Computer controlled, overhead projector display
First Claim
1. A teaching apparatus comprising:
- a frame adapted for support above an illumination window of an overhead projector;
a transmissive video display mounted in said frame above said illumination window of said overhead projector such that an image on said display is projected by said projector;
a touch screen mounted in said frame overlaying said display;
means for decoding touch points on said touch screen; and
means for driving said display to display text and/or images based on said touch points.
1 Assignment
0 Petitions
Accused Products
Abstract
Apparatus for demonstrating the use of a computer terminal comprises a projection module supported on a standard overhead projector. The projection module includes a frame which is adapted to rest on an illumination window of the overhead projector. A transmissive liquid crystal display is mounted in the frame parallel to the illumination window such that an image on said liquid crystal display is projected by the projector. A transparent touch screen is also mounted in the frame overlaying the liquid crystal display. By means of a stylus, a user touches the touch screen and thereby designates desired text and/or images for subsequent display. Coupled to the decoder is a computer which retrieves the desired text and/or images which are then transmitted to a display driver. The aforesaid apparatus is most suited to demonstrate a computer terminal which has a touch screen for selecting text and/or images for display.
96 Citations
15 Claims
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1. A teaching apparatus comprising:
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a frame adapted for support above an illumination window of an overhead projector; a transmissive video display mounted in said frame above said illumination window of said overhead projector such that an image on said display is projected by said projector; a touch screen mounted in said frame overlaying said display; means for decoding touch points on said touch screen; and means for driving said display to display text and/or images based on said touch points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A teaching apparatus comprising:
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an overhead projector having an illumination window and light means for projecting light through said window; a transmissive video display supported above said illumination window of said overhead projector such that an image on said display is projected by said projector; a touch screen overlaying said display; means for decoding touch points on said touch screen; and means for driving said display to display text and/or images based on said touch points. - View Dependent Claims (10, 11)
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12. An input/output video module comprising:
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a housing adapted for support above an illumination window of an overhead projector; a transmissive video display mounted in said housing above said illumination window of said overhead projector such that an image on said display is projected by said projector; and a touch screen mounted in said housing overlaying said display for designating points on said video display. - View Dependent Claims (13, 14, 15)
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Specification