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Touch position detection method, touch panel controller and electronic device

A touch panel and touch position technology, applied in the direction of instruments, electrical digital data processing, calculation, etc., can solve the problems of proportional expansion, increase of wiring resistance of sensing line S, complex composition of touch panel system, etc., and achieve simple composition Effect

Active Publication Date: 2021-05-28
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the case of an increase in the size of the touch panel, there is a problem that the wiring resistance of the sensing line S increases, and the number of channels of the reading circuit 5 (the number of sensing lines S) is different from the number of rows of the detection electrodes E. The multiplication result of the number and the number of columns is proportionally enlarged, and the composition of the touch panel system becomes complicated

Method used

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  • Touch position detection method, touch panel controller and electronic device
  • Touch position detection method, touch panel controller and electronic device
  • Touch position detection method, touch panel controller and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0031] (Configuration of touch panel system 1)

[0032] figure 1 It is a circuit diagram showing the configuration of the touch panel system 1 according to the first embodiment. The touch panel system 1 includes a touch panel 2 and a touch panel controller 3 that controls the touch panel 2 .

[0033] The touch panel 2 has K (K is plural) control lines DSS(0)-DSS(K-1) (control lines) intersecting each other and M (M is plural) drive sensing lines DS0-DS (M -1) (signal lines) correspond to the intersections of K control lines DSS(0)~DSS(K-1) and M drive sensing lines DS0~DS(M-1) and are arranged in a matrix ( K×M) detection electrodes E (electrodes). Each detection electrode E is arranged on the touch panel 2 .

[0034] A drive sensing switching element DST (switching element.) is formed between each detection electrode E and the corresponding driving sensing line. The driving sensing switching element DST is composed of a thin film transistor. The gate of each drive sensi...

Embodiment approach 2

[0091] based on Figure 6 ~ Figure 8 Another embodiment of the present invention will be described as follows. In addition, for convenience of description, members having the same functions as those described in the above-mentioned embodiment are assigned the same reference numerals, and description thereof will be omitted.

[0092] Figure 6 It is a circuit diagram showing the structure of the touch panel system 1a of Embodiment 2. The touch panel system 1a reads a single drive and sense line.

[0093] The touch panel system 1 a includes a touch panel 2 and a touch panel controller 3 a that controls the touch panel 2 . The touch panel controller 3a has M reading circuits 5a. Each of the M driving sense lines DS0 to DS(M−1) is connected to an input of one of the amplifiers 7a of the corresponding reading circuit 5a. The other input of amplifier 7a is AC grounded. An integrating capacitor Cint is connected between one input and the output of the amplifier 7a. In addition...

Embodiment approach 3

[0106] (Configuration of touch panel system 1b)

[0107] Figure 9 It is a circuit diagram showing the structure of the touch panel system 1b of Embodiment 3. In addition, the same code|symbol is attached|subjected to the member which has the same function as the member demonstrated in the said embodiment, and the description is abbreviate|omitted. The touch panel system 1b includes a touch panel 2b and a touch panel controller 3b that controls the touch panel 2b.

[0108] The touch panel 2 b includes (K×M) detection electrodes E (electrodes) arranged in a matrix. Here, the X-axis direction is the first direction of the matrix. Here, the Y-axis direction is the second direction of the matrix crossing the first direction.

[0109] The touch panel controller 3b has: a drive circuit 4 connected to M drive sensing lines DS0-DS(M-1) through a switch SW, and a drive circuit 4 connected to K control lines DSS(0)-DSS(K-1) A switching element control circuit 8, a plurality of read...

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Abstract

Capacitance distribution on the touch panel can be detected with a simple configuration. Driving the sensing lines (DS0˜DS(M‑1)) with a first potential based on the coding sequence. Thereafter, each drive sensor switch element (DST22 and DST22') corresponding to the gesture area (22) is turned off, and a linear sum signal based on the charge of each detection electrode (E) is read.

Description

technical field [0001] The present invention relates to a touch position detection method using a touch panel that detects capacitance or capacitance changes between a plurality of electrodes and a detection object, a touch panel controller, and electronic equipment. Background technique [0002] Patent Document 1 discloses a capacitance detection method using a touch panel that detects capacitance or capacitance changes between a plurality of electrodes and a detection object. [0003] Figure 12 It is a circuit diagram showing the configuration of a conventional touch panel system. The touch panel 92 includes 12 detection electrodes E arranged in a matrix at intervals in 4 rows and 3 columns. The sensing line S connected to each detection electrode E is connected to the reading circuit 5 . [0004] In the capacitance detection method using the touch panel 92 configured in this way, a signal corresponding to the capacitance between each detection electrode E and the detec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/041G06F3/044
CPCG06F3/0446G06F3/04166G02F1/13338G02F2201/121
Inventor 滨口睦宫本雅之新庄信次
Owner SHARP KK