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Multi-image Liquid Crystal Display

IP.com Disclosure Number: IPCOM000059845D
Original Publication Date: 1986-Jan-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Leff, J: AUTHOR

Abstract

Multiple image liquid crystal displays utilize selective erase (a) to create a three dimensional effect with a single drawing, or (b) highlight differences between different drawings and especially between a drawing and its modification.

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Multi-image Liquid Crystal Display

Multiple image liquid crystal displays utilize selective erase (a) to create a three dimensional effect with a single drawing, or (b) highlight differences between different drawings and especially between a drawing and its modification.

The three dimensional effect with a single drawing is obtained as follows: 1. Create a gray screen by drawing a completely black screen with reduced laser power. 2. Draw a negative image by selectively erasing the gray background. 3. Draw a positive image with high laser power which is offset from the negative image. This is done by starting the positive image at a small distance on the y scale below the negative image.

Highlighting deleted features between a drawing and its modification is obtained as follows: 1. Create a gray screen by drawing a completely black screen with reduced laser power. 2. Draw a negative image of the drawing by selectively erasing the gray background. 3. Draw a positive image of the modification with high laser power directly over the negative image.

Highlighting added features between a drawing and its modification is obtained as follows: 1. Create a gray screen by drawing a completely black screen with reduced laser power. 2. Draw a negative image by the modification by selectively erasing the gray backgro 3. Draw a positive image of the drawing with high laser power directly over the negative image.

The methods described above for highlighting differences will prov...