Patent ID: 9076741
Filing Date: 2015-07-07
Classification: B41J,G03G,H01L

Abstract:
1. A light-emitting element comprising: a light-emitting section and a light-receiving section provided on a substrate, wherein the light-emitting section includes: an anode and a cathode; an organic compound provided between the anode and the cathode, wherein holes injected from the anode and electrons injected from the cathode couple with each other, thereby emitting light; a translucent reflecting portion provided on the anode and making an optical resonance structure with the cathode, the translucent reflecting portion being configured to transmit the light emitted in the organic compound, the light having a spectral radiance that changes with changes in ambient temperature; and a transparent portion provided on the translucent reflecting portion and configured to radiate a first part of the light coming through the translucent reflecting portion to outside and to total-reflect a second part of the light coming through the translucent reflecting portion, the second part of the light being light incident to a boundary surface between the transparent portion and outside at angles larger than a critical angle; and wherein the light-receiving section includes a plurality of light receiving elements, each of the light receiving elements arranged at a unique distance from a location where the light is emitted from the organic compound, and each of the plurality of light receiving elements is configured to receive a respective portion of the light total-reflected at the boundary surface and is configured to output a signal that corresponds to an amount of light that is received by the respective light receiving element, the amount of light received by each of the plurality of light receiving elements changes with changes in wavelength of the light passing through the translucent reflecting portion, and the light receiving section is further configured to output a coefficient having an amplitude level in correlation to a pattern of the signals output by the light receiving elements.