Display device and its driving method

Abstract

A display device and its driving method; the display device includes: a backlight module (1); a liquid crystal touch display panel (2) located on the light-emitting side of the backlight module (1); and a liquid crystal grating panel (3) located between the backlight module (1) and the liquid crystal touch display panel (2).

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display device and its driving method. Background Technology

[0002] Glasses-free 3D display products are favored by users because they can achieve stereoscopic display without the need for auxiliary tools.

[0003] Currently, large-sized touchscreen products typically employ non-built-in touch modules for glasses-free 3D display technology, achieving 3D by adding a liquid crystal grating above the LCD panel. However, for small and medium-sized products such as tablets, the touch module is integrated into the display panel, using in-cell technology. In in-cell display products, if the liquid crystal grating is directly superimposed on the light-emitting side of the display panel, the electrodes in the grating will shield the touch electrodes in the touch module, preventing them from sensing the charge from a human finger. This can lead to touch malfunction and a significant decrease in display brightness. Summary of the Invention

[0004] This disclosure provides a display device comprising:

[0005] Backlight module;

[0006] The LCD touch display panel is located on the light-emitting side of the backlight module;

[0007] The LCD grating panel is located between the backlight module and the LCD touch display panel.

[0008] In some embodiments, the display device further includes:

[0009] The first polarizer is located between the liquid crystal grating panel and the backlight module;

[0010] The second polarizer is located between the liquid crystal grating panel and the liquid crystal touch display panel;

[0011] The third polarizer is located on the side of the LCD touch display panel that is away from the LCD grating panel.

[0012] In some embodiments, the display device further includes:

[0013] A multilayer reflective polarizer is located between the first polarizer and the backlight module.

[0014] In some embodiments, the liquid crystal grating panel includes:

[0015] The first array substrate includes a first substrate and a first transparent electrode layer located between the first substrate and the liquid crystal touch display panel; the first transparent electrode layer is used to receive AC drive signals.

[0016] The first liquid crystal layer is located between the first array substrate and the liquid crystal touch display panel;

[0017] The first opposing substrate is located between the first liquid crystal layer and the liquid crystal touch display panel, and includes a second substrate and a second transparent electrode layer located between the second substrate and the first liquid crystal layer; the second transparent electrode layer is used to receive DC drive signals.

[0018] In some embodiments, the first transparent electrode layer includes:

[0019] The first sub-electrode layer includes a plurality of first strip electrodes arranged at intervals;

[0020] The second sub-electrode layer is located between the first sub-electrode layer and the first liquid crystal layer, and includes a plurality of second strip electrodes spaced apart; the first strip electrodes and the second strip electrodes extend in the same direction, and the orthographic projection of the second strip electrodes on the first substrate covers the area between two adjacent first strip electrodes on the orthographic projection of the first substrate.

[0021] The second transparent electrode layer includes planar electrodes disposed across the entire surface.

[0022] In some embodiments, the display device further includes: a first driver electrically connected to a liquid crystal touch display panel, a second driver electrically connected to a liquid crystal grating panel, and a main controller electrically connected to the first driver and the second driver;

[0023] The main controller is used to: send first refresh frequency information to the first driver according to the screen to be displayed; send frame frequency information and raster driving information corresponding to the first refresh frequency information to the second driver; the first refresh frequency carried by the first refresh frequency information is the same as the first frequency carried by the frame frequency information;

[0024] The first driver is used to: drive the liquid crystal touch display panel to display the image to be displayed using the first refresh frequency according to the first refresh frequency information; and to perform touch recognition using the first driving frequency that matches the first refresh frequency during the touch recognition stage.

[0025] The second driver is used to: adjust the driving frequency of the raster driving information according to the frame frequency information, and generate a raster driving signal with a second driving frequency; the second driving frequency is different from both the first refresh frequency and the first driving frequency.

[0026] In some embodiments, the second driver includes:

[0027] The receiving circuit is used to receive frame frequency information and raster driving information, decode the frame frequency information, and output the decoded information and raster driving information.

[0028] A drive signal generation circuit is used to generate a grating drive signal based on grating drive information.

[0029] The timing control circuit is used to adjust the timing of the grating drive signal according to the decoded information and output the grating drive signal at the second drive frequency.

[0030] In some embodiments, the timing control circuit includes:

[0031] A serial peripheral interface is used to output a grating drive signal at a second drive frequency.

[0032] In some embodiments, the second driving frequency is greater than the first refresh frequency and less than the first driving frequency.

[0033] In some embodiments, the difference between the driving frequency of the grating driving signal and the first refresh frequency is greater than or equal to 10 Hz and less than or equal to 25 Hz.

[0034] In some embodiments, the liquid crystal grating panel includes a first transparent electrode layer and a second transparent electrode layer; the grating driving signal includes an AC driving signal provided to the first transparent electrode layer and a DC driving signal provided to the second transparent electrode layer.

[0035] This disclosure provides a driving method for a display device, the method comprising:

[0036] Obtain the image to be displayed in 3D display mode;

[0037] It drives the LCD touch display panel to display the image to be displayed, and drives the LCD grating panel to form alternating light-transmitting areas and dark areas.

[0038] In some embodiments, the display device includes: a first driver, a second driver, and a main controller;

[0039] The method further includes: the main controller sending first refresh frequency information to the first driver according to the screen to be displayed, and sending frame frequency information and raster driving information corresponding to the first refresh frequency information to the second driver; the first refresh frequency carried by the first refresh frequency information is the same as the first frequency carried by the frame frequency information;

[0040] Driving the LCD touch display panel to display the image to be displayed, specifically including:

[0041] The first driver drives the LCD touch display panel to display the image to be displayed using the first refresh frequency according to the first refresh frequency information;

[0042] The method also includes:

[0043] During the touch recognition stage, a first driving frequency that matches the first refresh frequency is used for touch recognition.

[0044] The liquid crystal grating panel is driven to form alternating light-transmitting and dark-state areas, specifically including:

[0045] The second driver adjusts the driving frequency of the raster driving information according to the frame frequency information and generates a raster driving signal with a second driving frequency; the second driving frequency is different from both the first refresh frequency and the first driving frequency.

[0046] In some embodiments, the second driver adjusts the driving frequency of the raster driving information according to the frame frequency information and generates a raster driving signal of the second driving frequency, specifically including:

[0047] The frame rate information is decoded and the decoded information is output, and the grating drive signal is generated based on the grating drive information;

[0048] The timing of the grating drive signal is adjusted according to the decoded information, and the grating drive signal of the second drive frequency is obtained. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0050] Figure 1 This is a schematic diagram of the structure of a display device provided in an embodiment of the present disclosure;

[0051] Figure 2 This is a schematic diagram of another display device provided in an embodiment of the present disclosure;

[0052] Figure 3 This is a schematic diagram of the structure of a liquid crystal grating panel provided in an embodiment of the present disclosure;

[0053] Figure 4 This is a schematic diagram of the structure of a liquid crystal touch display panel provided in an embodiment of the present disclosure;

[0054] Figure 5 This is a schematic diagram of the structure of another display device provided in an embodiment of the present disclosure;

[0055] Figure 6 A schematic diagram of the structure of a second driver provided in an embodiment of this disclosure;

[0056] Figure 7 This is a schematic flowchart of a driving method for a display device provided in an embodiment of the present disclosure. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Furthermore, the embodiments and features in the embodiments of this disclosure can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0058] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that an element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0059] It should be noted that the dimensions and shapes of the figures in the accompanying drawings do not reflect actual proportions and are intended only to illustrate the content of this disclosure. Furthermore, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0060] This disclosure provides a display device, such as... Figure 1 As shown, it includes:

[0061] Backlight module 1;

[0062] The LCD touch display panel 2 is located on the light-emitting side of the backlight module 1;

[0063] The liquid crystal grating panel 3 is located between the backlight module 1 and the liquid crystal touch display panel 2.

[0064] The display device provided in this embodiment has a liquid crystal grating panel located between the backlight module and the liquid crystal touch display panel. As a result, the liquid crystal grating panel does not shield the touch electrodes in the liquid crystal touch display panel, thus avoiding touch failure and improving the touch sensitivity and accuracy of the display device.

[0065] It should be noted that the liquid crystal grating panel is used to: form alternating light-transmitting areas and dark areas in the three-dimensional display mode, so that the light for the left and right eyes is distributed in different areas of space, so that the image for the left eye is input into the viewer's left eye through the light-transmitting area, and the image for the right eye is input into the viewer's right eye through the light-transmitting area, thereby realizing naked-eye three-dimensional display.

[0066] In some embodiments, such as Figure 1 As shown, the display device also includes:

[0067] The first polarizer 4 is located on one side of the liquid crystal grating panel 3 and the backlight module 1;

[0068] The second polarizer 5 is located between the liquid crystal grating panel 3 and the liquid crystal touch display panel 2;

[0069] The third polarizer 6 is located on the side of the LCD touch display panel 2 that is away from the LCD grating panel 3.

[0070] In practice, the first polarizer and the liquid crystal grating panel, the second polarizer and the liquid crystal grating panel, the second polarizer and the liquid crystal touch display panel, and the third polarizer and the liquid crystal touch display panel are all bonded together with optical adhesive.

[0071] In some embodiments, the display device further includes a cover plate located on the side of the third polarizer facing away from the liquid crystal touch display panel. The third polarizer and the cover plate may also be bonded together with optical adhesive.

[0072] In some embodiments, such as Figure 2 As shown, the display device also includes:

[0073] The multilayer reflective polarizer 7 is located between the first polarizer 4 and the backlight module 1.

[0074] It should be noted that multilayer reflective polarizers are formed by alternating stacking of two materials, one of which is a homogeneous medium and the other is a birefringent material. When light is incident on a multilayer reflective polarizer, it can achieve birefringence and near total internal reflection within a certain frequency range, allowing the unexposed light to be reused and improving light utilization.

[0075] The display device provided in this embodiment has a multilayer reflective polarizer disposed between the first polarizer and the backlight module. The multilayer reflective polarizer can reuse circularly polarized light emitted from the backlight module but not emitted from the multilayer reflective polarizer to improve light utilization and thereby increase the output brightness of the display device.

[0076] In some embodiments, such as Figure 3 As shown, the liquid crystal grating panel 3 includes:

[0077] The first array substrate 8 includes a first substrate 9 and a first transparent electrode layer 10 located between the first substrate 9 and the liquid crystal touch display panel 2;

[0078] The first liquid crystal layer 11 is located between the first array substrate 8 and the liquid crystal touch display panel;

[0079] The first opposing substrate 12 is located between the first liquid crystal layer 11 and the liquid crystal touch display panel, and includes a second substrate 21 and a second transparent electrode layer 13 located between the second substrate 21 and the first liquid crystal layer 11.

[0080] In practice, driving signals are applied to the first transparent electrode layer and the second transparent electrode layer to form alternating light-transmitting areas and dark areas in the liquid crystal grating panel.

[0081] In some embodiments, such as Figure 4 As shown, the LCD touch display panel includes:

[0082] The second array substrate 24 includes: a third substrate 25, a plurality of thin film transistors 26 arranged in an array on the side of the third substrate 25 away from the liquid crystal grating panel, and a plurality of pixel electrodes 34 on the side of the thin film transistors 26 away from the second substrate 25.

[0083] The second liquid crystal layer 27 is located on the side of the second array substrate 24 away from the liquid crystal grating panel;

[0084] The second opposing substrate 28 is located on the side of the second liquid crystal layer 27 away from the second array substrate 24, and includes a fourth substrate 29, a light-shielding layer 30 and a plurality of color resists 31 located between the fourth substrate 29 and the second liquid crystal layer 27; the light-shielding layer 30 includes a plurality of opening regions, and the color resists 31 are located in the opening regions.

[0085] In practical implementation, the liquid crystal touch display panel includes multiple sub-pixels. The openings in the light-shielding layer correspond one-to-one with each sub-pixel. Each sub-pixel includes a thin-film transistor and a pixel electrode, meaning the pixel electrode corresponds one-to-one with the thin-film transistor. For example, the multiple sub-pixels include red, blue, and green sub-pixels, and the corresponding color resists include: red color resist corresponding to the red sub-pixel, blue color resist corresponding to the blue sub-pixel, and green color resist corresponding to the green sub-pixel.

[0086] In some embodiments, the liquid crystal touch display panel further includes a common electrode. For example... Figure 4 As shown, the second array substrate includes a common electrode 32; for example, the common electrode 32 is located between the pixel electrode 34 and the second liquid crystal layer 27; or, the second opposing substrate includes a common electrode, which is located, for example, between the light-shielding layer and the second liquid crystal layer.

[0087] In some embodiments, the liquid crystal touch display panel further includes a plurality of touch electrodes.

[0088] In some embodiments, such as Figure 4 As shown, the common electrode 32 is reused as the touch electrode 33.

[0089] Of course, in practice, the touch electrodes can also be set up separately.

[0090] In some embodiments, such as Figure 4 As shown, the thin-film transistor 26 includes an active layer 35, a gate G, a source S, and a drain D; the second substrate 24 further includes: a first buffer layer 36 located between the third substrate 25 and the active layer 35; a gate insulating layer 37 located between the active layer 35 and the gate G; an interlayer insulating layer 38 located between the gate G and the source S and drain D; a first passivation layer 39 located between the source S and drain D and the pixel electrode 34; a second passivation layer 40 located between the pixel electrode 34 and the common electrode 32; and a first alignment layer 41 located between the common electrode 32 and the second liquid crystal layer 28; the second opposing substrate 27 further includes a second alignment layer 42 located between the light-shielding layer 30 and the second liquid crystal layer 28. The first alignment layer 41 and the second alignment layer 42 are used to align the liquid crystal molecules in the second liquid crystal layer.

[0091] It should be noted that, Figure 4 This example uses a thin-film transistor (TFT) with a top-gate structure. In practice, TFTs can also have a bottom-gate or other structures.

[0092] In some embodiments, the touch electrodes are used to receive AC drive signals.

[0093] In some embodiments, the first transparent electrode layer is used to receive AC drive signals; the second transparent electrode layer is used to receive DC drive signals.

[0094] In the display device provided in this embodiment, the first opposing substrate is closer to the liquid crystal touch display panel than the first array substrate, thereby making the second transparent electrode layer closer to the touch electrode. The second transparent electrode layer receives a DC drive signal, which avoids coupling signals when both the closely spaced second transparent electrode layer and the touch electrode receive AC signals, preventing touch failure and improving touch accuracy.

[0095] In some embodiments, such as Figure 4 As shown, the first transparent electrode layer 10 includes:

[0096] The first sub-electrode layer 14 includes a plurality of first strip electrodes 16 spaced apart;

[0097] The second sub-electrode layer 15 is located between the first sub-electrode layer 14 and the first liquid crystal layer 11, and includes a plurality of spaced second strip electrodes 17; the first strip electrodes 16 and the second strip electrodes 17 extend in the same direction, and the orthographic projection of the second strip electrodes 17 on the first substrate 9 covers the area between two adjacent first strip electrodes 16 on the orthographic projection of the first substrate 9.

[0098] The second transparent electrode layer 13 includes planar electrodes disposed across its entire surface.

[0099] In some embodiments, the materials of both the first transparent electrode layer and the second transparent electrode layer include indium tin oxide.

[0100] In some embodiments, such as Figure 4 As shown, the first array substrate 8 further includes: a first insulating layer 18 located between the first sub-electrode layer 14 and the first substrate 9; a second insulating layer 19 located between the first sub-electrode layer 14 and the second sub-electrode layer 15; and a third alignment layer 20 located on the side of the second sub-electrode layer 15 away from the first sub-electrode layer 14. The first opposing substrate 12 further includes: a third insulating layer 23 located between the second substrate 21 and the second transparent electrode layer 13; and a fourth alignment layer 22 located on the side of the second transparent electrode layer 13 away from the second substrate 21.

[0101] The display device provided in this embodiment applies a driving signal to the second transparent electrode layer, applies driving signals to a portion of the first and second strip electrodes, and does not apply driving signals to the remaining first and second strip electrodes. In this way, the liquid crystal in the areas corresponding to the first and second strip electrodes to which the driving signals are applied deflects, while the liquid crystal in the remaining areas does not deflect, forming alternating light-transmitting and dark-state areas. Furthermore, the positions of the first and second strip electrodes to which the driving signals are applied can be changed as needed, thereby changing the position of the light-transmitting areas. Thus, when the viewer's position changes, the position of the light-transmitting areas can also be adjusted accordingly, allowing the viewer to view the three-dimensional effect from different positions.

[0102] In some embodiments, the third alignment layer and the fourth alignment layer are used to align the liquid crystal molecules in the first liquid crystal layer.

[0103] In specific implementations, the liquid crystal molecules in the first liquid crystal layer can be oriented using the third and fourth alignment layers to achieve a twisted nematic (TN) arrangement. Therefore, the liquid crystal grating panel provided in this embodiment is a TN-type liquid crystal grating panel. In the first liquid crystal layer of the TN-type liquid crystal grating panel, in the unpowered state, the liquid crystal molecules are continuously twisted 90° between the first array substrate and the first opposing substrate. When a driving voltage is applied to both the first and second transparent electrode layers, the liquid crystal molecules deflect, and their long axes align perpendicular to the first array substrate.

[0104] In practical implementation, for a TN-type liquid crystal grating panel, the transmission axis of the first polarizer and the transmission axis of the second polarizer are perpendicular to each other. The first polarizer converts the incident light into linearly polarized light, which enters the first liquid crystal layer. When no driving signal is applied to the first transparent electrode layer, the liquid crystal molecules in the first liquid crystal layer do not deflect. The linearly polarized light rotates 90° after passing through the first liquid crystal layer and can pass through the second polarizer. Therefore, the area where the liquid crystal does not deflect corresponds to the transparent area. However, when a driving signal is applied to the first transparent electrode layer, the liquid crystal molecules in the first liquid crystal layer deflect. The linearly polarized light does not change its polarization direction after passing through the first liquid crystal layer and cannot pass through the second polarizer. Therefore, the area where the liquid crystal deflects corresponds to the dark state area.

[0105] In some embodiments, such as Figure 5 As shown, the display device also includes: a first driver 43 electrically connected to the liquid crystal touch display panel 2, a second driver 44 electrically connected to the liquid crystal raster panel 3, and a main controller 45 electrically connected to the first driver 43 and the second driver 44;

[0106] The main controller 45 is used to: send first refresh frequency information to the first driver 43 according to the screen to be displayed; send frame frequency information and raster driving information corresponding to the first refresh frequency information to the second driver 44; the first refresh frequency carried by the first refresh frequency information is the same as the first frequency carried by the frame frequency information.

[0107] The first driver 43 is used to: drive the liquid crystal touch display panel to display the image to be displayed using the first refresh frequency according to the first refresh frequency information; and in the touch recognition stage, use the first driving frequency that matches the first refresh frequency to perform touch recognition.

[0108] The second driver 44 is used to: adjust the driving frequency of the raster driving information according to the frame frequency information, and generate a raster driving signal with a second driving frequency; the second driving frequency is different from both the first refresh frequency and the first driving frequency.

[0109] The display device provided in this embodiment has a second driving frequency that is different from both the first refresh frequency and the first driving frequency. This allows the driving frequency of the liquid crystal raster panel to avoid the refresh frequency and touch driving frequency of the liquid crystal touch display panel, thus preventing issues such as false alarms or missed alarms caused by abnormal touch information acquisition by the first driver during the touch phase, which affect touch accuracy. Furthermore, the frame rate information sent by the main controller to the second driver carries the same frequency as the first refresh frequency information sent to the first driver. This means that even if the first refresh frequency changes, the frequency carried by the frame rate information also changes accordingly. The raster driving frequency can be dynamically changed by monitoring the first refresh frequency in real time, ensuring that the driving frequency of the liquid crystal raster panel avoids the refresh frequency and touch driving frequency of the liquid crystal touch display panel.

[0110] In practice, the ratio of the first driving frequency to the first refresh frequency is an integer. For example, the first driving frequency is twice the first refresh frequency, the first refresh frequency is 60 Hz, and the first driving frequency is 120 Hz.

[0111] In some embodiments, the first driver is a Touch and Display Driver Integration (TDDI) chip. The first driver can generate a display driving signal based on the first refresh rate information, so as to drive the liquid crystal touch display panel to display the image to be displayed using the first refresh rate; and the first driver can generate a touch driving signal with a first driving frequency based on the first refresh rate information, so as to perform touch recognition using a first driving frequency that matches the first refresh rate during the touch recognition stage.

[0112] In some embodiments, such as Figure 6 As shown, the second driver 44 includes:

[0113] The receiving circuit 46 is used to receive frame frequency information and raster driving information, decode the frame frequency information, and output the decoded information and raster driving information.

[0114] The drive signal generation circuit 47 is used to generate a grating drive signal based on the grating drive information.

[0115] The timing control circuit 48 is used to adjust the timing of the grating drive signal according to the decoded information and output the grating drive signal of the second drive frequency.

[0116] In some embodiments, the grating driving signal of the second driving frequency includes: an AC driving signal A provided to the first transparent electrode layer, and a DC driving signal B provided to the second transparent electrode layer.

[0117] In practice, the voltage of AC drive signal A is 0 volts, and the voltage of DC drive signal B is 5 volts.

[0118] In some embodiments, the timing control circuit includes:

[0119] A serial peripheral interface is used to output a grating drive signal at a second drive frequency.

[0120] It should be noted that the Serial Peripheral Interface (SPI) is a high-speed, full-duplex, synchronous communication bus. The second driver provided in this embodiment includes an SPI interface. The SPI interface can be reserved for different frequencies of raster drive signals to be programmed for different products. After the first refresh rate is fixed, the optimal second drive frequency is found by debugging according to the frame frequency signal. Finally, the raster drive signal of the second drive frequency is output through the SPI interface to other circuits in the second driver, thereby realizing the solidification of the second drive frequency.

[0121] In some embodiments, the second driving frequency is greater than the first refresh frequency and less than the first driving frequency.

[0122] In some embodiments, the difference between the second driving frequency and the first refresh frequency is greater than or equal to 10 Hz and less than or equal to 25 Hz.

[0123] In practical implementation, the first refresh rate can be switched from 60Hz to 90Hz and 120Hz, and the second driving frequency needs to be changed accordingly. For example, when the first refresh rate is 60Hz, the second driving frequency is 70Hz; when the first refresh rate is 90Hz, the second driving frequency is 115Hz; and when the first refresh rate is 120Hz, the second driving frequency is 140Hz. This allows the second driving frequency to be dynamically adjusted as the first refresh rate changes, ensuring touch accuracy.

[0124] It should be noted that the second driving frequency can be specifically set according to the first refresh frequency and the first driving frequency, as long as the second driving frequency does not interfere with the first refresh frequency and the first driving frequency.

[0125] In some embodiments, the display device further includes a first flexible circuit board and a second flexible circuit board. In a specific implementation, the first driver and the first flexible circuit board are, for example, both bonded to the second array substrate, and the first flexible circuit board is electrically connected to the main controller, which provides first refresh frequency information to the first driver through the first flexible circuit board. One end of the second flexible circuit board is, for example, bonded to the first array substrate, and the other end of the second flexible circuit board is electrically connected to the second driver, thereby the second driver provides a raster driving signal to the liquid crystal raster panel through the second flexible circuit board.

[0126] In a specific implementation, the first array substrate may further include a first connecting lead, which is electrically connected to the second flexible circuit board; the liquid crystal grating panel may further include conductive silver paste, so that the second transparent electrode layer is electrically connected to the first connecting lead through the conductive silver paste, and the DC drive signal can be transmitted to the second transparent electrode layer through the second flexible circuit board, the first connecting lead, and the conductive silver paste.

[0127] In specific implementations, the display device provided in this disclosure embodiment is any product or component with touch display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Other essential components of this display device are those that should be understood by those skilled in the art, and will not be described in detail here, nor should they be construed as limiting this disclosure.

[0128] Based on the same inventive concept, this disclosure also provides a driving method for a display device, such as... Figure 7 As shown, it includes:

[0129] S101. Obtain the screen to be displayed in the 3D display mode;

[0130] S102, drive the liquid crystal touch display panel to display the image to be displayed, and drive the liquid crystal grating panel to form alternating light-transmitting areas and dark areas.

[0131] The driving method of the display device provided in this embodiment drives the liquid crystal grating panel to form alternating light-transmitting areas and dark areas in a three-dimensional display mode, so as to separate the light of the left and right eyes into different areas in space, so that the left eye image is input into the viewer's left eye through the light-transmitting area, and the right eye image is input into the viewer's right eye through the light-transmitting area, thereby realizing naked-eye three-dimensional display.

[0132] In some embodiments, the display device includes: a first driver, a second driver, and a main controller;

[0133] The method further includes: the main controller sending first refresh frequency information to the first driver according to the screen to be displayed, and sending frame frequency information and raster driving information corresponding to the first refresh frequency information to the second driver; the first refresh frequency carried by the first refresh frequency information is the same as the first frequency carried by the frame frequency information;

[0134] Driving the LCD touch display panel to display the image to be displayed, specifically including:

[0135] The first driver drives the LCD touch display panel to display the image to be displayed using the first refresh frequency according to the first refresh frequency information;

[0136] The method also includes:

[0137] During the touch recognition stage, a first driving frequency that matches the first refresh frequency is used for touch recognition.

[0138] The liquid crystal grating panel is driven to form alternating light-transmitting and dark-state areas, specifically including:

[0139] The second driver adjusts the driving frequency of the raster driving information according to the frame frequency information and generates a raster driving signal with a second driving frequency; the second driving frequency is different from both the first refresh frequency and the first driving frequency.

[0140] The driving method for the display device provided in this disclosure uses a second driving frequency that is different from both the first refresh frequency and the first driving frequency. This allows the driving frequency of the liquid crystal raster panel to avoid the refresh frequency and touch driving frequency of the liquid crystal touch display panel, thus preventing issues such as false alarms or missed alarms caused by abnormal touch information acquisition by the first driver during the touch phase, which affect touch accuracy. Furthermore, the frame rate information sent by the main controller to the second driver carries the same frequency as the first refresh frequency information sent to the first driver. This means that even if the first refresh frequency changes, the frequency carried by the frame rate information also changes accordingly. The raster driving frequency can be dynamically changed by monitoring the first refresh frequency in real time, ensuring that the driving frequency of the liquid crystal raster panel avoids the refresh frequency and touch driving frequency of the liquid crystal touch display panel.

[0141] In some embodiments, the second driver adjusts the driving frequency of the raster driving information according to the frame frequency information and generates a raster driving signal of the second driving frequency, specifically including:

[0142] The frame rate information is decoded and the decoded information is output, and the grating drive signal is generated based on the grating drive information;

[0143] The timing of the grating drive signal is adjusted according to the decoded information, and the grating drive signal of the second drive frequency is obtained.

[0144] In summary, the display device and driving method provided in this disclosure have a liquid crystal grating panel located between the backlight module and the liquid crystal touch display panel. As a result, the liquid crystal grating panel does not shield the touch electrodes in the liquid crystal touch display panel, thus avoiding touch failure and improving the touch sensitivity and accuracy of the display device.

[0145] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0146] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. Therefore, if these modifications and variations to the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

1. A display device, wherein, include: Backlight module; A liquid crystal touch display panel is located on the light-emitting side of the backlight module; A liquid crystal grating panel is located between the backlight module and the liquid crystal touch display panel; The liquid crystal grating panel includes: The first array substrate includes a first substrate and a first transparent electrode layer located between the first substrate and the liquid crystal touch display panel; the first transparent electrode layer is used to receive AC drive signals. The first liquid crystal layer is located between the first array substrate and the liquid crystal touch display panel; A first opposing substrate, located between the first liquid crystal layer and the liquid crystal touch display panel, includes a second substrate and a second transparent electrode layer located between the second substrate and the first liquid crystal layer; the second transparent electrode layer is used to receive DC drive signals. The first transparent electrode layer includes: The first sub-electrode layer includes a plurality of first strip electrodes arranged at intervals; The second sub-electrode layer is located between the first sub-electrode layer and the first liquid crystal layer, and includes a plurality of spaced second strip electrodes; the first strip electrodes and the second strip electrodes extend in the same direction, and the orthographic projection of the second strip electrodes on the first substrate covers the orthographic projection of the area between two adjacent first strip electrodes on the first substrate. The second transparent electrode layer includes planar electrodes disposed over its entire surface.

2. The display device according to claim 1, wherein, The display device further includes: The first polarizer is located between the liquid crystal grating panel and the backlight module; The second polarizer is located between the liquid crystal grating panel and the liquid crystal touch display panel; The third polarizer is located on the side of the liquid crystal touch display panel that is away from the liquid crystal grating panel.

3. The display device according to claim 2, wherein, The display device further includes: A multilayer reflective polarizer is located between the first polarizer and the backlight module.

4. The display device according to any one of claims 1 to 3, wherein, The display device further includes: a first driver electrically connected to the liquid crystal touch display panel, a second driver electrically connected to the liquid crystal grating panel, and a main controller electrically connected to the first driver and the second driver; The main controller is configured to: send first refresh frequency information to the first driver according to the screen to be displayed; send frame frequency information and raster driving information corresponding to the first refresh frequency information to the second driver; wherein the first refresh frequency carried by the first refresh frequency information is the same as the first frequency carried by the frame frequency information. The first driver is configured to: drive the liquid crystal touch display panel to display a screen to be displayed using the first refresh frequency according to the first refresh frequency information; and perform touch recognition using a first driving frequency that matches the first refresh frequency during the touch recognition phase. The second driver is used to: adjust the driving frequency of the raster driving information according to the frame frequency information, and generate a raster driving signal with a second driving frequency; the second driving frequency is different from both the first refresh frequency and the first driving frequency.

5. The display device according to claim 4, wherein, The second driver includes: A receiving circuit is configured to receive the frame frequency information and the raster driving information, decode the frame frequency information, and output the decoded information and the raster driving information. A drive signal generation circuit is used to generate a grating drive signal based on the grating drive information. A timing control circuit is used to adjust the timing of the grating drive signal according to the decoded information and output a grating drive signal at the second drive frequency.

6. The display device according to claim 5, wherein, The timing control circuit includes: A serial peripheral interface is used to output the grating drive signal of the second drive frequency.

7. The display device according to any one of claims 5 to 6, wherein, The second driving frequency is greater than the first refresh frequency, and the second driving frequency is less than the first driving frequency.

8. The display device according to claim 7, wherein, The difference between the driving frequency of the grating driving signal and the first refresh frequency is greater than or equal to 10 Hz and less than or equal to 25 Hz.

9. The display device according to any one of claims 5 to 6, 8, wherein, The liquid crystal grating panel includes a first transparent electrode layer and a second transparent electrode layer; the grating driving signal includes an AC driving signal provided to the first transparent electrode layer and a DC driving signal provided to the second transparent electrode layer.

10. A driving method for a display device according to any one of claims 1 to 9, wherein, The method includes: Obtain the image to be displayed in 3D display mode; The liquid crystal touch display panel is driven to display the image to be displayed, and the liquid crystal grating panel is driven to form alternating light-transmitting areas and dark areas.

11. The method according to claim 10, wherein, The display device includes: a first driver, a second driver, and a main controller; The method further includes: the main controller sending first refresh frequency information to the first driver according to the screen to be displayed, and sending frame frequency information and raster driving information corresponding to the first refresh frequency information to the second driver; the first refresh frequency carried by the first refresh frequency information is the same as the first frequency carried by the frame frequency information. The process of driving the liquid crystal touch display panel to display the image to be displayed specifically includes: The first driver drives the liquid crystal touch display panel to display the image to be displayed using the first refresh frequency according to the first refresh frequency information; The method further includes: During the touch recognition stage, a first driving frequency that matches the first refresh frequency is used for touch recognition. The process of driving the liquid crystal grating panel to form alternating light-transmitting and dark-state areas specifically includes: The second driver adjusts the driving frequency of the raster driving information according to the frame frequency information and generates a raster driving signal with a second driving frequency; the second driving frequency is different from both the first refresh frequency and the first driving frequency.

12. The method according to claim 11, wherein, The second driver adjusts the driving frequency of the raster driving information according to the frame frequency information and generates a raster driving signal with a second driving frequency, specifically including: The frame rate information is decoded and the decoded information is output, and a grating drive signal is generated based on the grating drive information; The timing of the grating drive signal is adjusted according to the decoded information, and the grating drive signal of the second drive frequency is obtained.

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