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:
Dec. 16, 2014
Filed:
Jun. 30, 2009
Douglas Piasecki, Austin, TX (US);
Thomas S. David, Austin, TX (US);
Timothy Thomas Rueger, Austin, TX (US);
Stefan Mastovich, Austin, TX (US);
Jia-hau Liu, Austin, TX (US);
Douglas Piasecki, Austin, TX (US);
Thomas S. David, Austin, TX (US);
Timothy Thomas Rueger, Austin, TX (US);
Stefan Mastovich, Austin, TX (US);
Jia-Hau Liu, Austin, TX (US);
Silicon Laboratories Inc., Austin, TX (US);
Abstract
An LCD controller includes a charge pump circuit for generating a charge voltage responsive to an external voltage and a clock signal. An oscillator generates the clock signal responsive to at least one bias voltage. The oscillator has a high power mode of operation and a low power mode of operation. Bias circuitry for applies the at least one bias voltage to the oscillator. The at least one bias voltage is applied to the oscillator from an external source in the high power mode of operation and the at least one bias voltage is applied to the oscillator from a source within the oscillator in the low power mode of operation. An LCD driver voltage circuit generates a plurality of LCD driver voltages for driving segments of an LCD display responsive to the charge voltage.