Light-emitting device

A light-emitting device and electroluminescence technology, which are applied in the directions of instruments, electrical components, and electric solid-state devices, etc., can solve the problems of visual brightness differences and differences, and achieve the effect of suppressing brightness changes.
CN102054432AInactive Publication Date: 2011-05-11CANON KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CANON KK
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

A light-emitting device includes a plurality of pixels including an organic electroluminescent element, a drive transistor driving the organic electroluminescent element, and a hold capacitor holding a control signal for controlling the drive transistor, the organic electroluminescent element being electrically connected to one of a source electrode and a drain electrode of the drive transistor. The hold capacitor includes a metal layer, an insulating layer, and a semiconductor layer in this order. The semiconductor layer receives light emitted from the organic electroluminescent element. One of the metal layer and the semiconductor layer of the hold capacitor is electrically connected to a gate electrode of the drive transistor, and the other of the metal layer and the semiconductor layer of the hold capacitor is specified at a fixed potential.
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Description

technical field

[0001] The present invention relates to a light-emitting device having a plurality of organic electroluminescence elements, and particularly to a light-emitting device in which variations in luminance are suppressed. Background technique

[0002] A light-emitting device having a plurality of organic electroluminescent elements has attracted great attention as a self-luminous device that is expected to be thinner and consume less power. The organic electroluminescent element has an organic compound layer between an anode and a cathode, and emits light using energy generated when electrons and holes respectively injected into the organic compound layer from the cathode and anode are recombined.

[0003] It is known that an organic electroluminescence element exhibits deterioration such as a reduction in luminance as driving time elapses so that the driving voltage is increased. Since this degradation differs from organic electroluminescent element to organic e...

Claims

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