Fingerprint input devices and electronic devices provided with the same
First Claim
1. A fingerprint input device, comprising:
- an optical device that is brought into intimate contact with a fingerprint surface of a finger;
a light source for illuminating said fingerprint surface;
an image pick-up device for detecting a light reflected from said fingerprint surface and a light scattered in the finger and emitted from the fingerprint surface, the image pick-up device including a plurality of photoelectric conversion elements arranged two-dimensionally on a substrate; and
mode changer means for switching between a first output mode, in which electric signals produced in said plurality of photoelectric conversion elements are output simultaneously, and a second output mode, in which electric signals produced in said plurality of photoelectric conversion elements are output sequentially.
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Accused Products
Abstract
To provide a fingerprint input device including a collected fiber member that is brought into intimate contact with a fingerprint surface of a finger, a planar light source for illuminating said fingerprint surface, and a two-dimensional image sensor for detecting a light reflected from the fingerprint surface and a light scattered in the finger and emitted from the fingerprint surface, the two-dimensional image sensor having a plurality of photoelectric conversion element arranged two-dimensionally on a substrate. The fingerprint input device detects a fingerprint image and a plethysmogram or acceleration plethysmogram by switching between a mode, in which electric signals produced in the plurality of photoelectric conversion elements are output simultaneously, and a mode, in which electric signals produced in the plurality of photoelectric conversion elements are output sequentially. Thus, the fingerprint input device having a simple configuration can detect the fingerprint image or the plethysmogram with high precision.
53 Citations
22 Claims
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1. A fingerprint input device, comprising:
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an optical device that is brought into intimate contact with a fingerprint surface of a finger;
a light source for illuminating said fingerprint surface;
an image pick-up device for detecting a light reflected from said fingerprint surface and a light scattered in the finger and emitted from the fingerprint surface, the image pick-up device including a plurality of photoelectric conversion elements arranged two-dimensionally on a substrate; and
mode changer means for switching between a first output mode, in which electric signals produced in said plurality of photoelectric conversion elements are output simultaneously, and a second output mode, in which electric signals produced in said plurality of photoelectric conversion elements are output sequentially. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A fingerprint input device, comprising:
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an optical device that is brought into intimate contact with a fingerprint surface of a finger;
a light source for illuminating the fingerprint surface of the finger in intimate contact with said optical device;
a fingerprint sensor for detecting a fingerprint image by detecting a light reflected from said fingerprint surface and a light scattered in the finger and emitted from the fingerprint surface, the fingerprint sensor having a transparent part for transmitting light formed at a part thereof;
a light detector for detecting a light having transmitted through said fingerprint sensor, the light detector being disposed below said fingerprint sensor; and
a detecting instrument for detecting a plethysmogram or acceleration plethysmogram based on an output signal of said light detector. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A fingerprint input device, comprising:
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an optical device that is brought into intimate contact with a fingerprint surface of a finger;
a light source for illuminating said fingerprint surface;
an image pick-up device for detecting a light reflected from said fingerprint surface and a light scattered in the finger and emitted from the fingerprint surface, the image pick-up device including a plurality of photoelectric conversion elements arranged two-dimensionally on a substrate;
a first switch of two-input one-output type that is connected between said plurality of photoelectric conversion elements and a vertical driver circuit;
a second switch of one-input two-output type that is connected between said plurality of photoelectric conversion elements and a horizontal driver circuit;
a mode changer for controlling said first and second switches to switch between a first output mode, in which electric signals produced in said plurality of photoelectric conversion elements are output simultaneously, and a second output mode, in which electric signals produced in said plurality of photoelectric conversion elements are output sequentially;
a current integrator connected to one of outputs of said second switch; and
a differential circuit connected to the other of the outputs of said second switch.
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22. A fingerprint input device, comprising:
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an optical device that is brought into intimate contact with a fingerprint surface of a finger;
a light source for illuminating said fingerprint surface;
an image pick-up device for detecting a light reflected from said fingerprint surface and a light scattered in the finger and emitted from the fingerprint surface, the image pick-up device including a plurality of photoelectric conversion elements arranged two-dimensionally on a substrate;
a plurality of vertical driver circuits that drives said plurality of photoelectric conversion elements sequentially in a vertical direction; and
a plurality of horizontal driver circuits that drives said plurality of photoelectric conversion elements sequentially in a horizontal direction;
wherein the vertical driver circuits are separated into at least two vertical driver units and the horizontal driver circuits are separated into at least two horizontal driver units, and wherein predetermined one of the vertical driver units and predetermined one of the horizontal driver units can be activated at the predetermined condition.
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Specification