CN117761930A - Display panel, display device, and control method of display device - Google Patents
Display panel, display device, and control method of display device Download PDFInfo
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- CN117761930A CN117761930A CN202410137962.5A CN202410137962A CN117761930A CN 117761930 A CN117761930 A CN 117761930A CN 202410137962 A CN202410137962 A CN 202410137962A CN 117761930 A CN117761930 A CN 117761930A
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Abstract
The invention provides a display panel, a display device and a control method of the display device. The display panel comprises a display liquid crystal module, a visual angle adjusting liquid crystal module and a backlight module which are sequentially stacked, wherein the visual angle adjusting liquid crystal module is used for adjusting the visual angle of the display panel, and the display liquid crystal module comprises an embedded touch control module; the driving electrode of the visual angle adjusting liquid crystal module is connected with the high-frequency pulse signal line of the embedded touch module. According to the technical scheme, the driving electrode of the visual angle adjusting liquid crystal module is connected with the high-frequency pulse signal line of the embedded touch control module, so that the high-frequency pulse signal can be provided for the driving electrode of the visual angle adjusting liquid crystal module, interference of parasitic capacitance on a detected touch control result is counteracted, and the accuracy of touch control detection can be improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a display device, and a control method of the display device.
Background
Along with the development of display technology and the increase of the demands of users, the peep-proof function becomes a function of the display device which is focused, and the peep-proof display device which is reused by vehicles and business displays is usually provided with a peep-proof liquid crystal panel, and the liquid crystal deflection can be adjusted by adjusting the voltage applied by the peep-proof liquid crystal panel, so that the adjustment of the visual angle of the display panel is realized, and a sharing mode with a larger visual angle and a peep-proof mode with a smaller visual angle are provided.
In the related art, in order to realize the touch function, the peep-proof display module needs to be equipped with an independent externally hung touch module, which leads to the increase of the overall thickness and cost of the display module and affects the convenience of application.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a control method of the display device, which are used for solving the problems that the thickness cost is increased and the use is inconvenient when a peep-proof display module is provided with a touch function in the related art.
To solve the above problems, the present invention is achieved as follows:
in a first aspect, an embodiment of the present invention provides a display panel, including a display liquid crystal module, a viewing angle adjusting liquid crystal module, and a backlight module, which are sequentially stacked, where the viewing angle adjusting liquid crystal module is configured to adjust a visible viewing angle of the display panel, and the display liquid crystal module includes an embedded touch module;
the driving electrode of the visual angle adjusting liquid crystal module is connected with the high-frequency pulse signal line of the embedded touch module.
In some embodiments, the embedded touch module is a touch display driver integrated TDDI touch module.
In some embodiments, the driving electrode of the viewing angle adjusting liquid crystal module includes a first signal terminal for providing a direct current signal and a second signal terminal capable of providing an alternating current signal, and the first signal terminal and the second signal terminal are connected to the high frequency pulse signal line.
In some embodiments, the display device further includes a superposition circuit, where the second signal end is connected to the high-frequency pulse signal line through the superposition circuit, and the superposition circuit is configured to superimpose a driving signal of the driving signal end and the high-frequency pulse signal provided by the high-frequency pulse signal line, and then provide the superimposed driving signal and the high-frequency pulse signal to the second signal end of the viewing angle adjusting liquid crystal module.
In some of these embodiments, the superimposing circuit includes:
the output end of the amplifier is connected with the second signal end;
the first end of the first resistor is connected with the high-frequency pulse signal line, and the second end of the first resistor is connected with the positive electrode of the amplifier;
the first end of the second resistor is connected with the driving signal end of the visual angle adjusting liquid crystal module, and the second end of the first resistor is connected with the positive electrode of the amplifier;
the first end of the third resistor is connected with the reference signal end, and the second end of the third resistor is connected with the negative electrode of the amplifier;
and the first end of the fourth resistor is connected with the negative electrode of the amplifier, and the second end of the fourth resistor is connected with the output end of the amplifier.
In some embodiments, the first resistor, the second resistor, the third resistor, and the fourth resistor have equal resistance values.
In some embodiments, the display liquid crystal module comprises a first polarizer, a color film substrate, an array substrate and a second polarizer which are sequentially stacked, wherein the color film substrate and the array substrate form a box-to-box structure, a liquid crystal layer is arranged between boxes of the box-to-box structure, and a touch electrode for touch detection is arranged on the array substrate.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel according to any one of the first aspects.
In a third aspect, an embodiment of the present invention provides a control method of a display device, which is applied to the display device described above, the method including:
providing a high-frequency pulse signal to a driving electrode of the visual angle adjusting liquid crystal module;
detecting whether the output level of a target area corresponding to the embedded touch module meets a preset value or not;
and determining a touch signal corresponding to the target area according to whether the output level of the embedded touch module meets a preset value.
In some embodiments, the driving electrode of the viewing angle adjusting liquid crystal module includes a first signal terminal for providing a direct current signal and a second signal terminal capable of providing an alternating current signal, and the supplying of the high frequency pulse signal to the driving electrode of the viewing angle adjusting liquid crystal module includes:
providing the high frequency pulse signal to the first signal terminal, and
and superposing a driving signal of the driving signal end and the high-frequency pulse signal and providing the superposed driving signal and the high-frequency pulse signal to the second signal end.
According to the technical scheme, the driving electrode of the visual angle adjusting liquid crystal module is connected with the high-frequency pulse signal line of the embedded touch control module, so that the high-frequency pulse signal can be provided for the driving electrode of the visual angle adjusting liquid crystal module, interference of parasitic capacitance on a detected touch control result is counteracted, and the accuracy of touch control detection can be improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of a display panel according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a TDDI touch module in an embodiment of the present invention;
FIG. 3 is a schematic diagram of parasitic capacitance in an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating the operation of an angle-adjusting LCD module according to an embodiment of the present invention;
FIG. 5 is a graph showing voltage and transmittance curves of two electrodes of a liquid crystal at a 45 viewing angle according to one embodiment of the present invention;
FIG. 6 is a timing diagram of driving voltages of an angle-adjusting LCD module according to an embodiment of the invention;
FIG. 7 is a driving timing diagram of original signals of a display panel according to an embodiment of the invention;
FIG. 8 is a timing diagram of driving the modulation signals of the display panel according to an embodiment of the invention;
FIG. 9 is a circuit diagram of a superposition circuit according to an embodiment of the invention;
fig. 10 is a schematic diagram of a circuit detection result of parasitic capacitance according to an embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," and the like in embodiments of the present invention are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the use of "and/or" in this application means at least one of the connected objects, such as a and/or B and/or C, is meant to encompass the 7 cases of a alone, B alone, C alone, and both a and B, both B and C, both a and C, and both A, B and C.
The embodiment of the invention provides a display panel and a display device using the same.
As shown in fig. 1, in one embodiment, the display panel includes a display liquid crystal module 200, a viewing angle adjusting liquid crystal module 100, and a backlight module 300, which are sequentially stacked, and the viewing angle adjusting liquid crystal module 100 is used for adjusting the visual viewing angle of the display panel.
The display liquid crystal module 200 includes an in-cell touch module, and the driving electrode of the viewing angle adjusting liquid crystal module 100 is connected to a high-frequency pulse signal line of the in-cell touch module.
In some embodiments, the display liquid crystal module 200 includes a first polarizer 210, a color film substrate 220, an array substrate 230, and a second polarizer 240 that are sequentially stacked, wherein the color film substrate 220 and the array substrate 230 form a box-to-box structure, a first liquid crystal layer 250 is disposed between boxes of the box-to-box structure, and a touch electrode for performing touch detection is disposed on the array substrate 230 to form an embedded touch module.
The external Touch module (On Cell Touch) refers to that after the Touch detection module is independently manufactured, the external Touch module is attached to the display module, in other words, the external Touch module and the display module are mutually independent, so that the external Touch module is relatively interfered less, but the overall thickness of the display module and the Touch module after superposition is increased.
In the technical solution of this embodiment, the display liquid crystal module 200 includes an embedded touch module (Full In Cell Touch, in-box touch technology), which is different from the existing external touch module, and the embedded touch module integrates the touch sensor on the display panel when manufacturing the array substrate 230 and other structures, so that on one hand, the overall thickness of the product can be reduced, and on the other hand, the number of process steps can be reduced, thereby reducing the manufacturing cost.
As shown in fig. 2, fig. 2 is a conventional in-cell touch module, specifically, a TDDI (Touch Display Driver Intergration, touch display driver integration) touch module, which integrates a sensor into the display panel.
Specifically, the sensor of the TDDI touch module comprises a plurality of sensor electrode blocks which are mutually independent, and each sensor electrode block is provided with an independent wiring, so that independent detection and control of each sensor electrode block can be realized.
However, since each sensor electrode block is integrated on the array substrate 230, parasitic capacitance exists between each sensor electrode block and conductive structures such as a Gate metal wiring (Gate), a data line wiring (Source), a common voltage signal line Vcom, and the like.
Each sensor electrode block has a plurality of parasitic capacitances in-plane, specifically,generating parasitic capacitance C between sensor electrode block and gate metal wiring GV Parasitic capacitance C between sensor electrode block and data line trace SV Parasitic capacitance C between sensor electrode block and common voltage signal line VV Obviously, parasitic capacitances may occur between the metal film layers stacked, and the kind of parasitic capacitance actually generated is not limited to this.
The presence of numerous parasitic capacitances can cause the capacitance value of the back-end driver chip to saturate, thereby affecting the finger capacitance C between the finger and the sensor electrode pad ABS Is provided. Therefore, in the related art, only a plug-in touch module with relatively less interference can be used, and it is difficult to apply an embedded touch module with a high integration level to the peep-proof display panel.
In some embodiments, the viewing angle adjusting liquid crystal module 100 includes a first substrate 120, a second substrate 110, and a third polarizer 140 stacked in order, wherein the first substrate 120 and the second substrate 110 form a pair cell structure, and a second liquid crystal layer 130 is disposed between the cells of the pair cell structure.
The viewing angle adjusting liquid crystal module 100 is also called an SVC (Smart View Control Cell, intelligent viewing angle control panel) module, and an optional viewing angle adjusting liquid crystal module 100 adopts positive ECB (electronically controlled birefringence, electrically controlled birefringence) liquid crystal, and when the method is implemented, a certain voltage difference is applied to electrodes at two ends of the liquid crystal, and the change of the viewing angle is adjusted by controlling the deflection state of the liquid crystal, so that the switching between a sharing state and an anti-peeping state is realized.
It was found through testing that if the display liquid crystal module 200 with the in-cell touch module is disposed between the viewing angle adjusting liquid crystal module 100 and the backlight module 300, the viewing angle adjusting liquid crystal module 100 causes a finger capacitance C between the finger and the sensor electrode block ABS Cannot be detected, in this embodiment, the liquid crystal display module 200 is disposed on the side of the viewing angle adjusting liquid crystal module 100 away from the backlight module 300, so as to ensure accurate detection of the finger capacitance C ABS 。
In the technical solution of the present embodiment, the backlight module may refer to an existing or improved backlight module, and the structure of the backlight module is not specifically limited in the present embodiment.
As shown in fig. 4, in one alternative embodiment, the viewing angle adjusting liquid crystal module 100 generally includes a first Polarizer (POL) 110, a second polarizer 120, and a first liquid crystal cell (LC layer) 130.
In implementation, the first substrate 120 and the second substrate 110 are respectively used as the first electrode T1 and the second electrode T2, and drive voltages are applied to two ends of the liquid crystal, and by controlling voltages of different potentials loaded on the drive electrodes T1 and T2, a voltage difference can be generated between two ends of the liquid crystal in the second liquid crystal layer 130, and further the deflection degree of the liquid crystal molecules can be controlled, so that the light emitting angle is adjusted, and the adjustment of the visual viewing angle of the display panel is realized.
As shown in fig. 5, fig. 5 is a VT curve of the 45 ° viewing angle of the viewing angle adjusting liquid crystal module 100 according to one embodiment. The abscissa in fig. 5 represents the voltage difference between the two driving electrodes, and the ordinate represents the light transmittance at a viewing angle of 45 °. It can be seen that the higher the voltage difference between the two electrodes, the higher the light transmittance at the 45 ° viewing angle, that is, the image displayed on the display panel is in a visible state at the 45 ° viewing angle, and at this time, it can be understood that the display panel is presented in a shared state; the lower the voltage difference between the two electrodes, the lower the light transmittance at the 45 ° viewing angle, that is, the lower the amount of light emitted from the display panel at the 45 ° viewing angle, that is, the displayed image is in an invisible state, and at this time, it can be understood that the display panel is in a peep-proof state.
In practice, the voltage difference between the first substrate 120 and the second substrate 110 of the viewing angle adjusting liquid crystal module 100 may be adjusted as required, so as to adjust the viewing angle of the viewing angle adjusting liquid crystal module 100.
In the solution of the present embodiment, the driving electrode of the viewing angle adjusting liquid crystal module 100 is connected to the high-frequency pulse signal line Tx of the embedded touch module, and in the solution of the present embodiment, the high-frequency pulse signal line Tx is also called a transmitting electrode, and is used for providing a high-frequency pulse signal.
In some of the embodiments, the driving electrode of the viewing angle adjusting liquid crystal module 100 includes a first signal terminal for providing a direct current signal and a second signal terminal capable of providing an alternating current signal, and both the first signal terminal and the second signal terminal are connected to the high frequency pulse signal line Tx.
As shown in fig. 4 to 6, in an exemplary embodiment, the signal driving frequency is about 120Hz, and the first signal terminal (SVC-IP) is used to provide a direct current reference signal to the viewing angle adjusting liquid crystal module 100, and in some embodiments, the first signal terminal (SVC-IP) may be implemented by connecting the ground GND.
The second signal terminal (SVC-down) can provide a reference signal or an ac signal of dc to the viewing angle adjusting liquid crystal module 100, as shown in fig. 6, where the ac signal in this embodiment is an ac signal with a potential of ±5.6v.
When the embodiment is implemented, when the first signal terminal (SVC-IP) and the second signal terminal (SVC-down) both provide the reference signal of 0V, the upper and lower electrode potentials are both 0V, at this time, the voltage difference between the two liquid crystal terminals of the viewing angle adjusting liquid crystal module 100 is 0V, the light passing rate under the oblique viewing angle is low, and the display panel can be understood as being in the peep-proof state.
When the first signal terminal (SVC-IP) provides a reference signal of 0V and the second signal terminal (SVC-Down) provides an alternating current signal, the voltage difference between the upper electrode and the lower electrode is + -5.6V, the light passing rate under the oblique viewing angle is higher, and the display panel can be understood to be in the sharing state.
In order to improve the influence of finger touch, the influence of the charge amount consumed by each parasitic capacitance needs to be reduced. In this embodiment, the electrodes of the parasitic capacitances are set to be synchronous modulation.
Specifically, by connecting the driving electrode of the viewing angle adjusting liquid crystal module 100 with the high frequency pulse signal line Tx of the in-cell touch module, a modulation signal synchronized with the high frequency pulse signal supplied from the high frequency pulse signal line Tx can be applied to the driving electrode of the viewing angle adjusting liquid crystal module 100, so that the parasitic capacitance keeps the voltage difference between both ends unchanged, and the parasitic capacitance generated is not charged under the condition that the voltage difference between both ends of the parasitic capacitance is unchanged, thereby completely avoiding the adverse effect caused by the parasitic capacitance consumption charge generated.
As shown in fig. 7, fig. 7 shows an original driving signal, wherein STV (Vertical Start Pluse) is a frame on pulse signal, CLK is a clock signal, source is a high frequency pulse signal, tx is a high frequency pulse signal, SVC-up is a first driving signal provided to a first signal terminal, and SVC-down is a second driving signal provided to a second signal terminal.
With continued reference to fig. 8, fig. 8 shows a modulated driving signal, where after the high-frequency pulse signal Tx is added to the first driving signal and the second driving signal, the actual waveform of the first driving signal is the same as that of the first driving signal, and the second driving signal is added with the high-frequency pulse signal Tx based on the original driving signal.
More specifically, the high-frequency pulse signal of the in-cell touch module is connected to the two driving electrodes of the viewing angle adjusting liquid crystal module 100, so that the signal input to the first driving electrode of the viewing angle adjusting liquid crystal module 100 changes from GND to Tx signal, and the original signal is zero level in the case of the reference signal ground line GND, so that when the high-frequency pulse signal line is connected to the first driving electrode, the Tx signal obtained by the first driving electrode can be understood as the superposition state of GND and Tx.
Since the first signal terminal of the viewing angle adjusting liquid crystal module 100 is connected to the reference signal terminal, for example, the reference signal terminal may be the ground GND, the first signal terminal of the viewing angle adjusting liquid crystal module may be directly connected to the high-frequency pulse signal.
The signal input to the second driving electrode of the viewing angle adjusting liquid crystal module 100 is superimposed with the high frequency pulse signal Tx on the basis of the original signal.
In some of these embodiments, the superposition of the drive signal and the high frequency pulse signal may be achieved by a superposition circuit.
The display panel further includes a superposition circuit, where the second signal end is connected to the high-frequency pulse signal line through the superposition circuit, and the superposition circuit is configured to superimpose the driving signal of the driving signal end and the high-frequency pulse signal provided by the high-frequency pulse signal line, and then provide the superimposed driving signal and the high-frequency pulse signal to the second signal end of the viewing angle adjusting liquid crystal module 100.
In some of these embodiments, as shown in fig. 9, the superposition of the driving signal and the high-frequency pulse signal at the second signal terminal may be implemented by an amplifier superposition circuit. Specifically, the amplifier superimposing circuit includes:
and the output end of the amplifier is connected with the second signal end.
And a first end of the first resistor R1 is connected with the high-frequency pulse signal line, and a second end of the first resistor R1 is connected with the positive electrode of the amplifier.
The first end of the second resistor R2 is connected to the driving signal end of the viewing angle adjusting liquid crystal module 100, and the second end of the first resistor R1 is connected to the positive electrode of the amplifier.
And a first end of the third resistor R3 is connected with the reference signal end GND, and a second end of the third resistor R3 is connected with the negative electrode of the amplifier.
And a first end of the fourth resistor R4 is connected with the negative electrode of the amplifier, and a second end of the fourth resistor R4 is connected with the output end of the amplifier.
The values of the resistors may be set as needed, and may be set to different values such as 500 Ω, 1kΩ, and 2kΩ, for example, to mainly function as a voltage divider.
The power supply positive pole VCC and the power supply negative pole VSS of the amplifier may share AVDD and AVEE, or may share AVDD and GND level, and may be set according to whether Gamma is full positive half voltage or positive and negative voltage in implementation, which is not further limited and described in this embodiment.
As shown in FIG. 9, when the voltages of the resistors are equal, the output voltage U of the superimposing circuit 0 ＝U 1 +U 2 The superposition of the high-frequency pulse signal and the alternating current signal supplied to the second signal terminal can be realized.
After the high-frequency pulse signal is superimposed on the driving signal provided to the second signal end of the viewing angle adjusting liquid crystal module 100, the electric potential of the two polar plates of the parasitic capacitance can be fluctuated along with the fluctuation of the high-frequency pulse signal, that is, the electric voltage difference between the two polar plates of the parasitic capacitance is unchanged, and the parasitic capacitance can not be charged in the touch detection process under the condition that the voltage difference between the two ends of the parasitic capacitance is unchanged, so that the adverse effect caused by the consumed electric charge of the parasitic capacitance can be completely avoided.
The display device of the embodiment of the present invention includes any of the above display panels, so that at least all technical effects of the above display panel embodiments can be achieved, which is not described herein.
The embodiment of the invention provides a control method of a display device, which is applied to the display device.
In one embodiment, the method includes:
providing a high-frequency pulse signal to a driving electrode of the visual angle adjusting liquid crystal module;
detecting whether the output level of a target area corresponding to the embedded touch module meets a preset value or not;
and determining a touch signal corresponding to the target area according to whether the output level of the embedded touch module meets a preset value.
In the technical scheme of the embodiment, by providing the high-frequency pulse signal to the driving electrode of the viewing angle adjusting liquid crystal module, the electric potential of the two polar plates of the parasitic capacitance can be fluctuated along with the fluctuation of the high-frequency pulse signal, namely, the electric voltage difference between the two polar plates of the parasitic capacitance is unchanged, and the parasitic capacitance can not be charged in the touch detection process under the condition that the voltage difference between the two ends of the parasitic capacitance is unchanged, so that the adverse effect caused by the consumed charge of the parasitic capacitance can be completely avoided.
In some embodiments, the driving electrode of the viewing angle adjusting liquid crystal module includes a first signal terminal for providing a direct current signal and a second signal terminal capable of providing an alternating current signal, and the supplying of the high frequency pulse signal to the driving electrode of the viewing angle adjusting liquid crystal module includes:
providing the high frequency pulse signal to the first signal terminal, and
and superposing a driving signal of the driving signal end and the high-frequency pulse signal and providing the superposed driving signal and the high-frequency pulse signal to the second signal end.
As shown in FIG. 10, the diagonal lines on the capacitor represent the value of the capacitor by applying to the viewing angle adjusting LCD module 100The high frequency pulse signal is counteracted, so that the final detection result only maintains the capacitance C between the finger and the touch detection electrode ABS And the touch detection precision is effectively improved.
In the present embodiment, V as shown in FIG. 10 out ＝V mod *C ABS /C f Due to V mod And C f The value of (2) is known, and V out Is measurable, whereby C can be determined ABS Whether the magnitude of the value of (2) satisfies a preset value, thereby determining whether a touch signal exists.
In an exemplary embodiment, the touch trajectory may be displayed by displaying a corresponding image at a position where the touch signal is detected, and the like.
According to the technical scheme, the embedded touch module is adopted, so that the thickness of the module can be effectively reduced, the product is further thinned, meanwhile, the touch module can be designed in the box by adopting a TDDI scheme, the times of product manufacturing procedures and mask (mask exposure etching) processes can be effectively reduced, and the cost can be effectively reduced. Meanwhile, by optimizing the signal driving of the viewing angle adjusting liquid crystal module 100, the detection noise of the touch module is effectively and thoroughly eliminated, and the detection precision is improved.
While the foregoing is directed to the preferred implementation of the disclosed embodiments, it should be noted that numerous modifications and adaptations to those skilled in the art may be made without departing from the principles of the disclosure, and such modifications and adaptations are intended to be within the scope of the disclosure.
Claims (10)
1. The display panel is characterized by comprising a display liquid crystal module, a visual angle adjusting liquid crystal module and a backlight module which are sequentially stacked, wherein the visual angle adjusting liquid crystal module is used for adjusting the visual angle of the display panel, and the display liquid crystal module comprises an embedded touch control module;
the driving electrode of the visual angle adjusting liquid crystal module is connected with the high-frequency pulse signal line of the embedded touch module.
2. The display panel of claim 1, wherein the in-cell touch module is a touch display driver integrated TDDI touch module.
3. The display panel according to claim 1, wherein the driving electrode of the viewing angle adjusting liquid crystal module includes a first signal terminal for supplying a direct current signal and a second signal terminal capable of supplying an alternating current signal, and the first signal terminal and the second signal terminal are connected to the high frequency pulse signal line.
4. The display panel according to claim 3, further comprising a superimposing circuit, wherein the second signal terminal is connected to the high-frequency pulse signal line through the superimposing circuit, and the superimposing circuit is configured to superimpose the driving signal of the driving signal terminal and the high-frequency pulse signal provided by the high-frequency pulse signal line and provide the superimposed driving signal to the second signal terminal of the viewing angle adjusting liquid crystal module.
5. The display panel of claim 4, wherein the superimposing circuit comprises:
the output end of the amplifier is connected with the second signal end;
the first end of the first resistor is connected with the high-frequency pulse signal line, and the second end of the first resistor is connected with the positive electrode of the amplifier;
the first end of the second resistor is connected with the driving signal end of the visual angle adjusting liquid crystal module, and the second end of the first resistor is connected with the positive electrode of the amplifier;
the first end of the third resistor is connected with the reference signal end, and the second end of the third resistor is connected with the negative electrode of the amplifier;
and the first end of the fourth resistor is connected with the negative electrode of the amplifier, and the second end of the fourth resistor is connected with the output end of the amplifier.
6. The display panel of claim 5, wherein the first resistor, the second resistor, the third resistor, and the fourth resistor have equal resistance values.
7. The display panel according to any one of claims 1 to 6, wherein the display liquid crystal module comprises a first polarizer, a color film substrate, an array substrate and a second polarizer which are sequentially stacked, wherein the color film substrate and the array substrate form a box-pair structure, a liquid crystal layer is arranged between boxes of the box-pair structure, and a touch electrode for performing touch detection is arranged on the array substrate.
8. A display device comprising the display panel according to any one of claims 1 to 7.
9. A control method of a display device, characterized by being applied to the display device of claim 8, the method comprising:
providing a high-frequency pulse signal to a driving electrode of the visual angle adjusting liquid crystal module;
detecting whether the output level of a target area corresponding to the embedded touch module meets a preset value or not;
and determining a touch signal corresponding to the target area according to whether the output level of the embedded touch module meets a preset value.
10. The method of claim 9, wherein the driving electrode of the viewing angle adjusting liquid crystal module includes a first signal terminal for providing a direct current signal and a second signal terminal capable of providing an alternating current signal, the supplying a high frequency pulse signal to the driving electrode of the viewing angle adjusting liquid crystal module includes:
providing the high frequency pulse signal to the first signal terminal, and
and superposing a driving signal of the driving signal end and the high-frequency pulse signal and providing the superposed driving signal and the high-frequency pulse signal to the second signal end.
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| CN202410137962.5A CN117761930A (en) | 2024-01-31 | 2024-01-31 | Display panel, display device, and control method of display device |
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| CN202410137962.5A CN117761930A (en) | 2024-01-31 | 2024-01-31 | Display panel, display device, and control method of display device |
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| CN202410137962.5A Pending CN117761930A (en) | 2024-01-31 | 2024-01-31 | Display panel, display device, and control method of display device |
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