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Surface positioning device and method based on linear image sensors

A linear image and positioning method technology, applied in the input/output process of instruments, data processing, electrical digital data processing, etc., can solve the problems of complex control timing, high cost, and many parameters, so as to avoid sampling and calculation, installation The effect of low space requirement and convenient installation

Inactive Publication Date: 2013-04-10
GUANGDONG VTRON TECH CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The advantage of this technology is that the frame rate is higher than that of infrared surface positioning, but because ordinary image sensors are generally relatively large in size and high in operating frequency, they need to operate at tens of megahertz, the control sequence is complex, and there are many parameters to be set, resulting in In addition to the complexity of this technology, more high-speed peripheral circuits are needed for control and calculation to obtain touch coordinate information
Therefore, the volume of this device is relatively large, and the cost is expensive.

Method used

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  • Surface positioning device and method based on linear image sensors
  • Surface positioning device and method based on linear image sensors
  • Surface positioning device and method based on linear image sensors

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Embodiment Construction

[0030] Such as figure 1 As shown, it is a schematic structural diagram of the surface positioning device based on the linear image sensor of the present invention.

[0031] The two linear image sensors are respectively installed in the upper left corner and the upper right corner of the positioning surface. The linear image sensor 1 in the upper left corner is installed obliquely to the lower right at 45°, and the linear image sensor 2 in the upper right corner is installed obliquely to the lower left at 45°, so that the two The imaging surface of the linear image sensor can capture the entire positioning surface. The left surface, the right surface, and the lower surface of the positioning surface are pasted with dark light-absorbing materials to prevent infrared light from being reflected when there is no touch event.

[0032] When no touch event occurs on the positioning surface, the infrared light emitted by the infrared light source is absorbed by the dark light-absorbin...

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Abstract

The invention provides a surface positioning device based on linear image sensors, comprising two linear image sensor modules mounted above a positioning surface as well as a light source module, wherein the linear image sensor modules and the light source module are connected with an image calculation module which is connected with a data transmission module, the data transmission module is connected with a computer, either linear image sensor module comprises a liner image sensor and an optical lens, and an image operating module comprises a singlechip and two analog-digital conversion chips corresponding to the linear image sensor modules and supplies clocks and control signals to the linear image sensor modules. In the invention, the positioning surface is shot by adopting the linear image sensors, and shot linear images are calculated and processed so that touch coordinates are acquired. Compared with the prior art, the invention has small size, low cost and high frame rate.

Description

【Technical field】 [0001] The invention relates to a surface positioning touch device of a graphic user interface, in particular to a surface positioning device based on a linear image sensor and a surface positioning method using the device. 【Background technique】 [0002] Current surface positioning technology is generally based on infrared. The method is to emit infrared light on one side of the positioning surface, and determine whether a touch event occurs on the positioning surface and locate the touch coordinates by detecting whether the infrared light is blocked on the other side. The disadvantage of this method is that the frame rate is low, and the installation and debugging are complicated. Due to the physical properties of infrared emitting tubes and receiving tubes, they cannot work at very high frequencies, which determines that the frame rate of infrared surface positioning methods cannot be increased. Moreover, the infrared receiving tube needs to receive the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 肖玉生
Owner GUANGDONG VTRON TECH CO LTD
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