Large touch-sensitive area with time-controlled and location-controlled emitter and receiver modules
First Claim
1. A touch-sensitive region on a display device for detecting a user input, comprising:
- emitter diodes for outputting light;
receiver diodes/phototransistors for detecting the light, the emitter diodes and receiver diodes/phototransistors being arranged in vertical and horizontal emitter and receiver units set opposite to each other, one of the emitter diodes and one of the receiver diodes/phototransistors being optically set in a direct paired relationship to each other; and
a central module;
wherein the detection of a user input is realized through continuously repeating time-sequenced and position-sequenced on-and-off switching of individual emitter diodes and receiver diodes/phototransistors;
wherein one of the emitter diodes and one of the receiver diodes/phototransistors are controlled in pairs; and
wherein for evaluating and increasing the resolution, the signals of the emitter diodes are referenced, adjacent to the emitter diodes, and all electrical signals of the receiver diodes/phototransistors are assembled into the central module, and also the emitter diodes are controlled from the Central module, such that the emitter diodes output a plurality of pulses, whose integrative, quantitative evaluation is a measure of the position of the interruption of a light barrier during an evaluation period and provides information on the position of the interruption relative to the emitter diodes.
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Abstract
The invention enables the realization of an optical and electronic structure of a touch-sensitive area on any flat display surface such as a monitor. The optical structure does not require any additional optical components such as lenses. Laser diodes are likewise not required for the operation of a structure of this type. Large distances and, nevertheless, high sensitivity and high resolution of the touch-sensitive area are accomplished by a novel time-control and location-control of both the emitter diodes as well as the receiver diodes or receiver photo-transistors. If still or moving images are displayed on the surface, the invention can be used as a touch screen and can interactively control the display. A central module simulates a computer mouse and a keyboard.
13 Citations
20 Claims
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1. A touch-sensitive region on a display device for detecting a user input, comprising:
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emitter diodes for outputting light;
receiver diodes/phototransistors for detecting the light, the emitter diodes and receiver diodes/phototransistors being arranged in vertical and horizontal emitter and receiver units set opposite to each other, one of the emitter diodes and one of the receiver diodes/phototransistors being optically set in a direct paired relationship to each other; and
a central module;
wherein the detection of a user input is realized through continuously repeating time-sequenced and position-sequenced on-and-off switching of individual emitter diodes and receiver diodes/phototransistors;
wherein one of the emitter diodes and one of the receiver diodes/phototransistors are controlled in pairs; and
wherein for evaluating and increasing the resolution, the signals of the emitter diodes are referenced, adjacent to the emitter diodes, and all electrical signals of the receiver diodes/phototransistors are assembled into the central module, and also the emitter diodes are controlled from the Central module, such that the emitter diodes output a plurality of pulses, whose integrative, quantitative evaluation is a measure of the position of the interruption of a light barrier during an evaluation period and provides information on the position of the interruption relative to the emitter diodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification