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:
Mar. 01, 2011
Filed:
Aug. 18, 2008
Applicants:
Osamu Uchino, Chigasaki, JP;
Hiroaki Kohriyama, Yokohama, JP;
Yoshinobu Yamamoto, Fujisawa, JP;
Inventors:
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A liquid lens driverhas DC-DC converter, oscillator, pulse width modulator, and control logic circuit. The output buffer circuitdivides converter output voltage Vof a prescribed amplitude (voltage level), input as the power source voltage, into bipolar, that is, positive/negative, output voltages Out-A, Out-B for output, and, corresponding to the H/L level of PWM signal C, it turns ON/OFF the two output voltages Out-A, Out-B. In this way, from liquid lens driver, pulse width modulation (PWM) output voltages Out-A, Out-B are applied as driving voltage Von electrodesof liquid lens