Touch screen positioning method based on partial scanning
A positioning method and touch screen technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problem of affecting the chip reporting rate, wasting chip storage and computing resources, occupying storage resources and computing resources, etc. problems, to reduce the use of storage resources and computing resources, and improve efficiency
Inactive Publication Date: 2014-07-30
南京梅花软件系统股份有限公司
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Problems solved by technology
The full excitation and full scan method greatly wastes the storage and computing resources of the chip
Especially since the emergence of high-resolution touch screens (up to 32*20) since 2013, the original full-stimulation and full-scanning method has become a major source of chip power consumption and has taken up a lot of storage and computing resources. Affected the reporting rate of the chip
There is a lack of a new touch scanning positioning method for the touch screen in the prior art, so as to reduce the utilization of storage resources and computing resources and improve the efficiency of the touch screen control chip
Method used
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[0019] Below in conjunction with accompanying drawing and embodiment the technical solution of the present invention is described in further detail:
[0020] The schematic diagram of the method steps of the local scan-based touch screen positioning method according to the present invention is as follows figure 2 As shown, a 32*20 touch screen is used as an embodiment, and the specific steps are as follows:
[0021] Step 1: This project first adopts a sparse scanning method (for example, for a 32*20 touch screen, first scan according to 4*4), that is, take 4 excitation terminals of the touch screen, and these 4 excitation terminals divide the touch screen into 5 parts. The 5 parts are as consistent in size as possible, and the control of the touch screen stimulates these 4 lines; take the 4 signal receiving ends of the touch screen, and these 4 signal receiving ends divide the touch screen into 5 parts. voltage change signal.
[0022] Step 2: Divide the touch screen into 25 ...
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The invention discloses a touch screen positioning method based on partial scanning. Aiming at touch positioning, a sparse scanning mode is firstly adopted to generally confirm a touch area; secondly, a partial scanning mode is adopted for the area; because of the high refresh rate, the spot report rate is not affected in the mode, but the power consumption is greatly lowered, and the efficiency are greatly improved. For positioning algorithm, a five-point centroid method is adopted for positioning. By adopting the touch screen positioning method disclosed by the invention, the consumption of storage resources and calculation resources can be effectively reduced, and the efficiency of a touch screen control chip is improved.
Description
technical field [0001] The invention discloses a touch screen positioning method based on partial scanning, and relates to the technical field of position positioning algorithms in touch screen control chips. Background technique [0002] With the development of science and technology and society, more and more touch-sensitive electronic products appear in people's lives. Touch-control products are more and more sought after due to their advantages such as simple operation, convenient portability, and space saving. The main products in the current market include: touch-control mobile phones, laptop computers, personal digital processing (PDA), etc. In the future, touch technology will be used in more and more fields. As a human-computer interaction input device, the touch screen is gradually replacing the keyboard and mouse and becoming an important part of electronic products. The capacitive touch screen is made by plating indium tin oxide on the glass, then etching, hot-p...
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IPC IPC(8): G06F3/041
Inventor 夏旻翁理国胡凯方元李鹏
Owner 南京梅花软件系统股份有限公司