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. 27, 1996
Filed:
Nov. 18, 1994
Masateru Itoh, Nagaokakyo, JP;
Hiroshi Kawamura, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A convergence adjustment circuit and a projection type display apparatus provided with convergence adjustment circuit, including a fixed gain adjustment circuit which controls the waveform and level of an analog signal, wherein the analog signal is adjusted roughly in the fixed gain adjustment circuit and (the analog signal is adjusted) finely in the digital adjustment circuit thereby reducing the effect of the temperature characteristics and resolution the effect of the temperature characteristics and resolution and making it possible to carry out adjustment of convergence with high accuracy. A geomagnetism sensor circuit may also be provided for sensing changes in geomagnetism and outputting a signal for adjusting convergence to cancel out the effects of geomagnetism.