Display device and driving method therefor

Abstract

Disclosed in embodiments of the present disclosure are a display device and a driving method therefor. The display device comprises: a cover plate, comprising a display area and a peripheral area; a touch display screen, arranged on a non-touch surface of the cover plate and arranged in the display area, the touch display screen being used for displaying a virtual control in a specific area of the display area; a peep-proof structure, arranged on the side of the touch display screen away from the cover plate and arranged in at least part of the display area, the peep-proof structure being driven by a control signal to enable the at least part of the display area to be in a peep-proof state; a piezoelectric device, arranged on the non-touch surface of the cover plate and arranged in the peripheral area, the piezoelectric device being driven by an excitation signal to deform to drive the cover plate to resonate; and a controller, separately connected to the touch display screen, the peep-proof structure, and the piezoelectric device, the controller being used for, according to the detected type of the virtual control touched by a user, sending the excitation signal to the piezoelectric device, and sending the control signal to the peep-proof structure.

Description

Display device and driving method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on May 22, 2023, with application number 202310579365.3 and application name “A display device and its driving method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the field of tactile feedback technology, and in particular to a display device and a driving method thereof. Background Art

[0004] Haptics is a key area of ​​current technological development. Specifically, haptics enables devices to interact with the human body through touch.

[0005] Summary of the Invention

[0006] The present disclosure provides a display device and a driving method thereof, the specific scheme of which is as follows:

[0007] An embodiment of the present disclosure provides a display device, including:

[0008] a cover plate, comprising a display area and a peripheral area;

[0009] A touch screen display is provided on the non-touch surface of the cover plate and is provided in the display area, and the touch screen display is used to display virtual controls in a specific area of ​​the display area;

[0010] an anti-peeping structure, disposed on a side of the touch display screen facing away from the cover plate and disposed within at least a portion of the display area, the anti-peeping structure being configured to place at least a portion of the display area in an anti-peeping state under the drive of a control signal;

[0011] a piezoelectric device, disposed on the non-touch surface of the cover plate and in the peripheral area, the piezoelectric device being configured to deform under the drive of an excitation signal to drive the cover plate to resonate;

[0012] The controller is connected to the touch display screen, the anti-peeping structure and the piezoelectric device respectively. The controller is used to send the excitation signal to the piezoelectric device and the control signal to the anti-peeping structure according to the type of user touching the virtual control detected.

[0013] In one possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the virtual control is a click button, and the controller is used to send the control signal to the anti-peeping structure when detecting that the user touches the click button, so as to control the anti-peeping state of the display area to be on or off.

[0014] In one possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the virtual control is a sliding bar, and the controller is used to send the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in an off state when the user is detected touching the side end of the sliding bar; and the controller is used to send the control signal to the anti-peeping structure to control the area of ​​the display area in the anti-peeping state to gradually increase when the user is detected sliding along the extension direction of the sliding bar.

[0015] In one possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the virtual control is a sliding bar, and the controller is used to send the control signal to the anti-peeping structure when detecting that the user touches the side end of the sliding bar to control the anti-peeping state of the display area to be in an off state; the controller is used to send the control signal to the anti-peeping structure when detecting that the user slides along the extension direction of the sliding bar to control the visual area angle of the display area to gradually decrease.

[0016] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the controller is configured to apply an excitation signal with a gradually increasing frequency to the piezoelectric device when a user is detected sliding along an extension direction of the sliding bar.

[0017] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the controller is configured to apply an excitation signal with a gradually increasing voltage peak to the piezoelectric device when a user is detected sliding along an extension direction of the sliding bar.

[0018] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the sliding bar is a horizontal sliding bar or a vertical sliding bar.

[0019] In one possible implementation, in the display device provided in an embodiment of the present disclosure, the touch screen display is a vehicle-mounted display screen, the touch screen display spans from the vehicle's center console to the right A-pillar, the display area includes a first display area and a second display area, the first display area is close to the center console, and the second display area is close to the right A-pillar;

[0020] The first display area is used to display the virtual controls, the second display area is used to display entertainment information, and the controller is used to control the anti-peeping state of the second display area through the virtual controls.

[0021] In one possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the touch display screen also spans to the left A-pillar, and the display area also includes a third display area located on the side of the first display area away from the second display area, and the third display area is used to display vehicle operation information and navigation information.

[0022] In a possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the touch screen is a vehicle-mounted display, and the number of the touch screen is two, wherein the first touch screen is arranged in a position directly opposite the co-pilot in the vehicle, and the second touch screen is arranged on the center console in the vehicle or in the central area of ​​the steering wheel in the vehicle, the first touch screen is provided with the anti-peep structure, the peripheral area of ​​the second touch screen is provided with the piezoelectric device, and the second touch screen is used to display the virtual control.

[0023] In a possible implementation, the above-mentioned display device provided in the embodiment of the present disclosure further includes a backlight module arranged on the side of the anti-peep structure away from the cover plate, and a supporting back plate arranged on the side of the backlight module away from the cover plate; the supporting back plate is connected to the cover plate, and the piezoelectric device is arranged on the cover plate outside the supporting back plate.

[0024] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the controller includes a host computer, a control board, and a signal amplification circuit; wherein,

[0025] The host computer is used to send a corresponding trigger signal to the control panel according to the type of the virtual control touched by the user detected;

[0026] The control board is used to call the corresponding excitation signal according to the trigger signal, and load the excitation signal to the piezoelectric device through the signal amplification circuit, and at the same time send the control signal to the anti-peeping structure according to the trigger signal.

[0027] Accordingly, an embodiment of the present disclosure further provides a method for driving a display device, for driving the above-mentioned display device provided by an embodiment of the present disclosure, the driving method comprising:

[0028] A user touches the virtual control;

[0029] The controller loads an excitation signal to the piezoelectric device according to the type of the virtual control touched by the user, drives the piezoelectric device to deform, and enables the touch display screen to provide tactile feedback. At the same time, the controller sends the control signal to the anti-peeping structure to put at least part of the display area into an anti-peeping state.

[0030] In a possible implementation, in the driving method provided in the embodiment of the present disclosure, an excitation signal is applied to the piezoelectric device according to the type of the virtual control touched by the user, specifically:

[0031] The host computer detects the type of the virtual control touched by the user and sends a corresponding trigger signal to the control panel;

[0032] The control board calls a corresponding excitation signal according to the trigger signal, and loads the excitation signal to the piezoelectric device through the signal amplification circuit.

[0033] In a possible implementation, in the above-mentioned driving method provided in an embodiment of the present disclosure, the virtual control is a click button. When the host computer detects that the user touches the click button, the control panel sends the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be on or off.

[0034] In one possible implementation, in the above-mentioned driving method provided in an embodiment of the present disclosure, the virtual control is a sliding bar. When the host computer detects that the user touches the side end of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in an off state; when the host computer detects that the user slides along the extension direction of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the area of ​​the display area in the anti-peeping state to gradually increase.

[0035] In one possible implementation, in the above-mentioned driving method provided in an embodiment of the present disclosure, the virtual control is a sliding bar. When the host computer detects that the user touches the side end of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in a closed state; when the host computer detects that the user slides along the extension direction of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the visible area angle of the display area to gradually decrease.

[0036] In a possible implementation, in the driving method provided in the embodiment of the present disclosure, when the host computer detects that the user slides along the extension direction of the sliding bar, the control board applies an excitation signal with gradually increasing frequency to the piezoelectric device.

[0037] In a possible implementation, in the driving method provided in the embodiment of the present disclosure, when the host computer detects that the user slides along the extension direction of the sliding bar, the control board applies an excitation signal with a gradually increasing voltage peak to the piezoelectric device. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] FIG1 is a schematic cross-sectional view of a display device provided by an embodiment of the present disclosure;

[0039] FIG2 is a schematic plan view of a display device provided by an embodiment of the present disclosure;

[0040] FIG3 is a schematic diagram showing the connection relationship between components in a display device provided by an embodiment of the present disclosure;

[0041] FIG4 is a schematic diagram of arranging a touch screen display in the center area of ​​a vehicle-mounted steering wheel;

[0042] FIG5 is a schematic diagram of a touch screen display that is a wide screen spanning from the center console to the right A-pillar in the vehicle;

[0043] FIG6 is a schematic diagram of a wide screen touch screen display extending from the left A-pillar to the right A-pillar in the vehicle;

[0044] FIG7A is a schematic diagram showing a virtual control being a click button;

[0045] FIG7B is a schematic diagram showing a virtual control as a vertical slider;

[0046] FIG7C is a schematic diagram showing a virtual control being a horizontal slider;

[0047] FIG8 is a schematic diagram of setting a click button in the first display area of ​​FIG6;

[0048] FIG9 is a schematic diagram of setting a horizontal sliding bar in the first display area of ​​FIG6 ;

[0049] FIG. 10 is a schematic diagram of setting a vertical sliding bar in the first display area of ​​FIG. 6 . DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions 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. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. 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.

[0051] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words “include” or “comprise” and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words “connect” or “connected” and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Inside”, “outside”, “upper”, “lower”, etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0052] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0053] Screens are users' windows to external information, and in-vehicle interiors will increasingly incorporate integrated displays. These displays primarily display vehicle operating information, navigation information, controls for air conditioning and seats, and information for the passenger's entertainment. However, traditional in-vehicle displays lack privacy protection, allowing them to be viewed from the side. This allows the driver to see the information displayed on the passenger's screen, significantly impacting driving safety.

[0054] Therefore, how to design an anti-side-viewing vehicle display screen with integrated tactile feedback function is a problem that needs to be solved urgently by those skilled in the art.

[0055] In view of this, and to solve the above technical problems, an embodiment of the present disclosure provides a display device, as shown in Figures 1 to 3, where Figure 1 is a schematic cross-sectional view of the display device, Figure 2 is a schematic plan view of the display device, and Figure 3 is a schematic diagram of the connection relationship between various components in the display device. The display device includes:

[0056] Cover plate 1, including display area AA and peripheral area BB;

[0057] A touch screen display 2 is provided on the non-touch surface of the cover plate 1 and is provided in the display area AA. The touch screen display 2 is used to display virtual controls in a specific area of ​​the display area AA.

[0058] The anti-peeping structure 3 is provided on the side of the touch display screen 2 facing away from the cover plate 1 and is provided in at least a portion of the display area AA. The anti-peeping structure 3 is used to put at least a portion of the display area AA in an anti-peeping state under the drive of the control signal;

[0059] The piezoelectric device 4 is provided on the non-touch surface of the cover plate 1 and in the peripheral area BB. The piezoelectric device 4 is configured to deform under the drive of an excitation signal to drive the cover plate 1 to resonate.

[0060] The controller 5 is connected to the touch display screen 2, the anti-peeping structure 3 and the piezoelectric device 4 respectively. The controller 5 is used to send an excitation signal to the piezoelectric device 5 and a control signal to the anti-peeping structure 3 according to the type of virtual control touched by the user detected.

[0061] The display device provided in the embodiments of the present disclosure implements an anti-peeping structure in the display area to achieve an anti-peeping function for the touch screen display. Furthermore, a piezoelectric device in the peripheral area enables tactile feedback for the touch screen display. When a user touches a virtual control, an excitation signal is sent to the piezoelectric device based on the type of virtual control to achieve tactile feedback. Simultaneously, a control signal is sent to the anti-peeping structure based on the virtual control to control the anti-peeping state of the structure. Therefore, the embodiments of the present disclosure provide an anti-peeping display device with integrated tactile feedback.

[0062] Liquid crystal displays (LCDs) are a type of flat-panel display. Their advantages include low power consumption, compact size, and low radiation, making them a relatively mature display. Currently, LCDs are the primary form of in-vehicle display device. This embodiment of the present disclosure uses an LCD as an example to illustrate the principle of integrating tactile feedback and privacy protection functions in the display device provided by this embodiment. Of course, the display device provided by this embodiment is not limited to LCDs or in-vehicle displays.

[0063] In a specific implementation, the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figure 1, also includes a backlight module 5 arranged on the side of the anti-peeping structure 3 facing away from the cover plate 1, and a supporting back plate 6 arranged on the side of the backlight module 5 facing away from the cover plate 1; the supporting back plate 6 is connected to the cover plate 1, and the piezoelectric device 4 is arranged on the cover plate 1 outside the supporting back plate 6; wherein, the cover plate 1 and the touch display screen 2 can be connected by optical glue 7, and the touch display screen 2 and the anti-peeping structure 3 can be connected by optical glue 8.

[0064] Optionally, as shown in FIG1 , the touch display screen 2 may be an incell structure or an oncell structure, which is the same as the structure of a liquid crystal touch display screen in the prior art and will not be described in detail in this disclosure.

[0065] In a specific implementation, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in FIG3 , the controller 5 includes a host computer 51 , a control board 52 and a signal amplifying circuit 53 ; wherein,

[0066] The host computer 51 is configured to send a corresponding trigger signal to the control panel 52 based on the type of virtual control detected by the user. Specifically, when the user touches a specific area of ​​the interface within the display area AA in FIG2 , the host computer 51 can detect that the user's finger has touched the corresponding virtual control through the touch layer within the touch display screen 2 and then send a corresponding trigger signal to the control panel 52.

[0067] The control board 52 is used to call the corresponding excitation signal according to the trigger signal, and load the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53, and at the same time send a control signal to the anti-peeping structure 3 according to the trigger signal; specifically, the control board 52 calls the corresponding excitation signal (tactile waveform) according to the trigger signal, and loads the excitation signal (AC voltage signal) to the piezoelectric device 4 (actuator) through the signal amplification circuit 53, the piezoelectric device 4 deforms, and drives the cover 1 to resonate, thereby generating corresponding tactile feedback, and at the same time the control board 52 sends a control signal to the anti-peeping structure 3 according to the trigger signal to control the anti-peeping state of the anti-peeping structure.

[0068] In a specific implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figures 1 and 2, the touch screen display 2 is a vehicle-mounted display. When the touch screen display 2 has only a single display area AA, the number of touch screen displays 2 in the vehicle can be more than one, for example, two, wherein the first touch screen display 2 can be set in a position directly opposite the co-pilot in the vehicle, that is, the first touch screen display 2 is used to display the co-pilot entertainment information, and the first touch screen display 2 is provided with an anti-peeping structure 3; the second touch screen display 2 can be set on the center console in the vehicle or in the center area of ​​the steering wheel in the vehicle, the display area of ​​the second touch screen display 2 can be used to display virtual controls and a piezoelectric device 4 is provided in its surrounding area, and the second touch screen display 2 is used to control the anti-peeping function of the first touch screen display 2 through virtual controls and simultaneously realize the tactile feedback function. For example, as shown in Figure 4, the second touch screen display 2 is set in the center area of ​​the steering wheel in the vehicle as an example.

[0069] In a specific implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in FIG1 and FIG5 , the touch display screen 2 may be a vehicle-mounted display screen, and the touch display screen 2 may be a wide screen spanning from the center console in the vehicle to the right A-pillar, and the display area AA includes a first display area A1 and a second display area A2, wherein the first display area A1 is close to the center console, and the second display area A2 is close to the right A-pillar; wherein,

[0070] The first display area A1 can be used to display virtual controls, and can also display virtual control operations such as air conditioning and seats; the second display area A2 can be used to display entertainment information, and the controller 5 is used to control the anti-peeping status of the second display area A2 through the virtual controls displayed in the first display area A1.

[0071] In a specific implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figures 1 and 6, the touch display screen 2 can also span to the left A-pillar, so that the touch display screen 2 is a wider display screen, and the display area AA can also include a third display area A3 located on the side of the first display area A1 away from the second display area A2. The third display area A3 can be used to display vehicle operation information and navigation information, etc.

[0072] Specifically, taking the touch display screen 2 shown in Figure 6 including the third display area A3, the first display area A1 and the second display area A2 as an example, considering the driving safety of the driver, the second display area A2 needs to realize the side anti-peeping function through the anti-peeping structure 3. The side anti-peeping function can be controlled by the virtual control displayed in the first display area A1, and the first display area A1 and the second display area A2 can integrate tactile feedback functions to enhance the tactile experience of human-computer interaction.

[0073] Optionally, depending on the actual touch operation, the virtual control can be, but is not limited to, a click button and a slider. The slider can be divided into a vertical slider and a horizontal slider. Specifically, as shown in FIG7A , the virtual control is a click button; as shown in FIG7B , the virtual control is a vertical slider; and as shown in FIG7C , the virtual control is a horizontal slider.

[0074] In a specific implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figures 3 and 8, the virtual control displayed in the first display area A1 is a click button, and the controller 5 is used to send a control signal to the anti-peeping structure 3 when detecting that the user touches the click button to control the anti-peeping state of the display area AA to be on or off. Specifically, when a touch-click button operation is performed on the interface in the first display area A1, the upper computer 51 detects that the user's finger touches the corresponding button through the touch layer in the touch display screen 2, and then sends a click button trigger signal to the control panel 52. The control panel 52 calls the click button tactile waveform according to the click button trigger signal, and applies the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The piezoelectric device 4 deforms and drives the cover 1 to vibrate, thereby realizing corresponding tactile feedback. At the same time, the control panel 52 controls the anti-peeping state of the anti-peeping structure 3 according to the click button trigger signal. For example, when the click button (On) position is touched, the anti-side peeping function of the second display area A2 is turned on. At this time, the driver cannot view the content displayed in the second display area A2; when the click button (Off) position is touched again, the corresponding excitation signal is applied to the piezoelectric device 4 to realize tactile feedback, and the anti-side peeping function of the second display area A2 is turned off. At this time, the driver can view the content displayed in the second display area A2.

[0075] In a specific implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figures 3 and 9, the virtual control displayed in the first display area A1 is a horizontal sliding bar, and the controller 5 is used to send a control signal to the anti-peeping structure 3 when the user is detected touching the side end (for example, the left end) of the sliding bar, so as to control the anti-peeping state of the display area (for example, the second display area A2) to be in the off state, that is, the second display area A2 does not have the anti-peeping function; the controller 5 is used to send a control signal to the anti-peeping structure 3 when the user is detected sliding along the extension direction of the sliding bar (for example, sliding to the right), so as to control the area of ​​the display area (second display area A2) in the anti-peeping state to gradually increase (for example, the shaded part represents the area in the anti-peeping state). Specifically, when a user's finger touches the left end of the horizontal slider in the first display area A1, the host computer 51 detects the user's finger touching the slider through the touch layer within the touch screen 2, and then sends a trigger signal for left and right sliding to the control panel 52. The control panel 52 calls the left and right sliding tactile waveform based on the left and right sliding trigger signal, and sends the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The piezoelectric device 4 deforms and drives the cover 1 to vibrate. When the finger begins to slide to the right, the tactile sensation of the slider can be felt. For example, when the finger is at the left end of the slider, the second display area A2 does not have the anti-peeping function. When the finger slides to the right to the 20% position, the anti-peeping function of the shaded area with a width of 20% on the left side of the second display area A2 in Figure 9 is turned on, and the driver cannot see the content displayed in the left 20% width area. The anti-peeping function of the right 80% width area is turned off, and the driver can see the content of the right 80% width area.

[0076] It should be noted that the above Figure 9 shows that when the finger touches the left end of the horizontal sliding bar, the host computer 51 sends a trigger signal for sliding left and right to the control board 52. Of course, it can also be when the finger touches the left end of the sliding bar and the finger starts to slide to the right. At this time, the host computer 51 sends a trigger signal for sliding left and right to the control board 52, and the subsequent anti-peeping process is the same.

[0077] Of course, the virtual control displayed in the first display area A1 in Figure 9 can also be a vertical sliding bar. When the user touches the bottom of the vertical sliding bar, the anti-peeping state of the second display area A2 is controlled to be in the off state. When the user slides along the extension direction of the sliding bar (for example, sliding upward), the area of ​​the second display area A2 in the anti-peeping state gradually increases.

[0078] In specific implementation, when the horizontal sliding bar shown in FIG9 is used to control the anti-peeping state of the second display area A2, the frequency of the excitation signal can be changed according to the position change of the finger sliding left and right to indicate the change of the anti-peeping area. For example, when a finger touches the left end of the slider, the upper computer 51 detects that the finger touches the slider by touching the touch layer in the touch display screen, and then sends a trigger signal for left and right sliding to the control board 52. The control board 52 calls the left and right sliding tactile waveform according to the trigger signal, for example, the frequency of the waveform is f1, and applies the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The piezoelectric device 4 deforms and drives the cover 1 to vibrate. When the finger starts to slide to the right, the tactile sensation of the slider can be felt. In the present disclosure, an excitation signal with a gradually increasing frequency is loaded to the piezoelectric device 4. For example, when the finger slides to the right end, the frequency of the excitation signal is f2, f2≠f1; when the finger is at the left end of the slider, the anti-peeping function of the second display area A2 is turned off and does not have the anti-peeping function; when the finger starts to slide to the right, the anti-peeping area (shaded area) gradually increases, and as the frequency of the excitation signal gradually increases, the tactile sensation of the finger touching the slider gradually increases. Therefore, the change in the anti-peeping area can be prompted by the gradual increase in the loaded frequency.

[0079] In a specific implementation, when the horizontal sliding bar shown in FIG9 is used to control the anti-peeping state of the second display area A2, the voltage peak of the excitation signal can also be changed according to the change in the position of the finger sliding left and right to indicate the change in the anti-peeping area. For example, when the finger touches the left end of the sliding bar, the upper computer 51 detects the finger touching the sliding bar through the touch layer in the touch display screen, and then sends a trigger signal for sliding left and right to the control board 52. The control board 52 calls the tactile waveform of sliding left and right according to the trigger signal, for example, the voltage peak of the waveform is A1, and applies the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The deformation of the piezoelectric device 4 drives the cover plate 1 to vibrate. When the finger starts to slide to the right, the tactile sensation of the sliding bar can be felt. In addition, the present disclosure applies an excitation signal with a gradually increasing voltage peak to the piezoelectric device 4. For example, when the finger slides to the right end, the voltage peak is A2, and A2≠A1. When the finger is at the left end of the slider, the anti-peeping function of the second display area A2 is turned off and does not have the anti-peeping function; when the finger starts to slide to the right, the anti-peeping area (shaded area) gradually increases, and as the voltage peak of the excitation signal gradually increases, the tactile sensation of the finger touching the slider gradually increases, so the change in the anti-peeping area can be prompted by the gradual increase in the loaded voltage peak.

[0080] In a specific implementation, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figures 3 and 10, the virtual control displayed in the first display area A1 is a longitudinal sliding bar, and the controller 5 is used to send a control signal to the anti-peeping structure 3 when the user is detected touching the side end (for example, the bottom end) of the sliding bar, so as to control the anti-peeping state of the display area (for example, the second display area A2) to be in the off state, that is, the second display area A2 does not have an anti-peeping function; the controller 5 is used to send a control signal to the anti-peeping structure 3 when the user is detected sliding along the extension direction of the sliding bar (for example, sliding upward), so as to control the visible area angle θ of the display area (second display area A2) to gradually decrease. When the angle between the user's line of sight and the normal of the touch display screen 2 (that is, θ) exceeds the visible angle, the content displayed on the screen cannot be seen. Specifically, when a user's finger touches the bottom of the vertical slider in the first display area A1, the host computer 51 detects the user's finger touching the slider through the touch layer in the touch screen 2, and then sends a trigger signal for up and down sliding to the control panel 52. The control panel 52 calls the up and down sliding tactile waveform based on the trigger signal, and sends the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The piezoelectric device 4 deforms and drives the cover 1 to vibrate. When the finger begins to slide upward, the user can feel the tactile sensation of the slider. For example, when the finger is at the bottom of the slider, the visible area angle θ of the second display area A2 is 90°, and the second display area A2 does not have an anti-peeping function. As the finger begins to slide upward, the visible area angle θ gradually decreases. For example, when the finger slides to 50% of the slider height, the visible area angle θ is 45°. At this time, if the angle between the user's line of sight and the normal of the touch screen 2 is within the range of ±45°, the user can see the content displayed in the second display area A2. When the finger slides to a position greater than 50% of the height of the slider, the angle of the visible area is less than 45°. At this time, when the angle between the line of sight and the screen normal is less than ±45°, the driver cannot see the screen content.

[0081] It should be noted that the above Figure 10 shows that when the finger touches the bottom of the vertical sliding bar, the upper computer 51 sends a trigger signal for sliding up and down to the control board 52. Of course, it can also be when the finger touches the bottom of the sliding bar and the finger starts to slide upward. At this time, the upper computer 51 sends a trigger signal for sliding up and down to the control board 52, and the subsequent anti-peeping process is the same.

[0082] Of course, the virtual control displayed in the first display area A1 in Figure 10 can also be a horizontal sliding bar. When the user touches the left end of the vertical sliding bar, the anti-peeping state of the second display area A2 is controlled to be in the off state. When the user slides along the extension direction of the sliding bar (for example, sliding to the right), the visible area angle θ of the second display area A2 is controlled to gradually decrease. When the angle between the user's line of sight and the normal of the touch display screen 2 (i.e. θ) exceeds the visible angle, the content displayed on the screen cannot be seen.

[0083] In specific implementation, when the longitudinal sliding bar shown in FIG10 is used to control the anti-peeping state of the second display area A2, the frequency of the excitation signal can also be changed according to the position change of the finger sliding up and down to prompt the change of the angle of the anti-peeping visual area. For example, when the finger touches the bottom of the sliding bar, the upper computer 51 detects that the finger touches the sliding bar through the touch layer in the touch display screen, and then sends a trigger signal for sliding up and down to the control board 52. The control board 52 calls the up and down sliding tactile waveform according to the trigger signal, for example, the frequency of the waveform is f1, and applies the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The piezoelectric device 4 deforms and drives the cover 1 to vibrate. When the finger starts to slide up, the touch of the sliding bar can be felt. In addition, the present disclosure loads an excitation signal with a gradually increasing frequency to the piezoelectric device 4. For example, when the finger slides to the upper end, the frequency of the excitation signal is f2, f2≠f1; when When the finger is at the bottom of the slider, the anti-peeping function of the second display area A2 is turned off and does not have the anti-peeping function; when the finger starts to slide upward, the angle of the visible area gradually decreases. When the finger slides to 50% of the slider height, the excitation signal frequency is (f1+f2) / 2, and the visible area angle is 45°. At this time, when the angle between the line of sight and the normal of the touch screen is within the range of ±45°, the content displayed in the second display area A2 can be seen; when the finger slides to a position greater than 50% of the slider height, the visible area angle is less than 45°. At this time, when the angle between the line of sight and the normal of the screen is less than ±45°, the driver cannot see the screen content. And as the frequency of the excitation signal gradually increases, the tactile sensation of the finger touching the slider gradually increases. Therefore, the change in the visible area angle can be prompted by the gradual increase in the loading frequency.

[0084] In a specific implementation, when the longitudinal sliding bar shown in FIG10 is used to control the anti-peeping state of the second display area A2, the voltage peak of the excitation signal can also be changed according to the change in the position of the finger sliding up and down to indicate the change in the angle of the visible area. For example, when the finger touches the bottom of the sliding bar, the upper computer 51 detects the finger touching the sliding bar through the touch layer in the touch display screen, and then sends a trigger signal for sliding up and down to the control board 52. The control board 52 calls the tactile waveform of sliding up and down according to the trigger signal, for example, the voltage peak of the waveform is A1, and applies the excitation signal to the piezoelectric device 4 through the signal amplification circuit 53. The deformation of the piezoelectric device 4 drives the cover plate 1 to vibrate. When the finger starts to slide upward, the touch of the sliding bar can be felt. In addition, the present disclosure applies an excitation signal with a gradually increasing voltage peak to the piezoelectric device 4. For example, when the finger slides to the upper end, the voltage peak is A2, and A2≠A1. When the finger is at the bottom of the sliding bar, the anti-peeping function of the second display area A2 is turned off and does not have the anti-peeping function; when the finger starts to slide upward, the angle of the visible area gradually decreases, and as the voltage peak of the excitation signal gradually increases, the tactile sensation of the finger touching the sliding bar gradually increases, so the change in the angle of the visible area can be prompted by the gradual increase in the loaded voltage peak.

[0085] Specifically, as shown in FIG2 , in the embodiment of the present disclosure, piezoelectric devices 4 are arranged around the peripheral area BB, so that tactile feedback of each display area can be achieved by triggering the piezoelectric devices 4 corresponding to the first display area A1 and the second display area A2 respectively, or all piezoelectric devices 4 can be triggered at the same time to achieve corresponding tactile feedback.

[0086] It should be noted that the principle of realizing the anti-peeping and tactile feedback functions of the touch display screen shown in FIG5 is the same as that of FIG6 , and will not be described in detail here.

[0087] In specific implementation, the display device provided by the embodiment of the present disclosure may further include other film layers well known to those skilled in the art, which will not be described in detail here.

[0088] Based on the same inventive concept, an embodiment of the present disclosure further provides a method for driving a display device, which is used to drive the above-mentioned display device provided by an embodiment of the present disclosure. The driving method includes:

[0089] The user touches a virtual control;

[0090] The controller loads an excitation signal to the piezoelectric device according to the type of virtual control touched by the user, driving the piezoelectric device to deform, so that the touch display screen can provide tactile feedback. At the same time, it sends a control signal to the anti-peeping structure to put at least part of the display area in an anti-peeping state.

[0091] The driving method of the display device provided in the embodiment of the present disclosure can realize an anti-peeping display with integrated tactile feedback function.

[0092] In specific implementation, in the above driving method provided in the embodiment of the present disclosure, an excitation signal is applied to the piezoelectric device according to the type of virtual control touched by the user, specifically:

[0093] The host computer detects the type of virtual control touched by the user and sends a corresponding trigger signal to the control panel;

[0094] The control board calls the corresponding excitation signal according to the trigger signal, and loads the excitation signal to the piezoelectric device through the signal amplification circuit.

[0095] In specific implementation, the specific process of loading the excitation signal to the piezoelectric device according to the type of virtual control touched by the user can refer to the driving method in the aforementioned display device, which is not described in detail here.

[0096] In a specific implementation, in the aforementioned driving method provided in an embodiment of the present disclosure, the virtual control is a click button. When the host computer detects that a user has touched the click button, the control board sends a control signal to the privacy protection structure to control whether the privacy protection state of the display area is on or off. The specific process of controlling the privacy protection state of the display area by clicking the button can be found in the aforementioned driving method for a display device and will not be further described here.

[0097] In a specific implementation, in the aforementioned driving method provided in an embodiment of the present disclosure, the virtual control is a slider. When the host computer detects that a user has touched the side of the slider, the control panel sends a control signal to the privacy protection structure to turn off the privacy protection of the display area. When the host computer detects that the user has slid along the extension direction of the slider, the control panel sends a control signal to the privacy protection structure to gradually increase the area of ​​the display area in the privacy protection state. The specific process of controlling the privacy protection state of the display area via the slider can be found in the aforementioned driving method for a display device and will not be further described here.

[0098] In a specific implementation, in the aforementioned driving method provided in an embodiment of the present disclosure, the virtual control is a slider. When the host computer detects that a user has touched the side of the slider, the control panel sends a control signal to the privacy protection structure to turn off the privacy protection of the display area. When the host computer detects that a user has slid along the extension direction of the slider, the control panel sends a control signal to the privacy protection structure to gradually decrease the viewing angle of the display area. The specific process of controlling the privacy protection of the display area via the slider can be found in the aforementioned driving method for a display device and will not be further described here.

[0099] In practice, in the aforementioned driving method provided in the disclosed embodiment, when the host computer detects a user sliding along the extension direction of the slider, the control board applies a gradually increasing frequency excitation signal to the piezoelectric device. The specific process of gradually increasing the frequency and peak voltage to indicate the privacy protection state of the control display area can be found in the aforementioned driving method for a display device and will not be further described here.

[0100] In practice, in the aforementioned driving method provided in an embodiment of the present disclosure, when the host computer detects a user sliding along the extension direction of the slider, the control board applies an excitation signal with a gradually increasing voltage peak to the piezoelectric device. The specific process of gradually increasing the frequency and voltage peak to indicate the anti-peeping state of the control display area can be found in the aforementioned driving method for a display device and will not be further described here.

[0101] The present disclosure provides a display device and a driving method thereof, which can implement an anti-peeping function for a touchscreen display. By disposing a piezoelectric device in the peripheral area, the touchscreen display can provide tactile feedback. When a user touches a virtual control, an excitation signal is sent to the piezoelectric device based on the type of virtual control to implement the tactile feedback function. Simultaneously, a control signal is sent to the anti-peeping structure based on the virtual control to control the anti-peeping state of the anti-peeping structure. Therefore, the present disclosure provides an anti-peeping display device with integrated tactile feedback.

[0102] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0103] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if such changes and modifications of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such changes and modifications.

Claims

1. A display device, wherein: include: A cover plate, comprising a display area and a peripheral area; A touch display screen is arranged on the non-touch surface of the cover plate and is arranged in the display area, and the touch display screen is used to display virtual controls in a specific area of ​​the display area; An anti-peeping structure, arranged on a side of the touch display screen away from the cover plate and arranged in at least a portion of the display area, the anti-peeping structure being used to put at least a portion of the display area in an anti-peeping state under the drive of a control signal; A piezoelectric device is disposed on the non-touch surface of the cover plate and in the peripheral area, and the piezoelectric device is used to deform under the drive of an excitation signal to drive the cover plate to resonate; The controller is respectively connected to the touch display screen, the anti-peeping structure and the piezoelectric device. The controller is used to send the excitation signal to the piezoelectric device and the control signal to the anti-peeping structure according to the type of user touching the virtual control detected.

2. The display device according to claim 1, wherein: The virtual control is a click button, and the controller is used to send the control signal to the anti-peeping structure when detecting that the user touches the click button, so as to control the anti-peeping state of the display area to be on or off.

3. The display device according to claim 1, wherein: The virtual control is a sliding bar, and the controller is used to send the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in an off state when a user is detected touching the side end of the sliding bar; the controller is used to send the control signal to the anti-peeping structure to control the area of ​​the display area in the anti-peeping state to gradually increase when a user is detected sliding along an extension direction of the sliding bar.

4. The display device according to claim 1, wherein: The virtual control is a sliding bar, and the controller is used to send the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in an off state when the user is detected touching the side end of the sliding bar; the controller is used to send the control signal to the anti-peeping structure to control the visible area angle of the display area to gradually decrease when the user is detected sliding along the extension direction of the sliding bar.

5. The display device according to claim 3 or 4, wherein: The controller is used for applying an excitation signal with a gradually increasing frequency to the piezoelectric device according to the detection that the user slides along the extension direction of the sliding bar.

6. The display device according to claim 3 or 4, wherein: The controller is used for applying an excitation signal with a gradually increasing voltage peak value to the piezoelectric device according to the detection that the user slides along the extension direction of the sliding bar.

7. The display device according to any one of claims 3 to 6, wherein: The sliding bar is a horizontal sliding bar or a vertical sliding bar.

8. The display device according to any one of claims 1 to 7, wherein: The touch display screen is a vehicle-mounted display screen, and the touch display screen spans from the vehicle-mounted center console to the right A-pillar. The display area includes a first display area and a second display area. The first display area is close to the center console, and the second display area is close to the right A-pillar. The first display area is used to display the virtual controls, the second display area is used to display entertainment information, and the controller is used to control the anti-peeping state of the second display area through the virtual controls.

9. The display device according to claim 8, wherein: The touch display screen also spans to the left A-pillar, and the display area also includes a third display area located on a side of the first display area away from the second display area, and the third display area is used to display vehicle operation information and navigation information.

10. The display device according to any one of claims 1 to 7, wherein: The touch display screen is a vehicle-mounted display screen, and there are two of them. The first touch display screen is arranged in a position directly opposite the co-pilot in the vehicle, and the second touch display screen is arranged on the center console in the vehicle or in the central area of ​​the steering wheel in the vehicle. The first touch display screen is provided with the anti-peep structure, and the peripheral area of ​​the second touch display screen is provided with the piezoelectric device, and the second touch display screen is used to display the virtual control.

11. The display device according to any one of claims 1 to 10, wherein: It also includes a backlight module disposed on a side of the anti-peeping structure away from the cover plate, and a supporting back plate disposed on a side of the backlight module away from the cover plate; The supporting back plate is connected to the cover plate, and the piezoelectric device is arranged on the cover plate outside the supporting back plate.

12. The display device according to any one of claims 1 to 11, wherein: The controller includes a host computer, a control board and a signal amplification circuit; wherein, The host computer is used to send a corresponding trigger signal to the control panel according to the type of the virtual control touched by the user detected; The control board is used to call the corresponding excitation signal according to the trigger signal, and load the excitation signal to the piezoelectric device through the signal amplification circuit, and send the control signal to the anti-peeping structure according to the trigger signal.

13. A method for driving a display device, for driving the display device according to any one of claims 1 to 12, wherein: The driving method comprises: A user touches the virtual control; The controller loads an excitation signal to the piezoelectric device according to the type of the virtual control touched by the user, drives the piezoelectric device to deform, and enables the touch display screen to provide tactile feedback, while sending the control signal to the anti-peeping structure to put at least part of the display area in an anti-peeping state.

14. The driving method according to claim 13, wherein: According to the type of the virtual control touched by the user, an excitation signal is loaded to the piezoelectric device, specifically: The host computer detects the type of the virtual control touched by the user and sends a corresponding trigger signal to the control panel; The control board calls a corresponding excitation signal according to the trigger signal, and loads the excitation signal to the piezoelectric device through the signal amplification circuit.

15. The driving method according to claim 13, wherein: The virtual control is a click button. When the host computer detects that the user touches the click button, the control panel sends the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be on or off.

16. The driving method according to claim 13, wherein: The virtual control is a sliding bar. When the host computer detects that the user touches the side end of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in a closed state; when the host computer detects that the user slides along the extension direction of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the area of ​​the display area in the anti-peeping state to gradually increase.

17. The driving method according to claim 13, wherein: The virtual control is a sliding bar. When the host computer detects that the user touches the side end of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the anti-peeping state of the display area to be in a closed state; when the host computer detects that the user slides along the extension direction of the sliding bar, the control panel sends the control signal to the anti-peeping structure to control the visible area angle of the display area to gradually decrease.

18. The driving method according to claim 16 or 17, wherein: When the host computer detects that the user slides along the extension direction of the sliding bar, the control board applies an excitation signal with a gradually increasing frequency to the piezoelectric device.

19. The driving method according to claim 16 or 17, wherein: When the host computer detects that the user slides along the extension direction of the sliding bar, the control board applies an excitation signal with a gradually increasing voltage peak value to the piezoelectric device.

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