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:
May. 29, 2012
Filed:
Dec. 05, 2006
Martin Gerard Hendrik Hiddink, Eindhoven, NL;
Siebe Tjerk DE Zwart, Eindhoven, NL;
Martin Gerard Hendrik Hiddink, Eindhoven, NL;
Siebe Tjerk De Zwart, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A drive method and apparatus is provided for a 2D/3D autostereoscopic display with a switchable lens array having an electrically switchable refractive index, between an array of row electrode lines and an array of column electrode lines to control the switching of the lens elements. The drive signals comprise: a row select voltage waveform (Rsw), —a column select voltage waveform (Csw), —and a common row and column de-select voltage waveform (Vbase). The waveforms each comprise a substantially square wave voltage waveform, each waveform having the same period. The three waveforms are time staggered with respect to each other with a phase shift of 2/3 or 4/3 between each waveform and each other waveform. This arrangement provides polarity inversion voltage waveforms when switching voltages are applied to the lens elements, and with maximized RMS voltage.