Electronic light pointer for a projection monitor
First Claim
Patent Images
1. A cursor positioning system for a computer system having a projection display monitor including a screen, comprisinglight sensor means for detecting a raster scan trace at a selected location near the surface of the screen of the projection display monitor;
- means responsive to said sensor means for generating position signals representative of the selected location on the screen of the projection display monitor;
means for generating cursor signals adapted for controlling the position of a cursor on the screen of the projection display monitor in response to said position signals;
whereby said light sensor means designates a high resolution cursor on said screen of the projection display monitor, said high resolution cursor having a resolution close to one pixel.
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Abstract
A cursor positioning device for a computer system having a projection display monitor including a screen. A light pointer in the form of an elongated housing is positioned with its tip at a selected location on the screen. A light sensor detects the raster scan trace and transmits a timed electrical signal to an interface, which determines the coordinates of the selected location for use by a computer in controlling the position of the cursor on the projection screen.
35 Citations
14 Claims
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1. A cursor positioning system for a computer system having a projection display monitor including a screen, comprising
light sensor means for detecting a raster scan trace at a selected location near the surface of the screen of the projection display monitor; -
means responsive to said sensor means for generating position signals representative of the selected location on the screen of the projection display monitor; means for generating cursor signals adapted for controlling the position of a cursor on the screen of the projection display monitor in response to said position signals;
whereby said light sensor means designates a high resolution cursor on said screen of the projection display monitor, said high resolution cursor having a resolution close to one pixel. - View Dependent Claims (2, 3)
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4. A computer display system comprising
a computer; -
a projection video display monitor for projecting raster scanned image data, coupled to said computer; a screen for displaying said image data; a light pointer, the pointer including means for detecting a raster scan trace at a selected location near the surface of the screen of the projection display monitor and means for generating a timed electrical signal in response to the raster scan trace; interface means, coupled to the light pointer and the computer, for translating the timed electrical signal into position signals representative of the selected location on the screen; the computer generating cursor signals adapted for controlling the position of a cursor on the screen of the projection display monitor in response to said position signals;
whereby said light pointer designates a high resolution cursor on said screen, said high resolution cursor having a resolution close to one pixel. - View Dependent Claims (5, 6, 7)
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8. A pointer device for controlling the position of a cursor in a computer system having a projection display monitor including a screen, comprising
an elongated housing, having a handle portion and a tip; -
said tip including a light sensor for detecting a raster scan trace at a selected location near the surface of the screen of the projection display monitor; signal generating means, coupled to said light sensor, for generating a timed electrical signal in response to the detected raster scan trace; and interface means, coupled to the light pointer and the computer, for translating the timed electrical signal into position signals representative of the selected location on the screen; whereby the computer generates cursor signals adapted for controlling the position of a cursor on the screen of the projection display monitor in response to said position signals; and
whereby said tip of said pointer device designates a high resolution cursor on said screen of the projection display monitor, said high resolution cursor having a resolution close to one pixel. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification