Touch method for turning on and off an electronic whiteboard
By setting up a PCB and cross-wire structure in the electronic whiteboard and using the analog electronic switch CD4051 to detect touch coordinates, the problem of accidental shutdown or startup caused by accidental touch of the electronic whiteboard is solved, user-customized touch settings are realized, and the convenience and flexibility of operation are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGZHOU LANGO ELECTRONICS TECH CO LTD
- Filing Date
- 2023-03-31
- Publication Date
- 2026-06-02
AI Technical Summary
Electronic whiteboards are prone to accidental shutdown or startup due to accidental touches, resulting in data interruption or display cessation, affecting ease of operation. Furthermore, different application scenarios require different touch control methods.
By setting up a PCB and cross-wire structure in the electronic whiteboard, using the analog electronic switch CD4051 to detect touch coordinates, and combining phase-by-phase and symmetrical detection methods to calculate touch coordinates, precise on/off control is achieved.
It offers user-customizable touch settings, reducing the impact of accidental operation, improving operational convenience and flexibility, and adapting to different usage needs.
Smart Images
Figure CN116360633B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of electronic whiteboard technology, specifically to a touch control method for turning an electronic whiteboard on and off. Background Technology
[0002] The electronic whiteboard is a relatively new product. It is a high-tech product developed by combining cutting-edge electronic technology, software technology and other high-tech methods. Combined with a computer and projector, it can realize paperless office and teaching. It can be written directly with a pen like a regular whiteboard or blackboard and then input into the computer. Compared with projectors and regular whiteboards, electronic whiteboards have their own advantages.
[0003] With the development of technology, electronic whiteboards have been gradually applied in many fields. However, electronic whiteboards often have some inconveniences during use. Users often accidentally touch them during operation. If the electronic whiteboard is suddenly turned off or on during use, it will cause data interruption or stop display, which will make it inconvenient for staff to operate and use. In addition, different touch methods may be required in different application scenarios. Summary of the Invention
[0004] To achieve the aforementioned ease of use, the present invention provides the following technical solution: a touch control method for turning an electronic whiteboard on and off, comprising the following steps:
[0005] S1. Obtain the coordinates of the touch switch
[0006] By clicking the "Create New Touch Switch Area" button in the electronic whiteboard, the coordinates required to create the touch switch area are saved to the driver. Then, select "Set Touch Switch Area" and "Add Touch Switch Area" in sequence to modify and adjust the set touch switch coordinates.
[0007] S2. Storage and modification of touch coordinates
[0008] A PCB is set inside the electronic whiteboard, and the PCB is composed of two sets of horizontal (Y-axis) and vertical (X-axis) intersecting wires. Then, when the user operates it, the following situations will occur: 1. When the touch detects the coil on the X and Y axes, the switch CD4051 at the corresponding position on the circuit board will output a high or low level to control the coil on the X and Y axes to be turned on or off. 2. When the touch detects that the coil on the X and Y axes has not been touched, the touch detection device will not output any signal. At this time, the output terminal of the analog electronic switch CD4051 is directly grounded, and the touch detection device will not be touched.
[0009] S3, Touchscreen power drive circuit
[0010] When the touch detection device detects that the touch panel is not being touched, the touch screen power drive circuit will not start; when the touch detection device detects that the touch panel is being touched, the touch screen power drive circuit will start. When the touch detection device detects that a button on the touch panel is not pressed during the test, the touch screen power drive circuit will stop working, and the analog electronic switch CD4051 will switch from low level to high level to turn on the screen.
[0011] S4, Touch Switch Coordinate Recognition
[0012] When a user touches the electronic whiteboard, the LCD display control chip receives control signals from the touchscreen controller and sends corresponding control commands to the corresponding channels. Simultaneously, the detection device senses the touch signal. For example, when the touch point is point P, an electromagnetic signal is sensed on the coil, causing the signal at the detection point to change from zero to a non-zero value. Similarly, the coil's Y-axis is scanned. By scanning the Y-axis again, two voltage values, Vm and Vm+1, can be detected at Ym and Ym+1. These two voltage values correspond to two current values, Vm and Vn, and Vm+1 and Vm+2, respectively. By connecting the four detected voltage values to four positions, the three-phase current can be calculated. The touch coordinates can be calculated using the four detected voltage values Vn, Vn+1, Vm, and Vm+1. The touch coordinates are then detected using phase-by-phase detection and symmetrical detection methods. If the touch coordinates match the set "on" coordinates, an "on" operation is performed; if the touch coordinates match the set "off" coordinates, a "off" operation is performed.
[0013] Preferably, in step S2, each set of intersecting wires is insulated from each other; one end of the wire is grounded, and the other end is connected to the input terminal of the analog electronic switch CD4051 in the touch screen controller via FPC, and the number of coils in the X and Y axis directions is determined according to the size of the display.
[0014] Preferably, in step S2, the touch detection device consists of 35 coils along the X-axis and 30 coils along the Y-axis.
[0015] Preferably, in step S3, when the touch screen power drive circuit stops working, the analog electronic switch CD4051 will output a low level.
[0016] Preferably, in step S4, the touch signal is detected using a time-division scanning method, and when the touch sensing device performs a touch operation on a certain row on the display screen, a dot-shaped image will appear on the display screen. If this image dot is compared with the button at the corresponding position, when the dot-shaped image positions corresponding to the two buttons are different, the displayed content at the corresponding position on the screen will change.
[0017] Preferably, in step S4, the coordinate positions of the coil are Xn, Xn+1 and Ym, Ym+1.
[0018] Preferably, in step S4, when the three-phase current is unbalanced, the voltage value of each phase can be calculated by scanning the three-phase voltmeter; when the voltage of a certain phase deviates too much from the normal range, the three-phase current will be unbalanced.
[0019] Preferably, in step S4, the phase detection method is as follows: each phase has only one detection point (such as phase A), and the symmetrical detection method is as follows: the deviation of a certain phase of the three-phase current from the normal value is set to the minimum, so that the difference between the phase and the normal value is minimized. In practical applications, it is very difficult to minimize the deviation of a certain phase from the normal value. Alternatively, the deviation of a certain phase from the normal value can be set to the maximum.
[0020] Compared with the prior art, the present invention provides a touch control method for turning an electronic whiteboard on and off, which has the following advantages:
[0021] 1. The touch control method for turning the electronic whiteboard on and off allows users to select the method to turn off the whiteboard through touch settings. This makes it more convenient for users to use the whiteboard. When users need to perform certain operations, such as drawing or writing, they can do so by turning off the touch control method. It is very convenient to turn off the touch control method during use to reduce the impact on the screen.
[0022] 2. The touch control method for turning the electronic whiteboard on and off can be customized by the user according to their needs. Users can also switch the functions of the electronic whiteboard by clicking function buttons, such as clicking the whiteboard button to switch functions or clicking an area to switch functions. This makes it more convenient for users to operate. If users have any special needs while using the whiteboard and need to perform certain operations, they can do so by clicking the function buttons, making it easier to complete certain operations. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the invention process structure. Detailed Implementation
[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] Please see Figure 1 This invention provides a technical solution: a touch control method for turning an electronic whiteboard on and off, comprising the following steps:
[0026] S1. Obtain the coordinates of the touch switch
[0027] By clicking the "Create New Touch Switch Area" button in the electronic whiteboard, the coordinates required to create the touch switch area are saved to the driver. Then, select "Set Touch Switch Area" and "Add Touch Switch Area" in sequence to modify and adjust the set touch switch coordinates.
[0028] S2. Storage and modification of touch coordinates
[0029] A PCB is set inside the electronic whiteboard, and the PCB is composed of two sets of horizontal (Y-axis) and vertical (X-axis) intersecting wires. Then, when the user operates it, the following situations will occur: 1. When the touch detects the coil on the X and Y axes, the switch CD4051 at the corresponding position on the circuit board will output a high or low level to control the coil on the X and Y axes to be turned on or off. 2. When the touch detects that the coil on the X and Y axes has not been touched, the touch detection device will not output any signal. At this time, the output terminal of the analog electronic switch CD4051 is directly grounded, and the touch detection device will not be touched.
[0030] S3, Touchscreen power drive circuit
[0031] When the touch detection device detects that the touch panel is not being touched, the touch screen power drive circuit will not start; when the touch detection device detects that the touch panel is being touched, the touch screen power drive circuit will start. When the touch detection device detects that a button on the touch panel is not pressed during the test, the touch screen power drive circuit will stop working, and the analog electronic switch CD4051 will switch from low level to high level to turn on the screen.
[0032] S4, Touch Switch Coordinate Recognition
[0033] When a user touches the electronic whiteboard, the LCD display control chip receives control signals from the touchscreen controller and sends corresponding control commands to the corresponding channels. Simultaneously, the detection device senses the touch signal. For example, when the touch point is point P, an electromagnetic signal is sensed on the coil, causing the signal at the detection point to change from zero to a non-zero value. Similarly, the coil's Y-axis is scanned. By scanning the Y-axis again, two voltage values, Vm and Vm+1, can be detected at Ym and Ym+1. These two voltage values correspond to two current values, Vm and Vn, and Vm+1 and Vm+2, respectively. By connecting the four detected voltage values to four positions, the three-phase current can be calculated. The touch coordinates can be calculated using the four detected voltage values Vn, Vn+1, Vm, and Vm+1. The touch coordinates are then detected using phase-by-phase detection and symmetrical detection methods. If the touch coordinates match the set open coordinates, an open operation is performed; if the touch coordinates match the set close coordinates, a close operation is performed.
[0034] Furthermore, in step S2, each set of intersecting wires is insulated from each other; one end of the wire is grounded, and the other end is connected to the input terminal of the analog electronic switch CD4051 in the touch screen controller via the FPC, and the number of coils in the X and Y axis directions is determined according to the size of the display.
[0035] Furthermore, in step S2, the touch detection device consists of 35 coils along the X-axis and 30 coils along the Y-axis.
[0036] Furthermore, in step S3, when the touch screen power drive circuit stops working, the analog electronic switch CD4051 will output a low level.
[0037] Furthermore, in step S4, the touch signal is detected using a time-division scanning method, and when the touch sensing device performs a touch operation on a certain row of the display screen, a dot-shaped image will appear on the display screen. If this image dot is compared with the button at the corresponding position, when the dot-shaped image positions corresponding to the two buttons are different, the displayed content at the corresponding position on the screen will change.
[0038] Furthermore, in step S4, the coordinate positions of the coil are Xn, Xn+1 and Ym, Ym+1.
[0039] Furthermore, in step S4, when the three-phase current is unbalanced, the voltage value of each phase can be calculated by scanning the three-phase voltmeter; when the voltage of a certain phase deviates too much from the normal range, the three-phase current will be unbalanced.
[0040] Furthermore, in step S4, the phase detection method is as follows: each phase has only one detection point (such as phase A), and the symmetrical detection method is as follows: the deviation of a certain phase of the three-phase current from the normal value is set to the minimum, so that the difference between the phase and the normal value is minimized. In practical applications, it is very difficult to minimize the deviation of a certain phase from the normal value. Alternatively, the deviation of a certain phase from the normal value can be set to the maximum.
[0041] The electronic whiteboard can be turned on and off via touch. Users can choose the touch method to turn off the whiteboard through touch settings, which makes it more convenient for users. When using the whiteboard, if users need to perform certain operations, such as drawing or writing, they can do so by turning off the touch method. It is very convenient to turn off the touch method during use to reduce the impact on the screen.
[0042] The touch control method for turning the electronic whiteboard on and off can be customized by the user according to their needs. Users can also switch the functions of the electronic whiteboard by clicking function buttons, such as clicking the whiteboard button to switch functions or clicking an area to switch functions. This makes it more convenient for users to operate. When using the whiteboard, if there are any special needs that require certain operations, users can achieve them by clicking the function buttons, making it easier to complete certain operations during use.
[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A touch control method for turning an electronic whiteboard on and off, characterized in that, Includes the following steps: S1. Obtain the coordinates of the touch switch By clicking the "Create New Touch Switch Area" button in the electronic whiteboard, the coordinates required to create the touch switch area are saved to the driver. Then, select "Set Touch Switch Area" and "Add Touch Switch Area" in sequence to modify and adjust the set touch switch coordinates. S2. Storage and modification of touch coordinates A PCB is set inside the electronic whiteboard, and the PCB is composed of two sets of horizontal (Y-axis) and vertical (X-axis) intersecting wires. Then, when the user operates it, the following situations will occur:
1. When the touch detects the coil on the X and Y axes, the switch CD4051 at the corresponding position on the circuit board will output a high or low level to control the coil on the X and Y axes to be turned on or off.
2. When the touch detects that the coil on the X and Y axes has not been touched, the touch detection device will not output any signal. At this time, the output terminal of the analog electronic switch CD4051 is directly grounded, and the touch detection device will not be touched. S3, Touchscreen power drive circuit When the touch detection device detects that the touch panel is not being touched, the touch screen power drive circuit will not start; when the touch detection device detects that the touch panel is being touched, the touch screen power drive circuit will start; when the touch detection device detects that the touch panel button is not pressed during the test, the touch screen power drive circuit will stop working, and the analog electronic switch CD4051 will switch from low level to high level to turn on the screen. S4, Touch Switch Coordinate Recognition When a user touches the electronic whiteboard, the LCD display control chip receives control signals from the touchscreen controller and sends corresponding control commands to the corresponding channels. Simultaneously, the detection device senses the touch signal. When the touch point is point P, an electromagnetic signal is sensed on the coil, causing the signal at the detection point to change from zero to a non-zero value. Similarly, the coil's Y-axis is scanned. Two voltage values, Vm and Vm+1, are detected at Ym and Ym+1, respectively. These voltage values correspond to two current values, Vm and Vn, and Vm+1 and Vm+2. By connecting the four detected voltage values to four positions, the three-phase current can be calculated. The touch coordinates can be calculated using the four detected voltage values Vn, Vn+1, Vm, and Vm+1. The touch coordinates are then detected using phase-by-phase detection and symmetrical detection methods. If the touch coordinates match the set open coordinates, an open operation is performed; if the touch coordinates match the set close coordinates, a close operation is performed.
2. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S2, each set of intersecting wires is insulated from each other; one end of the wire is grounded, and the other end is connected to the input terminal of the analog electronic switch CD4051 in the touch screen controller through the FPC, and the number of coils in the X and Y axis directions is determined according to the size of the display.
3. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S2, the touch detection device consists of 35 coils along the X-axis and 30 coils along the Y-axis.
4. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S3, when the touch screen power drive circuit stops working, the analog electronic switch CD4051 will output a low level.
5. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S4, the touch signal is detected by time-division scanning. When the touch sensing device performs a touch operation on a certain row on the display screen, a dot-shaped image will appear on the display screen. If the dot image is compared with the button at the corresponding position, when the dot image positions of the two buttons are different, the display content at the corresponding position on the screen will change.
6. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S4, the coordinate positions of the coil are Xn, Xn+1 and Ym, Ym+1.
7. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S4, when the three-phase current is unbalanced, the voltage value of each phase is calculated by scanning the three-phase voltmeter; when the voltage of a certain phase deviates too much from the normal range, the three-phase current will be unbalanced.
8. The touch control method for turning an electronic whiteboard on and off according to claim 1, characterized in that, In step S4, the phase detection method is as follows: each phase has only one detection point, and the symmetrical detection method is as follows: the deviation of a certain phase of the three-phase current from the normal value is set to the minimum, so that the difference between the phase and the normal value is minimized.