SEMICONDUCTOR DEVICE AND DRIVING METHOD OF THE SAME
First Claim
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1. A semiconductor device comprising:
- a display portion comprising a plurality of pixels and a plurality of photosensors;
a first ultrasonic wave transmitter configured to output a first ultrasonic wave;
a second ultrasonic wave transmitter configured to output a second ultrasonic wave;
a first ultrasonic wave receiver configured to detect the first ultrasonic wave reflected by an object;
a second ultrasonic wave receiver configured to detect the second ultrasonic wave reflected by the object;
an arithmetic unit configured to calculate a distance between the display portion and the object based on the first ultrasonic wave and the second ultrasonic wave detected by the first ultrasonic wave receiver and the second ultrasonic wave receiver,wherein the first ultrasonic wave receiver includes a plurality of ultrasonic wave sensors arranged in a first direction, andwherein the second ultrasonic wave receiver includes a plurality of ultrasonic wave sensors arranged in a second direction different from the first direction.
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Abstract
To provide a semiconductor device to which information can be input in low-illuminance conditions or at a location distant from the semiconductor device. An ultrasonic wave sensor is provided in the semiconductor device with a display region having photosensors. An object to be detected is detected by switching the photosensors and the ultrasonic wave sensor in accordance with illuminance around the semiconductor device or a distance between the semiconductor device and the object. The photosensors and the ultrasonic wave sensor can be used concurrently.
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Citations
11 Claims
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1. A semiconductor device comprising:
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a display portion comprising a plurality of pixels and a plurality of photosensors; a first ultrasonic wave transmitter configured to output a first ultrasonic wave; a second ultrasonic wave transmitter configured to output a second ultrasonic wave; a first ultrasonic wave receiver configured to detect the first ultrasonic wave reflected by an object; a second ultrasonic wave receiver configured to detect the second ultrasonic wave reflected by the object; an arithmetic unit configured to calculate a distance between the display portion and the object based on the first ultrasonic wave and the second ultrasonic wave detected by the first ultrasonic wave receiver and the second ultrasonic wave receiver, wherein the first ultrasonic wave receiver includes a plurality of ultrasonic wave sensors arranged in a first direction, and wherein the second ultrasonic wave receiver includes a plurality of ultrasonic wave sensors arranged in a second direction different from the first direction. - View Dependent Claims (2, 3, 4, 5)
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6. A method for driving a semiconductor device,
the semiconductor device comprising: -
a display portion having a photosensor; an ultrasonic wave transmitter; and an ultrasonic wave sensor, and the method comprising steps of; measuring illuminance around the semiconductor device with the photosensor; and identifying a location of an object with any one of the photosensor or the ultrasonic wave sensor, wherein whether the photosensor or the ultrasonic wave sensor is used for identifying the location of the object is determined on the basis of the illuminance. - View Dependent Claims (7, 8)
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9. A method for driving a semiconductor device,
the semiconductor device comprising: -
a display portion having a photosensor; an ultrasonic wave transmitter; and an ultrasonic wave sensor, and the method comprising steps of; measuring a distance from the display portion to an object with the ultrasonic wave sensor; and identifying a location of the object with any one of the photosensor or the ultrasonic wave sensor, wherein whether the photosensor or the ultrasonic wave sensor is used for identifying the location of the object is determined on the basis of the distance. - View Dependent Claims (10, 11)
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Specification