CN108279526A (en) | 2017-12-28 | 2017-12-28 | Sidelight type backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108279526A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115407561A (en) * | 2022-09-22 | 2022-11-29 | 上海天马微电子有限公司 | Light splitting film, backlight module and display device |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000147264A (en) * | 1998-11-05 | 2000-05-26 | Mitsubishi Chemicals Corp | Light control sheet and surface light source device using the same |
| KR20050109315A (en) * | 2004-05-13 | 2005-11-21 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device |
| KR20060035168A (en) * | 2004-10-21 | 2006-04-26 | 삼성전자주식회사 | Display apparatus |
| JP2008083230A (en) * | 2006-09-26 | 2008-04-10 | Citizen Electronics Co Ltd | Bending sheet |
| CN201289558Y (en) * | 2008-11-03 | 2009-08-12 | 光耀科技股份有限公司 | Optical film with diffusion and concentration function |
| CN102352982A (en) * | 2011-06-20 | 2012-02-15 | 友达光电股份有限公司 | Side light type backlight module |
| JP2012033368A (en) * | 2010-07-30 | 2012-02-16 | Stanley Electric Co Ltd | Light guide plate and plane lighting device using the same |
| JP2012221920A (en) * | 2011-04-14 | 2012-11-12 | Kuraray Co Ltd | Planar light source device and image display device |
| CN103797406A (en) * | 2011-09-20 | 2014-05-14 | 3M创新有限公司 | Backlight device |
| KR20170064377A (en) * | 2015-12-01 | 2017-06-09 | 엘지디스플레이 주식회사 | Backlight Unit and Liquid Crystal Display Device Having the Same |
| CN206247120U (en) * | 2016-10-19 | 2017-06-13 | 扬升照明股份有限公司 | Light source module |
| CN207895196U (en) * | 2017-12-28 | 2018-09-21 | 重庆市中光电显示技术有限公司 | Sidelight type backlight module |
-
2017
- 2017-12-28 CN CN201711465701.2A patent/CN108279526A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000147264A (en) * | 1998-11-05 | 2000-05-26 | Mitsubishi Chemicals Corp | Light control sheet and surface light source device using the same |
| KR20050109315A (en) * | 2004-05-13 | 2005-11-21 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device |
| KR20060035168A (en) * | 2004-10-21 | 2006-04-26 | 삼성전자주식회사 | Display apparatus |
| JP2008083230A (en) * | 2006-09-26 | 2008-04-10 | Citizen Electronics Co Ltd | Bending sheet |
| CN201289558Y (en) * | 2008-11-03 | 2009-08-12 | 光耀科技股份有限公司 | Optical film with diffusion and concentration function |
| JP2012033368A (en) * | 2010-07-30 | 2012-02-16 | Stanley Electric Co Ltd | Light guide plate and plane lighting device using the same |
| JP2012221920A (en) * | 2011-04-14 | 2012-11-12 | Kuraray Co Ltd | Planar light source device and image display device |
| CN102352982A (en) * | 2011-06-20 | 2012-02-15 | 友达光电股份有限公司 | Side light type backlight module |
| CN103797406A (en) * | 2011-09-20 | 2014-05-14 | 3M创新有限公司 | Backlight device |
| KR20170064377A (en) * | 2015-12-01 | 2017-06-09 | 엘지디스플레이 주식회사 | Backlight Unit and Liquid Crystal Display Device Having the Same |
| CN206247120U (en) * | 2016-10-19 | 2017-06-13 | 扬升照明股份有限公司 | Light source module |
| CN207895196U (en) * | 2017-12-28 | 2018-09-21 | 重庆市中光电显示技术有限公司 | Sidelight type backlight module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115407561A (en) * | 2022-09-22 | 2022-11-29 | 上海天马微电子有限公司 | Light splitting film, backlight module and display device |
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