Transparent electro-conductive film, and AC powder type EL panel and liquid crystal display using the same

• US 5,300,858 A
• Filed: 06/08/1992
• Issued: 04/05/1994
• Est. Priority Date: 03/31/1989
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Nikaido, Masaru
• Primary Examiner(s): O SHEA, SANDRA L
• Application Number:
  US07/895,132
• Time in Patent Office: 666 Days
• Field of Search: 313/503, 313/504, 313/511, 313/512
• US Class Current: 313/503
• CPC Class Codes: C09K 2323/04 Charge transferring layer characterised by chemical composition, i.e. conductive
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H05B 33/28 of translucent electrodes
• CPC Class Codes: Y10T 428/31663 As siloxane, silicone or silane

Abstract

The present invention relates to a transparent electro-conductive film comprising an optical transparent polymer film and a transparent electro-conductive thin film formed on at least one principal surface of the above polymer film. The polymer film contains 1 to 20% by weight of hydrophobic resin particles such as infusible silicone resin particles having an average particle diameter of 0.5 to 10 μm. The hydrophobic resin particles improve moisture permeability and suppress water permeation of the transparent electro-conductive film without any adverse effects on properties such as transparency. Also, a AC powder type EL panel and a liquid crystal display of the present invention have the above transparent electro-conductive films as a transparent electrode and a base thereof. Therefore, lower cost is achieved and a life is made longer.

Claims

1. A AC powder type EL panel comprising;

a back electrode on which a insulating layer is formed,

a transparent electro-conductive film including an optical transparent polymer film containing 1 to 20% by weight of hydrophobic resin particles having an average particle diameter of from 0.5 to 10 μ

m therein and a transparent electrode having a transparent electro-conductive thin film formed on a principal surface of said polymer film and being disposed opposite to said back electrode, and

an emitting layer sandwiched between said back electrode and said transparent electro-conductive film.

2. The AC powder type EL panel according to claim 1 wherein said back electrode and said transparent electro-conductive film each have a desiccant film and a moistureproof package film laminated on the outer surface.

3. The AC powder type EL panel according to claim 1 wherein said hydrophobic resin particles are substantially spherical infusible silicone resin particles.

4. The AC powder type EL panel according to claim 3 wherein said infusible silicone resin particles satisfy the condition that sphericity f shown in the following formula (I) is 0.8 or more:

f=√

A/(π

/4)/D max (I) wherein, A is a sectional area of the polymer powder and D max is length of major axis of section of the polymer powder.

5. The AC powder type EL panel according to claim 1 wherein said polymer film substantially comprises at least one selected from the group consisting of polyethylene terephthalate and polyethersulfone.

6. The AC powder type EL panel according to claim 1 wherein said emitting layer comprises an organic dielectric binder in which phosphor powder and organic fluorescent pigments are dispersed.