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:
May. 01, 2007
Filed:
Apr. 01, 2003
Shiro Nagaoka, Fukuroi, JP;
Shiro Nagaoka, Fukuroi, JP;
Pioneer Corporation, Tokyo, JP;
Pioneer Display Products Corporation, Shizuoka, JP;
Abstract
A display panel includes row and column electrodes. Capacitive light-emitting elements are provided at crossing portions of the row and column electrodes. A drive unit drives the display panel in response to an input image signal. The drive unit includes a column electrode driver for applying a pixel data pulse to each of the column electrodes. The pixel data pulse has a pulse voltage corresponding to pixel data derived from the input image signal. The column electrode driver includes a power source circuit for generating a resonance pulse power source voltage having a predetermined resonance amplitude. The power source circuit also applies the. resonance pulse power source voltage to a power source line. The column electrode driver also includes a pixel data pulse generator circuit for selectively connecting the column electrodes with the power source line based on the pixel data, to apply the pixel data pulse to the column electrodes. The column electrode driver also includes a DC drive prevention circuit for forcibly grounding the power source line while the resonance pulse power source voltage is dropping, if an intermediate value of the resonance amplitude is greater than a predetermined reference voltage.