Digit and analog combined grid type touch screen
A digital-analog combination and grid-based technology, applied in the input/output process of data processing, electrical digital data processing, instruments, etc., can solve the problems of asymmetry, difficulty, and long detection time of electrode leads
Inactive Publication Date: 2013-12-04
新励科技(深圳)有限公司
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Problems solved by technology
To solve the asymmetry of the electrode leads of the grid-shaped touch screen, which brings difficulties to the analog detection of the touch position; it also solves the grid-like touch screen with digital detection of the touch position in both directions of the rows and columns. The problem of complex connection of the lead-out end and long detection time
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[0034] One of the embodiments of the present invention is as Figure 4 Shown: a digital-analog touch TFT-LCD 400 in which the touch detection electrode lines intersect with the lead-out terminals of the column signal electrodes. The TFT-LCD 400 consists of a liquid crystal display 410, a display drive scanning circuit 420, a display drive signal circuit 430, an analog switch group 440, a touch detection electrode line 450, a row touch detection circuit 460, a column touch detection circuit 470, and a control circuit. 480 composition. There are n row scanning electrode lines 411 and m column signal electrode lines 412 on the TFT array substrate glass of the liquid crystal display 410, and the row scanning electrode lines 411 and column signal electrode lines 412 are connected to display pixel electrodes through TFTs in the display screen. The leading end of the row scanning electrode line 411 is connected to the display drive scanning circuit 420 and the row touch detection ci...
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The invention relates to a grid-style touch screen, in particular to a grid-style touch screen which is combined with digifax. When two directions of the row and the column detect touch positions in digit style, an electric pole leading-out terminal is connected complexly and the detecting time is long. When the two directions of the row and the column detect touch positions in simulating style, the unsymmetry performance of the electric pole leading-out terminal of the grid-style touch screen brings difficulty in detecting touch positions in simulating style. The two directions of the row and the column of the grid-style touch screen of the invention touch and locate in different styles, namely, the two directions of the row and the column of the grid-style touch screen touch and locate through comparing differences of touch control signals on each electric poles in scanned-number style, and touch and locate through comparing sizes of the touch control signals, and a touch control detecting electric pole which reuses a display screen row and column electric pole as a grid-style touch screen which is combined with digifax is provided.
Description
technical field [0001] The invention relates to a grid-type touch screen, in particular to a grid-type touch screen combining digital and analog. Background technique [0002] Current capacitive touch screens can be divided into two types: digital and analog. The digital capacitive touch screen 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 human finger touches the touch screen, the finger forms a coupling with some electrodes on the touch screen. Capacitance, and the leakage current flowing from the coupling capacitor, the touch position is determined by detecting two electrodes on the two layers of electrodes that are orthogonal to each other and form a coupling capacitor with the finger. This method is only suitable for coarser positioning. When fine positioning is required, it is necessary to make double-layer fine electrodes, which is too expensive; and placed in...
Claims
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IPC IPC(8): G06F3/044
Inventor 陈其良
Owner 新励科技(深圳)有限公司