Capacitive screen short circuit testing method, capacitive screen and mobile terminal

A short-circuit test and capacitive screen technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of abnormal signal, wrong processing, short circuit, etc., and achieve the effect of improving accuracy, saving production cost, and the method is simple and reliable.

Inactive Publication Date: 2019-03-29
SHENZHEN DEMINGLI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under normal circumstances, the electrodes should be independent of each other without interfering with each other. However, errors or abnormal processing m

Method used

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  • Capacitive screen short circuit testing method, capacitive screen and mobile terminal
  • Capacitive screen short circuit testing method, capacitive screen and mobile terminal
  • Capacitive screen short circuit testing method, capacitive screen and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Embodiment one

[0039] refer to figure 1 , the present embodiment provides a capacitive screen short-circuit test method, including:

[0040] Step S101, selecting the first touch electrode to be detected and the second touch electrode to be detected;

[0041] Step S102, setting the first input and output interface connected to the first touch electrode to be detected in the touch IC as an output mode;

[0042] Step S103, setting the second input and output interface connected to the second touch electrode to be detected in the touch IC as an input mode;

[0043] Step S104, setting the other input and output interfaces in the touch IC as high-impedance mode or low-level output mode;

[0044] Step S105, outputting a level signal through the first input and output interface, and detecting whether the second input and output interface receives a feedback signal;

[0045] Step S106, if a feedback signal is received, compare the feedback signal with the level signal, and...

Example Embodiment

[0055] Embodiment two

[0056] This embodiment provides a capacitive screen short circuit test method, including:

[0057] Step S201, selecting the first touch electrode to be detected and the second touch electrode to be detected;

[0058] Step S202, setting the first input and output interface connected to the first touch electrode to be detected in the touch IC as an output mode;

[0059] Step S203, setting the second input and output interface connected to the second touch electrode to be detected in the touch IC as an input mode;

[0060] Step S204, setting the other input and output interfaces in the touch IC to high-impedance mode or low-level output mode;

[0061]Step S205, output the level signal through the first input and output interface for M times, and detect whether the second input and output interface receives the feedback signal;

[0062] Step S206, if a feedback signal is received, wherein the feedback signal is consistent with the level signal for N time...

Example Embodiment

[0067] Embodiment three

[0068] This embodiment provides a short-circuit test method for a capacitive screen, which uses the method in Embodiment 1 or Embodiment 2 to perform a short-circuit test on the touch electrodes of the entire capacitive screen.

[0069] The capacitive screen includes a plurality of touch electrodes. In each round of testing, different touch electrodes are selected as the first touch electrode to be detected and the second touch electrode to be detected, and multiple rounds of cyclic tests are performed to find out the touch electrodes in the capacitive screen. Shorted touch electrodes.

[0070] Assuming that there are 7 touch electrodes in the capacitive screen, the numbers are 1, 2, 3, 4, 5, 6, and 7, and the cycle is as follows:

[0071] In the first round, the touch electrode numbered 1 is used as the first touch electrode to be detected, and the touch electrodes numbered 2, 3, 4, 5, 6, and 7 are respectively used as the second touch electrode to ...

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Abstract

The invention provides a capacitive screen short circuit testing method, a capacitive screen and a mobile terminal. The method comprises the following steps: selecting a first to-be-detected touch electrode and a second to-be-detected touch electrode; setting a first input/output interface connected with the first to-be-detected touch control electrode in a touch control IC to be the output mode;setting a second input/output interface connected with the second to-be-detected touch control electrode in the touch control IC to be the input mode; setting the rest input/output interfaces in the touch control IC to be the high-resistance-state mode or the low-level output mode; outputting a level signal through the first input/output interface, and detecting whether a feedback signal is received by the second input/output interface or not; if the feedback signal is received, comparing the feedback signal with the level signal; if the feedback signal is consistent with the level signal, determining that a short circuit occurs between the first to-be-detected touch electrode and the second to-be-detected touch electrode. The method is simple and reliable. Through simple signal processing, the detection of the short circuit condition of the touch control electrode in the capacitive screen can be realized.

Description

technical field [0001] The invention relates to the technical field of capacitive screen testing, in particular to a capacitive screen short-circuit testing method, a capacitive screen and a mobile terminal. Background technique [0002] The touch electrodes of the capacitive touch screen include driving electrodes and sensing electrodes. The driving electrodes and sensing electrodes are connected to the touch IC through wires. The touch IC scans the touch electrode layer, sends driving signals and receives sensing signals. [0003] Under normal circumstances, the electrodes should be independent of each other without interfering with each other. However, errors or abnormal processing may occur during the production process, resulting in a certain impedance connection between the electrodes and a short circuit, which will lead to abnormal signals. Contents of the invention [0004] The purpose of the present invention is to solve the signal abnormality problem caused by th...

Claims

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Application Information

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IPC IPC(8): G01R31/02G06F3/044
CPCG01R31/50G06F3/044
Inventor 田华李鹏
Owner SHENZHEN DEMINGLI ELECTRONICS
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