CN104317069A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN104317069A CN104317069A CN201410665918.8A CN201410665918A CN104317069A CN 104317069 A CN104317069 A CN 104317069A CN 201410665918 A CN201410665918 A CN 201410665918A CN 104317069 A CN104317069 A CN 104317069A
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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
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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
- G02F1/03—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0338—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 ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect structurally associated with a photoconductive layer or having photo-refractive properties
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight module and a display device. The backlight module comprises a plurality of light sources located in a plurality of scanning control regions, and the light sources in each scanning control region are turned on or off simultaneously. The backlight module further comprises optical material layers arranged on the light outgoing sides of the light sources, and the optical material layers have different refractive indexes when different control parameters are applied to the optical material layers, wherein the refractive indexes of the optical material layers corresponding to the scanning control regions where the corresponding light sources are turned on are higher than the refractive indexes of the optical material layers corresponding to the scanning control regions where the corresponding light sources are turned off. According to the backlight module, the optical material layers corresponding to the scanning control regions are arranged, so the optical material layers have the different refractive indexes when the different control parameters are applied to the optical material layers, partial light emitted by the scanning control regions where the corresponding light sources are turned on enters corresponding display regions and is prevented from entering display regions corresponding to the scanning control regions where the corresponding light sources are turned off.
Description
Technical field
The present invention relates to display technique field, refer in particular to a kind of backlight module and display device.
Background technology
In the stereo display mode (such as SG3D, Real D3D display technique) of time-sharing procedure, need to coordinate the scanning of backlight to realize the display of high-quality.Usual way is that backlight is divided into multiple scanning area, each scanning area is provided with multiple light source, light source in a scanning area has the identical opening and closing time, the display of the opening time matching panel of each scanning area light source, each scanning area is scanned one by one and is opened, and corresponding scanning area is turned off the light after display frame completes.
In traditional direct backlight source structure, as depicted in figs. 1 and 2, light source 1 one-tenth array distribution, diffuser plate 2 is arranged on the light direction of light source 1, installation combined with display panel 20.When carrying out 3D display, backlight module forms scanning area A, B, C, and each scanning area correspondence is provided with several light sources 1, and the scanning area state of the corresponding display panel arranged above it of the light source 1 of each scanning area opens or closes.
The backlight module of prior art said structure, when the light source 1 in the A of scanning area is closed, during the light source luminescent of other scanning areas B, C, now, due to the architectural characteristic of diffuser plate, light is dispersed from illumination scan region to region of turning off the light is large-area, forms crosstalk, has influence on the display quality of viewing area corresponding to scanning area.
Therefore, existing down straight aphototropism mode set, when 3D shows, effectively can not realize the control of crosstalk, thus affect 3D display quality.
Summary of the invention
The object of technical solution of the present invention is to provide a kind of backlight module and display device, reduces the degree of divergence of light to region of turning off the light in illumination scan region in the backlight module of prior art, thus reduces the generation of crosstalk.
The invention provides a kind of backlight module, described backlight module comprises multiple light source, and described light source is divided into multiple scan control district, and wherein described in each, the described light source in scan control district is opened simultaneously or closes, and wherein said backlight module also comprises:
Optical material layer, is arranged at the light emission side of described light source, and described optical material layer, when applying different controling parameters, has different refractivity;
Wherein the refractive index of the described optical material layer corresponding to described scan control district of light source unlatching is greater than the refractive index of the described optical material layer corresponding to described scan control district that light source is closed.
Preferably, backlight module described above, wherein said optical material layer has first refractive rate n when applying the first controling parameters, and have the second refractive index n1 when applying the second controling parameters, wherein the second refractive index n1 is greater than first refractive rate n.
Preferably, backlight module described above, described backlight module also comprises a driving chip, is connected with described optical material layer, for:
Described optical material layer corresponding to the described scan control district that light source is opened applies described second controling parameters,
Described optical material layer corresponding to the described scan control district that light source is closed applies described first controling parameters.
Preferably, backlight module described above, described first controling parameters is zero volts, and described second controling parameters is the voltage of non-zero volt.
Preferably, backlight module described above, described in each, scan control district correspondence arranges a described optical material layer.
Preferably, backlight module described above, described optical material layer is in the same plane.
Preferably, backlight module described above, described optical material layer comprises electrooptical material.
Preferably, backlight module described above, described electrooptical material is the Electrooptic crystal material comprising potassium dihydrogen phosphate, or is the polar polymer electrooptical material comprising polyimide or poly quinoline.
Preferably, backlight module described above, the thickness h of described optical material layer meets following formula:
Wherein, d is the width value in described scan control district, and θ is the critical angle that total reflection occurs at the adjacent interface of optical material layer having the second refractive index n1 and have a first refractive rate n, wherein
Preferably, backlight module described above, described backlight module also comprises diffuser plate, and described diffuser plate and described optical material layer be arranged in parallel, and is positioned at the side of described optical material layer near described light source.
The present invention also provides a kind of display device, comprises display panel, also comprises the backlight module as above described in any one.
Preferably, display device described above, states backlight module and also comprises driving chip, and described display device also comprises:
Main control chip, under 3D display state, exports backlight control signal and optics control signal;
Backlight control unit, opens luminescence or closedown for controlling the described light source in scan control district described in each according to the backlight control signal received simultaneously;
Described optics control signal applies different controling parameters for the driving chip controlled in described backlight module to described optical material layer.
Preferably, display device described above, also comprises: for driving the flexible PCB of described display panel, and the driving chip of described backlight module and described flexible PCB are arranged at the different sides of described display device.
At least one in specific embodiment of the invention technique scheme has following beneficial effect:
By arranging the optical material layer corresponding with scan control district, when making optical material layer apply different controling parameters, there is different refractivity, total reflection interface is formed like this at the optical material layer place that adjacent light source opens and closes, the part light that the described scan control district that light source is opened sends is incident towards corresponding viewing area, avoid the viewing area corresponding to described scan control district entering light source closedown, thus in minimizing backlight module the light in illumination scan region to the degree of divergence in region of turning off the light, reduce the generation of crosstalk, reach the effect improving 3D display quality.
Accompanying drawing explanation
Fig. 1 represents the structural representation of existing a kind of backlight module;
Fig. 2 represents the distribution schematic diagram of light source in existing a kind of backlight module;
Fig. 3 represents the structural representation of the display device adopting backlight module described in the embodiment of the present invention;
Fig. 4 represents the structural representation of the corresponding setting of light source in backlight module described in the embodiment of the present invention shown in optical material layer with Fig. 2;
Fig. 5 represents the perspective view of optical material layer in backlight module described in the embodiment of the present invention;
Fig. 6 represents backlight module described in the employing embodiment of the present invention, respectively when 2D and 3D state, and the view of optical material layer;
Fig. 7 represents the structural representation of the display device adopting backlight module described in the embodiment of the present invention;
Fig. 8 represents the width of optical material layer, the corresponding relation figure between thickness and the cirtical angle of total reflection.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Backlight module described in the specific embodiment of the invention, described backlight module comprises multiple light source, and described light source is divided into multiple scan control district, and wherein described in each, the described light source in scan control district is opened simultaneously or closes, and described backlight module also comprises:
Optical material layer, is arranged at the light emission side of described light source, and described optical material layer, when applying different controling parameters, has different refractivity; Wherein the refractive index of the described optical material layer corresponding to described scan control district of light source unlatching is greater than the refractive index of the described optical material layer corresponding to described scan control district that light source is closed.。
Backlight module described in the embodiment of the present invention, by arranging optical material layer, when display device carries out 3D display, apply different controling parameters, the refractive index of the optical material layer corresponding to scan control district that light source is opened is greater than the refractive index of the optical material layer corresponding to scan control district that light source is closed, the optical material layer place that adjacent light source opens and closes forms total reflection interface, the part light sent in the described scan control district that light source is opened is incident towards corresponding viewing area, thus the degree that the scan control district (region of turning off the light) that the some light that can reduce the scan control district (illumination scan region) that light source is opened is closed to light source disperses, to reduce the generation of crosstalk.
When 3D shows, the embodiment utilizing the described optical material layer of multiple setting to form total reflection interface is:
Described optical material layer is in the same plane, described in each, scan control district correspondence arranges a described optical material layer, in addition, described optical material layer has first refractive rate n when applying the first controling parameters particularly, have the second refractive index n1 when applying the second controling parameters, wherein the second refractive index n1 is greater than first refractive rate n.
Described backlight module also comprises a driving chip, is connected with described optical material layer, for:
Described optical material layer corresponding to the described scan control district that light source is opened applies described second controling parameters,
Described optical material layer corresponding to the described scan control district that light source is closed applies described first controling parameters.
It will be understood by those skilled in the art that and determine rate according to Si Nieer snell, when the light transmitted in refractive index n1 material, incide with refractive index when being the interface of adjacent material of n, if when incident angle is greater than the critical angle θ of total reflection, can be totally reflected, wherein
Utilize driving chip and the optical material layer of above-mentioned functions, when adjacent two described optical material layers apply the first controling parameters and the second controling parameters respectively, the adjacent interfaces of two described optical material layers is formed as described total reflection interface; Be incident to the light of the described optical material layer with first refractive rate through the described optical material layer with the second refractive index, when incident angle is greater than the critical angle of total reflection, the adjacent interfaces of two described optical material layers be totally reflected.
Therefore, utilize above-mentioned mode, under 3D display state, the optical material layer corresponding to scan control district opened for needing light source, applies the second controling parameters, makes corresponding optical material layer have the second refractive index n1; The optical material layer corresponding to scan control district of closing for needing light source, applies the first controling parameters, makes corresponding optical material layer have first refractive rate n; Because the second refractive index n1 is greater than first refractive rate n, when light source open described scan control district send light be incident to adjacent two there is the adjacent interfaces of the optical material layer of first refractive rate and the second refractive index respectively time, if when incident angle is greater than the critical angle of total reflection, total reflection can be formed, make some light incident towards viewing area corresponding to the scan control district that light source is opened, thus the degree that the some light reaching the scan control district reducing light source unlatching is dispersed to the scan control district that light source is closed, to reduce the impact that crosstalk produces.
Particularly, described optical material layer is made up of electrooptical material, and described electrooptical material is the Electrooptic crystal material comprising potassium dihydrogen phosphate, or is the polar polymer electrooptical material comprising polyimide or poly quinoline.
Below in conjunction with Fig. 3 to Fig. 6, the structure of backlight module of the present invention is described in detail.
According to Fig. 3, the described backlight module of the embodiment of the present invention is formed as down straight aphototropism mode set structure, comprise: the diffuser plate 2 in the multiple light sources 1 becoming array distribution and the light emission side direction being arranged at light source 1, wherein light source 1, diffuser plate 2 and display panel 20 combine, be arranged on the inside of frame 4, be configured to a 2D/3D display device.Light source 1 is arranged in array setting, as shown in Figure 2, is formed as multiple scan control district, when 3D shows, is positioned at the described light source 1 in each scan control district for opening luminous or close simultaneously.
In addition, show module described in the embodiment of the present invention and also comprise optical material layer 5, be arranged at the light emission side of light source 1, in the embodiment of the present invention, each scan control district correspondence of light source 1 arranges an optical material layer 5, and described in each, optical material layer 5 is in the same plane, parallels setting with diffuser plate 2, diffuser plate 2 is positioned at the side of optical material layer 5 near light source 1, and the light utilizing diffuser plate 2 that light source 1 is sent is dispersed towards all angles.
The backlight module of the present embodiment comprises scanning area A, B, C, is certainly not limited to Tu Zhongsange scan control district, can also be more than three.Be preferably more than eight.Scan control district is extended along a direction, can be laterally or longitudinally to arrange, and each scan control district correspondence is provided with at least one light source 1.The quantity in scan control district is relevant to the response speed of the driving frequency of display panel and liquid crystal, and current time-sharing procedure 3D is shown as 120Hz and drives, the quantity in scan control district be 8 or more than.When 3D shows, backlight scan control district coordinates the signal of Display panel to open and close.When panel is 120Hz driving, 8 scan control districts of backlight will open and close the scanning of one-period successively at the one-period of 8.33ms.
In state shown in Fig. 3, at current time, the light source 1 in scan control district A, C is closed, and the light source 1 in scanning area control B is opened.
Adopt described in the embodiment of the present invention and show module, the optical material layer 5 corresponding with the number of partitions in scan control district is set, and scan control district and optical material layer 5 are arranged for one_to_one corresponding.As shown in Figure 2, if the scan control district of light source 1 be formed as A, B ..., G, H eight regions, then as shown in Figure 4, optical material layer 5 comprise corresponding a, b ..., g, h eight, in structure shown in Fig. 3, be positioned at one to one respectively immediately below diffuser plate 2.
In addition, in the embodiment of the present invention, described optical material layer 5 is made up of electrooptical material, it will be understood by those skilled in the art that electrooptical material is the optical functional materials with electrooptical effect, and under the effect of extra electric field, the refractive index of material can change.Based on this principle, the embodiment of the present invention, by the optical material layer 5 of electrooptical material, can, by controlling the voltage swing on optical material layer 5, make refractive index change, and forms total reflection interface.
In addition, the optical material layer 5 that the embodiment of the present invention is made up of electrooptical material, can be applied in the display device simultaneously realizing 2D and 3D display, when 2D shows, make the optical material layer 5 of all subregions keep identical refractive index, do not affect the transmission direction of light, make light therethrough.
Therefore, adopt the backlight module described in the embodiment of the present invention, also comprise a driving chip 6, as shown in Figure 5, be arranged at the side of optical material layer 5, be connected with each optical material layer 5, for:
When 2D shows, apply the first controling parameters to all described optical material layers, also namely apply the first voltage, make the optical material layer 5 of all subregions have identical first refractive rate n;
When 3D shows, coordinate the viewing area state corresponding to described scan control district, the first controling parameters (the first voltage) or the second controling parameters (the second voltage) is applied to described optical material layer, optical material layer 5 corresponding to the described scan control district that light source is opened has first refractive rate n, the optical material layer 5 that the described scan control district of light source closedown is corresponding has the second refractive index n1, second refractive index n1 is greater than first refractive rate n, the adjacent interfaces of such two described optical material layers 5 is formed as described total reflection interface, as shown in Figure 6, the described scan control district that light source is opened send light and reflect towards corresponding viewing area, avoid the viewing area corresponding to described scan control district entering light source closedown.
The first above-mentioned voltage can be zero volt, and the second voltage can be the voltage of non-zero volt.Also, namely when 2D shows, all optical material layers 5 all do not apply voltage; When 3D shows, the optical material layer 5 corresponding to the described scan control district that light source is closed does not apply voltage, applies the voltage of non-zero volt, namely can reach above-mentioned control effects to the optical material layer 5 that the described scan control district that light source is opened is corresponding.
Preferably, described electrooptical material is the Electrooptic crystal material comprising potassium dihydrogen phosphate, or is the polar polymer electrooptical material comprising polyimide or poly quinoline, but those materials are only and illustrate, is not limited to only to comprise that these are several.
Best, in the embodiment of the present invention, according to Fig. 8, the thickness h of described optical material layer 5 meets following formula:
Wherein, d is the width value in described scan control district, and θ is the critical angle that the adjacent optical material layer generation having the second refractive index n1 and have first refractive rate n is totally reflected, wherein
It will be appreciated by those skilled in the art that, after the size of display device is determined, the width d in a scan control district of backlight module and display panel is a determined value, therefore d value is a definite value, and after two controling parameters of optical material layer 5 are determined, its first refractive rate n under two kinds of different controling parameters and the second refractive index n1 can be obtained, therefore determine the critical angle θ value that total reflection occurs.
According to more than, can calculate and obtain the one-tenth-value thickness 1/10 h of optical material layer, when
time, can enter at the light of refractive index to be n1 and refractive index be n interfacial refraction the scan control district that adjacent light source closes, and when one-tenth-value thickness 1/10 h is
scope in time, h is the bigger the better.
The present invention provides a kind of display device on the other hand, comprises display panel and above-mentioned backlight module, if Fig. 7 is the perspective view of display device of the present invention.
Wherein when display panel carries out 3D display, the refractive index of the described optical material layer corresponding to described scan control district that light source is opened is greater than the refractive index of the described optical material layer corresponding to described scan control district that light source is closed.
According to Fig. 7, display device described in the embodiment of the present invention, comprise the display module of said structure, wherein the light source 1 of structure and the backlight 10 of diffuser plate 2 formation are arranged at immediately below display panel 20 as shown in Figure 3, backlight 10 send light and launch towards display panel 20, optical material layer 5 is arranged between display panel 20 and backlight 10.
In addition, this display device also comprises:
Main control chip, under 3D display state, exports backlight control signal and optics control signal;
Backlight control unit, the described light source 1 for controlling scan control district described in each according to the backlight control signal received is opened luminous simultaneously or is closed;
Wherein said optics control signal applies different controling parameters for the driving chip 6 (flexible PCB) controlled in described backlight module to described optical material layer 5;
Display panel 20 is driven to show the driving chip 21 (flexible PCB) of image.The wherein picture signal that exports according to driving chip 21 of main control chip, export backlight control signal and optics control signal, drive optical material layer 5 and light source 1 to change state, under realizing 3D state, coordinate the signal scanning of display panel 20, promote 3D picture display effect.
Preferably, in order to avoid interference, driving chip 21 and driving chip 6 are positioned at different sides relative to display device, and display panel 20 and optical material layer 5 are fixed together by frame and backlight.
The present invention also provides a kind of control method of backlight module described above on the other hand, and described control method comprises:
The described optical material layer corresponding to described scan control district that light source is opened applies the second controling parameters, makes corresponding described optical material layer have the second refractive index n1;
The described optical material layer corresponding to described scan control district that light source is closed applies the first controling parameters, and make corresponding described optical material layer have first refractive rate n, wherein the second refractive index n1 is greater than first refractive rate n.
Particularly, when backlight module coordinates 2D display, apply the first controling parameters to described optical material layer, make optical material layer described in each all have first refractive rate;
When backlight module coordinates 3D display, coordinate the viewing area state corresponding to described scan control district, the first controling parameters or the second controling parameters is applied to described optical material layer, make when adjacent two described optical material layers apply the first controling parameters and the second controling parameters respectively, the adjacent interfaces of two described optical material layers is formed as described total reflection interface, the institute of described scan control district that light source is opened sends light towards the reflection of corresponding viewing area, avoids entering the viewing area corresponding to described scan control district of light source closedown.
The present invention also provides a kind of control method of as above display device on the other hand, and described control method comprises:
When 2D shows, apply the first controling parameters to described optical material layer, make optical material layer described in each all have first refractive rate n;
When 3D shows, apply the second controling parameters to the described optical material layer corresponding to the described scan control district that source is opened, make corresponding described optical material layer have the second refractive index n1; Apply the first controling parameters to the described optical material layer corresponding to the described scan control district that light source is closed, make corresponding described optical material layer have first refractive rate n, wherein the second refractive index n1 is greater than first refractive rate n.
Backlight module described in the embodiment of the present invention and display device, total reflection interface is formed by increasing one deck optical material layer relative to prior art, the part light that the described scan control district that light source is opened sends reflects towards corresponding viewing area, avoid the viewing area corresponding to described scan control district entering light source closedown, thus in minimizing backlight module the light in illumination scan region to the degree of divergence in region of turning off the light, reduce the generation of crosstalk, reach the effect improving 3D display quality.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (13)
1. a backlight module, described backlight module comprises multiple light source, and described light source is divided into multiple scan control district, and wherein described in each, the described light source in scan control district is opened simultaneously or closes, and it is characterized in that, described backlight module also comprises:
Optical material layer, is arranged at the light emission side of described light source, and described optical material layer, when applying different controling parameters, has different refractivity;
Wherein the refractive index of the described optical material layer corresponding to described scan control district of light source unlatching is greater than the refractive index of the described optical material layer corresponding to described scan control district that light source is closed.
2. backlight module as claimed in claim 1, it is characterized in that, described optical material layer has first refractive rate n when applying the first controling parameters, and have the second refractive index n1 when applying the second controling parameters, wherein the second refractive index n1 is greater than first refractive rate n.
3. backlight module as claimed in claim 2, it is characterized in that, described backlight module also comprises a driving chip, is connected with described optical material layer, for:
Described optical material layer corresponding to the described scan control district that light source is opened applies described second controling parameters,
Described optical material layer corresponding to the described scan control district that light source is closed applies described first controling parameters.
4. backlight module as claimed in claim 3, it is characterized in that, described first controling parameters is zero volts, and described second controling parameters is the voltage of non-zero volt.
5. backlight module as claimed in claim 1, it is characterized in that, described in each, scan control district correspondence arranges a described optical material layer.
6. backlight module as claimed in claim 1, it is characterized in that, described optical material layer is in the same plane.
7. backlight module as claimed in claim 1, it is characterized in that, described optical material layer comprises electrooptical material.
8. backlight module as claimed in claim 7, it is characterized in that, described electrooptical material is the Electrooptic crystal material comprising potassium dihydrogen phosphate, or is the polar polymer electrooptical material comprising polyimide or poly quinoline.
9. backlight module as claimed in claim 2, it is characterized in that, the thickness h of described optical material layer meets following formula:
Wherein, d is the width value in described scan control district, and θ is the critical angle that total reflection occurs at the adjacent interface of optical material layer having the second refractive index n1 and have a first refractive rate n, wherein
10. backlight module as claimed in claim 1, it is characterized in that, described backlight module also comprises diffuser plate, and described diffuser plate and described optical material layer be arranged in parallel, and is positioned at the side of described optical material layer near described light source.
11. 1 kinds of display device, comprise display panel, it is characterized in that, also comprise the backlight module as described in any one of claim 1 to 10.
12. display device as claimed in claim 11, it is characterized in that, described backlight module also comprises driving chip, and described display device also comprises:
Main control chip, under 3D display state, exports backlight control signal and optics control signal;
Backlight control unit, opens luminescence or closedown for controlling the described light source in scan control district described in each according to the backlight control signal received simultaneously;
Described optics control signal applies different controling parameters for the driving chip controlled in described backlight module to described optical material layer.
13. display device as claimed in claim 12, it is characterized in that, described display device also comprises: for driving the flexible PCB of described display panel,
The driving chip of described backlight module and described flexible PCB are arranged at the different sides of described display device.
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| CN201410665918.8A CN104317069A (en) | 2014-11-19 | 2014-11-19 | Backlight module and display device |
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Application publication date: 20150128 |