阅读说明：本技术 显示面板、显示装置及显示驱动方法 (Display panel, display device and display driving method ) 是由 谢昌翰 于 2021-09-14 设计创作，主要内容包括：本申请实施例提供了一种显示面板、显示装置及显示驱动方法。显示面板包括光控液晶层,光控液晶层包括第一液晶层、设置在第一液晶层一侧的第一取向层和设置在第一液晶层另一侧的第二取向层,第一取向层由光控取向材料制成；光源组件,光源组件设置在光控液晶层的一侧,光源组件配置为向光控液晶层提供入射光,光源组件包括第一光源,第一光源的入射光对光控取向材料的取向方向具有改写作用。对第一取向层的取向方向进行改写之后,可利用普通照射光作为光源,使普通照射光入射光控液晶层,由于光控液晶层的第一液晶层的液晶分子处于稳定的偏转状态,直到再次开启第一光源才会被重写。因此,普通照射光经过光控液晶层后可实现低刷新率下的稳态显示。(The embodiment of the application provides a display panel, a display device and a display driving method. The display panel comprises a light-operated liquid crystal layer, wherein the light-operated liquid crystal layer comprises a first liquid crystal layer, a first alignment layer and a second alignment layer, the first alignment layer is arranged on one side of the first liquid crystal layer, the second alignment layer is arranged on the other side of the first liquid crystal layer, and the first alignment layer is made of a light-operated alignment material; the light source assembly is arranged on one side of the light-operated liquid crystal layer and is configured to provide incident light for the light-operated liquid crystal layer, the light source assembly comprises a first light source, and the incident light of the first light source has a rewriting effect on the orientation direction of the light-operated orientation material. After the alignment direction of the first alignment layer is rewritten, the normal irradiation light may be used as a light source to be incident on the photo-controlled liquid crystal layer, and since liquid crystal molecules of the first liquid crystal layer of the photo-controlled liquid crystal layer are in a stable deflection state, the first light source may not be rewritten until the first light source is turned on again. Therefore, after the common irradiating light passes through the light-controlled liquid crystal layer, stable display under a low refresh rate can be realized.)

1. A display panel, comprising:

a light control liquid crystal layer including a first liquid crystal layer, a first alignment layer disposed at one side of the first liquid crystal layer, and a second alignment layer disposed at the other side of the first liquid crystal layer, the first alignment layer being made of a light control alignment material;

the light source assembly is arranged on one side of the light-operated liquid crystal layer and is configured to provide incident light to the light-operated liquid crystal layer, the incident light is polarized light, the light source assembly comprises a first light source, and the incident light provided by the first light source has a rewriting effect on the orientation direction of the light-operated orientation material.

2. The display panel according to claim 1, wherein the first light source is an ultraviolet light source.

3. The display panel of claim 1, further comprising an electrically controlled liquid crystal layer including a second liquid crystal layer and a first electrode assembly for applying an electric field to the second liquid crystal layer to control liquid crystal molecule deflection of the second liquid crystal layer; the light source assembly is positioned on one side of the first orientation layer far away from the first liquid crystal layer.

4. The display panel of claim 3, wherein the light source assembly further comprises a first polarizer disposed between the electrically controlled liquid crystal layer and the first light source.

5. The display panel according to claim 4, further comprising a second polarizer disposed on a side of the first liquid crystal layer remote from the first alignment layer, wherein a transmission axis of the first polarizer and a transmission axis of the second polarizer are in a spatially perpendicular relationship.

6. The display panel according to claim 3, wherein the electrically controlled liquid crystal layer further comprises a third alignment layer disposed on one side of the second liquid crystal layer and a fourth alignment layer disposed on the other side of the second liquid crystal layer.

7. The display panel according to claim 3, wherein the first electrode assembly comprises a common electrode and a pixel electrode, the display panel further comprises a thin film transistor connected to the pixel electrode, the thin film transistor comprises a gate electrode, a first electrode, a second electrode, and an active layer, and the pixel electrode is connected to the first electrode or the second electrode.

8. The display panel of claim 1, further comprising a plurality of color resistance units disposed on a side of the optically controlled liquid crystal layer away from the light source assembly, each of the color resistance units comprising a first color resistance, a second color resistance, and a third color resistance.

9. The display panel of claim 1, wherein the light source assembly further comprises a second light source that is a non-ultraviolet light source, the second light source and the first light source being on a same side of the light-controlled liquid crystal layer.

10. The display panel according to any one of claims 1 to 9, further comprising a transflective film disposed between the light-controlling liquid crystal layer and the light source assembly.

11. The panel of claim 1 wherein the optically controlled liquid crystal layer further comprises a second electrode assembly for applying an electric field to the first liquid crystal layer to control liquid crystal molecule deflection of the first liquid crystal layer.

12. The display panel of claim 11, wherein the light source assembly further comprises a third polarizer disposed between the first light source and the light-controlled liquid crystal layer.

13. The display panel of claim 11, further comprising a light reflecting layer, wherein the light reflecting layer and the light source module are respectively located at two opposite sides of the light-controlled liquid crystal layer, and the light reflecting layer is located at a side of the first alignment layer away from the first liquid crystal layer.

14. The display panel according to claim 11, wherein the second electrode assembly includes a common electrode and a pixel electrode, the display panel further comprises a thin film transistor connected to the pixel electrode, the thin film transistor includes a gate electrode, a first electrode, a second electrode, and an active layer, and the pixel electrode is connected to the first electrode or the second electrode.

15. The display panel of claim 13, further comprising a plurality of color resistance units disposed on a side of the light-controlled liquid crystal layer remote from the light-reflecting layer, each of the color resistance units comprising a first color resistance, a second color resistance, and a third color resistance.

16. The display panel of claim 12, wherein the light source assembly further comprises a second light source that is a non-ultraviolet light source, the second light source and the first light source being on a same side of the light-controlled liquid crystal layer.

17. A display device characterized by comprising the display panel according to any one of claims 1 to 16.

18. A display driving method for driving the display panel according to any one of claims 1 to 16, the method comprising:

turning on a first light source, and rewriting the orientation direction of a first orientation layer by using incident light provided by the first light source so as to deflect liquid crystal molecules in the first liquid crystal layer according to an expected deflection direction;

the first light source is turned off.

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel, a display device, and a display driving method.

Background

At present, an EPD (microcapsule electrophoretic display) technology is mainly adopted for electronic paper products, and low refresh rate, stable state display, reflective display and the like can be realized. However, there are limitations such as low contrast, excessively slow refresh rate, and difficulty in color display. Through continuous development of the traditional liquid crystal display technology, applications such as high/low refresh rate switching, reflective display and the like can be theoretically realized, but the applications are still difficult to realize for ultralow refresh rate, stable state display and the like due to factors such as electric leakage and the like. Therefore, the liquid crystal display technology cannot be applied to electronic paper products.

Disclosure of Invention

An object of the embodiments of the present application is to provide a display panel, a display device, and a display driving method, which can implement ultra-low refresh rate and stable display by applying a liquid crystal display technology, and can be better applied to electronic paper products. The specific technical scheme is as follows:

an embodiment of an aspect of the present application provides a display panel, including:

a light control liquid crystal layer including a first liquid crystal layer, a first alignment layer disposed at one side of the first liquid crystal layer, and a second alignment layer disposed at the other side of the first liquid crystal layer, the first alignment layer being made of a light control alignment material;

the light source assembly is arranged on one side of the light-operated liquid crystal layer and is configured to provide incident light to the light-operated liquid crystal layer, the incident light is polarized light, the light source assembly comprises a first light source, and the incident light provided by the first light source has a rewriting effect on the orientation direction of the light-operated orientation material.

In some embodiments of the present application, the first light source is an ultraviolet light source.

In some embodiments of the present application, the display panel further comprises an electrically controlled liquid crystal layer comprising a second liquid crystal layer, and a first electrode assembly for applying an electric field to the second liquid crystal layer to control liquid crystal molecule deflection of the second liquid crystal layer; the light source assembly is positioned on one side of the first orientation layer far away from the first liquid crystal layer.

In some embodiments of the present application, the light source module further includes a first polarizer disposed between the electrically controlled liquid crystal layer and the first light source.

In some embodiments of the present application, the display panel further includes a second polarizer, the second polarizer is disposed on one side of the first liquid crystal layer away from the first alignment layer, and the transmission axis of the first polarizer and the transmission axis of the second polarizer are in a spatial vertical relationship.

In some embodiments of the present application, the electrically controlled liquid crystal layer further comprises a third alignment layer disposed on one side of the second liquid crystal layer and a fourth alignment layer disposed on the other side of the second liquid crystal layer.

In some embodiments of the present application, the first electrode assembly includes a common electrode and a pixel electrode, the display panel further includes a thin film transistor connected to the pixel electrode, the thin film transistor includes a gate electrode, a first pole, a second pole, and an active layer, and the pixel electrode is connected to the first pole or the second pole.

In some embodiments of the present application, the display panel further includes a plurality of color resistance units disposed on a side of the light-controlled liquid crystal layer away from the light source assembly, and each of the color resistance units includes a first color resistance, a second color resistance, and a third color resistance.

In some embodiments of the present application, the light source assembly further comprises a second light source, the second light source being a non-ultraviolet light source, the second light source and the first light source being located on the same side of the light-controlled liquid crystal layer.

In some embodiments of the present application, the display panel further includes a semi-transparent and semi-reflective coating film disposed between the light control liquid crystal layer and the light source assembly.

In some embodiments of the present application, the light controlled liquid crystal layer further comprises a second electrode assembly for applying an electric field to the first liquid crystal layer to control liquid crystal molecule deflection of the first liquid crystal layer.

In some embodiments of the present application, the light source assembly further includes a third polarizer disposed between the first light source and the light-controlling liquid crystal layer.

In some embodiments of the present application, the display panel further includes a light reflecting layer, the light reflecting layer and the light source assembly are respectively located at two opposite sides of the light-controlled liquid crystal layer, and the light reflecting layer is located at a side of the first alignment layer away from the first liquid crystal layer.

In some embodiments of the present application, the second electrode assembly includes a common electrode and a pixel electrode, the display panel further includes a thin film transistor connected to the pixel electrode, the thin film transistor includes a gate electrode, a first electrode, a second electrode, and an active layer, and the pixel electrode is connected to the first electrode or the second electrode.

In some embodiments of the present application, the display panel further includes a plurality of color resistance units disposed on a side of the light-controlled liquid crystal layer away from the light reflection layer, each of the color resistance units including a first color resistance, a second color resistance, and a third color resistance.

In some embodiments of the present application, the light source assembly further comprises a second light source, the second light source being a non-ultraviolet light source, the second light source and the first light source being located on the same side of the light-controlled liquid crystal layer.

An embodiment of another aspect of the present application provides a display device, including the display panel in any of the above embodiments.

An embodiment of a further aspect of the present application proposes a display driving method for driving the display panel in the above embodiment of the first aspect, the method including:

turning on a first light source, and rewriting the orientation direction of a first orientation layer by using incident light provided by the first light source so as to deflect liquid crystal molecules in the first liquid crystal layer according to an expected deflection direction;

the first light source is turned off.

The embodiment of the application has the following beneficial effects:

the embodiment of the application provides a display panel, a display device and a display driving method. The display panel comprises a light-operated liquid crystal layer and a light source assembly, wherein a first alignment layer in the light-operated liquid crystal layer is made of a light-operated alignment material, the light source assembly comprises a first light source, and incident light provided by the first light source can rewrite the alignment direction of the light-operated alignment material, so that the deflection direction of liquid crystal molecules in the first liquid crystal layer is changed. The display panel in the embodiment of the application can realize steady-state display under an ultralow refresh rate. Specifically, the first light source is first turned on, and incident light supplied from the first light source irradiates the first alignment layer, thereby rewriting the alignment direction of the first alignment layer and deflecting the liquid crystal molecules in the first liquid crystal layer in a desired deflection direction. After the alignment direction of the first alignment layer is rewritten, the first light source is turned off, and at this time, the alignment direction of the first alignment layer is not changed and the liquid crystal molecules in the first liquid crystal layer maintain their deflection directions. Then, common irradiation light (which has no regulation and control function on the light-control orientation material) can be used as a light source, so that the common irradiation light enters the light-control liquid crystal layer, and the common irradiation light is subjected to polarization state modulation by the light-control liquid crystal layer in the process of passing through the light-control liquid crystal layer, so that the display panel displays according to an expected display mode. Since the liquid crystal molecules of the first liquid crystal layer of the light-controlled liquid crystal layer are in a stable deflected state, they are not overwritten until the first light source is turned on again. Therefore, after the common irradiating light passes through the light-controlled liquid crystal layer, stable display under a low refresh rate can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be 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 application, and it is also obvious for a person skilled in the art to obtain other embodiments according to the drawings.

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application;

fig. 2 is a schematic perspective view of a display panel according to an embodiment of the present disclosure (an arrow in the figure illustrates a process of rewriting a photo-controlled liquid crystal layer after ultraviolet light enters the display panel);

fig. 3 is a schematic perspective view of a display panel according to an embodiment of the present disclosure (an arrow in the drawing illustrates a process of displaying a dark state after a common illumination light is incident on the display panel);

fig. 4 is a schematic perspective view of a display panel according to an embodiment of the present disclosure (an arrow in the figure illustrates a process of displaying a bright state after a normal illumination light is incident on the display panel);

fig. 5 is a schematic perspective view of a display panel according to an embodiment of the present disclosure (an arrow in the figure illustrates a process of displaying a display panel in a steady state after a normal illumination light is incident on the display panel);

fig. 6 is a schematic perspective view of a display panel according to an embodiment of the present disclosure (a semi-transparent and semi-reflective coating is disposed on a second substrate, and arrows in the figure indicate a process of rewriting the light-controlled liquid crystal layer by ultraviolet light and a reflection process of ambient incident light after the incident light enters the panel);

FIG. 7 is a schematic diagram of an electrode assembly and a thin film transistor in a display panel according to an embodiment of the present disclosure;

fig. 8 is a schematic perspective view of a display panel according to another embodiment of the present disclosure (a light reflective layer is disposed on the first substrate, and arrows in the figure indicate a process of rewriting the light-controlled liquid crystal layer by ultraviolet light and a process of reflecting ambient incident light after the incident light enters the panel);

fig. 9 is a schematic structural diagram of an electrode assembly and a thin film transistor in a display panel according to another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the description herein are intended to be within the scope of the present disclosure.

As shown in fig. 1 and fig. 2, an embodiment of a first aspect of the present application provides a display panel. The display panel includes a light-controlled liquid crystal layer 100 and a light source assembly. Specifically, the light control liquid crystal layer 100 includes a first liquid crystal layer 110, a first alignment layer 120 disposed at one side of the first liquid crystal layer 110, and a second alignment layer 130 disposed at the other side of the first liquid crystal layer 110, the first alignment layer 120 being made of a light control alignment material. The light source assembly is disposed at one side of the light-controlled liquid crystal layer 100, and is configured to provide incident light to the light-controlled liquid crystal layer 100, the incident light being polarized light, and the light source assembly includes a first light source 210, and the incident light provided by the first light source 210 has a rewriting effect on an alignment direction of the light-controlled alignment material.

The display panel according to the embodiment of the present application includes a light-controlled liquid crystal layer 100 and a light source assembly, wherein the first alignment layer 120 in the light-controlled liquid crystal layer 100 is made of a light-controlled alignment material, the light source assembly includes a first light source 210, and an alignment direction of the light-controlled alignment material can be rewritten by incident light provided by the first light source 210, so as to change a deflection direction of liquid crystal molecules in the first liquid crystal layer 110. The display panel in the embodiment of the application can realize steady-state display under an ultralow refresh rate. Specifically, the first light source 210 is first turned on, and the first alignment layer 120 is irradiated with incident light supplied from the first light source 210, so that the alignment direction of the first alignment layer 120 is rewritten, and the liquid crystal molecules in the first liquid crystal layer 110 are deflected in a desired deflection direction. After the alignment direction of the first alignment layer 120 is rewritten, the first light source 210 is turned off, and at this time, the alignment direction of the first alignment layer 120 is not changed and the liquid crystal molecules in the first liquid crystal layer 110 maintain their deflection directions. Then, common irradiation light (having no control function on the photo-alignment material) can be used as a light source, so that the common irradiation light enters the photo-controlled liquid crystal layer 100, and the common irradiation light is subjected to polarization state modulation by the photo-controlled liquid crystal layer 100 in the process of passing through the photo-controlled liquid crystal layer 100, so that the display panel displays according to an expected display mode. Since the liquid crystal molecules of the first liquid crystal layer 110 of the light control liquid crystal layer 100 are in a stable deflected state, they are not rewritten until the first light source 210 is turned on again. Therefore, the normally irradiated light can realize a stable display at a low refresh rate after passing through the light-controlled liquid crystal layer 100.

In some embodiments of the present application, the first light source 210 is an ultraviolet light source that is used to control the orientation direction of the photoalignment material. In the present embodiment, the material of the photoalignment layer may be, for example, a rewritable azo dye SD1, in the related art, the alignment method of the azo dye photoalignment layer is to irradiate the azo dye photoalignment layer with a beam of polarized ultraviolet light, the photoalignment layer is correspondingly formed with an alignment direction perpendicular to the polarization direction of the ultraviolet light, and the material is repeatedly irradiated to change different alignment directions. Therefore, in the embodiment of the present application, an ultraviolet light source may be used as the first light source 210 to rewrite the alignment direction of the first alignment layer 120, thereby deflecting the liquid crystal molecules in the first liquid crystal layer 110 in a desired deflection direction.

In some embodiments of the present application, the display panel further includes an electrically controlled liquid crystal layer 300 and a first electrode assembly 400 (refer to fig. 7), the electrically controlled liquid crystal layer 300 includes a second liquid crystal layer 310, and the first electrode assembly 400 is used for applying an electric field to the second liquid crystal layer 310 to control liquid crystal molecule deflection of the second liquid crystal layer 310. The light source assembly is positioned at a side of the first alignment layer 120 away from the first liquid crystal layer 110. In the present embodiment, the display panel further includes an electrically controlled liquid crystal layer 300 and a first electrode assembly 400, wherein the first electrode assembly 400 can control a liquid crystal molecule deflection angle in a second liquid crystal layer 310 of the electrically controlled liquid crystal layer 300. The electrically controllable liquid crystal layer 300 may be used to modulate the polarization state of incident light provided by the power supply components. For example, after the first light source 210 is turned on, the incident light provided by the first light source 210 is first modulated by the electrically controlled liquid crystal layer 300, and the modulated incident light irradiates the first alignment layer 120 to rewrite the alignment direction of the first alignment layer 120. Thus, the polarization state of the incident light provided by the first light source 210 can be changed by the electrically controlled liquid crystal layer 300, and the orientation direction of the first orientation layer 120 is changed to a desired orientation direction by the rewriting effect of the incident light on the first orientation layer 120.

Further, the display panel further includes a first substrate 1100, a second substrate 1200 and a third substrate 1300, wherein the first substrate 1100 is located on a side of the electrically controlled liquid crystal layer 300 away from the optically controlled liquid crystal layer 100, the second substrate 1200 is located between the electrically controlled liquid crystal layer 300 and the optically controlled liquid crystal layer 100, and the third substrate 1300 is located on a side of the optically controlled liquid crystal layer 100 away from the electrically controlled liquid crystal layer 300.

In some embodiments of the present application, the light source module further includes a first polarizer 230, and the first polarizer 230 is disposed between the electrically controlled liquid crystal layer 300 and the first light source 210. The first polarizer 230 is used to make incident light provided by the light source module form linearly polarized light, and when the linearly polarized light passes through the electrically controlled liquid crystal layer 300, the electrically controlled liquid crystal layer 300 can modulate the polarization state of the linearly polarized light.

Further, the display panel further includes a second polarizer 900, the second polarizer 900 is disposed on a side of the first liquid crystal layer 110 away from the first alignment layer 120, and a transmission axis of the first polarizer 230 and a transmission axis of the second polarizer 900 are in a spatial perpendicular relationship. In this embodiment, the display panel can be switched between the bright display mode and the dark display mode by the cooperation of the electrically controlled liquid crystal layer 300, the optically controlled liquid crystal layer 100, the first polarizer 230 and the second polarizer 900. The following examples illustrate:

in a specific example, the alignment direction of the first alignment layer 120 is first rewritten by the first light source 210, and the rewritten first liquid crystal layer 110 is configured so as to "not change the polarization state of the polarized light passing through the light-controlled liquid crystal layer 100", and then the first light source 210 is turned off and the normal irradiation light is turned on. For ease of understanding, the description will be given taking white light as an example of the ordinary illumination light, and it is assumed that the white light is generated by a backlight light source (in fig. 3, the second light source 250 may be considered to provide the ordinary illumination light). As shown in fig. 3, when the voltage across the first electrode assembly 400 is less than the deflection threshold voltage, the liquid crystal molecules in the second liquid crystal layer 310 are not deflected, and thus, the polarization state of linearly polarized light passing through the first polarizing plate 230 is not changed after passing through the second liquid crystal layer 310, and the polarization state is not changed after passing through the first liquid crystal layer 110. Finally, the polarization direction of the polarized light passing through the first liquid crystal layer 110 is perpendicular to the transmission axis of the second polarizer 900, and thus the polarized light cannot pass through the second polarizer 900, and at this time, the display panel has a dark-state display effect. As shown in fig. 4, when the voltage applied to the first electrode assembly 400 is greater than the deflection threshold voltage, the liquid crystal molecules in the second liquid crystal layer 310 are deflected, and thus, the polarization state is rotated by 90 ° after the linear polarization passing through the first polarizer 230 passes through the second liquid crystal layer 310, and then is not changed after passing through the first liquid crystal layer 110. Finally, the polarization direction of the polarized light passing through the first liquid crystal layer 110 is consistent with the transmission axis of the second polarizer 900, so that the polarized light is emitted through the second polarizer 900, and at this time, the display panel has a bright display effect.

In another specific example, the first light source 210 is used to rewrite the orientation direction of the first orientation layer 120, and the rewritten first liquid crystal layer 110 is configured to "change the polarization state of the polarized light passing through the light-controlled liquid crystal layer 100", and then the first light source 210 is turned off, and the normal illumination light is turned on (still taking the backlight light source as an example). As shown in fig. 5 (in fig. 5, it can be considered that the second light source 250 provides the general illumination light), when the voltage on the first electrode assembly 400 is less than the deflection threshold voltage, the liquid crystal molecules in the second liquid crystal layer 310 are not deflected, the polarization state of the linearly polarized light passing through the first polarizing plate 230 is not changed after passing through the second liquid crystal layer 310, and then the polarization state is changed after passing through the first liquid crystal layer 110. According to the different change degrees of the polarization state of the first liquid crystal layer 110, different steady-state display effects such as light transmission, partial penetration and the like can be finally achieved. For example, when the first liquid crystal layer 110 is configured to "deflect the polarization state of polarized light passing through the light-controlled liquid crystal layer 100 by 90 °, the display panel exhibits a steady-state display effect of light transmission. When the first liquid crystal layer 110 is configured to "deflect the polarization state of polarized light passing through the light-controlled liquid crystal layer 100 by N °, and N < 90 or 90 < N < 180", the display panel exhibits a steady-state display effect in which light is partially transmitted.

In some embodiments of the present application, the electrically controlled liquid crystal layer 300 further includes a third alignment layer 320 disposed on one side of the second liquid crystal layer 310 and a fourth alignment layer 330 disposed on the other side of the second liquid crystal layer 310. In the present embodiment, the liquid crystal molecules of the second liquid crystal layer 310 can be aligned by providing the third alignment layer 320 and the fourth alignment layer 330, so that the liquid crystal molecules of the second liquid crystal layer 310 can be aligned in a desired alignment direction.

In some embodiments of the present application, as shown in fig. 7, the first electrode assembly 400 includes a common electrode 410 and a pixel electrode 420, the display panel further includes a thin film transistor 600 connected to the pixel electrode, the thin film transistor 600 includes a gate electrode 610, a first electrode 620, a second electrode 630, and an active layer 640, and the pixel electrode 420 is connected to the first electrode 620 or the second electrode 630. Wherein the first pole 620 is one of a source and a drain and the second pole 630 is the other of the source and the drain. The common electrode 410 may be disposed opposite the pixel electrode 420. In this embodiment, the thin film transistor 600, the pixel electrode 420 and the common electrode 410 can control the electrically controlled liquid crystal layer 300 at a pixel level, so that the electrically controlled liquid crystal layer 300 can modulate the light provided by the first light source 210 at a pixel level, and the adjusted light can control the deflection direction of the liquid crystal molecules of the optically controlled liquid crystal layer 100, and thus, the control of the optically controlled liquid crystal layer 100 in the embodiment of the present application is also at a pixel level.

Further, the display panel further includes a gate insulating layer 1500, a first interlayer insulating layer 1600, and a second interlayer insulating layer 1700, wherein the gate insulating layer 1500 is disposed between the gate 610 and the active layer 640, the first interlayer insulating layer 1600 is disposed between the active layer 640 and the first and second poles 620, 630, and the second interlayer insulating layer 1700 is disposed between the first interlayer insulating layer 1600 and the pixel electrode 420.

In some embodiments of the present application, the display panel further includes a plurality of color resistance units (not shown in the figure) disposed on a side of the light-controlled liquid crystal layer 100 away from the light source assembly, and each color resistance unit includes a first color resistance, a second color resistance and a third color resistance. Thus, when the ordinary irradiation light exits from the light-controlled liquid crystal layer 100, different colors can be displayed by the color resistances of different colors, and thus, the display panel can realize stable color display by providing the color resistance unit.

In some embodiments of the present application, the light source assembly further comprises a second light source 250, the second light source 250 being a non-ultraviolet light source, the second light source 250 and the first light source 210 being located on the same side of the optically controlled liquid crystal layer 100. The second light source 250 is used to provide general irradiation light, i.e., light having no overwriting effect on the first alignment layer 120. After the orientation direction of the first orientation layer 120 is rewritten by the ultraviolet light provided by the first light source 210, the first light source 210 is turned off, then the second light source 250 is turned on, and the light irradiated by the second light source 250 is subjected to polarization state modulation by the optically controlled liquid crystal layer 100 in the process of passing through the optically controlled liquid crystal layer 100, so that the display panel displays according to the expected display mode. For example, the second light source 250 may be a backlight light source for providing white light.

In some embodiments of the present application, the display panel further includes a semi-transparent and semi-reflective film 500 disposed between the light control liquid crystal layer 100 and the light source assembly. In this case, the transflective film 500 may reflect the ambient incident light 1410 to provide a steady display effect. Specifically, as shown in fig. 6, the first light source 210 is turned on first, and the alignment direction of the first alignment layer 120 is rewritten by the incident light provided by the first light source 210 (or the alignment direction of the first alignment layer 120 may be rewritten after being modulated by the electrically controlled liquid crystal layer 300), so that the liquid crystal molecules in the first liquid crystal layer 110 are deflected in the desired deflection direction. Then, the first light source 210 is turned off. At this time, ambient incident light 1410 reaches the transflective film 500 after being modulated by the light-controlled liquid crystal layer 100, and is reflected by the transflective film 500 to form emergent light 1420. This causes reflection of ambient incident light 1410, thereby producing a steady-state display effect.

As shown in fig. 8 and 9, an embodiment of the second aspect of the present application proposes a display panel including a light-controlled liquid crystal layer 100 and a light source assembly. The photo-alignment liquid crystal layer 100 includes a first liquid crystal layer 110, a first alignment layer 120 disposed at one side of the first liquid crystal layer 110, and a second alignment layer 130 disposed at the other side of the first liquid crystal layer 110, the first alignment layer 120 being made of a photo-alignment material. The light source assembly is disposed at one side of the light-controlled liquid crystal layer 100, and is configured to provide incident light to the light-controlled liquid crystal layer 100, the incident light being polarized light, and the light source assembly includes a first light source 210, and the incident light provided by the first light source 210 has a rewriting effect on an alignment direction of the light-controlled alignment material. The optically controlled liquid crystal layer 100 further includes a second electrode assembly 700, the second electrode assembly 700 being adapted to apply an electric field to the first liquid crystal layer 110 to control the liquid crystal molecules of the first liquid crystal layer 110 to deflect.

The display panel according to the embodiment of the present application includes a light-controlled liquid crystal layer 100 and a light source assembly, wherein the first alignment layer 120 in the light-controlled liquid crystal layer 100 is made of a light-controlled alignment material, the light source assembly includes a first light source 210, and an alignment direction of the light-controlled alignment material can be rewritten by incident light provided by the first light source 210, so as to change a deflection direction of liquid crystal molecules in the first liquid crystal layer 110. The display panel in the embodiment of the application can realize steady-state display under an ultralow refresh rate. Specifically, the first light source 210 is first turned on, and the first alignment layer 120 is irradiated with incident light supplied from the first light source 210, so that the alignment direction of the first alignment layer 120 is rewritten, and the liquid crystal molecules in the first liquid crystal layer 110 are deflected in a desired deflection direction. After the alignment direction of the first alignment layer 120 is rewritten, the first light source 210 is turned off, and at this time, the alignment direction of the first alignment layer 120 is not changed and the liquid crystal molecules in the first liquid crystal layer 110 maintain their deflection directions. Then, common irradiation light (having no control function on the photo-alignment material) can be used as a light source, so that the common irradiation light enters the photo-controlled liquid crystal layer 100, and the common irradiation light is subjected to polarization state modulation by the photo-controlled liquid crystal layer 100 in the process of passing through the photo-controlled liquid crystal layer 100, so that the display panel displays according to an expected display mode. Since the liquid crystal molecules of the first liquid crystal layer 110 of the light control liquid crystal layer 100 are in a stable deflected state, they are not rewritten until the first light source 210 is turned on again. Therefore, the normally irradiated light can realize a stable display at a low refresh rate after passing through the light-controlled liquid crystal layer 100.

In addition, in the display panel of the present embodiment, the second electrode assembly 700 may directly control the liquid crystal molecule deflection of the first liquid crystal layer 110 in the optically controlled liquid crystal layer 100, so as to perform polarization state modulation on the incident light provided by the power supply assembly, without additionally providing the electrically controlled liquid crystal layer 300. For example, after the first light source 210 is turned on, incident light supplied from the first light source 210 is modulated by the first liquid crystal layer 110, and the modulated incident light irradiates the first alignment layer 120 to rewrite the alignment direction of the first alignment layer 120. Thus, the polarization state of the incident light provided by the first light source 210 can be changed by the modulation of the first liquid crystal layer 110, and the orientation direction of the first orientation layer 120 can be changed to a desired orientation direction by the rewriting effect of the incident light on the first orientation layer 120.

In some embodiments of the present application, the light source module may further include a third polarizer 260, and the third polarizer 260 is disposed between the first light source 210 and the light control liquid crystal layer 100. The third polarization plate 260 is used to polarize incident light provided by the light source module or ambient incident light.

In some embodiments of the present disclosure, the display panel further includes a light reflecting layer 800, the light reflecting layer 800 and the light source module are respectively disposed on two opposite sides of the optically controlled liquid crystal layer 100, and the light reflecting layer 800 is disposed on a side of the first alignment layer 120 away from the first liquid crystal layer 110. In this embodiment, after the first light source 210 is turned on, incident light provided from the first light source 210 is modulated by the first liquid crystal layer 110, and the modulated incident light irradiates the first alignment layer 120 to rewrite the alignment direction of the first alignment layer 120. The first light source 210 is then turned off. At this time, ambient incident light from the outside reaches the light reflecting layer 800 after being modulated by the first liquid crystal layer 110, and forms emergent light after being reflected by the light reflecting layer 800. This provides an effect of stable display by reflection of ambient incident light.

Further, the display panel further includes a first substrate 1100 and a second substrate 1200, wherein the first substrate 1100 and the second substrate 1200 are divided to be located at two sides of the light control liquid crystal layer 100, and the second substrate 1200 is located at a side of the light control liquid crystal layer 100 away from the light reflection layer 800. In addition, the light reflecting layer 800 may be disposed on the first substrate 1100.

In some embodiments of the present application, the second electrode assembly 700 may include a common electrode 710 and a pixel electrode 720, the display panel further includes a thin film transistor 600 connected to the pixel electrode, the thin film transistor 600 includes a gate electrode 610, a first pole 620, a second pole 630, and an active layer 640, and the pixel electrode 720 is connected to the first pole 620 or the second pole 630. Wherein the first pole 620 is one of a source and a drain and the second pole 630 is the other of the source and the drain. The common electrode 710 may be disposed opposite the pixel electrode 720. In this embodiment, the thin film transistor 600, the pixel electrode 720, and the common electrode 710 can control the first liquid crystal layer 110 at a pixel level, so that the first liquid crystal layer 110 can modulate incident light to the first light source 210 at a pixel level, and the adjusted incident light can rewrite the alignment direction of the first alignment layer 120, and therefore, the control of the alignment direction of the first alignment layer 120 in the embodiment of the present invention is also control at a pixel level.

Further, the display panel further includes a gate insulating layer 1500, a first interlayer insulating layer 1600, and a second interlayer insulating layer 1700, wherein the gate insulating layer 1500 is disposed between the gate 610 and the active layer 640, the first interlayer insulating layer 1600 is disposed between the active layer 640 and the first and second poles 620, 630, and the second interlayer insulating layer 1700 is disposed between the first interlayer insulating layer 1600 and the pixel electrode 420.

In some embodiments of the present application, the display panel further includes a plurality of color resistance units (not shown) disposed on a side of the light control liquid crystal layer 100 away from the light reflection layer, each color resistance unit including a first color resistance, a second color resistance, and a third color resistance. Thus, when the ordinary irradiation light exits from the light-controlled liquid crystal layer 100, different colors can be displayed by the color resistances of different colors, and thus, the display panel can realize stable color display by providing the color resistance unit.

In some embodiments of the present application, the light source assembly further comprises a second light source 250, the second light source 250 being a non-ultraviolet light source, the second light source 250 and the first light source 210 being located on the same side of the optically controlled liquid crystal layer 100. The second light source 250 is used to provide general irradiation light, i.e., light having no overwriting effect on the first alignment layer 120. After the orientation direction of the first orientation layer 120 is rewritten by the ultraviolet light provided by the first light source 210, the first light source 210 is turned off, then the second light source 250 is turned on, and the light irradiated by the second light source 250 is subjected to polarization state modulation by the optically controlled liquid crystal layer 100 in the process of passing through the optically controlled liquid crystal layer 100, so that the display panel displays according to the expected display mode.

Embodiments of a third aspect of the present application propose a display device comprising the display panel of the above-described first aspect embodiment or the display panel of the above-described second aspect embodiment.

The display device in the embodiment of the present application is based on the same inventive concept as the display panel in the embodiment of the first aspect or the display panel in the embodiment of the second aspect. Therefore, all the advantageous effects possessed by the display panel in the above-described first aspect embodiment or the display panel in the above-described second aspect embodiment can be obtained.

An embodiment of a fourth aspect of the present application proposes a display driving method, for the display panel in the embodiment of the first aspect or the display panel in the embodiment of the second aspect, the display driving method including:

turning on the first light source 210, and rewriting the alignment direction of the first alignment layer 120 using incident light provided from the first light source 210 to deflect the liquid crystal molecules in the first liquid crystal layer 110 in a desired deflection direction;

the first light source 210 is turned off.

According to the display driving method of the embodiment of the present application, the alignment direction of the first alignment layer 120 can be rewritten, and the liquid crystal molecules in the first liquid crystal layer 110 can be deflected in a desired deflection direction. After the first light source 210 is turned off, the alignment direction of the first alignment layer 120 is not changed, and the liquid crystal molecules in the first liquid crystal layer 110 maintain their deflection directions. Then, the steady state display at a low refresh rate can be realized by using ordinary irradiation light or ambient incident light.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only for the preferred embodiment of the present application and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application are included in the protection scope of the present application.