WO2024093592A1

WO2024093592A1 - Display panel and manufacturing method therefor, display driving method, and storage medium

Info

Publication number: WO2024093592A1
Application number: PCT/CN2023/121890
Authority: WO
Inventors: 胡竞勇; 雷嗣军; 石刚贵; 李轩
Original assignee: 京东方科技集团股份有限公司; 重庆京东方智慧电子系统有限公司
Priority date: 2022-10-31
Filing date: 2023-09-27
Publication date: 2024-05-10
Also published as: CN115857238A

Abstract

A display panel (10) and a manufacturing method therefor, a display driving method, and a storage medium. The display panel (10) comprises: a first substrate (100) and a second substrate (200) in a cellular alignment, wherein at least one of the first substrate (100) and the second substrate (200) is provided with a first electrode (500), at least one of the first substrate (100) and the second substrate (200) is provided with a second electrode (600), the second electrode (600) comprises a plurality of row electrodes (610) and a plurality of column electrodes (620), the row electrodes (610) and the column electrodes (620) are arranged in different layers, the plurality of row electrodes (610) and the plurality of column electrodes (620) intersect each other to define a plurality of intersection points, and one intersection point corresponds to at least one pixel (P); a liquid crystal layer (300) arranged between the first substrate (100) and the second substrate (200), wherein the liquid crystal layer (300) comprises cholesteric liquid crystal molecules; and a driving circuit (400) comprising a plurality of signal transmission components (410), wherein the at least one row electrode (610) and the at least one column electrode (620) are separately connected to the corresponding signal transmission components (410), so that the at least one row electrode (610) and the at least one column electrode (620) can separately apply an electric signal, thereby reducing power consumption and simplifying the process.

Description

Display panel and manufacturing method thereof, display driving method and storage medium

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202211349607.1 filed in China on October 31, 2022, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, a display driving method and a storage medium.

Background technique

Thin film transistor liquid crystal display (TFT-LCD) is a type of liquid crystal display that uses thin film transistor technology to improve image quality. The TFT-LCD panel can be seen as a layer of liquid crystal sandwiched between two glass substrates. The upper glass substrate is a color filter, and the lower glass is equipped with transistors. When the current passes through the transistor, the electric field changes, causing the liquid crystal molecules to deflect, thereby changing the polarity of the light, and then using the polarizer to determine the brightness of the pixel. In addition, because the upper glass is attached to the color filter, each pixel contains three colors: red, blue, and green. These pixels that emit red, blue, and green colors constitute the video screen on the panel.

In the related art, since multiple TFT devices need to be arranged on the array substrate, the TFT-LCD panel requires a large number of mask plates in the manufacturing process, the process is complicated, and it is a passive display mode, requiring a backlight source and continuous power supply to ensure the display effect, which makes the overall power consumption of the display module high.

Summary of the invention

The embodiments of the present disclosure provide a display panel and a manufacturing method thereof, a display driving method and a storage medium, which can reduce power consumption and simplify the process.

The technical solutions provided by the embodiments of the present disclosure are as follows:

A display panel, comprising a display area and a peripheral area, wherein the display area has a plurality of pixels distributed in an array; the display panel comprises:

The first substrate and the second substrate are provided in the box, and at least one of the first substrate and the second substrate A first electrode is disposed on one of the electrodes, and a second electrode is disposed on at least one of the electrodes, wherein the second electrode includes a plurality of row electrodes extending along a first direction and a plurality of column electrodes extending along a second direction intersecting the first direction, wherein the row electrodes and the column electrodes are arranged in different layers, and the plurality of row electrodes and the plurality of column electrodes intersect each other to define a plurality of intersections, and one of the intersections corresponds to at least one of the pixels;

a multistable liquid crystal layer disposed between the first substrate and the second substrate; and

A driving circuit is located in the peripheral area and includes a plurality of signal transmission devices, at least one of the row electrodes and at least one of the column electrodes are separately connected to the corresponding signal transmission devices, so that at least one of the row electrodes and at least one of the column electrodes can be separately applied with electrical signals.

Exemplarily, the multistable liquid crystal layer includes cholesteric liquid crystal molecules.

Exemplarily, the plurality of signal transmission devices include a common signal transmission device, and the first electrode is connected to the common signal transmission device for transmitting a common signal;

The multiple signal transmission devices also include a first pulse signal transmission device and a second pulse signal transmission device. At least one of the row electrodes is correspondingly connected to one of the first pulse signal transmission devices so that a first pulse signal can be applied individually to at least one of the row electrodes; and at least one of the row electrodes is correspondingly connected to one of the second pulse signal transmission devices so that a second pulse signal can be applied individually to at least one of the column electrodes.

Exemplarily, a switch control device is provided between at least one of the row electrodes and the corresponding first pulse signal transmission device, and the switch control device is configured to be turned on when a first predetermined signal is applied, and to be turned off when a second predetermined signal is applied.

Exemplarily, the switch control device includes a source electrode, a drain electrode, and a pattern of an active layer, wherein the source electrode and the drain electrode are provided in the same layer and with the same material as the row electrode and/or the column electrode.

Exemplarily, the first electrode is disposed on the first substrate, and the second electrode is disposed on the second substrate.

Exemplarily, the stacked structure of the first substrate includes: a first substrate, and a first electrode located on a side of the first substrate facing the second substrate;

The laminated structure of the second substrate comprises:

a second substrate;

The driving circuit layer is located on a side of the second substrate facing the first substrate, the driving circuit layer The dynamic circuit layer includes the switch control device;

A first conductive layer located on a side of the driving circuit layer away from the second substrate;

an insulating layer located on a side of the first conductive layer away from the second substrate;

A second conductive layer is located on a side of the insulating layer away from the second substrate, wherein a pattern of one of the first conductive layer and the second conductive layer includes a pattern of the row electrodes, and a pattern of the other includes a pattern of the column electrodes.

A method for manufacturing a display panel, the method comprising:

Manufacturing a first substrate and a second substrate, wherein at least one of the first substrate and the second substrate is provided with a first electrode, and at least one of the first substrate and the second substrate is provided with a second electrode, the first electrode covers the entire surface of the display area, the second electrode includes a plurality of row electrodes extending along a first direction, and a plurality of column electrodes extending along a second direction intersecting the first direction, the row electrodes and the column electrodes are arranged in different layers, a plurality of the row electrodes and a plurality of the column electrodes intersect each other to define a plurality of intersections, and one of the intersections corresponds to at least one of the pixels, and at least one of the first substrate and the second substrate is further provided with a driving circuit, the driving circuit is located in the peripheral area and includes a plurality of signal transmission devices, at least one of the row electrodes and at least one of the column electrodes are respectively and individually connected to the corresponding signal transmission devices, so that at least one of the row electrodes and at least one of the column electrodes can be respectively and individually applied with electrical signals;

The first substrate and the second substrate are assembled into a cell, and a multistable liquid crystal layer is disposed between the first substrate and the second substrate.

Exemplarily, when the first electrode is disposed on the first substrate and the second substrate is disposed on the second substrate, the manufacturing of the first substrate and the second substrate specifically includes:

The steps of manufacturing the second substrate specifically include:

providing a second substrate;

forming a driving circuit layer on the second substrate, wherein the driving circuit layer includes the switch control device;

forming a first conductive layer on a side of the driving circuit layer away from the second substrate, and patterning the first conductive layer to obtain a pattern of one of the row electrodes and the column electrodes;

forming an insulating layer on a side of the first conductive layer away from the second substrate;

A second conductive layer is formed on a side of the insulating layer away from the second substrate, and the second conductive layer is The electrical layer is patterned to obtain a pattern of the other of the row electrode and the column electrode;

The steps of manufacturing the first substrate specifically include:

providing a first substrate;

A third conductive layer is formed on the first substrate, and the third conductive layer is patterned to obtain a pattern of a first electrode.

Exemplarily, aligning the first substrate and the second substrate and providing a multistable liquid crystal layer between the first substrate and the second substrate specifically includes:

The first substrate and the second substrate are combined with frame sealants around the first substrate to form a box, and a plurality of cutouts are reserved on the frame sealants to form a hollow box surrounded by the first substrate, the second substrate and the frame sealants;

Placing the empty box in the cavity of the crystal filling equipment, and evacuating the cavity of the crystal filling equipment;

The empty box is immersed in a liquid crystal vessel in the cavity of the crystal filling device, and the cavity of the crystal filling device is filled with air, so that the liquid crystal is immersed in the space inside the empty box through the fracture.

A display driving method for a display panel, used for driving the display panel as described above to display, the method comprising:

By means of timing control, electrical signals are applied separately to at least one of the row electrodes and at least one of the column electrodes to separately control the driving voltage on at least one of the pixel points, so as to adjust the arrangement state of the cholesteric liquid crystal molecules on each of the pixel points to realize the display of each of the pixel points.

Exemplarily, the method specifically includes:

A display cycle includes a first control stage and a second control stage which are arranged in sequence.

In the first control stage, a first pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a field-induced nematic phase state;

In the second control stage, a second pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to the first part of the pixels to control the cholesteric liquid crystal at the first part of the pixels to be in a planar texture state, and a third pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to the second part of the pixels to control the cholesteric liquid crystal at the second part of the pixels to be in a focal conic state.

Exemplarily, the method specifically includes:

In the first control stage and the second control stage, the voltage signal on the row electrodes corresponding to all the pixels is a first alternating voltage,

In the first control stage, a second AC voltage is applied to the column electrodes corresponding to all the pixels, and the voltage value of the second AC voltage is greater than the first AC voltage; in the second control stage, the voltage signal applied to the column electrodes corresponding to the first part of pixels is a third AC voltage, and a fourth AC voltage is applied to the column electrodes corresponding to the second part of pixels, and the second AC voltage is greater than the voltage value of the fourth AC voltage, and the voltage value of the fourth AC voltage is greater than the voltage value of the third AC voltage.

Exemplarily, the method specifically includes:

A display cycle includes a first control stage, a second control stage and a third control stage which are arranged in sequence.

In the second control stage, a second pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a planar texture state;

In the third control stage, the row electrodes and the column electrodes corresponding to the first part of the pixels maintain the second pulse voltage signal so that the cholesteric liquid crystal at the first part of the pixel locations is in a planar texture state, and the third pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to the second part of the pixels so that the cholesteric liquid crystal at the second part of the pixel locations is in a focal conic state.

Exemplarily, the method specifically includes:

In the first control stage, the second control stage and the third control stage, the voltage signal on the row electrodes corresponding to all the pixels is a first alternating voltage,

In the first control stage, a second AC voltage is applied to the column electrodes corresponding to all the pixels, and the voltage value of the second AC voltage is greater than the voltage value of the first AC voltage; in the second control stage, the voltage signal applied to the column electrodes corresponding to all the pixels is a third AC voltage; in the third control stage, the voltage signal applied to the column electrodes corresponding to the first part of the pixels is a fourth AC voltage, and the voltage signal applied to the column electrodes corresponding to the second part of the pixels is a fourth AC voltage. A fifth AC voltage is applied to the first AC line, the voltage value of the fifth AC voltage is greater than the voltage value of the fourth AC voltage, and the second AC voltage is greater than the voltage value of the fifth AC voltage.

Exemplarily, the method specifically includes:

In the third control stage, the row electrodes and the column electrodes corresponding to the first part of the pixels maintain the second pulse voltage signal so that the cholesteric liquid crystals at the first part of the pixel locations are in a planar texture state, and different third pulse voltage signals are applied to the row electrodes and the column electrodes corresponding to the pixels for different grayscale displays in the second part of the pixels, respectively, so that the cholesteric liquid crystals at different pixel locations in the second part of the pixels are in a focal conic state.

Exemplarily, the method specifically includes:

In the first control stage, a second AC voltage is applied to the column electrodes corresponding to all the pixels, and the voltage value of the second AC voltage is greater than the voltage value of the first AC voltage; in the second control stage, the voltage signal applied to the column electrodes corresponding to all the pixels is a third AC voltage; in the third control stage, the voltage signal applied to the column electrodes corresponding to the first part of the pixels is a fourth AC voltage, and different fifth AC voltages are respectively applied to the column electrodes corresponding to the pixels for different grayscale displays in the second part of the pixels, the first two AC voltages are greater than the voltage value of the fifth AC voltage, and the voltage value of the fifth AC voltage is greater than the voltage values of the third AC voltage and the fourth AC voltage.

A computer storage medium stores a computer program, wherein the computer program is used to execute the display driving method of the display panel.

The beneficial effects brought by the embodiments of the present disclosure are as follows:

The display panel and its manufacturing method, display driving method and storage medium provided by the embodiments of the present disclosure, the first electrode in the display substrate can cover the entire display area as a common electrode, the second electrode can include multiple row electrodes and multiple column electrodes that cross each other vertically and horizontally, and multiple pixel points are defined by the intersection of the multiple row electrodes and the multiple column electrodes. The liquid crystal molecules at each pixel point can be driven by applying an electric signal separately to at least one row electrode and at least one column electrode. Compared with the technical solution in the related art that requires at least one pixel on the array substrate to separately set a transistor switch to control the deflection of the liquid crystal molecules in the pixel, the above solution does not need to set a transistor switch in each pixel, simplifies the array substrate process, and reduces the number of mask plates; and the liquid crystal layer uses multi-stable liquid crystal molecules, which have multi-stable characteristics, and their phase change can be controlled by a pulse voltage, and do not need to be continuously powered on, which can effectively reduce logic power consumption.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a front view of a display panel in some embodiments of the present disclosure;

FIG2 is a cross-sectional view along the F-F' line in FIG1 ;

FIG3 is a schematic diagram showing the structure of a cholesteric liquid crystal in a display panel in some embodiments of the present disclosure when the cholesteric liquid crystal is in a P state;

FIG4 is a schematic diagram showing the structure of cholesteric liquid crystal in a display panel in some embodiments of the present disclosure when in FC state;

FIG5 is a schematic structural diagram showing an empty box in which a first substrate and a second substrate are assembled into a box during the manufacturing process of a display panel in some embodiments of the present disclosure;

FIG6 is a schematic diagram showing a process of manufacturing a display panel in some embodiments of the present disclosure in which an empty box is placed in an inner cavity of a wafer filling device and the inner cavity is evacuated;

FIG7 is a schematic diagram showing how an empty box is immersed in a liquid crystal vessel during the manufacturing process of a display panel in some embodiments of the present disclosure;

FIG8 is a schematic diagram showing the process of filling air into the inner cavity of a wafer filling device during the manufacturing process of a display panel in some embodiments of the present disclosure;

FIG9 is a schematic diagram showing a process of manufacturing a display panel in some embodiments of the present disclosure in which a liquid crystal is immersed in an empty box and the air pressure in the inner cavity of a crystal filling device is at atmospheric pressure;

FIG10 is a schematic diagram showing a phase change process of cholesteric liquid crystal when a two-stage driving scheme is adopted in a display driving method of a display panel in some embodiments of the present disclosure;

FIG11 is a schematic diagram showing a phase change process of cholesteric liquid crystal when a three-segment driving scheme is adopted in a display driving method of a display panel in some embodiments of the present disclosure;

FIG12 is a schematic diagram showing a test R-V curve of a cholesteric liquid crystal;

FIG13 is a schematic diagram showing the phase change process of driving a cholesteric liquid crystal to a plurality of reflective states P1, P2, ..., Pn with reflectivity between the P state and the PC state;

FIG14 is a schematic diagram of a second electrode in a display period in an embodiment;

FIG15 is a schematic diagram showing a change in a driving signal when a two-stage driving scheme is adopted in a display driving method of a display panel in some embodiments of the present disclosure;

FIG16 is a schematic diagram showing a change in a driving signal when a three-stage driving scheme is adopted in a display driving method of a display panel in some embodiments of the present disclosure;

FIG17 is a schematic diagram of a second electrode in a display period in another embodiment;

FIG18 is a schematic diagram showing a change in a driving signal when a grayscale display driving scheme is adopted in a display driving method of a display panel in some embodiments of the present disclosure;

FIG19 is a schematic diagram showing a display screen of a display panel provided by an embodiment of the present disclosure;

FIG. 20 is a schematic diagram showing a second electrode arrangement of a display panel provided in an embodiment of the present disclosure.

Detailed ways

In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the common meanings understood by persons with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate quantity limitations. Rather, it means that there is at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

Before describing in detail the display panel and its manufacturing method, display driving method and storage medium provided by the embodiments of the present disclosure, it is necessary to describe the related technologies as follows:

In the related art, the TFT-LCD display panel is a passive display mode, which requires a backlight source. At least one switching device needs to be set in each pixel on the array substrate side to control the pixel electrode signal in each pixel. Its process flow includes at least multiple processes such as the gate, active layer, source and drain of the switching device, and pixel electrode. It requires 5 to 8 masks, and the number of masks is large, and the production process is relatively complicated. The color filter substrate side needs to be set with a color filter layer and a black matrix, and the process flow includes at least multiple processes such as a color filter layer and a black matrix. The process flow is complicated and the overall power consumption is high.

The STN (Super Twisted Nematic) screen is also called a super twisted nematic liquid crystal display screen. A color filter is added to the traditional monochrome liquid crystal display, and each pixel in the monochrome display matrix is divided into three pixels. The three primary colors of red, green and blue are displayed through the color filters respectively, so as to achieve the effect of displaying color, and the colors are mainly light green and orange. In the STN display panel in the related art, the array substrate and the color film substrate are each a layer of full-surface electrodes. The STN screen belongs to a reflective LCD. Although it can reduce power consumption, the clarity is poor in a relatively dark environment. In the STN display panel in the related art, the array substrate and the color film substrate are each a layer of full-surface electrodes, which can only display a single picture, and it is impossible to accurately control the pixel electrodes individually, and it is impossible to display different numbers, texts or pictures with patterns.

In order to solve the above problems, the embodiments of the present disclosure provide a display panel and a manufacturing method thereof, a display driving method and a storage medium, which can simplify the process, reduce power consumption, and accurately control the pixels.

As shown in FIGS. 1 and 2 , the display panel 10 provided in the embodiment of the present disclosure includes a display area AA and a peripheral area B. The display area AA has a plurality of pixels P distributed in an array. The display panel 10 includes: a first substrate 100 , a second substrate 200 , a liquid crystal layer 300 and a driving circuit 400 .

The first substrate 100 and the second substrate 200 are arranged in a box. At least one of the second substrates 200 is provided with a first electrode 500, and at least one of the second substrates 200 is provided with a second electrode 600. Taking the embodiment shown in the figure as an example, the first electrode 500 is provided on the first substrate 100, and the second electrode 600 is provided on the second substrate 200. In other embodiments not shown, the first electrode 500 and the second electrode 600 may also be provided on the same substrate.

The first electrode 500 can be used as a common electrode; the second electrode 600 includes a plurality of row electrodes 610 extending along a first direction X, and a plurality of column electrodes 620 extending along a second direction Y intersecting the first direction X. The row electrodes 610 and the column electrodes 620 are arranged in different layers, and the plurality of row electrodes 610 and the plurality of column electrodes 620 intersect each other to define a plurality of intersections, and one of the intersections corresponds to at least one pixel P. The number of the row electrodes 610 and the column electrodes 620 is related to the resolution of the pixel P. For example, if the number of the row electrodes 610 is M and the number of the column electrodes 620 is N, the resolution of the pixel P is M*N. For example, if the resolution of the display panel is 232 (H)*88 (V), there are 88 rows of row electrodes, and each row has 232 pixels P. The corresponding electrode arrangement is shown in FIG20.

The liquid crystal layer 300 is disposed between the first substrate 100 and the second substrate 200, and the liquid crystal layer 300 is a multiple stable liquid crystal (MSLC). The multistable liquid crystal has a multistable characteristic, and its arrangement remains unchanged after the electric field is removed. The arrangement of the liquid crystal molecules is different depending on the magnitude of the applied electric field. The liquid crystal state remains after the electric field is removed, indicating that the liquid crystal has an infinite number of stable states. The driving circuit 400 is located in the peripheral area B, and the driving circuit 400 includes a plurality of signal transmission devices 410, and at least one of the row electrodes 610 and at least one of the column electrodes 620 are respectively and separately connected to the corresponding signal transmission devices 410, so that at least one of the row electrodes 610 and at least one of the column electrodes 620 can be separately applied with electrical signals.

In the above scheme, the first electrode 500 in the display substrate can be used as a common electrode, and the second electrode 600 can include a plurality of row electrodes 610 and a plurality of column electrodes 620 that cross each other vertically and horizontally. A plurality of pixel P points are defined by the intersection of the plurality of row electrodes 610 and the plurality of column electrodes 620. The liquid crystal molecules at each pixel P point can be driven by applying an electric signal to at least one row electrode 610 and at least one column electrode 620 separately. By applying different voltages to the pixel P point, the phase change of the cholesteric liquid crystal corresponding to each pixel P point can be controlled to achieve precise control of the pixel P point. Compared with the technical solution in the related art that requires each pixel P to be individually provided with a transistor switch on the array substrate to control the deflection of the liquid crystal molecules in the pixel P, the technical solution disclosed in the present invention does not need to provide a transistor switch in each pixel P, thereby simplifying the array substrate process and reducing The number of masks is reduced. Compared with the STN panel in the related art, the technical solution disclosed in the present invention can accurately control the pixel P; moreover, the liquid crystal layer 300 adopts a multi-stable liquid crystal. By utilizing the multi-stable characteristics of the multi-stable liquid crystal, each pixel P of the display can be stable in different reflective states for a long time under zero electric field. Applying voltage pulses can realize conversion between different stable states and grayscale display. No continuous power supply is required, which can effectively reduce logic power consumption.

It should be noted that, in some embodiments, the first electrode 500 can be used as a common electrode, which is a planar electrode that covers the entire display area AA, so that it can satisfy the application of a common signal while simplifying the process. Of course, it is understandable that in other embodiments, the first electrode 500 can also correspond to a plurality of pixels P, and is only patterned as a block electrode.

It should also be noted that in the above scheme, at least one row electrode 610 and at least one column electrode 620 are separately connected to the corresponding signal transmission device, so that at least one row electrode and at least one column electrode can be separately applied with an electrical signal, which may mean that each row electrode and each column electrode are separately connected to the corresponding signal transmission signal, so that each row electrode and each column electrode can be separately applied with an electrical signal; it may also mean that a plurality of row electrodes are divided into a plurality of groups, each group of row electrodes may include m row electrodes, m is an integer greater than 1, and each group of row electrodes can be separately applied and connected to the corresponding signal transmission device, so that each group of row electrodes can be separately applied with an electrical signal; similarly, a plurality of column electrodes are divided into a plurality of groups, each group of column electrodes may include n row electrodes, n is an integer greater than 1, and each group of column electrodes can be separately applied and connected to the corresponding signal transmission device, so that each group of column electrodes can be separately applied with an electrical signal. The figure only illustrates an embodiment in which each row electrode and each column electrode are separately applied with a signal, and is not limited to this.

As an exemplary embodiment, the multistable liquid crystal may use cholesteric liquid crystal molecules. Cholesteric liquid crystal has multistable characteristics. Under the action of an electric field, the cholesteric liquid crystal molecules can undergo phase changes, including phase changes from a planar texture state (P state) to a focal conic state (FC state), and from a field nematic state (H state) to a P state and a FC state. Each pixel P can be stabilized in a different reflective state for a long time under zero electric field. Applying a voltage pulse can achieve conversion between different stable states and grayscale display without continuous power supply. Please refer to FIG3 for a schematic diagram of the structure of the cholesteric liquid crystal molecules in the P state; FIG4 for a schematic diagram of the structure of the cholesteric liquid crystal molecules in the FC state. Reflective cholesteric liquid crystal molecules can selectively reflect light of different wavelengths to produce reflective colors by adjusting the liquid crystal pitch, and are easy to realize color display. Compared with the solution of setting a color filter layer on a color film substrate in the related art, the present disclosure does not require a color filter layer, thereby simplifying the color film substrate process; and, utilizing the multistable characteristics of cholesteric liquid crystal, each of the display under zero electric field can be The pixel P can be stable in different reflective states for a long time. Applying voltage pulses can realize conversion between different stable states and grayscale display. It does not require a backlight source or continuous power supply, which can effectively reduce logic power consumption.

As an exemplary embodiment, as shown in FIG1 , the plurality of signal transmission devices 410 include a common signal transmission device (not shown in the figure), the first electrode 500 is connected to the common signal transmission device for transmitting a common signal; the plurality of signal transmission devices 410 also include a first pulse signal transmission device 412 and a second pulse signal transmission device 413, at least one of the row electrodes 610 is correspondingly connected to one of the first pulse signal transmission devices 412, so that a first pulse signal can be applied individually to at least one of the row electrodes 610; at least one of the row electrodes 610 is correspondingly connected to one of the second pulse signal transmission devices 413, so that a second pulse signal can be applied individually to at least one of the column electrodes 620.

By adopting the above solution, the first electrode 500 can be used as a common electrode to transmit a common signal, and at least one row electrode 610 and at least one column electrode 620 in the second electrode 600 can be separately connected to the corresponding pulse signal transmission device 410 to achieve the purpose of separately transmitting signals. Of course, it can be understood that in other embodiments not shown, according to the actual application scenario, at least two row electrodes 610 can be connected to one pulse signal transmission device 410, so that the display drive of at least two rows of pixels P can be realized.

In addition, as an exemplary embodiment, as shown in Figure 1, a switch control device 700 is arranged between at least one of the row electrodes 610 and the corresponding first pulse signal transmission device 410, and the switch control device 700 is configured to be turned on when a first predetermined signal is applied and to be turned off when a second predetermined signal is applied.

Exemplarily, the switch control device 700 may include a source 710 , a drain 720 and an active layer 730 , wherein the source 720 and the drain 720 may be provided in the same layer and with the same material as at least one of the row electrode 610 and the column electrode 620 .

In the above scheme, a switch control device 700 can be set only between each or each group of row electrodes and the corresponding first pulse signal transmission device 410, and the switch control device 700 only includes the patterns of the source 710, the drain 720 and the active layer 730, and there is no need to set the gate structure of the TFT. The source 710 and the drain 720 of the switch control device 700 can be formed with the row electrode or the column electrode through the same patterning process, and only a separate patterning process of the active layer 730 needs to be added. Compared with the technical solution of setting a TFT in each sub-pixel in the related art, there is no need to set a TFT in each sub-pixel, and there is no need Graphical processes such as gate can simplify the structure and reduce the number of process steps.

For example, taking FIG. 1 as an example, when a display signal needs to be applied to the first row electrode R1 to drive the first row pixel P to display, a positive voltage can be applied to the first switch control device K1 corresponding to the first row electrode R1 to turn on the first switch control device K1, and a negative voltage is applied to the second switch control device K2 of the second row electrode R2 and the third switch control device K3 of the third row electrode R3, respectively, so that the second switch control device K2 and the third switch control device K3 are in a closed state, and then a pulse signal is applied to the first row electrode R1, and a pulse signal is applied to the column electrode 620 corresponding to the pixel P to be displayed, respectively, to complete the signal transmission of all the pixels P to be displayed in the first row. Then, the above steps can be repeated to complete the display signal transmission to other row electrodes 610 to complete the refresh of the entire screen.

It should be noted that the above description is based on an example in which the first predetermined signal is a positive voltage and the second predetermined signal is a negative voltage, but the description is not limited thereto.

It should be noted that, in the above scheme, a first electrode 500 is provided on at least one of the first substrate 100 and the second substrate 200, and a second electrode 600 is provided on at least one of them, which means that the first electrode 500 and the second electrode 600 can be respectively provided on the first substrate 100 and the second substrate 200; or, the first electrode 500 and the second electrode 600 are provided on the same substrate; or, one of the row electrode 610 and the column electrode 620 in the second electrode 600 is provided on the same substrate as the second electrode 600.

As an exemplary embodiment, as shown in FIG. 2 , the first electrode 500 is disposed on the first substrate 100 , and the second electrode 600 is disposed on the second substrate 200 .

As an exemplary embodiment, as shown in FIG2 , the stacked structure of the first substrate 100 includes: a first substrate 110, and a first electrode 500 located on a side of the first substrate 110 facing the second substrate 200. The stacked structure of the second substrate 200 includes: a second substrate 210; a driving layer located on a side of the second substrate 210 facing the first substrate 100, the driving layer including the switch control device 700; a first conductive layer 220 located on a side of the driving layer away from the second substrate 210; an insulating layer 230 located on a side of the first conductive layer 220 away from the second substrate 210; and a second conductive layer 240 located on a side of the insulating layer 230 away from the second substrate 210, wherein one of the first conductive layer 220 and the second conductive layer 240 has a pattern including a pattern of the row electrode 610, and the other has a pattern including a pattern of the column electrode 620.

By adopting the above solution, the first substrate 100 is compared with the array substrate stacking structure in the related art. The structure is simplified, no switching device is required in each pixel P, and the process is simplified. Compared with the color filter substrate in the related art, the second substrate 200 has a simplified laminated structure, no color filter layer and black matrix layer are required, and the process is simplified.

In addition, the embodiment of the present disclosure further provides a method for manufacturing the display panel 10, which is used to manufacture the display panel 10 in the embodiment of the present disclosure. The method includes:

Step S01, manufacturing a first substrate 100 and a second substrate 200, wherein at least one of the first substrate 100 and the second substrate 200 is provided with a first electrode 500, and at least one of the first substrate 100 and the second substrate 200 is provided with a second electrode 600, the first electrode 500 entirely covers the display area AA, the second electrode 600 includes a plurality of row electrodes 610 extending along a first direction X, and a plurality of column electrodes 620 extending along a second direction Y intersecting the first direction X, the row electrodes 610 and the column electrodes 620 are arranged in different layers, a plurality of the row electrodes 610 and a plurality of the column electrodes 620 intersect each other to define a plurality of intersections, and one of the intersections corresponds to at least one of the pixels P, and at least one of the first substrate 100 and the second substrate 200 is further provided with a driving circuit 400, the driving circuit 400 is located in the peripheral area B and includes a plurality of signal transmission devices 410, at least one of the row electrodes 610 and at least one of the column electrodes 620 are respectively and separately connected to the corresponding signal transmission devices 410, so that at least one of the row electrodes 610 and at least one of the column electrodes 620 can be separately applied with electrical signals;

Step S02 , aligning the first substrate 100 and the second substrate 200 , and disposing a liquid crystal layer 300 between the first substrate 100 and the second substrate 200 .

Exemplarily, when the first electrode 500 is disposed on the first substrate 100 and the second substrate 200 is disposed on the second substrate 200, the above step S01 specifically includes:

The steps of manufacturing the second substrate 200 specifically include:

Step S011, providing a second substrate 210;

Step S012, forming a driving layer 250 on the second substrate 210, wherein the driving layer 250 includes the switch control device 700;

Step S013, forming a first conductive layer 220 on a side of the driving layer 250 away from the second substrate 210, and patterning the first conductive layer 220 to obtain a pattern of one of the row electrodes 610 and the column electrodes 620;

Step S014, forming an insulating layer 230 on a side of the first conductive layer 220 away from the second substrate 210;

Step S015, forming a second conductive layer 240 on a side of the insulating layer 230 away from the second substrate 210, and patterning the second conductive layer 240 to obtain a pattern of the other of the row electrode 610 and the column electrode 620;

The steps of manufacturing the first substrate 100 specifically include:

Step S011', providing a first substrate 110;

Step S012’: forming a third conductive layer 510 on the first substrate 110, and patterning the third conductive layer 510 to obtain a pattern of the first electrode 500.

In the above scheme, the first conductive layer 220, the second conductive layer 240 and the third conductive layer can be transparent conductive layers, such as ITO (indium tin oxide), etc., and the patterning process can be a conventional composition process. In the manufacturing method of the display panel 10 provided in the embodiment of the present disclosure, the manufacturing process of the first substrate 100 and the second substrate 200 is simple, which can save the number of masks.

Exemplarily, the above step S02 specifically includes:

Step S021, the first substrate 100 and the second substrate 200 are combined with the frame sealant 700 around the first substrate 100 and the second substrate 200, and a plurality of cutouts 710 are reserved on the frame sealant 700 to form an empty box 10' in a space surrounded by the first substrate 100, the second substrate 200 and the frame sealant 700. The structure of the empty box 10' is shown in FIG5;

Step S022, as shown in FIG6 , placing the empty box 10 ′ in the cavity 20 of the wafer filling equipment, and evacuating the cavity 20 of the wafer filling equipment;

Step S023, as shown in Figure 7, immerse the empty box 10' in the liquid crystal container 30 in the crystal filling equipment cavity 20, and fill the crystal filling equipment cavity 20 with air so that the liquid crystal can penetrate into the space inside the empty box 10' through the fracture 710.

Since the viscosity of cholesteric liquid crystal is larger than that of conventional liquid crystal, generally about 30 to 90 mPaS, if the conventional ODF (drip) process is used, bubbles caused by uneven diffusion of liquid crystal are likely to occur. However, in order to solve the problem of bubbles caused by the high viscosity of cholesteric liquid crystal, a crystal filling process is adopted. Specifically, as shown in FIG6 , first, an empty box 10' without liquid crystal is placed in the cavity 20 of the crystal filling equipment, and the cavity 20 of the crystal filling equipment is evacuated; then, as shown in FIG7 , the empty box 10' is pressed into the liquid crystal dish, and a number of fractures 710 are reserved on the sealing glue 700 of the empty box 10' to facilitate crystal filling. At this time, the liquid crystal will enter the empty box 10' through capillary phenomenon, fill the cavity 20 of the crystal filling equipment with air, and use the pressure difference between the inside and outside of the empty box 10' to press the liquid crystal into the empty box 10'; as shown in FIG8 , the cavity of the crystal filling equipment is filled with air. After the air pressure in the body 20 reaches atmospheric pressure, take out the panel filled with liquid crystal.

In addition, the embodiment of the present disclosure further provides a display driving method of the display panel 10, which is used to drive the display panel 10 provided by the embodiment of the present disclosure to display, and the method includes:

Through timing control, electrical signals are applied separately to at least one row electrode 610 and at least one column electrode 620 to separately control the driving voltage on at least one pixel point P, so as to adjust the texture state of the cholesteric liquid crystal molecules on each pixel point P, so as to realize the display of each pixel point P.

Taking the driving display signal control matrix diagram of the display panel 10 as shown in FIG1 as an example, R1 to RM are M row electrodes 610, and C1 to CN are N column electrodes 620. Different electrical signals can be applied to the M row electrodes 610 and the N column electrodes 620 respectively, thereby performing display driving on M*N pixel P points.

The display driving method of the display panel 10 provided in the present disclosure may specifically include but is not limited to the following embodiments:

In one embodiment, the display driving method adopts a two-stage driving scheme, which specifically includes the following steps:

A display cycle includes a first control stage n1 and a second control stage n2 which are arranged in sequence.

In the first control stage n1, a first pulse voltage signal is applied to the row electrodes 610 and the column electrodes 620 corresponding to all the pixels P, so that the cholesteric liquid crystals at the locations of all the pixels P are in a field nematic state (H state);

In the second control stage n2, a second pulse voltage signal is applied to the row electrode 610 and the column electrode 620 corresponding to the first part of pixels (i.e., pixels that need to be displayed) to control the cholesteric liquid crystal at the first part of pixels to be in a planar texture state (P state), and a third pulse voltage signal is applied to the row electrode 610 and the column electrode 620 corresponding to the second part of pixels (i.e., pixels that do not need to be displayed) to control the cholesteric liquid crystal at the second part of pixels to be in a focal conic state (FC state).

In the above scheme, the first control stage n1 first applies a first pulse voltage signal to all pixel P points, and the first pulse voltage signal can be a high voltage, such as a high voltage of 20 to 30V, so that the cholesteric liquid crystals on all pixel P points are driven to change their phase to a field-induced nematic state (H state), which is a non-steady state; then, in the second control stage n2, a second pulse voltage signal is applied to all the first part of the pixel points that need to be displayed, for example, the second pulse voltage signal can be 0V, that is, all the pixels that need to be displayed are turned off. All pixels in the first part are powered off instantaneously, so that the liquid crystal at the first part of the pixel positions is driven to change phase to a planar texture state (P state). At the same time, a third pulse voltage signal is applied to the liquid crystal at other pixel positions in the second part that do not need to be displayed. The third pulse voltage signal can be about 10 to 15V, that is, the third pulse voltage signal is smaller than the first pulse voltage signal, so that the liquid crystal at the second part of the pixel positions that do not need to be displayed is driven to change phase to a focal cone state (FC state), thereby realizing display drive of different pixel P positions.

As a more specific embodiment, the method specifically includes:

In the first control stage n1 and the second control stage n2, the voltage signal on the row electrodes 610 corresponding to all the pixels P is a first AC voltage, which may be close to or equal to 0V, for example; in the first control stage n1, a second AC voltage is applied to the column electrodes 620 corresponding to all the pixels P, and the second AC voltage is greater than the voltage value of the first AC voltage; in the second control stage n2, the voltage signal applied to the column electrodes 620 corresponding to the first part of the pixels is a third AC voltage, which may be close to 0V, for example, and a fourth AC voltage is applied to the column electrodes 620 corresponding to the second part of the pixels, and the second AC voltage is greater than the voltage value of the fourth AC voltage, and the voltage value of the fourth AC voltage is greater than the voltage value of the third AC voltage.

To explain the above method in more detail, please refer to Figures 14 and 15. Figure 14 is a schematic diagram of a display cycle in an electrode unit in an embodiment, wherein R1 is the first row electrode R1, C1 is the first column electrode, C2 is the second column electrode, the pixel P corresponding to the first row electrode R1 and the first column electrode is P1, and the pixel P corresponding to the first row electrode R1 and the second column electrode is P2. Then, the electrical signal of the pixel P1 is the difference between the signals of the first column electrode C1 and the first row electrode R1, and the electrical signal of the pixel P2 is the difference between the signals of the second column electrode C2 and the first row electrode R1.

As shown in FIGS. 10 and 15 , in the first control stage n1, the voltage signal applied to the first row electrode R1 is 0V, the first column electrode C1 and the second column electrode C2 are first AC voltage signals, for example, ±20V, the signal of the pixel P1 is the voltage difference between the first column electrode C1 and the first row electrode R1, and the signal of the pixel P2 is the voltage difference between the second column electrode C2 and the second row electrode R2. At this time, the signals of the pixel P1 and the pixel P2 are both AC voltage signals of ±20V, so that the cholesteric liquid crystal corresponding to the pixel P1 and the pixel P2 are driven to present the H state;

In the second control stage n2, the voltage signal of the first row electrode R1 is kept at 0V, and the voltage signal of the first column electrode R2 is kept at 0V. The signal of electrode C1 is adjusted to 0V, and the signal of the second column electrode C2 is adjusted to a second AC voltage, for example, ±10V. The signal of pixel P1 is the voltage difference between the first column electrode C1 and the first row electrode R1, and the signal of pixel P2 is the voltage difference between the second column electrode C2 and the first row electrode R1. At this time, the signal of pixel P1 becomes 0V, so that the cholesteric liquid crystal corresponding to the pixel P1 point is driven to the P state, and the signal of pixel P2 is adjusted to the second AC voltage, for example, ±10V, so that the cholesteric liquid crystal corresponding to the pixel P2 point is driven to the FC state. Through this driving method, the pixel P points at different positions on the display panel 10 are switched to the P state or the FC state according to needs, so as to display different pictures.

As another exemplary embodiment, the display driving method adopts a three-stage driving scheme, which specifically includes the following steps:

A display cycle includes a first control stage n1, a second control stage n2 and a third control stage n3 which are arranged in sequence.

In the first control stage n1, a first pulse voltage signal is applied to the row electrodes 610 and the column electrodes 620 corresponding to all the pixels P, so that the cholesteric liquid crystals at the locations of all the pixels P are in a field-induced nematic state;

In the second control stage n2, a second pulse voltage signal is applied to the row electrodes 610 and the column electrodes 620 corresponding to all the pixels P, so that the cholesteric liquid crystals at all the pixels P are in a planar texture state;

In the third control stage n3, the row electrodes 610 and the column electrodes 620 corresponding to the first part of the pixels maintain the second pulse voltage signal so that the cholesteric liquid crystal at the first part of the pixel locations is in a planar texture state, and the third pulse voltage signal is applied to the row electrodes 610 and the column electrodes 620 corresponding to the second part of the pixels so that the cholesteric liquid crystal at the second part of the pixel locations is in a focal conic state.

In the above scheme, in the first control stage n1, a first pulse voltage signal is first applied to all pixel P points, and the first pulse voltage signal can be a high voltage, such as a high voltage of 20 to 30V, so that the cholesteric liquid crystals at all pixel P points are driven to change their phase to a field-induced nematic state (H state), which is a non-steady state; then, a second pulse voltage signal, such as 0V, is applied to the voltages at all pixel P points, that is, all pixels P are instantly powered off, so that the cholesteric liquid crystals at all the pixel P points are in a planar texture state; then, in the third control stage n3, the second pulse voltage signal is maintained for all the first part of the pixel points that need to be displayed, that is, maintained at 0V, so that the liquid crystals at the first part of the pixel points are driven The dynamic phase changes to a planar texture state (P state). At the same time, a third pulse voltage signal is applied to the liquid crystal at the other second part pixel positions that do not need to be displayed. The third pulse voltage signal can be about 10 to 15V. That is to say, the third pulse voltage signal is smaller than the first pulse voltage signal, so that the liquid crystal at the second part pixel positions that do not need to be displayed is driven to change phase and take a focal conic state (FC state), thereby realizing the display drive of different pixel P positions.

Compared with the two-stage driving scheme, the above three-stage driving scheme will drive all the liquid crystals at the P point of all pixels from the H state to the P state, and then drive the liquid crystals at the P point of the pixels that do not need to be displayed to the FC state. The refresh frequency will be lower than the two-stage driving scheme, but it is more conducive to the uniformity and stability of the picture. In actual applications, the two driving schemes can be reasonably selected according to the actual product application scenarios and other requirements.

In addition, as a more specific embodiment, in the above three-stage driving scheme, the method specifically includes:

In the first control stage n1, the second control stage n2 and the third control stage n3, the voltage signal on the row electrodes 610 corresponding to all the pixels P is a first AC voltage, which may be close to or equal to 0V, for example. In the first control stage n1, a second AC voltage is applied to the column electrodes 620 corresponding to all the pixels P, and the second AC voltage is greater than the voltage value of the first AC voltage. In the second control stage n2, the voltage signal applied to the column electrodes 620 corresponding to all the pixels P is a third AC voltage, which may be close to or equal to 0V, for example. In the third control stage n3, the voltage signal applied to the column electrodes 620 corresponding to the first part of the pixels is a fourth AC voltage, which may be close to or equal to 0V, for example. A fifth AC voltage is applied to the column electrodes 620 corresponding to the second part of the pixels, and the voltage value of the fifth AC voltage is greater than the voltage value of the fourth AC voltage, and the second AC voltage is greater than the voltage value of the fifth AC voltage.

To explain the above method in more detail, please refer to Figures 14 and 16. Figure 14 is a schematic diagram of a display cycle in an electrode unit in an embodiment, wherein R1 is the first row electrode R1, C1 is the first column electrode, C2 is the second column electrode, the pixel P corresponding to the first row electrode R1 and the first column electrode is P1, and the pixel P corresponding to the first row electrode R1 and the second column electrode is P2. Then, the electrical signal of the pixel P1 is the difference between the signals of the first column electrode C1 and the first row electrode R1, and the electrical signal of the pixel P2 is the difference between the signals of the second column electrode C2 and the first row electrode R1.

As shown in FIG. 11 and FIG. 16 , in the first control stage n1, the voltage signal of the first row electrode R1 is 0V, the first column electrode C1 and the second column electrode C2 are respectively the first AC voltage signals, for example, ±20V, the signal of the pixel P1 is the voltage difference between the first column electrode C1 and the first row electrode R1, and the signal of the pixel P2 is the voltage difference between the second column electrode C2 and the first row electrode R1, then the signals of the pixel P1 and the pixel P2 are both the first AC voltage signals, so that the cholesteric liquid crystal corresponding to the pixel P1 and the pixel P2 are driven to the H state;

In the second control stage n2, the voltage signal of the first row electrode R1 is kept at 0V, the signals of the first column electrode C1 and the second column electrode C2 are adjusted to 0V, the signal of the pixel P1 is the voltage difference between the first column electrode C1 and the first row electrode R1, and the signal of the pixel P2 is the voltage difference between the second column electrode C2 and the first row electrode R1, then the signals of the pixel P1 and the pixel P2 are both changed to 0V, so that the cholesteric liquid crystals corresponding to the electrode points of the pixel P1 and the pixel P2 are driven to the P state;

In the third control stage n3, the voltage signal of the first row electrode R1 and the first column electrode C1 is maintained at 0V, and the signal of the second column electrode C2 is adjusted to a second AC voltage, for example, ±10V. The signal of the pixel P1 is the voltage difference between the first column electrode C1 and the first row electrode R1, and the signal of the pixel P2 is the voltage difference between the second column electrode C2 and the first row electrode R1. The signal of the pixel P1 is still maintained at 0V, and the cholesteric liquid crystal corresponding to the pixel P1 point is still maintained in the P state. The signal of the pixel P2 is adjusted to the second AC voltage, for example, ±10V, so that the cholesteric liquid crystal corresponding to the pixel P2 point is driven to the FC state. Through this driving method, the pixel P points at different positions on the display panel 10 are switched to the P state or the FC state according to needs, so as to display different pictures.

In addition, as an exemplary embodiment, the display driving method of the display panel 10 provided in the embodiment of the present disclosure can also realize grayscale display, and its grayscale display driving scheme is as follows:

In the third control stage n3, the row electrodes 610 and the column electrodes 620 corresponding to the first part of the pixels maintain the second pulse voltage signal so that the cholesteric liquid crystals at the first part of the pixel locations are in a planar texture state, and different third pulse voltage signals are applied to the row electrodes 610 and the column electrodes 620 corresponding to the pixels P for displaying different grayscales in the second part of the pixels, respectively, so that the cholesteric liquid crystals at different pixel P locations in the second part of the pixels are in different focal conic states.

The test R-V curve of the cholesteric liquid crystal is shown in Figure 12. The pulse voltage when the liquid crystal is driven to the P state is about 20V, and the pulse voltage when it is driven to the FC state is about 10-15V. Multiple pulse voltages can be set between the P state and the FC state. When the pulse voltage is between the P state and the FC state voltage, the cholesteric liquid crystal can be driven to present multiple reflection states such as P1, P2...Pn. The reflectivity of these reflection states is between the P state and the PC state, as shown in Figure 13, so that the display panel 10 can achieve multi-grayscale display.

As a more specific embodiment, the method specifically includes:

In the first control stage n1, the second control stage n2 and the third control stage n3, the voltage signal on the row electrode 610 corresponding to all the pixels P is a first AC voltage, and the first AC voltage may be close to or equal to 0V.

In the first control stage n1, a second AC voltage is applied to the column electrodes 620 corresponding to all the pixels P, and the voltage value of the second AC voltage is greater than the voltage value of the first AC voltage; in the second control stage n2, the voltage signal applied to the column electrodes 620 corresponding to all the pixels P is a third AC voltage, and the third AC voltage can be close to or equal to 0V; in the third control stage n3, the voltage signal applied to the column electrodes 620 corresponding to the first part of the pixels is a fourth AC voltage, and the fourth AC voltage can be close to or equal to 0V, and different fifth AC voltages are respectively applied to the column electrodes 620 corresponding to the pixels P for different grayscale displays in the second part of the pixels, and the second AC voltage is greater than the voltage value of the fifth AC voltage, and the voltage value of the fifth AC voltage is greater than the voltage values of the third AC voltage and the fourth AC voltage.

For a more detailed description, take adding a specific implementation scheme of grayscale as an example:

Please refer to FIG. 17, which illustrates a schematic diagram of a small period of an electrode unit, R1 represents the first row electrode R1, C1, C2 and C3 represent the first column electrode, the second column electrode and the third column electrode respectively, the pixel P corresponding to the first row electrode R1 and the first column electrode is P1, the pixel P corresponding to the first row electrode R1 and the second column electrode is P2, and the pixel P corresponding to the first row electrode R1 and the third column electrode is P3, then the signal of pixel P1 is the difference between the signal of the first column electrode C1 and the signal of the first row electrode R1, and the signal of pixel P2 is the difference between the signal of the first column electrode C1 and the signal of the first row electrode R1. The signal of the pixel P3 is the difference between the signals of the second column electrode C2 and the first row electrode R1 , and the signal of the pixel P3 is the difference between the signals of the third column electrode C3 and the first row electrode R1 .

As shown in FIG. 18 , in the first control stage n1, the voltage signal of the first row electrode R1 is 0V, the voltage signals of the first column electrode C1, the second column electrode C2 and the third column electrode C3 are respectively the first AC voltage signals, for example, ±20V, the signal of the pixel P1 is the first column electrode C1 minus the first row electrode R1, the signal of the pixel P2 is the voltage difference between the second column electrode C2 and the first row electrode R1, the signal of the pixel P3 is the voltage difference between the third column electrode C3 and the first row electrode R1, then the pixels P1, P2 and P3 are all ±20V AC voltage signals, so that the cholesteric liquid crystals corresponding to the electrode positions of the pixels P1, P2 and P3 are driven to the H state;

In the second control stage n2, the voltage signal of the first row electrode R1 is kept at 0V, and the signals of the first column electrode C1, the second column electrode C2, and the third column electrode C3 are all adjusted to 0V. The signal of the pixel P1 is the voltage difference between the first column electrode C1 and the first row electrode R1, the signal of the pixel P2 is the voltage difference between the second column electrode C2 and the first row electrode R1, and the signal of the pixel P3 is the voltage difference between the third column electrode C3 and the first row electrode R1. Then, the signals of the pixel P1, the pixel P2, and the pixel P3 are all changed to 0V, so that the cholesteric liquid crystals corresponding to the pixel P1, the pixel P2, and the pixel P3 are all driven to the P state.

In the third control stage n3, the voltage signals of the first row electrode R1 and the first column electrode C1 are maintained at 0V, the signal of the second column electrode C2 is adjusted to ±10V, and the signal of the third column electrode C3 is adjusted to ±15V. The signal of pixel P1 is the first column electrode C1 minus the first row electrode R1, the signal of pixel P2 is the second column electrode C2 minus the first row electrode R1, and the signal of pixel P3 is the third column electrode C3 minus the first row electrode R1. The signal of pixel P1 is still maintained at 0V, and the cholesteric liquid crystal corresponding to the electrode position of pixel P1 is still maintained in the P state. The signal of pixel P2 is adjusted to ±10V, and after the second column electrode C2 is powered off, the cholesteric liquid crystal corresponding to the electrode position of pixel P2 is driven to the FC state. The signal of pixel P3 is adjusted to ±15V, and after the third column electrode C3 is powered off, the cholesteric liquid crystal corresponding to the electrode position of pixel P3 is driven to a state between the P state and the FC state, which is called the pixel P1 state.

Through the above-mentioned grayscale driving method, the pixel P points at different positions on the display panel 10 can be switched to the P state or the FC state according to the needs, and an additional grayscale pixel P1 state is added. For each additional grayscale, a group of pulse signals is added accordingly during driving. For example, if n grayscales are to be displayed, n groups of pulse signals are added. In this way, the grayscale driving display of cholesteric liquid crystal can be realized.

In addition, the present disclosure also provides a computer storage medium, wherein the storage medium stores There is a computer program, which is used to execute the display driving method of the display panel 10 provided in the embodiment of the present disclosure.

There are a few points to note:

(1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure, and other structures may refer to the general design.

(2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of layers or regions is exaggerated or reduced, that is, these drawings are not drawn according to the actual scale. It is understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or there may be intermediate elements.

(3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

The above are only specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and the protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

A display panel, comprising a display area and a peripheral area, wherein the display area has a plurality of pixels distributed in an array; wherein the display panel comprises:

A first substrate and a second substrate are arranged in a pair of boxes, at least one of the first substrate and the second substrate is provided with a first electrode, at least one of the first substrate and the second substrate is provided with a second electrode, the second electrode comprises a plurality of row electrodes extending along a first direction, and a plurality of column electrodes extending along a second direction intersecting the first direction, the row electrodes and the column electrodes are arranged in different layers, a plurality of the row electrodes and the plurality of the column electrodes intersect each other to define a plurality of intersections, and one of the intersections corresponds to at least one of the pixels;

a multistable liquid crystal layer disposed between the first substrate and the second substrate; and

A driving circuit is located in the peripheral area and includes a plurality of signal transmission devices, at least one of the row electrodes and at least one of the column electrodes are separately connected to the corresponding signal transmission devices, so that at least one of the row electrodes and at least one of the column electrodes can be separately applied with electrical signals.
The display panel according to claim 1, characterized in that

The multistable liquid crystal layer includes cholesteric liquid crystal molecules.
The display panel according to claim 1, characterized in that

The plurality of signal transmission devices include a common signal transmission device, the first electrode is connected to the common signal transmission device for transmitting a common signal;

The multiple signal transmission devices also include a first pulse signal transmission device and a second pulse signal transmission device. At least one of the row electrodes is correspondingly connected to one of the first pulse signal transmission devices so that a first pulse signal can be applied individually to at least one of the row electrodes; at least one of the row electrodes is correspondingly connected to one of the second pulse signal transmission devices so that a second pulse signal can be applied individually to at least one of the column electrodes.
The display panel according to claim 3, characterized in that

A switch control device is arranged between at least one of the row electrodes and the corresponding first pulse signal transmission device, and the switch control device is configured to be turned on when a first predetermined signal is applied, and to be turned off when a second predetermined signal is applied.
The display panel according to claim 4, characterized in that the switch control device comprises a source electrode, a drain electrode and a pattern of an active layer, wherein the source electrode, the drain electrode and the row electrode and the At least one of the column electrodes is provided in the same layer and with the same material.
The display panel according to claim 4, characterized in that the first electrode is arranged on the first substrate, and the second electrode is arranged on the second substrate.
The display panel according to claim 4, characterized in that the stacked structure of the first substrate comprises: a first substrate, and a first electrode located on a side of the first substrate facing the second substrate;

The laminated structure of the second substrate comprises:

a second substrate;

a driving circuit layer located on a side of the second substrate facing the first substrate, the driving circuit layer including the switch control device;

A first conductive layer located on a side of the driving circuit layer away from the second substrate;

an insulating layer located on a side of the first conductive layer away from the second substrate;

A second conductive layer is located on a side of the insulating layer away from the second substrate, wherein a pattern of one of the first conductive layer and the second conductive layer includes a pattern of the row electrodes, and a pattern of the other includes a pattern of the column electrodes.
A method for manufacturing a display panel, characterized in that the method comprises:

Manufacturing a first substrate and a second substrate, wherein at least one of the first substrate and the second substrate is provided with a first electrode, and at least one of the first substrate and the second substrate is provided with a second electrode, the second electrode comprises a plurality of row electrodes extending along a first direction, and a plurality of column electrodes extending along a second direction intersecting the first direction, the row electrodes and the column electrodes are arranged in different layers, a plurality of the row electrodes and a plurality of the column electrodes intersect each other to define a plurality of intersections, and one of the intersections corresponds to at least one of the pixels, and at least one of the first substrate and the second substrate is further provided with a driving circuit, the driving circuit is located in the peripheral area and comprises a plurality of signal transmission devices, at least one of the row electrodes and at least one of the column electrodes are respectively and individually connected to the corresponding signal transmission devices, so that at least one of the row electrodes and at least one of the column electrodes can be respectively and individually applied with an electrical signal;

The first substrate and the second substrate are assembled into a cell, and a multistable liquid crystal layer is disposed between the first substrate and the second substrate.
The method for manufacturing a display panel according to claim 8, characterized in that:

The first electrode is disposed on the first substrate, and the second substrate is disposed on the second substrate When the first substrate and the second substrate are formed, the manufacturing step specifically includes:

The steps of manufacturing the second substrate specifically include:

providing a second substrate;

forming a driving circuit layer on the second substrate, wherein the driving circuit layer includes the switch control device;

forming a first conductive layer on a side of the driving circuit layer away from the second substrate, and patterning the first conductive layer to obtain a pattern of one of the row electrodes and the column electrodes;

forming an insulating layer on a side of the first conductive layer away from the second substrate;

forming a second conductive layer on a side of the insulating layer away from the second substrate, and patterning the second conductive layer to obtain a pattern of the other of the row electrode and the column electrode;

The steps of manufacturing the first substrate specifically include:

providing a first substrate;

A third conductive layer is formed on the first substrate, and the third conductive layer is patterned to obtain a pattern of a first electrode.
The method according to claim 9, characterized in that the step of aligning the first substrate and the second substrate and providing a multistable liquid crystal layer between the first substrate and the second substrate specifically comprises:

The first substrate and the second substrate are combined with frame sealants around the first substrate to form a box, and a plurality of cutouts are reserved on the frame sealants to form a hollow box surrounded by the first substrate, the second substrate and the frame sealants;

Placing the empty box in the cavity of the crystal filling equipment, and evacuating the cavity of the crystal filling equipment;

The empty box is immersed in a liquid crystal vessel in the cavity of the crystal filling device, and the cavity of the crystal filling device is filled with air, so that the liquid crystal is immersed in the space inside the empty box through the fracture.
A display driving method for a display panel, characterized in that it is used to drive the display panel according to any one of claims 1 to 7 to display, and the method comprises:

By means of timing control, electrical signals are applied separately to at least one of the row electrodes and at least one of the column electrodes to separately control the driving voltage on at least one of the pixel points, so as to adjust the arrangement state of the cholesteric liquid crystal molecules on each of the pixel points to realize the display of each of the pixel points.
The method according to claim 11, characterized in that the method specifically comprises:

A display cycle includes a first control stage and a second control stage which are arranged in sequence.

In the first control stage, a first pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a field-induced nematic phase state;

In the second control stage, a second pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to the first part of the pixels to control the cholesteric liquid crystal at the first part of the pixels to be in a planar texture state, and a third pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to the second part of the pixels to control the cholesteric liquid crystal at the second part of the pixels to be in a focal conic state.
The method according to claim 12, characterized in that the method specifically comprises:

In the first control stage and the second control stage, the voltage signal on the row electrodes corresponding to all the pixels is a first alternating voltage,

In the first control stage, a second AC voltage is applied to the column electrodes corresponding to all the pixels, and the voltage value of the second AC voltage is greater than the first AC voltage; in the second control stage, the voltage signal applied to the column electrodes corresponding to the first part of pixels is a third AC voltage, and a fourth AC voltage is applied to the column electrodes corresponding to the second part of pixels, and the second AC voltage is greater than the voltage value of the fourth AC voltage, and the voltage value of the fourth AC voltage is greater than the voltage value of the third AC voltage.
The method according to claim 11, characterized in that the method specifically comprises:

A display cycle includes a first control stage, a second control stage and a third control stage which are arranged in sequence.

In the first control stage, a first pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a field-induced nematic state;

In the second control stage, a second pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a planar texture state;

In the third control stage, the row electrodes and the column electrodes corresponding to the first part of the pixels maintain the second pulse voltage signal, so that the cholesteric liquid crystal at the first part of the pixel points is in a planar state. Texture state, applying a third pulse voltage signal to the row electrodes and the column electrodes corresponding to the second part of pixels, so that the cholesteric liquid crystals at the second part of pixel locations are in a focal conic state.
The method according to claim 14, characterized in that the method specifically comprises:

In the first control stage, the second control stage and the third control stage, the voltage signal on the row electrodes corresponding to all the pixels is a first alternating voltage,

In the first control stage, a second AC voltage is applied to the column electrodes corresponding to all the pixels, and the voltage value of the second AC voltage is greater than the voltage value of the first AC voltage; in the second control stage, the voltage signal applied to the column electrodes corresponding to all the pixels is a third AC voltage; in the third control stage, the voltage signal applied to the column electrodes corresponding to the first part of the pixels is a fourth AC circuit, and a fifth AC voltage is applied to the column electrodes corresponding to the second part of the pixels, and the voltage value of the fifth AC voltage is greater than the voltage value of the fourth AC voltage, and the second AC voltage is greater than the voltage value of the fifth AC voltage.
The method according to claim 11, characterized in that the method specifically comprises:

A display cycle includes a first control stage, a second control stage and a third control stage which are arranged in sequence.

In the first control stage, a first pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a field-induced nematic phase state;

In the second control stage, a second pulse voltage signal is applied to the row electrodes and the column electrodes corresponding to all the pixels, so that the cholesteric liquid crystals at all the pixel locations are in a planar texture state;

In the third control stage, the row electrodes and the column electrodes corresponding to the first part of the pixels maintain the second pulse voltage signal so that the cholesteric liquid crystals at the first part of the pixel locations are in a planar texture state, and different third pulse voltage signals are applied to the row electrodes and the column electrodes corresponding to the pixels for different grayscale displays in the second part of the pixels, respectively, so that the cholesteric liquid crystals at different pixel locations in the second part of the pixels are in a focal conic state.
The method according to claim 16, characterized in that the method specifically comprises:

In the first control stage, the second control stage and the third control stage, the voltage signal on the row electrodes corresponding to all the pixels is a first alternating voltage,

In the first control stage, a second AC voltage is applied to the column electrodes corresponding to all the pixels, and the voltage value of the second AC voltage is greater than the voltage value of the first AC voltage; in the second control stage, the voltage signal applied to the column electrodes corresponding to all the pixels is a third AC voltage; in the third control stage, the voltage signal applied to the column electrodes corresponding to the first part of the pixels is a fourth AC voltage, and different fifth AC voltages are respectively applied to the column electrodes corresponding to the pixels for different grayscale displays in the second part of the pixels, the first two AC voltages are greater than the voltage value of the fifth AC voltage, and the voltage value of the fifth AC voltage is greater than the voltage values of the third AC voltage and the fourth AC voltage.
A computer storage medium, characterized in that the storage medium stores a computer program, and the computer program is used to execute the display driving method of the display panel described in any one of claims 11-17 above.