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:
Jun. 10, 1997
Filed:
Sep. 05, 1995
Takashi Nakamura, Shiga, JP;
Otsuka Electronics Co., Ltd., Osaka, JP;
Abstract
A display screen inspecting method wherein, a plurality of display picture elements are selected, as markers, from a display screen and light receiving picture elements corresponding to the display picture elements are selected. The light amounts of the display picture elements are measured using the light receiving picture elements and each of the light amounts thus measured is fitted to a predetermined function form symmetric with respect to the center thereof such that the center of each display position is obtained. The difference in position between each of the center positions and each of the specified corresponding light receiving picture elements is obtained and based on such positional differences, a strain of the display screen or a positional shift between the display screen and an inspection screen, in terms of a positional function, is obtained. Portions where moire fringes will occur, are estimated; but the light receiving signals of light receiving picture elements present at the portions where moire fringes occur. An inspection screen is reconstructed based on the light receiving signals of the remaining light receiving picture element; and there is obtained the relationship between the received light amount of the light receiving picture elements on the inspection screen thus reconstructed and the display light amount of the display picture elements corresponding to the light receiving picture elements.