Input-Output Device and Method for Driving the Same
First Claim
1. An input-output device comprising:
- a first light unit including Z light-emitting diodes, wherein Z is a natural number of 3 or more;
a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident;
an X display circuit provided between the first light unit and the second light unit, configured to be supplied with a display selection signal and a display data signal in accordance with the display selection signal, and configured to be set in a display state corresponding to data of the display data signal, wherein X is a natural number; and
Y light detection circuits each provided between the first light unit and the second light unit, configured to be supplied with a light-detection control signal, and configured to generate data corresponding to illuminance of incident light in accordance with the light-detection control signal, wherein Y is a natural number of 2 or more.
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Accused Products
Abstract
To increase the light detection accuracy, a method for driving an input-output device that includes a first light unit, a second light unit, a display circuit, and Y light detection circuits (Y is a natural number of 2 or more) is proposed. The same light-detection control signal is input to the Y light detection circuits. In a frame period set by a display selection signal, the first light unit is lit by sequentially switching Z light-emitting diodes and emitting light, and the second light unit is lit by making the white light-emitting diode emit light when the first light unit is not lit. In a period when the second light unit is lit, Y pieces of data corresponding to the illuminance of light entering the Y light detection circuits are generated.
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Citations
26 Claims
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1. An input-output device comprising:
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a first light unit including Z light-emitting diodes, wherein Z is a natural number of 3 or more; a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident; an X display circuit provided between the first light unit and the second light unit, configured to be supplied with a display selection signal and a display data signal in accordance with the display selection signal, and configured to be set in a display state corresponding to data of the display data signal, wherein X is a natural number; and Y light detection circuits each provided between the first light unit and the second light unit, configured to be supplied with a light-detection control signal, and configured to generate data corresponding to illuminance of incident light in accordance with the light-detection control signal, wherein Y is a natural number of 2 or more. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An input-output device comprising:
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a first light unit including Z light-emitting diodes, wherein Z is a natural number of 3 or more; a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident; an X display circuit provided between the first light unit and the second light unit, wherein X is a natural number; and Y light detection circuits each provided between the first light unit and the second light unit, wherein Y is a natural number of 2 or more. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for driving an input-output device comprising a first light unit including Z light-emitting diodes, wherein Z is a natural number of 3 or more;
- a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident;
an X display circuit provided between the first light unit and the second light unit, configured to be supplied with a display selection signal and a display data signal in accordance with the display selection signal, and configured to be set in a display state corresponding to data of the display data signal, wherein X is a natural number; and
Y light detection circuits each provided between the first light unit and the second light unit, configured to be supplied with a light-detection control signal, and configured to generate data corresponding to illuminance of incident light in accordance with the light-detection control signal, wherein Y is a natural number of 2 or more, the method comprising steps of;inputting the light-detection control signal to each of the Y light detection circuits; in a frame period set by the display selection signal, making the first light unit lit by sequentially switching the Z light-emitting diodes and emitting light, and making the second light unit lit by making the white light-emitting diode emit light when the first light unit is not lit; and generating Y pieces of data corresponding to the illuminance of the incident light in a period when the second light unit is lit. - View Dependent Claims (16, 17, 18, 19, 20)
- a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident;
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21. A method for driving an input-output device comprising a first light unit including Z light-emitting diodes, wherein Z is a natural number of 3 or more;
- a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident;
an X display circuit provided between the first light unit and the second light unit, configured to be supplied with a display selection signal and a display data signal in accordance with the display selection signal, and configured to be set in a display state corresponding to data of the display data signal, wherein X is a natural number; and
Y light detection circuits each provided between the first light unit and the second light unit, configured to be supplied with a light-detection control signal, and configured to generate data corresponding to illuminance of incident light in accordance with the light-detection control signal, wherein Y is a natural number of 2 or more, the method comprising steps of;inputting the light-detection control signal to each of the Y light detection circuits; in a frame period set by the display selection signal, making the first light unit lit by sequentially switching the Z light-emitting diodes and emitting light, and making the second light unit lit by making the white light-emitting diode emit light when the first light unit is not lit; generating Y pieces of first data corresponding to first illuminance of the incident light in a first period when the second light unit is lit; generating Y pieces of second data corresponding to second illuminance of the incident light in a second period when the first light unit and the second light unit are not lit; and generating third data that is data of difference between the first data and the second data. - View Dependent Claims (22, 23, 24, 25, 26)
- a second light unit including a white light-emitting diode and a light guide plate on which light from the white light-emitting diode is incident;
Specification