CN104793776A - Electronic drawing board, handwriting pen and method for inputting and displaying handwriting information through electronic drawing board - Google Patents

Abstract

The invention provides an electronic drawing board, a handwriting pen and a method for inputting and displaying handwriting information through the electronic drawing board. The electronic drawing board is used for displaying and inputting the handwriting information, and comprises an input board, the handwriting pen, a plurality of sensors and a display device. Pressure data are produced by pressing the pressure sensors so that the handwriting information can be input. Color data are produced through a color adaptor. A microcontroller converts the pressure data and the color data into wireless signals. The sensors at the corresponding positions receive the wireless signals and convert the wireless signals into control signals. The display device is used for displaying the handwriting information according to the control signals and the positions of the sensors. The electronic drawing board does not need to be connected with the computer through a data line. The electronic drawing board is small in product size and convenient to carry, has a color selecting function and can display various colors.

Description

Electronic drawing board, stylus and method for inputting and displaying handwritten information on electronic drawing board

technical field

The invention relates to the field of electronic display, in particular to an electronic drawing board, a stylus and a method for inputting and displaying handwritten information on the electronic drawing board.

Background technique

When the existing electronic drawing board inputs handwritten information, most of them sense the position of the stylus and report it to the computer. After the computer processes the position information, it controls the display device of the electronic drawing board to display the input handwritten information. Existing electronic drawing boards need to be connected with computers through data lines, which makes the existing electronic drawing boards inconvenient to carry, and the existing electronic drawing boards do not have the function of changing colors.

Contents of the invention

In order to solve the above problems, the present invention provides an electronic drawing board, a stylus and a method for inputting and displaying handwritten information on the electronic drawing board which is easy to carry and has a color selection function.

An electronic drawing board provided in a specific embodiment of the present invention is used for displaying and inputting handwritten information. The electronic drawing board includes: an input board, the input board is provided with an input area; a stylus, and the stylus includes a pressure sensor When the stylus presses the first position of the input area of the input board, the pressure sensor is used to generate pressure data to input the handwritten information, and the color adjuster is used for Generate color data, the microcontroller is used to convert the pressure data and the color data into wireless signals; several sensors, the sensors are two-dimensionally adjacently arranged and correspond to the input area of the input board, so When the stylus presses the first position of the input area of the input board, the sensor corresponding to the first position receives the wireless signal and converts the wireless signal into a control signal; and the display device, the The display device is provided with a display area, and the display device is used for controlling a second position of the display area to display the handwritten information according to the control signal and the first position.

Preferably, the microcontroller includes two digital-to-analog converters and a sending module, the digital-to-analog converters are used to respectively convert the pressure data and the color data into pen pressure digital signals and color voltage digital signals, The sending module is used for converting the pen voltage digital signal and the color voltage digital signal into wireless signals.

Preferably, the microcontroller further includes two comparators and two memory units, the two comparators are respectively used to continuously store the pressure data and the color data by generating interrupts, thereby continuously generating the pressure data and the color data, the memory unit is used to store the pen pressure digital signal and the color voltage digital signal respectively.

Preferably, the display device includes a control device and a display panel, the display panel is provided with the display area, the control device is used to convert the control signal and the first position into a display signal, and the display The board displays the handwritten information at the second position of the display area according to the display signal, wherein the control signal includes pen pressure value and input color value, and the display signal includes the coordinates of the second position, Pen thickness value and display color value.

Preferably, the input board is transparent glass, the input board covers the display board, the display area overlaps with the input area, the first position overlaps with the second position, and the several A sensor is arranged directly behind the display area of the display panel, and the sending module is arranged directly behind the pressure sensor.

Preferably, after a predetermined number of the sensors receive the wireless signal and convert the wireless signal into the control signal, the control device is used to analyze the control signal and describe in the control signal The control signal is converted into the display signal when the value of the pen pressure exceeds a predetermined value.

Preferably, the display device further includes a storage device, the storage device is used to store the display signal, and the electronic drawing board further includes an electronic eraser, and the electronic eraser is used to delete the information stored in the storage device by sending an erase signal. display signal to clear the handwritten information displayed in the display panel.

Preferably, the sending module is an infrared transmitter, the sensor is an infrared sensor, and the wireless signal is an infrared signal.

Preferably, the display panel is an LED or LCD, and a display screen of the LED or LCD forms the display area.

A specific embodiment of the present invention also provides a stylus for inputting handwritten information on the input board of the electronic drawing board to display on the display device of the electronic drawing board. The stylus includes a pressure sensor, a color adjuster and Microcontroller, when the stylus presses the input board, the pressure sensor is used to generate pressure data to input the handwritten information, the color adjuster is used to generate color data, and the microcontroller is used to use the The pressure data and the color data are converted into wireless signals so that the sensor at the pressing position of the tablet of the electronic drawing board receives the wireless signals, so as to control the display device of the electronic drawing board to display the handwritten information according to the wireless signals.

Preferably, the microcontroller includes two digital-to-analog converters and a sending module, the digital-to-analog converters are used to respectively convert the pressure data and the color data into pen pressure digital signals and color voltage digital signals, The sending module is used for converting the pen voltage digital signal and the color voltage digital signal into wireless signals.

Preferably, the microcontroller further includes two comparators and two memory units, the comparators are used to respectively interrupt the sending of the pen voltage digital signal and the color voltage digital signal to the sending module, the The memory unit is used for storing the pen voltage digital signal and the color voltage digital signal.

Preferably, the sending module is an infrared transmitter, the sending module is arranged directly behind the pressure sensor, and the wireless signal is an infrared signal.

A specific embodiment of the present invention also provides a method for inputting and displaying handwritten information on an electronic drawing board, the electronic drawing board is provided with a stylus, and the method includes: setting an input area, a display area and several a sensor, the sensors are two-dimensionally adjacently arranged and correspond to the input area; the stylus presses the first position of the input area to generate pressure data; the stylus generates color data; the stylus will The pressure data and the color data are converted into wireless signals; the sensor corresponding to the first position receives the wireless signal and converts the wireless signal into a control signal; and the electronic drawing board according to the control signal and The first position controls the second position of the display area to display the handwritten information.

Preferably, converting the pressure data and color data into wireless signals by the stylus specifically includes: converting the pressure data and the color data into pen pressure voltage digital signals and color voltage digital signals respectively; The pen voltage digital signal and the color voltage digital signal are converted into wireless signals.

Preferably, before converting the pressure data and the color data into the pen pressure digital signal and the color voltage digital signal, it further includes: respectively storing the pressure data and the color data once in two comparators; After said respectively converting said pressure data and said color data into pen pressure voltage digital signal and color voltage digital signal, it also includes: storing said pen pressure voltage digital signal and said color voltage digital signal; After the voltage digital signal and the color voltage digital signal are converted into wireless signals, it also includes: judging whether all the comparators are interrupted, and if all the comparators are interrupted, continue to store the pressure data in the two comparators and the color data.

Preferably, the electronic drawing board controlling the second position of the display area to display the handwritten information according to the control signal and the first position specifically includes: converting the control signal and the first position into a display signal and displaying the handwritten information at the second position of the display area according to the display signal, wherein the control signal includes a pen pressure value and an input color value, and the display signal includes a second position coordinate , stroke thickness value and display color value.

Preferably, the display area overlaps with the input area, the first position overlaps with the second position, and the plurality of sensors are arranged behind the display area.

Preferably, the sensor corresponding to the first position receives the wireless signal and converting the wireless signal into a control signal specifically includes: judging whether a predetermined number of the sensors have received the wireless signal; converting the wireless signal into a control signal; and converting the control signal and the first position into a display signal specifically includes: judging whether the pen pressure value in the control signal exceeds a predetermined value; When the value of the pen pressure in the signal exceeds a predetermined value, the control signal is converted into a display signal.

Preferably, after converting the control signal and the first position into a display signal, it further includes: storing the display signal; After displaying the handwritten information, it further includes: judging whether an erasing signal is received, and if the erasing signal is received, deleting the display signal in the storage device to clear the handwritten information displayed in the display area.

Preferably, the sensor is an infrared sensor, and the wireless signal is an infrared signal.

Preferably, the display area is a display screen of LED or LCD.

The electronic drawing board, the stylus, and the method for inputting and displaying handwritten information on the electronic drawing board of the present invention generate pressure data by pressing the pressure sensor to input the handwritten information, the color adjuster generates color data, and the microcontroller converts the pressure data and The color data is converted into a wireless signal, and the sensor at the corresponding position receives the wireless signal and converts the wireless signal into a control signal, and the display device displays the handwritten information according to the control signal and the position of the sensor without passing data The product is small in size, easy to carry, and has a color selection function, which can display multiple colors.

Description of drawings

FIG. 1 is a system structure diagram of an electronic drawing board in an embodiment of the present invention.

FIG. 2 is a schematic diagram of an input board and a sensor of the electronic drawing board in FIG. 1 .

FIG. 3 is a system structure diagram of the stylus of the electronic drawing board in FIG. 1 .

FIG. 4 is a system structure diagram of the microcontroller of the stylus in FIG. 3 .

FIG. 5 is a system structure diagram of an electronic drawing board in an embodiment of the present invention.

FIG. 6 is a system structure diagram of an electronic eraser and a display device of an electronic drawing board in an embodiment of the present invention.

FIG. 7 is a first flow chart of a method for inputting and displaying handwritten information on an electronic drawing board in an embodiment of the present invention.

FIG. 8 is a flow chart 1 of the method for converting pressure data and color data into a wireless signal in FIG. 7 .

FIG. 9 is a second flow chart of the method for converting pressure data and color data into wireless signal tools in FIG. 7 .

FIG. 10 is a flowchart of a method for controlling the second position of the display area to display the handwritten information according to the control signal and the first position in FIG. 7 .

FIG. 11 is the second flow chart of the method for inputting and displaying handwritten information on the electronic drawing board in FIG. 7 .

Fig. 12 is a flowchart of a method for deleting and displaying handwritten information by an electronic eraser of an electronic drawing board in an embodiment of the present invention.

Description of main component symbols

stylus 10 Pressure Sensor 11 microcontroller 12 Digital to Analog Converter 121 sending module 122 Comparators 123 memory unit 124 color adjuster 13 sensor 20 input board 30 display screen 40 control device 41 display board 42 storage device 43 electronic eraser 50

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

The electronic drawing board and the method for displaying handwritten input information on the electronic drawing board in the present invention will be further described in detail below in conjunction with the accompanying drawings.

FIG. 1 is a system structure diagram of an electronic drawing board in a specific embodiment of the present invention. The electronic drawing board of the present embodiment is used for displaying and inputting handwritten information, including an input board 30, a stylus 10, several sensors 20 and a display device 40, wherein the input board 30 is provided with an input area, and the display device 40 is provided with a display area .

The stylus 10 includes a pressure sensor 11, a color adjuster 13, and a microcontroller 12. When the stylus 10 presses the first position of the input area of the input board 30, the pressure sensor 11 is used to generate pressure data for input For the handwritten information, the color adjuster 13 is used to generate color data, and the microcontroller 12 is used to convert the pressure data and color data into wireless signals.

The sensors 20 are two-dimensionally adjacently arranged and correspond to the input area of the input board 30. When the stylus 10 presses the first position of the input area of the input board 30, the sensor 20 corresponding to the first position receives the wireless signal and convert the wireless signal into a control signal.

The display device 40 is configured to control the second position of the display area to display the handwritten information according to the control signal and the first position.

Specifically, when handwriting input information, the stylus 10 is pressed against the input area of the input board 30 and generates physical pressure, and according to the piezoelectric effect, the pressure sensor 11 of the stylus 10 senses the physical pressure to generate pressure data, and sends the pressure data sent to the microcontroller 12.

After the pressure sensor 11 of the stylus 10 generates pressure data, the color adjuster 13 in the stylus 10 starts to generate color data, and the color data is a color voltage signal. In this embodiment, the pen body of the stylus 10 has red The three color selection buttons of green and blue are for the user to choose. When the three color selection buttons of red, green and blue are pressed separately, the color adjuster 13 outputs the corresponding red, green, and blue voltage signals to the microcontroller 12. When the blue three color selection buttons are pressed multiple times or simultaneously, according to the synthesis rule of RGB (Red Green Blue) three primary colors, the color adjuster 13 outputs the corresponding color voltage signal to the microcontroller 12, for example, when the three colors of red, green and blue are selected The buttons are pressed at the same time, the color adjuster 13 outputs red, green and blue voltage signals to the microcontroller 12, when the red and green color selection buttons are pressed simultaneously but the blue selection button is not pressed, the color adjuster 13 outputs red and green voltages signal to the microcontroller 12. Since the stylus 10 has the color adjuster 13 , the stylus 10 has the ability to match the three primary colors of RGB, which can be combined according to the requirements of the displayed colors, so that the user can choose a variety of colors.

Please refer to FIG. 2 , in this embodiment, the sensors 20 are two-dimensionally adjacently arranged in M rows and N columns, and correspond to the input area of the input board 30 , when the stylus 10 presses the input area of the input board 30 , define the pressing position as the first position, at this time the sensor 20 corresponding to the first position receives the wireless signal and converts the wireless signal into a control signal, when the stylus 10 presses the input of the input board 30 In other positions in the area, the sensors 20 corresponding to other positions receive the wireless signals and convert the wireless signals into control signals. Wherein, the first position is the handwriting of a handwriting operation performed by the stylus 10 , such as a point, a straight line, a curved line, parallel lines in the same line and their continuous combination.

In this embodiment, the display device 40 is an LED, and the display device 40 can display seven colors according to the color voltage signal output by the color adjuster 13, which are respectively: the red color when the three color selection buttons of red, green and blue are respectively pressed. , green and blue, white when the three color selection buttons of red, green and blue are pressed at the same time, yellow when only the two color selection buttons of red and green are pressed at the same time, only the two color selection buttons of red and blue are pressed at the same time Magenta at the time, cyan only when the two color selection buttons of cyan and green are pressed at the same time.

Wherein, the second position corresponds to the display pixel at the corresponding position of the LED display area, and the LED is used to control the electrical change of the pixel at the corresponding position of the display area according to the control signal and the first position, such as the switch of the LED light so that The second position displays the handwriting of the handwriting operation. In other embodiments of this embodiment, the display device 40 may also be an LCD.

Please refer to FIG. 3 , in this embodiment, the microcontroller 12 includes two digital-to-analog converters and a sending module 122, and the digital-to-analog converters are used to convert the pressure data and color data into pen pressure voltages respectively. The digital signal and the color voltage digital signal are sent to the sending module 122, and the sending module 122 is used for converting the pen pressure digital signal and the color voltage digital signal into wireless signals.

Please refer to FIG. 4 , in another embodiment of the present invention, the microcontroller 12 further includes two comparators 123 and two memory units 124 . Wherein, before the digital-to-analog converter 121 respectively converts the pressure data and the color data into the pen pressure digital signal and the color voltage digital signal, the pressure data and the color data are respectively stored once in the two comparators 123, and the After the digital-to-analog converter 121 respectively converts the pressure data and the color data into pen pressure digital signals and color voltage digital signals, the memory unit 124 stores the pen pressure digital signals and color voltage digital signals respectively. After the controller 12 converts the pen pressure digital signal and the color voltage digital signal into wireless signals, if all the comparators 123 are interrupted, then the two comparators 123 will continue to store the pressure data and Color data, so that the two comparators 123 are respectively used to continuously store the pressure data and color data by generating interrupts, so as to continuously generate the pressure data and color data to complete the continuous collection of handwriting at the first position of the stylus 10 .

Please refer to FIG. 5 , the display device 40 in this embodiment includes a control device 41 and a display panel 42, the display panel 42 is provided with the display area, and the control device 41 is used to convert the control signal and the first position Converted into a display signal, the display panel 42 displays the handwritten information at the second position of the display area according to the display signal, wherein the control signal includes a pen pressure value and an input color value, and the display The signal includes the second position coordinates, handwriting thickness value and display color value. The pen pressure value comes from the pressure data obtained by the pressure sensor 11 when handwriting information, and the input color value comes from the color data output by the color adjuster 13. According to the pen pressure For the size value, the display signal is converted to the corresponding handwriting thickness value to display the handwriting thickness of the handwritten information. According to the input color value, the display signal is converted to the display color value to display the display color of the handwritten information.

In this embodiment, the control device 41 is specifically a CPU (Central Processing Unit, central processing unit), and may also be a DSP (Digital Signal Processing, digital signal processing chip) and a CPU. The display board 42 is an LED display screen. The input board 30 is transparent glass, and the input board 30 is covered on the LED display screen so that the display area and the input area overlap, and the first position and the second position overlap, wherein the Several sensors 20 are arranged right behind the display area of the display panel 42 , and the sending module 122 is arranged right behind the pressure sensor 11 . In other present embodiments of the present invention, the input board 30 is integrally formed on the surface of the display area of the display board 42, so that the stylus 10 can directly input information by handwriting on the display area of the display board 42, and complete the timely input of the handwritten information at the input position. It is shown that the handwritten information at this time is like writing on straw paper with a pencil or pen, thus improving user experience.

In this embodiment, after a predetermined number of the sensors 20 receive the wireless signal and convert the wireless signal into a control signal, the control device 41 is used to analyze the control signal and The control signal is converted into a display signal when the value of the middle pen pressure exceeds a predetermined value. At this time, the sensor 20 can be prevented from being interfered by other wireless signals, thereby preventing the display board 42 from displaying non-handwritten information and reducing the display quality of handwritten information.

Please refer to FIG. 6, in this embodiment, the display device 40 also includes a storage device 43, the storage device 43 is used to store the display signal, and the electronic drawing board also includes an electronic eraser 50, the electronic eraser 50 It is used to delete the display signal in the storage device 43 to clear the handwritten information displayed in the display panel 42 . The electronic eraser 50 erases the data in the storage device 43 by sending an erase signal, so that the user can modify the information when writing it by hand. There is a pressure sensing device and a wireless transmitter in the electronic eraser 50. When the electronic eraser 50 performs an erasing action on the display panel 42, the electronic eraser 50 senses the erasing pressure and sends an erasing signal to the storage setting, and the sensor 20 obtains the electronic eraser. 50 erasing the position, the storage device 43 deletes the corresponding display signal to remove the handwritten information displayed in the corresponding position of the display panel 42, wherein the electronic eraser 50 can send the erasing signal through wired methods such as data lines, and can also send the erasing signal in a wireless manner .

When the electronic drawing board is in the power supply state, the CPU will always read the data in the storage device 43, and control the LED light tube at the corresponding position of the LED screen to emit light. When the receiving module 21 receives new data, the CPU will repeat the process of processing and storing the data, and update the data in the storage device 43, and then the CPU will perform the process of reading, processing and controlling the display until the power is turned off.

When the electronic drawing board is restarted, you can choose to display the handwritten information input before the last shutdown, or you can choose to restart a new handwritten input. In this embodiment, the storage device 43 is a mobile hard disk. In other embodiments of the present invention, the storage device 43 may also be other storage devices 43, such as flash memory (Flash Eeeprom Memory).

In this embodiment, the sending module 122 is an infrared emitter, the sensor 20 is an infrared sensor 20, the wireless signal and the erasing signal are both infrared waves, and the microcontroller 12 generates and modulates infrared waves. Waveform, digital signal of pen pressure voltage and digital signal of color voltage are loaded on the infrared wave for emission, and the infrared sensor 20 can sense and receive the infrared wave in the environment, and match the received infrared wave. In order to realize infrared communication, it is necessary to define a complete set of infrared communication protocols to facilitate the encoding, transmission and decoding of signal data. In order to ensure the safety of infrared communication and prevent other types of infrared transmitters from interfering with the signal, the input infrared wave is loaded on a high-frequency carrier frequency. In order to realize the pairing of infrared communication, a fixed address code different from other infrared emitters is loaded in the infrared encoding and decoding waveforms, for example, the pen voltage digital signal and the color voltage digital signal loaded on the infrared wave in this embodiment The encoding rules of the data code are as follows:

protocol header|address code|pressure data code|RGB data code|

The RGB data codes are further divided into: red component data codes, blue component data codes, and green component data codes.

When the infrared wave received by the infrared sensor 20 contains an address code and matches the address code of the infrared wave sent by the stylus 10, the infrared sensor 20 converts the infrared wave at the sensing point into a control signal, thereby completing the display of handwritten information.

Due to the good directivity of the infrared emitter and the infrared electric wave, the electronic drawing board in this embodiment has a fine picture quality. In other embodiments of the present invention, the sending module and the sensor 20 may also be other devices capable of producing good directivity, such as a low-power laser emitter and the laser sensor 20 .

Please refer to FIG. 7 , which is a flowchart of a method for inputting and displaying handwritten information on an electronic drawing board in an embodiment of the present invention. The method includes steps:

S100: Setting an input area, a display area, and several sensors 20 on the electronic drawing board, the sensors 20 are two-dimensionally adjacently arranged and correspond to the input area;

S200: The stylus 10 of the electronic drawing board presses the first position of the input area to generate pressure data;

S300: The stylus 10 generates color data;

S400: The stylus 10 converts the pressure data and color data into wireless signals;

S500: The sensor 20 corresponding to the first position receives the wireless signal and converts the wireless signal into a control signal;

S600: The electronic drawing board controls the second position of the display area to display the handwritten information according to the control signal and the first position.

Specifically, a pressure sensor 11, a color adjuster 13 and a microcontroller 12 are set in the stylus 10, and the input area is arranged in the input board 30. When handwriting input information, the stylus 10 is pressed against the input area of the input board 30. And generate physical pressure, according to the piezoelectric effect, the pressure sensor 11 of the stylus 10 senses the physical pressure to generate pressure data, and transmit the pressure data to the microcontroller 12 .

After the pressure sensor 11 of the stylus 10 generates pressure data, the color adjuster 13 in the stylus 10 starts to generate color data, and the color data is a color voltage signal. In this embodiment, the pen body of the stylus 10 has red The three color selection buttons of green and blue are for the user to choose. When the three color selection buttons of red, green and blue are pressed separately, the color adjuster 13 outputs the corresponding red, green, and blue voltage signals to the microcontroller 12. When the three color selection buttons of blue are pressed multiple times or at the same time, according to the synthesis rule of the three primary colors of RGB, the color adjuster 13 outputs the corresponding color voltage signal to the microcontroller 12, for example, when the three color selection buttons of red, green and blue are pressed simultaneously , the color adjuster 13 outputs red, green and blue voltage signals to the microcontroller 12, when the red and green color selection buttons are pressed simultaneously and the blue selection button is not pressed, the color adjuster 13 outputs the red and green voltage signals to the microcontroller 12. Since the stylus 10 has the color adjuster 13 , the stylus 10 has the ability to match the three primary colors of RGB, which can be combined according to the requirements of the displayed colors, so that the user can choose a variety of colors.

Please refer to FIG. 2 at the same time. In this embodiment, the sensors 20 are two-dimensionally adjacently arranged in M rows and N columns, and correspond to the input area of the input board 30. When the stylus 10 presses the input area of the input board 30 , the pressing position is defined as the first position, at this time the sensor 20 corresponding to the first position receives the wireless signal and converts the wireless signal into a control signal, when the stylus 10 presses the input board 30 When other positions in the input area are input, the sensors 20 corresponding to other positions receive the wireless signals and convert the wireless signals into control signals. Wherein, the first position is the handwriting of a handwriting operation performed by the stylus 10 , such as a point, a straight line, a curved line, parallel lines in the same line and their continuous combination.

In this embodiment, by setting LEDs, the display screen of the LEDs forms the display area, and the LEDs can display seven colors according to the color voltage signal output by the color adjuster 13, which are respectively: red, green and blue three color options Red, green and blue when the buttons are pressed separately, white when the three color selection buttons of red, green and blue are pressed at the same time, yellow when only the two color selection buttons of red and green are pressed at the same time, only red and blue two Magenta when two color selection buttons are pressed at the same time, and cyan when only cyan and green color selection buttons are pressed at the same time.

Wherein, the second position corresponds to the display pixel at the corresponding position of the LED display area, and the LED is used to control the electrical change of the pixel at the corresponding position of the display area according to the control signal and the first position, such as the switch of the LED light so that The second position displays the handwriting of the handwriting operation. In other embodiments of this embodiment, the display area may also be a display screen of an LCD.

Please refer to FIG. 8 , in this embodiment, the stylus 10 converts the pressure data and color data into wireless signals specifically includes steps:

S420: respectively converting the pressure data and the color data into a pen pressure voltage digital signal and a color voltage digital signal;

S440: Convert the pen voltage digital signal and the color voltage digital signal into wireless signals.

Please refer to FIG. 9 , in another embodiment of the present invention, before step S420: converting the pressure data and color data into pen pressure voltage digital signals and color voltage digital signals, steps are further included:

S410: respectively store the pressure data and the color data once in the two comparators 123;

In step S420: after converting the pressure data and the color data into the pen pressure voltage digital signal and the color voltage digital signal respectively, further steps are included:

S430: storing the pen pressure digital signal and the color voltage digital signal; and after step S440: converting the pen pressure digital signal and the color voltage digital signal into wireless signals, further include:

S450: Determine whether all comparators 123 are interrupted. If all comparators 123 are interrupted, return to step S410 to continue storing the pressure data and color data in the two comparators 123, otherwise end.

Wherein, before the pressure data and the color data are respectively converted into the pen pressure digital signal and the color voltage digital signal by the digital-to-analog converter 121, the pressure data and the color data are respectively stored once in the two comparators 123. After the digital-to-analog converter 121 respectively converts the pressure data and the color data into pen pressure digital signals and color voltage digital signals, the memory unit 124 stores the pen pressure digital signals and color voltage digital signals respectively, and the micro-controller 12 After converting the pen pressure digital signal and the color voltage digital signal into wireless signals, if all the comparators 123 are interrupted, then continue to store the pressure data and color data in the two comparators 123 , so that the two comparators 123 are respectively used to continuously store the pressure data and the color data by generating interrupts, so as to continuously generate the pressure data and the color data to complete the continuous collection of handwriting at the first position of the stylus 10 .

Please refer to FIG. 10, step S600: the electronic drawing board controls the second position of the display area to display the handwritten information according to the control signal and the first position. Specifically includes:

S610: Convert the control signal and the first position into a display signal;

S630: Display the handwritten information at a second position in the display area according to the display signal, wherein the control signal includes pen pressure value and input color value, and the display signal includes second position coordinates, handwriting Thickness value and display color value, the pen pressure value comes from the pressure data obtained by the pressure sensor 11 according to the handwriting information, the input color value comes from the color data output by the color adjuster 13, and according to the pen pressure value, the display signal is converted into a corresponding The handwriting thickness value is thus displayed as the handwriting thickness of the handwritten information, and according to the input color value, the display signal is converted into a display color value to be displayed as the display color of the handwritten information.

In this embodiment, the display area overlaps with the input area, the first position overlaps with the second position, and the plurality of sensors 20 are disposed behind the display area. Wherein, the input board 30 is transparent glass, and the input board 30 is covered on the LED display screen so that the display area and the input area overlap, and the first position and the second position overlap, wherein, The plurality of sensors 20 are disposed directly behind the display area of the display panel 42 , and the sending module 122 is disposed directly behind the pressure sensor 11 . In other present embodiments of the present invention, the input board 30 is integrally formed on the surface of the display area of the display board 42, so that the stylus 10 can directly input information by handwriting on the display area of the display board 42, and complete the timely input of the handwritten information at the input position. It is shown that the handwritten information at this time is like writing on straw paper with a pencil or pen, thus improving user experience.

Please refer to FIG. 11 , in this embodiment, step S500: the sensor 20 corresponding to the first position receives the wireless signal and converts the wireless signal into a control signal, which specifically includes steps:

S510: Determine whether a predetermined number of the sensors 20 receive the wireless signal;

S520: If yes, convert the wireless signal into a control signal, otherwise end; and at the same time step S610: the conversion of the control signal and the first position into a display signal specifically includes steps:

S611: Determine whether the value of the pen pressure in the control signal exceeds a predetermined value;

S612: Convert the control signal into a display signal when the value of pen pressure in the control signal exceeds a predetermined value.

In this embodiment, after a predetermined number of the sensors 20 receive the wireless signal and convert the wireless signal into a control signal, the control device 41 is used to analyze the control signal and The control signal is converted into a display signal when the value of the middle pen pressure exceeds a predetermined value. At this time, the sensor 20 can be prevented from being interfered by other wireless signals, so that the display board 42 can display non-handwritten information and reduce the display quality of handwritten information.

Please refer to FIG. 12 , after step S610: converting the control signal and the first position into a display signal, further steps are included:

S620: store the display signal; and after step S630: displaying the handwritten information at the second position of the display area according to the display signal, further include the step of:

S640: Determine whether an erasing signal is received, and return to step S630 if the erasing signal is not received: continue to display the handwritten information at the second position of the display area according to the display signal; To erase the signal, enter step S650;

S650: Delete the display signal in the storage device 43 to clear the handwritten information displayed in the display area.

Wherein, by setting the storage device 43 for storing the display signal and the electronic eraser 50 deletes the display signal in the storage device 43 to remove the handwritten information displayed in the display panel 42, the electronic eraser 50 will send the erase signal to The data in the storage device 43 is erased, so that the user can modify the information when writing it by hand. There is a pressure sensing device and a wireless transmitter in the electronic eraser 50. When the electronic eraser 50 performs an erasing action on the display panel 42, the electronic eraser 50 senses the erasing pressure and sends an erasing signal to the storage setting, and the sensor 20 obtains the electronic eraser. 50 erasing the position, the storage device 43 deletes the corresponding display signal to remove the handwritten information displayed in the corresponding position of the display panel 42, wherein the electronic eraser 50 can send the erasing signal through wired methods such as data lines, and can also send the erasing signal in a wireless manner .

When the electronic drawing board is restarted, you can choose to display the handwritten information input before the last shutdown, or you can choose to restart a new handwritten input. In this embodiment, the storage device 43 is a mobile hard disk. In other embodiments of the present invention, the storage device 43 may also be other storage devices 43, such as flash memory (Flash Eeeprom Memory).

In this embodiment, the sending module 122 is an infrared emitter, the sensor 20 is an infrared sensor 20, the wireless signal and the erasing signal are both infrared waves, and the microcontroller 12 generates and modulates infrared waves. Waveform, digital signal of pen pressure voltage and digital signal of color voltage are loaded on the infrared wave for emission, and the infrared sensor 20 can sense and receive the infrared wave in the environment, and match the received infrared wave. In order to realize infrared communication, it is necessary to define a complete set of infrared communication protocols to facilitate the encoding, transmission and decoding of signal data. In order to ensure the safety of infrared communication and prevent other types of infrared transmitters from interfering with the signal, the input infrared wave is loaded on a high-frequency carrier frequency. In order to realize the pairing of infrared communication, a fixed address code different from other infrared emitters is loaded in the infrared encoding and decoding waveforms, for example, the pen voltage digital signal and the color voltage digital signal loaded on the infrared wave in this embodiment The encoding rules of the data code are as follows:

protocol header|address code|pressure data code|RGB data code|

The RGB data codes are further divided into: red component data codes, blue component data codes, and green component data codes.

When the infrared wave received by the infrared sensor 20 contains an address code and matches the address code of the infrared wave sent by the stylus 10, the infrared sensor 20 converts the infrared wave at the sensing point into a control signal, thereby completing the display of handwritten information.

Due to the good directivity of the infrared emitter and the infrared electric wave, the electronic drawing board in this embodiment has a fine picture quality. In other embodiments of the present invention, the sending module and the sensor 20 may also be other devices capable of producing good directivity, such as a low-power laser emitter and the laser sensor 20 .

In the electronic drawing board and electronic stylus 10 of the present invention, the pressure sensor 11 of the stylus 10 terminal system senses the pen pressure information when handwriting input information, and the RGB adjuster outputs the color information selected by the user, and sends it to the LED display through the microcontroller 12. system, and the LED display system processes the pen pressure information and color information to display the handwritten input information. It does not need to be connected to the computer through a data cable. The product is small in size and easy to carry. It also has a color selection function and can display multiple colors.

The electronic drawing board, the stylus 10 and the method for inputting and displaying handwritten information on the electronic drawing board in the embodiment of the present invention generate pressure data by pressing the pressure sensor 11 to input the handwritten information, the color adjuster 13 generates color data, and the microcontroller 12 Convert the pressure data and color data into wireless signals, the sensor 20 corresponding to the position receives the wireless signal and converts the wireless signal into a control signal, and the display device 40 is used to control the signal according to the control signal and the sensor 20 The handwritten information can be displayed at the position without connecting to the computer through a data cable. The product is small in size, easy to carry, and has a color selection function, which can display multiple colors.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not used as a limitation to the present invention. Alterations and variations are within the scope of the claimed invention.

Claims (22)

1. an electronic drawing board, for display and entering handwritten information, it is characterized in that, described electronic drawing board comprises:

Tablet, described tablet is provided with input area;

Writing pencil, described writing pencil comprises pressure inductor, mixing color device and micro controller, when described writing pencil presses the primary importance of the input area of described tablet, described pressure inductor for generation of pressure data to input described hand-written information, described mixing color device is for generation of color data, and described micro controller is used for described pressure data and described color data to be converted to wireless signal;

Several inductors, described inductor two dimension arranged adjacent the input area of corresponding described tablet, when described writing pencil presses the described primary importance of the input area of described tablet, inductor corresponding to described primary importance receives described wireless signal and described wireless signal is converted to control signal; And

Display device, described display device is provided with viewing area, and the second place that described display device is used for controlling according to described control signal and described primary importance described viewing area shows described hand-written information.

2. electronic drawing board as claimed in claim 1, it is characterized in that, described micro controller comprises two digital to analog converters and sending module, described digital to analog converter is used for respectively described pressure data and described color data being converted to pen pressure voltage digital signal and color voltage digital signal, and described sending module is used for described pen pressure voltage digital signal and described color voltage digital signal to be converted to wireless signal.

3. electronic drawing board as claimed in claim 2, it is characterized in that, described micro controller also comprises two comparers and two internal storage locations, described two comparers are respectively used to by pressure data described in generation interruption Coutinuous store and described color data thus produce described pressure data and described color data continuously, and described internal storage location is used for storing described pen respectively and presses voltage digital signal and described color voltage digital signal.

4. the electronic drawing board as described in claim 1 or 2 or 3, it is characterized in that, described display device comprises control device and display board, described display board is provided with described viewing area, described control device is used for described control signal and described primary importance to be converted to display, described display board shows described hand-written information according to described display with the described second place in described viewing area, wherein, described control signal comprises pen pressure sizes values and input color value, and described display comprises second place coordinate, handwriting thickness value and Show Color value.

5. electronic drawing board as claimed in claim 4, it is characterized in that, described tablet is clear glass, described tablet is covered on described display board, described viewing area and described input area overlap, described primary importance and described second place overlap, several inductors described are arranged at the dead astern, viewing area of described display board, and described sending module is arranged at described pressure inductor dead astern.

6. electronic drawing board as claimed in claim 5, it is characterized in that, the described inductor of predetermined number receives described wireless signal and after described wireless signal is converted to described control signal, described control device is for resolving described control signal and when the pressure of pen described in described control signal sizes values exceedes predetermined value, described control signal being converted to described display.

7. electronic drawing board as claimed in claim 6, it is characterized in that, described display device also comprises memory device, described memory device is for storing described display, described electronic drawing board also comprises electronics rubber, and described electronics rubber is used for deleting display in described memory device to remove the hand-written information shown in described display board by sending erase signal.

8. electronic drawing board as claimed in claim 7, it is characterized in that, described sending module is infrared transmitter, and described inductor is infrared inductor, and described wireless signal is infrared signal.

9. electronic drawing board as claimed in claim 8, it is characterized in that, described display board is LED or LCD, and the display screen of described LED or LCD forms described viewing area.

10. a writing pencil, for entering handwritten information on the tablet of electronic drawing board to show on the display device of electronic drawing board, it is characterized in that, described writing pencil comprises pressure inductor, mixing color device and micro controller, when described writing pencil presses described tablet, described pressure inductor for generation of pressure data to input described hand-written information, described mixing color device is for generation of color data, described micro controller is used for that described pressure data and described color data are converted to wireless signal and receives described wireless signal to make the inductor of electronic drawing board tablet pressing place, thus show described hand-written information according to the display device of described wireless signal control electronic drawing board.

11. writing pencils as claimed in claim 10, it is characterized in that, described micro controller comprises two digital to analog converters and sending module, described digital to analog converter is used for respectively described pressure data and described color data being converted to pen pressure voltage digital signal and color voltage digital signal, and described sending module is used for described pen pressure voltage digital signal and described color voltage digital signal to be converted to wireless signal.

12. writing pencils as claimed in claim 11, it is characterized in that, described micro controller also comprises two comparers and two internal storage locations, described comparer is used for interrupting described pen respectively and presses voltage digital signal and described color voltage digital signal to be sent to described sending module, and described internal storage location is for storing described pen pressure voltage digital signal and described color voltage digital signal.

13. writing pencils as claimed in claim 12, it is characterized in that, described sending module is infrared transmitter, and described sending module is arranged at described pressure inductor dead astern, and described wireless signal is infrared signal.

The method of 14. 1 kinds of electronic drawing board inputs and display hand-written information, described electronic drawing board is provided with writing pencil, it is characterized in that, described method comprises:

Described electronic drawing board arranges input area, viewing area and several inductors, described inductor two dimension arranged adjacent corresponding described input area;

The primary importance that described writing pencil presses described input area produces pressure data;

Described writing pencil produces color data;

Described pressure data and described color data are converted to wireless signal by described writing pencil;

Inductor corresponding to described primary importance receives described wireless signal and described wireless signal is converted to control signal; And

The second place that described electronic drawing board controls described viewing area according to described control signal and described primary importance shows described hand-written information.

The method of 15. electronic drawing board inputs as claimed in claim 14 and display hand-written information, it is characterized in that, described pressure data and color data are converted to wireless signal and specifically comprise by described writing pencil:

Respectively described pressure data and described color data are converted to pen pressure voltage digital signal and color voltage digital signal; And

Described pen pressure voltage digital signal and described color voltage digital signal are converted to wireless signal.

The method of 16. electronic drawing board inputs as claimed in claim 15 and display hand-written information, is characterized in that, described described pressure data and color data being converted to respectively before pen presses voltage digital signal and color voltage digital signal also comprises:

Described pressure data and described color data is stored once respectively in two comparers;

Described described pressure data and described color data being converted to respectively after pen presses voltage digital signal and color voltage digital signal also comprises:

Store described pen pressure voltage digital signal and described color voltage digital signal; And

Also comprise after described pen pressure voltage digital signal and described color voltage digital signal are converted to wireless signal:

Judge whether described comparer all interrupts, if described comparer all interrupts, then renew the described pressure data of storage and described color data at described two comparer relayings.

17. as described in claims 14 or 15 or 16 electronic drawing board input and display hand-written information method, it is characterized in that, described electronic drawing board shows described hand-written information according to the second place that described control signal and primary importance control described viewing area and specifically comprises:

Described control signal and described primary importance are converted to display; And

Described hand-written information is shown with the described second place in described viewing area according to described display, wherein, described control signal comprises pen pressure sizes values and input color value, and described display comprises second place coordinate, handwriting thickness value and Show Color value.

The method of 18. electronic drawing board inputs as claimed in claim 17 and display hand-written information, it is characterized in that, described viewing area and described input area overlap, described primary importance and described second place overlap, several inductors described are arranged at rear, described viewing area.

The method of 19. electronic drawing boards as claimed in claim 18 inputs and display hand-written information, is characterized in that, inductor corresponding to described primary importance receives described wireless signal and described wireless signal is converted to control signal and specifically comprise:

Judge whether that the described inductor of predetermined number receives described wireless signal;

That described wireless signal is converted to control signal; And

Describedly described control signal and described primary importance be converted to display specifically comprise:

Judge in described control signal, whether pen pressure sizes values exceedes predetermined value;

When the pressure of pen described in described control signal sizes values exceedes predetermined value, described control signal is converted to display.

The method of 20. electronic drawing boards as claimed in claim 19 inputs and display hand-written information, is characterized in that, described described control signal and described primary importance are converted to display after also comprise:

Store described display; And

Describedly also to comprise after showing described hand-written information in the described second place of described viewing area according to described display:

Judge whether that reception receives erase signal, if receive described erase signal, delete display in described memory device to remove the hand-written information shown in described viewing area.

The method of 21. electronic drawing board inputs as claimed in claim 20 and display hand-written information, it is characterized in that, described inductor is infrared inductor, and described wireless signal is infrared signal.

The method of 22. electronic drawing board inputs as claimed in claim 21 and display hand-written information, it is characterized in that, described viewing area is the display screen of LED or LCD.