Light emitting device

Patent metadata

Field	Value
Publication number	US-8975813-B2
Application number	US-201213616035-A
Country	US
Kind code	B2
Filing date	Sep 14, 2012
Priority date	Aug 28, 2000
Publication date	Mar 10, 2015
Grant date	Mar 10, 2015

Abstract

The luminance of different colors of light emitted from EL elements in a pixel portion of a light emitting device is equalized and the luminance of light emitted from the EL elements is raised. The pixel portion of the light emitting device has EL elements whose EL layers contain triplet compounds and EL elements whose EL layers contain singlet compounds in combination. The luminance of light emitted from the plural EL elements is thus equalized. Furthermore, a hole transporting layer has a laminate structure to thereby cause the EL elements to emit light of higher luminance.

First claim

What is claimed is:

1. A display device comprising:
a first substrate;
a first pixel over the first substrate, the first pixel comprising:
at least six transistors;
a first electroluminescence element comprising:
a first electrode; and
a second electrode over the first electrode; and

a layer over the second electrode, the layer comprising carbon;

a second pixel over the first substrate, the second pixel comprising a second electroluminescence element;
a second su…

Assignees

• Yamazaki Shunpei
• Nishi Takeshi
• Mizukami Mayumi
• Ikeda Hisao
• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Nishi Takeshi
• Mizukami Mayumi
• Ikeda Hisao

Classifications

• Y10S428/917

  Cross-Sectional Technologies · mapped topic

• H10K59/12

  Electricity · mapped topic

• H10K59/35 Primary

  Electricity · mapped topic

• H01L27/3211

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic