Light-emitting array, light-emitting device, measurement apparatus, and method for manufacturing light-emitting array
A light-emitting array includes a light-emitting part having plural light-emitting block, a selection part that operates with a reference potential supplied from a reference part provided on an outside as a reference and selects the light-emitting block to be made to emit light, and a disconnection part that disconnects connection of the selection part and the reference part in a period during which a light emission current caused by low-side drive is flowing in the light-emitting block.
1 . A light-emitting array comprising:
a light-emitting part having a plurality of light-emitting blocks;
a selection part that comprises a plurality of shift thyristors and operates with a reference potential supplied from a reference part which is connected to the reference potential which is ground potential and is provided on an outside as a reference and selects the light-emitting block to be made to emit light; and
a disconnection part that includes a first thyristor disconnects connection of the selection part and the reference part in a period during which a light emission current caused by low-side drive is flowing in the light-emitting block.
2 . The light-emitting array according to claim 1 ,
wherein the disconnection part further includes a resistor, and the first thyristor transits from on to off to disconnect the connection.
3 . The light-emitting array according to claim 2 ,
wherein the selection part further includes a plurality of second thyristors to which an on state is transferred, and
the second thyristors and the first thyristor have a common semiconductor layer.
4 . The light-emitting array according to claim 2 ,
wherein the first thyristor is configured with a semiconductor layer, a region of a two-layered semiconductor layer having a different polarity on the semiconductor layer, and a region of a one-layered semiconductor layer having a different polarity on the semiconductor layer.
5 . The light-emitting array according to claim 1 ,
wherein the disconnection part transits from on to off to disconnect the connection in a case where a light emission current caused by low-side drive flows in the light-emitting block.
6 . A light-emitting device comprising:
the light-emitting array according to claim 1 ; and
a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.
7 . A light-emitting device comprising:
the light-emitting array according to claim 2 ; and
a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.
8 . A light-emitting device comprising:
the light-emitting array according to claim 3 ; and
a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.
9 . A light-emitting device comprising:
the light-emitting array according to claim 4 ; and
a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.
10 . A light-emitting device comprising:
the light-emitting array according to claim 5 ; and
a drive unit that includes a transistor and is turned on to make a light emission current flow in the light-emitting part of the light-emitting array by low-side drive to drive the light-emitting part of the light-emitting array.
11 . A measurement apparatus comprising:
the light-emitting device according to claim 6 ; and
a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,
wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.
12 . A measurement apparatus comprising:
the light-emitting device according to claim 7 ; and
a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,
wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.
13 . A measurement apparatus comprising:
the light-emitting device according to claim 8 ; and
a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,
wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.
14 . A measurement apparatus comprising:
the light-emitting device according to claim 9 ; and
a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,
wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.
15 . A measurement apparatus comprising:
the light-emitting device according to claim 10 ; and
a light-receiving unit that receives light emitted from the light-emitting part of the light-emitting device and reflected by an object to be measured,
wherein the measurement apparatus measures a three-dimensional shape of the object to be measured.
16 . A method for manufacturing a light-emitting array, the method comprising:
laminating a first semiconductor layer laminate in which a light-emitting element is configured, on a substrate;
laminating a second semiconductor layer laminate in which a thyristor is configured, on the first semiconductor layer laminate;
processing the second semiconductor layer laminate and the first semiconductor layer laminate to separate a light-emitting block including the light-emitting element, and a disconnection part that disconnects connection of a selection part that comprises a plurality of shift thyristors and selects the light-emitting block to be made to emit light and a reference part that is connected to ground potential and is provided on an outside and supplies a reference potential which is the ground potential; and
processing the second semiconductor layer laminate to form a first thyristor included in the disconnection part which includes a first thyristor and a second thyristor included in the selection part.