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Reference updating method and system for touch screen as well as touch terminal

A benchmark update, touch screen technology, applied in the input/output process of data processing, instruments, electrical digital data processing and other directions, can solve the problems of poor sensitivity of touch screen, false alarm points, etc.

Active Publication Date: 2013-03-13
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the obtained benchmark is wrong when the benchmark is updated, it may lead to poor sensitivity of the touch screen or false positives.

Method used

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  • Reference updating method and system for touch screen as well as touch terminal
  • Reference updating method and system for touch screen as well as touch terminal
  • Reference updating method and system for touch screen as well as touch terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this embodiment, the feature value is a difference value between original values ​​sampled at adjacent sampling points of the touch screen. see figure 2 As shown in FIG. 1 , it is a flow chart of the reference updating method of the touch screen according to Embodiment 1 of the present invention. The method comprises the steps of:

[0034] Step S101: Sampling in a steady state, calculating and backing up the difference values ​​of adjacent sampling points in a steady state.

[0035] In this step, each sampling point is sampled when the touch screen is in a stable state to obtain the original value sampled in the steady state, and then calculated according to the original value sampled in the steady state to obtain the difference between the original values ​​sampled at adjacent sampling points of the touch screen, and the backup value The difference value is used as a reference quantity for updating the benchmark, so that the touch control chip can quickly and acc...

Embodiment 2

[0082] In this embodiment, the feature value is a ratio value between original values ​​sampled at adjacent sampling points of the touch screen. see Figure 4 As shown in FIG. 2 , it is a flow chart of the reference updating method of the touch screen according to Embodiment 2 of the present invention. The method comprises the steps of:

[0083] Step S201: Sampling in a steady state, calculating and backing up the ratio values ​​of adjacent sampling points in a steady state.

[0084] In this step, when the touch screen is in a steady state, each sampling point is sampled to obtain the original value of the steady state sampling, and then the ratio between the original values ​​of the adjacent sampling points of the touch screen is calculated according to the original value of the steady state sampling, and the backup value is backed up. The proportional value is used as a reference quantity for benchmark update, so that the touch control chip can quickly and accurately obtai...

Embodiment 3

[0132] In this embodiment, the feature value is an original value sampled at each sampling point of the touch screen. see Figure 6 As shown in FIG. 1 , it is a flow chart of the reference update method for the touch screen according to Embodiment 3 of the present invention. The method comprises the steps of:

[0133] Step S301: Sampling in a steady state, obtaining and backing up the original values ​​sampled at each sampling point in a steady state.

[0134] In this step, when the touch screen is in a stable state, each sampling point is sampled to obtain the original value sampled at each sampling point in a stable state, and the original value is backed up as a reference for benchmark update, so that the touch control chip can be quickly and accurately detected during actual detection. to obtain the correct baseline value. In this embodiment, the original value is backed up and stored in the Flash Memory of the touch control chip. In this embodiment, no complicated cal...

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Abstract

The invention relates to the technical field of touch and provides a reference updating method for a touch screen. The reference updating method comprises the following steps: backing up a characteristic value in a stable state; taking an original value for electric sampling on the touch screen as a reference value so as to establish the reference and calculating an electrified characteristic value; subtracting the electrified characteristic value by the backup characteristic value and taking an absolute value and finding out a maximum value in the absolute value; judging whether the maximum value is greater than the set first threshold or not, if the maximum value is greater than the set first threshold, judging that the current reference is incorrect or not; if the current reference is incorrect, judging whether touch exists on the touch screen or not; if no touch exists on the touch screen, updating the reference at fixed time; if the touch exists on the touch screen, monitoring whether the current characteristic value obtained by calculating according to the currently-sampled original value with the backup characteristic value or not in real time; and if the current characteristic value is consistent with the backup characteristic valve, updating the reference. According to the reference updating method disclosed by the invention, when the touch control chip is actually detected, a correct reference value can be acquired quickly and accurately, and thus the reference is correctly updated.

Description

technical field [0001] The present invention relates to the field of touch technology, in particular to a reference update method and system for a touch screen and a touch terminal. Background technique [0002] With the development of touch technology and terminal technology, more and more terminal devices use touch mode for human-computer interaction. At present, the touch screens used in terminal equipment mainly include capacitive touch screens and resistive touch screens. Capacitive touch screens are favored by more and more users because of their good clarity, light transmittance and tactility. [0003] In the touch detection process of the capacitive touch screen, the touch control chip first obtains the original data through ADC (Analog-to-Digital Converter, analog-to-digital converter) sampling to obtain the original value; then establishes a benchmark based on the original value to obtain the benchmark value; In the calculation of , the difference is obtained by s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/048G06F3/0416G06F3/0418
Inventor 陈小祥吴飞邓耿淳
Owner SHENZHEN GOODIX TECH CO LTD
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