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US 10,242,244 B2Granted
Fingerprint detection device and display device
AssigneeJapan Display Inc.
InventorsHayato Kurasawa, Toshinori Uehara, Hiroshi Mizuhashi
Life of this patent
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Abstract
A fingerprint detection device includes: a substrate having a first surface and a second surface on an opposite side of the first surface, the first surface serving as a detection surface configured to detect unevenness of an object in contact or in proximity; a detection electrode provided on the second surface side of the substrate and configured to detect unevenness of a finger in contact or in proximity on the basis of an electrostatic capacitance change; and a drive circuit provided on the second surface side of the substrate and configured to supply a drive signal to the detection electrode.
Claims16
A fingerprint detection device, comprising:
- a substrate having a first surface and a second surface on an opposite side of the first surface, the first surface serving as a detection surface configured to detect unevenness of an object in contact or in proximity;
- a detection electrode provided on the second surface side of the substrate and configured to detect unevenness of a finger in contact or in proximity on the basis of an electrostatic capacitance change;
- a drive circuit provided on the second surface side of the substrate and configured to supply a drive signal to the detection electrode;
- a switching element provided at a position corresponding to the detection electrode;
- a gate line configured to supply a scanning signal to the switching element;
- and
- a first wire having conductivity, the first wire being supplied with a signal synchronized with the drive signal, wherein
- in a first direction perpendicular to the second surface, a distance from the detection electrode to the second surface is no more than a distance from the gate line to the second surface, and is shorter than a distance from the switching element to the second surface,
- the gate line extends in a second direction along one side of the detection electrode, the first wire extends in the second direction and is disposed between the detection electrode and the gate line in a third direction crossing the second direction, and in the first direction, the distance from the detection electrode to the second surface is no more than a distance from the first wire to the second surface.
6 more elements
A display device, comprising:
- a first substrate having a first surface and a second surface on an opposite side of the first surface, the second surface serving as a detection surface configured to detect unevenness of an object in contact or in proximity;
- a second substrate having a display surface, in which a surface on an opposite side of the display surface is opposed to the first surface of the first substrate;
- a detection electrode provided on the first surface side of the first substrate and configured to detect unevenness of a finger in contact or in proximity with the second surface;
- a switching element provided at a position corresponding to the detection electrode;
- a gate line configured to supply a scanning signal to the switching element;
- a display function layer provided between the first substrate and the second substrate at a position farther away from the first surface than the detection electrode is, the display function layer being configured to form an image to be displayed on the display surface;
- and
- a first wire having conductivity, the first wire being supplied with a signal synchronized with the drive signal, wherein
- in a direction perpendicular to the second surface, a distance from the detection electrode to the second surface is no more than a distance from the gate line to the second surface, and is shorter than a distance from the switching element to the second surface, the gate line extends in a second direction along one side of the detection electrode, the first wire extends in the second direction and is disposed between the detection electrode and the gate line in a third direction crossing the second direction, and in the direction, the distance from the detection electrode to the second surface is no more than a distance from the first wire to the second surface.
6 more elements
A fingerprint detection device, comprising:
- a substrate having a first surface and a second surface on an opposite side of the first surface;
- a first detection electrode provided on the first surface side of the substrate and configured to detect unevenness of a finger in contact or in proximity with the second surface;
- a second detection electrode provided on the first surface side of the substrate at a position farther away from the first surface than the first detection electrode is, and configured to detect unevenness of a finger in contact or in proximity on the first surface side;
- a first detection switching element provided at a position corresponding to the first detection electrode;
- a first detection gate line configured to supply a scanning signal to the first detection switching element;
- and
- a first wire having conductivity, the first wire being supplied with a signal synchronized with the drive signal, wherein
- in a first direction perpendicular to the second surface, a distance from the first detection electrode to the second surface is no more than a distance from the first detection gate line to the second surface, and is shorter than a distance from the first detection switching element to the second surface,
- the gate line extends in a second direction along one side of the detection electrode, the first wire extends in the second direction and is disposed between the detection electrode and the gate line in a third direction crossing the second direction, and in the first direction, the distance from the detection electrode to the second surface is no more than a distance from the first wire to the second surface.
6 more elements
Dependencies are inferred from the claim text.