Uplink signal transmission method of touch screen and touch input device

Abstract

The invention discloses an uplink signal transmission method of a touch screen and touch input equipment, the touch screen comprises a plurality of first sensing electrodes and a plurality of second sensing electrodes orthogonal to the first sensing electrodes, and the first sensing electrodes and the second sensing electrodes are used for transmitting touch signals and obtaining detection signals; the uplink signal transmission method comprises the following steps: in a touch detection time period of a current period, when it is determined that the hand and the active pen touch the touch screen at the same time according to a detection signal, obtaining a target area touched by the active pen on the touch screen; and in the signal transmission time period of the current period, controlling a sensing electrode of the target area to transmit an uplink signal so as to enable the active pen to receive the uplink signal. According to the invention, the uplink signal cannot be distorted due to grounding attenuation, so that the accuracy of detecting the position of the active pen by the touch screen is improved.

Description

Technical Field

[0001] This application relates to the field of touch technology, specifically to an uplink signal transmission method for a touch screen and a touch input device. Background Technology

[0002] Currently, touch systems include a touchscreen and an active stylus. When using the active stylus for touch operations, the touchscreen detects the touch position of the active stylus to complete the interaction between the two. The touchscreen interacts by transmitting uplink signals to the active stylus.

[0003] In existing touchscreen applications, scenarios often involve simultaneous touch from both the stylus and the user's hand. For example, interaction might be achieved by simultaneously touching the touchscreen with both the stylus and the finger, or by the user touching the touchscreen while holding the stylus. In these scenarios, the hand touch can cause distortion in the uplink signal transmission, thus reducing the accuracy of the touchscreen's stylus position detection. Summary of the Invention

[0004] Therefore, this application provides an uplink signal transmission method and a touch input device for a touch screen, which improves the accuracy of the touch screen in detecting the position of the active stylus. The technical solution of this application is as follows: The first aspect of this application provides an uplink signal transmission method for a touchscreen, the touchscreen including multiple first sensing electrodes and multiple second sensing electrodes orthogonal to the first sensing electrodes, the first sensing electrodes and the second sensing electrodes being used to transmit touch signals and acquire detection signals; the uplink signal transmission method includes: during a touch detection time period of the current cycle, determining, based on the detection signal, that when the hand and the active pen simultaneously touch the touchscreen, acquiring a target area on the touchscreen touched by the active pen; and during a signal transmission time period of the current cycle, controlling the sensing electrodes of the target area to transmit uplink signals so that the active pen receives the uplink signals.

[0005] In one embodiment of this application, the uplink signal transmission method further includes: during the touch detection time period of the current cycle, when it is determined from the detection signal that only the active pen touches the touch screen, determining the entire area of ​​the touch screen as the target area.

[0006] In one embodiment of this application, controlling the uplink signal transmission of the sensing electrode in the target area includes: controlling the first sensing electrode in the target area to transmit the uplink signal; and / or controlling the second sensing electrode in the target area to transmit the uplink signal.

[0007] In one embodiment of this application, when the target area is the area touched by the active pen, the uplink signal is a first voltage amplitude; when the target area is the entire area, the uplink signal is a second voltage amplitude; the first voltage amplitude is less than the second voltage amplitude.

[0008] In one embodiment of this application, the first sensing electrode is a transmitting electrode, and the second sensing electrode is a receiving electrode; controlling the sensing electrode of the target area to transmit an uplink signal includes: determining the touch position of the active pen based on the detection signal; acquiring the target transmitting electrode corresponding to the touch position in the target area; and controlling the target transmitting electrode to transmit the uplink signal.

[0009] In one embodiment of this application, controlling the sensing electrode of the target area to transmit the uplink signal further includes: acquiring a target receiving electrode corresponding to the touch position in the target area; and controlling the target receiving electrode to transmit the uplink signal.

[0010] A second aspect of this application provides a touch input device, including a touch screen and a touch chip. The touch screen includes multiple first sensing electrodes and multiple second sensing electrodes orthogonal to the first sensing electrodes. The first and second sensing electrodes are used to transmit touch signals and acquire detection signals. The touch chip is connected to the first and second sensing electrodes. The touch chip is used to: during a touch detection time period of the current cycle, determine, based on the detection signals, when the hand and the active pen simultaneously touch the touch screen, acquire the target area touched by the active pen on the touch screen; and during a signal transmission time period of the current cycle, control the sensing electrodes of the target area to transmit uplink signals so that the active pen receives the uplink signals.

[0011] In one embodiment of this application, the touch chip is further configured to: during the touch detection time period of the current cycle, determine the entire area of ​​the touch screen as the target area when it is determined from the detection signal that only the active pen touches the touch screen.

[0012] In one embodiment of this application, when the target area is the area touched by the active pen, the uplink signal is a first voltage amplitude; when the target area is the entire area, the uplink signal is a second voltage amplitude; the first voltage amplitude is less than the second voltage amplitude.

[0013] In one embodiment of this application, the first sensing electrode is a transmitting electrode, and the second sensing electrode is a receiving electrode; the touch chip is further configured to: determine the touch position of the active pen based on the detection signal; obtain the target transmitting electrode corresponding to the touch position in the target area; and control the target transmitting electrode to transmit the uplink signal.

[0014] This application embodiment determines that the hand and the active pen touch the touch screen simultaneously based on the detection signal during the touch detection period, and obtains the target area touched by the active pen on the touch screen based on the detection signal. During the signal transmission period, it controls the sensing electrode of the target area to transmit the uplink signal. Since there is no large area of ​​the target area in contact with the user's hand, the uplink signal will not be distorted due to excessive grounding attenuation, thereby improving the accuracy of the touch screen in detecting the position of the active pen. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a scenario where a hand and an active pen simultaneously touch a touchscreen, as provided in an embodiment of this application.

[0016] Figure 2 This is a flowchart illustrating an uplink signal transmission method provided in an embodiment of this application.

[0017] Figure 3 This is a flowchart illustrating another uplink signal transmission method provided in an embodiment of this application.

[0018] Figure 4 This is a schematic diagram illustrating the process of transmitting uplink signals through sensing electrodes in a target area, as provided in an embodiment of this application.

[0019] Figure 5 This is a schematic diagram illustrating another process for controlling the transmission of uplink signals by the sensing electrodes in a target area, provided in an embodiment of this application.

[0020] Figure 6 This is a schematic block diagram of a touch input device provided in an embodiment of this application. Detailed Implementation

[0021] It should be noted that in the embodiments of this application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and drawings of this application are used to distinguish similar objects, not to describe a specific order or sequence.

[0022] It should also be noted that the methods disclosed in the embodiments of this application or the methods shown in the flowcharts include one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged, and some steps can also be deleted.

[0023] Currently, touch systems include a touchscreen and an active stylus. When using the active stylus for touch operations, the touchscreen detects the touch position of the active stylus to complete the interaction between the two. The touchscreen interacts by transmitting uplink signals to the active stylus.

[0024] In existing touchscreen applications, scenarios often involve simultaneous touch from both the stylus and the user's hand. For example, interaction might be achieved by simultaneously touching the touchscreen with both the stylus and the finger, or by the user touching the touchscreen while holding the stylus. In these scenarios, the hand touch can cause distortion in the uplink signal transmission, thus reducing the accuracy of the touchscreen's stylus position detection.

[0025] This application provides an uplink signal transmission method and a touch input device for a touch screen, which improves the accuracy of the touch screen in detecting the position of the active pen.

[0026] Please refer to Figure 1 , Figure 1 This is a schematic diagram illustrating a scenario where a hand and an active pen simultaneously touch a touchscreen, as provided in an embodiment of this application.

[0027] In this embodiment, scenario 10 includes a touchscreen 100, an active pen 101, and a hand 102. The touchscreen 100 includes multiple first sensing electrodes 110 and multiple second sensing electrodes 120 orthogonal to the first sensing electrodes 110. The first sensing electrodes 110 and second sensing electrodes 120 are used to transmit touch signals and acquire detection signals. The touchscreen 100 can also transmit uplink signals to the active pen 101 through the sensing electrodes and receive downlink signals transmitted by the active pen 101 through the sensing electrodes, thereby completing the communication interaction between the touchscreen 100 and the active pen 101.

[0028] The uplink signal includes synchronization information, various commands for controlling the active pen 101, and configuration information. The synchronization information is used to synchronize the time slots between the touchscreen 100 and the active pen 101. When the user's hand 102 and the active pen 101 simultaneously touch the touchscreen 100, the grounding impedance of the touchscreen 100 changes, causing the uplink signal to attenuate and resulting in uplink signal output distortion.

[0029] Next, combined Figure 2 This application provides an embodiment of an uplink signal transmission method, please refer to [reference needed]. Figure 2 Specifically, it includes the following steps: Step S21: During the touch detection time period of the current cycle, when the hand and the active pen touch the touch screen at the same time, the target area touched by the active pen on the touch screen is obtained based on the detection signal.

[0030] In this embodiment of the application, the touch screen also includes a touch chip, which is connected to a first sensing electrode and a second sensing electrode. By transmitting a driving signal to the first sensing electrode and receiving a detection signal from the second sensing electrode, the touch position of the touch control can be obtained according to the detection signal. Furthermore, the touch position can be determined as either a user's hand or an active pen based on the signal characteristics of the detection signal at the touch position.

[0031] Specifically, during the touch detection period of the current cycle, the touch chip determines the target area touched by the active pen on the touchscreen when both the hand and the active pen touch the touchscreen simultaneously, based on the signal characteristics of the detection signal. For example, the touch chip first determines the touch area of ​​the active pen based on the detection signal, and then determines the corresponding target area based on the sensing electrodes of the touch area of ​​the active pen on the touchscreen.

[0032] Step S22: During the signal transmission time period of the current cycle, control the sensing electrode of the target area to transmit an uplink signal so that the active pen can receive the uplink signal.

[0033] In this embodiment, the control cycle of the touch chip includes a touch detection time period and a signal transmission time period. During the touch detection time period, the touch chip detects touch control side touch points through the first sensing electrode and the second sensing electrode. During the signal transmission time period, the touch chip communicates and interacts with the active pen through the first sensing electrode and the second sensing electrode.

[0034] In this process, the touch chip determines that the hand and the active pen touch the touch screen at the same time during the touch detection period. After obtaining the target area touched by the active pen, it controls the sensing electrodes of the target area to transmit uplink signals, while other areas do not transmit uplink signals, so that the active pen can receive uplink signals through the sensing electrodes of the target area.

[0035] It is understood that the embodiments of this application determine that the hand and the active pen touch the touch screen at the same time according to the detection signal during the touch detection period, and obtain the target area touched by the active pen on the touch screen according to the detection signal. During the signal transmission period, the sensing electrodes of the target area are controlled to transmit the uplink signal. Since the user's hand does not touch the target area, the uplink signal will not be distorted due to ground attenuation, thereby improving the accuracy of the touch screen in detecting the position of the active pen.

[0036] In some embodiments, the transmission of uplink signals by the sensing electrodes in the control target area includes: the transmission of uplink signals by a first sensing electrode in the control target area; and / or the transmission of uplink signals by a second sensing electrode in the control target area. The first sensing electrode may be a transmitting electrode, and the second sensing electrode may be a receiving electrode. Alternatively, the first sensing electrode may be a receiving electrode, and the second sensing electrode may be a transmitting electrode.

[0037] For example, the touch chip can control the transmitting electrode in the target area to transmit uplink signals, or the touch chip can control the receiving electrode in the target area to transmit uplink signals, or the touch chip can control both the transmitting and receiving electrodes in the target area to transmit uplink signals.

[0038] Please refer to Figure 3 , Figure 3 A flowchart illustrating another uplink signal transmission method provided in this application embodiment, specifically including the following steps: Step S31: During the touch detection time period of the current cycle, when the hand and the active pen touch the touch screen at the same time, the target area touched by the active pen on the touch screen is obtained based on the detection signal.

[0039] Step S32: During the signal transmission time period of the current cycle, control the sensing electrode of the target area to transmit an uplink signal so that the active pen can receive the uplink signal.

[0040] In this embodiment of the application, steps S31 to S32 are the same as step S22, and will not be repeated here.

[0041] Step S33: During the touch detection time period of the current cycle, if it is determined from the detection signal that only the active pen touches the touch screen, the entire area of ​​the touch screen is determined as the target area.

[0042] In this embodiment, during the touch detection period of the current cycle, the touch chip determines that only an active pen touches the touch screen based on the signal characteristics of the detection signal. Then, it divides the entire area of ​​the touch screen into a target area so as to transmit uplink signals through the sensing electrodes of the entire screen.

[0043] In some embodiments, when the target area is the area touched by the active pen, the uplink signal is a first voltage amplitude. When the target area is the entire area, the uplink signal is a second voltage amplitude. The first voltage amplitude is less than the second voltage amplitude. It can be understood that when the target area is the area touched by the active pen, using a higher first voltage amplitude to transmit the uplink signal can increase the effective radiated power of the uplink signal and further reduce the distortion caused by the attenuation of the uplink signal.

[0044] In some embodiments, the first sensing electrode is a transmitting electrode and the second sensing electrode is a receiving electrode, then as follows: Figure 4 As shown, the steps for controlling the uplink signal transmission of the sensing electrodes in the target area may specifically include: Step S41: Determine the touch position of the active pen based on the detection signal.

[0045] Step S42: Obtain the target transmitting electrode corresponding to the touch position in the target area.

[0046] Step S43: Control the target transmitting electrode to transmit uplink signals.

[0047] It is understandable that when the touch position of the active pen is within the target area, the touch chip can also determine the touch position of the active pen based on the detection signal, obtain the target transmitting electrode corresponding to the touch position of the active pen, and control the target transmitting electrode to transmit the uplink signal so that the uplink signal can be radiated to the active pen more effectively, further reducing signal distortion.

[0048] In some embodiments, such as Figure 5 As shown, the step of controlling the uplink signal transmission of the sensing electrodes in the target area may further include: Step S44: Obtain the target receiving electrode corresponding to the touch position in the target area.

[0049] Step S45: Control the target receiving electrode to transmit the uplink signal.

[0050] In this embodiment, the touch chip can control the target receiving electrode and the target receiving electrode corresponding to the touch position of the active pen to transmit uplink signals simultaneously, so as to improve the amplitude and effective radiation power of the uplink signal and further reduce the distortion caused by the attenuation of the uplink signal.

[0051] Please refer to Figure 6 , Figure 6 This is a schematic block diagram of a touch input device provided in an embodiment of this application. The touch input device 600 includes a touchscreen 610 and a touch chip 620.

[0052] In this embodiment, the touch screen 610 includes multiple first sensing electrodes and multiple second sensing electrodes orthogonal to the first sensing electrodes. The first sensing electrodes and the second sensing electrodes are used to transmit touch signals and acquire detection signals. The touch chip 620 is connected to the first sensing electrodes and the second sensing electrodes.

[0053] The touch chip 620 is used to: during the touch detection period of the current cycle, determine the target area touched by the active pen on the touch screen 610 when the hand and the active pen touch the touch screen 610 simultaneously based on the detection signal; and during the signal transmission period of the current cycle, control the sensing electrodes of the target area to transmit uplink signals so that the active pen can receive the uplink signals.

[0054] In some embodiments, the touch chip 620 is further configured to: during the touch detection time period of the current cycle, when it is determined from the detection signal that only an active pen touches the touch screen 610, determine the entire area of ​​the touch screen 610 as the target area.

[0055] In some embodiments, when the target area is the area touched by the active pen, the uplink signal is a first voltage amplitude. When the target area is the entire area, the uplink signal is a second voltage amplitude. The first voltage amplitude is less than the second voltage amplitude.

[0056] In some embodiments, the first sensing electrode is a transmitting electrode, and the second sensing electrode is a receiving electrode. The touch chip 620 is further configured to: determine the touch position of the active pen based on the detection signal, obtain the target transmitting electrode corresponding to the touch position in the target area, and control the target transmitting electrode to transmit an uplink signal.

[0057] In this embodiment, the beneficial effects of the touch input device 600 can be referred to the beneficial effects of the uplink signal transmission method of the touch screen 610 in the foregoing embodiment, and will not be repeated here.

[0058] This application embodiment also provides a computer storage medium storing a computer program. When the computer program is executed by a processor, the processor executes the above-described uplink signal transmission method of the touch screen 610.

[0059] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer storage medium or transmitted through the computer storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital versatile discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0060] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks. Unless otherwise specified, the technical features of this embodiment and its implementation can be combined arbitrarily.

[0061] The embodiments described above are merely preferred embodiments of this application and are not intended to limit the scope of this application. Any modifications and improvements made by those skilled in the art to the technical solutions of this application without departing from the spirit of this application should fall within the protection scope defined by the claims of this application.

Claims

1. A method for transmitting uplink signals to a touchscreen, characterized in that, The touch screen includes multiple first sensing electrodes and multiple second sensing electrodes orthogonal to the first sensing electrodes. The first sensing electrodes and the second sensing electrodes are used to transmit touch signals and acquire detection signals. The uplink signal transmission method includes: During the current touch detection period, when the hand and the active pen touch the touch screen simultaneously based on the detection signal, the target area touched by the active pen on the touch screen is obtained. During the signal transmission period of the current cycle, the sensing electrodes of the target area are controlled to transmit uplink signals so that the active pen can receive the uplink signals.

2. The uplink signal transmission method as described in claim 1, characterized in that, Also includes: During the current touch detection period, if it is determined from the detection signal that only the active pen touches the touch screen, the entire area of ​​the touch screen is determined as the target area.

3. The uplink signal transmission method as described in claim 1, wherein controlling the sensing electrode of the target region to transmit the uplink signal includes: Control the first sensing electrode in the target area to transmit the uplink signal; and / or The second sensing electrode in the target area is controlled to transmit the uplink signal.

4. The uplink signal transmission method as described in claim 2, characterized in that, When the target area is the area touched by the active pen, the uplink signal is a first voltage amplitude; when the target area is the entire area, the uplink signal is a second voltage amplitude. The first voltage amplitude is less than the second voltage amplitude.

5. The uplink signal transmission method as described in claim 1, characterized in that, The first sensing electrode is a transmitting electrode, and the second sensing electrode is a receiving electrode; The sensing electrode controlling the target area transmits an uplink signal, including: The touch position of the active pen is determined based on the detection signal; Obtain the target transmitting electrode corresponding to the touch position in the target area; Control the target transmitting electrode to transmit the uplink signal.

6. The uplink signal transmission method as described in claim 5, characterized in that, The method for controlling the uplink signal transmission of the sensing electrode in the target area further includes: Obtain the target receiving electrode corresponding to the touch position in the target area; Control the target receiving electrode to transmit the uplink signal.

7. A touch input device, characterized in that, The device includes a touch screen and a touch chip. The touch screen includes multiple first sensing electrodes and multiple second sensing electrodes orthogonal to the first sensing electrodes. The first sensing electrodes and the second sensing electrodes are used to transmit touch signals and acquire detection signals. The touch chip is connected to the first sensing electrodes and the second sensing electrodes. The touch chip is used for: During the current touch detection period, when the hand and the active pen touch the touch screen simultaneously based on the detection signal, the target area touched by the active pen on the touch screen is obtained. During the signal transmission period of the current cycle, the sensing electrodes of the target area are controlled to transmit uplink signals so that the active pen can receive the uplink signals.

8. The touch input device as described in claim 7, characterized in that, The touch chip is also used for: During the current touch detection period, if it is determined from the detection signal that only the active pen touches the touch screen, the entire area of ​​the touch screen is determined as the target area.

9. The touch input device as claimed in claim 8, characterized in that, When the target area is the area touched by the active pen, the uplink signal is a first voltage amplitude; when the target area is the entire area, the uplink signal is a second voltage amplitude. The first voltage amplitude is less than the second voltage amplitude.

10. The touch input device as claimed in claim 8, characterized in that, The first sensing electrode is a transmitting electrode, and the second sensing electrode is a receiving electrode; The touch chip is also used for: The touch position of the active pen is determined based on the detection signal; Obtain the target transmitting electrode corresponding to the touch position in the target area; Control the target transmitting electrode to transmit the uplink signal.

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