WO2021082236A1

WO2021082236A1 - Display device and driving method therefor

Info

Publication number: WO2021082236A1
Application number: PCT/CN2019/127618
Authority: WO
Inventors: 黄东晨; 苏赞加
Original assignee: 惠州市华星光电技术有限公司
Priority date: 2019-10-28
Filing date: 2019-12-23
Publication date: 2021-05-06
Also published as: CN110764324A; CN110764324B

Abstract

A display device (100) and a driving method therefor. The display device (100) comprises: a first liquid crystal cell (200) comprising a first liquid crystal layer (220); and a second liquid crystal cell (300) arranged opposite the first liquid crystal cell (200) and comprising a second liquid crystal layer (320), wherein the first liquid crystal layer (220) and the second liquid crystal layer (320) are of different types.

Description

Display device and driving method thereof

Technical field

This application relates to the field of display, and in particular to a display device and a driving method thereof.

Background technique

Liquid Crystal Display (LCD) is currently the most widely used display product on the market. Its production process technology is very mature, product yield is high, production cost is relatively low, and market acceptance is high.

The surface of the liquid crystal display has a high reflectivity. Therefore, when the laser light emitted by the laser pointer shines on the surface of the liquid crystal display, specular reflection will occur on the surface of the liquid crystal display, which reduces the visual angle of view of the laser in all directions and reduces the user experience.

Therefore, there is an urgent need for a display device and a driving method thereof to solve the above technical problems.

technical problem

The present application provides a display device and a driving method thereof, so as to solve the technical problem of the small visual angle of the laser on the liquid crystal display device.

Technical solutions

A display device includes:

The first liquid crystal cell includes a first array substrate, a color filter layer disposed opposite to the first array substrate, and a first liquid crystal layer located between the first array substrate and the color filter layer;

The second liquid crystal cell disposed opposite to the first liquid crystal cell includes a driving circuit board disposed close to the first liquid crystal cell, a cover plate disposed away from the first liquid crystal cell, and a driving circuit board disposed between the driving circuit and the first liquid crystal cell. The second liquid crystal layer between the cover plates;

Wherein, the types of the first liquid crystal layer and the second liquid crystal layer are different.

In the display device of the present application, the material of the first liquid crystal layer includes nematic liquid crystal;

The material of the second liquid crystal layer includes polymer dispersed liquid crystal.

In the display device of the present application, the display device further includes a photosensitive device for identifying an external light source irradiated on the second liquid crystal layer.

In the display device of the present application, the display device further includes a semi-diffuse reflection and semi-transparent layer, and the semi-diffuse reflection and semi-transparent layer is located between the first liquid crystal cell and the second liquid crystal cell;

Wherein, the semi-diffuse reflection and semi-transparent layer transmits the incident light on the side close to the first liquid crystal cell, and diffusely reflects the incident light on the side away from the first liquid crystal cell.

In the display device of the present application, the semi-diffuse reflection and semi-transparent layer is provided as a whole layer.

In the display device of the present application, the orthographic projection of the semi-diffuse reflection and translucent layer on the color filter substrate is located in the light shielding layer of the color filter substrate.

In the display device of the present application, the semi-diffuse reflection and semi-transparent layer includes diffuse reflection protrusions on a side away from the first liquid crystal cell.

A driving method using the display device of the present application includes:

Scanning the target display device to obtain the first light intensity value of the first light source;

When the first light intensity value is greater than the first threshold, the first position signal and the first control signal of the first light source at the first position of the two liquid crystal layers are output, so that the liquid crystal corresponding to the first position is in a non-volatile state. Working status

When the first light intensity value is less than the first threshold value, a second control signal is output so that the liquid crystal corresponding to the first position is in a working state.

In the driving method using the display device of the present application, the step of obtaining the light intensity value of the first light source includes:

Scanning the target display device with a photosensitive device to obtain the first light signal of the first light source;

Calculating a first light intensity value of the first light source according to the first light signal;

The first light intensity value is output to the processor of the display device.

In the driving method using the display device of the present application, the first light source is one of laser, ultraviolet light or infrared light.

Beneficial effect

In this application, a second liquid crystal cell is arranged on the first liquid crystal cell. When a laser with a certain light intensity is irradiated on the display device, the second liquid crystal layer corresponding to the irradiated area is in an off disordered state, and the laser passes through the liquid crystal molecules in this area. Diffuse reflection occurs and exits the display device, which reduces the specular reflection of the laser on the display device, increases the visual angle of the laser, and improves the user experience.

Description of the drawings

Figure 1 is the first structure diagram of the display device of this application;

FIG. 2 is a schematic diagram of the first structure effect of the display device of this application;

FIG. 3 is a second structure diagram of the display device of this application;

FIG. 4 is a partial projection view of the second structure diagram of the display panel of this application;

FIG. 5 is a partial diagram of the third structure diagram of the display panel of this application;

FIG. 6 is a partial view of the fourth structure diagram of the display panel of this application;

FIG. 7 is a schematic diagram of the second to fourth structure effects of the display device of this application;

FIG. 8 is a flowchart of a driving method of the display device of the present application.

Embodiments of the present invention

In order to make the purpose, technical solutions and effects of this application clearer and clearer, the following further describes this application in detail with reference to the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application.

In the prior art, the reflectance of the surface of the liquid crystal display is relatively high. Therefore, when the laser light emitted by the laser pointer irradiates the surface of the liquid crystal display, specular reflection occurs on the surface of the liquid crystal display, which reduces the visual angle of the laser in all directions and reduces user experience. Based on this technical problem, this application proposes a display device and a driving method thereof.

Please refer to FIG. 1 to FIG. 7, the display device 100 includes:

The first liquid crystal cell 200 includes a first array substrate 210, a color filter layer 230 disposed opposite to the first array substrate 210, and a first array substrate 210 and a color filter layer 230 located between the first array substrate 210 and the color filter layer 230. Liquid crystal layer 220;

The second liquid crystal cell 300 disposed opposite to the first liquid crystal cell 200 includes a driving circuit board 310 disposed close to the first liquid crystal cell 200, a cover plate 330 disposed away from the first liquid crystal cell 200, and The second liquid crystal layer 320 between the driving circuit 310 and the cover plate 330;

Wherein, the types of the first liquid crystal layer 220 and the second liquid crystal layer 320 are different.

The technical solution of the present application will now be described in conjunction with specific embodiments.

Example one

Referring to FIG. 1, the display device 100 includes:

The first liquid crystal cell 200 includes a first array substrate 210, a color filter layer 230 disposed opposite to the first array substrate 210, and a first array substrate 210 and a color filter layer 230 located between the first array substrate 210 and the color filter layer 230. The liquid crystal layer 220.

The second liquid crystal cell 300 disposed opposite to the first liquid crystal cell 200 includes a driving circuit board 310 disposed close to the first liquid crystal cell 200, a cover plate 330 disposed away from the first liquid crystal cell 200, and The second liquid crystal layer 320 between the driving circuit 310 and the cover plate 330.

In this embodiment, the material of the first liquid crystal layer 220 includes nematic liquid crystal. The material of the second liquid crystal layer 320 includes polymer dispersed liquid crystal. When the polymer dispersed liquid crystal is subjected to an electric field, it can form an orderly optical axis orientation, and the liquid crystal layer is in a transparent state; when the electric field is removed, the liquid crystal droplets return to free orientation, and the liquid crystal layer changes from a transparent state to an astigmatic state, outside the display device The incident laser light diffusely reflects out of the display device in this area to achieve the effect of increasing the viewing angle of the laser light. Please refer to Figure 2 for details.

In this embodiment, the display device 100 further includes a photosensitive device (not shown), and the photosensitive device is used to identify the external light source irradiated on the second liquid crystal layer 320. The photosensitive device recognizes and calculates the light intensity by receiving a light signal from an external light source, and outputs the light intensity information to the processor of the display device. The processor determines whether to turn off the liquid crystal electric field irradiated by the external light source, and at the same time accurately Position the laser irradiation area to increase the haze of the area, so that more diffuse reflection of the laser light is emitted from the display device in this area.

In this embodiment, the photosensitive device is arranged between the first liquid crystal cell 200 and the second liquid crystal cell 300. The photosensitive device can better receive the light signal of the light source.

In this embodiment, the photosensitive device is arranged between the cover plate 330 and the second liquid crystal layer 320. The photosensitive device can receive the light information of the light source more timely, thereby changing the working state of the liquid crystal.

In this embodiment, the photosensitive device is disposed between the first liquid crystal layer 220 and the first array substrate 210. The photosensitive device can receive the light signal of the light source without affecting the normal light-emitting operation of the display device.

In this embodiment, the color filter layer 230 includes a color resist layer 231 and a light shielding layer 232. The color resist layer 231 includes a red color resist, a green color resist or a blue color resist, which is not limited here. The light shielding layer 232 and the color resist layer 231 are provided in the same layer.

In this embodiment, a polarizer 240 is provided on the color film layer 230. Please refer to FIG. 1 for details.

In this embodiment, the first liquid crystal layer 220 includes a first upper electrode layer 222 on the side away from the first array substrate 210, and a first lower electrode layer 221 on the side close to the first array substrate 210. Specifically, Please refer to Figure 1.

In this embodiment, the second liquid crystal layer 320 includes a second upper electrode layer 322 on the side away from the first liquid crystal cell 200, and a second lower electrode layer 321 on the side close to the first liquid crystal cell 200. Specifically, Please refer to Figure 1.

In this embodiment, the first upper electrode layer 222 includes a first upper electrode, a first upper substrate located on the first upper electrode, and the first lower electrode layer includes a first lower electrode located on the first upper electrode. The first lower substrate on the lower electrode.

In this embodiment, the second upper electrode layer 322 includes a second upper electrode and a second upper substrate on the second upper electrode, and the second lower electrode layer 321 includes a second lower electrode and is located on the The second lower substrate on the second lower electrode.

In this embodiment, a second liquid crystal cell is arranged on the first liquid crystal cell, and a laser with a certain light intensity irradiates the second liquid crystal cell. The photosensitive device accurately locates the laser irradiation area by identifying the light information of the light source, so that the second liquid crystal layer in the irradiation area In a disordered state, the haze of the area increases, and the laser light diffuses through the liquid crystal molecules in the irradiated area and exits the display device, reaching the human eye, reducing the glare and glare phenomenon, enhancing the diffuse reflection of the laser, and increasing the laser The visual angle of view improves the user experience.

Example two

Please refer to FIG. 3, this embodiment is the same as or similar to the first embodiment, and the difference lies in:

The display device 100 further includes a semi-diffuse reflection and semi-transparent layer 500, and the semi-diffuse reflection and semi-transparent layer 500 is located between the first liquid crystal cell 200 and the second liquid crystal cell 300.

In this embodiment, the semi-diffuse reflection and semi-transparent layer 500 transmits the incident light on the side close to the first liquid crystal cell 200 and diffusely reflects the incident light on the side away from the first liquid crystal cell 200. When the laser light does not increase the haze of the second liquid crystal cell 300, the laser light passes through the second liquid crystal cell 300, and the semi-diffuse reflective semi-transparent layer 500 can better diffuse the laser light and emit the laser light. The display device 100 provides the user with a better visual angle. Please refer to FIG. 3 and FIG. 7 for details.

In this embodiment, the semi-diffuse reflection and semi-transparent layer 500 is provided as a whole layer. The semi-diffuse reflection and semi-transparent layer 500 provided in the entire layer may not need to go through the illumination and etching process, which saves the process, has a better diffuse reflection effect, and increases the user's visual angle of view.

In this embodiment, the orthographic projection of the semi-diffuse reflection and translucent layer 500 on the color filter layer 230 is located in the light shielding layer 232 of the color filter layer 230. The setting position of the diffuse reflection translucent layer 500 does not reduce the transmittance of the normal light of the display device 100 while completing the diffuse reflection of the laser light, and ensures the light quality of the normal display. Please refer to the figure for details. 4.

In this embodiment, the semi-diffuse reflection and semi-transparent layer 500 includes diffuse reflection protrusions 510 on the side away from the first liquid crystal cell 200. The diffuse reflection protrusion 510 can better diffuse the laser light and achieve the effect of increasing the viewing angle of the user. Please refer to FIG. 5 for details.

In this embodiment, the shape of the reflective protrusion 510 may include a hemispherical shape, a pyramid shape, and a cubic shape.

In this embodiment, the semi-diffuse reflection and semi-transparent layer 500 includes a diffuse reflection recess 520 on a side away from the first liquid crystal cell 200. The diffuse reflection recess 520 can better diffuse the laser light and achieve the effect of increasing the viewing angle of the user. Please refer to FIG. 6 for details.

In this embodiment, the shape of the reflective recess 520 may include a hemispherical shape, a pyramid shape, and a cubic shape.

In this embodiment, a semi-diffuse reflection and semi-transparent layer is arranged between the first liquid crystal cell and the second liquid crystal cell, so that the laser light passing through the second liquid crystal cell is more diffusely reflected and emitted out of the display device, which improves the light utilization rate. The visual angle of view of the laser is increased, and the user experience is improved.

In the first and second embodiments above, by arranging the second liquid crystal cell on the first liquid crystal cell, a laser with a certain light intensity irradiates the second liquid crystal cell, so that the second liquid crystal layer in the irradiated area is in an off disordered state. The haze in this area increases, and the laser light diffuses through the liquid crystal molecules in this area and exits the display device, reaching the human eye, increasing the visual angle of the laser light and improving the user experience.

Please refer to FIG. 8. This application also proposes a driving method using the display device 100, including:

S10. Scan the target display device to obtain the first light intensity value of the first light source 600.

S20. When the first light intensity value is greater than the first threshold value, output the first position signal and the first control signal of the first light source at the first position of the two liquid crystal layers to make the liquid crystal corresponding to the first position In a non-working state.

S30: When the first light intensity value is less than the first threshold value, output a second control signal so that the liquid crystal corresponding to the first position is in a working state.

In this application, the second liquid crystal cell is driven to identify the laser irradiation position and light intensity, locate the liquid crystal that needs to change the working state, and change the working state of the liquid crystal to increase the haze of the laser irradiation area. The liquid crystal molecules are diffusely reflected out of the display device and reach the human eye, which increases the user's visual angle of view and improves the user experience.

Example three

S10. Scan the target display device 100 to obtain the first light intensity value of the first light source 600.

In this embodiment, the first light source 600 includes one of laser, ultraviolet light or infrared light, which is not limited herein.

In this embodiment, the step of obtaining the light intensity value of the first light source includes:

S11. Scan the target display device 100 with a photosensitive device to obtain the first light signal of the first light source 600.

S12. Calculate the first light intensity value of the first light source 600 according to the first light signal.

S13. Output the first light intensity value to the processor of the display device 100.

In this embodiment, the processor may include the central processing unit of the display device 100 and the microprocessor of the photosensitive device. There is no restriction here.

In this embodiment, the material of the second liquid crystal layer 320 includes polymer dispersed liquid crystal. When the polymer dispersed liquid crystal is subjected to an electric field, it can form an orderly optical axis orientation, and the liquid crystal layer is in a transparent state; when the electric field is removed, the liquid crystal droplets return to free orientation, and the liquid crystal layer changes from a transparent state to an astigmatic state, outside the display device The incident laser light diffusely reflects out of the display device in this area to achieve the effect of increasing the viewing angle of the laser light. Please refer to Figure 2 for details.

In this embodiment, the first threshold may be specifically set according to the use scene. When the first threshold is high, the semi-diffuse reflection and semi-transparent layer 500 may be used for diffuse reflection to achieve the effect of increasing the visible viewing angle of the laser; When the first threshold is lower, the diffuse reflection of the laser with weaker light intensity can be improved, the visible viewing angle of the laser can be increased, and the user experience can be improved. The first threshold is not limited here.

In this embodiment, the method for making the liquid crystal corresponding to the first position in a non-working state includes changing the potential of the second lower electrode of the second lower electrode layer 321 corresponding to the first position, and turning off the first position The electric field at the corresponding liquid crystal. The electric field at the liquid crystal corresponding to the first position is turned off, the liquid crystal corresponding to the first position is in a non-working state, the liquid crystal droplets recover their free orientation, the liquid crystal layer changes from a transparent state to an astigmatic state, and the haze of the liquid crystal layer Increased, the laser diffusely reflects out of the display device in this area, and the visible viewing angle of the laser is increased. Please refer to Figure 2 for details.

In this embodiment, the method for making the liquid crystal corresponding to the first position work includes changing the potential of the second lower electrode of the second lower electrode layer 321 corresponding to the first position, and turning on the second lower electrode corresponding to the first position. The electric field at the liquid crystal causes the liquid crystal corresponding to the first position to be in a working state, the liquid crystal forms an orderly optical axis orientation, the liquid crystal layer is in a transparent state, and the display device works normally.

In the third embodiment above, the second liquid crystal cell is driven to identify the laser irradiation position and light intensity, locate the liquid crystal that needs to change the working state, change the working state of the liquid crystal, and change the size of the haze. The laser passes through the liquid crystal in this area. The molecule diffuses and reflects out of the display device and reaches the human eye, which increases the user's visual angle of view and improves the user experience.

The application discloses a display device and a driving method thereof. The display device includes: a first liquid crystal cell, including a first liquid crystal layer; a second liquid crystal cell disposed opposite to the first liquid crystal cell, including a second liquid crystal layer; wherein the first liquid crystal layer and the second liquid crystal layer The types are not the same. In this application, a second liquid crystal cell is arranged on the first liquid crystal cell. When a laser with a certain light intensity is irradiated on the display device, the second liquid crystal layer corresponding to the irradiated area is in an off disordered state, and the laser passes through the liquid crystal molecules in this area. Diffuse reflection occurs and exits the display device, which reduces the specular reflection of the laser on the display device, increases the visual angle of the laser, and improves the user experience.

It can be understood that for those of ordinary skill in the art, equivalent replacements or changes can be made according to the technical solutions of the present application and its inventive concept, and all these changes or replacements shall fall within the protection scope of the appended claims of the present application.

Claims

A display device, which includes:

The first liquid crystal cell includes a first array substrate, a color filter layer disposed opposite to the first array substrate, and a first liquid crystal layer located between the first array substrate and the color filter layer;

The second liquid crystal cell disposed opposite to the first liquid crystal cell includes a driving circuit board disposed close to the first liquid crystal cell, a cover plate disposed away from the first liquid crystal cell, and a driving circuit board disposed between the driving circuit and the first liquid crystal cell. The second liquid crystal layer between the cover plates;

Wherein, the types of the first liquid crystal layer and the second liquid crystal layer are different.
The display device according to claim 1, wherein the material of the first liquid crystal layer comprises nematic liquid crystal;

The material of the second liquid crystal layer includes polymer dispersed liquid crystal.
The display device according to claim 1, wherein the display device further comprises a photosensitive device for identifying an external light source irradiated on the second liquid crystal layer.
The display device according to claim 1, wherein:

The display device further includes a semi-diffuse reflection and semi-transparent layer, and the semi-diffuse reflection and semi-transparent layer is located between the first liquid crystal cell and the second liquid crystal cell;

Wherein, the semi-diffuse reflection and semi-transparent layer transmits the incident light on the side close to the first liquid crystal cell, and diffusely reflects the incident light on the side away from the first liquid crystal cell.
4. The display device according to claim 4, wherein the semi-diffuse reflection and semi-transparent layer is provided as a whole layer.
4. The display device of claim 4, wherein the orthographic projection of the semi-diffuse reflection and translucent layer on the color filter substrate is located in the light shielding layer of the color filter layer.
4. The display device according to claim 4, wherein the semi-diffuse reflection and semi-transparent layer includes diffuse reflection protrusions on a side away from the first liquid crystal cell.
A driving method of a display device, which includes

Scanning the target display device to obtain the first light intensity value of the first light source;

When the first light intensity value is greater than the first threshold, the first position signal and the first control signal of the first light source at the first position of the two liquid crystal layers are output, so that the liquid crystal corresponding to the first position is in a non-volatile state. Working status

When the first light intensity value is less than the first threshold value, a second control signal is output so that the liquid crystal corresponding to the first position is in a working state.
8. The driving method of the display device according to claim 8, wherein the step of obtaining the light intensity value of the first light source comprises:

Scanning the target display device with a photosensitive device to obtain the first light signal of the first light source;

Calculating a first light intensity value of the first light source according to the first light signal;

The first light intensity value is output to the processor of the display device.
8. The driving method of the display device according to claim 8, wherein the first light source is one of laser, ultraviolet light or infrared light.
8. The driving method of the display device according to claim 8, the display device comprising:

The first liquid crystal cell includes a first array substrate, a color filter layer disposed opposite to the first array substrate, and a first liquid crystal layer located between the first array substrate and the color filter layer;

The second liquid crystal cell disposed opposite to the first liquid crystal cell includes a driving circuit board disposed close to the first liquid crystal cell, a cover plate disposed away from the first liquid crystal cell, and a driving circuit board disposed between the driving circuit and the first liquid crystal cell. The second liquid crystal layer between the cover plates;

Wherein, the types of the first liquid crystal layer and the second liquid crystal layer are different.
11. The driving method of the display device according to claim 11, wherein the material of the first liquid crystal layer comprises nematic liquid crystal;

The material of the second liquid crystal layer includes polymer dispersed liquid crystal.
11. The driving method of the display device according to claim 11, wherein the display device further comprises a photosensitive device for identifying an external light source irradiated on the second liquid crystal layer.
The driving method of the display device according to claim 11, wherein:

The display device further includes a semi-diffuse reflection and semi-transparent layer, and the semi-diffuse reflection and semi-transparent layer is located between the first liquid crystal cell and the second liquid crystal cell;

Wherein, the semi-diffuse reflection and semi-transparent layer transmits the incident light on the side close to the first liquid crystal cell, and diffusely reflects the incident light on the side away from the first liquid crystal cell.
14. The driving method of the display device according to claim 14, wherein the semi-diffuse reflection and semi-transparent layer is provided as a whole layer.
14. The driving method of the display device according to claim 14, wherein the orthographic projection of the semi-diffuse reflection and semi-transparent layer on the color filter substrate is located in the light shielding layer of the color filter layer.
14. The driving method of the display device according to claim 14, wherein the semi-diffuse reflection and semi-transparent layer includes diffuse reflection protrusions on a side away from the first liquid crystal cell.