CN106773298A - Backlight module and liquid crystal display - Google Patents
Backlight module and liquid crystal display Download PDFInfo
- Publication number
- CN106773298A CN106773298A CN201611217719.6A CN201611217719A CN106773298A CN 106773298 A CN106773298 A CN 106773298A CN 201611217719 A CN201611217719 A CN 201611217719A CN 106773298 A CN106773298 A CN 106773298A
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- China
- Prior art keywords
- layer
- liquid crystal
- light
- backlight module
- guide plate
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- 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
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- 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
Abstract
The present invention provides a kind of backlight module and the liquid crystal display comprising the backlight module.By using liquid crystal cell array base palte of the prior art as the light guide plate, being further thinned the liquid crystal display and lowering production cost.Further, first refractive layer and the second refracting layer are once deposited on light guide plate, and the refractive index of the first refractive layer is more than the light guide plate and second refracting layer, so that light is totally reflected on second refracting layer with first refractive layer binding face, realize preferably total reflection effect, reduce the generation of light leakage phenomena, it is ensured that the light-emitting uniformity of each position in the liquid crystal display.Also, low refractive index film of the prior art is replaced by first refractive layer and second refracting layer, the cost of manufacture of the backlight module is saved.
Description
Technical field
The present invention relates to the manufacture field of liquid crystal display, more particularly to a kind of backlight module and liquid crystal display.
Background technology
At present, liquid crystal display has obtained substantial amounts of application in flat display field.Wherein, liquid crystal display panel must be by
Backlight module is come the area source needed for providing.In the prior art, the design of the backlight module is usually and increases above light guide plate
Plus one layer of low refractive index film so that the light for coming is penetrated from side light source to be carried out entirely on low refractive index film and the light guide plate binding face
Reflection, so that light can at a distance be transmitted in light guide plate.But, it is sufficiently low (low that refractive index is hardly resulted at present
In refractive index film 1.4) so that light leakage phenomena easily occurs when light is transmitted in light guide plate, so that light is being led
Gradually off-energy when being transmitted in tabula rasa, reduces the utilization rate of light.
The content of the invention
The present invention provides a kind of backlight module and liquid crystal display, it is possible to increase the light utilization efficiency of backlight module.
The backlight module includes light source, light guide plate, first refractive layer, the second refracting layer, polarizing layer and reflecting plate, described
Light guide plate, first refractive layer, the second refracting layer and polarizing layer are stacked gradually on the reflecting plate, on the light guide plate with it is described
The exiting surface that first refractive layer fits is provided with site, and the light source is located at the incident side of the light guide plate, the first refractive
The refractive index of layer is more than the refractive index of the light guide plate and the refractive index of second refracting layer.
Wherein, adhered by glue-line between the light guide plate and the reflecting plate.
Wherein, the refractive index of the refractive index of the glue-line light guide plate is low.
Wherein, the material of the first refractive layer is SiN materials.
Wherein, the material of second refracting layer is SiO2Material.
Wherein, the polarizing layer is polaroid or metal grating.
Wherein, the light source is LED.
The liquid crystal display, including above-mentioned backlight module, the liquid crystal display also include array base palte, color film base
Plate and the liquid crystal layer between the array base palte and the color membrane substrates.
Wherein, the array base palte includes TFT switch and pixel electrode, and the TFT switch and pixel electrode are formed at institute
State on polarizing layer.
Wherein, the liquid crystal display also include polaroid, the layer of polarizer be laminated on the color membrane substrates with it is described
The relative side of liquid crystal layer.The backlight module of the invention is more than the leaded light by depositing refractive index on the light guide plate
The first refractive layer of plate, and refractive index is deposited with first refractive layer less than described the second of first refractive layer
Refracting layer so that light is totally reflected on second refracting layer with first refractive layer binding face, is realized preferable
Total reflection effect, reduces the generation of light leakage phenomena, improves the utilization rate of light, and ensures the light extraction of each position in liquid crystal display
Uniformity.Also, low refractive index film of the prior art is replaced by first refractive layer and second refracting layer, is saved
The cost of manufacture of the backlight module.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the LCD display panel structure schematic diagram of better embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, the present invention provides a kind of backlight module 100 and the liquid crystal display comprising the backlight module 100.
The liquid crystal display includes array base palte, color membrane substrates 110, polaroid 120 and positioned at the array base palte and the color film
Liquid crystal layer 130 between substrate 110.The polaroid 120 is laminated on the color membrane substrates 110.The polaroid 120 is laminated
In side relative with the liquid crystal layer 130 on the color membrane substrates 110.
The array base palte includes that backlight module 100 and TFT switch (not shown) and pixel electrode (do not show in figure
Go out).The backlight module 100 includes light source 10, the 30, second refracting layer 40 of light guide plate 20, first refractive layer, polarizing layer 50 and anti-
Penetrate plate 60.The light guide plate 20 is laminated on the reflecting plate 60.The first refractive layer 30 is laminated on the light guide plate 20.
Second refracting layer 40 is laminated on the first refractive layer 30, and the polarizing layer 50 is laminated in second refracting layer 40
On.
The light source 10 is that the backlight module 100 provides light source.The light source 10 enters light located at the light guide plate 20
Side.The incident side of described light guide plate 20 can be the light guide plate 20 side (light-metering formula) or the light guide plate 20 is just
Lower section (straight-down negative).Wherein, the arrangement of the side-light type of the light source 10 can be caused described compared to the mode of straight-down negative
Liquid crystal display is thinner, therefore application is relatively broad.And the species of the light source 10 can be LED, cold-cathode fluorescence lamp
(CCFL) or electroluminescent light source (EL) etc. has brightness high, long lifespan, it is luminous uniform the features such as light source.In the present embodiment,
The arrangement of the light source 10 is side-light type, using LED as the light source 10.
The light guide plate 20, first refractive the 30, second refracting layer 40 of layer and reflecting plate 60 act as the light source 10
The light for sending be converted to area source so that the backlight module 100 of stating carries out uniform light extraction, meets the liquid crystal display
Brightness requirement.
Wherein, the exiting surface for being fitted with first refractive layer 30 on the light guide plate 20 is provided with site 21.The net
Point 21 is the groove or projection of multiple array arrangements, and its light for acting as to be radiated on the site 21 carries out unrestrained anti-
Penetrate, light is dispersed in all angles, so that some light appears the backlight module 100 carries out light extraction, it is every by control
The density of site 21 described in individual position can just control the backlight module 100 in the number of the light guide of this position.This
In embodiment, with the base substrate of the array base palte of liquid crystal cell described in the substitution prior art of the light guide plate 20, even if
The TFT switch and the pixel electrode in the array base palte are formed on the polarizing layer 50, by the liquid crystal cell with
The backlight module 100 is unified into an entirety, further reduces the thickness of the liquid crystal display.
Wherein, the first refractive layer 30 is the thicker film layer with high index of refraction.First refractive layer 30 it is big
In the refractive index of the light guide plate 20 so that the light that the light source 10 is provided can be refracted into described by the light guide plate 20
In first refractive layer 30, and light in first refractive layer 30 can be in first refractive layer 30 and light guide plate
It is totally reflected on 20 interfaces for fitting, so that light is transmitted in first refractive layer 30.First folding
The thickness for penetrating the more common film layer of thickness of layer 30 is thicker, so that light preferable onwards transmission in the polarizing layer 30.Can manage
Solution, the thickness and material of the first refractive layer 30 can be adjusted according to actual needs.It is described in the present embodiment
The material of first refractive layer 30 is SiN materials (refractive index is about 1.75).
Wherein, second refracting layer 40 is the high transparency material with normal refraction rate.Second refracting layer 40
Refractive index is less than first refractive layer 30 so that the light of the certain angle of transmission is described in first refractive layer 30
It is totally reflected on the exiting surface fitted with first refractive layer 30 on second refracting layer 40 so that the light of total reflection enters
The onwards transmission of one step, it is ensured that the generation of light leakage phenomena will not occur, so as to ensure the light extraction of each position of the backlight module 100
Uniformly.The thickness and material of second refracting layer 40 can be adjusted according to actual needs.In the present embodiment, described
The material that is made of two refracting layers 40 is SiO2Material.
The polarizing layer 50 is located between the liquid crystal layer 130 and second refracting layer 30, will be from the described second refraction
The light that layer 40 is projected selects certain angle to be transmitted into the liquid crystal layer 130 is interior, so that the liquid crystal 130 can be more
The polarization direction of the good transformation light.In the present embodiment, the polarizing layer 50 is the polarizer with certain angle.Can be with
Understand, the polarizing layer 50 can also be the metal grating for being capable of achieving to carry out light polarisation filtration, or, when the liquid crystal
130 be polarized light type liquid crystal (PDLC) when, the polarizing layer 50 can remove.
The reflecting plate 60 is used to be totally reflected the light shone in from the light guide plate 20, so as to prevent light
Leakage, be further ensured that the uniform light extraction everywhere of the backlight module 100.The reflecting plate 60 by glue-line 61 paste with it is described
With the first refractive 30 relative one side of layer on light guide plate 20.In the present embodiment, the glue-line 61 is low-refraction glue-line, i.e.,
The refractive index of the refractive index light guide plate 20 of the glue-line 61 is low, so as to ensure that the reflecting plate 60 has to incident ray
Preferably total reflection effect, further improves the utilization rate of light, it is ensured that the uniform light extraction everywhere of backlight module 100.
In the present invention, the action principle of the backlight assembly 100 is as shown in light propagation circuit II in Fig. 1.The light source
10 light irradiations for sending enter in the light guide plate 20, are shining on the light guide plate 20 and the light on the binding face of the reflecting plate 60
It is totally reflected on the binding face, and due to the refraction of the refractive index less than first refractive layer 30 of the light guide plate 20
Rate, the light that total reflection is gone back enters first refractive layer 30, and has because the refractive index of first refractive layer 30 is big
In the refractive index of second refracting layer 40, the certain angle light into first refractive layer 30 is in first refractive layer
30 with the binding face of second refracting layer 40 on be totally reflected, the illumination of this total reflection be incident upon on the light guide plate 20 with
On the exiting surface of the first refractive layer 30 laminating.Also, because the light guide plate 20 is provided with described in the position of the exiting surface
Site 21, the light of total reflection is broken up, and the light for being dispersed into all directions is reflected, other in addition to light is totally reflected
The light in direction overflows the first refractive layer 30 and enters second folding with the exiting surface that second refracting layer 40 fits
Layer 40 is penetrated, it is to be pasted with second refracting layer 40 on first refractive layer 30 to occur to be totally reflected the light of other specific directions
It is totally reflected on the exiting surface of conjunction, and is transmitted according to light transmission means as previously described and carries out light extraction.It is shining into described
Enter first refractive layer 30 as previously described with the light on the first refractive 30 binding face of layer on light guide plate 20, and described
It is totally reflected on first refractive layer 30 and the binding face of second refracting layer 40, and breaks up described complete by the site 21
Reflection light so that the light portion overflows the first refractive layer 30, so as to the light for realizing the backlight module 100 exists
Uniform light extraction is carried out on whole exiting surface.Also, by controlling size, position and the density of the site 21, institute can be controlled
The number of the amount of light everywhere of backlight module 100 is stated, so as to control the emitting brightness of the backlight module 100.
Further, from the first refractive layer 30 overflow light is into second refracting layer 40 and travels further into
First polarization layer 50, the light of all directions by first polarization layer 50 by spilling is filtered so that had
The light of specific direction, the light of the specific direction for obtaining be the liquid crystal display needed for backlight.Through described first
Polarization layer 50 enters the liquid crystal layer 130, and the light is changed into polarization direction by the liquid crystal layer 130.Next
Light contacts produce color to the color membrane substrates 110, finally incide on the polarizer 120.By the whole liquid crystal
The intensity of the emergent ray of the effect control diverse location of display, so as to produce image.
The backlight module 100 of the invention by using liquid crystal cell array base palte of the prior art basis element plate as
The light guide plate 20, reduces one piece of use of substrate in the liquid crystal display, is further thinned the liquid crystal display
Device simultaneously lowers production cost.Further, in the refractive index that deposited on light guide plate 20 more than described in the light guide plate 20
First refractive layer 30 is simultaneously deposited with second folding of the refractive index less than first refractive layer 30 on first refractive layer 30
Penetrate layer 40 so that light is totally reflected on second refracting layer 30 and the first refractive 20 binding face of layer, realize compared with
Good total reflection effect, reduces the generation of light leakage phenomena, it is ensured that the light-emitting uniformity of each position in the liquid crystal display.And
And, by first refractive layer 20 and second refracting layer 30 substitution low refractive index film of the prior art, further drop
The cost of manufacture of the low backlight module 100.
Above disclosed is only a kind of preferred embodiment of the invention, can not limit the power of the present invention with this certainly
Sharp scope, one of ordinary skill in the art will appreciate that realizing all or part of flow of above-described embodiment, and weighs according to the present invention
Profit requires made equivalent variations, still falls within the covered scope of invention.
Claims (10)
1. a kind of backlight module, it is characterised in that the backlight module includes light source, light guide plate, first refractive layer, the second refraction
Layer, polarizing layer and reflecting plate, the light guide plate, first refractive layer, the second refracting layer and polarizing layer are stacked gradually in the reflection
On plate, the exiting surface fitted with first refractive layer on the light guide plate is provided with site, and the light source is located at the leaded light
The incident side of plate, the refraction of the refractive index more than the refractive index and second refracting layer of the light guide plate of the first refractive layer
Rate.
2. a kind of backlight module as claimed in claim 1, it is characterised in that pass through between the light guide plate and the reflecting plate
Glue-line is adhered.
3. a kind of backlight module as claimed in claim 2, it is characterised in that the refractive index light guide plate of the glue-line
Refractive index is low.
4. a kind of backlight module as claimed in claim 1, it is characterised in that the material of the first refractive layer is SiN materials.
5. a kind of backlight module as claimed in claim 1, it is characterised in that the material of second refracting layer is SiO2Material.
6. a kind of backlight module as claimed in claim 1, it is characterised in that the polarizing layer is polaroid or metal grating.
7. a kind of backlight module as claimed in claim 1, it is characterised in that the light source is LED.
8. a kind of liquid crystal display, it is characterised in that including the backlight module as described in claim any one of 1-7, the liquid
Crystal display also includes array base palte, color membrane substrates and the liquid crystal layer between the array base palte and the color membrane substrates.
9. a kind of liquid crystal display as claimed in claim 8, it is characterised in that the array base palte includes TFT switch and picture
Plain electrode, the TFT switch and pixel electrode are formed on the polarizing layer.
10. a kind of liquid crystal display as claimed in claim 8, it is characterised in that the liquid crystal display also includes polaroid,
The layer of polarizer is laminated on side relative with the liquid crystal layer on the color membrane substrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217719.6A CN106773298A (en) | 2016-12-26 | 2016-12-26 | Backlight module and liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611217719.6A CN106773298A (en) | 2016-12-26 | 2016-12-26 | Backlight module and liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106773298A true CN106773298A (en) | 2017-05-31 |
Family
ID=58926009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611217719.6A Pending CN106773298A (en) | 2016-12-26 | 2016-12-26 | Backlight module and liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106773298A (en) |
Cited By (7)
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| CN107561774A (en) * | 2017-08-23 | 2018-01-09 | 深圳创维－Rgb电子有限公司 | Side entrance back module and display device |
| CN107591489A (en) * | 2017-07-17 | 2018-01-16 | 南京第壹有机光电有限公司 | A kind of electroluminescent side luminescent device |
| CN108398741A (en) * | 2018-02-02 | 2018-08-14 | 厦门立达信照明有限公司 | Composite light guiding device and a kind of production method of composite light guiding device |
| CN111308775A (en) * | 2020-04-02 | 2020-06-19 | 武汉华星光电技术有限公司 | Display substrate, display panel and display device |
| WO2021258451A1 (en) * | 2020-06-23 | 2021-12-30 | 武汉华星光电技术有限公司 | Display panel and display apparatus |
| CN114137763A (en) * | 2021-11-02 | 2022-03-04 | 深圳市高展光电有限公司 | Display screen assembly and display device |
| WO2022241687A1 (en) * | 2021-05-19 | 2022-11-24 | 京东方科技集团股份有限公司 | Backlight module, display device, and manufacturing method |
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| CN107591489A (en) * | 2017-07-17 | 2018-01-16 | 南京第壹有机光电有限公司 | A kind of electroluminescent side luminescent device |
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| WO2022241687A1 (en) * | 2021-05-19 | 2022-11-24 | 京东方科技集团股份有限公司 | Backlight module, display device, and manufacturing method |
| CN114137763A (en) * | 2021-11-02 | 2022-03-04 | 深圳市高展光电有限公司 | Display screen assembly and display device |
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