Fluorescence conversion medium and display device comprising it

• US 6,641,755 B2
• Filed: 07/29/2002
• Issued: 11/04/2003
• Est. Priority Date: 11/20/1998
• Status: Expired due to Term

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Ishikawa, Motoharu, Eida, Mitsuru, Tomoike, Kazuhiro
• Primary Examiner(s): KOSLOW, CAROL M
• Application Number:
  US10/206,237
• Publication Number:
  US 20030015689A1
• Time in Patent Office: 463 Days
• Field of Search: 252/301.35, 428/690, 313/501
• US Class Current: 252/301.35
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]

Abstract

Provided are a fluorescence conversion medium which comprises at least a fluorescent coloring matter and a binder resin and which can absorb light from a light emitter and can emit visible fluorescence, wherein fine particles containing the fluorescent coloring matter are dispersed in the binder resin; and a display device that comprises a light emitter and the fluorescence conversion medium. The fluorescence conversion medium (including fluorescence conversion films) has the advantages of stable fluorescence conversion capability, good heat resistance and good light resistance and favorable to high-resolution multi-color image display; and the display device comprises the fluorescence conversion medium.

Claims

1. A fluorescence conversion medium comprising fine particles containing a fluorescent coloring matter dispersed in a binder resin, the fluorescent conversion medium being capable of absorbing light from a light emitter to emit visible fluorescence, wherein fine particles having a particle size of at most 500 nm account for at least 80% by weight of all the fluorescent coloring matter-containing fine particles.