Patent ID: 11908229
Assignee: JAPAN DISPLAY INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A biometric authentication device comprising:
a sensor including a first base material, a plurality of photoelectric conversion elements that are arranged in a matrix on the first base material and that output a signal according to an amount of received light, and a first control unit that controls an operation of the photoelectric conversion elements; and
an illumination device including a second base material, a plurality of light emitting elements that are arranged in a matrix on the second base material and that apply light received by the photoelectric conversion elements, and a second control unit that controls an operation of the light emitting elements, wherein
the photoelectric conversion elements and the light emitting elements are divided into a plurality of groups corresponding to each other,
upon lighting the light emitting element at a predetermined position in the groups of the light emitting elements by the second control unit, the first control unit controls the operation of the photoelectric conversion elements so as to acquire a signal from the photoelectric conversion elements at predetermined positions of the groups of the photoelectric conversion elements, the positions corresponding to the lit light emitting element,
the sensor further includes:
a plurality of first gate lines elongating along a first direction, the first gate lines being arranged with a spacing in a second direction intersecting with the first direction,
a plurality of first signal lines elongating along the second direction, the first signal lines being arranged with a spacing in the first direction,
a first gate line drive circuit connected to the first gate lines, and
a first signal line select circuit connected to the first signal lines;

the illumination device further includes:
a plurality of second gate lines elongating along the first direction, the second gate lines being arranged with a spacing in the second direction,
a plurality of second signal lines elongating along the second direction, the second signal lines being arranged with a spacing in the first direction,
a second gate line drive circuit connected to the second gate lines, and
a second signal line select circuit connected to the second signal lines;

the photoelectric conversion elements are provided in a region surrounded by the first gate line and the first signal line,
the light emitting elements are provided in a region surrounded by the second gate line and the second signal line,
the first control unit controls the operation of the photoelectric conversion elements by controlling the operation of the first gate line drive circuit and the first signal line select circuit, and
the second control unit controls the operation of the light emitting elements by controlling the operation of the second gate line drive circuit and the second signal line select circuit.