Touch sensing circuit and touch display panel
A technology of touch sensing and circuit, which is applied in the field of touch display panel and touch sensing circuit, which can solve the problems of lower FPC Bonding yield rate, low FPC Bonding yield rate, and increase of FPC manufacturing cost, so as to reduce the number of pins and simplify the production , the effect of cost reduction
Active Publication Date: 2018-01-16
KUSN INFOVISION OPTOELECTRONICS
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Problems solved by technology
[0004] However, the larger the number of pins provided on the FPC, the larger the FPC is often required, and the larger the width of the bonding area between the FPC and the TP, the higher the manufacturing cost of the FPC and the lower the cost of the FPC. FPCBonding Yield
[0005] Therefore, it is necessary to provide a touch panel function, which can solve the problems of high FPC manufacturing cost and low FPC Bonding yield in the above-mentioned prior art problems
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[0015] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0016] image 3 It is a schematic diagram of a circuit structure of a touch sensing circuit according to an embodiment of the present invention. Such as image 3 As shown, the touch sensing circuit of the present invention includes a driving signal input terminal TX, a plurality of sensing signal output terminals RX1-RX5 (five are used as an example in the figure), and multiple sets of touch sensing sub-circuits (five groups are used in the figure) example). Wherein, each group of touch sensing sub-circuits includes a driving switch element M1, five sensing switch elements M2 to M6, and five touch capacitors C1 to C5.
[0017] Wherein, in each group of touch sensing sub-circuits, the driving switch element M1 and the five sensing sw...
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The present invention provides a touch sensing circuit, which includes a drive signal input terminal, n sensing signal output terminals, and n groups of touch sensing sub-circuits, wherein n is a natural number greater than or equal to 1. Each group of touch sensing sub-circuits includes a driving switch element, n sensing switch elements and n touch capacitors. The control end of each switch element receives a clock signal, the input end of the drive switch element is connected to the drive signal input end, and the output end is connected to the input end of n sensing switch elements through n touch capacitors. The output ends of the n sensing switch elements are connected one-to-one to the n sensing signal output ends. Wherein, the clock signals received by the control ends of the driving switching elements of the n groups of touch sensing sub-circuits are different. The touch sensing circuit of the present invention controls the input and output of each switching element through different clock signals, reduces the number of pins of the FPC, makes the volume of the FPC smaller, reduces the cost, and improves the yield rate of the panel.
Description
technical field [0001] The present invention relates to the field of touch technology, in particular to a touch sensing circuit and a touch display panel using the touch sensing circuit. Background technique [0002] With the improvement of panel functions of display devices and the development of touch technology, a touch display panel (TouchPanel, TP) emerges as the times require and becomes more and more mature. The touch display panel is to increase the touch sensing transmission line (TX line) and the touch sensing receiving line (RX line) on the display panel, and then use the touch flexible circuit board (FPC) to transmit the driving signal provided by the touch chip. to the TX line, and then feeds back the signal to the FPC through the RX line electrically connected to the TX line, and provides the signal to the touch chip through the FPC for processing to realize the touch function. [0003] figure 1 It is a schematic diagram of the circuit structure of the touch ...
Claims
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IPC IPC(8): G06F3/041
Inventor 陈涛万黎明赵敬鹏
Owner KUSN INFOVISION OPTOELECTRONICS