Touch control panel display

Abstract

This invention discloses one touch control plane display device, which connect display screen electrode and touch control signal circuit through analogue switch, wherein, the analogue switch set makes the display screen electrode and display drive circuit switching between display drive circuit and touch control signal circuit to connect them to multiplex display screen electrode by time division method and to integrate touch control screen and display screen from time dimension with touch control function.

Description

technical field [0001] The invention relates to a touch screen and a flat panel display, in particular to a touch type flat panel display. Background technique [0002] At present, flat-panel displays with touch functions are composed of display screens, display drivers, touch screens, touch signal detectors, backlights and other components. Touch screens include resistive, capacitive, electromagnetic, Ultrasonic type and photoelectric type, etc., the display screens include TN / STN liquid crystal display, TFT liquid crystal display, OLED display, PDP display, carbon nanotube display, etc. A flat panel display with a touch screen laminates a separate touch screen and a display screen, detects the plane position of a touch point through the display screen, and then makes the cursor on the display screen follow the touch point. The layering of the touch screen and the display screen makes the touch panel display thicker and heavier and increases the cost; when the touch screen...

AI Technical Summary

Problems solved by technology

This method can be finely positioned, but the calculation of the control circuit is large. When the ambient temperature and humidity change, the environmental electric field will cause drift, resulting in inaccurate positioning; the analog capacitive touch screen with double-layer sensing electrodes It is composed of two layers of electrodes with multiple parallel electrodes on each layer. The two layers of electrodes are orthogonal to each other. When a person's finger touches the touch screen, the finger and some electrodes on the touch screen form a coupling capacitance, and from the coupling capacitance The outflow leakage current, by detecting the magnitude of the outflow current of each electrode, calculates the horizontal or vertical touch position on the two layers of mutually orthogonal electrodes

This method can fine-tune positioning and improve the drift problem, but it needs to detect the leakage current of the double-layer sensing electrodes one by one, the amount of detection and calculation is large, and the time required for detection and calculation also increases as the screen becomes larger and the number of sensing electrodes increases

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