CN103941431A - Adjustable polarization device, method and display device of adjustable polarization device - Google Patents
Adjustable polarization device, method and display device of adjustable polarization device Download PDFInfo
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- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims description 4
- 229910001887 tin oxide Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
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- 229910019142 PO4 Inorganic materials 0.000 description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
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- 235000019796 monopotassium phosphate Nutrition 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910017251 AsO4 Inorganic materials 0.000 description 1
- CFOAUMXQOCBWNJ-UHFFFAOYSA-N [B].[Si] Chemical compound [B].[Si] CFOAUMXQOCBWNJ-UHFFFAOYSA-N 0.000 description 1
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 description 1
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 description 1
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- PJNZPQUBCPKICU-UHFFFAOYSA-N phosphoric acid;potassium Chemical compound [K].OP(O)(O)=O PJNZPQUBCPKICU-UHFFFAOYSA-N 0.000 description 1
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- GNSKLFRGEWLPPA-ZSJDYOACSA-M potassium;dideuterio phosphate Chemical compound [K+].[2H]OP([O-])(=O)O[2H] GNSKLFRGEWLPPA-ZSJDYOACSA-M 0.000 description 1
- GVPLVOGUVQAPNJ-UHFFFAOYSA-M potassium;hydron;trioxido(oxo)-$l^{5}-arsane Chemical compound [K+].O[As](O)([O-])=O GVPLVOGUVQAPNJ-UHFFFAOYSA-M 0.000 description 1
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Abstract
The embodiment of the invention provides an adjustable polarization device, a method and a display device of the adjustable polarization device, and relates to the technical field of display. By means of the special design of the polarization device, different voltage signals can be input into the polarization device, and the display device can be switched between a common mode and an anti-peeping mode. The adjustable polarization device comprises a first conductive layer, a first polarization layer arranged on the first conductive layer, a second polarization layer arranged on the first polarization layer and a second conductive layer arranged on the second polarization layer, wherein the first conductive layer and the second conductive layer are respectively connected with a power supply, and the first polarization layer is made of electro-optic crystals.
Description
Technical Field
The invention relates to the technical field of display, in particular to an adjustable polarization device, a method thereof and a display device.
Background
With the continuous progress of display technologies, users have further demands for functions of display devices, and attention is paid to a peep-proof display technology capable of preventing others from seeing display information. The anti-peeping display device can only see the display image for the person with the anti-peeping glasses, but can not see the display image for the person without the anti-peeping glasses, so that the aim of protecting personal information and commercial information is fulfilled.
The existing display device can only have single peep-proof display or common display (non-peep-proof display), but in different application scenes, switching between two modes is required, but the prior art does not have a good solution.
Disclosure of Invention
The embodiment of the invention provides an adjustable polarization device, a method thereof and a display device, wherein the switching between a common mode and an anti-peeping mode of the display device can be realized by specially designing the polarization device and inputting different voltage signals into the polarization device.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides an adjustable polarization device, which comprises: the first conductive layer, the first polarization layer arranged on the first conductive layer, the second polarization layer arranged on the first polarization layer, and the second conductive layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarization layer is electro-optic crystal.
The light incident surface of the first polarization layer is parallel to the light emergent surface of the second polarization layer, the light emergent surface of the first polarization layer is parallel to the light incident surface of the second polarization layer, a preset angle is formed between the light incident surface of the first polarization layer and the light emergent surface of the first polarization layer, the light incident surface of the second polarization layer and the light emergent surface of the second polarization layer form the preset angle, and the preset angle is larger than 0 degree and smaller than 90 degrees.
The light emergent surface of the first polarizing layer is parallel to the light incident surface of the second polarizing layer, and the light incident surface of the first polarizing layer and the light emergent surface of the first conductive layer are in a mutually meshed zigzag shape.
The light incident surface of the first polarization layer is parallel to the light emergent surface of the second polarization layer, and the light incident surface of the second polarization layer is in a sawtooth shape.
The first conducting layer is connected with the negative electrode of the power supply, and the second conducting layer is connected with the positive electrode of the power supply;
or,
the first conducting layer is connected with the positive pole of the power supply, and the second conducting layer is connected with the negative pole of the power supply.
The material of the second polarization layer is crystal or high molecular material.
The first conducting layer and the second conducting layer are made of Indium Tin Oxide (ITO) conducting glass, fluorine-doped tin oxide (FTO) conducting glass or graphene.
The embodiment of the invention provides an adjustable polarization method, which is applied to the adjustable polarization device, and the adjustable polarization device comprises: the first conductive layer, the first polarization layer arranged on the first conductive layer, the second polarization layer arranged on the first polarization layer, and the second conductive layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarizing layer is electro-optic crystal;
the method comprises the following steps:
when the adjustable polarization device works in a non-polarization state, the power supply does not apply a voltage signal;
when the adjustable polarization device works in a polarization state, the power supply applies a half-wave voltage signal;
the light passing through the adjustable polarization device is in a non-polarization state, and the light passing through the adjustable polarization device is in a preset polarization state.
The embodiment of the invention provides a display device, which comprises a first polaroid, an array substrate arranged on the first polaroid, a color film substrate arranged on the array substrate, a second polaroid arranged on the color film substrate, and liquid crystal filled between the array substrate and the color film substrate, wherein the second polaroid comprises at least one adjustable polarization device.
The first polarizer comprises at least one adjustable polarizing means as described in any of the above.
The adjustable polarization device comprises a first conducting layer, a first polarization layer, a second polarization layer and a second conducting layer, wherein the first polarization layer is arranged on the first conducting layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarization layer is electro-optic crystal. Based on the adjustable polarization device, the method and the display device provided by the embodiment of the invention, the switching between the common mode and the peep-proof mode of the display device can be realized by specially designing the polarization device and inputting different voltage signals into the polarization device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an adjustable polarization apparatus provided in an embodiment of the present invention;
fig. 2 is a first schematic structural diagram of an adjustable polarization apparatus according to an embodiment of the present invention;
fig. 3 is a first schematic diagram of optical transmission when no voltage is applied to the adjustable polarizer according to the embodiment of the present invention;
fig. 4 is a first schematic diagram of optical transmission when a half-wave voltage is applied to the adjustable polarization apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a second adjustable polarization apparatus according to an embodiment of the present invention;
fig. 6 is a second schematic diagram of optical transmission when no voltage is applied to the adjustable polarizer according to the embodiment of the present invention;
fig. 7 is a schematic diagram of optical transmission when a half-wave voltage is applied to the adjustable polarization apparatus according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a third adjustable polarization device according to an embodiment of the present invention;
fig. 9 is a third schematic diagram of optical transmission when no voltage is applied to the adjustable polarizer according to the embodiment of the present invention;
fig. 10 is a third schematic diagram of optical transmission when a half-wave voltage is applied to the adjustable polarization apparatus according to the embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a multilayer tunable polarizer device according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of optical transmission when no voltage is applied to the multi-layer tunable polarizer according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of optical transmission when a half-wave voltage is applied to the multilayer adjustable polarizer according to an embodiment of the present invention;
FIG. 14 is a schematic flow chart of a method for adjusting polarization according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.
The elements in the figure are: 10. a first conductive layer; 11. a first polarizing layer; 12. a second polarizing layer; 13. a second conductive layer; 100. a light-emitting surface of the first conductive layer; 110. a light incident surface of the first polarizing layer; 111. a light-emitting surface of the first polarizing layer; 120. a light incident surface of the second polarizing layer; 121. a light-emitting surface of the second polarizing layer; 20. a first polarizing plate; 21. an array substrate; 22. a liquid crystal; 23. a color film substrate; 24 a second polarizer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides an adjustable polarization device, which comprises: the first conductive layer, the first polarization layer arranged on the first conductive layer, the second polarization layer arranged on the first polarization layer, and the second conductive layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarization layer is electro-optic crystal.
The first conductive layer and the second conductive layer are respectively connected with a power supply, that is, the first conductive layer can be connected with a negative electrode of the power supply, and the second conductive layer can be connected with a positive electrode of the power supply; the first conductive layer may be connected to a positive electrode of the power supply, and the second conductive layer may be connected to a negative electrode of the power supply.
Furthermore, the light incident surface of the first polarization layer is parallel to the light emergent surface of the second polarization layer, the light emergent surface of the first polarization layer is parallel to the light incident surface of the second polarization layer, a preset angle is formed between the light incident surface of the first polarization layer and the light emergent surface of the first polarization layer, the light incident surface of the second polarization layer and the light emergent surface of the second polarization layer form the preset angle, and the preset angle is larger than 0 degree and smaller than 90 degrees.
The tunable polarization device provided by the embodiment of the invention is described below by taking an example in which the first conductive layer is connected to the negative electrode of the power supply, and the second conductive layer is connected to the positive electrode of the power supply.
An embodiment of the present invention provides an adjustable polarization apparatus, as shown in fig. 1, including: a first conductive layer 10, a first polarizing layer 11 disposed on the first conductive layer 10, a second polarizing layer 12 disposed on the first polarizing layer 11, and a second conductive layer 13 disposed on the second polarizing layer 12; the first conductive layer 10 is connected to the negative electrode of a power supply, and the second conductive layer 13 is connected to the positive electrode of the power supply.
Specifically, the material of the first polarizing layer is an electro-optic crystal, and the electro-optic crystal is a crystal material with an electro-optic effect. Under the action of an external electric field, the phenomenon that the refractive index of the crystal changes is called an electro-optic effect. Wherein the photoelectric crystal can be potassium dihydrogen phosphate KDP (KH)2PO4) Or ammonium dihydrogen phosphate ADP (NH)4H2PO4) Potassium dihydrogen arsenate KDA (KH)2AsO4) Or potassium dideuterium phosphate KD P (KD)2PO4) Any of the embodiments of the inventionThis is not particularly limited. The material of the second polarizing layer may be a common crystal, an electro-optic crystal, or a polymer material, which is not specifically limited in this embodiment of the present invention.
The first conductive layer and the second conductive layer may be made of ITO conductive glass, FTO conductive glass, graphene, or other materials, which is not limited in this embodiment.
The ITO (Indium tin oxide) conductive glass is manufactured by plating a layer of Indium tin oxide film on a soda-lime-based or silicon-boron-based substrate glass by various methods such as sputtering, evaporation and the like. FTO (short for fluorine-doped tin oxide, fluorine-doped tin oxide). The FTO glass can be used as a substitute for ITO conductive glass and is widely applied to liquid crystal display screens.
Further, as shown in fig. 2, the first polarization layer 11 includes a light incident surface 110 of the first polarization layer and a light exiting surface 111 of the first polarization layer, and the second polarization layer 12 includes a light incident surface 120 of the second polarization layer and a light exiting surface 121 of the second polarization layer.
As shown in fig. 2, the light incident surface 110 of the first polarization layer is parallel to the light emitting surface 121 of the second polarization layer, the light emitting surface 111 of the first polarization layer is parallel to the light incident surface 120 of the second polarization layer, a preset angle θ is formed between the light incident surface 110 of the first polarization layer and the light emitting surface 111 of the first polarization layer, the preset angle θ is formed between the light incident surface 120 of the second polarization layer and the light emitting surface 121 of the second polarization layer, and the preset angle θ is greater than 0 degree and smaller than 90 degrees. The preset angle is a total reflection angle of light incident to the second polarizing layer from the first polarizing layer.
As shown in fig. 3 and 4, the working states of the adjustable polarizing device at different voltages are shown, wherein black one-way arrows indicate light rays, the light rays are transmitted from the first conductive layer, pass through the first polarizing layer and the second polarizing layer and are transmitted from the second conductive layer, black dots on the black one-way arrows indicate that the polarization state of the light rays is vertical to the paper surface, and double-way arrows on the black one-way arrows indicate that the polarization state of the light rays is parallel to the paper surface.
Fig. 3 is a transmission condition of light when no voltage is applied to the power supply, when no voltage is applied, the refractive index of the electro-optic crystal does not change, and all light can be transmitted, that is, light in two polarization states can be transmitted, and the propagation direction of the light is indicated by a one-way arrow line in fig. 3.
It should be noted that the specific peep-proof glasses may be peep-proof glasses in the prior art, or glasses manufactured by using the polarization device provided in the embodiment of the present invention, which is not limited in this embodiment.
Fig. 4 shows the transmission of light when a half-wave voltage is applied to a power supply, wherein, when the light wave propagates in the electro-optical crystal, the difference between the optical paths of two vertically polarized components of the light wave is half wavelength (corresponding to a phase difference of 180 degrees), which is called the half-wave voltage. When a power supply applies half-wave voltage, the electro-optical crystal can generate a double refraction phenomenon, one beam of light is divided into two beams of polarized refracted light, ordinary light (o light) and extraordinary light (e light) in the electro-optical crystal, and the refractive indexes of the two vertical polarized component light of the light in the electro-optical crystal are different; the refractive index of the second polarization layer is the same as that of the polarization component with the smaller refractive index of the two perpendicular polarization components of the electro-optical crystal of the first polarization layer, and the refractive index of the other perpendicular polarization component is larger, so that the light of the perpendicular polarization component will be reflected at the interface of the first polarization layer and the second polarization layer, and is indicated by a dotted line with an arrow in fig. 4, so that the light with the larger refractive index cannot penetrate through, thereby functioning as a polarizer. At the moment, for an observer, the screen is in a normal display state, and the display picture can be seen without special peep-proof glasses. Therefore, the function of adjusting the polarization state of the polarization device can be realized by applying different voltages to the adjustable polarization device. The display device using the polarization device can realize the switching between the peep-proof mode and the common display mode.
It should be noted that the electro-optical effect adopted by the embodiment of the present invention is longitudinal electro-optical modulation, i.e. the direction of the applied voltage is parallel to the propagation direction of the light. When no voltage is applied to the crystal, light rays propagate along the optical axis, and no birefringence phenomenon exists; when voltage is applied, the phase difference of polarized light in the crystal is only related to the applied voltage and is not related to the geometric size of the used crystal.
Optionally, an embodiment of the present invention further provides an adjustable polarization apparatus, as shown in fig. 5, where the adjustable polarization apparatus includes: a first conductive layer 10, a first polarizing layer 11 disposed on the first conductive layer 10, a second polarizing layer 12 disposed on the first polarizing layer 11, and a second conductive layer 13 disposed on the second polarizing layer 12; the first conductive layer 10 is connected to the negative electrode of a power supply, and the second conductive layer 13 is connected to the positive electrode of the power supply.
Further, as shown in fig. 5, the light emitting surface 111 of the first polarization layer is parallel to the light entering surface 120 of the second polarization layer, and the light entering surface 110 of the first polarization layer and the light emitting surface 100 of the first conductive layer are in a zigzag shape engaged with each other.
Two working states of the adjustable polarizing device are shown in fig. 6 and 7, wherein black single-headed arrows indicate light rays, the light rays pass from the first conductive layer, pass through the first polarizing layer and the second polarizing layer and are transmitted from the second conductive layer, black dots on the black single-headed arrows indicate that the polarization state of the light rays is vertical to the paper surface, and double-headed arrows on the black single-headed arrows indicate that the polarization state of the light rays is parallel to the paper surface.
Fig. 6 is the transmission condition of light when the power is not applied with voltage, and when not applied with voltage, the refractive index of the electro-optic crystal does not change, and all light can be passed through, and the light is shown with the line of arrow in fig. 6 and is propagated, and the light gets into first polarization layer and takes place the refraction for light gets into second polarization layer from first polarization layer and is not vertical incidence, and to the observer this moment, can not see the image that the screen shows, and only the people who has specific peep-proof glasses can see the display image.
The specific peep-proof glasses may be peep-proof glasses in the prior art, or glasses manufactured by using the polarization device provided in the embodiment of the present invention, which is not limited in this embodiment.
FIG. 7 is a diagram showing the transmission of light when a half-wave voltage is applied to a power supply, wherein the electro-optic crystal generates birefringence when the half-wave voltage is applied to the power supply, and a light ray is divided into two polarized refracted light rays, an ordinary ray (o light) and an extraordinary ray (e light) in the electro-optic crystal, and the refractive indexes of the two vertically polarized light rays in the electro-optic crystal are different; the refractive index of the second polarization layer is the same as that of the one of the two perpendicular polarization components of the electro-optical crystal of the first polarization layer, which has the smaller refractive index, and the refractive index of the other perpendicular polarization component is larger, and the light of the perpendicular polarization component will be reflected at the interface between the first polarization layer and the second polarization layer, which is indicated by the dotted line with an arrow in fig. 7, so that the light with the larger refractive index cannot penetrate, thereby functioning as a polarizer. At the moment, for an observer, the screen is in a normal display state, and the display picture can be seen without special peep-proof glasses. Therefore, the function of adjusting the polarization state of the polarization device can be realized by applying different voltages to the adjustable polarization device. The display device using the polarization device can realize the switching between the peep-proof mode and the common display mode.
Optionally, an embodiment of the present invention further provides an adjustable polarization apparatus, as shown in fig. 8, where the adjustable polarization apparatus includes: a first conductive layer 10, a first polarizing layer 11 disposed on the first conductive layer 10, a second polarizing layer 12 disposed on the first polarizing layer 11, and a second conductive layer 13 disposed on the second polarizing layer 12; the first conductive layer 10 is connected to the negative electrode of a power supply, and the second conductive layer 13 is connected to the positive electrode of the power supply.
Further, as shown in fig. 8, the light incident surface 110 of the first polarization layer is parallel to the light emergent surface 121 of the second polarization layer, and the light incident surface 120 of the second polarization layer is saw-toothed.
Fig. 9 and 10 show two working states of the adjustable polarizer, fig. 9 shows the transmission of light when no voltage is applied to the power supply, the refractive index of the electro-optic crystal does not change when no voltage is applied, all light can pass through, and fig. 9 shows the propagation of light by the line with an arrow, at this time, the observer cannot see the image displayed on the screen, and only the person with the specific peep-proof glasses can see the displayed image.
The specific peep-proof glasses may be peep-proof glasses in the prior art, or glasses manufactured by using the polarization device provided in the embodiment of the present invention, which is not limited in this embodiment.
FIG. 10 is a diagram showing the transmission of light rays when a half-wave voltage is applied to a power supply, wherein the electro-optic crystal generates birefringence, and a light ray is divided into two bundles of polarized refracted light rays in the electro-optic crystal, and the refractive indexes of two perpendicular polarized light rays in the electro-optic crystal are different; the refractive index of the second polarization layer is the same as that of the one of the two perpendicular polarization components of the electro-optical crystal of the first polarization layer, which has the smaller refractive index, and the refractive index of the other perpendicular polarization component is larger, and the light of the perpendicular polarization component will be reflected at the interface between the first polarization layer and the second polarization layer, which is indicated by the dotted line with an arrow in fig. 10, so that the light with the larger refractive index cannot penetrate, thereby functioning as a polarizer. At the moment, for an observer, the screen is in a normal display state, and the display picture can be seen without special peep-proof glasses. Therefore, the function of adjusting the polarization state of the polarization device can be realized by applying different voltages to the adjustable polarization device. The display device using the polarization device can realize the switching between the peep-proof mode and the common display mode.
It should be noted that the adjustable polarization device provided in the embodiment of the present invention may have any one of the structures shown in fig. 1, fig. 5, or fig. 8, or may be an adjustable polarization device with a multilayer structure formed by stacking multiple layers of any one of the adjustable polarization devices, as shown in fig. 11, fig. 12, and fig. 13, where the adjustable polarization device with a multilayer structure may increase an effective optical path of light transmission, and reduce transmission of a polarization state in one direction, so as to improve a polarization effect of the polarization device.
The adjustable polarization device provided by the embodiment of the invention comprises a first conducting layer, a first polarization layer arranged on the first conducting layer, a second polarization layer arranged on the first polarization layer, and a second conducting layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarization layer is electro-optic crystal. Based on the adjustable polarization device provided by the embodiment of the invention, through the special design of the adjustable polarization device and the input of different voltage signals to the adjustable polarization device, the polarization device can selectively transmit light which is irradiated to the adjustable polarization device, thereby realizing the switching between the polarization state and the non-polarization state.
The method for adjusting polarization provided by the embodiment of the invention is applied to the polarization adjusting device, and the polarization adjusting device comprises: the first conductive layer, the first polarization layer arranged on the first conductive layer, the second polarization layer arranged on the first polarization layer, and the second conductive layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarizing layer is electro-optic crystal; as shown in fig. 14, the method includes:
s101, when the adjustable polarization device works in a non-polarization state, no voltage signal is added to the power supply, wherein the non-polarization state is that all light passing through the adjustable polarization device is transmitted.
Specifically, as shown in fig. 3, for the transmission condition of light when the power supply is not applied with voltage, when no voltage is applied, the refractive index of the electro-optical crystal does not change, and all light can be transmitted, that is, light in two polarization states can be transmitted, and the propagation direction of light is represented by a one-way arrow line in fig. 3.
S102, when the adjustable polarization device works in a polarization state, the power supply applies a half-wave voltage signal, wherein the polarization state is that light passing through the adjustable polarization device is transmitted in a preset polarization state.
Specifically, as shown in fig. 4, the transmission condition of light when a half-wave voltage is applied to the power supply is shown, wherein, when the light wave propagates in the electro-optical crystal, the voltage required to be applied when the optical path difference of two vertical polarization state components of the light wave is half wavelength (the corresponding phase difference is 180 degrees) is called as the half-wave voltage. When a power supply applies half-wave voltage, the electro-optical crystal can generate a double refraction phenomenon, one beam of light is divided into two beams of polarized refracted light, ordinary light (o light) and extraordinary light (e light) in the electro-optical crystal, and the refractive indexes of the two vertical polarized component light of the light in the electro-optical crystal are different; the refractive index of the second polarization layer is the same as that of the polarization component with the smaller refractive index of the two perpendicular polarization components of the electro-optical crystal of the first polarization layer, and the refractive index of the other perpendicular polarization component is larger, so that the light of the perpendicular polarization component will be reflected at the interface of the first polarization layer and the second polarization layer, and is indicated by a dotted line with an arrow in fig. 4, so that the light with the larger refractive index cannot penetrate through, thereby functioning as a polarizer. At the moment, for an observer, the screen is in a normal display state, and the display picture can be seen without special peep-proof glasses. Therefore, the function of adjusting the polarization state of the polarization device can be realized by applying different voltages to the adjustable polarization device. The display device using the polarization device can realize the switching between the peep-proof mode and the common display mode.
The adjustable polarization method provided by the embodiment of the invention is applied to an adjustable polarization device, and the adjustable polarization device comprises a first conducting layer, a first polarization layer arranged on the first conducting layer, a second polarization layer arranged on the first polarization layer, and a second conducting layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarizing layer is an electro-optic crystal, the method comprising: when the adjustable polarization device works in a non-polarization state, the power supply does not apply a voltage signal; when the adjustable polarization device works in a polarization state, the power supply applies a half-wave voltage signal; the light passing through the adjustable polarization device is in a non-polarization state, and the light passing through the adjustable polarization device is in a preset polarization state. Based on the adjustable polarization method provided by the embodiment of the invention, through the special design of the adjustable polarization device and the input of different voltage signals to the adjustable polarization device, the polarization device can selectively transmit light which is irradiated to the adjustable polarization device, thereby realizing the switching between the polarization state and the non-polarization state.
An embodiment of the present invention provides a display device, as shown in fig. 15, including a first polarizer 20, an array substrate 21 disposed on the first polarizer 20, a color filter substrate 22 disposed on the array substrate 21, a second polarizer 24 disposed on the color filter substrate 22, and a liquid crystal 23 filled between the array substrate 21 and the color filter substrate 22, where the second polarizer 24 includes at least one adjustable polarizer as described above.
Further, the first polarizer 20 comprises at least one adjustable polarizing means as described above.
It should be noted that the second polarizer of the display device may include one adjustable polarizer as described above, or may include a plurality of adjustable polarizers as described above, and the use of a plurality of adjustable polarizers can increase the effective optical path and reduce the transmission of polarization state in one direction, so that the polarizer has better effect. The first polarizer may adopt the adjustable polarizing device provided by the present invention, or may also adopt a polarizer in the prior art, which is not limited in this embodiment
The display device provided by the embodiment of the invention can be a liquid crystal display device, and the liquid crystal display device can be a product with a display function, such as a liquid crystal display, a liquid crystal television, a digital photo frame, a mobile phone, a tablet personal computer and the like, or other products without limitation.
Based on the display device provided by the embodiment of the invention, the switching between the common mode and the peep-proof mode of the display device can be realized by specially designing the polarization device and inputting different voltage signals into the polarization device.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. An adjustable polarizing apparatus, comprising: the first conductive layer, the first polarization layer arranged on the first conductive layer, the second polarization layer arranged on the first polarization layer, and the second conductive layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarization layer is electro-optic crystal.
2. The adjustable polarizer device of claim 1, wherein the light incident surface of the first polarizer layer is parallel to the light emergent surface of the second polarizer layer, the light emergent surface of the first polarizer layer is parallel to the light incident surface of the second polarizer layer, a predetermined angle is formed between the light incident surface of the first polarizer layer and the light emergent surface of the first polarizer layer, the predetermined angle is formed between the light incident surface of the second polarizer layer and the light emergent surface of the second polarizer layer, and the predetermined angle is greater than 0 degree and smaller than 90 degrees.
3. The adjustable polarizer device of claim 1, wherein the light emitting surface of the first polarizer layer is parallel to the light incident surface of the second polarizer layer, and the light incident surface of the first polarizer layer and the light emitting surface of the first conductive layer are in a zigzag shape engaged with each other.
4. The adjustable polarizer device of claim 1, wherein the light incident surface of the first polarizer layer is parallel to the light emergent surface of the second polarizer layer, and the light incident surface of the second polarizer layer is saw-toothed.
5. An adjustable polarizing arrangement according to any one of claims 2 to 3 wherein the first conducting layer is connected to the negative pole of the power supply and the second conducting layer is connected to the positive pole of the power supply;
or,
the first conducting layer is connected with the positive pole of the power supply, and the second conducting layer is connected with the negative pole of the power supply.
6. An adjustable polarization device according to claim 5, wherein the material of the second polarization layer is crystalline or polymer material.
7. The tunable polarizer device of claim 5, wherein the first conductive layer and the second conductive layer are made of ITO conductive glass, FTO conductive glass doped with tin oxide, or graphene.
8. An adjustable polarization method applied to the adjustable polarization device according to any one of claims 1 to 7, the adjustable polarization device comprising: the first conductive layer, the first polarization layer arranged on the first conductive layer, the second polarization layer arranged on the first polarization layer, and the second conductive layer arranged on the second polarization layer; the first conducting layer and the second conducting layer are respectively connected with a power supply; wherein the material of the first polarizing layer is electro-optic crystal;
the method comprises the following steps:
when the adjustable polarization device works in a non-polarization state, the power supply does not apply a voltage signal;
when the adjustable polarization device works in a polarization state, the power supply applies a half-wave voltage signal;
the light passing through the adjustable polarization device is in a non-polarization state, and the light passing through the adjustable polarization device is in a preset polarization state.
9. A display device, comprising a first polarizer, an array substrate disposed on the first polarizer, a color filter substrate disposed on the array substrate, a second polarizer disposed on the color filter substrate, and a liquid crystal filled between the array substrate and the color filter substrate, wherein the second polarizer comprises at least one adjustable polarizer according to any one of claims 1 to 7.
10. A display device as claimed in claim 9, characterized in that the first polarizer comprises at least one adjustable polarizing means as claimed in any one of claims 1 to 7.
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| CN103941431B (en) | 2017-03-15 |
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