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Realization method of anti-interference technology based on touch-screen

An implementation method and touch screen technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of sound wave technology that cannot be used normally, errors, and anti-interference are not ideal

Inactive Publication Date: 2012-09-26
ZHONGSHAN BAILENG PHOTOELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technologies all have a common feature, they need sensors, and convert the signal into data, and analyze and process the data. They have a common shortcoming: the anti-interference is not ideal, for example: the sound wave technology cannot be used normally when it encounters water, and it is harmful to the tube and Optical products contain infrared light in sunlight or lights, and the difference in these ambient lights will affect the correct judgment of the system, resulting in errors or inability to use

Method used

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  • Realization method of anti-interference technology based on touch-screen
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  • Realization method of anti-interference technology based on touch-screen

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Embodiment

[0030] like figure 1 , 2 As shown, the collected data is placed in a 2-dimensional plane coordinate system, where the X-axis is the ADC value and the Y-axis is the ADC data serial number. Multiple ADC values ​​can connect these data into an irregular curve, and by connecting these points The value of is stored in A(n) as the original parameter. When a touch screen event occurs, the ambient light intensity changes, water or other pollutants fall on the product, and an interference signal is generated. At this time, the real-time data is stored as B(n), and the parameters of B(n) are also calculated. storage, another curve can be obtained. like image 3 As shown, will figure 1 and figure 2 Comparing the two sets of data in A(n) and B(n), you can see the difference in the curves generated by the two sets of data. In addition, there are inevitably various interference sources in the electronic circuit itself, such as: power fluctuations, electromagnetics, temperature change...

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Abstract

The invention discloses a realization method of anti-interference technology based on touch-screen. The method comprises following steps: A (n) data acquired from an ADC system is established into a two dimensional coordinate system, wherein X axis represents the value of ADC, Y axis represents the data sequence number of ADC, and A (n) is saved in an RAM; when screening touching operation occurs, a variable B (n) acquired from the ADC system is saved in the two dimensional coordinate system, a touch-screen variable [delta] C is calculated through the formula: [delta] C = A (n) - B (n), time events are called, and a time constant is set to be t; when time events are triggered, a variable B (n+1) is acquired by the ADC system again, and when B (n+1) = B (n), B (n) is assigned to the A (n), otherwise, time events are over; and an environment interference constant is set to be v, and a touch-screen variable T is calculated through the formula: T = [delta] C - v, wherein when T > 0, the screening touching operation is effective.

Description

technical field [0001] The invention relates to touch screen technology, in particular to a method for realizing anti-interference technology based on touch screen. Background technique [0002] After experiencing earth-shaking baptisms again and again, electronic products have shown miracles time and time again and won people's pursuit. The application of touch screen technology has won the trust of the majority of users. However, in the current touch screen technology, the current touch screen technology mainly includes the following aspects. 1. Acoustic touch screen technology relies on surface acoustic wave transmission, and obtains coordinates by identifying attenuation signals ; Its 2. Infrared tube technology, which consists of an infrared emitting LED and a receiving LED to form a whole column, judges the position of the blocked LED in the array, and obtains the coordinates; its 3. Optical touch screen, relying on an infrared camera lens to capture image signals and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
Inventor 谭朝晖张伟灿
Owner ZHONGSHAN BAILENG PHOTOELECTRIC
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