CN103605237A - Display device - Google Patents
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- CN103605237A CN103605237A CN201310597615.2A CN201310597615A CN103605237A CN 103605237 A CN103605237 A CN 103605237A CN 201310597615 A CN201310597615 A CN 201310597615A CN 103605237 A CN103605237 A CN 103605237A
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Abstract
The invention relates to the technical field of display, and discloses a display device. The display device comprises a backlight module and a display panel. A light oriented film is arranged on the light emergent side of the backlight module, a lower polarizer is arranged on the light incident side of the display panel, an upper polarizer is arranged on the light emergent side of the display panel, and a switchable diffusion sheet which can be switched between a transparent state and a diffusion state is arranged between the light oriented film and the lower polarizer. The light oriented film comprises an orientation layer which is provided with a plurality of first light resisting walls in parallel, a light-transmitting area is formed between any two adjacent first light resisting walls, and the lateral surface, facing to the corresponding light-transmitting area, of each first light resisting wall is a light resisting surface. The display device can be switched between narrow viewing angle display and wide viewing angle display according to actual requirements of users, and the requirements of the users on diversified display of the display device can be met.
Description
Technical field
The present invention relates to display technique field, particularly a kind of display device.
Background technology
In display technique field, when under different occasions, people show information to liquid crystal indicator, the requirement of visual angle width is different, as, confidentiality when people can utilize the liquid crystal indicator with narrow visual angle to realize liquid crystal indicator to show watches liquid crystal indicator to show the requirement of information and utilize the liquid crystal indicator with wide visual angle to meet many people multi-angle simultaneously.
Yet, in prior art, can not in same liquid crystal indicator, realize the switching between Yu Zhai visual angle, wide visual angle, can not meet user's demand that variation shows to liquid crystal indicator.
Summary of the invention
The invention provides a kind of display device, this display device can be changed according to user's actual demand between the demonstration of narrow visual angle and the demonstration of wide visual angle, can meet user's demand that variation shows to display device.
For achieving the above object, the invention provides following technical scheme:
A kind of display device, comprise backlight module and display panel, the bright dipping side of described backlight module is provided with light oriented film, the light inlet side of described display panel is provided with lower polaroid, bright dipping side is provided with upper polarizer, is provided with the changeable diffusion sheet that can switch between pellucidity and disperse state between described smooth oriented film and described lower polaroid; Wherein, described smooth oriented film comprises oriented layer, described oriented layer has a plurality of the first resistance light walls that be arranged in parallel, between two first resistance light walls of arbitrary neighborhood, has photic zone, and described in each, the first resistance light wall is resistance light face towards the side of its corresponding photic zone.
When light is injected photic zone from the light inlet side of light oriented film, inject in the light of each photic zone, the light that angle between the thickness direction of incident direction and light oriented film is greater than a particular value cannot pass through light oriented film under the resistance light face effect of two first resistance light walls corresponding to this photic zone, and angle between incident direction and the thickness direction of light oriented film be less than the light of this particular value can be by above-mentioned photic zone by light oriented film, and then derive backlight module; Therefore,, in above-mentioned backlight module, the angle penetrating between the light of backlight module and the exiting surface of light oriented film by light oriented film is larger.When changeable diffusion sheet is converted to pellucidity, the light that penetrates backlight module after light oriented film orientation is not subject to the impact of the changeable diffusion sheet of pellucidity, and the incident angle when injecting lower polaroid is less, and then display device can realize the demonstration of narrow visual angle; When changeable diffusion sheet is converted to disperse state, the light that penetrates backlight module after light oriented film orientation is again during the changeable diffusion sheet by disperse state, can be diffused the changeable diffusion sheet uniform distribution again of state, light after changeable diffusion sheet uniform distribution is injected after lower polaroid, and the wide visual angle of realizing display device shows.
Therefore, display device provided by the invention can be changed according to user's actual demand between the demonstration of narrow visual angle and the demonstration of wide visual angle, can meet user's demand that variation shows to display device.
Preferably, the diffusion layer of described changeable diffusion sheet is formal Polymer Dispersed Liquid Crystal PDLC layer, trans Polymer Dispersed Liquid Crystal PDLC layer, polymer network liquid crystal PNLC layer or bistable state cholesteric crystal layer.
Preferably, in order to improve, to have above-mentioned display device and carry out the narrow visual angle effect that peep-proof shows while showing, described oriented layer also comprises a plurality of the second resistance light walls that be arranged in parallel, and it is arranged in a crossed manner that described the second resistance light wall and described first hinders light wall.
Preferably, in order to reduce the thickness of light oriented film, described the first resistance light wall and described the second resistance light wall are with layer preparation.
Preferably, described in each, the resistance light face of the first resistance light wall is extinction face, or reflective surface.
Preferably, when the resistance light face of described the first resistance light wall is extinction face:
Described in each, the first resistance light wall is resistance light wall prepared by light absorbent; Or
Described in each, on the side of the first resistance light wall, be provided with the light-absorption layer of being prepared by light absorbent, to form described extinction face.
Preferably, described in each the xsect of the first resistance light wall be shaped as rectangle; Or
Described in each the xsect of the first resistance light wall be shaped as triangle or trapezoidal, and point to bright dipping side direction by the light inlet side of described smooth oriented film, the width of described the first resistance light wall increases gradually.
Preferably, when the resistance light face of described the first resistance light wall is reflective surface:
The resistance light wall of the first resistance light wall for being prepared by reflectorized material described in each; Or
Described in each, on the side of the first resistance light wall, be provided with the reflector layer of being prepared by reflectorized material, to form described reflective surface.
Preferably, described in each the xsect of the first resistance light wall be shaped as triangle or trapezoidal, and point to bright dipping side direction by the light inlet side of described smooth oriented film, the width of described the first resistance light wall increases gradually.
Preferably, described in each, the first resistance light wall is arranged along the transverse direction of described display panel.
Accompanying drawing explanation
A kind of structural representation when the display device that Fig. 1 provides for the embodiment of the present invention is carried out the demonstration of narrow visual angle;
A kind of structural representation when the display device that Fig. 2 provides for the embodiment of the present invention is carried out the demonstration of wide visual angle;
In the display device that Fig. 3 provides for the embodiment of the present invention, the resistance light face of first of light oriented film the resistance light wall is the principle schematic of corner dimension between the light that penetrates of the restriction backlight module of extinction face time oriented film and the exiting surface of light oriented film;
In the display device that Fig. 4 provides for the embodiment of the present invention, the resistance light face of first of light oriented film the resistance light wall is the principle schematic of corner dimension between the light that penetrates of the restriction backlight module of reflective surface time oriented film and the exiting surface of light oriented film;
The structural representation when xsect of first of light oriented film the resistance light wall is trapezoidal in the display device that Fig. 5 provides for the embodiment of the present invention;
In the display device that Fig. 6 provides for the embodiment of the present invention, changeable diffusion sheet is the view of formal PDLC layer while being pellucidity;
In the display device that Fig. 7 provides for the embodiment of the present invention, changeable diffusion sheet is the view of formal PDLC layer while being disperse state;
In the display device that Fig. 8 provides for the embodiment of the present invention, changeable diffusion sheet is the view of bistable state cholesteric crystal layer while having focal conic texture;
In the display device that Fig. 9 provides for the embodiment of the present invention, changeable diffusion sheet is the view of bistable state cholesteric crystal layer while having planar texture;
The arrangement architecture schematic diagram of the first resistance light wall in light oriented film in the display device that Figure 10 provides for the embodiment of the present invention;
Structural representation when light oriented film has the first resistance light wall and the second resistance light wall in the display device that Figure 11 provides for the embodiment of the present invention.
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, Fig. 2 and Fig. 3, wherein, a kind of structural representation when display device that Fig. 1 provides for the embodiment of the present invention is carried out the demonstration of narrow visual angle; A kind of structural representation when the display device that Fig. 2 provides for the embodiment of the present invention is carried out the demonstration of wide visual angle; In the display device that Fig. 3 provides for the embodiment of the present invention, the resistance light face of first of light oriented film the resistance light wall is the principle schematic of corner dimension between the light that penetrates of the restriction backlight module of extinction face time oriented film and the exiting surface of light oriented film.
As depicted in figs. 1 and 2, the display device that the embodiment of the present invention provides, comprise backlight module 1 and display panel 4, the bright dipping side of backlight module 1 is provided with light oriented film 11, the light inlet side of display panel 4 is provided with lower polaroid 3, bright dipping side is provided with upper polarizer 5, is provided with the changeable diffusion sheet 2 that can switch between pellucidity and disperse state between above-mentioned smooth oriented film 11 and lower polaroid 3; Wherein, as shown in Figure 3, light oriented film 11 comprises oriented layer 113, oriented layer 113 has a plurality of the first resistance light walls 1131 that be arranged in parallel, between two first resistance light walls 1131 of arbitrary neighborhood, have photic zone 1132, each first resistance light wall 1131 side towards its corresponding photic zone 1132 is resistance light face.
When light is injected photic zone 1132 from the light inlet side of light oriented film 11, inject in the light of each photic zone 1132, the light that angle between the thickness direction of incident direction and light oriented film 11 is greater than a particular value cannot pass through light oriented film 11 under the resistance light face effect of two first resistance light walls 1131 corresponding to this photic zone, and angle between incident direction and the thickness direction of light oriented film 11 be less than the light of this particular value can be by above-mentioned photic zone 1132 by light oriented film 11, and then derive backlight module 1; Therefore,, in above-mentioned backlight module 1, the angle penetrating between the light of backlight module 1 and the exiting surface of light oriented film 11 by light oriented film 11 is larger.As shown in Figure 1, when changeable diffusion sheet 2 is converted to pellucidity, the light that penetrates backlight module 1 after light oriented film 11 orientations is not subject to the impact of the changeable diffusion sheet 2 of pellucidity, incident angle when injecting lower polaroid 3 is less, please refer to Figure 10, by the first resistance light wall 1131 being arranged in parallel in light oriented film 11, display device can realize narrow visual angle and show in the direction of a shown in Figure 10; As shown in Figure 2, when changeable diffusion sheet 2 is converted to disperse state, the light that penetrates backlight module 1 after light oriented film 11 orientations is again during the changeable diffusion sheet 2 by disperse state, can be diffused changeable diffusion sheet 2 uniform distribution again of state, light after changeable diffusion sheet 2 uniform distributions is injected after lower polaroid 3, and the wide visual angle of realizing display device shows.
Therefore, display device provided by the invention can be changed according to user's actual demand between the demonstration of narrow visual angle and the demonstration of wide visual angle, can meet user's demand that variation shows to display device.
In the display device providing in above-mentioned embodiment, the display panel 4 of display device can be the display panel of plurality of display modes, as, above-mentioned display panel 4 can be the display panel of the wide visual angle of the display panel display mode of the display panel of IPS pattern or the display panel of FFS pattern or MVA pattern, so that changeable diffusion sheet 2 shows narrow visual angle while switching between two states and wide visual angle shows to have obvious conversion effect while changing; Certain above-mentioned display panel 4 can also be the display panel of other common display patterns such as display panel of TN pattern, when the display panel of common display pattern is changed between two states at changeable diffusion sheet 2, the display panel with common display pattern also has obvious visual angle change.
Certainly, in the display device providing in above-mentioned embodiment, the diffusion layer of changeable diffusion sheet 2 can have multiple choices, as, the diffusion layer of above-mentioned changeable diffusion sheet 2 is formal Polymer Dispersed Liquid Crystal PDLC layer, or be trans PDLC layer, or be polymer network liquid crystal PNLC layer, or be bistable state cholesteric crystal layer.
Wherein, formal PDLC layer is at the next scattering states of conventional state, and then makes changeable diffusion sheet 2 in disperse state, as shown in Figure 7; And the liquid crystal molecule of formal PDLC layer inside after applying electric field is regularly arranged, make changeable diffusion sheet 2 in pellucidity, as shown in Figure 6.
The variable condition of trans PDLC layer is contrary with formal PDLC layer, repeats no more here.
Bistable state cholesteric crystal layer has two states, focal conic texture state as shown in Figure 8, and the planar texture state shown in Fig. 9; Above-mentioned bistable state cholesteric crystal layer is when focal conic texture state, and liquid crystal molecule is arranged immediately, can make changeable diffusion sheet in disperse state; Above-mentioned bistable state cholesteric crystal layer is when planar texture state, and liquid crystal molecule is regularly arranged, can make changeable diffusion sheet in pellucidity.
Please refer to Fig. 3 and Fig. 4, in the display device that Fig. 3 provides for the embodiment of the present invention, the resistance light face of first of light oriented film the resistance light wall is the principle schematic of corner dimension between the light that penetrates of the restriction backlight module of extinction face time oriented film and the exiting surface of light oriented film; In the display device that Fig. 4 provides for the embodiment of the present invention, the resistance light face of first of light oriented film the resistance light wall is the principle schematic of corner dimension between the light that penetrates of the restriction backlight module of reflective surface time oriented film and the exiting surface of light oriented film.
In a kind of preferred implementation, the resistance light face of the resistance of first in above-mentioned smooth oriented film 11 light wall 1131 can be extinction face, can be also reflective surface.
When the resistance light face of the first resistance light wall is extinction face, can be accomplished in several ways, in a kind of preferred implementation, above-mentioned each first resistance light wall 1131 can be the resistance light wall of being prepared by light absorbent, like this, the resistance light face self-assembling formation extinction face of the first resistance light wall 1131; Or, in another kind of preferred implementation, on the side of above-mentioned each the first resistance light wall 1131, be provided with the light-absorption layer of being prepared by light absorbent, to form extinction face.
As shown in Figure 3, when the resistance light face of each the first resistance light wall 1131 is extinction face, the shape of the xsect of each the first resistance light wall 1131 can be rectangle; The first resistance light wall 1131 has certain thickness, inject in the light of a photic zone 1132, the light being radiated on arbitrary resistance light face all can be absorbed by resistance light face, and then can not pass through light oriented film 11, light 43 as shown in Figure 3, the light not being irradiated on resistance light face can pass through light oriented film 11, light 41 and light 42 as shown in Figure 3, the angle between the incident direction of light shown in Fig. 3 41 and light 42 and the thickness direction of light oriented film 11 is the ultimate value of light angle that can be by this photic zone 1132; Inject in the light of this photic zone 1132, when the angle between the incident direction of light and the thickness direction of light oriented film 11 is greater than above-mentioned ultimate value, this light just can be irradiated on the resistance light face of the first resistance light wall 1131 and be absorbed by resistance light face, and then can not pass through light oriented film 11; And when the angle between the incident direction of light and the thickness direction of light oriented film 11 is less than above-mentioned ultimate value, this light just may pass through photic zone 1132, and then penetrate backlight module 1 by light oriented film 11.
Therefore, the resistance light face of the first resistance light wall 1131 is that extinction face and changeable diffusion sheet 2 are when pellucidity, backlight module 1 has larger incident angle while injecting lower polaroid 3 after can making the light that penetrates by changeable diffusion sheet 2 by light oriented film 11, and then makes display device realize narrow visual angle to show.
Certainly, in order to improve the utilization factor of the light that light source in backlight module is produced, improve the utilization factor that in backlight module 1, light source emits beam, in a kind of preferred implementation, the shape of the xsect of each the first resistance light wall 1131 can be triangle or trapezoidal, as shown in Figure 5, the structural representation when xsect that Fig. 5 is the first resistance light wall in light oriented film in the backlight module providing in the embodiment of the present invention is trapezoidal, and the light inlet side by light oriented film 11 is pointed to bright dipping side direction, the width of the first resistance light wall 1131 increases gradually.
When the resistance light face of each the first resistance light wall 1131 is reflective surface, can obtain in several ways, in a kind of preferred implementation, the resistance light wall of each the first resistance light wall 1131 for being prepared by reflectorized material, like this, the resistance light face self-assembling formation reflective surface of each the first resistance light wall 1131; Or, in another kind of preferred implementation, on the side of each the first resistance light wall 1131, can be provided with the reflector layer of being prepared by reflectorized material, to form reflective surface.
As shown in Figure 4, when the resistance light face of each the first resistance light wall 1131 is reflective surface, the shape of the xsect of the first resistance light wall 1131 can be triangle or trapezoidal, and points to bright dipping side direction by the light inlet side of light oriented film, and the width of the first resistance light wall increases gradually.Inject in the light of a photic zone 1132, the light that angle between the thickness direction of incident direction and light oriented film 11 is greater than a particular value can be reflected back in backlight module 1 by two resistance light faces corresponding to this photic zone 1132, can not pass through light oriented film 11, as light 47; Angle between the thickness direction of incident direction and light oriented film 11 is greater than in the light of above-mentioned particular value, and a part of light is not irradiated on resistance light face and directly by light oriented film 11, penetrates backlight module 1, as light 46 and light 44; Another part light can penetrate backlight module by photic zone 1132 after the reflection of resistance light face, as light 45, and, due to the xsect of the first resistance light wall 1131 be shaped as triangle or trapezoidal, the light appearing after the resistance light face reflection of the first resistance light wall 1131 penetrates the ejaculation direction of light oriented film 11 and the angle between the thickness direction of light oriented film 11 is greater than the angle of injecting between light oriented film 11.
Therefore, the resistance light face of the first resistance light wall 1131 is that reflective surface and changeable diffusion sheet 2 are when pellucidity, backlight module 1 has larger incident angle in the time of also can making the light of ejaculation inject lower polaroid 3 by light oriented film 11, can make above-mentioned display device realize narrow visual angle and show.
Please refer to Figure 11, structural representation when light oriented film has the first resistance light wall and the second resistance light wall in the display device that Figure 11 provides for the embodiment of the present invention.
In a kind of preferred implementation, in order to improve the effect of the display device peep-proof demonstration with above-mentioned backlight module, in the light oriented film 11 that above-mentioned backlight module 1 bright dipping side arranges, oriented layer 113 also comprises that a plurality of the second resistance light wall 1133, the second resistance light walls 1133 and the first resistance light walls 1131 that be arranged in parallel are arranged in a crossed manner.The narrow visual angle that a plurality of the first resistance light walls 1131 can make display device realize in a direction shows, and the narrow visual angle that a plurality of the second resistance light walls 1133 can make display device realize in b direction shows, therefore, the setting of a plurality of the first resistance light walls 1131 and the second resistance light wall 1133 can improve the confidentiality of display device when realizing the demonstration of narrow visual angle.
In a kind of preferred implementation, in order to reduce the thickness of light oriented film 11, the first resistance light wall 1131 and the second resistance light wall 1133 are with layer preparation.
Certainly, resistance light face of each the second resistance light wall 1133 can be extinction face, can be also reflective surface, and its principle, as above-mentioned description when the first resistance light wall 1131 is extinction face or reflective surface, repeats no more here.
Certainly, please continue to refer to Fig. 3, in order to improve the stability of light oriented film 11 structures, light oriented film 11 also comprises first substrate 111 and second substrate 112, and oriented layer 113 is between first substrate 111 and second substrate 112.
In another kind of preferred implementation, in order further to improve the stability of light oriented film 11 structures, each photic zone 1132 has the knee wall of being prepared by transparent material.
Particularly, each the first resistance light wall 1132 in the light oriented film 11 that backlight module 1 bright dipping side arranges is arranged along the transverse direction of display panel 4.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the embodiment of the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (10)
1. a display device, it is characterized in that, comprise backlight module and display panel, the bright dipping side of described backlight module is provided with light oriented film, the light inlet side of described display panel is provided with lower polaroid, bright dipping side is provided with upper polarizer, is provided with the changeable diffusion sheet that can switch between pellucidity and disperse state between described smooth oriented film and described lower polaroid; Wherein, described smooth oriented film comprises oriented layer, described oriented layer has a plurality of the first resistance light walls that be arranged in parallel, between two first resistance light walls of arbitrary neighborhood, has photic zone, and described in each, the first resistance light wall is resistance light face towards the side of its corresponding photic zone.
2. display device according to claim 1, it is characterized in that, the diffusion layer of described changeable diffusion sheet is formal Polymer Dispersed Liquid Crystal PDLC layer, trans Polymer Dispersed Liquid Crystal PDLC layer, polymer network liquid crystal PNLC layer or bistable state cholesteric crystal layer.
3. display device according to claim 2, is characterized in that, described oriented layer also comprises a plurality of the second resistance light walls that be arranged in parallel, and described the second resistance light wall and described the first resistance light wall are arranged in a crossed manner.
4. display device according to claim 3, is characterized in that, described the first resistance light wall and described the second resistance light wall are with layer preparation.
5. display device according to claim 2, is characterized in that, described in each, the resistance light face of the first resistance light wall is extinction face, or reflective surface.
6. display device according to claim 5, is characterized in that, when the resistance light face of described the first resistance light wall is extinction face:
Described in each, the first resistance light wall is resistance light wall prepared by light absorbent; Or
Described in each, on the side of the first resistance light wall, be provided with the light-absorption layer of being prepared by light absorbent, to form described extinction face.
7. display device according to claim 6, is characterized in that, described in each, the xsect of the first resistance light wall is shaped as rectangle; Or
Described in each the xsect of the first resistance light wall be shaped as triangle or trapezoidal, and point to bright dipping side direction by the light inlet side of described smooth oriented film, the width of described the first resistance light wall increases gradually.
8. display device according to claim 5, is characterized in that, when the resistance light face of described the first resistance light wall is reflective surface:
The resistance light wall of the first resistance light wall for being prepared by reflectorized material described in each; Or
Described in each, on the side of the first resistance light wall, be provided with the reflector layer of being prepared by reflectorized material, to form described reflective surface.
9. display device according to claim 8, it is characterized in that, described in each the xsect of the first resistance light wall be shaped as triangle or trapezoidal, and point to bright dipping side direction by the light inlet side of described smooth oriented film, the width of described the first resistance light wall increases gradually.
10. according to the display device described in claim 1～9 any one, it is characterized in that, described in each, the first resistance light wall is arranged along the transverse direction of described display panel.
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