Touch control panel display
A flat-panel display, touch technology, applied in the direction of instrument, electrical digital data processing, input/output process of data processing, etc., can solve the problems of drift, detection and calculation, and control circuit calculation.
Inactive Publication Date: 2010-05-12
新励科技(深圳)有限公司
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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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[0035] One of the embodiments of the present invention is as image 3 As shown: a touch-sensitive liquid crystal display 300 connected from the display terminal to detect the touch leakage current of the display screen electrodes. 350, touch circuit 360 and 370, and control system 380. The N rows of ITO electrodes 311 of the liquid crystal display 310 are connected to the fixed end of the N-bit single-pole double-throw analog switch group 320, and the display drive circuit 340 and the touch control circuit 360 are respectively connected to To the two switching ends of the analog switch group 320, the M column ITO electrodes 312 are connected to the fixed ends of the M-position single-pole double-throw analog switch group 330, and the display drive circuit 350 and the touch circuit 370 are respectively connected to two of the analog switch group 330. Switching end. In the display frame, the control system 380 allows the analog switch group 320 to scan the N rows of ITO electrod...
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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 makesthe 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 divisionmethod 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 touch 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 i...
Claims
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IPC IPC(8): G06F3/044
Inventor 陈其良陈梅英刘海平
Owner 新励科技(深圳)有限公司