IC754VSI12VTD | GE | Serial Resistance touch screen technology controller

Description

IC754VSI12VTD | GE | Serial Resistance touch screen technology controller

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According to the different IC754VSI12VTD of screen surface positioning, touch screen technology can be divided into two categories: acoustic pulse recognition (APR) technology, surface acoustic wave (SAW) technology, capacitive touch screen technology, and resistive touch screen technology, infrared/optical technology.

Acoustic Pulse Recognition (APR) technology APR is composed of a glass display coating or other hard substrate, with four piezoelectric sensors installed on the back. The sensor is installed on two diagonals in the visible area and connected to the control card through a bent cable. When a user touches the screen, the drag between their fingers or stylus and the glass collides or rubs, resulting in the generation of sound waves. Wave radiation leaves the contact point and transmits to the sensor, generating electrical signals in proportion to sound waves. Amplify these signals in the control card and convert them into digital data streams. Compare the data with a pre stored sound list to determine the position of the touch. APR is designed to eliminate environmental influences and external IC754VSI12VTD , as these factors do not match the stored sound list.

Surface Acoustic Wave (SAW) technology: The SAW touch screen is made up of a glass coating with transmitting and receiving piezoelectric sensors for the X and Y axes. The controller sends an electrical signal to the transmitting sensor and converts the signal into ultrasonic waves on the surface of the glass. Through a reflector array, these waves cover the entire touch screen. The reflector on the opposite side collects and controls these waves to the receiving sensor, converting them into electrical signals. Repeat this process for each axis. The user absorbs a portion of the IC754VSI12VTD wave when touching. Compare the received signals corresponding to the X and Y coordinates with the stored digital distribution map to identify changes and calculate coordinates.

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