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Optical Touch Device And Method For Calculating Coordinate Of Touch Point

一种光学触控、检测方法的技术，应用在仪器、计算、电数字数据处理等方向，能够解决误判或干扰、辨识与计算触控点数量复杂等问题，达到增进准确度的效果

Active Publication Date: 2015-06-03
WISTRON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing optical touch device is used for a single-point touch of a single finger, the position of the touch point of the finger can be calculated relatively simply by using triangulation. When controlling the time, it is more complicated to identify and calculate the number of touch points, and it is easy to cause misjudgment or interference, which needs to be solved

Method used

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  • Optical Touch Device And Method For Calculating Coordinate Of Touch Point
  • Optical Touch Device And Method For Calculating Coordinate Of Touch Point
  • Optical Touch Device And Method For Calculating Coordinate Of Touch Point

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Embodiment Construction

[0048] The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

[0049] see figure 1 as well as figure 2 , figure 1 is a schematic diagram of an optical touch device 1 according to an embodiment of the present invention, figure 2 for figure 1 A functional block diagram of the optical touch device 1 in . Such as figure 1 and figure 2 As shown, the optical touch device 1 includes an indication plane 10, a first image sensing unit 12, a second image sensing unit 14, a third image sensing unit 16, a fourth image sensing unit 18 and A processing unit 20 , wherein the processing unit 20 is electrically connected to the first image sensing unit 12 , the second image sensing unit 14 , the third image sensing unit 16 and the fourth image sensing unit 18 .

[0050] In practical applications, the indicating plane 10 can be a display panel (for example, a liquid crysta...

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PUM

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Abstract

An optical touch device utilizes two images sensed by two image sensing units, which are diagonal to each other, to determine whether a number of touch points located at a central touch area is equal to 1. When the number of touch points are larger than 1, the optical touch device further utilizes another two images sensed by another two image sensing units, which are also diagonal to each other, to assist in determining the number of touch points located at the central touch area, so as to improve the accuracy of determination.

Description

technical field [0001] The present invention relates to an optical touch device and a touch point detection method, in particular to an optical touch device and a touch point detection method capable of accurately determining the number of touch points. Background technique [0002] Since current consumer electronic products are all designed to be light, thin, short, and small, there is no space on the product to accommodate traditional input tools such as a mouse and a keyboard. With the advancement of optical touch device technology, optical devices have been widely used in various consumer electronics products, such as monitors, all-in-ones (All in One), mobile phones, personal digital assistants (Personal Digital Assistant, PDA), etc. The touch device is used as a tool for its data input. At present, compared with other touch technologies, such as resistive, capacitive, ultrasonic or projected image, optical touch devices have the advantages of lower cost and easier imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
CPCG06F3/0421G06F3/0488G06F2203/04104G06F3/04883
Inventor 陈士文陈裕彦卓卿安
Owner WISTRON CORP