The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2026
Filed:
Oct. 05, 2021
Toray Industries, Inc., Tokyo, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
Problems have been presented in terms of the step flatness of cured films used, inter alia, as wiring-insulating insulation films or protective films formed so as to cover metal wirings or light-emitting elements such as LEDs. The present invention overcomes problems relating to the incidence of wiring defects such as short-circuiting and defects associated with light-emitting element connection, and problems relating to the light-emission fault rate when this display device has been produced. The present invention is a display device having at least a metal wiring, a cured film, and a plurality of light-emitting elements, wherein a pair of electrode terminals are provided on one surface of each of the light-emitting elements. The pair of electrode terminals are connected to a plurality of the metal wirings extending in the cured film. The metal wirings are configured so that electrical insulation properties are maintained by the cured film. The metal wirings have a plurality of metal wirings (K1) extending in the thickness direction of the cured film, and a plurality of metal wirings (K2) that are connected to the metal wiring (K1) and that extend in a planar direction perpendicular to the thickness direction of the cured film. The cured film is obtained by curing a resin composition containing resin (A) and has a cured film that is in contact with some of the surfaces of the metal wirings (K2). The display device has at least a region (G) in which the line spacing H1 between two of the metal wirings (K2) that are adjacent to one another is 1-20 μm. In the region (G), the ratio H3/H2 is 1.4-4.0, and the step flattening rate P (%) expressed by (Formula 1) is 70-99%, where H2 (μm) is the thickness of the metal wirings (K2), H3 (μm) is the thickness of the cured film, and H4 (μm) is the depth of a step in the cured film that was formed in the region (G). (Formula 1) P (%)=(1−(H4/H2))×100.