Browse Prior Art Database

CONTACTLESS ADDRESSABLE LIQUID CRYSTAL DISPLAY

IP.com Disclosure Number: IPCOM000023659D
Original Publication Date: 1978-Oct-31
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal

Abstract

The contactless, addressable liquid crystal display is con-structed by depositing an interdigital transducer 1 on the upper face of a piezoelectric substrate 2 (for example, lithium niobate, YZ cut) while the lower face is metalized 3 and electrically grounded. A high resistivity, room temper-ature, liquid crystal thin film 4 is deposited on substrate 2. A bulk n-type semiconductor 5 with a thin oxidized surface 6 is placed on top of the film 4, and a metallic-coated 7 glass slide 8 covers the semiconductor. The interdigitated trans-ducer 1 is driven by amplifier 10 and conductive coating 7 is separately driven by amplifier 9.