Circuit control devices utilizing electronic display screen light
First Claim
1. A control device for providing a control signal to electrical apparatus wherein at least one photosensor in said control device detects movement of a moveable member which photosensor responds to light produced by a light source, wherein the improvement comprises:
- said control device being disposed in front of an electronic image display screen within an image display area thereof which display screen displays changeable images conveying information pertinent to operation of the control device, said display screen also being said light source, further including a display screen controller coupled to said image display screen and being conditioned to cause display of a light pattern at said image display area which light pattern is viewed by said photosensor, said moveable member being positionable to cause said photosensor to view any of a plurality of locations in said light pattern and wherein said photosensor produces a location sensing signal in response to light produced by the display screen at a selected location in the light pattern, and, a digital data processor receiving said location sensing signal and being conditioned to vary the value of said control signal in response to location sensing signals originating from different ones of said locations in said light pattern.
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Accused Products
Abstract
A control device provides a variable control signal to electrical apparatus and has a control member, such as a stylus or a turnable or slidable member, that is manipulated to vary the signal. Photoelectric sensors detect and track movement of the control member. The control member is disposed at the face of an electronic image display screen which can display calibration marks, identifying labels, current setting and/or other graphics pertinent to operation of the control device. The display screen also operates as the light source for the photoelectric sensors.
124 Citations
12 Claims
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1. A control device for providing a control signal to electrical apparatus wherein at least one photosensor in said control device detects movement of a moveable member which photosensor responds to light produced by a light source, wherein the improvement comprises:
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said control device being disposed in front of an electronic image display screen within an image display area thereof which display screen displays changeable images conveying information pertinent to operation of the control device, said display screen also being said light source, further including a display screen controller coupled to said image display screen and being conditioned to cause display of a light pattern at said image display area which light pattern is viewed by said photosensor, said moveable member being positionable to cause said photosensor to view any of a plurality of locations in said light pattern and wherein said photosensor produces a location sensing signal in response to light produced by the display screen at a selected location in the light pattern, and, a digital data processor receiving said location sensing signal and being conditioned to vary the value of said control signal in response to location sensing signals originating from different ones of said locations in said light pattern. - View Dependent Claims (2)
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3. A control device for providing a control signal to electrical apparatus wherein at least one photosensor in said control device detects movement of a moveable member which photosensor responds to light produced by a light source, wherein the improvement comprises:
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said control device being disposed in front of an electronic image display screen within an image display area thereof which display screen displays changeable images conveying information pertinent to operation of the control device, said display screen also being said light source, further including a display screen controller coupled to said image display screen and being conditioned to cause display of a light pattern wherein different locations in said light pattern are viewed by said photosensor as said moveable member is moved through settings thereof, said display screen controller being further conditioned to move a light variation through the locations in said light pattern which light variation is detectable by said photosensor to produce a location sensing signal. - View Dependent Claims (4, 5, 6)
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7. A control device for providing a control signal to electrical apparatus wherein at least one photosensor in said control device detects movement of a moveable member which photosensor responds to light produced by a light source, wherein the improvement comprises:
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said control device being disposed in front of an electronic image display screen within an image display area thereof which display screen displays changeable images conveying information pertinent to operation of the control device, said display screen also being said light source, wherein said moveable member is a stylus having an end which may be placed at a selected location in front of said image display area, said photosensor being secured to said stylus and being oriented to view a portion of said image area of said display that is offset from said end of said stylus, said end of said stylus defining an axis of rotation about which said stylus may be turned and wherein said photosensor is positioned on said stylus to view selected locations on said image display area that lie along a path which extends around said axis of rotation. - View Dependent Claims (8, 9, 10, 11)
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12. A control device for providing a control signal to electrical apparatus wherein at least one photosensor in said control device detects movement of a moveable member which photosensor responds to light produced by a light source, wherein the improvement comprises:
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said control device being disposed in front of an electronic image display screen within an image display area thereof which display screen displays changeable images conveying information pertinent to operation of the control device, said display screen also being said light source, wherein said moveable member is a stylus having an end which may be placed at a selected location in front of said image display area, said photosensor being secured to said stylus and being oriented to view a portion of said image area of said display that is offset from said end of said stylus.
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Specification