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. 10, 2006
Filed:
Oct. 12, 2000
Masashi Nogawa, Suita, JP;
Masashi Nogawa, Suita, JP;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
To improve the display quality in the scanning of a dynamic drive system by effectively preventing the erroneous display of the display elements that are connected to the scanning electrodes during non-selection. The erroneous lighting cancel circuithas a number of (or assemblies of) dummy diodes MD used for erroneous lighting prevention that is equal to the number of common lines CL, and along with the anode of each dummy diode MD, MD, MD, MDbeing electrically connected to each corresponding common line CLO, CL, CL, CLby means of suitable wiring, the cathode of each dummy diode MD, MD, MD, MDis electrically connected to a terminal of a reference potential (for example, ground potential) through the medium of a shared switchand a constant current source circuit (active load). The control signal SG reaches an active state (H level) only for a prescribed time during the scanning drive period for each horizontal scanning period, and the switchis placed in the ON state. During this prescribed time, the positive charge that is present on each common line CLO, CL, CL, CLis discharged at a constant current to the ground side through the medium of each dummy diode MD, MD, MD, MD, the ON state of the switch, and the constant current source circuit