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:
Oct. 10, 2006
Filed:
Jan. 24, 2003
Tooru Suyama, Kyoto, JP;
Tsutomu Sakakibara, Kyoto, JP;
Tomokazu Kojima, Ibaraki, JP;
Tetsuro Ohmori, Hirakata, JP;
Yoshito Date, Otsu, JP;
Yasuyuki Doi, Nagaokakyo, JP;
Masahiro Akabori, Osaka, JP;
Kenji Miyake, Moriyama, JP;
Miki Fujino, Takatsuki, JP;
Takahito Kushima, Takatsuki, JP;
Tsukasa Kawahara, Nagaokakyo, JP;
Kazuhiko Nagaoka, Ibaraki, JP;
Shinji Miyamoto, Nagaokakyo, JP;
Yoshiyuki Konishi, Oumihachiman, JP;
Tooru Suyama, Kyoto, JP;
Tsutomu Sakakibara, Kyoto, JP;
Tomokazu Kojima, Ibaraki, JP;
Tetsuro Ohmori, Hirakata, JP;
Yoshito Date, Otsu, JP;
Yasuyuki Doi, Nagaokakyo, JP;
Masahiro Akabori, Osaka, JP;
Kenji Miyake, Moriyama, JP;
Miki Fujino, Takatsuki, JP;
Takahito Kushima, Takatsuki, JP;
Tsukasa Kawahara, Nagaokakyo, JP;
Kazuhiko Nagaoka, Ibaraki, JP;
Shinji Miyamoto, Nagaokakyo, JP;
Yoshiyuki Konishi, Oumihachiman, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A compact-size driving voltage controller is provided which can be driven with low power. The compact-size driving voltage controller which can be driven with low power includes a High output operational amplifier and a Low output operational amplifier for supplying driving voltages VcomH, VcomL to a load such as a liquid crystal display panel, an output switch for alternating between the outputs of the operational amplifiers, a Low voltage setting operational amplifier for generating a set voltage to be supplied to the non-inverted input terminal of the Low output operational amplifier, a set voltage generator including a current mirror circuit and a clamping circuit, a bias current controller for controlling the bias current flowing in each operational amplifier with a predetermined timing, and a timing controller for controlling the changeover timing of the output switch.