LIGHT-EMITTING APPARATUS, OPTICAL MEASURING INSTRUMENT, IMAGE FORMING APPARATUS, AND LIGHT-EMITTING DEVICE
A light-emitting apparatus includes plural first transfer elements, plural second transfer elements, plural first driving elements, plural setting elements, plural second driving elements, and plural light-emitting elements. The plural first transfer elements enter an ON state in order. The plural second transfer elements enter the ON state in order. The plural first driving elements are connected to the plural first transfer elements and are shifted to a state in which the plural first driving elements are able to be shifted to the ON state when the first transfer elements enter the ON state. The plural setting elements are connected to the plural second transfer elements and are shifted to a state in which the plural setting elements are able to be shifted to the ON state when the second transfer elements enter the ON state. The plural second driving elements are connected to the plural setting elements and are shifted to a state in which the plural second driving elements are able to be shifted to the ON state when the setting elements enter the ON state. The plural light-emitting elements are connected to the plural first driving elements and the plural second driving elements and emit light or increase light emission intensity when the first driving elements and the second driving elements enter the ON state. Plural sets each including one of the first driving elements, one of the second driving elements, and one of the light-emitting elements are connected to at least one of the plural setting elements. The plural light-emitting elements are arranged two-dimensionally.
1 . A light-emitting apparatus comprising:
a plurality of first transfer elements that enter an ON state in order;
a plurality of second transfer elements that enter the ON state in order;
a plurality of first driving elements that are connected to the plurality of first transfer elements and are shifted to a state in which the plurality of first driving elements are able to be shifted to the ON state, when the first transfer elements enter the ON state;
a plurality of setting elements that are connected to the plurality of second transfer elements and are shifted to a state in which the plurality of setting elements are able to be shifted to the ON state, when the second transfer elements enter the ON state;
a plurality of second driving elements that are connected to the plurality of setting elements and are shifted to a state in which the plurality of second driving elements are able to be shifted to the ON state, when the setting elements enter the ON state; and
a plurality of light-emitting elements that are connected to the plurality of first driving elements and the plurality of second driving elements and emit light or increase light emission intensity when the first driving elements and the second driving elements enter the ON state,
wherein a plurality of sets each including one of the first driving elements, one of the second driving elements, and one of the light-emitting elements are connected to at least one of the plurality of setting elements, and the plurality of light-emitting elements are arranged two-dimensionally.
2 . The light-emitting apparatus according to claim 1 , wherein a plurality of sets each including one of the first driving elements, one of the second driving elements, and one of the light-emitting elements are connected to each of the plurality of setting elements.
3 . The light-emitting apparatus according to claim 1 , wherein the first driving element, the second driving element, and the light-emitting element in each of the sets are connected in series and arranged such that current for causing the light-emitting element to emit light or increase the light emission intensity flows via the first driving element and the second driving element that have been shifted from an OFF state to the ON state.
4 . The light-emitting apparatus according to claim 3 , further comprising:
an ON electrode that is arranged to be shared among the sets each including the first driving element, the second driving element, and the light-emitting element that are connected in series,
wherein the current for causing the light-emitting element to emit light or increase the light emission intensity is supplied from the ON electrode.
5 . The light-emitting apparatus according to claim 3 , wherein the first driving element, the second driving element, and the light-emitting element are laminated and connected in series.
6 . The light-emitting apparatus according to claim 5 , further comprising:
a reference electrode that supplies reference potential; and
an ON electrode that supplies current for causing the light-emitting element to emit light or increase the light emission intensity,
wherein the first driving element, the second driving element, and the light-emitting element are laminated in an order of the first driving element, the second driving element, and the light-emitting element, the reference electrode is connected on a side of the light-emitting element, and the ON electrode is connected on a side of the first driving element.
7 . The light-emitting apparatus according to claim 1 , further comprising a controller that performs control such that the plurality of light-emitting elements that are arranged two-dimensionally maintain the ON state in a parallel manner.
8 . The light-emitting apparatus according to claim 7 , wherein the controller performs control such that ON-target light-emitting elements, out of the plurality of light-emitting elements that are arranged two-dimensionally, are turned on sequentially and such that after sequential tuning on is completed, the plurality of light-emitting elements that have been sequentially turned on maintain the ON state in the parallel manner.
9 . The light-emitting apparatus according to claim 7 ,
wherein the controller performs control such that during a first period, ON-target light-emitting elements, out of a plurality of light-emitting elements that are connected to first transfer elements in the ON state, out of the plurality of first transfer elements, are turned on sequentially by the plurality of second transfer elements,
wherein the controller performs control such that during a second period subsequent to the first period, ON-target light-emitting elements, out of a plurality of light-emitting elements that are connected to first transfer elements that are turned on next, out of the plurality of first transfer elements, are turned on sequentially by the plurality of second transfer elements, and
wherein the controller performs control such that during a third period subsequent to the second period, the plurality of light-emitting elements that are turned on during the first period and the second period maintain the ON state in the parallel manner.
10 . The light-emitting apparatus according to claim 9 , wherein the controller performs control such that the third period is longer than the first period.
11 . The light-emitting apparatus according to claim 1 ,
wherein the plurality of driving elements are thyristors each including a first gate terminal,
wherein the plurality of second driving elements are thyristors each including a second gate terminal,
wherein the plurality of first driving elements are connected to the plurality of first transfer elements via the first gate terminals, and
wherein the plurality of second driving elements are connected to the plurality of setting elements via the second gate terminals.
12 . An optical measuring instrument comprising:
the light-emitting apparatus according to claim 1 ;
a light-receiving unit that receives reflected light from a target irradiated with light by the light-emitting apparatus; and
a processing unit that processes information regarding the light received by the light-receiving unit and measures a distance from the light-emitting apparatus to the target or a shape of the target.
13 . An image forming apparatus comprising:
the light-emitting apparatus according to claim 1 ; and
a driving controller that receives input of an image signal and drives the light-emitting apparatus in accordance with the image signal such that a two-dimensional image is formed by light emitted from the light-emitting apparatus.
14 . A light-emitting device comprising:
a first thyristor that includes a first gate;
a second thyristor that includes a second gate; and
a light-emitting element,
wherein the first thyristor, the second thyristor, and the light-emitting element are laminated and connected in series.
15 . The light-emitting device according to claim 14 , wherein when a predetermined voltage is applied to a multilayer body including the first thyristor, the second thyristor, and the light-emitting element that are laminated, and the first thyristor and the second thyristor are shifted from the OFF state to the ON state in accordance with a control signal input to each of the first gate of the first thyristor and the second gate of the second thyristor, the light-emitting element emits light or increases the light emission intensity.
16 . The light-emitting device according to claim 15 , wherein the first thyristor and the second thyristor are laminated so as to be connected in the multilayer body.