Color emission device

US7233104B2 · kind B2 · utility

Assignee

• IDEMITSU KOSAN CO., LTD. · JP

Inventors

• Hitoshi Kuma · Sodegaura, JP
• Mitsuru Eida · Sodegaura, JP
• Chishio Hosokawa · Sodegaura, JP
• Kenichi Fukuoka · Sodegaura, JP

Key dates

• Filing date: Mar 7, 2003
• Grant date: Jun 19, 2007
• Expiry date: Jul 30, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K59/173

Abstract

An organic EL element (200) emits light containing a blue component (B) and a component (θ) with a peak in 500 to 600 nm. A red converting member (360) has an excitation spectrum with a peak in 500 to 600 nm. The red converting member receives light from the organic EL element (200) and converts the blue component (B) to a red component (R). At this time, the luminance of the red component (R) is enhanced since the member (360) is strongly excited by the component (θ). As a result, the white balance of three colors is improved. Therefore a color emission device (100) can be provided where the intensity of red light is enhanced.