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. 16, 1992
Filed:
Jul. 12, 1989
Shuuhei Yasuda, Nara, JP;
Nobuyoshi Nagashima, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A liquid crystal projection apparatus includes first, second and third liquid crystal display panels, first, second and third liquid crystal display panel driving circuits and a control circuit. The liquid crystal projection apparatus projection apparatus projects and displays pictures of the first, second and third liquid crystal display panels superimposing them on a screen. Each of the first, second and third liquid crystal display panel driving circuits applies driving voltages based on display data to scanned liquid crystal portions in the corresponding liquid crystal display panel. The driving voltages are inverted in polarity for every horizontal scanning period and also for every frame. In addition, at least one of the first, second and third liquid crystal display panels receives driving voltages of opposite polarities with respect to the remaining two panels.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile