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. 15, 2013
Filed:
May. 18, 2009
Daisuke Ito, Minato-ku, JP;
Yoshitoshi Kida, Minato-ku, JP;
Takeya Takeuchi, Minato-ku, JP;
David Pusey, Basingstoke, GB;
Peter Shadwell, Tadley, GB;
Shunsuke Noichi, Minato-ku, JP;
Daisuke Ito, Minato-ku, JP;
Yoshitoshi Kida, Minato-ku, JP;
Takeya Takeuchi, Minato-ku, JP;
David Pusey, Basingstoke, GB;
Peter Shadwell, Tadley, GB;
Shunsuke Noichi, Minato-ku, JP;
Sony Corporation, Tokyo, JP;
Abstract
An ambient light detection device for use with a liquid crystal display having an array of liquid crystal cells, each liquid cell having at least one transistor for selectively connecting that liquid crystal cell to a signal line and each transistor having a gate connected to a gate line and having a gate supply line selectively connectable to the gate line for turning off the gates. The device includes a current measuring circuit configured to measure the current flowing in the gate supply line as a result of gate leakage current in the gates to which the gate supply line is connected and a controller connected to the measuring circuit and configured to calculate, from the measured current, the level of ambient light reaching the gates.