Methods and apparatus to detect an operating state of a display based on visible light
First Claim
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1. A device to detect an operating state of a display, the device comprising:
- a plurality of optical sensors disposed to detect humanly visible light emanating from a screen of the display and to convert the humanly visible light into an electrical signal, the plurality of optical sensors to be distributed adjacent edges of the screen to enable detection of an on state of the display even if only a portion of the display emanates visible light; and
a logic circuit coupled to the at least one optical sensor, the logic circuit being configured to generate an output signal indicative of the operating state of the display based on the electrical signal without affecting operation of the display,wherein the portion of the display emanating visible light is a picture-in-picture screen of the display and a main screen of the display does not emanate visible light.
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Abstract
Methods and apparatus to detect operating states of a display based on visible light are disclosed. An example device to detect an operating state of a display includes at least one optical sensor and a logic circuit. The at least one optical sensor is disposed to detect visible light emanating from a screen of the display and to convert the visible light into an electrical signal. The logic circuit is coupled to the at least one optical sensor to generate an output signal indicative of the operating state of the display based on the electrical signal.
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Citations
9 Claims
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1. A device to detect an operating state of a display, the device comprising:
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a plurality of optical sensors disposed to detect humanly visible light emanating from a screen of the display and to convert the humanly visible light into an electrical signal, the plurality of optical sensors to be distributed adjacent edges of the screen to enable detection of an on state of the display even if only a portion of the display emanates visible light; and a logic circuit coupled to the at least one optical sensor, the logic circuit being configured to generate an output signal indicative of the operating state of the display based on the electrical signal without affecting operation of the display, wherein the portion of the display emanating visible light is a picture-in-picture screen of the display and a main screen of the display does not emanate visible light.
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2. A device to detect an operating state of a display, the device comprising:
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at least one optical sensor disposed to detect humanly visible light emanating from a screen of the display and to convert the humanly visible light into an electrical signal, the at least one optical sensor distributed adjacent at least one edge of the screen to enable detection of an on state of the display even if only a portion of the display emanates visible light; and a logic circuit coupled to the at least one optical sensor, the logic circuit being configured to generate an output signal indicative of the operating state of the display based on the electrical signal, wherein the portion of the display emanating visible light is a picture-in-picture screen of the display and a main screen of the display does not emanate visible light. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification