CN109976018B - Display device and manufacturing method thereof - Google Patents
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- CN109976018B CN109976018B CN201910284725.0A CN201910284725A CN109976018B CN 109976018 B CN109976018 B CN 109976018B CN 201910284725 A CN201910284725 A CN 201910284725A CN 109976018 B CN109976018 B CN 109976018B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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Abstract
The invention provides a display device and a preparation method thereof, wherein the display device comprises a first substrate and a second substrate which are arranged opposite to each other, a liquid crystal box is formed between the first substrate and the second substrate, and a liquid crystal mixture is injected in the liquid crystal box and comprises liquid crystal, polymer and photosensitive material. By adding the photosensitive material in the display device, when the intensity of ambient light is gradually increased, the photosensitive material becomes a conductor under the excitation action of light, the impedance of the polymer substrate becomes lower, and liquid crystal molecules can also deflect under the condition of unchanged driving voltage, so that the driving voltage of the display device is reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and a preparation method of the display device.
Background
The polymer dispersed liquid crystal display is widely used because of its excellent properties, but the driving voltage of the polymer dispersed liquid crystal is generally high, which affects the development of the polymer dispersed liquid crystal display.
Therefore, the conventional polymer dispersed liquid crystal display device has a technical problem of high driving voltage, and needs to be improved.
Disclosure of Invention
The invention provides a display device and a preparation method thereof, which are used for relieving the technical problem of high driving voltage of the conventional polymer dispersed liquid crystal display device.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a display device which comprises a first substrate and a second substrate which are arranged opposite to each other, wherein a liquid crystal box is formed between the first substrate and the second substrate, a liquid crystal mixture is injected into the liquid crystal box, and the liquid crystal mixture comprises liquid crystal, polymer and photosensitive material.
In the display device of the present invention, the photosensitive material has a structural formula of
Wherein A is a semiconductor material, and A is a silicon nitride,
is a methacrylic group, and n is 3 to 20.
In the display device of the present invention, the semiconductor material is at least one of cadmium sulfide, selenium, aluminum sulfide, and bismuth sulfide.
In the display device of the present invention, the polymer is at least one of polyacrylate, epoxy resin, acrylic acid, and polyimide.
In the display device of the present invention, the polymer is polyimide.
In the display device of the present invention, the liquid crystal is a negative type liquid crystal.
In the display device of the present invention, the liquid crystal mixture contains 70 to 90% by mass of the liquid crystal, 10 to 30% by mass of the polymer, and 1 to 5% by mass of the photosensitive material.
The invention also provides a preparation method of the display device, which comprises the following steps:
providing a first substrate and a second substrate arranged opposite to each other, wherein a liquid crystal box is formed between the first substrate and the second substrate;
the liquid crystal, polymer and photosensitive material are mixed and injected into the cell to form a liquid crystal mixture.
In the method for manufacturing a display device according to the present invention, the step of mixing a liquid crystal, a polymer and a photosensitive material and injecting the mixture into the liquid crystal cell to form a liquid crystal mixture includes: has a structural formula of
The photosensitive material is mixed with liquid crystal and polymer, wherein A is semiconductor material,
is a methacrylic group, and n is 3 to 20.
In the method for manufacturing a display device of the present invention, the semiconductor material is at least one of cadmium sulfide, selenium, aluminum sulfide, and bismuth sulfide.
The invention has the beneficial effects that: the invention provides a display device and a preparation method of the display device. By adding the photosensitive material in the display device, when the intensity of ambient light is gradually increased, the photosensitive material becomes a conductor under the excitation action of light, the impedance of the polymer substrate becomes lower, and liquid crystal molecules can also deflect under the condition of unchanged driving voltage, so that the driving voltage of the display device is reduced.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic view of a first structure of a display device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a display device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an embodiment of an apparatus for displaying an intense light;
FIG. 4 is a schematic diagram of an embodiment of a display device with strong light illumination;
fig. 5 is a flowchart of a method for manufacturing a display device according to an embodiment of the invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
The invention provides a display device, which is used for relieving the technical problem of high driving voltage of the conventional polymer dispersed liquid crystal display device.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention. The display device comprises a first substrate 10 and a second substrate 20 which are arranged opposite to each other, the first substrate 10 and the second substrate 20 are bonded together through a sealant 30 to form a liquid crystal cell (not shown), a liquid crystal mixture 40 is injected into the liquid crystal cell, and the liquid crystal mixture 40 comprises a liquid crystal 41, a polymer 42 and a photosensitive material 43.
The first substrate 10 has a first electrode 11 formed thereon, the second substrate has a second electrode 12 formed thereon, and the display device further includes a driving circuit (not shown) connected to the first electrode 11 and the second electrode 12 for applying a voltage to form an electric field between the first electrode 11 and the second electrode 12.
In this embodiment, the liquid crystal cell has a liquid crystal 41, a polymer 42, and a photosensitive material 43, wherein the liquid crystal 41 and the polymer 42 undergo polymerization under certain conditions to form a polymer dispersed liquid crystal.
The polymer dispersed liquid crystal is a composite material with special photoelectric property, which is formed by dispersing micromolecular liquid crystal into a polymer and carrying out polymerization reaction under certain conditions to form micron-sized liquid crystal droplets which are uniformly dispersed in a macromolecular network, wherein the droplet size is generally less than 10 mu m.
The polymer dispersed liquid crystal has different states in the case of voltage application and voltage non-application.
When no voltage is applied, the refractive index of the ordinary light of the liquid crystal microdroplets is mismatched with the refractive index of the polymer, and the direction of the director of the liquid crystal in different microdroplets is random, so that the polymer dispersed liquid crystal has a light scattering effect and is in a milky opaque state, and outside light cannot penetrate through the polymer dispersed liquid crystal; when voltage is applied, the liquid crystal directors are arranged along the direction of the electric field under the action of the electric field, so that the liquid crystal molecule directors in all the liquid crystal droplets are consistent, and at the moment, the refractive indexes of the liquid crystal droplets and the polymer are matched, so that the polymer dispersed liquid crystal presents a transparent characteristic, and external light can penetrate through the polymer dispersed liquid crystal.
The polymer dispersed liquid crystal combines liquid crystal and polymer, resulting in excellent overall properties. The liquid crystal molecules endow the polymer dispersed liquid crystal film with remarkable electro-optic characteristics, so that the polymer dispersed liquid crystal film is widely concerned and has wide application prospect. Compared with the traditional display device, the polymer dispersion type liquid crystal display has many advantages, such as no need of a polarizing film and an orientation layer, simple preparation process, easy preparation of a large-area flexible display and the like, and is widely applied to the aspects of optical modulators, heat-sensitive and pressure-sensitive devices, electric control glass, light valves, projection displays, electronic books and the like.
In this embodiment, the liquid crystal 41 is a negative liquid crystal, and the negative liquid crystal material has a different moment of inertia under the action of an electric field compared with the positive liquid crystal. Negative liquid crystal molecules show a lower tilt angle due to the fact that the negative liquid crystal molecules are perpendicular to the electric field distribution, and compared with positive liquid crystals, the negative liquid crystals are uniform in twist angle distribution, so that the negative liquid crystals show a higher transmittance which is 10% -15% higher than that of the positive liquid crystals.
The polymer is at least one of polyacrylate, epoxy resin, acrylic acid and polyimide. In this embodiment, the polymer 42 is polyimide, which is widely used because of its excellent properties such as high and low temperature resistance, high strength and modulus, low thermal expansion coefficient and dielectric constant, excellent insulating property, and irradiation resistance, but the polyimide polymer dispersed liquid crystal formed from polyimide and liquid crystal has a problem of excessive driving voltage, which is usually 50V or more, and greatly restricts the development of the polyimide polymer dispersed liquid crystal.
In one embodiment, the polyimide has the formula
In one embodiment, the polyimide has the formula
In this embodiment, a photosensitive material 43 is added to the liquid crystal cell to form a photoresistor, and the photosensitive material 43 has a structural formula
Wherein A is a semiconductor material, and A is a silicon nitride,
is a methacrylic group, n is 3 to 20, the semiconductor material is at least one of cadmium sulfide, selenium, aluminum sulfide and bismuth sulfide.
These semiconductor materials have a characteristic that their resistance value rapidly decreases under light irradiation of a specific wavelength. The carriers generated by illumination all participate in conduction, and drift under the action of an external electric field, electrons rush to the anode of the power supply, and holes rush to the cathode of the power supply, so that the resistance value of the photoresistor is rapidly reduced. The resistance of the photoresistor is different along with different illumination, so that the driving voltage of the polymer dispersed liquid crystal can be reduced.
In the liquid crystal mixture of the embodiment, the mass ratio of the liquid crystal 41 is 70% to 90%, the mass ratio of the polymer 42 is 10% to 30%, and the mass ratio of the photosensitive material 43 is 1% to 5%.
Fig. 2 is a schematic diagram of a display device according to an embodiment of the present invention under low light irradiation. The driving circuit applies a voltage to the first electrode 11 and the second electrode 12 to form an electric field, and the weak light 50 enters the liquid crystal cell through the first electrode 11 after entering from the first substrate 10 side.
In one embodiment, the first substrate 10 and the second electrode 20 are transparent substrates, and may be a transparent material such as glass, plastic, and the like. The first electrode 11 and the second electrode 12 are transparent electrodes, and may be, for example, transparent indium tin oxide or the like.
When the weak light 50 is irradiated, the photosensitive material 43 cannot be excited, the resistance of the polymer dispersed liquid crystal is relatively high, the voltage cannot drive the liquid crystal 41 to deflect, and most of the weak light 50 can pass through the display device.
Fig. 3 is a schematic view illustrating the strong light irradiation in the display device according to the embodiment of the present invention. The driving circuit applies a voltage to the first electrode 11 and the second electrode 12 to form an electric field, and the medium-intensity light 60 enters the liquid crystal cell through the first electrode 11 after entering from the first substrate 10 side.
In one embodiment, the first substrate 10 and the second electrode 20 are transparent substrates, and may be a transparent material such as glass, plastic, and the like. The first electrode 11 and the second electrode 12 are transparent electrodes, and may be, for example, transparent indium tin oxide or the like.
When the medium intensity light 60 is irradiated, the photosensitive material 43 becomes a conductor under the excitation action of the medium intensity light 60, at this time, the photon energy of the medium intensity light 60 is larger than the forbidden bandwidth of the semiconductor material, electrons in the valence band of the photosensitive material 43 can jump to the conduction band after absorbing the energy of one photon, and a hole with positive charge is generated in the valence band, and the electron-hole pair generated by the irradiation of light increases the number of carriers in the semiconductor material, so that the resistivity of the electron-hole pair is reduced, and the resistance value of the photosensitive material 43 is reduced.
Under the irradiation of the medium intense light 60, the resistance of the entire polymer dispersed liquid crystal in the liquid crystal cell becomes small, and when the voltage is not changed, the molecules of the liquid crystal 41 are deflected, and only part of the medium intense light 60 can pass through.
Fig. 4 is a schematic diagram illustrating an embodiment of the invention, showing an embodiment of a display device under strong illumination. The driving circuit applies a voltage to the first electrode 11 and the second electrode 12 to form an electric field, and strong light 70 enters the liquid crystal cell through the first electrode 11 after entering from the first substrate 10 side.
In one embodiment, the first substrate 10 and the second electrode 20 are transparent substrates, and may be a transparent material such as glass, plastic, and the like. The first electrode 11 and the second electrode 12 are transparent electrodes, and may be, for example, transparent indium tin oxide or the like.
When the strong light 70 irradiates, the photosensitive material 43 becomes a conductor under the excitation of the strong light 70, at this time, the photon energy of the strong light 70 is larger than the forbidden bandwidth of the semiconductor material, an electron in the valence band of the photosensitive material 43 can jump to the conduction band after absorbing the energy of a photon, and a positive hole is generated in the valence band, and the electron-hole pair generated by the irradiation of light increases the number of carriers in the semiconductor material, so that the resistivity thereof becomes smaller, thereby causing the resistance value of the photosensitive material 43 to decrease.
Because the stronger the illumination is, the lower the resistance is, under the illumination of the strong light 70, the impedance of the whole polymer dispersed liquid crystal in the liquid crystal box becomes smaller, and under the condition that the voltage is not changed, the molecules of the liquid crystal 41 deflect, and the deflection angle is larger, and most of the strong light 70 cannot pass through.
In the liquid crystal mixture in fig. 2, 3 and 4, the mass ratio of the liquid crystal 41 is 70% to 90%, the mass ratio of the polymer 42 is 10% to 30%, the mass ratio of the photosensitive material 43 is 1% to 5%, the driving voltage is 25V, and the illumination wavelength of the illumination is 365 nm, wherein the light intensity of the medium-intensity light 60 is 15 times that of the weak light 50, and the light intensity of the strong light 70 is 30 times that of the weak light 50. The light with different intensities has different transmittances of the display device,
when the weak light 50 is used for irradiation, the light transmittance of the display device is 90%, when the strong light 60 is used for irradiation, the light transmittance of the display device is 55%, and when the strong light 70 is used for irradiation, the light transmittance of the display device is 25%, namely under the condition that the driving voltage is not changed, the light transmittance of the display device is gradually reduced along with the increase of the light intensity.
The invention adds photosensitive material 43 into the liquid crystal box, when the outside light is strong, the resistance value of the photosensitive material 43 under the illumination effect is reduced, so that the impedance of the whole polymer dispersed liquid crystal is reduced, therefore, the molecules of the liquid crystal 41 can also deflect to allow the light to penetrate, thereby reducing the driving voltage of the display device.
The display device provided by the invention can be used as a light-operated intelligent display device for intelligent windows and the like because the display device can transmit light when the ambient light is weak light, can not transmit light when the ambient light is strong light, and can control the switch through the light.
As shown in fig. 5, the present invention also provides a method for manufacturing a display device, including:
s1: providing a first substrate and a second substrate which are arranged opposite to each other, wherein a liquid crystal box is formed between the first substrate and the second substrate;
s2: the liquid crystal, polymer and photosensitive material are mixed and injected into a liquid crystal cell to form a liquid crystal mixture.
The method is described in detail below with reference to fig. 1 to 4.
In S1, a first substrate and a second substrate are provided that are provided to the cell, with a liquid crystal cell formed between the first substrate and the second substrate. The first substrate 10 and the second substrate 20 are bonded together by the sealant 30 to form a liquid crystal cell (not shown), the first substrate 10 is formed with a first electrode 11, the second substrate is formed with a second electrode 12, and the display device further includes a driving circuit (not shown), the driving circuit is connected to the first electrode 11 and the second electrode 12, and is configured to apply a voltage, so that an electric field is formed between the first electrode 11 and the second electrode 12.
In one embodiment, the first substrate 10 and the second electrode 20 are transparent substrates, and may be a transparent material such as glass, plastic, and the like. The first electrode 11 and the second electrode 12 are transparent electrodes, and may be, for example, transparent indium tin oxide or the like.
In S2, the liquid crystal, the polymer, and the photosensitive material are mixed and injected into a liquid crystal cell to form a liquid crystal mixture.
In the liquid crystal mixture of the embodiment, the mass ratio of the liquid crystal 41 is 70% to 90%, the mass ratio of the polymer 42 is 10% to 30%, and the mass ratio of the photosensitive material 43 is 1% to 5%, and the three are mixed and heated to a molten state, filled in a liquid crystal box, cooled, and illuminated to form the liquid crystal mixture 40.
The liquid crystal 41 and the polymer 42 are polymerized under certain conditions to form polymer dispersed liquid crystal.
The polymer dispersed liquid crystal is a composite material with special photoelectric property, which is formed by dispersing micromolecular liquid crystal into a polymer and carrying out polymerization reaction under certain conditions to form micron-sized liquid crystal droplets which are uniformly dispersed in a macromolecular network, wherein the droplet size is generally less than 10 mu m.
The polymer dispersed liquid crystal has different states in the case of voltage application and voltage non-application.
When no voltage is applied, the refractive index of the ordinary light of the liquid crystal microdroplets is mismatched with the refractive index of the polymer, and the direction of the director of the liquid crystal in different microdroplets is random, so that the polymer dispersed liquid crystal has a light scattering effect and is in a milky opaque state, and outside light cannot penetrate through the polymer dispersed liquid crystal; when voltage is applied, the liquid crystal directors are arranged along the direction of the electric field under the action of the electric field, so that the liquid crystal molecule directors in all the liquid crystal droplets are consistent, and at the moment, the refractive indexes of the liquid crystal droplets and the polymer are matched, so that the polymer dispersed liquid crystal presents a transparent characteristic, and external light can penetrate through the polymer dispersed liquid crystal.
The polymer dispersed liquid crystal combines liquid crystal and polymer, resulting in excellent overall properties. The liquid crystal molecules endow the polymer dispersed liquid crystal film with remarkable electro-optic characteristics, so that the polymer dispersed liquid crystal film is widely concerned and has wide application prospect. Compared with the traditional display device, the polymer dispersion type liquid crystal display has many advantages, such as no need of a polarizing film and an orientation layer, simple preparation process, easy preparation of a large-area flexible display and the like, and is widely applied to the aspects of optical modulators, heat-sensitive and pressure-sensitive devices, electric control glass, light valves, projection displays, electronic books and the like.
The liquid crystal 41 is a negative type liquid crystal, and the negative type liquid crystal material has a different moment of inertia under the action of an electric field compared with the positive type liquid crystal. Negative liquid crystal molecules show a lower tilt angle due to the fact that the negative liquid crystal molecules are perpendicular to the electric field distribution, and compared with positive liquid crystals, the negative liquid crystals are uniform in twist angle distribution, so that the negative liquid crystals show a higher transmittance which is 10% -15% higher than that of the positive liquid crystals.
The polymer is at least one of polyacrylate, epoxy resin, acrylic acid and polyimide. In this embodiment, the polymer 42 is polyimide, which is widely used because of its excellent properties such as high and low temperature resistance, high strength and modulus, low thermal expansion coefficient and dielectric constant, excellent insulating property, and irradiation resistance, but the polyimide polymer dispersed liquid crystal formed from polyimide and liquid crystal has a problem of excessive driving voltage, which is usually 50V or more, and greatly restricts the development of the polyimide polymer dispersed liquid crystal.
In one embodiment, the polyimide has the formula
In one embodiment, the polyimide has the formula
In this embodiment, a photosensitive material 43 is added to the liquid crystal cell to form a photoresistor, and the photosensitive material 43 has a structural formula
Wherein A is a semiconductor material, and A is a silicon nitride,
is a methacrylic acid group, n is 3 to 20, and the semiconductor material is at least one of cadmium sulfide, selenium, aluminum sulfide and bismuth sulfide.
These semiconductor materials have a characteristic that their resistance value rapidly decreases under light irradiation of a specific wavelength. The carriers generated by illumination all participate in conduction, and drift under the action of an external electric field, electrons rush to the anode of the power supply, and holes rush to the cathode of the power supply, so that the resistance value of the photoresistor is rapidly reduced. The resistance of the photoresistor is different along with different illumination, so that the driving voltage of the polymer dispersed liquid crystal can be reduced.
In one embodiment, the heating temperature is 100 to 150 degrees celsius, and the liquid crystal 41 and the polymer 42 undergo polymerization to form polymer dispersed liquid crystal.
In one embodiment, the cooling rate is 5-10 ℃/min to ensure that the liquid crystal 41, the polymer 42 and the photosensitive 43 are uniformly distributed in the liquid crystal cell after cooling.
In one embodiment, the illumination used after cooling is ultraviolet light.
The liquid crystal 41, the polymer 42 and the photosensitive material 43 are mixed, heated, injected, cooled and illuminated to form a liquid crystal mixture 40 which is filled in a liquid crystal box, and the resistance value of the photoresistor is different along with the illumination difference, so that the driving voltage of the polymer dispersed liquid crystal can be reduced.
When the ambient light is weak light 50, the photosensitive material 43 cannot be excited, the impedance of the polymer dispersed liquid crystal is relatively high, the voltage cannot drive the liquid crystal 41 to deflect, and most of the weak light 50 can pass through the display device.
When the ambient light is the medium-intensity light 60, the photosensitive material 43 becomes a conductor under the excitation action of the medium-intensity light 60, at this time, the photon energy of the medium-intensity light 60 is larger than the forbidden bandwidth of the semiconductor material, an electron in the valence band of the photosensitive material 43 can jump to the conduction band after absorbing the energy of one photon, and a positive hole is generated in the valence band, and the electron-hole pair generated by illumination has the number of carriers in the semiconductor material, so that the resistivity of the electron-hole pair is reduced, and the resistance value of the photosensitive material 43 is reduced.
Under the irradiation of the medium intense light 60, the resistance of the entire polymer dispersed liquid crystal in the liquid crystal cell becomes small, and when the voltage is not changed, the molecules of the liquid crystal 41 are deflected, and only part of the medium intense light 60 can pass through.
When the ambient light is the strong light 70, the photosensitive material 43 becomes a conductor under the excitation of the strong light 70, at this time, the photon energy of the strong light 70 is larger than the forbidden bandwidth of the semiconductor material, an electron in the valence band of the photosensitive material 43 can jump to the conduction band after absorbing the energy of one photon, and a hole with positive charge is generated in the valence band, and the electron-hole generated by illumination pair the number of carriers in the semiconductor material, so that the resistivity thereof is reduced, thereby causing the resistance value of the photosensitive material 43 to be reduced.
Because the stronger the illumination is, the lower the resistance is, under the illumination of the strong light 70, the impedance of the whole polymer dispersed liquid crystal in the liquid crystal box becomes smaller, and under the condition that the voltage is not changed, the molecules of the liquid crystal 41 deflect, and the deflection angle is larger, and most of the strong light 70 cannot pass through.
That is, the light transmittance of the display device gradually decreases as the light intensity increases without changing the driving voltage. The invention adds photosensitive material 43 into the liquid crystal box, when the outside light is strong, the resistance value of the photosensitive material 43 under the illumination effect is reduced, so that the impedance of the whole polymer dispersed liquid crystal is reduced, therefore, the molecules of the liquid crystal 41 can also deflect to allow the light to penetrate, thereby reducing the driving voltage of the display device.
The display device provided by the invention can be used as a light-operated intelligent display device for intelligent windows and the like because the display device can transmit light when the ambient light is weak light, can not transmit light when the ambient light is strong light, and can control the switch through the light.
According to the above embodiments:
the invention provides a display device and a preparation method thereof, wherein the display device comprises a first substrate and a second substrate which are arranged opposite to each other, a liquid crystal box is formed between the first substrate and the second substrate, and a liquid crystal mixture is injected in the liquid crystal box and comprises liquid crystal, polymer and photosensitive material. By adding the photosensitive material in the display device, when the intensity of ambient light is gradually increased, the photosensitive material becomes a conductor under the excitation action of light, the impedance of the polymer substrate becomes lower, and liquid crystal molecules can also deflect under the condition of unchanged driving voltage, so that the driving voltage of the display device is reduced.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (8)
1. The display device is characterized by comprising a first substrate and a second substrate which are arranged in a paired mode, a liquid crystal box is formed between the first substrate and the second substrate, a liquid crystal mixture is injected into the liquid crystal box, the liquid crystal mixture comprises liquid crystal, polymer and photosensitive material, and the structural formula of the photosensitive material is shown in the specification
Wherein A is a semiconductor material, and A is a silicon nitride,
is a methacrylic group, and n is 3 to 20.
2. The display device of claim 1, wherein the semiconductor material is at least one of cadmium sulfide, selenium, aluminum sulfide, and bismuth sulfide.
3. The display device of claim 1, wherein the polymer is at least one of a polyacrylate, an epoxy, an acrylic, and a polyimide.
4. The display device of claim 3, wherein the polymer is a polyimide.
5. The display device of claim 1, wherein the liquid crystal is a negative-type liquid crystal.
6. The display device according to claim 1, wherein the liquid crystal mixture contains 70 to 90% by mass of the liquid crystal, 10 to 30% by mass of the polymer, and 1 to 5% by mass of the photosensitive material.
7. A method of manufacturing a display device, comprising:
providing a first substrate and a second substrate arranged opposite to each other, wherein a liquid crystal box is formed between the first substrate and the second substrate;
mixing liquid crystal, polymer and photosensitive material, and injecting into the liquid crystal box to form liquid crystal mixture, wherein the photosensitive material has a structural formula
Wherein A is a semiconductor material, and A is a silicon nitride,
is a methacrylic group, and n is 3 to 20.
8. The method of manufacturing a display device according to claim 7, wherein the semiconductor material is at least one of cadmium sulfide, selenium, aluminum sulfide, and bismuth sulfide.
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| PCT/CN2020/070481 WO2020207077A1 (en) | 2019-04-10 | 2020-01-06 | Display apparatus and manufacturing method therefor |
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| CN109976018B (en) * | 2019-04-10 | 2020-09-01 | 深圳市华星光电半导体显示技术有限公司 | Display device and manufacturing method thereof |
| CN110540645B (en) * | 2019-09-12 | 2021-03-16 | 深圳市华星光电半导体显示技术有限公司 | Prepolymer of polymer dispersed liquid crystal, polymer dispersed liquid crystal composition and display panel |
| CN111493633B (en) * | 2020-04-27 | 2021-12-07 | 东莞蓝海芯科技有限公司 | Intelligent control curtain with dimming function and intelligent control screen |
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| CN109976018A (en) | 2019-07-05 |
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