IP Library › Granted Patent US 12,648,339
Granted Patent B2
US 12,648,339 · App. 18/286,193 · Granted Jun 2, 2026

Display device

Inventors: Tohru Okabe (Kameyama City, JP); Shoji Okazaki (Kameyama City, JP); Shinsuke Saida (Kameyama City, JP); Shinji Ichikawa (Kameyama City, JP); Hiroki Taniyama (Kameyama City, JP); Eiji Fujimoto (Kameyama City, JP)
Assignee: Sharp Display Technology Corporation
H10K59/8731H10K50/00H10K59/00H10K59/131H10K59/40H10K59/8722H10K59/8723H10K59/873
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Quick Facts
Patent No.
US 12,648,339
App. No.
18/286,193
Granted
Jun 2, 2026
Kind
B2
Abstract

An organic EL display device has a picture-frame region provided with: dam walls extending along an outer periphery of a display region to block an organic sealing layer; and a second lead wire running from toward the display region, crossing the dam walls, and extending out of the picture-frame region. The picture-frame region includes a spacer wall extending along the dam wall and provided to an outer periphery of a portion, of the dam wall, intersecting at least with the second lead wire. The spacer wall has an upper portion provided with a plurality of protruding portions at intervals along the spacer wall. The second lead wire extends to cross a portion of, the spacer wall, away from the protruding portions.

Claims (28)

1 . A display device, comprising: a substrate layer; a light-emitting element layer supported by the substrate layer and including a plurality of light-emitting elements; a sealing film provided above the light-emitting element layer and covering the plurality of light-emitting elements; and a display region configured to display an image using light emitted from the light-emitting elements, and a picture-frame region provided outside the display region, wherein the sealing film includes an organic sealing layer provided to the display region, the picture-frame region includes: a wall body extending along an outer periphery of the display region; and a wire running from the display region, crossing the wall body, and extending out of the picture-frame region, the wall body includes: a dam wall that keeps an organic material, forming the organic sealing layer, from spreading out of the picture-frame region; and a spacer wall extending in an outer periphery of the dam wall along a portion, of the dam wall, intersecting at least with the wire, the spacer wall has an upper portion provided with a plurality of protruding portions extending in a height direction of the spacer wall at intervals along the dam wall, and the wire extends to cross a portion, of the spacer wall, away from the protruding portions.

2 . The display device according to claim 1 ,

wherein the spacer wall has the portion away from the protruding portion, and a height of the portion is smaller than a height of the dam wall.

3 . The display device according to claim 1 - or 2 ,

wherein each of the dam wall and the spacer wall includes: a lower wall layer; and an upper wall layer provided above the lower wall layer, and

each of the protruding portions is the upper wall layer of the spacer wall.

4 . The display device according to claim 3 , further comprising

a thin-film transistor layer provided between the substrate layer and the light-emitting element layer, and including a plurality of thin-film transistors,

wherein the thin-film transistor layer includes a planarization film provided to cover the plurality of thin-film transistors,

the light-emitting element layer includes: a plurality of pixel electrodes; and an edge cover provided to partition the pixel electrodes,

the lower wall layer is formed of a same material as, and in a same layer as, the planarization film, and

the upper wall layer is formed of a same material as, and in a same layer as, the edge cover.

5 . The display device according to claim 3 , further comprising

a thin-film transistor layer provided between the substrate layer and the light-emitting element layer, and including a plurality of thin-film transistors,

wherein the thin-film transistor layer includes: a first planarization film provided to cover the plurality of thin-film transistors; a conductive layer provided on the first planarization film; and a second planarization film provided on the conductive layer,

the light-emitting element layer includes: a plurality of pixel electrodes; and an edge cover provided to partition the pixel electrodes,

the lower wall layer is formed of a same material as, and in a same layer as, the second planarization film, and

the upper wall layer is formed of a same material as, and in a same layer as, the edge cover.

6 . The display device according to claim 1 ,

wherein the spacer dam wall extends along an entire outer periphery of the dam wall.

7 . The display device according to claim 1 ,

wherein the spacer wall is provided only in a portion forming a side, of the picture-frame region, at which the dam wall and the wire intersect with each other.

8 . The display device according to claim 1 , further comprising

a touch panel provided on the sealing film,

wherein the touch panel includes a plurality of detecting electrodes provided in a touch region set to overlap with the display region, and

the wire is a lead wire included in the touch panel and led from the detecting electrodes to the picture-frame region.

9 . The display device according to claim 1 ,

wherein the light-emitting elements are organic electroluminescence elements.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 9, 2023
From: OKABE, TOHRU; OKAZAKI, SHOJI; SAIDA, SHINSUKE; ICHIKAWA, SHINJI; TANIYAMA, HIROKI; FUJIMOTO, EIJI
To: SHARP DISPLAY TECHNOLOGY CORPORATION
Reel/Frame 065163/0674 →
Continuity (1)
Related Publication 20240381743A1 · Nov 14, 2024
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