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:
Jun. 11, 2002
Filed:
Jan. 09, 2001
John R. A. Ayres, Reigate, GB;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A charge pump circuit ( ) comprises a series of voltage boosting stages ( ), each stage ( ) comprising a switching means ( ) and a capacitive element ( ) connected in series between the input to the stage and a respective voltage control terminal ( ). The voltage control terminals ( ) comprise at least two groups of terminals receiving respective timed control voltages, and adjacent stages ( ) are associated with different terminal groups. The switching means ( ) of one or more stages ( ) comprises a lateral PIN junction diode. The use of diodes enables the charge pump circuit itself to operate from a lower supply voltage than is possible with the use of TFTs. The use of lateral PIN diodes enables the charge pump circuit to be formed using the same processing as may be required for TFT's of the circuit to which the boosted voltage is supplied. This enables the charge pump circuit to be formed on a common substrate with higher voltage TFT circuitry for, for example, an AMLCD.