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:
Apr. 03, 2007
Filed:
Aug. 31, 2004
Yoshiyuki Okuda, Saitama, JP;
Yoshiyuki Okuda, Saitama, JP;
Pioneer Corporation, Tokyo, JP;
Abstract
An apparatus for driving a light-emitting display controls the light-emission of light-emitting elements in such a manner that a driving current or driving voltage having a prescribed value to be supplied to the light-emitting elements is turned on or off by an on/off signal from a driving unit. The driving apparatus includes a pixel read section for reading the luminance values for the light-emitting elements in a frame period from an image signal and a ΔΣ modulator which operates in a sub-frame period which is 1/n of the frame period according to the luminance values read by the pixel read section. The output of '1' or '0' from ΔΣ modulator is served as the on/off signal. The driving apparatus can further includes a random data generator for providing random luminance values for the individual pixels. In an image displaying operation, the output from the random data generator is directly supplied to the ΔΣ modulator in place of the output from the pixel read section, or otherwise added to the output from the pixel read section. This configuration provides an image with good quality and naturalness in the luminance by the driving at low speed.