Flexible display, method for manufacturing same, and support substrate for flexible display

Patent metadata

Field	Value
Publication number	US-2021217977-A1
Application number	US-202117213136-A
Country	US
Kind code	A1
Filing date	Mar 25, 2021
Priority date	Sep 13, 2017
Publication date	Jul 15, 2021
Grant date	—

Abstract

A flexible display supporting substrate of the present disclosure includes: a glass base (11); a plastic film (12) which has a surface (12s), the surface having a polish recess (12c), the plastic film being supported by the glass base (11); and an oxide layer (20) overlying a part of the surface (12s) of the plastic film (12) and covering at least part of the polish recess (12c).

First claim

1 . A flexible display comprising:
a flexible substrate; an OLED device supported by the flexible substrate, a first gas barrier film that covers the flexible substrate, the first gas barrier film located between the OLED device the flexible substrate; and a second gas barrier film supported by the flexible substrate and covering the OLED device wherein the flexible substrate includes
a plastic film which has a surface, the surface having at least one polish recess, the polish recess comprising a plurality of polish scars including a minute protrusion that has a height of not less than 50 nm and not more than 300 nm and/or a minute recessed portion that has a depth of not less than 50 nm and not more than 300 nm, and
a sintered layer formed selectively on the at least one polish recess to planarize the plurality of polish scars.

2 . The flexible display of claim 1 , wherein the sintered layer has an upper surface flatter than the polish recess in the surface of the plastic film.

3 . The flexible display of claim 1 , wherein the sintered layer has a thickness of not less than 100 nm and not more than 500 nm.

4 . A flexible display supporting substrate comprising:
a glass base; a plastic film which has a surface, the surface having at least one polish recess, the polish recess comprising a plurality of polish scars including a minute protrusion that has a height of not less than 50 nm and not more than 300 nm and/or a minute recessed portion that has a depth of not less than 50 nm and not more than 300 nm, the plastic film being supported by the glass base; and a sintered layer formed selectively on the at least one polish recess to planarize the plurality of polish scars.

5 . The flexible display supporting substrate of claim 4 , wherein sintered layer has an upper surface flatter than the polish recess in the surface of the plastic film.

6 . The flexible display supporting substrate of claim 4 , wherein the sintered layer has a thickness of not less than 100 nm and not more than 500 nm.

7 . The flexible display supporting substrate of claim 4 , comprising a gas barrier film covering the surface of the plastic film and the sintered layer.

Assignees

• Sakai Display Products Corp

Inventors

• Tanaka Kohichi
• Kishimoto Katsuhiko

Classifications

• H10K71/40

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• H10K59/12

  Active-matrix OLED [AMOLED] displays · CPC title

• H10K59/873

  Encapsulations · CPC title

• H05B33/10

  Apparatus or processes specially adapted to the manufacture of electroluminescent light sources · CPC title

• G09F9/30

  in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) · CPC title