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:
Mar. 23, 2004
Filed:
Jun. 25, 1999
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A white balance adjusting apparatus includes a test signal source for generating a black signal for testing and a white signal for testing, a first impedance means for converting currents flowing through three drive transistors for amplifying primary color R, G, B signals into voltages, a second impedance means connected in parallel with the first impedance means, a switch which is selectively closed to flow a current through the second impedance means, a reference voltage source for generating a first reference voltage at the time of performing the cut-off adjustment and a second reference voltage at the time of performing the drive adjustment, a comparator for comparing the levels between the reference voltages of the reference voltage sources and the output voltage converted by the first or second impedance means, and a microcomputer which generates a control signal for adjusting the white balance on the basis of the output signal of the comparator and adjusts the DC level and the AC level of each of the primary colors of R, G, B.