Touch display device and control method thereof

Abstract

The embodiment of the invention discloses a touch display device and a control method thereof. The control method comprises the steps that touch information is obtained through a touch chip, a visual angle switching signal is generated according to the touch information, ambient light parameters are obtained through a host system, and brightness sensing information is generated according to the ambient light parameters; and based on the visual angle switching signal, driving the touch display device to execute visual angle switching operation through the touch chip, and adjusting the backlight brightness of the touch display device through the host system in combination with the brightness sensing information. According to the scheme, the touch control function and the peep-proof function can be achieved at the same time through the single touch control chip, the number of peripheral circuits can be reduced, the product integration degree is increased, and therefore cost is reduced. Meanwhile, application software or an application switch does not need to be arranged, the peep-proof function can be achieved by multiplexing the touch control chip, and control operation can be simplified. In addition, according to the scheme, the influence of ambient light is considered, the backlight brightness is synchronously controlled when the display visual angle is switched, and the display effect is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a touch display device and a control method thereof. Background Art

[0002] Existing mobile phones have developed in a diversified manner, and the frequency of daily use is very high. The requirements for personal privacy protection are also increasing, so many mobile phone screens with anti-peep effects have appeared on the market.

[0003] In order to achieve better visual effects, the display screen is set to a wide viewing angle display; in some special cases, in order to protect personal privacy, the display screen is usually set to a narrow viewing angle display. At present, the method of achieving anti-peeping is mainly to generate corresponding viewing angle control instructions through application software or application switches, and transmit them to the operating system. The operating system sends the viewing angle control instructions to the driver chip, and the driver chip changes the driving mode to achieve the switching of the anti-peeping function, but this method is too cumbersome to apply. Another way is to achieve anti-peeping by adding additional anti-peeping layers and complex peripheral control circuits, but the product has poor integration and is difficult to miniaturize, and too many component designs increase the production cost and design difficulty, and the anti-peeping effects of these two methods are poor. Summary of the invention

[0004] The embodiment of the present invention provides a touch display device and a control method thereof, so as to realize touch and anti-peeping functions simultaneously by using a single touch chip, which is beneficial to simplifying control operations, reducing costs, and improving anti-peeping effects.

[0005] According to one aspect of the present invention, a control method for a touch display device is provided, comprising:

[0006] The touch information is acquired through the touch chip and a viewing angle switching signal is generated according to the touch information, and the ambient light parameters are acquired through the host system and brightness sensing information is generated according to the ambient light parameters.

[0007] Based on the viewing angle switching signal, the touch control chip drives the touch display device to perform a viewing angle switching operation, and in combination with the brightness sensing information, the host system adjusts the backlight brightness of the touch display device.

[0008] Optionally, the touch information includes a touch gesture;

[0009] The method of acquiring touch information through a touch chip and generating a viewing angle switching signal according to the touch information, and acquiring ambient light parameters through a host system and generating brightness sensing information according to the ambient light parameters includes:

[0010] Acquiring the touch gesture through the touch chip, and when the touch chip recognizes that the touch gesture is a preset gesture, the touch chip generates the viewing angle switching signal;

[0011] The ambient light parameters are acquired through the host system, and sensing brightness information is generated according to the ambient light parameters.

[0012] Optionally, different preset gestures correspond to different anti-peeping functions switched; wherein the anti-peeping function includes an anti-peeping type and an anti-peeping degree.

[0013] Optionally, the touch information further includes touch data, and the control method of the touch display device further includes:

[0014] The touch chip performs a corresponding touch operation according to the touch data.

[0015] Optionally, based on the viewing angle switching signal, driving the touch display device to perform a viewing angle switching operation through the touch chip, and adjusting the backlight brightness of the touch display device through the host system in combination with the brightness sensing information includes:

[0016] The touch chip controls and adjusts the deflection angle of the liquid crystal in the liquid crystal box according to the viewing angle switching signal, so as to switch the viewing angle of the touch display device between wide and narrow;

[0017] The viewing angle switching signal is fed back to the host system through the touch control chip, and the backlight brightness of the touch display device is adjusted by the host system according to the viewing angle switching signal and the brightness sensing information.

[0018] Optionally, under the same brightness sensing information, the backlight brightness of the touch display panel at a wide viewing angle is greater than the backlight brightness at a narrow viewing angle.

[0019] According to another aspect of the present invention, a touch display device is provided, comprising a backlight module, a control liquid crystal box, a display panel, a touch panel, a touch chip, a host system and an ambient light sensor;

[0020] The backlight module is arranged on the backlight side of the display panel, and the backlight module is used to provide backlight for the display panel;

[0021] The touch panel is arranged on the light emitting side of the display panel;

[0022] The touch chip is connected to the touch panel, and the touch chip is used to obtain touch information on the touch panel and generate a viewing angle switching signal according to the touch information;

[0023] The ambient light sensor is used to collect ambient light and transmit ambient light parameters to the host system, and the host system generates brightness sensing information according to the ambient light parameters;

[0024] The control liquid crystal box is arranged between the backlight module and the display panel, and the touch chip is further used to drive the control liquid crystal box to perform a viewing angle switching operation according to the viewing angle switching signal;

[0025] The touch control chip is also connected to a host system, and the host system is further used to adjust the backlight brightness of the backlight module according to the viewing angle switching signal and the brightness sensing information fed back by the touch control chip.

[0026] Optionally, the touch information includes touch data and a touch gesture, and the touch chip is used to generate the corresponding viewing angle switching signal when recognizing that the touch gesture is a preset gesture, and perform a corresponding touch operation according to the touch data.

[0027] Optionally, the touch display device further includes a signal processing module, the signal processing module is connected between the touch chip and the control liquid crystal box, and the signal processing module is used to process the viewing angle switching signal output by the touch chip so that the viewing angle switching signal meets the demand;

[0028] The control liquid crystal box includes a control electrode and a liquid crystal, the signal processing module includes a plurality of processing sub-units, each of the processing sub-units includes a comparison circuit and an amplifier circuit, the first input end of the comparison circuit is connected to the output end of the touch chip, the second input end of the comparison circuit is connected to a reference voltage, the output end of the comparison circuit is connected to the input end of the amplifier circuit, the output end of the amplifier circuit is connected to the control electrode, and the control electrode is used to control the liquid crystal deflection according to the voltage applied by the control electrode;

[0029] The number of the control electrodes is the same as the number of the processing sub-units, and the control electrodes are connected to the processing sub-units in a one-to-one correspondence;

[0030] The touch display device further includes a driving module, which is connected between the host system and the backlight module, and is used to drive the backlight module according to a signal output by the host system to adjust the backlight brightness of the backlight module.

[0031] Optionally, the display panel and / or the touch panel includes a light-transmitting area, and the ambient light sensor is arranged in the light-transmitting area;

[0032] The ambient light sensor and the touch chip are both human-computer interaction devices.

[0033] The technical solution provided by the embodiment of the present invention obtains touch information through a touch chip, and generates a viewing angle switching signal according to the touch information, and obtains ambient light parameters through a host system and generates brightness sensing information according to the ambient light parameters. Based on the viewing angle switching signal, the touch chip drives the touch display device to perform a viewing angle switching operation, and in combination with the brightness sensing information, the host system adjusts the backlight brightness of the touch display device. That is, the present solution can realize touch and anti-peeping functions simultaneously through a single touch chip, which is beneficial to reduce the number of peripheral circuits, increase product integration, and thus reduce costs. At the same time, there is no need to set application software or application switches, and the anti-peeping function can be realized by reusing the touch chip, which is beneficial to simplify the control operation. In addition, the present solution takes into account the influence of ambient light, and synchronously controls the backlight brightness when switching the display viewing angle, which is beneficial to improving the display effect.

[0034] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A flow chart of a control method of a touch display device provided by an embodiment of the present invention;

[0037] Figure 2 A schematic structural diagram of a touch display device provided by an embodiment of the present invention;

[0038] Figure 3 A flowchart of another method for controlling a touch display device provided by an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of a data transmission architecture provided by an embodiment of the present invention;

[0040] Figure 5 A flowchart of another method for controlling a touch display device provided by an embodiment of the present invention;

[0041] Figure 6 A schematic structural diagram of another touch display device provided by an embodiment of the present invention;

[0042] Figure 7 A waveform diagram of a viewing angle control signal provided by an embodiment of the present invention;

[0043] Figure 8 A schematic diagram of data flow between an application and a driver stack provided by an embodiment of the present invention;

[0044] Among them, 10-backlight module; 20-regulating liquid crystal box; 30-display panel; 40-touch panel;

[0045] 110-touch chip; 120-host system; 130-ambient light sensor; 140-drive module;

[0046] 151 - a first comparison circuit; 152 - a second comparison circuit;

[0047] 161 - a first amplifier circuit; 162 - a second amplifier circuit. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0049] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] Figure 1 A flow chart of a control method of a touch display device provided by an embodiment of the present invention, the control method can be executed by the touch display device, Figure 2 A schematic diagram of a touch display device according to an embodiment of the present invention is provided. Figure 1 and Figure 2 , the control method of the touch display device provided in this embodiment includes:

[0051] S110, acquiring touch information through the touch chip and generating a viewing angle switching signal according to the touch information, and acquiring ambient light parameters through the host system and generating brightness sensing information according to the ambient light parameters.

[0052] Among them, the ambient light parameters refer to data parameters corresponding to the light intensity, brightness, etc. of the external ambient light. The ambient light can be collected by the ambient light sensor 130 arranged on the touch display device, and converted into a corresponding induced voltage and transmitted to the host system 120. The host system 120 obtains the corresponding ambient light parameters according to the received induced voltage. The host system 120 processes the received ambient light parameters to obtain brightness sensing information. The brightness sensing information can be used to characterize the brightness of light in the external environment. For example, when the application in the host system 120 receives the induced voltage, the induced voltage is processed to generate brightness sensing information.

[0053] The touch information includes a control signal for realizing a touch function and / or an anti-peeping function. The touch chip 110 can obtain the corresponding touch information by collecting touch operations on the touch panel 40 .

[0054] The touch control chip 110 is internally provided with an MCU, and the MCU processes the received touch information and outputs a viewing angle switching signal. The viewing angle switching signal output by the touch control chip 110 is different under different display viewing angles.

[0055] S120 , based on the viewing angle switching signal, the touch display device is driven by the touch chip to perform a viewing angle switching operation, and the backlight brightness of the touch display device is adjusted by the host system in combination with the brightness sensing information.

[0056] Specifically, the touch chip 110 feeds back the generated viewing angle switching signal to the touch display device to drive the touch display device to perform the viewing angle switching operation, switching from narrow viewing angle display to wide viewing angle display, or from wide viewing angle display to narrow viewing angle display. For example, the touch display device is provided with a control liquid crystal box 20, which is provided between the backlight module 10 and the display panel 30. The touch chip 110 transmits the viewing angle switching signal to the control liquid crystal box 20 to control the liquid crystal in the control liquid crystal box 20 to deflect, thereby controlling the light output angle of the backlight module 10, and then realizing the wide and narrow viewing angle switching.

[0057] In this embodiment, in order to ensure a good anti-peeping effect, while the viewing angle is switched, the backlight brightness of the touch display device is also adjusted, that is, the backlight brightness of the backlight module 10 is adjusted. The host system 120 generates brightness sensing information based on the acquired ambient light parameters, and the host system 120 adjusts the backlight brightness of the backlight module 10 based on the received brightness sensing information and the viewing angle switching signal. For example, the host system 120 generates a driving signal based on the received brightness sensing information and the viewing angle switching signal, and the driving module 140 drives the backlight module 10 to work based on the received driving signal to adjust the backlight brightness of the backlight module 10, so that the backlight brightness can adapt to the viewing angle display of the touch display device.

[0058] The technical solution provided by the embodiment of the present invention obtains touch information through a touch chip, and generates a viewing angle switching signal according to the touch information, and obtains ambient light parameters through a host system and generates brightness sensing information according to the ambient light parameters. Based on the viewing angle switching signal, the touch chip drives the touch display device to perform a viewing angle switching operation, and in combination with the brightness sensing information, the host system adjusts the backlight brightness of the touch display device. That is, the present solution can realize touch and anti-peeping functions simultaneously through a single touch chip, which is beneficial to reduce the number of peripheral circuits, increase product integration, and thus reduce costs. At the same time, there is no need to set application software or application switches, and the anti-peeping function can be realized by reusing the touch chip, which is beneficial to simplify the control operation. In addition, the present solution takes into account the influence of ambient light, and synchronously controls the backlight brightness when switching the display viewing angle, which is beneficial to improving the display effect.

[0059] Figure 3 A flowchart of another method for controlling a touch display device provided by an embodiment of the present invention, Figure 4 A schematic diagram of a data transmission architecture provided by an embodiment of the present invention, referring to Figure 3 and Figure 4 Based on the above embodiment, optionally, step S110 includes:

[0060] S1101. Acquire a touch gesture through a touch chip. When the touch chip recognizes that the touch gesture is a preset gesture, the touch chip generates a viewing angle switching signal.

[0061] Specifically, the touch information includes touch gestures. The MCU inside the touch chip 110 is usually provided with an identification code, which can directly identify the gesture operation input by the touch panel 40. The gesture operation can be a straight line, a curve, a point, and other gestures. When the touch gesture recognized by the touch chip 110 is a preset gesture, a viewing angle switching signal is directly generated.

[0062] The preset gesture for generating the viewing angle switching signal may be a default touch gesture of the touch display device, whose identification code is pre-set in the touch chip 110, or may be any one or more touch gestures set according to one's own needs. For example, a corresponding control instruction may be set according to the input touch gesture to change the identification code corresponding to the preset gesture in the touch chip 110.

[0063] In this embodiment, the preset gesture can be a gesture that is significantly different from a normal touch operation to avoid misoperation. For example, a gesture in the shape of a number or letter can be set as a preset gesture, or gestures when a touch operation is performed with different numbers of fingers can be set as a preset gesture.

[0064] Optionally, when the touch chip 110 recognizes that the touch gesture is a preset gesture, it can control the generation of a pop-up prompt to improve the accuracy of the touch operation.

[0065] In this embodiment, different preset gestures correspond to different anti-peeping functions; wherein the anti-peeping function includes the type of anti-peeping (e.g., local anti-peeping or full-screen anti-peeping) and the degree of anti-peeping (e.g., the depth of the anti-peeping color, or the size of the anti-peeping angle). Exemplarily, when the touch chip 110 recognizes that the touch gesture is the first preset gesture, the touch chip 110 is controlled to generate a first viewing angle switching signal; when the touch chip 110 recognizes that the touch gesture is the second preset gesture, the touch chip 110 is controlled to generate a second viewing angle switching signal; when the touch chip 110 recognizes that the touch gesture is the third preset gesture, the touch chip 110 is controlled to generate a third viewing angle switching signal; when the touch chip 110 recognizes that the touch gesture is the fourth preset gesture, the touch chip 110 is controlled to generate a fourth viewing angle switching signal. Among them, the first preset gesture, the second preset gesture, the preset gesture and the fourth preset gesture are different from each other.

[0066] For example, the first preset gesture may be a touch gesture of sliding left or right with two fingers. When the touch chip 110 recognizes the first preset gesture, it generates a first viewing angle switching signal, and the first viewing angle switching signal may be used to control the touch display device to perform partial privacy protection. For example, by sliding left or right with two fingers in a designated area, privacy protection may be implemented in the designated area or half of the screen area.

[0067] The second preset gesture may be a touch gesture of sliding up or down with two fingers. When the touch chip 110 recognizes the second preset gesture, it generates a second viewing angle switching signal, which can be used to control the touch display device to realize full-screen shallow mode anti-peeping.

[0068] The third preset gesture may be a touch gesture of sliding up or down with three fingers. When the touch chip 110 recognizes the third preset gesture, a third viewing angle switching signal is generated, which can be used to control the touch display device to implement full-screen deep mode anti-peeping.

[0069] The fourth preset gesture may be a touch gesture by tapping with one finger. When the touch chip 110 recognizes the fourth preset gesture, a fourth viewing angle switching signal is generated, and the fourth viewing angle switching signal is used to control the touch display device to release the anti-peeping operation. For example, when tapping with one finger for a certain period of time, the narrow viewing angle display can be switched to the wide viewing angle display to release the anti-peeping operation.

[0070] It should be noted that the preset gestures given in the above embodiment are only an optional implementation and are not intended to limit the above embodiment. Under the premise that the anti-peeping function and touch recognition can be supported, the anti-peeping function of random areas and random screen sizes can be realized.

[0071] The technical solution provided in this embodiment implements gesture control of the anti-peeping function through the touch chip 110 without adding an additional anti-peeping switching switch or application program, thereby making it more convenient to implement the anti-peeping switching, which is beneficial to improving the user experience.

[0072] S1102: Acquire ambient light parameters through the host system, and generate sensing brightness information according to the ambient light parameters.

[0073] Specifically, a light-transmitting area is provided on the touch panel 40 and / or the display panel 30, and the ambient light sensor 130 can be provided in the light-transmitting area. The application in the host system 120 can directly process and calculate the ambient light parameters (eg, the sensed voltage) output by the ambient light sensor 130 to obtain sensed brightness information.

[0074] Figure 5 A flowchart of another control method of a touch display device provided by an embodiment of the present invention, referring to Figure 4 and Figure 5 Based on the above embodiments, optionally, step S120 includes:

[0075] S1201. Controlling and adjusting the deflection angle of liquid crystal in the liquid crystal box by the touch chip according to the viewing angle switching signal, so as to switch the viewing angle of the touch display device between wide and narrow viewing angles.

[0076] Specifically, viewing angle electrodes (control electrodes) and liquid crystal are provided in the regulating liquid crystal box 20, and the touch chip 110 transmits the viewing angle switching signal to the viewing angle electrode, and changes the deflection angle of the liquid crystal in the box by applying different voltages to the viewing angle electrode, thereby changing the light output angle of the light emitted by the backlight module 10 after passing through the regulating liquid crystal box 20, thereby realizing the switching of the wide and narrow viewing angles of the touch display device.

[0077] S1202 , feeding back a viewing angle switching signal to the host system via the touch chip, and adjusting the backlight brightness of the touch display device via the host system according to the viewing angle switching signal and the brightness sensing information.

[0078] Specifically, after the touch chip 110 generates a viewing angle switching signal according to the touch information, the touch chip 110 transmits the viewing angle switching signal (or the viewing angle switching result corresponding to the viewing angle switching signal) to the host system 120. The host system 120 determines whether the viewing angle to be switched by the touch display device is a wide viewing angle or a narrow viewing angle according to the received viewing angle switching signal, and determines the brightness of the external ambient light through the brightness sensing information, and feeds back the backlight data to the backlight module 10 in combination with the viewing angle switching signal and the brightness sensing information to adjust the backlight brightness.

[0079] Among them, after the application in the host system 120 processes and calculates the ambient light parameters output by the ambient light sensor 130 to obtain the sensed brightness information, and then combines it with the viewing angle switching signal output by the touch chip 110, the application can be used to establish a corresponding APP for more intuitive human-computer interaction operations, such as adjusting the duty cycle of the backlight brightness through the brightness adjustment slider, thereby realizing the dimming function.

[0080] Optionally, under the same brightness sensing information, the backlight brightness of the touch display panel at a wide viewing angle is greater than the backlight brightness at a narrow viewing angle. For example, according to the information fed back by the touch chip 110, when the external environment is in daytime (e.g., the brightness exceeds 200 nit), if the host system 120 determines that the touch display device is in a wide viewing angle display, the backlight brightness is adjusted to 100%; if the host system 120 determines that the touch display device is in a narrow viewing angle display, the backlight brightness is adjusted to 80%.

[0081] When the external environment is in the evening (for example, the brightness is less than 200 nit), if the host system 120 determines that the touch display device is in a wide viewing angle display, the backlight brightness remains at 100% and no adjustment is made (or the backlight brightness is adjusted to 70%, which can be set according to actual needs); if the host system 120 determines that the touch display device is in a narrow viewing angle display, the backlight brightness is adjusted to 70% (or the backlight brightness is adjusted to 60%).

[0082] When the external environment is at night (eg, the brightness is less than 100 nit), if the host system 120 determines that the touch display device is in a wide viewing angle display, the backlight brightness is adjusted to 50%; if the host system 120 determines that the touch display device is in a narrow viewing angle display, the backlight brightness is adjusted to 30%.

[0083] It should be understood that the duty cycle of the backlight brightness described above is merely an exemplary embodiment of an optional method and is not intended to be limiting. In practical applications, the duty cycle can be flexibly set according to actual needs.

[0084] It should be further explained that, in this embodiment, the host system 120 processes the brightness sensing information and the viewing angle switching signal fed back by the touch chip 110 at the same time, and adjusts the backlight brightness in combination with the brightness sensing information and the viewing angle switching signal.

[0085] Optionally, in this embodiment, the touch information also includes touch data, and the touch data is used to implement basic touch functions. The control method of the touch display device provided in this embodiment also includes: controlling the touch chip to perform a corresponding touch operation according to the touch data. The specific touch principle can be referred to the description of the relevant technology, which will not be repeated here.

[0086] Optionally, an embodiment of the present invention further provides a touch display device, which can be used to execute the control method of the touch display device provided by any embodiment of the present invention, in combination with Figure 2 The touch display device provided in this embodiment includes a backlight module 10, a control liquid crystal box 20, a display panel 30, a touch panel 40, a touch chip 110, a host system 120 and an ambient light sensor 130. The backlight module 10 is arranged on the backlight side of the display panel 30, and the backlight module 10 is used to provide backlight for the display panel 30; the touch panel 40 is arranged on the light emitting side of the display panel 30; the touch chip 110 is connected to the touch panel 30, and the touch chip 110 is used to obtain touch information on the touch panel 40 and generate a viewing angle switching signal according to the touch information; The ambient light sensor 130 is used to collect ambient light and transmit ambient light parameters to the host system 120, and the host system 120 is used to generate brightness sensing information based on the ambient light parameters; the control liquid crystal box 20 is arranged between the backlight module 10 and the display panel 30, and the touch chip 110 is also used to drive the control liquid crystal box 20 to perform a viewing angle switching operation according to a viewing angle switching signal; the touch chip 110 is also connected to the host system 120, and the host system 120 is used to adjust the backlight brightness of the backlight module 10 according to the viewing angle switching signal and brightness sensing information fed back by the touch chip 110.

[0087] The technical solution provided by the embodiment of the present invention obtains touch information through a touch chip, and generates a viewing angle switching signal according to the touch information, and obtains ambient light parameters through a host system and generates brightness sensing information according to the ambient light parameters. Based on the viewing angle switching signal, the touch chip drives the touch display device to perform a viewing angle switching operation, and in combination with the brightness sensing information, the host system adjusts the backlight brightness of the touch display device. That is, the present solution can realize touch and anti-peeping functions simultaneously through a single touch chip, which is beneficial to reduce the number of peripheral circuits, increase product integration, and thus reduce costs. At the same time, there is no need to set application software or application switches, and the anti-peeping function can be realized by reusing the touch chip, which is beneficial to simplify the control operation. In addition, the present solution takes into account the influence of ambient light, and synchronously controls the backlight brightness when switching the display viewing angle, which is beneficial to improving the display effect.

[0088] Optionally, the connection between the touch chip 110 and the ambient light sensor 130 and the touch panel 40 may be an electrical connection, and the connection between the touch chip 110 and the host system 120 may be a communication connection.

[0089] Figure 6 A schematic diagram of another touch display device provided by an embodiment of the present invention, referring to Figure 6 On the basis of the above embodiment, optionally, the touch display device further includes a signal processing module, the signal processing module is connected between the touch chip 110 and the control liquid crystal box 20, and the signal processing module is used to process the viewing angle switching signal output by the touch chip 110 so that the viewing angle switching signal meets the demand. The control liquid crystal box 20 includes a control electrode and a liquid crystal, the signal processing module includes a multi-channel processing sub-unit, each processing sub-unit includes a comparison circuit and an amplifier circuit, the first input end of the comparison circuit is connected to the output end of the touch chip 110, the second input end of the comparison circuit is connected to the reference voltage VDD, the output end of the comparison circuit is connected to the input end of the amplifier circuit, the output end of the amplifier circuit is connected to the control electrode, and the control electrode is used to control the liquid crystal deflection according to the voltage applied by itself; the touch display device further includes a driving module 140, the driving module 140 is connected between the host system 120 and the backlight module 10, and the driving module 140 is used to drive the backlight module 10 according to the signal output by the host system 120 to adjust the backlight brightness of the backlight module 10.

[0090] In this embodiment, the control liquid crystal box 20 may be a single-layer electrode structure, or a double-layer or multi-layer electrode structure, wherein the number of control electrodes is the same as the number of processing subunits, and the control electrodes are connected to the processing subunits in a one-to-one correspondence.

[0091] Taking the control liquid crystal box 20 as a double-layer electrode structure as an example, the control liquid crystal box 20 includes a first control electrode, a second control electrode, and a liquid crystal located between the first control electrode and the second control electrode (the first control electrode and the second control electrode are viewing angle electrodes), and the signal processing module includes a first processing subunit and a second processing subunit. The first processing subunit includes a first comparison circuit 151 and a first amplifier circuit 161. The first input end of the first comparison circuit 151 is connected to the first output end of the touch chip 110, the second input end of the first comparison circuit 151 is connected to the reference voltage VDD, the output end of the first comparison circuit 151 is connected to the input end of the first amplifier circuit 161, and the output end of the first amplifier circuit 161 is connected to the first control electrode; the second processing subunit includes a second comparison circuit 152 and a second amplifier circuit 162. The first input end of the second comparison circuit 152 is connected to the second output end of the touch chip 110, the second input end of the second comparison circuit 152 is connected to the reference voltage VDD, the output end of the second comparison circuit 152 is connected to the input end of the second amplifier circuit 162, and the output end of the second amplifier circuit 162 is connected to the second control electrode.

[0092] Among them, the first comparison circuit 151 and the second comparison circuit 152 can both be subtraction circuits built with amplifiers, and the first amplifier circuit 161 and the second amplifier circuit 162 can also be built with amplifiers. The first viewing angle switching signal generated by the touch chip 110 is processed by the corresponding first comparison circuit 151 and the first amplifier circuit 161, and the first control signal ITO1 is output. The second viewing angle switching signal generated by the touch chip 110 is processed by the corresponding second comparison circuit 152 and the second amplifier circuit 162, and the second control signal ITO2 is output. The waveforms of the first control signal ITO1 and the second control signal ITO2 can meet the requirements of viewing angle switching.

[0093] Figure 7 A waveform diagram of a viewing angle control signal provided by an embodiment of the present invention, combined with Figure 7 , the first control signal ITO1 is transmitted to the first control electrode, and the second control signal ITO2 is transmitted to the second control electrode. The waveforms of the first control signal ITO1 and the second control signal ITO2 are opposite. When the first control signal ITO1 is at a high level, the second control signal ITO2 is at a low level. When the first control signal ITO1 is at a low level, the second control signal ITO2 is at a high level. A voltage difference is generated between the first control electrode and the second control electrode to control the deflection of the liquid crystal to control the light output angle, thereby realizing the viewing angle switching.

[0094] Optionally, in this embodiment, the ambient light sensor 130 and the touch chip 110 are both human interface devices (HID), which can realize the interaction between the application program and the hardware device. Figure 8 A schematic diagram of data flow between an application and a driver stack provided by an embodiment of the present invention, referring to Figure 8 , applications are usually software that provides specific functions to users. Application 1 and Application 2 are software corresponding to two different sensors respectively; while the driver stack is a set of software layers used to connect hardware devices to the operating system, where the operating system contains a built-in sensor HID class driver. When an application needs to interact with a hardware device, the application sends data requests down to the driver stack Driver Process (as shown in the dotted box) through the sensor interface provided by the operating system. The driver stack converts these requests into instructions that the hardware device can understand (HID class.sys) and transmits the data to the hardware device (HID transmission-sensor process). Conversely, when the hardware device has data to send to the application, the data is transmitted from the hardware device upward through the driver stack. The driver stack converts the data of the hardware device into a format that the operating system and application can handle, and passes it to the application. This back-and-forth flow of data ensures that the application can effectively communicate and interact with the hardware device to achieve various functions.

[0095] The technical solution provided in this embodiment uses an ambient light sensor and a touch chip with a human-computer interaction function to better realize the anti-peeping function by combining touch gestures and ambient light without affecting the touch performance.

[0096] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0097] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A control method for a touch display device, characterized in that: include: Acquiring touch information through a touch chip and generating a viewing angle switching signal according to the touch information, and acquiring ambient light parameters through a host system and generating brightness sensing information according to the ambient light parameters; Based on the viewing angle switching signal, the touch control chip drives the touch display device to perform a viewing angle switching operation, and in combination with the brightness sensing information, the host system adjusts the backlight brightness of the touch display device.

2. The control method of the touch display device according to claim 1, characterized in that: The touch information includes a touch gesture; The method of acquiring touch information through a touch chip and generating a viewing angle switching signal according to the touch information, and acquiring ambient light parameters through a host system and generating brightness sensing information according to the ambient light parameters includes: Acquiring the touch gesture through the touch chip, and when the touch chip recognizes that the touch gesture is a preset gesture, the touch chip generates the viewing angle switching signal; The ambient light parameters are acquired through the host system, and sensing brightness information is generated according to the ambient light parameters.

3. The control method of the touch display device according to claim 2, characterized in that: Different preset gestures correspond to different anti-peeping functions; The anti-peeping function includes the anti-peeping type and the anti-peeping degree.

4. The control method of the touch display device according to claim 2, characterized in that: The touch information also includes touch data, and the control method of the touch display device also includes: The touch chip performs a corresponding touch operation according to the touch data.

5. The control method of the touch display device according to claim 1, characterized in that: The step of driving the touch display device to perform a viewing angle switching operation through the touch chip based on the viewing angle switching signal, and adjusting the backlight brightness of the touch display device through the host system in combination with the brightness sensing information includes: The touch chip controls and adjusts the deflection angle of the liquid crystal in the liquid crystal box according to the viewing angle switching signal, so as to switch the viewing angle of the touch display device between wide and narrow; The viewing angle switching signal is fed back to the host system through the touch control chip, and the backlight brightness of the touch display device is adjusted by the host system according to the viewing angle switching signal and the brightness sensing information.

6. The control method of the touch display device according to claim 5, characterized in that: Under the same brightness sensing information, the backlight brightness of the touch display panel at a wide viewing angle is greater than the backlight brightness at a narrow viewing angle.

7. A touch display device, characterized in that: Including backlight module, control liquid crystal box, display panel, touch panel, touch chip, host system and ambient light sensor; The backlight module is arranged on the backlight side of the display panel, and the backlight module is used to provide backlight for the display panel; The touch panel is arranged on the light emitting side of the display panel; The touch chip is connected to the touch panel, and the touch chip is used to obtain touch information on the touch panel and generate a viewing angle switching signal according to the touch information; The ambient light sensor is used to collect ambient light and transmit ambient light parameters to the host system, and the host system is used to generate brightness sensing information according to the ambient light parameters; The control liquid crystal box is arranged between the backlight module and the display panel, and the touch chip is further used to drive the control liquid crystal box to perform a viewing angle switching operation according to the viewing angle switching signal; The touch control chip is also connected to a host system, and the host system is further used to adjust the backlight brightness of the backlight module according to the viewing angle switching signal and the brightness sensing information fed back by the touch control chip.

8. The touch display device according to claim 7, characterized in that: The touch information includes touch data and a touch gesture. The touch chip is used to generate the corresponding viewing angle switching signal when recognizing that the touch gesture is a preset gesture, and to perform a corresponding touch operation according to the touch data.

9. The touch display device according to claim 7, characterized in that: The touch display device further includes a signal processing module, which is connected between the touch chip and the control liquid crystal box, and is used to process the viewing angle switching signal output by the touch chip so that the viewing angle switching signal meets the demand; The control liquid crystal box includes a control electrode and a liquid crystal, the signal processing module includes a plurality of processing sub-units, each of the processing sub-units includes a comparison circuit and an amplifier circuit, the first input end of the comparison circuit is connected to the output end of the touch chip, the second input end of the comparison circuit is connected to a reference voltage, the output end of the comparison circuit is connected to the input end of the amplifier circuit, the output end of the amplifier circuit is connected to the control electrode, and the control electrode is used to control the liquid crystal deflection according to the voltage applied by the control electrode; The number of the control electrodes is the same as the number of the processing sub-units, and the control electrodes are connected to the processing sub-units in a one-to-one correspondence; The touch display device further comprises a driving module, which is connected between the host system and the backlight module, and is used for driving the backlight module according to a signal output by the host system to adjust the backlight brightness of the backlight module.

10. The touch display device according to claim 7, characterized in that: The display panel and / or the touch panel comprises a light-transmitting area, and the ambient light sensor is arranged in the light-transmitting area; The ambient light sensor and the touch chip are both human-computer interaction devices.

Images