Display module and display device

Abstract

The application relates to the technical field of display, and discloses a display module and a display device, the display module comprising a display panel and a peep-proof liquid crystal box; the display panel comprises a touch electrode; the peep-proof liquid crystal box comprises a first substrate, a second substrate and a first liquid crystal layer; the first substrate comprises a first substrate and a first electrode, and the first electrode is located on the side of the first substrate close to the first liquid crystal layer; the second substrate comprises a second substrate and a second electrode, and the second electrode is located on the side of the second substrate close to the first liquid crystal layer; in a peep-proof mode, the first electrode receives a first voltage signal, the second electrode receives a second voltage signal, and the first voltage signal is a direct current voltage signal; the peep-proof mode comprises a first touch stage and a first display stage; in the first touch stage, the second voltage signal is a direct current voltage signal; and in the first display stage, the second voltage signal is a square wave voltage signal. The application improves the touch effect while realizing peep-proof.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to a display module and a display device. Background Technology

[0002] With the development of display technology, display devices such as mobile phones and computers are being used more and more widely. Typically, display devices have a wide viewing angle, allowing users at different viewing angles to see the displayed information. However, in some scenarios, users may want the information displayed on the device to be hidden from other users nearby, i.e., they may want the display device to have a privacy feature.

[0003] In the existing technology, privacy can be achieved by adding a privacy LCD box; however, the installation of the privacy LCD box will affect the touch performance of the display panel. Summary of the Invention

[0004] In view of this, the present invention provides a display module and display device that improves touch control while achieving privacy protection.

[0005] This invention provides a display module, comprising: a display panel and a privacy liquid crystal cell disposed opposite to each other; the display panel includes touch electrodes; the privacy liquid crystal cell includes a first substrate, a second substrate, and a first liquid crystal layer located between the first substrate and the second substrate, the first substrate being located between the display panel and the second substrate; the first substrate includes a first substrate and a first electrode, the first electrode being located on the side of the first substrate closer to the first liquid crystal layer; the second substrate includes a second substrate and a second electrode, the second electrode being located on the side of the second substrate closer to the first liquid crystal layer; in privacy mode, the first electrode receives a first voltage signal, and the second electrode receives a second voltage signal, the first voltage signal being a DC voltage signal; the privacy mode includes a first touch stage and a first display stage; in the first touch stage, the second voltage signal is a DC voltage signal; in the first display stage, the second voltage signal is a square wave voltage signal.

[0006] Based on the same idea, the present invention also provides a display device, including the display module provided by the present invention.

[0007] Compared with the prior art, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0008] The display module provided by this invention includes a privacy mode comprising a first touch stage and a first display stage. In the first display stage, the first voltage signal is a DC voltage signal, and the second voltage signal is a square wave voltage signal. An electric field is formed between the first electrode and the second electrode. Under the influence of this electric field, the first liquid crystal molecules in the first liquid crystal layer rotate at a certain angle, thereby narrowing the viewing angle range of the display module and achieving privacy protection. Simultaneously, the second voltage signal being a square wave voltage signal effectively prevents the polarization of the first liquid crystal molecules in the first liquid crystal layer. In the first touch stage, both the first and second voltage signals are DC voltage signals. At this time, the voltage signal on the first electrode is not affected by the second voltage signal and becomes an irregular square wave voltage signal. The voltage signal on the first electrode remains a DC voltage signal, effectively reducing the influence of the voltage signal on the first electrode on the signal on the touch electrode, which is beneficial for improving the touch performance of the display module.

[0009] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0010] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0012] Figure 1 This is a planar schematic diagram of a display module provided by the present invention;

[0013] Figure 2 yes Figure 1 A cross-sectional view of the display module along A-A';

[0014] Figure 3 This invention provides a timing diagram of a display module in anti-spy mode;

[0015] Figure 4 This is a timing diagram provided by existing technology for a display module in privacy mode;

[0016] Figure 5 This is a planar schematic diagram of a third substrate in a display panel provided by the present invention;

[0017] Figure 6 yes Figure 1 Another cross-sectional view of the display module along A-A';

[0018] Figure 7 This invention provides another timing diagram for the display module in privacy mode;

[0019] Figure 8 This is a schematic diagram of a privacy-protecting liquid crystal cell in a display module provided by the present invention;

[0020] Figure 9 This invention provides another timing diagram for the display module in privacy mode;

[0021] Figure 10 This is a schematic diagram of the connection relationship of an OR gate provided by the present invention;

[0022] Figure 11 This is a schematic diagram of the planar structure of a display device provided by the present invention. Detailed Implementation

[0023] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0024] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0025] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0026] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0028] Figure 1 This is a planar schematic diagram of a display module provided by the present invention. Figure 2 yes Figure 1 A cross-sectional view of the display module along A-A'. Figure 3 This invention provides a timing diagram of a display module in privacy mode, for reference. Figures 1-3 This embodiment provides a display module, which includes a display panel 100 and a privacy LCD cell 200 disposed opposite to each other;

[0029] The display panel 100 includes touch electrodes 114;

[0030] The privacy LCD cell 200 includes a first substrate 210, a second substrate 220, and a first liquid crystal layer 230 located between the first substrate 210 and the second substrate 220. The first substrate 210 is located between the display panel 100 and the second substrate 220.

[0031] The first substrate 210 includes a first substrate 211 and a first electrode 212, wherein the first electrode 212 is located on the side of the first substrate 211 close to the first liquid crystal layer 230;

[0032] The second substrate 220 includes a second substrate 221 and a second electrode 222, with the second electrode 222 located on the side of the second substrate 221 close to the first liquid crystal layer 230.

[0033] In privacy mode, the first electrode 212 receives the first voltage signal V1, and the second electrode 222 receives the second voltage signal V2. The first voltage signal V1 is a DC voltage signal.

[0034] The privacy mode includes a first touch phase T1 and a first display phase T2;

[0035] During the first touch phase T1, the second voltage signal V2 is a DC voltage signal;

[0036] During the first display phase T2, the second voltage signal V2 is a square wave voltage signal.

[0037] Specifically, the display module provided in this embodiment includes a display panel 100 and a privacy LCD cell 200 disposed opposite to each other. Optionally, the privacy LCD cell 200 is located on the backlight side of the display panel 100, that is, the privacy LCD cell 200 is located between the backlight module and the display panel 100. In this case, the privacy LCD cell 200 can adjust the transmission direction of the light emitted from the backlight component, and the adjusted light is transmitted to the display panel 100.

[0038] It should be noted that in other embodiments of the present invention, the privacy LCD cell 200 may also be located on the light-emitting side of the display panel 100, that is, the privacy LCD cell 200 can directly control the transmission direction of the light emitted from the light-emitting side of the display panel 100. This will not be elaborated further here.

[0039] The privacy-protected liquid crystal cell 200 includes a first substrate 210, a second substrate 220, and a first liquid crystal layer 230 located between the first substrate 210 and the second substrate 220. The first substrate 210 is located between the display panel 100 and the second substrate 220. The first substrate 210 includes a first substrate 211 and a first electrode 212, with the first electrode 212 located on the side of the first substrate 211 closest to the first liquid crystal layer 230. The second substrate 220 includes a second substrate 221 and a second electrode 222, with the second electrode 222 located on the side of the second substrate 221 closest to the first liquid crystal layer 230. When no voltage signal is applied to the first electrode 212 and the second electrode 222, the first liquid crystal molecules in the first liquid crystal layer 230 maintain their initial state. When a voltage signal is applied to the first electrode 212 and the second electrode 222, the first liquid crystal molecules in the first liquid crystal layer 230 rotate by a certain angle under the action of the electric field.

[0040] Specifically, the display module has a shared mode and a privacy mode.

[0041] In the shared mode, no voltage signal is applied to the first electrode 212 and the second electrode 222, and no electric field is formed between the first electrode 212 and the second electrode 222. The first liquid crystal molecules in the first liquid crystal layer 230 remain in their initial state, that is, the first liquid crystal molecules in the first liquid crystal layer 230 remain in a wide viewing angle filtering state. The first liquid crystal molecules in the first liquid crystal layer 230 do not have an optical effect on the light transmitted in each viewing angle direction, so the light from each viewing angle direction is emitted normally from the display module, thereby the display module has a wider viewing angle range.

[0042] In privacy mode, the first electrode 212 receives a first voltage signal V1, and the second electrode 222 receives a second voltage signal V2. That is, the first voltage signal V1 is applied to the first electrode 212, and the second voltage signal V2 is applied to the second electrode 222, thereby creating an electric field between the first electrode 212 and the second electrode 222. Under the influence of this electric field, the first liquid crystal molecules in the first liquid crystal layer 230 rotate by a certain angle, thus narrowing the viewing angle range of the display module. Simultaneously, to avoid liquid crystal polarization, at least during the first display stage T2, the second voltage signal V2 is a square wave voltage signal.

[0043] The display panel 100 includes touch electrodes 114, meaning that the display panel 100 in this embodiment is a touch display panel. Therefore, the privacy mode includes a first touch phase T1 and a first display phase T2.

[0044] In the prior art, reference Figure 4 , Figure 4This is a timing diagram provided by existing technology for a display module in privacy mode. The first electrode 212 receives a first voltage signal V1', and the second electrode 222 receives a second voltage signal V2'. The first voltage signal V1' is a DC voltage signal, and the second voltage signal V2' is a square wave voltage signal. That is, during the first touch phase T1 and the first display phase T2, the second voltage signal V2' is a square wave voltage signal. The voltage signal on the first electrode 212 is affected by the second voltage signal V2', which is also a square wave voltage signal on the second electrode 222, thus causing the voltage signal on the first electrode 212 to also become an irregular square wave voltage signal. In other words, during the first touch phase T1, the voltage signal on the first electrode 212 is an irregular square wave voltage signal, which affects the signal on the touch electrode 114, thereby affecting the touch performance of the display module.

[0045] In this embodiment, the privacy mode includes a first touch stage T1 and a first display stage T2. In the first display stage T2, the first voltage signal V1 is a DC voltage signal, and the second voltage signal V2 is a square wave voltage signal. At this time, an electric field is formed between the first electrode 212 and the second electrode 222. Under the action of the electric field, the first liquid crystal molecules in the first liquid crystal layer 230 rotate at a certain angle, thereby narrowing the viewing angle range of the display module and achieving privacy. At the same time, the second voltage signal V2 is a square wave voltage signal, which can effectively prevent the polarization of the first liquid crystal molecules in the first liquid crystal layer 230.

[0046] In the first touch phase T1, the first voltage signal V1 is a DC voltage signal and the second voltage signal V2 is a DC voltage signal. At this time, the voltage signal on the first electrode 212 will not be affected by the second voltage signal V2 and become an irregular square wave voltage signal. The voltage signal on the first electrode 212 remains a DC voltage signal, which effectively reduces the influence of the voltage signal on the first electrode 212 on the signal on the touch electrode 114, which is beneficial to improving the touch effect of the display module.

[0047] Figure 5 This is a planar schematic diagram of a third substrate in a display panel provided by the present invention, for reference. Figures 1-3 and Figure 5 In some alternative embodiments, the display panel 100 includes a third substrate 110, a fourth substrate 120 and a second liquid crystal layer 130 located between the third substrate 110 and the fourth substrate 120, wherein the third substrate 110 is located between the privacy liquid crystal cell 200 and the fourth substrate 120.

[0048] The third substrate 110 includes a third substrate 111, a switch module T, a third electrode 112 and a touch electrode 114. The third electrode 112 is located on the side of the third substrate 111 close to the second liquid crystal layer 130. The switch module T and the third electrode 112 correspond one-to-one, and the switch module T and its corresponding third electrode 111 are electrically connected.

[0049] The touch electrode 114 is located on the side of the first substrate 111 near the second liquid crystal layer 130.

[0050] Specifically, in this embodiment, the display panel 100 in the display module can be a liquid crystal display panel. The display panel 100 includes a third substrate 110, a fourth substrate 120, and a second liquid crystal layer 130 located between the third substrate 110 and the fourth substrate 120. The third substrate 110 is located between the privacy-protected liquid crystal cell 200 and the fourth substrate 120. Optionally, the third substrate 110 can be understood as an array substrate, and the fourth substrate 120 can be understood as a color filter substrate including a color resist structure and a black matrix structure.

[0051] The third substrate 110 includes a third substrate 111, a switching module T, and a third electrode 112. The third electrode 112 is located on the side of the third substrate 111 closest to the second liquid crystal layer 130. The switching module T and the third electrode 112 correspond one-to-one, and the switching module T and its corresponding third electrode 111 are electrically connected. The switching module includes a thin-film transistor (TFT) for transmitting a pixel voltage signal to the electrically connected third electrode 111 in the on state. The gate of the TFT is connected to the scan line G of the display panel 100 and connected to the scan driving circuit (not shown in the figure) via the scan line G. The source of the TFT is connected to the data line D and connected to the driving chip or flexible circuit board subsequently bonded to the display panel 100 for providing driving signals via the data line D. The drain of the TFT is connected to the third electrode 111. A data voltage signal is loaded to the third electrode 111 via the data line D, so that an electric field is formed between the third electrode 111 and the common electrode to drive the second liquid crystal molecules of the second liquid crystal layer 130 to deflect. The deflection of the second liquid crystal molecules controls whether light is emitted, thereby realizing the display effect of the display panel 100. It is understood that this embodiment does not elaborate on the display principle of the display panel 100. In specific implementation, the display principle of the liquid crystal display panel in related technologies can be referred to for understanding.

[0052] Optional, continue to refer to Figure 2 A common electrode 113 can be disposed in the third substrate 110. It should be noted that, in other embodiments of the present invention, exemplarily, refer to... Figure 6 , Figure 6 yes Figure 1Another cross-sectional view of the display module along A-A' can also reuse the touch electrode 114 in the third substrate 110 as a common electrode. In this case, a common voltage signal is provided to the touch electrode 114 during the display stage, and a touch voltage signal is provided to the touch electrode 114 during the touch stage.

[0053] The touch electrode 114 is disposed in the third substrate 110, which is located between the privacy-protected liquid crystal cell 200 and the fourth substrate 120. Therefore, the distance between the touch electrode 114 and the first electrode 212 is relatively close, resulting in a greater influence of the voltage signal on the first electrode 212 on the signal on the touch electrode 114. During the first touch phase T1, both the first voltage signal V1 and the second voltage signal V2 are DC voltage signals. At this time, the voltage signal on the first electrode 212 remains a DC voltage signal, which effectively reduces the influence of the voltage signal on the first electrode 212 on the signal on the touch electrode 114, thus improving the touch performance of the display module.

[0054] Figure 7 This invention provides another timing diagram for the display module in privacy mode, see reference. Figure 1 , Figure 2 , Figure 5 and Figure 7 In some alternative embodiments, the display panel 100 further includes a driver chip 140, which is used to provide a third voltage signal V3 to the switch module T.

[0055] During the first touch phase T1, the third voltage signal V3 is a DC voltage signal;

[0056] During the first display phase T2, the third voltage signal V3 is a square wave voltage signal.

[0057] Specifically, the display panel 100 also includes a driver chip 140, which provides a third voltage signal V3 to the scan drive circuit, and then provides the third voltage signal V3 to the scan line G through the scan drive circuit, thereby providing the third voltage signal V3 to the switch module T.

[0058] In the first display stage T2, the third voltage signal V4 is a square wave voltage signal, which controls the corresponding switch module T to turn on. Then, the data voltage signal is loaded to the third electrode 111 through the data line D, so that an electric field is formed between the third electrode 111 and the common electrode to drive the second liquid crystal molecules of the second liquid crystal layer 130 to deflect. The deflection of the second liquid crystal molecules controls whether light is emitted or not, thereby realizing the display effect of the display panel 100.

[0059] During the first touch phase T1, the third voltage signal V3 is a DC voltage signal, and all switch modules T are turned off. The driver chip 140 is used to provide touch voltage signals to the touch electrodes 114, thereby realizing the touch function of the display module.

[0060] Figure 8 This is a schematic diagram of a privacy-protecting liquid crystal cell in a display module provided by the present invention. (Refer to...) Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 In some optional embodiments, the privacy LCD cell 200 further includes a privacy chip 240, which is used to transmit a first voltage signal V1 to the first electrode 212 and a second voltage signal V2 to the second electrode 222.

[0061] Specifically, the privacy LCD box 200 is also equipped with a privacy chip 240, which transmits a first voltage signal V1 to the first electrode 212 and a second voltage signal V2 to the second electrode 222. That is, the privacy chip 240 drives the privacy LCD box 200, which helps to simplify the driving difficulty of the privacy LCD box 200.

[0062] Continue to refer to Figure 1 , Figure 2 , Figure 5 , Figure 7 and Figure 8 In some alternative embodiments, the driver chip 140 is also used to form a synchronization signal SYNC based on the third voltage signal V3 and transmit the synchronization signal SYNC to the privacy chip 240.

[0063] The privacy chip 240 is used to generate a second voltage signal V2 based on the synchronization signal SYNC.

[0064] Specifically, in the display module provided in this embodiment, the privacy chip 240 drives the privacy LCD cell 200, so that the privacy chip 240 cannot distinguish between the first touch stage T1 and the first display stage T2 in the privacy mode. The driver chip 140 can form a synchronization signal SYNC based on the third voltage signal V3 and transmit the synchronization signal SYNC to the privacy chip 240. The privacy chip 240 can form a second voltage signal V2 by following the phase synchronization of the synchronization signal SYNC provided by the driver chip 140. Thus, in the privacy mode, in the first touch stage T1, the second voltage signal V2 is a DC voltage signal, and in the first display stage T2, the second voltage signal V2 is a square wave voltage signal.

[0065] Figure 9 This invention provides another timing diagram for the display module in privacy mode, see reference. Figure 1 , Figure 5 , Figure 6 , Figure 8 and Figure 9 In some alternative embodiments, the display panel 100 further includes a driver chip 140, which is used to provide a fourth voltage signal V4 to the touch electrode 114.

[0066] During the first touch phase T1, the fourth voltage signal V4 is a high-level signal;

[0067] During the first display phase T2, the fourth voltage signal V5 is a low-level signal.

[0068] Specifically, the display panel 100 also includes a driver chip 140. In the first touch phase T1, the fourth voltage signal V4 is a high-level signal, meaning the driver chip 140 provides a high-level signal to the touch electrode 114, i.e., the driver chip 140 provides a touch voltage signal to the touch electrode 114, thereby realizing the touch function of the display module. In the first display phase T2, the fourth voltage signal V5 is a low-level signal, meaning the driver chip 140 provides a low-level signal to the touch electrode 114, i.e., the driver chip 140 provides a common voltage signal to the touch electrode 114, thereby realizing the display function of the display module.

[0069] Figure 10 This is a schematic diagram of the connection relationship of an OR gate provided by the present invention. (Continue referring to...) Figure 1 , Figure 5 , Figure 6 , Figure 8 , Figure 9 and Figure 10 In some alternative embodiments, the display module further includes an OR gate 300;

[0070] The driver chip 140 is used to input a fourth voltage signal V4 to the first input terminal of the OR gate 300;

[0071] The privacy LCD box 200 also includes a privacy chip 240, which is used to input a fifth voltage signal V5 to the second input terminal of the OR gate 300. In the privacy mode, the fifth voltage signal V5 is a square wave voltage signal.

[0072] The output of OR gate 300 is electrically connected to the second electrode 222 and is used to transmit the second voltage signal V2 to the second electrode 222.

[0073] Specifically, the display module also includes an OR gate 300, and the display panel 100 also includes a driver chip 140. The driver chip 140 inputs a fourth voltage signal V4 to the first input terminal of the OR gate 300. In the first touch phase T1, the fourth voltage signal V4 is a high-level signal, and in the first display phase T2, the fourth voltage signal V5 is a low-level signal. The privacy-protected LCD cell 200 also includes a privacy chip 240. The privacy chip 240 inputs a fifth voltage signal V5 to the second input terminal of the OR gate 300. In the privacy mode, the fifth voltage signal V5 is a square wave voltage signal, so the output terminal of the OR gate 300 can output a second voltage signal V2. In the first touch phase T1, the second voltage signal V2 is a DC voltage signal, and in the first display phase T2, the second voltage signal V2 is a square wave voltage signal. The output terminal of the OR gate 300 is electrically connected to the second electrode 222, thereby enabling the output of the second voltage signal V2 to the second electrode 222.

[0074] Continue to refer to Figure 1 , Figure 5 , Figure 6 , Figure 8 , Figure 9 and Figure 10 In some alternative embodiments, the display module includes a circuit board (not shown), or the gate 300 is disposed in the circuit board.

[0075] Specifically, a circuit board can be set in the display module. The circuit board is electrically connected to the driver chip 140 and the privacy chip 240. Thus, the OR gate 300 can be set in the circuit board, so that the first input terminal of the OR gate 300 is electrically connected to the driver chip 140, and the driver chip 140 inputs a fourth voltage signal V4 to the first input terminal of the OR gate 300. The second input terminal of the OR gate 300 is electrically connected to the privacy chip 240, and the privacy chip 240 inputs a fifth voltage signal V5 to the second input terminal of the OR gate 300.

[0076] Continue to refer to Figure 7 In some alternative embodiments, the potential of the second voltage signal V2 when it switches from the first display stage T2 to the first touch stage T1 is the same as its potential during the first touch stage T1.

[0077] Specifically, the potential of the second voltage signal V2 when it switches from the first display stage T2 to the first touch stage T1 is the same as its potential in the first touch stage T1. That is, before entering the first touch stage T1, the second voltage signal V2 has already switched to a DC voltage signal. Therefore, the second voltage signal V2 is a DC voltage signal throughout the first touch stage T1, and there is no switching of square wave voltage signal. This effectively reduces the influence of the voltage signal on the first electrode 212 on the signal on the touch electrode 114, which is beneficial to improving the touch effect of the display module.

[0078] This embodiment provides a display device, including the display module described above.

[0079] Please refer to Figure 11 , Figure 11 This is a schematic diagram of the planar structure of a display device provided by the present invention. Figure 11 The provided display device 1000 includes a display module 400, wherein the display module is the display module 400 provided in any of the above embodiments of the present invention. Figure 11 This embodiment uses a mobile phone as an example to illustrate the display device 1000. It is understood that the display device provided in this embodiment can be any other display device with display function, such as a computer, television, or vehicle-mounted display device; this invention does not impose specific limitations on this. The display device provided in this embodiment has the beneficial effects of the display module provided in this embodiment. For details, please refer to the specific descriptions of the display module in the above embodiments; these will not be repeated here.

[0080] As can be seen from the above embodiments, the display module and display device provided by the present invention achieve at least the following beneficial effects:

[0081] The display module provided by this invention includes a privacy mode comprising a first touch stage and a first display stage. In the first display stage, the first voltage signal is a DC voltage signal, and the second voltage signal is a square wave voltage signal. An electric field is formed between the first electrode and the second electrode. Under the influence of this electric field, the first liquid crystal molecules in the first liquid crystal layer rotate at a certain angle, thereby narrowing the viewing angle range of the display module and achieving privacy protection. Simultaneously, the second voltage signal being a square wave voltage signal effectively prevents the polarization of the first liquid crystal molecules in the first liquid crystal layer. In the first touch stage, both the first and second voltage signals are DC voltage signals. At this time, the voltage signal on the first electrode is not affected by the second voltage signal and becomes an irregular square wave voltage signal. The voltage signal on the first electrode remains a DC voltage signal, effectively reducing the influence of the voltage signal on the first electrode on the signal on the touch electrode, which is beneficial for improving the touch performance of the display module.

[0082] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display module, characterized in that, include: The display panel and privacy LCD box are set opposite to each other; The display panel includes touch electrodes; The privacy-protected LCD cell includes a first substrate, a second substrate, and a first liquid crystal layer located between the first substrate and the second substrate, wherein the first substrate is located between the display panel and the second substrate; The first substrate includes a first substrate and a first electrode, wherein the first electrode is located on the side of the first substrate close to the first liquid crystal layer; The second substrate includes a second substrate and a second electrode, wherein the second electrode is located on the side of the second substrate closer to the first liquid crystal layer; In privacy mode, the first electrode receives a first voltage signal, the second electrode receives a second voltage signal, and the first voltage signal is a DC voltage signal; The privacy mode includes a first touch phase and a first display phase; During the first touch phase, the second voltage signal is a DC voltage signal; During the first display phase, the second voltage signal is a square wave voltage signal.

2. The display module according to claim 1, characterized in that, The display panel includes a third substrate, a fourth substrate, and a second liquid crystal layer located between the third substrate and the fourth substrate, wherein the third substrate is located between the privacy liquid crystal cell and the fourth substrate; The third substrate includes a third substrate, a switch module, a third electrode, and the touch electrode. The third electrode is located on the side of the third substrate close to the second liquid crystal layer. The switch module and the third electrode correspond one-to-one, and the switch module and its corresponding third electrode are electrically connected. The touch electrode is located on the side of the first substrate closer to the second liquid crystal layer.

3. The display module according to claim 2, characterized in that, The display panel also includes a driver chip, which is used to provide a third voltage signal to the switching module; During the first touch phase, the third voltage signal is a DC voltage signal; During the first display phase, the third voltage signal is a square wave voltage signal.

4. The display module according to claim 3, characterized in that, The privacy-protected LCD cell also includes a privacy chip, which is used to transmit the first voltage signal to the first electrode and the second voltage signal to the second electrode.

5. The display module according to claim 4, characterized in that, The driver chip is also used to generate a synchronization signal based on the third voltage signal and transmit the synchronization signal to the privacy chip; The privacy chip is used to generate the second voltage signal based on the synchronization signal.

6. The display module according to claim 2, characterized in that, The display panel also includes a driver chip, which is used to provide a fourth voltage signal to the touch electrodes; During the first touch phase, the fourth voltage signal is a high-level signal; During the first display phase, the fourth voltage signal is a low-level signal.

7. The display module according to claim 6, characterized in that, The display module also includes an OR gate; The driver chip is used to input the fourth voltage signal to the first input terminal of the OR gate; The privacy-protected LCD box also includes a privacy chip, which is used to input a fifth voltage signal to the second input terminal of the OR gate. In the privacy mode, the fifth voltage signal is a square wave voltage signal. The output of the OR gate is electrically connected to the second electrode and is used to transmit the second voltage signal to the second electrode.

8. The display module according to claim 7, characterized in that, The display module includes a circuit board, and the OR gate is disposed in the circuit board.

9. The display module according to claim 1, characterized in that, The potential of the second voltage signal when it switches from the first display stage to the first touch stage is the same as its potential during the first touch stage.

10. A display device, characterized in that, The display device includes the display module according to any one of claims 1-9.

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