Electroluminescence display device

Patent metadata

Field	Value
Publication number	US-9257491-B2
Application number	US-201514683628-A
Country	US
Kind code	B2
Filing date	Apr 10, 2015
Priority date	Oct 23, 2012
Publication date	Feb 9, 2016
Grant date	Feb 9, 2016

Abstract

There is provided an EL display device of a color filter system which obtains sufficient brightness and contrast while making it difficult to generate a color mixture even if pixels become fine. An EL display device 100 according to the present invention includes a first substrate 1 , a circuit layer 2 formed on the first substrate 1 , a color selection reflection layer 11 formed in an upper layer of the circuit layer 2 , lower electrodes 5 formed in an upper layer of the color selection reflection layer 11 , a white light emission EL layer 7 formed in an upper layer of the lower electrodes 5 , an upper electrode 8 formed in an upper layer of the EL layer 7 , and a sealing layer 9 formed in an upper layer of the upper electrode 8.

First claim

What is claimed is:

1. An EL display device comprising:
a first substrate; and
a plurality of pixels formed on the first substrate, each of the pixels including a circuit layer, a lower electrode, a light emission EL layer, an upper electrode, a reflection layer, a color filter and a sealing layer;
wherein the circuit layer is formed on the first substrate;
the lower electrode which functions as an anode is formed on the circuit layer;
the upper electrode is formed on the lower electrode;
the light emission EL layer is arranged between the lower electrode and the upper electrode;
the reflection layer is arranged between the circuit layer and the lower electrode;
the color filter is arranged between the reflection layer and the lower electrode; and
a sealing layer is formed on the upper electrode to cover the plurality of pixels.

2. The EL display device according to claim 1 , further comprising:
an upper color filters arranged on the sealing layer; and
a second substrate having the upper color filters formed on a surface thereof.

3. The EL display device according to claim 1 , further comprising:
a light absorbing layer formed on a lower layer of a color selection reflection layer.

4. The EL display device according to claim 1 , further comprising:
a first protective layer formed between a color filters and the lower electrodes.

5. The EL display device according to claim 1 , further comprising:
a second protective layer formed between the sealing layer and an upper color filters.

Assignees

• Japan Display Inc

Inventors

• Sato Toshihiro
• Toyoda Hironori
• Fujiyoshi Jun

Classifications

• H10K2102/3026

  Top emission · CPC title

• H10K59/32

  Stacked devices having two or more layers, each emitting at different wavelengths · CPC title

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8052

  Cathodes · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title