ELECTRONIC DEVICE WITH TOUCH INPUT FUNCTION
First Claim
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1. An electronic device with touch input function, comprising:
- a display unit defining an information display area;
an touch input device comprising;
a circuit board defining an opening area which has a same size and shape as the information display area;
a sheet of glass, with surface coating, positioned on the circuit board;
at least two light emitting devices positioned around the edges of the sheet of glass on the circuit board, configured for emitting monochromatic light;
at least two light detecting devices corresponding to the at least two light emitting devices positioned around the edges of the sheet of glass on the circuit board, configured for detecting the monochromatic light emitted by the light emitting device, wherein the monochromatic light emitted from one of the light emitting devices is detected by one light detecting device, each of the light detecting devices only detects the monochromatic light emitted from one light emitting device, the monochromatic light transmitted between one of the light emitting devices and corresponding light detecting device forms a light path;
a micro-processing unit configured for controlling the at least two light emitting devices to emit monochromatic light to have a total internal reflection in the sheet of glass, detecting two intersected obstructed light paths by the at least two light detecting devices, sending information of the two intersected obstructed light paths to a central processing unit (CPU); and
the CPU configured for determining a position of a touch operation according to the information of the two intersected obstructed light paths.
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Abstract
A method for controlling an electronic device with touch input function includes controlling at least two light emitting devices to emit monochromatic light to have a total internal reflection in a sheet of glass. Detecting two intersected light paths obstructed by at least two light detecting devices; sending information of the two intersected obstructed light paths to a central processing unit (CPU); and the CPU determining a position of a touch operation according to information of the two intersected obstructed light paths. An electronic device with touch input function is also provided.
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Citations
15 Claims
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1. An electronic device with touch input function, comprising:
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a display unit defining an information display area; an touch input device comprising; a circuit board defining an opening area which has a same size and shape as the information display area; a sheet of glass, with surface coating, positioned on the circuit board; at least two light emitting devices positioned around the edges of the sheet of glass on the circuit board, configured for emitting monochromatic light; at least two light detecting devices corresponding to the at least two light emitting devices positioned around the edges of the sheet of glass on the circuit board, configured for detecting the monochromatic light emitted by the light emitting device, wherein the monochromatic light emitted from one of the light emitting devices is detected by one light detecting device, each of the light detecting devices only detects the monochromatic light emitted from one light emitting device, the monochromatic light transmitted between one of the light emitting devices and corresponding light detecting device forms a light path; a micro-processing unit configured for controlling the at least two light emitting devices to emit monochromatic light to have a total internal reflection in the sheet of glass, detecting two intersected obstructed light paths by the at least two light detecting devices, sending information of the two intersected obstructed light paths to a central processing unit (CPU); and the CPU configured for determining a position of a touch operation according to the information of the two intersected obstructed light paths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling an electronic device with touch input function, comprising:
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controlling at least two light emitting devices to emit monochromatic light to have a total internal reflection in a sheet of glass; detecting two intersected light paths obstructed by at least two light detecting devices; sending information of the two intersected obstructed light paths to a central processing unit (CPU); and the CPU determining a position of a touch operation according to information of the two intersected obstructed light paths. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification