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Method for identifying pressure sensitive electronic whiteboard by touch

An electronic whiteboard and pressure-sensitive technology, which is applied in the direction of electric digital data processing, input/output process of data processing, instruments, etc., can solve the problems that the automatic recognition of writing pen, finger and fist can not be realized, etc.

Inactive Publication Date: 2011-05-18
RETURNSTAR INTERACTIVE TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] However, when the current pressure-sensitive electronic whiteboard is written with a stylus or tapped with a finger, the board is limited to the processing method of detecting the coordinate value of the pressure point, and cannot realize the three operation modes of writing pen, finger, and palm on the board body. auto-recognition on

Method used

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  • Method for identifying pressure sensitive electronic whiteboard by touch
  • Method for identifying pressure sensitive electronic whiteboard by touch
  • Method for identifying pressure sensitive electronic whiteboard by touch

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Embodiment Construction

[0027] The touch screen controller of the present invention can be a four-wire touch screen controller model ADS7846 or TSC2046, where TSC2046 is an updated version of ADS7846, supporting low voltage I / O interfaces from 1.5V to 5.25V, its internal structure and pin packaging Fully compatible with previous generation products, such as figure 2 As shown, when in use, one end of the touch screen controller 1 is connected to the board 2 of the pressure-sensitive electronic whiteboard, and the other end is connected to the CPU3 through a serial peripheral interface (SPI, Serial Peripheral Interface), where the touch screen controller 1 and CPU3 are both set in On the control circuit board (not shown) of the pressure sensitive electronic whiteboard. The following uses TSC2046 as an example to illustrate the structure of the touch screen controller.

[0028] Such as image 3 As shown, it is a schematic diagram of the structure of the TSC2046 touch screen controller 1 involved in the me...

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Abstract

The invention provides a method for identifying a pressure sensitive electronic whiteboard by touch, comprising the following steps of: presetting strength reference intervals of three states including mouse operation, writing pen operation and erasing operation; when the body of the pressure sensitive electronic whiteboard is pressed, detecting the contacted point of X-position on an X work surface; detecting internal parameters Z1 and Z2 of a touch screen for reflecting the relationship between the contacted point and the X work surface and a Y work surface; expressing a value of a contact resistor RTOUCH by a computing formula; and by post-processing treatment, converting the value of the contact resistor RTOUCH into a pressure value of the pressed pressure sensitive electronic whiteboard, and comparing the pressure value with the strength reference interval and judging so as to distinguish the type of the press on the pressure sensitive electronic whiteboard, which belongs to the three states including mouse operation, writing pen operation and erasing operation corresponding to three operation modes of the writing pen, the finger and the fist palm. Therefore, the method has the advantage that the automatic identification of three operation modes of the writing pen, the finger and the fist palm is supported on the pressure sensitive electronic whiteboard, thereby achieving the direct interactive operation between a user and the whiteboard.

Description

【Technical Field】 [0001] The invention relates to an electronic whiteboard, in particular to a method for realizing touch recognition by a pressure-sensitive electronic whiteboard. 【Background technique】 [0002] The electronic whiteboard is a high-tech product developed by a variety of high-tech methods such as cutting-edge electronic technology and software technology. It can realize paperless office through the application of different principles such as electromagnetic induction, pressure induction, and photoelectric induction, combined with computers and projectors. And teaching. The electronic whiteboard is divided into two types according to the working principle: pressure-sensitive principle and laser tracking principle. The touch whiteboard using the principle of pressure sensing is equivalent to a touch screen of a computer. It is a human-computer interactive input device that uses a finger or a pen to touch the options displayed on the screen to complete the specified...

Claims

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Application Information

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IPC IPC(8): G06F3/045
Inventor 丁万年黄威陈日良洪文杰
Owner RETURNSTAR INTERACTIVE TECH GRP
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