Browse Prior Art Database

ELECTRIC BRIGHTNESS/ CONTRAST ENHANCING FILM

IP.com Disclosure Number: IPCOM000021369D
Original Publication Date: 2000-Nov-01
Included in the Prior Art Database: 2004-Jan-16
Document File: 1 page(s) / 172K

Publishing Venue

Sony Technical Digest

Related People

Ajay Sharma: INVENTOR

Abstract

All television sets have a problem with obtaining the optimum brightness/contrast for viewing, and this is because the external viewing conditions can change. After all, some people watch television in a bright room and others watch in a dark room. The television sets are normally designed to adjust for the middle ground - delivering decent brightness and contrast.

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Sony Technical Digest, Volume 3, November 2000, ISSN 1521-5180

ELECTRIC BRIGHTNESS/ CONTRAST ENHANCING FILM

Invention by: Ajay Sharma

All television sets have a problem with obtaining the optimum brightness/contrast for viewing, and this is because the external viewing conditions can change. After all, some people watch television in a bright room and others watch in a dark room. The television sets are normally designed to adjust for the middle ground - delivering decent brightness and contrast.

This idea improves on the "decent" brightness and contrast delivered by most television sets during varied viewing conditions by using a thin film material that conducts current and changes the transmittance. The film is attached to a light sensor that can measure the ambient light that the television receives. Thus, when the lighting in the room is bright, the current will be applied to the film, giving the screen a good contrast by lowering the transmittance of the film. When the room is dark, the transmittance of the film will be increased by a current, allowing a brighter picture to be shown. The film will be applied to the outside of the face of the glass after the manufacture of the television set. The invention will be controlled by the chassis because the thickness of the film used in this invention will always be the same and the current needed to change the transmittance will always be the same as well.

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Page 26 Sony Technical Digest, Volume 3