Anti-light interference method and circuit
A light interference and circuit technology, applied in the direction of electrical digital data processing, instruments, data processing input/output process, etc., can solve the problems of poor anti-light effect, high overall speed and high cost, etc., to achieve Effects with better filtering effect, short processing time, and low hardware cost
Active Publication Date: 2016-12-28
GUANGZHOU SHIRUI ELECTRONICS
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
It takes a certain time for each photoelectric conversion of the lamp tube. If the carrier modulation frequency is not high enough, the anti-light effect will not be good.
Therefore, the disadvantage of method three is that it is necessary to build a high-speed amplifier circuit, and it is generally a relatively expensive operational amplifier.
In addition, in order to achieve better results, the overall speed cannot be made higher
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.
[0025] Anti-light interference method of the present invention, such as figure 1 shown, including steps:
[0026] Step S101, at the infrared receiving end of the touch frame, several infrared receiving tubes are selected at intervals as effective light filtering receiving tubes, and the remaining infrared receiving tubes are used as complete light receiving tubes;
[0027] Step S102, filtering the signal received by the effective light filtering receiving tube to filter out the effective light;
[0028] Step S103, subtracting the filtered signal received by the eff...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an anti-light interference method and circuit. A part of infrared receiving tubes is selected to filter the received signals to filter out effective light to obtain interfering light, and then subtract the filtered signal from signals received by other infrared receiving tubes. signal to get the original signal. Compared with the traditional method of filtering out the interference light with unstable signal frequency, this method and the circuit filter out the effective optical signal with fixed frequency, and the filtering effect is better. After subtraction processing, the obtained original signal is closer to the real original signal. According to The original signal is used for positioning, and the result is more accurate. At the same time, because the process of filtering and subtraction is simple, the processing time of the method and the circuit is short, and the hardware cost is low.
Description
technical field [0001] The invention relates to the technical field of infrared touch positioning, in particular to an anti-light interference method and circuit. Background technique [0002] The infrared touch screen is a touch screen in which an infrared emitting tube and an infrared receiving tube are respectively installed on two sets of opposite sides of the screen frame, and the coordinate position of the touch point is obtained by switching the optical path of the infrared pairing tubes on the two sets of opposite sides. Infrared touch screen is a product that needs to accurately distinguish effective light signals. Therefore, in the process of photoelectric signal processing, it must filter out the electrical signals generated by the interfering light from the outside. [0003] At present, there are many methods of anti-light filtering. In addition to the processing of software algorithms and structures, there are mainly the following methods in terms of circuits: ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 徐文杰刘辉武何学志薛琛谢旺张浩鑫
Owner GUANGZHOU SHIRUI ELECTRONICS