Touch display panel, touch display device and touch system

Abstract

The embodiment of the invention provides a touch display panel, a touch display device and a touch system, the touch display panel comprises a first signal transmission structure, the first signal transmission structure is used for transmitting a first non-fixed potential signal, and the first non-fixed potential signal is a display signal; the touch display panel includes an active pen touch mode in which the duty ratio of the first non-fixed potential signal is variable. The influence of noise generated by the first non-fixed potential signal on the working of the active pen can be reduced, and the working performance of the active pen can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and in particular, to a touch display panel, a touch display device, and a touch system. Background Art

[0002] With the popularization of the concept of artificial intelligence display and the popularity of business office work, the interactive needs of customers and consumers for business display products are continuously increasing, and diversified application scenarios also have higher requirements for the touch function of displays.

[0003] In the prior art, in order to improve the operation convenience of users, a touch display panel can be externally attached with an active pen for click input or for performing actions such as writing or drawing on the touch display panel. However, in the existing active pen touch applications, the interference between the display signal and the touch signal is relatively large, which easily leads to abnormal active pen touch. Therefore, a solution is urgently needed. Summary of the Invention

[0004] In view of this, embodiments of the present application provide a touch display panel, a touch display device, and a touch system to solve the above problems.

[0005] In a first aspect, an embodiment of the present application provides a touch display panel, including a first signal transmission structure for transmitting a first non-fixed potential signal, where the first non-fixed potential signal is a signal for display; the touch display panel includes an active pen touch mode, and in the active pen touch mode, the duty cycle of the first non-fixed potential signal is variable.

[0006] In an implementation manner of the first aspect, within one frame of the touch display panel, the first non-fixed potential signal includes a plurality of enable level signals and a plurality of non-enable level signals; wherein, the pulse widths of at least some of the enable level signals are different.

[0007] In an implementation manner of the first aspect, within one frame of the touch display panel, the pulse widths of at least some of the non-enable level signals are different.

[0008] In an implementation manner of the first aspect, within one frame of the touch display panel, the first non-fixed potential signal includes a plurality of enable level signals and a plurality of non-enable level signals; wherein, the pulse widths of each enable level signal are the same, and the pulse widths of at least some of the non-enable level signals are different.

[0009] In an implementation manner of the first aspect, between two adjacent display frame pictures, there is a first type of interval period, and in the active pen touch mode, the durations of at least some of the first type of interval periods are different.

[0010] In an implementation of the first aspect, within one frame of the touch display panel, the duty cycle of the first non-fixed potential signal is fixed or variable.

[0011] In an implementation of the first aspect, the first signal transmission structure includes a first type of signal transmission structure and a second type of signal transmission structure. The first non-fixed potential signal includes a first type of signal and a second type of signal. The first type of signal transmission structure is used to transmit the first type of signal, and the second type of signal transmission structure is used to transmit the second type of signal.

[0012] In an implementation of the first aspect, the first type of signal and the second type of signal are correspondingly arranged. The enable level signal in the first type of signal overlaps at least partially with the enable level signal in the second type of signal. Within one frame of the touch display panel, the first type of signal includes multiple first sub-periods, and the second type of signal includes multiple second sub-periods. Among them, the durations of at least some of the first sub-periods are different from the corresponding second sub-periods.

[0013] In an implementation of the first aspect, the first type of signal is a data voltage signal, and the second type of signal is a scan signal.

[0014] In an implementation of the first aspect, the first non-fixed potential signal includes a scan signal. The touch display panel further includes multiple sequentially transmitted clock signals. The enable level signal in the scan signal corresponds to the enable signals in at least some of the clock signals.

[0015] In an implementation of the first aspect, within one frame period of the touch display panel, it includes multiple clock signal cycle phases. Within one clock signal cycle phase, each clock signal sequentially outputs an enable level signal. Among them, within one clock signal cycle phase, the pulse widths of the enable level signals in at least some of the clock signals are different.

[0016] In an implementation of the first aspect, within one frame period of the touch display panel, it includes multiple clock signal cycle phases. Within one clock signal cycle phase, each clock signal sequentially outputs an enable level signal. Among them, there is a second type of interval period between two adjacent clock signal cycle phases, and the durations of at least some of the second type of interval periods are different.

[0017] In an implementation of the first aspect, the touch display panel further includes a normal display mode. In the normal display mode, the first non-fixed potential signal is a fixed duty cycle signal. In the normal display mode and the active pen touch mode, the refresh frequency of the touch display panel is the same.

[0018] In an implementation of the first aspect, in the active pen touch mode, the total duration of the enable level signal and the non-enable level signal in the first non-fixed potential signal is a fixed value.

[0019] In a second aspect, an embodiment of the present application provides a touch display device, including the touch display panel provided in the first aspect.

[0020] In a third aspect, an embodiment of the present application provides a touch system, including the touch display device provided in the second aspect and an active pen.

[0021] In the embodiment of the present application, by setting the duty cycle of the first non-fixed potential signal for display to be variable, the noise frequency generated by the first non-fixed potential signal can be changed by adjusting the duty cycle of the first non-fixed potential signal, which is beneficial to making the noise frequency generated by the first non-fixed potential signal different from the operating frequency of the active pen, thereby reducing the overlap between the noise and the active pen working period, reducing the impact of the noise on the active pen operation, and further improving the touch performance of the active pen in the active pen touch mode of the touch display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 Schematic diagram of a touch display panel provided in an embodiment of the present application; Figure 2 Schematic diagram of noise affecting the active pen signal in the prior art; Figure 3 Schematic diagram of the correspondence between noise and the active pen signal provided in an embodiment of the present application; Figure 4 Another schematic diagram of the correspondence between noise and the active pen signal provided in an embodiment of the present application; Figure 5 Another schematic diagram of the correspondence between noise and the active pen signal provided in an embodiment of the present application; Figure 6 Another schematic diagram of noise affecting the active pen signal in the prior art; Figure 7 Another schematic diagram of the correspondence between noise and the active pen signal provided in an embodiment of the present application; Figure 8 Another schematic diagram of a touch display panel provided in an embodiment of the present application; Figure 9 Another schematic diagram of the correspondence between noise and the active pen signal provided in an embodiment of the present application; Figure 10Another corresponding schematic diagram of noise and active pen signals provided by an embodiment of the present application; Figure 11 A schematic diagram of a shift register circuit provided by an embodiment of the present application; Figure 12 A corresponding schematic diagram of a clock signal and a scan signal provided by an embodiment of the present application; Figure 13 Another corresponding schematic diagram of noise and active pen signals provided by an embodiment of the present application; Figure 14 Another corresponding schematic diagram of noise and active pen signals provided by an embodiment of the present application; Figure 15 A schematic diagram of a touch display device provided by an embodiment of the present application; Figure 16 A schematic diagram of a touch control system provided by an embodiment of the present application. Detailed implementation manners

[0024] To better understand the technical solutions of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0027] It should be understood that the term " / and / " used herein is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0028] Figure 1 A schematic diagram of a touch display panel provided by an embodiment of the present application.

[0029] Such as Figure 1As shown in the figure, an embodiment of the present application provides a touch display panel 01, which includes a display area AA and a non-display area NA disposed around the display area AA. The display area AA includes a plurality of sub-pixels PX, a plurality of scan signal lines SL, and a plurality of data signal lines DL. The scan signal lines SL extend along a first direction X, and the plurality of scan signal lines SL are arranged along a second direction Y. The first direction X intersects with the second direction Y. The scan signal lines SL are electrically connected to the sub-pixels PX and are used to transmit scan signals to the sub-pixels PX.

[0030] The data signal lines DL extend along the second direction Y, and the plurality of data signal lines DL are arranged along the first direction X. The data signal lines DL are electrically connected to the sub-pixels PX and are used to transmit data voltage signals to the sub-pixels PX.

[0031] Exemplarily, the first direction X is the row direction in the touch display panel 01, and the second direction Y is the column direction in the touch display panel 01.

[0032] The touch display panel 01 further includes a shift register circuit VSR. The shift register circuit VSR can be disposed in the non-display area NA. The shift register circuit VSR is electrically connected to the scan signal lines SL and a clock signal line (not shown in the figure). The clock signal line is used to transmit a clock signal to the shift register circuit VSR. The shift register circuit VSR can, under the control of the received clock signal, sequentially transmit scan signals to the plurality of scan signal lines SL, thereby realizing progressive scanning of the sub-pixels PX.

[0033] During the progressive scanning of the sub-pixels PX, the data signal lines DL sequentially transmit data voltage signals to the corresponding sub-pixels PX, and the sub-pixels PX emit a brightness that meets the requirements based on the received data voltage signals. The scan signals, data voltage signals, clock signals, etc. are all display signals in the touch display panel 01.

[0034] Please continue to refer to Figure 1 , the touch display panel 01 includes a first signal transmission structure 10. The first signal transmission structure 10 is used to transmit a first non-fixed potential signal 20, and the first non-fixed potential signal 20 is a display signal.

[0035] Exemplarily, the first non-fixed potential signal 20 may include at least one of the above scan signals, data voltage signals, and clock signals. Correspondingly, the first signal transmission structure 10 may include at least one of the above shift register circuit VSR, scan signal lines SL, data signal lines DL, and clock signal lines.

[0036] It should be noted that Figure 1Only the shift register circuit VSR is taken as an example of the first signal transmission structure 10 for illustration. The first signal transmission structure 10 can be any structure in the touch display panel 01 that transmits non-fixed potential signals for display. The first non-fixed potential signal 20 can be any non-fixed potential signal for display.

[0037] Among them, the touch display panel 01 includes an active pen touch mode, that is, the touch display panel 01 provided in the embodiments of the present application can be paired with an external active pen for touch. In the active pen touch mode, the duty cycle of the first non-fixed potential signal 20 is variable.

[0038] It can be understood that in the application of the active pen touch, the active pen can send an electromagnetic signal or other wireless signals to the touch display panel. After the touch display panel receives and analyzes the signals sent by the active pen, the touch display panel can have different functions, such as a writing function or an erasing function.

[0039] The inventors of the present application have found through research that noise is generated when the drive signal for display in the touch display panel jumps. When the frequency of the noise overlaps with the working frequency band of the active pen, it will affect the normal operation of the active pen. Moreover, the more the number of overlaps between the noise and the working period of the active pen, the greater the impact of the noise on the working process of the active pen, and the more likely it is to cause abnormal active pen touch.

[0040] In the prior art, the drive signals (such as scan signals, data voltage signals, etc.) in the touch display panel usually have a fixed duty cycle. Once the working frequency band of the active pen includes the frequency at which the drive signal generates noise, the noise will overlap with the working period of the active pen more, seriously affecting the normal operation of the active pen.

[0041] Exemplarily, as Figure 2 shown, Figure 2 FIG. is a schematic diagram of the noise affecting the active pen signal in the prior art. In the prior art, the drive signal 10' for display in the touch display panel is a non-fixed potential signal with a fixed duty cycle. The period of the drive signal 10' is T, then the period of the generated noise 11' is T, and the frequency is 1 / T. Assuming that the working frequency band of the active pen includes the frequency 1 / T, then when the active pen works at the frequency 1 / T, that is, when the working period is T, the period S of the active pen generating the working signal will overlap with the noise 11' more, seriously affecting the normal operation of the active pen. It should be noted that in the drawings of the present application, the non-horizontal parts of the lines indicating the noise are the noise described in the present application.

[0042] In view of this, in the embodiments of the present application, by setting the duty cycle of the first non-fixed potential signal 20 for display to be variable, the noise frequency generated by the first non-fixed potential signal 20 can be changed by adjusting the duty cycle of the first non-fixed potential signal 20. This is conducive to making the noise frequency generated by the first non-fixed potential signal 20 different from the operating frequency of the active pen, thereby facilitating the reduction of the overlap between the noise and the active pen working period, reducing the influence of the noise on the active pen operation, and further facilitating the improvement of the touch performance of the active pen in the active pen touch mode of the touch display panel 01.

[0043] Exemplarily, as Figure 3 shown, Figure 3 FIG. is a corresponding schematic diagram of noise and the active pen signal provided by the embodiments of the present application. Assuming that the operating cycle of the active pen is T and the operating frequency is 1 / T, within a frame period Z of the touch display panel 01, the duty cycle of the first non-fixed potential signal 20 can be changed so that its operating cycle includes T+A, T+B, and T+C, where A, B, and C are all not equal to 0, and any two of A, B, and C are different from each other. Then, the frequencies of the noise 30 generated by the first non-fixed potential signal 20 include 1 / T+A, 1 / T+B, and 1 / T+C. The overlap between the noise 30 and the period S of the active pen generating the working signal is less, which can effectively improve the influence of the noise 30 on the active pen operation.

[0044] Optionally, T+C=T-A-B. In this way, the average cycle of the first non-fixed potential signal 20 can be made T, which is conducive to keeping the overall operating frequency and display time of the touch display panel 01 unchanged while improving the influence of the noise 30 on the active pen operation, and ensuring the display effect in the active pen touch mode.

[0045] In an embodiment of the present application, as Figure 3 shown, within a frame period Z of the touch display panel 01, the first non-fixed potential signal 20 includes a plurality of enable level signals VH (such as high levels) and a plurality of non-enable level signals VL (such as low levels). Taking the first non-fixed potential signal 20 as a scanning signal as an example, the enable level signal VH means that after the enable level signal VH is transmitted to the transistor in the sub-pixel PX, it can control the transistor to turn on; the non-enable level signal VL means that after the non-enable level signal VL is transmitted to the transistor in the sub-pixel PX, it can control the transistor to turn off.

[0046] Among them, the pulse widths of at least some of the enable level signals VH (such as high levels) are different.

[0047] For example, as Figure 3As shown, among multiple enable level signals VH, there are a first enable level signal VH1, a second enable level signal VH2, a third enable level signal VH3, and a fourth enable level signal VH4. The pulse width of the first enable level signal VH1 is W1, the pulse width of the second enable level signal VH2 is W2, the pulse width of the third enable level signal VH3 is W3, and the pulse width of the fourth enable level signal VH4 is W4. W1, W2, W3, and W4 are different from each other.

[0048] In the embodiment of the present application, within a frame period Z of the touch display panel 01, by setting at least the pulse widths of the enable level signals VH to be different, the duty cycle of the first non-fixed potential signal 20 can be made variable, which is beneficial to reducing the influence of the noise generated by the first non-fixed potential signal 20 on the active pen working period.

[0049] It should be noted that when the first non-fixed potential signal 20 is a data voltage signal, the enable level signal VH can be the data voltage signal required by the sub-pixel PX, and the non-enable level signal VL is the transition voltage signal between the data voltage signals required for transmitting two sub-pixels PX.

[0050] In an embodiment of the present application, please continue to refer to Figure 3 , within a frame period Z of the touch display panel 01, at least some of the non-enable level signals VL have different pulse widths.

[0051] For example, as Figure 3 shown, among multiple non-enable level signals VL, there are a first non-enable level signal VL1, a second non-enable level signal VL2, and a third non-enable level signal VL3. The first non-enable level signal VL1 is located between the first enable level signal VH1 and the second enable level signal VH2, and its pulse width is D1. The second non-enable level signal VL2 is located between the second enable level signal VH2 and the third enable level signal VH3, and its pulse width is D2. The third non-enable level signal VL3 is located between the third enable level signal VH3 and the fourth enable level signal VH4, and its pulse width is D3. D1, D2, and D3 are different from each other.

[0052] While setting at least some of the pulse widths of the enable level signals VH to be different, the embodiment of the present application also sets at least some of the pulse widths of the non-enable level signals VL to be different, which is beneficial to improving the flexibility of adjusting the duty cycle of the first non-fixed potential signal 20 while realizing the variable duty cycle of the first non-fixed potential signal 20, and thus is beneficial to further reducing the influence of the noise generated by the first non-fixed potential signal 20 on the active pen working period.

[0053] Figure 4 This is another corresponding schematic diagram of noise and the active pen signal provided by the embodiment of the present application.

[0054] In one embodiment of the present application, as Figure 4 shown, within a frame period Z of the touch display panel 01, the first non-fixed potential signal 20 includes a plurality of enable level signals VH (such as high level signals) and a plurality of non-enable level signals VL (such as low level signals).

[0055] Among them, the pulse widths of the respective enable level signals VH are the same, and at least some of the pulse widths of the non-enable level signals VL are different.

[0056] For example, as Figure 4 shown, among the plurality of enable level signals VH, there are included a first enable level signal VH1, a second enable level signal VH2, a third enable level signal VH3, and a fourth enable level signal VH4. The pulse width of the first enable level signal VH1 is W1, the pulse width of the second enable level signal VH2 is W2, the pulse width of the third enable level signal VH3 is W3, and the pulse width of the fourth enable level signal VH4 is W4, and W1 = W2 = W3 = W4.

[0057] Among the plurality of non-enable level signals VL, there are included a first non-enable level signal VL1, a second non-enable level signal VL2, and a third non-enable level signal VL3. The first non-enable level signal VL1 is located between the first enable level signal VH1 and the second enable level signal VH2, and its pulse width is D1. The second non-enable level signal VL2 is located between the second enable level signal VH2 and the third enable level signal VH3, and its pulse width is D2. The third non-enable level signal VL3 is located between the third enable level signal VH3 and the fourth enable level signal VH4, and its pulse width is D3. D1, D2, and D3 are not the same as each other.

[0058] In the embodiment of the present application, within a frame period Z of the touch display panel 01, by setting at least the pulse widths of the non-enable level signals VL to be different, the duty cycle of the first non-fixed potential signal 20 can be made variable, thereby facilitating reducing the influence of the noise generated by the first non-fixed potential signal 20 on the active pen working period.

[0059] Exemplarily, as Figure 4 shown, assuming that the working frequency of the active pen is 1 / T, within a frame period Z of the touch display panel 01, by setting at least the pulse widths of some of the non-enable level signals to be different, the duty cycle of the first non-fixed potential signal 20 can be changed so that its working cycle includes T + A, T + B, and T + C, where A, B, and C are all not equal to 0, and any two of A, B, and C are not the same. Then the frequencies of the noise 30 generated by the first non-fixed potential signal 20 include 1 / T + A, 1 / T + B, and 1 / T + C. The noise 30 overlaps less with the period S of the working signal generated by the active pen, and the influence of the noise 30 on the active pen working can be effectively improved.

[0060] Meanwhile, within one frame period Z of the touch display panel 01, setting the same pulse width for the enable level signal VH is beneficial to reducing the complexity of the first non-fixed potential signal 20, and thus beneficial to reducing the control difficulty of the touch display panel 01.

[0061] Figure 5 This is another schematic diagram of the correspondence between noise and the active pen signal provided by the embodiment of the present application.

[0062] In an embodiment of the present application, as Figure 5 shown, between two adjacent display frame images includes a first type of interval period G. In the active pen touch mode, the durations of at least some of the first type of interval periods G are different.

[0063] Exemplarily, as Figure 5 shown, the touch display panel 01 includes a plurality of display frames Z, and the plurality of display frames Z include a first display frame Z1, a second display frame Z2, a third display frame Z3, and a fourth display frame Z4 that are sequentially displayed. The touch display panel 01 includes a plurality of first type of interval periods G, and the plurality of first type of interval periods G include a first interval period G1, a second interval period G2, and a third interval period G3. The first interval period G1 is between the first display frame Z1 and the second display frame Z2, the second interval period G2 is between the second display frame Z2 and the third display frame Z3, and the third interval period G3 is between the third display frame Z3 and the fourth display frame Z4. The durations of the first interval period G1, the second interval period G2, and the third interval period G3 are different from each other.

[0064] The inventors of the present application have found through research that in the prior art, as Figure 6 shown, Figure 6 This is another schematic diagram of the influence of noise on the active pen signal in the prior art. A display frame interval G' is provided between two adjacent display frames Z'. The durations of different display frame intervals G' are the same. That is, the driving signal 10' for display not only has a fixed duty cycle within the display frame Z', but also has a fixed duty cycle between multiple display frames Z'. Assuming the period of the multiple display frames Z' is H, the driving signal 10' will also generate noise 11' with a working frequency of 1 / H. When the working period of the active pen corresponding to the display frame Z' is H and the frequency is 1 / H, the overall working period M of the active pen will overlap with the noise 11' more, seriously affecting the normal operation of the active pen.

[0065] Therefore, in the embodiments of the present application, by setting the durations of at least some of the first type of interval periods G to be different, the duty cycle of the first non-fixed potential signal 20 can be made variable among multiple display frames Z, which is beneficial to changing the operating frequency of the display frame Z so that the frequency of the display frame Z is different from the frequency of the active pen, thereby helping to reduce the overlap between the overall operating period of the active pen and the noise and improving the touch performance of the active pen.

[0066] Exemplarily, as Figure 5 shown, assuming that the overall operating cycle of the active pen corresponding to the display frame Z is H and the frequency is 1 / H, during the process of multiple-frame display of the touch display panel 01, by setting the durations of at least some of the first type of interval periods G to be different, the duty cycle of the first fixed potential signal 20 among the display frames Z can be changed, such that the operating cycle of the display frame Z includes H+A, H+B, and H+C, where A, B, and C are all not equal to 0, and any two of A, B, and C are different from each other. Then the frequencies of the noise 30 generated by the first non-fixed potential signal 20 include 1 / (H+A), 1 / (H+B), and 1 / (H+C), and the overlap between the noise 30 and the overall operating period M of the active pen is less, which can effectively reduce the influence of the noise 30 on the operation of the active pen.

[0067] Optionally, H+C = H - A - B. In this way, the average cycle of the display frame Z can be made H, which is beneficial to keeping the overall operating frequency and display time of the touch display panel 01 unchanged while improving the influence of the noise 30 on the operation of the active pen, and ensuring the display effect in the active pen touch mode.

[0068] On the basis of setting the durations of at least some of the first type of interval periods G to be different, within one frame Z of the touch display panel 01, the duty cycle of the first non-fixed potential signal 20 is fixed or variable.

[0069] That is to say, when setting the durations of at least some of the first type of interval periods G between two adjacent display frames Z to be different, within the same display frame Z, the first non-fixed potential signal 20 can be set as a fixed-duty-cycle signal or a variable-duty-cycle signal.

[0070] Exemplarily, as Figure 5As shown, within the same display frame Z, the first non-fixed potential signal 20 is a signal with a fixed duty cycle. At this time, even if the time period S during which the active pen generates a signal overlaps significantly with the noise generated by the first non-fixed potential signal 20 within a display frame Z, since at least the durations of the first type of interval periods G between some adjacent two display frames Z are different, in other display frames Z, the time period S during which the active pen generates a signal will be misaligned with the noise 30 generated by the first non-fixed potential signal 20. Compared with the prior art, overall, the overlap between the noise 30 and the time period S during which the active pen generates a signal can still be reduced, thereby reducing the impact of the noise 30 on the operation of the active pen.

[0071] Moreover, within the same display frame Z, setting the first non-fixed potential signal 20 as a signal with a fixed duty cycle can also reduce the complexity of the first non-fixed potential signal 20, thereby facilitating the reduction of the control difficulty of the touch display panel 01.

[0072] Exemplarily, as Figure 7 shown, Figure 7 FIG. is another corresponding schematic diagram of noise and the active pen signal provided by an embodiment of the present application. Within the same display frame Z, the first non-fixed potential signal 20 is a signal with a variable duty cycle. In this way, it is beneficial to make the noise 30 generated by the first non-fixed potential signal 20 more dispersed, thereby further reducing the overlap between the noise 30 and the time period S during which the active pen generates a signal and reducing the impact of the noise 30 on the operation of the active pen.

[0073] Figure 8 FIG. is another schematic diagram of a touch display panel provided by an embodiment of the present application.

[0074] In an embodiment of the present application, as Figure 8 shown, the first signal transmission structure 10 includes a first type of signal transmission structure 11 and a second type of signal transmission structure 12. The first non-fixed potential signal 20 includes a first type of signal 21 and a second type of signal 22. The first type of signal transmission structure 11 is used to transmit the first type of signal 21, and the second type of signal transmission structure 12 is used to transmit the second type of signal 22.

[0075] Of course, the duty cycles of both the first type of signal 21 and the second type of signal 22 are variable.

[0076] Optionally, as Figure 8 shown, the first type of signal transmission structure 11 is a data signal line DL, and the first type of signal 21 is a data voltage signal. The second type of signal transmission structure 12 is a shift register circuit VSR, and the second type of signal 22 is a scan signal.

[0077] In the embodiments of the present application, the first non-fixed potential signal 20 can be a signal formed by superimposing a first type of signal 21 and a second type of signal 22, and the noise 30 generated by the first non-fixed potential signal 20 can be the superimposed noise generated by the first type of signal 21 and the second type of signal 22.

[0078] Exemplarily, as Figure 9 shown, Figure 9 is another corresponding schematic diagram of noise and the active pen signal provided by the embodiments of the present application. The first type of signal 21 and the second type of signal 22 are correspondingly arranged. The enable level signal (such as a high-level signal) in the first type of signal 21 and the enable level signal (such as a high-level signal) in the second type of signal 22 at least partially overlap. Within one frame Z of the touch display panel 01, the period of the first type of signal 21 is the same as the period of the corresponding second type of signal 22.

[0079] For example, as Figure 9 shown, within one frame Z of the touch display panel 01, the period of the first type of signal 21 includes T+A, T+B, and T+C, and the period of the corresponding second type of signal 22 also includes T+A, T+B, and T+C.

[0080] Based on this setting method, the duty cycles of the first type of signal 21 and the second type of signal 22 can be correspondingly adjusted, so that the noise 30 generated by their superposition overlaps less with the working signal period S of the active pen, thereby reducing the influence of the noise 30 on the active pen operation.

[0081] Moreover, setting the period of the first type of signal 21 to be the same as the period of the corresponding second type of signal 22 can also proportionally adjust the duty cycles of the corresponding first type of signal 21 and second type of signal 22, which is beneficial to reducing the complexity of the first type of signal 21 and the second type of signal 22, and thus beneficial to reducing the control difficulty of the touch display panel 01.

[0082] Exemplarily, as Figure 10 shown, Figure 10 is another corresponding schematic diagram of noise and the active pen signal provided by the embodiments of the present application. The first type of signal 21 and the second type of signal 22 are correspondingly arranged. The enable level signal (such as a high-level signal) in the first type of signal 21 and the enable level signal (such as a high-level signal) in the second type of signal 22 at least partially overlap.

[0083] Within one frame Z of the touch display panel 01, the first type of signal 21 includes multiple first sub-periods, and the second type of signal 22 includes multiple second sub-periods.

[0084] Among them, at least some of the first sub-periods are different from the corresponding second sub-periods.

[0085] For example, as Figure 10As shown, multiple first sub-periods include T+A, T+B, and T+C, where A, B, and C are all not equal to 0, and any two of A, B, and C are different from each other. The corresponding second sub-periods include T+a, T+b, and T+c, where a, b, and c are all not equal to 0, and any two of a, b, and c are different from each other. Among them, T+a, T+b, and T+c respectively correspond to T+A, T+B, and T+C, and A≠a, B≠b, C≠c.

[0086] Optionally, T+C=T - A - B, and T+c=T - a - b.

[0087] Based on this setting method, as Figure 10 shown, the noise 30 generated by the superposition of the first type of signal 21 and the second type of signal 22 is more dispersed, which is beneficial to further reducing the overlap of the noise 30 and the time period S of the signal generated by the active pen, and thus is beneficial to further reducing the influence of the noise 30 on the operation of the active pen.

[0088] In an embodiment of the present application, the first non-fixed potential signal 20 includes a scan signal GOUT, and the touch display panel 01 further includes a plurality of sequentially transmitted clock signals CK. The enable level signal (such as a high-level signal) in the scan signal GOUT corresponds to the enable level signal (such as a high-level signal) in at least part of the clock signals CK. The pulse width of the enable level signal in the clock signal CK can affect the pulse width of the enable level signal in the corresponding scan signal GOUT.

[0089] Optionally, the enable level signal (such as a high-level signal) in the scan signal GOUT can project the enable level signal (such as a high-level signal) in each clock signal CK.

[0090] Exemplarily, as Figure 11 shown, Figure 11 is a schematic diagram of a shift register circuit provided by an embodiment of the present application. The first signal transmission structure 10 includes a shift register circuit VSR. The shift register circuit VSR includes a plurality of cascaded shift register units VR. The plurality of shift register units VR can sequentially output scan signals SOUT for controlling one row of sub-pixels PX. The scan signal GOUT output by the shift register circuit VSR in the present application can be understood as a projection set in time of the scan signals SOUT output by each shift register unit VR.

[0091] As Figure 11As shown, the shift register circuit VSR can be electrically connected to multiple clock signal lines CL. Exemplarily, a shift register unit VR can be electrically connected to two clock signal lines CL. Among them, the signal transmitted by one clock signal line CL can be used as the reset signal SET of the shift register unit VR, and the signal transmitted by the other clock signal line CL can be used as the clock signal CK of the shift register unit VR. The scan signal output by the shift register unit VR can map the received clock signal CK.

[0092] Exemplarily, as Figure 11 shown, among the multiple clock signal lines CL, there are a first clock signal line CL1, a second clock signal line CL2, a third clock signal line CL3, and a fourth clock signal line CL4. The signals transmitted by the first clock signal line CL1, the second clock signal line CL2, the third clock signal line CL3, and the fourth clock signal line CL4 are sequentially used as the reset signals SET of the respective shift register units VR. The signals transmitted by the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2 are sequentially used as the clock signals CK of the respective shift register units VR.

[0093] Among them, as Figure 12 shown, Figure 12 is a corresponding schematic diagram of the clock signal and the scan signal provided by the embodiment of the present application. The scan signal GOUT output by the shift register circuit VSR can sequentially project the enable level signals (such as high level signals) in the clock signals CK transmitted by the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2.

[0094] In the embodiment of the present application, by setting the pulse widths of the enable level signals (such as high level signals) in different clock signals CK to be different, it is possible to make the scan signal GOUT include enable level signals (such as high level signals) with multiple different pulse widths, thereby realizing the variability of the duty cycle of the scan signal GOUT, making the scan signal GOUT include multiple different operating frequencies, and further reducing the influence of the noise generated by the scan signal GOUT on the normal operation of the active pen.

[0095] Optionally, the duty cycle of the same clock signal CK can be fixed to reduce the control difficulty of the clock signal CK. Of course, the duty cycle of the same clock signal CK can also be set to be variable to increase the cycle diversity of the scan signal GOUT and further disperse the noise generated by the scan signal GOUT.

[0096] Figure 13 is another corresponding schematic diagram of the noise and the active pen signal provided by the embodiment of the present application.

[0097] In an embodiment of the present application, asFigure 13 As shown, in one frame Z of the touch display panel 01, it includes multiple clock signal cycle phases L. Within one clock signal cycle phase L, each clock signal CK sequentially outputs an enable level signal (such as a high level signal).

[0098] Exemplarily, in one clock signal cycle phase L, the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2 sequentially transmit the enable level signal (such as a high level signal) in the clock signal CK.

[0099] Among them, within one clock signal cycle phase L, the pulse widths of the enable level signals (such as high level signals) in at least some of the clock signals CK are different.

[0100] In the embodiments of the present application, by setting the pulse widths of the enable level signals (such as high level signals) in different clock signals CK to be different, it is possible to make the scan signal GOUT include enable level signals (such as high level signals) with a variety of different pulse widths, thereby realizing the variability of the duty cycle of the scan signal GOUT, making the scan signal GOUT include a variety of different operating frequencies, and further reducing the influence of the noise generated by the scan signal GOUT on the normal operation of the active pen.

[0101] Such as Figure 13 As shown, the first non-fixed potential signal 20 further includes a data voltage signal Data. To ensure the correctness of data writing of the sub-pixel PX, the enable level signal (such as a high level signal) in the data voltage signal Data is located within the enable level signal (such as a high level signal) of the corresponding scan signal GOUT. The working cycle of the data voltage signal Data is the same as that of the corresponding scan signal GOUT.

[0102] Optionally, the working cycle of the active pen is T. By setting the pulse widths of the enable level signals (such as high level signals) in different clock signals CK to be different, it can be made that within the same clock signal cycle phase L, the working cycles of the scan signal GOUT include T + a, T + b, T - a - b, where neither a nor b is equal to 0. The working cycle of the data voltage signal Data corresponds to and is the same as that of the scan signal GOUT. The working cycles of the scan signal GOUT in two adjacent clock signal cycle phases L can be T.

[0103] Optionally, a second type of interval period gap is included between two adjacent clock signal cycle phases L. In one frame Z, the durations of each second interval period gap are the same. This is to reduce the complexity of the first non-fixed potential signal 20, thereby reducing the control difficulty of the touch display panel 01.

[0104] Thus, the noise 30 generated by the data voltage signal Data and the scan signal GOUT overlaps less with the period S of the active pen generating the working signal, which is beneficial to improving the touch performance of the active pen.

[0105] Figure 14 This is another corresponding schematic diagram of noise and the active pen signal provided by the embodiment of the present application.

[0106] In an embodiment of the present application, as Figure 14 shown, in a frame Z of the touch display panel 01, it includes multiple clock signal cycle stages L. Within one clock signal cycle stage L, each clock signal CK sequentially outputs an enable level signal (such as a high-level signal).

[0107] Exemplarily, in one clock signal cycle stage L, the third clock signal line CL3, the fourth clock signal line CL4, the first clock signal line CL1, and the second clock signal line CL2 sequentially transmit the enable level signal (such as a high-level signal) in the clock signal CK.

[0108] Among them, between two adjacent clock signal cycle stages L, it includes a second type of interval period gap, and the durations of at least some of the second type of interval periods gap are different.

[0109] Exemplarily, as Figure 14 shown, among multiple clock signal cycle stages L, it includes a first clock signal cycle stage L1, a second clock signal cycle stage L2, and a third clock signal cycle stage L3 in sequence. A frame Z of the touch display panel 01 includes multiple second type of interval periods gap. Among the multiple second type of interval periods gap, it includes an interval period gap1 and an interval period gap2. The interval period gap1 is located between the first clock signal cycle stage L1 and the second clock signal cycle stage L2, and the interval period gap2 is located between the second clock signal cycle stage L2 and the third clock signal cycle stage L3. The durations of the interval period gap1 and the interval period gap2 are different.

[0110] In the embodiment of the present application, by setting the durations of at least some of the second type of interval periods gap to be different, in a frame Z, it can make the scan signal GOUT have a variable duty cycle between multiple clock signal cycle stages L, which is beneficial to changing the working frequency of the clock signal cycle stage L, so that within at least some of the clock signal cycle stages L, the noise generated by the scan signal GOUT overlaps less with the period S of the active pen generating the working signal, thereby reducing the influence of the noise on the operation of the active pen.

[0111] Optionally, as Figure 14As shown, within the same clock signal cycle phase L, the pulse widths of the enable level signals (such as high level) in each clock signal CK are the same, and the scan signal GOUT can have a fixed duty cycle within one clock signal cycle phase L. At this time, even if the time period S when the active pen generates a signal overlaps significantly with the noise generated by the scan signal GOUT within one clock signal cycle phase L, due to the different durations of the second type of interval period gap between at least some adjacent two clock signal cycle phases L, in other clock signal cycle phases L, the time period S when the active pen generates a signal will be misaligned with the noise 30 generated by the scan signal GOUT, still significantly reducing the overlap between the noise 30 and the time period S when the active pen generates a signal, thereby reducing the impact of the noise 30 on the operation of the active pen.

[0112] Exemplarily, as Figure 14 shown, the period between the first clock signal cycle phase L1 and the second clock signal cycle phase L2 of the scan signal GOUT is T + a, and the period between the second clock signal cycle phase L2 and the third clock signal cycle phase L3 is T - a. There is a phase difference of the scan signal GOUT between different clock signal cycle phases L. Assume that within the same clock signal cycle phase L, the working period of the scan signal GOUT is the same as that of the active pen. For example, the working periods of both are T. Even if the time period S when the active pen generates a signal overlaps significantly with the noise generated by the scan signal GOUT within one clock signal cycle phase L, such as the time period S when the active pen generates a signal overlaps significantly with the noise 30 generated by the scan signal GOUT within the first clock signal cycle phase L1, due to the phase difference between different clock signal cycle phases L, within the second clock signal cycle phase L2 and the third clock signal cycle phase L3, the time period S when the active pen generates a signal will be misaligned with the noise 30 generated by the scan signal GOUT, thereby reducing the impact of the noise 30 on the operation of the active pen.

[0113] In addition, within the same clock signal cycle phase L, setting the pulse widths of the enable level signals (such as high level) in each clock signal CK to be the same is also beneficial to reducing the complexity of the clock signal CK and beneficial to reducing the control difficulty of the touch display panel 01.

[0114] Optionally, within the same clock signal cycle phase L, the pulse widths of at least some of the clock signals CK with enable level signals (such as high level) can also be set to be different. In this way, it is beneficial to make the noise 30 generated by the scan signal GOUT more dispersed, thereby further reducing the overlap between the noise 30 and the time period S when the active pen generates a signal and reducing the impact of the noise 30 on the operation of the active pen.

[0115] In an embodiment of the present application, the touch display panel 01 further includes a normal display mode. In the normal display mode, the first non-fixed potential signal 20 is a signal with a fixed duty cycle.

[0116] Wherein, in the normal display mode and the active pen touch mode, the refresh frequencies of the touch display panel 01 are the same. Here, the same refresh frequencies of the touch display panel 01 mean that within a certain period, the total number of times the first non-fixed potential signal 20 transmits an enable level signal is the same. For example, in the normal display mode and the active pen touch mode, the total number of times the first non-fixed potential signal 20 transmits an enable level signal within one frame Z is the same.

[0117] In the embodiment of the present application, setting the same refresh frequencies of the touch display panel 01 in the normal display mode and the active pen touch mode is beneficial to reducing the display differences of the touch display panel 01 in the normal display mode and the active pen touch mode and improving the user experience.

[0118] Optionally, in the active pen touch mode, as Figure 3 and Figure 4 shown, the total duration of the enable level signal VH and the non-enable level signal VL in the first non-fixed potential signal 20 is a fixed value.

[0119] Based on this setting method, in the active pen touch mode, it is beneficial to flexibly adjust the duty cycle of the first non-fixed potential signal 20 so as to greatly reduce the influence of noise on the normal operation of the active pen. At the same time, it is also beneficial to keep the display duration and the refresh frequency of the touch display panel 01 unchanged within a certain period and ensure the display effect in the active pen touch mode.

[0120] Figure 15 It is a schematic diagram of a touch display device provided by an embodiment of the present application.

[0121] The embodiment of the present application provides a touch display device 02. As Figure 15 shown, the touch display device 02 includes the touch display panel 01 provided in the above embodiment. Exemplarily, the touch display device 02 can be an electronic device such as a mobile phone, a tablet computer, a learning machine, etc., and the present application does not make specific limitations.

[0122] In the touch display device 02, if the duty ratio of the first non-fixed potential signal 20 for display is set to be variable, then by adjusting the duty ratio of the first non-fixed potential signal 20, the noise frequency generated by the first non-fixed potential signal 20 can be changed, which is beneficial to making the noise frequency generated by the first non-fixed potential signal 20 different from the operating frequency of the active pen. Thus, it is beneficial to reduce the overlap between the noise and the operating period of the active pen, reduce the influence of the noise on the operation of the active pen, and further improve the touch performance of the active pen in the active pen touch mode of the touch display panel 01.

[0123] Figure 16 It is a schematic diagram of a touch system provided by an embodiment of the present application.

[0124] As Figure 16 shown, an embodiment of the present application provides a touch system 100. The touch system 100 includes a touch display device 02 and an active pen 03. The active pen 03 can send an electromagnetic signal or other wireless signals to the touch display panel 01 in the touch display device 02. After the touch display panel 01 receives and analyzes the signals sent by the active pen, the touch display panel can have different functions, such as a writing function or an erasing function.

[0125] In the touch system 100, if the duty ratio of the first non-fixed potential signal 20 for display is set to be variable, then by adjusting the duty ratio of the first non-fixed potential signal 20, the noise frequency generated by the first non-fixed potential signal 20 can be changed, which is beneficial to making the noise frequency generated by the first non-fixed potential signal 20 different from the operating frequency of the active pen 03. Thus, it is beneficial to reduce the overlap between the noise and the operating period of the active pen 03, reduce the influence of the noise on the operation of the active pen 03, and further improve the touch performance of the active pen 03 in the active pen touch mode of the touch display panel 01.

[0126] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A touch display panel, characterized in that, It includes a first signal transmission structure for transmitting a first non-fixed potential signal, and the first non-fixed potential signal is a signal for display. The touch display panel includes an active pen touch mode, and in the active pen touch mode, the duty cycle of the first non-fixed potential signal is variable.

2. The touch display panel according to claim 1, wherein Within one frame of the touch display panel, the first non-fixed potential signal includes a plurality of enable level signals and a plurality of non-enable level signals. Among them, the pulse widths of at least some of the enable level signals are different.

3. The touch display panel according to claim 2, wherein Within one frame of the touch display panel, the pulse widths of at least some of the non-enable level signals are different.

4. The touch display panel according to claim 1, wherein, Within one frame of the touch display panel, the first non-fixed potential signal includes a plurality of enable level signals and a plurality of non-enable level signals. Among them, the pulse widths of each of the enable level signals are the same, and the pulse widths of at least some of the non-enable level signals are different.

5. The touch display panel according to claim 1, characterized in that, There is a first type of interval period between two adjacent display frame pictures. In the active pen touch mode, the durations of at least some of the first type of interval periods are different.

6. The touch display panel according to claim 5, wherein Within one frame of the touch display panel, the duty cycle of the first non-fixed potential signal is fixed or variable.

7. The touch display panel according to claim 1, wherein, The first signal transmission structure includes a first type of signal transmission structure and a second type of signal transmission structure. The first non-fixed potential signal includes a first type of signal and a second type of signal. The first type of signal transmission structure is used to transmit the first type of signal, and the second type of signal transmission structure is used to transmit the second type of signal.

8. The touch display panel according to claim 7, wherein The first type of signal and the second type of signal are correspondingly arranged, and the enable level signals in the first type of signal overlap at least partially with the enable level signals in the second type of signal. Within one frame of the touch display panel, the first type of signal includes a plurality of first sub-periods, and the second type of signal includes a plurality of second sub-periods. Among them, the durations of at least some of the first sub-periods are different from the corresponding second sub-periods.

9. The touch display panel according to claim 7, wherein, The first type of signal is a data voltage signal, and the second type of signal is a scan signal.

10. The touch display panel according to claim 1, wherein, The first non-fixed potential signal includes a scan signal. The touch display panel further includes a plurality of sequentially transmitted clock signals. The enable level signals in the scan signal correspond to the enable signals in at least some of the clock signals.

11. The touch display panel according to claim 10, wherein, One frame of the touch display panel includes a plurality of clock signal cycle stages. Within one clock signal cycle stage, each of the clock signals sequentially outputs an enable level signal. Among them, within one clock signal cycle stage, the pulse widths of the enable level signals in at least some of the clock signals are different.

12. The touch display panel according to claim 10, wherein One frame of the touch display panel includes a plurality of clock signal cycle stages. Within one clock signal cycle stage, each of the clock signals sequentially outputs an enable level signal. Among them, there is a second type of interval period between two adjacent clock signal cycle stages, and the durations of at least some of the second type of interval periods are different.

13. The touch display panel according to claim 1, wherein The touch display panel further includes a conventional display mode. In the conventional display mode, the first non-fixed potential signal is a signal with a fixed duty cycle. In the conventional display mode and the active pen touch mode, the refresh frequency of the touch display panel is the same.

14. The touch display panel according to claim 1, wherein, In the active pen touch mode, the total duration of the enable level signal and the non-enable level signal in the first non-fixed potential signal is a fixed value.

15. A touch display device, characterized in that, Comprising the touch display panel according to any one of claims 1-14.

16. A touch control system, characterized in that, Comprising the touch display device and the active pen according to claim 15.

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