Pager with automatically illuminated display
First Claim
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1. A pager comprising:
- a receiver for receiving a paging signal bearing an address of said pager and a message;
means for detecting said address in the received signal;
means for displaying said message in response to the detection of said address;
a light sensor for generating a second signal indicating that ambient light has a luminance lower than a predetermined value;
means for detecting a coincidence between the presence of said message on said display means and the generation of said second signal; and
a light source for illuminating said display means in response to the detection of said coincidence.
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Abstract
A pager comprising a light sensor which is responsive to light externally illuminating the pager to generate a first signal when the sensed light is below a predetermined luminance value. The first signal is supplied to a coincidence gate which provides a coincidence output when it detects the coincidence of the first signal with a second signal that is generated when there is a message on a display. The coincidence output feeds a light source to illuminate the display to make it visible under poor lighting conditions.
19 Citations
7 Claims
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1. A pager comprising:
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a receiver for receiving a paging signal bearing an address of said pager and a message; means for detecting said address in the received signal; means for displaying said message in response to the detection of said address; a light sensor for generating a second signal indicating that ambient light has a luminance lower than a predetermined value; means for detecting a coincidence between the presence of said message on said display means and the generation of said second signal; and a light source for illuminating said display means in response to the detection of said coincidence. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification