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:
Jan. 12, 1999
Filed:
Feb. 20, 1997
Jun-Hee Kim, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
A gradation driving circuit is provided that outputs gamma-corrected gray scale voltages. First and second multiplexors select first and second source voltages, respectively, in response to input data. The first source voltage is scaled by an appropriate factor corresponding to a required amount of gamma correction. The scaling factor is selected based on an additional output from the second multiplexor. The scaled first voltage is then subtracted from the second source voltage and the difference is output as the gray scale voltage. Alternatively, the gray scale voltage can be obtained by adding the first scaled source voltage and the second source voltage.
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