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Optically Superposing Images on Vibrating Mirror ROLED Display

IP.com Disclosure Number: IPCOM000088746D
Original Publication Date: 1977-Jul-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Levine, JL: AUTHOR [+2]

Abstract

ambient and nonelectronic method is disclosed for superposing fixed or variable images or cursors on a vibrating mirror ROLED (rotating optical light-emitting diode) display.

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Optically Superposing Images on Vibrating Mirror ROLED Display

ambient and nonelectronic method is disclosed for superposing fixed or variable images or cursors on a vibrating mirror ROLED (rotating optical light- emitting diode) display.

One known method of flattening the image plane of a vibrating mirror ROLED display is by placing the pivot point of the mirror at the light-emitting diodes (LEDs) instead of in the plane of the mirror. The radius of curvature of the image plane thus resulting has a value of twice the radius previously employed. Since the space behind the mirror is unoccupied by any material object, a real object at the position of the virtual image would be visible if the mirror were semitransparent.

As shown in the figure, the real object may be self-illuminated, such as an incandescent lamp, or may be a translucent screen, placed to coincide with the plane of the virtual LED image, or may be an externally illuminated object, such as a piece of paper. The ratio of reflected-to-transmitted light may be adjusted by well-known means to control the relative intensity of the two images. In addition, since the LEDs are sometimes monochromatic, this fact may be taken advantage of by making the mirror dichroic, and thus have a reflectivity of 100% for the LED light. The superposed image would then be of a different color.

Objects which may be placed behind the mirror include, for example, business forms with blanks to be filled in, projections of quest...