Light-emitting component having light-absorbing layer, light-emitting device, and image forming apparatus
AssigneeFUJIFILM Business Innovation Corp.
InventorTakashi Kondo
Life of this patent
Estimating the term…
Abstract
A light-emitting component includes a light-emitting element, a driving thyristor, and a light-absorbing layer. The light-emitting element emits light of a predetermined wavelength. The driving thyristor causes the light-emitting element to emit light or causes an amount of light emitted by the light-emitting element to increase, upon entering an on-state. The light-absorbing layer is disposed between the light-emitting element and the driving thyristor such that the light-emitting element and the driving thyristor are stacked, and absorbs light emitted by the driving thyristor.
Claims19
A light-emitting component comprising:
- a light-emitting element having at least two layers and configured to emit light of a predetermined wavelength;
- a driving thyristor having at least four layers and configured to cause the light-emitting element to emit light or to cause an amount of light emitted by the light-emitting element to increase, upon entering an on-state;
- and
- a light-absorbing layer that is disposed between the light-emitting element and the driving thyristor and that absorbs light emitted by the driving thyristor,
- wherein the light-emitting element, the driving thyristor, and the light-absorbing layer are stacked on a substrate in a direction perpendicular to the substrate.
A light-emitting component comprising:
- a light-emitting element that emits light of a predetermined wavelength;
- a driving thyristor that causes the light-emitting element to emit light or that causes an amount of light emitted by the light-emitting element to increase, upon entering an on-state;
- and
- a light-absorbing layer that is disposed between the light-emitting element and the driving thyristor such that the light-emitting element and the driving thyristor are stacked and that absorbs light emitted by the driving thyristor, wherein
- each of the light-emitting element and the driving thyristor includes a plurality of semiconductor layers that are stacked, and
- the light-absorbing layer includes a semiconductor layer having a conductivity type identical to a conductivity type of one of a light-emitting-element-side semiconductor layer that is in contact with the light-absorbing layer among the plurality of semiconductor layers of the light-emitting element and a driving-thyristor-side semiconductor layer that is in contact with the light-absorbing layer among the plurality of semiconductor layers of the driving thyristor, and having an impurity concentration that is higher than an impurity concentration of the one of the light-emitting-element-side semiconductor layer and the driving-thyristor-side semiconductor layer.
Dependencies are inferred from the claim text.