The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2017
Filed:
Apr. 14, 2015
Wistron Corporation, New Taipei, TW;
Kuo-Hsien Lu, New Taipei, TW;
Yu-Yen Chen, New Taipei, TW;
Wistron Corporation, New Taipei, TW;
Abstract
A method for defining effective pixels in an image sensing array of a light-shading optical touch system is proposed. First, light-shading objects are disposed at three end points of a touch panel, and a shaded image is generated by an image sensing array. Light-shading object pixels corresponding to the light-shading objects are obtained from the shaded image thereafter. Next, the light-shading objects are removed from the touch panel, and a non-shaded image is generated by the image sensing array. Three pixel columns corresponding to the end points are obtained from the non-shaded image, and a pixel with maximum intensity is obtained from each of the three pixel columns. Interpolated pixels between the three brightest pixels are obtained through interpolation from the non-shaded image. Image sensing pixels corresponding to the three brightest pixels and the interpolated pixels in the image sensing array are defined as effective pixels.