Input interface apparatus for large screen display
First Claim
1. An input interface apparatus for a large screen display having a light-transmissive screen, a pointing position detecting means on said screen, and an image signal source, comprising:
- (1) light-pen means for emitting infrared rays includingpressing force detecting means for detecting the pressure force when a tip of said light-pen means is pressed against said screen first;
first modulating means for modulating, with a first type of modulation, the output of infrared rays according to said detected pressing force;
switching means switching to a conductive state when the pressing force against said screen exceeds a predetermined value; and
second modulating means for further modulating, with a second type of modulation the infrared rays modulated by said first modulating means;
(2) infrared ray modulation signal detecting means including;
infrared ray detecting means for detecting said output of infrared rays;
demodulating means for demodulating said detected infrared rays;
means for inputting said demodulated signal to said image signal source; and
means for changing a picture attribute of at least one of color, thickness and kind of tones in said image signal source, in accordance with said second modulation type.
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Accused Products
Abstract
A large screen display comprising an image signal source such as a computer, an original image generator, a light-transmission screen, an on-screen pointing-position detecting means, and a light-pen built in an infra-red-ray emitting modulating means, wherein infra-red rays which are modulated by pressing force generated when the light-pen is pressed against the screen by an operator are emitted and the infrared rays are detected and amplified by an infrared-ray detector and demodulated by a demodulating means and then inputted to the image signal source, so that the tone and thickness of each stroke of a figure to be drawn and displayed can be displayed.
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Citations
13 Claims
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1. An input interface apparatus for a large screen display having a light-transmissive screen, a pointing position detecting means on said screen, and an image signal source, comprising:
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(1) light-pen means for emitting infrared rays including pressing force detecting means for detecting the pressure force when a tip of said light-pen means is pressed against said screen first; first modulating means for modulating, with a first type of modulation, the output of infrared rays according to said detected pressing force; switching means switching to a conductive state when the pressing force against said screen exceeds a predetermined value; and second modulating means for further modulating, with a second type of modulation the infrared rays modulated by said first modulating means; (2) infrared ray modulation signal detecting means including; infrared ray detecting means for detecting said output of infrared rays; demodulating means for demodulating said detected infrared rays; means for inputting said demodulated signal to said image signal source; and means for changing a picture attribute of at least one of color, thickness and kind of tones in said image signal source, in accordance with said second modulation type. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An input interface method for a large screen display system having a light-transmissive screen, a pointing position detecting means on said screen, a light-pen for emitting infrared rays, and infrared ray modulation signal detector and an image signal source, comprising the steps of:
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(1) with said light-pen; detecting the pressing force when the tip of said light-pen is pressed against said screen; modulating the output of emitted infrared rays of said light pen with a first type of modulation according to the detected pressing force; and when the pressing force against said screen exceeds a predetermined value, further modulating the infrared rays modulated by said first modulating with a second type of modulation; and (2) with said infrared ray modulation signal detector; detecting the modulated output of emitted infrared rays; demodulating the detected modulated infrared rays; inputting the demodulated infrared rays to said image signal source; and changing a picture attribute of at least one of color, thickness and kind of tones in said image signal source, in accordance with said second modulation.
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8. An input interface apparatus for a large screen display having a light-transmissive screen, a pointing position detector on said screen, and an image signal source, comprising:
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(1) light-pen for emitting infrared rays including; a pressing force detector for detecting a pressing force ashen a tip of said light-pen is pressed against said screen; a first modulator for modulating the output of infrared rays according to said detected pressing force with a first type of modulation; a switch for switching to a conductive state when the pressing force against said screen exceeds a predetermined value; and a second modulator for further modulating the infrared rays modulated by said first modulator with a second type of modulation; (2) an infrared ray modulation signal detector including; an infrared ray detector detecting said emitted infrared rays; a demodulator demodulating said detected infrared rays; a device for inputting said demodulated signal to said image signal source; and circuitry for changing a picture attribute of at least one of color, thickness and kind of tones in said image signal source, in accordance with said second type of modulation. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification