WO2020258524A1 - Array substrate and liquid crystal display device - Google Patents

Abstract

An array substrate and a liquid crystal display device. The array substrate (10) comprises a heating electrode layer (103) formed on a drive circuit layer (101); liquid crystal heating can be achieved on the basis of the heating electrode layer (103), thereby improving the liquid crystal response speed; in addition, the heating electrode layer (103) is provided on the drive circuit layer (101) and is located in a reflective region (RA), so that all the liquid crystals can be heated uniformly, without affecting normal display of the liquid crystal display device.

Description

Array substrate and liquid crystal display device Technical field

This application relates to the field of display technology, and in particular to an array substrate and a liquid crystal display device.

Background technique

In the low temperature state, the viscosity coefficient of the liquid crystal will increase sharply. In this way, for the liquid crystal display device, after the power is turned on, the response speed of the liquid crystal will slow down, and dynamic smear will occur; when the temperature is lower, for example, lower than -40 The liquid crystal may even crystallize, and the liquid crystal display device cannot display.

That is, the existing liquid crystal display device has a technical problem of poor display in a low temperature state, and needs improvement.

technical problem

The present application provides an array substrate and a liquid crystal display device to alleviate the technical problem of poor display of the existing liquid crystal display device in a low temperature state.

Technical solutions

To solve the above problems, the technical solutions provided by this application are as follows:

An embodiment of the present application provides an array substrate used in a reflective liquid crystal panel, and the array substrate includes:

The driving circuit layer is formed with driving thin film transistors;

A pixel electrode layer, patterned to form a pixel electrode, the pixel electrode includes a metal reflective electrode located in a reflective area; and

The heating electrode layer is formed on the driving circuit layer and is located in the reflection area.

In the array substrate provided by the embodiment of the present application, the reflective liquid crystal panel is a total reflection liquid crystal panel, and the reflective area is the same as the pixel display area.

The array substrate provided by the embodiment of the present application further includes a planarization layer, the heating electrode layer is provided on the driving circuit layer, the planarization layer is provided on the heating electrode layer, and the pixel electrode layer Is arranged on the planarization layer.

In the array substrate provided by the embodiment of the present application, the heating electrode layer is laid flat on the driving circuit layer, and the pixel electrode passes through the planarization layer and the heating electrode layer to communicate with the The source or drain of the driving thin film transistor is connected.

In the array substrate provided by the embodiment of the present application, the heating electrode layer is patterned to form a heating electrode.

In the array substrate provided by the embodiment of the present application, the heating electrode is disposed in the pixel display area.

In the array substrate provided by the embodiment of the present application, the heating electrode is disposed in the pixel display area and the pixel wiring area.

In the array substrate provided by the embodiment of the present application, one heating electrode corresponds to the setting area of one or more metal reflective electrodes.

In the array substrate provided by the embodiment of the present application, the reflective liquid crystal panel is a transflective liquid crystal panel, and the pixel display area includes the reflective area and the transmissive area; the pixel electrode further includes the transmissive area The transparent electrode, the metal reflective electrode of the same sub-pixel and the transparent electrode are connected.

In the array substrate provided by the embodiment of the present application, the heating electrode layer is patterned to form a heating electrode, and the heating electrode is disposed in the reflection area.

In the array substrate provided by the embodiment of the present application, the heating electrode layer is patterned to form a heating electrode, and the heating electrode is disposed in the reflection area and the pixel wiring area.

In the array substrate provided by the embodiment of the present application, the pixel wiring area is used for setting scan lines.

The array substrate provided by the embodiment of the present application further includes a planarization layer, the heating electrode is provided on the driving circuit layer, the planarization layer is provided on the heating electrode, and the metal reflective electrode is provided on On the planarization layer.

In the array substrate provided by the embodiment of the present application, the area of the reflection area is one-half to two-thirds of the area of the transmission area.

In the array substrate provided by the embodiment of the present application, the metal reflective electrode and the heating electrode are arranged on opposite sides of the driving thin film transistor of each sub-pixel.

The embodiment of the present application provides a liquid crystal display device, which includes a reflective liquid crystal panel, a temperature sensor, and a heating control device, wherein:

The reflective liquid crystal panel includes an array substrate and a color filter substrate arranged in a cell, and a liquid crystal located between the array substrate and the color filter substrate, and the array substrate includes the array substrate provided in the embodiment of the present application;

The temperature sensor is used to detect the temperature of the liquid crystal;

The heating control device is connected to the heating electrode layer of the array substrate, and is used for controlling the operation of the heating electrode layer according to the temperature.

In the liquid crystal display device provided by the embodiment of the present application, the temperature sensor is disposed between the array substrate and the color filter substrate.

In the liquid crystal display device provided by the embodiment of the present application, the temperature sensor is arranged on the surface of the reflective liquid crystal panel 40.

In the liquid crystal display device provided by the embodiment of the present application, the heating control device is used to activate the heating electrode layer when the reflective liquid crystal panel is not working, so as to heat the liquid crystal, so that the reflective liquid crystal panel starts to work.

In the liquid crystal display device provided by the embodiment of the present application, the heating control device is used to start the heating electrode layer to work when the reflective liquid crystal panel is not working to heat the liquid crystal until the surface temperature of the reflective liquid crystal panel and the liquid crystal crystal The difference in temperature is greater than a predetermined value.

Beneficial effect

The present application provides an array substrate and a liquid crystal display device. The array substrate includes a driving circuit layer, a driving thin film transistor is formed, a pixel electrode layer, and a pixel electrode is patterned to form a pixel electrode. The pixel electrode includes a metal reflective electrode located in a reflective area, and The heating electrode layer is formed on the driving circuit layer and is located in the reflection area; in this application, based on the heating electrode layer, the liquid crystal can be heated, thereby accelerating the response speed of the liquid crystal, and ensuring the performance of the liquid crystal display device Display effect. At the same time, the heating electrode layer is arranged on the driving circuit layer and is located in the reflective area. While not affecting the normal display of the liquid crystal display device, it can uniformly heat all the liquid crystals without the local temperature of the liquid crystal. The different phenomena alleviate the technical problem of poor display of the existing liquid crystal display device in the low temperature state, and improve the response speed of the liquid crystal display device in the low temperature state.

Description of the drawings

In order to explain the embodiments or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for application. For some embodiments, those of ordinary skill in the art can obtain other drawings based on these drawings without creative work.

FIG. 1 is a schematic diagram of the first structure of an array substrate provided by an embodiment of the application.

FIG. 2 is a schematic diagram of the first arrangement of the heating electrode provided by the embodiment of the application.

FIG. 3 is a schematic diagram of the second arrangement of the heating electrode provided by the embodiment of the application.

FIG. 4 is a schematic diagram of a second structure of the array substrate provided by an embodiment of the application.

FIG. 5 is a schematic diagram of the third arrangement of the heating electrode provided by the embodiment of the application.

Fig. 6 is a schematic diagram of a fourth arrangement of heating electrodes provided by an embodiment of the application.

FIG. 7 is a schematic structural diagram of a liquid crystal display device provided by an embodiment of the application.

Embodiments of the invention

The description of the following embodiments refers to the attached drawings to illustrate specific embodiments that can be implemented in this application. The directional terms mentioned in this application, such as [Up], [Down], [Front], [Back], [Left], [Right], [Inner], [Outer], [Side], etc., are for reference only The direction of the additional schema. Therefore, the directional terms used are used to illustrate and understand the application, rather than to limit the application. In the figure, units with similar structures are indicated by the same reference numerals.

The embodiment of the present application can alleviate the technical problem of poor display of the existing liquid crystal display device in the low temperature state.

In an embodiment, the array substrate provided in the present application is used for a reflective liquid crystal panel. As shown in FIG. 1 or FIG. 4, the array substrate 10 provided in the present application includes:

The driving circuit layer 101 is formed with a driving thin film transistor 11;

The pixel electrode layer 102 is patterned to form a pixel electrode 12, and the pixel electrode 12 includes a metal reflective electrode 121 located in the reflective area RA; and

The heating electrode layer 103 is formed on the driving circuit layer 102 and is located in the reflection area RA.

This embodiment provides an array substrate. The array substrate includes a driving circuit layer, a driving thin film transistor is formed, a pixel electrode layer, and a pixel electrode is patterned to form a pixel electrode. The pixel electrode includes a metal reflective electrode located in a reflective area, and a heating electrode layer , Formed on the driving circuit layer and located in the reflection area; in the present application, based on the heating electrode layer, the liquid crystal can be heated, thereby accelerating the response speed of the liquid crystal and ensuring the display effect of the liquid crystal display device, At the same time, the heating electrode layer is arranged on the driving circuit layer and located in the reflective area, which can uniformly heat all the liquid crystals without affecting the normal display of the liquid crystal display device, without the phenomenon of different temperatures in local areas of the liquid crystals. Therefore, the technical problem of poor display of the existing liquid crystal display device in the low temperature state is alleviated, and the response speed of the liquid crystal display device in the low temperature state is improved.

In an embodiment, the reflective liquid crystal panel is a transflective liquid crystal panel; at this time, as shown in FIG. 1, the pixel display area AA includes the reflective area RA and the transmissive area TA; the pixel electrode 12 also includes a transparent electrode 122 located in the transmission area TA, and the metal reflective electrode 121 and the transparent electrode 122 of the same sub-pixel are connected.

As shown in FIG. 1, the driving circuit layer 101 includes a substrate layer M1, an insulating layer M2 (a collective term for insulating layers in a multi-pass process), a planarization layer M3, and various film layers forming the thin film transistor 11.

The thin film transistor 11 includes an active layer 111, a gate 112, a source 113, a drain 114, etc., and the driving circuit layer 101 is also formed with a scan line 115.

In an embodiment, as shown in FIG. 2, the heating electrode layer 103 is patterned to form a heating electrode 13, and the heating electrode 13 is disposed in the reflection area RA.

In an embodiment, as shown in FIG. 2, the heating electrode layer 103 is patterned to form a heating electrode 13, and the heating electrode 13 is disposed in the reflection area RA and the pixel wiring area ZA.

In an embodiment, the pixel wiring area ZA is mainly used for setting scan lines.

In an embodiment, as shown in FIG. 1, the array substrate 10 further includes a planarization layer 104, the heating electrode 13 is disposed on the driving circuit layer 101, and the planarization layer 104 is disposed on the On the heating electrode 13, the metal reflective electrode 121 is disposed on the planarization layer 104, and the transparent electrode 122 is disposed on the driving circuit layer 101.

The embodiment shown in FIG. 1 can realize heating of each sub-pixel by adding a layer of heating electrode below the reflective metal electrode in the transflective liquid crystal panel.

In an embodiment, the reflective area RA is generally raised by a planarization layer such as OC, and the area of the reflective area RA is generally one-half to two-thirds of the area of the transmissive area TA.

In an embodiment, the material of the metal reflective electrode is generally aluminum or silver, which has a high reflectivity.

In an embodiment, the metal reflective electrode and the transparent electrode are connected together, so the heating electrode is enclosed by the metal reflective electrode, which will not interfere with the liquid crystal in the display area and will not affect the display.

In an embodiment, the metal reflective electrode and the heating electrode are arranged on the opposite side of the driving thin film transistor of each sub-pixel, which may not affect the electrical properties of the driving thin film transistor.

In an embodiment, because the metal reflective electrode is opaque, and the metal traces between adjacent sub-pixels are also not transparent, the heating electrode can use the mask of the metal reflective electrode to achieve the patterned design shown in FIG. 2, or Figure 3 shows a continuous monolithic electrode.

In an embodiment, the material of the heating electrode is preferably silver, but also other metals or transparent materials.

In an embodiment, the reflective liquid crystal panel is a total reflection liquid crystal panel. At this time, as shown in FIG. 4, the reflective area RA is the same as the pixel display area AA.

In an embodiment, as shown in FIG. 4, the array substrate 10 further includes a planarization layer 104, the heating electrode layer 103 is disposed on the driving circuit layer 101, and the planarization layer 104 is disposed on the On the heating electrode layer 103, the pixel electrode layer 102 is disposed on the planarization layer 104.

In an embodiment, the heating electrode layer is laid flat on the driving circuit layer, and the pixel electrode is connected to the driving thin film transistor through a through hole penetrating the planarization layer and the heating electrode layer. Source or drain connection.

In an embodiment, as shown in FIG. 5, the heating electrode layer 103 is patterned to form the heating electrode 13.

In an embodiment, one heating electrode 13 corresponds to the setting area of one or more metal reflective electrodes 121.

In an embodiment, as shown in FIG. 5, the heating electrode 13 is disposed in the pixel display area AA.

In an embodiment, as shown in FIG. 6, the heating electrode 13 is disposed in the pixel display area AA and the pixel wiring area ZA.

The embodiment shown in FIG. 4 provides a configuration of the reflective liquid crystal panel. In the embodiment shown in FIG. 4, the sub-pixels all use metal electrodes on the entire surface, so the heating electrode can cover the area outside the driving thin film transistor.

The heating electrode can use the mask plate corresponding to the metal reflective electrode to realize the patterned design as shown in FIG. 5, or the entire surface coverage as shown in FIG. 6, so there is no need to add a new mask plate.

As shown in FIG. 7, an embodiment of the present application provides a liquid crystal display device 80, which includes a reflective liquid crystal panel 40, a temperature sensor 50, a heating control device 60, and a light source 70, wherein:

The reflective liquid crystal panel 40 includes an array substrate 10 and a color filter substrate 20 arranged in pairs, and a liquid crystal 30 located between the array substrate 10 and the color filter substrate 20;

The light source 70 is arranged on the light incident side of the reflective liquid crystal panel 40;

The temperature sensor 50 is used to detect the temperature of the liquid crystal 30;

The heating control device 60 is connected to the heating electrode layer 103 of the array substrate for controlling the operation of the heating electrode layer 103 according to the temperature.

This embodiment provides a liquid crystal display device, which can improve the heating efficiency inside the panel, increase the overall heating area inside the panel, and increase the uniformity of heating inside the panel.

The liquid crystal display device provided in this embodiment adds heating electrodes inside the panel, so that the liquid crystal display can work better in low-temperature environments, such as vehicle-mounted or special-purpose displays, improve its low-temperature response time, and improve low-temperature picture delay and smear ; Long-term display (liquid crystal has crystallized) placed in extremely low temperature (such as -40 degrees), using the heating device, can quickly start, quickly enter the normal working state.

In an embodiment, the temperature sensor 50 is disposed between the array substrate and the color filter substrate, and can accurately detect the temperature of the liquid crystal.

In an embodiment, as shown in FIG. 7, the temperature sensor 50 is disposed on the surface of the reflective liquid crystal panel 40 to reduce the design difficulty.

In an embodiment, in the liquid crystal display device provided in the embodiment of the present application, the array substrate includes:

The driving circuit layer is formed with driving thin film transistors;

A pixel electrode layer, patterned to form a pixel electrode, the pixel electrode includes a metal reflective electrode located in a reflective area; and

The heating electrode layer is formed on the driving circuit layer and is located in the reflection area.

In an embodiment, in the liquid crystal display device provided in the embodiment of the present application, the reflective liquid crystal panel is a total reflection liquid crystal panel, and the reflective area is the same as the pixel display area.

In an embodiment, in the liquid crystal display device provided in the embodiment of the present application, the array substrate further includes a planarization layer, the heating electrode layer is disposed on the driving circuit layer, and the planarization layer is disposed on the On the heating electrode layer, the pixel electrode layer is arranged on the planarization layer.

In one embodiment, in the liquid crystal display device provided by the embodiment of the present application, the heating electrode layer is laid on the driving circuit layer, and the pixel electrode passes through the planarization layer and the heating electrode. The through hole of the layer is connected to the source or drain of the driving thin film transistor.

In an embodiment, in the liquid crystal display device provided in the embodiment of the present application, the heating electrode layer is patterned to form a heating electrode.

In an embodiment, in the liquid crystal display device provided by the embodiment of the present application, the heating electrode is arranged in the pixel display area, or arranged in the pixel display area and the pixel wiring area.

In an embodiment, in the liquid crystal display device provided by the embodiment of the present application, the reflective liquid crystal panel is a transflective liquid crystal panel, and the pixel display area includes the reflective area and the transmissive area; the pixel electrode It also includes a transparent electrode located in the transmission area, and the metal reflective electrode of the same sub-pixel and the transparent electrode are connected.

In an embodiment, in the liquid crystal display device provided by the embodiment of the present application, the heating electrode layer is patterned to form a heating electrode, and the heating electrode is arranged in the reflective area, or arranged in the reflective area and Pixel routing area.

In an embodiment, in the liquid crystal display device provided by the embodiment of the present application, the array substrate further includes a planarization layer, the heating electrode is disposed on the driving circuit layer, and the planarization layer is disposed on the heating circuit layer. On the electrode, the metal reflective electrode is arranged on the planarization layer.

In one embodiment, the heating control device 60 is used to activate the heating electrode layer to heat the liquid crystal when the reflective liquid crystal panel 40 is not working, so that the reflective liquid crystal panel 40 starts to work.

In an embodiment, when the liquid crystal display device is stored at low temperature for a long time, or the difference between the surface temperature t of the reflective liquid crystal panel 40 and the liquid crystal crystallization temperature th is less than a predetermined value, such as 10 degrees, that is, when t<th +10, the liquid crystal Crystallization occurs, and the reflective liquid crystal panel 40 does not work.

In one embodiment, the heating control device 60 is used to activate the heating electrode layer when the reflective liquid crystal panel 40 is not working to heat the liquid crystal until the surface temperature t of the reflective liquid crystal panel 40 and the liquid crystal The difference of the crystallization temperature th is greater than a predetermined value, for example, 10 degrees, that is, when t>th +10, the reflective liquid crystal panel 40 starts to work.

In one embodiment, the heating control device 60 is used to reduce the heating power of the heating electrode layer when the surface temperature of the reflective liquid crystal panel 40 is greater than the set temperature, and the surface temperature of the reflective liquid crystal panel 40 is less than When the temperature is set, the heating power of the heating electrode layer is increased, so that the reflective liquid crystal panel 40 maintains a high response speed.

In an embodiment, the specific value of the set temperature can be set according to the response time required by the liquid crystal in the low temperature state, and can be determined after testing the corresponding relationship between the response time of the liquid crystal and the temperature in advance.

According to the above embodiment, it can be seen that:

The present application provides an array substrate and a liquid crystal display device. The array substrate includes a driving circuit layer, a driving thin film transistor is formed, a pixel electrode layer, and a pixel electrode is patterned to form a pixel electrode. The pixel electrode includes a metal reflective electrode located in a reflective area, and The heating electrode layer is formed on the driving circuit layer and is located in the reflection area; in this application, based on the heating electrode layer, the liquid crystal can be heated, thereby accelerating the response speed of the liquid crystal, and ensuring the performance of the liquid crystal display device Display effect. At the same time, the heating electrode layer is arranged on the driving circuit layer and is located in the reflective area. While not affecting the normal display of the liquid crystal display device, it can uniformly heat all the liquid crystals without the local temperature of the liquid crystal. The different phenomena alleviate the technical problem of poor display of the existing liquid crystal display device in the low temperature state, and improve the response speed of the liquid crystal display device in the low temperature state.

In summary, although the application has been disclosed as above in preferred embodiments, the above-mentioned preferred embodiments are not intended to limit the application, and those of ordinary skill in the art can make various decisions without departing from the spirit and scope of the application. Such changes and modifications, so the protection scope of this application is subject to the scope defined by the claims.

Claims (20)

An array substrate used in a reflective liquid crystal panel, the array substrate comprising: The driving circuit layer is formed with driving thin film transistors; A pixel electrode layer, patterned to form a pixel electrode, the pixel electrode includes a metal reflective electrode located in a reflective area; and The heating electrode layer is formed on the driving circuit layer and is located in the reflection area. 4. The array substrate according to claim 1, wherein the reflective liquid crystal panel is a total reflection liquid crystal panel, and the reflective area is the same as the pixel display area. The array substrate according to claim 2, further comprising a planarization layer, the heating electrode layer is disposed on the driving circuit layer, the planarization layer is disposed on the heating electrode layer, and the pixel electrode The layer is provided on the planarization layer. The array substrate according to claim 3, wherein the heating electrode layer is laid flat on the driving circuit layer, and the pixel electrode passes through the planarization layer and the heating electrode layer through the through hole, and the The source or drain of the driving thin film transistor is connected. 3. The array substrate of claim 3, wherein the heating electrode layer is patterned to form heating electrodes. The array substrate according to claim 5, wherein the heating electrode is arranged in the pixel display area. 5. The array substrate according to claim 5, wherein the heating electrode is disposed in the pixel display area and the pixel wiring area. 5. The array substrate according to claim 5, wherein one heating electrode corresponds to a setting area of one or more metal reflective electrodes. The array substrate according to claim 1, wherein the reflective liquid crystal panel is a transflective liquid crystal panel, and the pixel display area includes the reflective area and the transmissive area; the pixel electrode further includes the transmissive area The transparent electrode of the same sub-pixel is connected with the metal reflective electrode and the transparent electrode. 9. The array substrate according to claim 9, wherein the heating electrode layer is patterned to form a heating electrode, and the heating electrode is disposed in the reflection area. 9. The array substrate according to claim 9, wherein the heating electrode layer is patterned to form a heating electrode, and the heating electrode is disposed in the reflection area and the pixel wiring area. 9. The array substrate according to claim 9, wherein the pixel wiring area is used for setting scan lines. The array substrate according to claim 9, further comprising a planarization layer, the heating electrode is provided on the driving circuit layer, the planarization layer is provided on the heating electrode, and the metal reflective electrode is provided On the planarization layer. 9. The array substrate according to claim 9, wherein the area of the reflection area is one-half to two-thirds of the area of the transmission area. 9. The array substrate according to claim 9, wherein the metal reflective electrode and the heating electrode are arranged on opposite sides of the driving thin film transistor of each sub-pixel. A liquid crystal display device, which includes a reflective liquid crystal panel, a temperature sensor, and a heating control device, wherein: The reflective liquid crystal panel includes an array substrate and a color filter substrate arranged in pairs, and a liquid crystal located between the array substrate and the color filter substrate, and the array substrate includes the array substrate according to claim 1; The temperature sensor is used to detect the temperature of the liquid crystal; The heating control device is connected to the heating electrode layer of the array substrate, and is used for controlling the operation of the heating electrode layer according to the temperature. 16. The liquid crystal display device of claim 16, wherein the temperature sensor is disposed between the array substrate and the color filter substrate. The liquid crystal display device according to claim 16, wherein the temperature sensor is provided on a surface of a reflective liquid crystal panel. 16. The liquid crystal display device of claim 16, wherein the heating control device is used to activate the heating electrode layer to heat the liquid crystal when the reflective liquid crystal panel is not working, so that the reflective liquid crystal panel starts to operate . 19. The liquid crystal display device according to claim 19, wherein the heating control device is used to start the heating electrode layer to work when the reflective liquid crystal panel is not working to heat the liquid crystal until the surface temperature of the reflective liquid crystal panel is equal The difference in crystallization temperature is greater than a predetermined value.