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Optical Touch X-Y Display Interactive Control

IP.com Disclosure Number: IPCOM000051142D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 59K

Publishing Venue

IBM

Related People

Ii, LB: AUTHOR [+2]

Abstract

An optical X-Y panel 2 for a display 1 provides an X-Y positioning input for an operator's finger pointing to a particular location on the display 1. As is shown in Fig. 1, the panel 2 is a frame having a first Y side with a layer sequence of lights 6 defining the Y coordinate on the display 1 and a second X side having a linear sequence of lights 4 defining the X coordinates for the display 1. On the opposing side of the frame 2 for the R array of lights 4, there is a corresponding linear sequence of photo-cells 5. On the opposing side of the frame 2 for the Y array of lights 6, there is a corresponding linear sequence of photo-cells 7.

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Optical Touch X-Y Display Interactive Control

An optical X-Y panel 2 for a display 1 provides an X-Y positioning input for an operator's finger pointing to a particular location on the display 1. As is shown in Fig. 1, the panel 2 is a frame having a first Y side with a layer sequence of lights 6 defining the Y coordinate on the display 1 and a second X side having a linear sequence of lights 4 defining the X coordinates for the display 1. On the opposing side of the frame 2 for the R array of lights 4, there is a corresponding linear sequence of photo-cells 5. On the opposing side of the frame 2 for the Y array of lights 6, there is a corresponding linear sequence of photo-cells 7. When the operator inserts his finger into the region surrounded by the frame 2, his finger will interrupt an X light beam 4 and a Y light beam 6, and the corresponding, previously illuminated photo-cells 5 and 7, respectively, will output corresponding X and Y coordinates to the X-Y interactive logic 8, indicating the location of the operator's finger on the display

In conventional optical X-Y panels 2, objects inadvertently introduced into the space surrounded by the frame 2 will cause the registration of X-Y coordinates by the X-Y interactive logic 8. To prevent any inadvertent breaking of the light beams 4 and 6, a touch panel 3, shown in cross-section in Fig. 2, is placed between the frame 2 and the display 1. The touch panel comprises two transparent electrode plates 13 and 15 wh...