CN110161755A - A kind of backlight module and liquid crystal display device - Google Patents
A kind of backlight module and liquid crystal display device Download PDFInfo
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- CN110161755A CN110161755A CN201910502352.XA CN201910502352A CN110161755A CN 110161755 A CN110161755 A CN 110161755A CN 201910502352 A CN201910502352 A CN 201910502352A CN 110161755 A CN110161755 A CN 110161755A
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- light
- liquid crystal
- crystal display
- backlight module
- emitting surface
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Classifications
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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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- 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
-
- 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
- G02F1/133342—Constructional arrangements; Manufacturing methods for double-sided displays
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- 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 embodiment of the invention discloses a kind of backlight module and liquid crystal display devices.The backlight module includes: light guide plate, and light guide plate includes the first light-emitting surface and the second light-emitting surface being oppositely arranged；It is provided with the first lattice point structure on first light-emitting surface, the second lattice point structure is provided on the second light-emitting surface；First optical film and the second optical film, the first optical film are located at the side that the first light-emitting surface deviates from the second light-emitting surface；Second optical film is located at the side that the second light-emitting surface deviates from the first light-emitting surface；Light source, light source are located at at least one side of light guide plate, and the side of light guide plate is connect with the first light-emitting surface and the second light-emitting surface respectively.The embodiment of the present invention is by being arranged lattice point structure on two opposite light-emitting surfaces of light guide plate, realize the technology that two-sided light out only can be realized using a backlight module, reduce the quantity of light guide plate, eliminate reflector plate and iron back board structure, so that the LCD device structure of backlight module and the use backlight module is eased, frivolous, cost is lower.
Description
Technical field
The present invention relates to flat-panel screens field more particularly to a kind of backlight modules and liquid crystal display device.
Background technique
Liquid crystal display has the advantages that power consumption is low, small in size, radiation is low, with its application field further expansion,
Liquid crystal display with double-sided display function also starts to be applied and be accepted by consumer in certain fields.
Liquid crystal display is the display device of non-luminescent property, need can be only achieved the function of display by backlight.It is existing
Double-sided display technology be typically all that the mode that is affixed of the simple backlight module back side by two themselves one-sided displays reaches two-sided
The effect of display.In general, the backlight module of themselves one-sided displays includes a light guide plate, there is site in the floor design of light guide plate.
Light guide plate places reflector plate close to the side of site, and by iron back plate support and fixation, effect is will to reflect from site
Light be reflected back in light guide plate again, avoid the waste of light；And optical film is arranged in the side far from site, plays uniform light
Effect.
However, using the prior art, the technology that the backlight module of two themselves one-sided displays is affixed by iron backboard is obtained
Display with double faces internal structure in light guide plate, reflector plate and iron back version quantity be two, cause product whole
Thickness is thicker, and structure is complicated and less beautiful, higher cost.
Summary of the invention
The embodiment of the present invention provides a kind of backlight module and liquid crystal display device, to realize setting for ultrathin double-face display device
Meter reduces cost, improves packaging efficiency.
In a first aspect, the embodiment of the invention provides a kind of backlight modules, comprising:
Light guide plate, light guide plate include the first light-emitting surface and the second light-emitting surface being oppositely arranged；It is provided on first light-emitting surface
First lattice point structure is provided with the second lattice point structure on the second light-emitting surface；
First optical film and the second optical film, the first optical film are located at the side that the first light-emitting surface deviates from the second light-emitting surface；
Second optical film is located at the side that the second light-emitting surface deviates from the first light-emitting surface；
Light source, light source are located at at least one side of light guide plate, the side of light guide plate respectively with the first light-emitting surface and second
Light-emitting surface connection.
Second aspect, the embodiment of the invention provides a kind of liquid crystal display devices, comprising:
First liquid crystal display panel and the second liquid crystal display panel；
The backlight module that any embodiment of that present invention provides；
The first optical film that first liquid crystal display panel is located at backlight module deviates from the side of the second optical film；Second liquid crystal
The second optical film that display panel is located at backlight module deviates from the side of the first optical film.
Further, liquid crystal display device further includes structural frames, and structural frames are located at backlight module, the first LCD display
The side of plate and the second liquid crystal display panel；The edge of backlight module, the edge of the first liquid crystal display panel and second
The edge of liquid crystal display panel is respectively positioned in structural frames.
The embodiment of the present invention is by being arranged the first lattice point structure and the second site on two opposite light-emitting surfaces of light guide plate
Structure can be applied in double-side display device so that two light-emitting surfaces of light guide plate can uniformly go out light.Due to both reducing
The usage quantity of light guide plate in the backlight module of existing double-side display device, and reflector plate can not be used, and eliminate
It is used to support the iron backboard of reflector plate, so that the thickness of the backlight module is more frivolous, cost is lower.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for backlight module that the embodiment of the present invention one provides.
Fig. 2 is a kind of structural schematic diagram of liquid crystal display device provided by Embodiment 2 of the present invention.
Fig. 3 is a kind of structural schematic diagram for liquid crystal display device that the embodiment of the present invention three provides.
Fig. 4 is a kind of Structure explosion diagram for liquid crystal display device that the embodiment of the present invention three provides.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of structural schematic diagram for backlight module 10 that the embodiment of the present invention one provides.The embodiment of the present invention provides
A kind of backlight module 10, comprising:
Light guide plate 110, light guide plate 110 include the first light-emitting surface and the second light-emitting surface being oppositely arranged；On first light-emitting surface
It is provided with the first lattice point structure 121, the second lattice point structure 122 is provided on the second light-emitting surface；
First optical film 131 and the second optical film 132, the first optical film 131 are located at the first light-emitting surface and go out light away from second
The side in face；Second optical film 132 is located at the side that the second light-emitting surface deviates from the first light-emitting surface；
Light source 140, light source 140 are located at at least one side of light guide plate 110, and the side of light guide plate 110 goes out with first respectively
Smooth surface and the connection of the second light-emitting surface.
Specifically, in above-mentioned backlight module 10, one group of opposite for choosing light guide plate 110 is light-emitting surface, respectively the
One light-emitting surface and the second light-emitting surface.First lattice point structure 121 is set on the first light-emitting surface, and is arranged on the second light-emitting surface
Second lattice point structure 122 illustratively can be by the way of printing-type and non-printing formula, in the table of 110 light-emitting surface of light guide plate
Face, which is formed, has effigurate site, site the first lattice point structure 121 of composition on the first light-emitting surface, on the second light-emitting surface
Site constitutes the second lattice point structure 122, which can be tiny printing white point or subtle concaveconvex structure, have to light scattered
The effect of penetrating.Choose at least one on light guide plate 110 in remaining four sides connecting with the first light-emitting surface and the second light-emitting surface
A plane places light source 140 in the side of the plane, which can provide point light source or linear light source, and entering light mode is
Side entering type enters light, such as single-sided illumination, left and right sides enter light, upper and lower sides enter light and four sides while entering light.Illustratively it is in Fig. 1
Single-sided illumination.Deviate from the side of the second light-emitting surface in 110 first light-emitting surface of light guide plate, is provided with the first optical film 131, Yi Ji
110 second light-emitting surface of light guide plate deviates from the side of the first light-emitting surface, is provided with the second optical film 132, which plays
The effect of even light.First optical film 131 and the second optical film 132 for example may each comprise prism film and reflecting polarizer
Deng.
The working principle of the technical program: most of light issued by light source 140 can occur entirely in the inside of light guide plate 110
Reflection, and on the position that light guide plate 110 is printed on site, since total reflection condition is destroyed, the no longer regular total reflection of light,
But refraction and reflex can occur.By taking the first light-emitting surface as an example, when light reaches the first lattice point structure 121, a part
Light reflects light guide plate 110 from the first light-emitting surface, uniformly projects after the first optical film 131, and another part light can quilt
Reflection, thus light guide plate 110 is reflected from the second light-emitting surface, it is uniformly projected after the second optical film 132.Second light-emitting surface is same
Reason.
Above-mentioned backlight module 10 designs lattice point structure by one group of opposite in light guide plate 110, in lattice point structure pair
Under the scattering process of light, projected so that the light that light source issues is divided equally from two light-emitting surfaces of light guide plate, thus by point light source or line
Light source is converted into uniform area source.Moreover, in this course, not needing the light weight that will be reflected from site using reflector plate
It newly is reflected back light guide plate 110, can also guarantee the utilization rate of light.Due to not containing reflector plate in the backlight module 10 and being used for
The iron backboard of reflector plate is supported, and is only needed using a light guide plate, to enormously simplify the structure of backlight module 10, is reduced
Its thickness, cost of manufacture are also reduced therewith.
The embodiment of the present invention is by being arranged the first lattice point structure and the second site on two opposite light-emitting surfaces of light guide plate
Structure can be applied in double-side display device so that two light-emitting surfaces of light guide plate can uniformly go out light.Due to both reducing
The usage quantity of light guide plate in the backlight module of existing double-side display device, and reflector plate can not be used, and eliminate
It is used to support the iron backboard of reflector plate, so that the thickness of the backlight module is more frivolous, cost is lower.
On the basis of the above embodiments, optionally, the material of light guide plate 110 includes but is not limited to poly-methyl methacrylate
Ester (polymethyl methacrylate, PMMA), copolymer of methyl methacrylatestyrene (methyl
Methacrylate-styrene copolymer, MS), polystyrene plastics (Polystyrene, PS) or glass.
Optionally, the shape of site includes but is not limited to justify in the first lattice point structure 121 and the second lattice point structure 122
The size of shape, ellipse, rectangular and diamond shape, site can freely be adjusted according to practical light-out effect.
Optionally, light source 140 includes cathode fluorescent tube (Cold Cathode Fluorescent Lamp, CCFL)
Or light emitting diode (Light Emitting Diode, LED).
Wherein, CCFL can provide linear light source, and LED can provide point light source.
Preferably, at least two opposite sides of light guide plate 110 are provided with light source 140.
It is understood that light source 140 at least is arranged in two opposite sides, light luminance can be improved, and right
The light source of title is placed, it is ensured that the light projected from the light-emitting surface any position of light guide plate 110 is identical, to ensure that light
The uniformity of line.
Preferably, the first lattice point structure 121 is identical with the dot density of the second lattice point structure 122.
It is understood that the first lattice point structure 121 of design is identical with the dot density of the second lattice point structure 122, work as light
When line is propagated in light guide plate 110, it can be scattered at the first lattice point structure 121 and the second lattice point structure 122, if the first site
Structure 121 is identical with the dot density of the second lattice point structure 122, then its effect is equivalent to two light-emitting surfaces in light guide plate 110
It is upper to form identical pointolite array, so that the light projected from light-emitting surface is more uniform.
Embodiment two
Fig. 2 is a kind of structural schematic diagram of liquid crystal display device provided by Embodiment 2 of the present invention.As shown in Fig. 2, the liquid
Crystal device includes:
First liquid crystal display panel 151 and the second liquid crystal display panel 152；
Backlight module 10 provided by the above embodiment；
The first optical film 131 that first liquid crystal display panel 151 is located at backlight module 10 deviates from the one of the second optical film 132
Side；The second optical film 132 that second liquid crystal display panel 152 is located at backlight module 10 deviates from the side of the first optical film 131.
It is understood that the light projected from 110 first light-emitting surface of light guide plate is the first liquid by the first optical film 131
LCD panel 151 provides light, and the light projected from 110 second light-emitting surface of light guide plate is the second liquid by the second optical film 132
LCD panel 152 provides light, to realize the purpose of double-sided display.
Liquid crystal display device provided by Embodiment 2 of the present invention is realized by using the backlight module that embodiment one provides
Double-sided display technology only can be realized using one group of backlight module, traditional double-sided display is eliminated in the liquid crystal display device
Reflector plate and iron in device carry on the back version, so that structure is simpler, thickness is more frivolous, and cost is lower.
Embodiment three
Fig. 3 is a kind of cross section structure schematic diagram for liquid crystal display device that the embodiment of the present invention three provides, and Fig. 4 is the liquid crystal
The Structure explosion diagram of display device.
Illustratively, the light source 140 of backlight module 10 is respectively arranged at and leads in Fig. 3 and liquid crystal display device shown in Fig. 4
The side of the side of two opposition of tabula rasa 110 enters light for left and right sides, is denoted as first light source 141 and second light source 142.
As shown in figure 3, a kind of liquid crystal display device provided in this embodiment further includes on the basis of above-described embodiment two
Structural frames 20；
Structural frames 20 are located at backlight module 10, the first liquid crystal display panel 151 and the second liquid crystal display panel 152
Side；The edge at the edge of backlight module 10, the edge of the first liquid crystal display panel 151 and the second liquid crystal display panel 152
It is respectively positioned in structural frames 20；
First liquid crystal display panel 151, the second liquid crystal display panel 152 and backlight module 10 are passed through 20 groups of structural frames
Dress, to form double-sided liquid crystal display device, and backlight module 10 does not need individually to be assembled with other structures frame, so that liquid crystal display
Apparatus structure is simple, and thickness is frivolous, and cost is relatively low.
Along the section perpendicular to 151 place plane of the first liquid crystal display panel, structural frames 20 are U-shaped.
Specifically, the structural frames 20 are right close to two of the first liquid crystal display panel 151 and the second liquid crystal display panel 152
The intermediate position of facade is engraved structure, for exposing the exhausted of the first liquid crystal display panel 151 and the second liquid crystal display panel 152
Most of area, and remaining four plane is then located at the side of backlight module 10 in structural frames 20, thus, along perpendicular to the first liquid
The section angle of 151 place plane of LCD panel is observed, and the structural frames 20 are U-shaped.
Optionally, structural frames 20 include first structure frame 161 and the second structural frames 162；
First structure frame 161 includes the first minor structure frame and the second minor structure frame；First minor structure frame and the second minor structure
Frame connection；First minor structure frame is located at the side that the first liquid crystal display panel 151 deviates from the second liquid crystal display panel 152；Second
Minor structure frame is located at the side of backlight module 10, the first liquid crystal display panel 151 and the second liquid crystal display panel 152；Along vertical
Directly in the section of 151 place plane of the first liquid crystal display panel, first structure frame 161 is L-shaped；Second structural frames 162 are parallel to
Second liquid crystal display panel, 152 place plane, the second structural frames 162 are located at the second liquid crystal display panel 152 away from the first liquid crystal
The side of display panel 151.
Specifically, structural frames 20 are split into first structure frame 161 and the second structural frames 162 for the ease of encapsulation.Its
In, the angle along the section perpendicular to 151 place plane of the first liquid crystal display panel is observed, and the first structure frame 161 is L-shaped.
Second structural frames 162 are affixed with the second liquid crystal display panel 152, are parallel to 152 place plane of the second liquid crystal display panel.Cause
And by the assembling of first structure frame 161 and the second structural frames 162, the encapsulation of liquid crystal display device may be implemented.
The technical solution of the embodiment of the present invention is realized by designing the structural frames simply easily spliced for liquid crystal display device
The encapsulation of liquid crystal display device.The liquid crystal display device gone out by the Technical Design of the embodiment, product integral thickness
It can accomplish within 10mm, can be described as ultrathin products compared with existing double-sided display product thickness；The simplification of structure is simultaneously
It has been greatly reduced the design and manufacture cost of double-sided display technology, and has improved packaging efficiency.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (10)
1. a kind of backlight module characterized by comprising
Light guide plate, the light guide plate include the first light-emitting surface and the second light-emitting surface being oppositely arranged；It is set on first light-emitting surface
It is equipped with the first lattice point structure, is provided with the second lattice point structure on second light-emitting surface；
First optical film and the second optical film, first optical film are located at first light-emitting surface away from second light-emitting surface
Side；Second optical film is located at the side that second light-emitting surface deviates from first light-emitting surface；
Light source, the light source are located at at least one side of the light guide plate, and the side of the light guide plate goes out with described first respectively
Smooth surface and second light-emitting surface connection.
2. backlight module according to claim 1, which is characterized in that the material of the light guide plate includes polymethylacrylic acid
Methyl esters, copolymer of methyl methacrylatestyrene, polystyrene plastics or glass.
3. backlight module according to claim 1, which is characterized in that first lattice point structure and second site
The shape of site includes at least one of round, oval, rectangular and diamond shape in structure.
4. backlight module according to claim 1, which is characterized in that the light source includes cathode fluorescent tube or shines
Diode.
5. backlight module according to claim 1, which is characterized in that the opposite at least two sides setting of the light guide plate
There is the light source.
6. backlight module according to claim 1, which is characterized in that first lattice point structure and second site knot
The dot density of structure is identical.
7. a kind of liquid crystal display device characterized by comprising
First liquid crystal display panel and the second liquid crystal display panel；
Any backlight module of claim 1-6；
The first optical film that first liquid crystal display panel is located at the backlight module deviates from the side of the second optical film；It is described
The second optical film that second liquid crystal display panel is located at the backlight module deviates from the side of the first optical film.
8. liquid crystal display device according to claim 7, which is characterized in that further include structural frames, the structural frames are located at
The side of the backlight module, first liquid crystal display panel and second liquid crystal display panel；The backlight module
Edge, the edge of first liquid crystal display panel and the edge of second liquid crystal display panel be respectively positioned on the knot
In structure frame.
9. liquid crystal display device according to claim 8, which is characterized in that along perpendicular to first liquid crystal display panel
The section of place plane, the structural frames are U-shaped.
10. liquid crystal display device according to claim 8, which is characterized in that the structural frames include first structure frame and
Second structural frames；
The first structure frame includes the first minor structure frame and the second minor structure frame；The first minor structure frame and second son
Structural frames connection；The first minor structure frame is located at first liquid crystal display panel away from second liquid crystal display panel
Side；The second minor structure frame is located at the backlight module, first liquid crystal display panel and second liquid crystal
Show the side of panel；The section of plane, the first structure frame are L-shaped where perpendicular to first liquid crystal display panel；
Second structural frames are parallel to plane where second liquid crystal display panel, and second structural frames are located at second liquid
LCD panel deviates from the side of first liquid crystal display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502352.XA CN110161755A (en) | 2019-06-11 | 2019-06-11 | A kind of backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910502352.XA CN110161755A (en) | 2019-06-11 | 2019-06-11 | A kind of backlight module and liquid crystal display device |
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| CN110161755A true CN110161755A (en) | 2019-08-23 |
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| CN201910502352.XA Pending CN110161755A (en) | 2019-06-11 | 2019-06-11 | A kind of backlight module and liquid crystal display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110709741A (en) * | 2019-09-04 | 2020-01-17 | 京东方科技集团股份有限公司 | Light guide plate, display module and display device |
| WO2020220817A1 (en) * | 2019-04-30 | 2020-11-05 | 京东方科技集团股份有限公司 | Backlight module, display module, and display device |
| CN113777820A (en) * | 2021-08-11 | 2021-12-10 | 苏州桐劼汽车电子有限公司 | Integrated double-backlight display structure |
| CN114488606A (en) * | 2020-10-23 | 2022-05-13 | 合肥京东方显示技术有限公司 | Display device |
| CN114594543A (en) * | 2022-03-23 | 2022-06-07 | 厦门天马微电子有限公司 | Backlight module and display device |
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Application publication date: 20190823 |
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| RJ01 | Rejection of invention patent application after publication |