Light-emitting device and method for the production of light-emitting device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTakafumi HAMANO, Shinya YAMAMOTO, Hiroshi SHIROUZU
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Abstract
The invention concerns a light-emitting device comprising an electroluminescent element as a light source and a light-detecting element disposed superimposed on the electroluminescent element for detecting the quantity of light emitted by the electroluminescent element to generate an electric signal for use in the correction of the quantity of light emitted, wherein the light-detecting element has a semiconductor island region AR formed larger than a light-projecting region ALE and the thickness of the light-emitting layer in the light-projecting region ALE is uniform.
Claims20
A light-emitting device, comprising:
- a light-emitting element;
- and
- a light-detecting element for detecting light emitted by the light-emitting element laminated on a substrate;
- wherein the light-emitting element has a light-projecting region provided on a flat surface thereof.
A method for the production of a light-emitting element comprising at least the following steps:
- i) A step of forming a light-detecting element having an island-shaped semiconductor region on a substrate;
- and
- ii) A step of forming a light-emitting element superimposed on the semiconductor region on the top of a flat portion of the semiconductor region, wherein the step ii) comprises the following steps:
- a) A step of forming a driving electrode of the light-emitting element covering the entire part of the island-shaped semiconductor region;
- b) A step of covering a part of the driving electrode by an insulating film and forming an opening at least inside the flat portion to define a light-emitting region;
- c) A step of spreading a luminescent material over a portion including at least the opening to form a light-emitting layer;
- and
- d) A step of forming other electrode made of a metal as a main material on the spread of the luminescent material such that the light-emitting layer is interposed between the other electrode and the driving electrode to form the light-emitting element.
Dependencies are inferred from the claim text.