Display device with signal lines being wired in display area and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-12588375-B2
Application number	US-202117922411-A
Country	US
Kind code	B2
Filing date	Jun 8, 2021
Priority date	Jul 7, 2020
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A display device and a method for manufacturing the display device are provided. The display device includes: a driving circuit board provided with a plurality of first connection electrodes on a side thereof; a display module on a side of the driving circuit board, the display module including a flexible substrate, a plurality of signal lines on a side, away from the driving circuit board, of the flexible substrate and a plurality of bottom electrodes on a side, facing the driving circuit board, of the flexible substrate; the flexible substrate being provided with a plurality of first via holes in a display area of the display module, the signal lines are electrically connected with the bottom electrodes through the first via holes, and the bottom electrodes are electrically connected with the first connection electrodes.

First claim

The invention claimed is:

1 . A display device, comprising:
a driving circuit board, a plurality of first connection electrodes being provided at a side of the driving circuit board; a display module on a side of the driving circuit board, the display module comprising a flexible substrate, a plurality of signal lines on a side, away from the driving circuit board, of the flexible substrate and a plurality of bottom electrodes on a side, facing the driving circuit board, of the flexible substrate, wherein the flexible substrate is provided with a plurality of first via holes in a display area of the display module, the signal lines are electrically connected with the bottom electrodes through the first via holes, and the bottom electrodes are electrically connected with the first connection electrodes, wherein the signal lines comprise a plurality of scan signal lines, a plurality of data signal lines, and a plurality of high-level signal lines; the display module comprises a pixel circuit on a side of the flexible substrate away from the driving circuit board; the pixel circuit comprises a first metal layer and a second metal layer, the second metal layer is disposed on a side, away from the flexible substrate, of the first metal layer; the first metal layer comprises the scan signal lines and the high-level signal lines, and the second metal layer comprises the data signal lines, wherein the signal lines further comprises a plurality of low-level signal lines, the low-level signal lines comprise a first low-level signal sub-line in the first metal layer.

2 . The display device according to claim 1 , wherein the low-level signal lines further comprise a second low-level signal sub-line in the second metal layer.

3 . The display device according to claim 2 , wherein at least one first low-level signal sub-line and at least one second low-level signal sub-line are electrically connected.

4 . The display device according to claim 3 , wherein the signal lines further comprise a plurality of sensing signal lines in the second metal layer.

5 . The display device according to claim 4 , wherein the data signal lines comprise a plurality of first data signal lines and a plurality of second data signal lines, and an orthogonal projection of at least one of the sensing signal lines on the flexible substrate is located between orthogonal projections of two adjacent first data signal lines on the flexible substrate; and
orthographic projections of the bottom electrodes in at least one row on the flexible substrate are between orthographic projections of two adjacent second data signal lines on the flexible substrate, wherein any two first data signal lines and one second data signal line located on a same side of the two first data signal lines form one data signal line group; in at least one data signal line group, a first distance exists between two adjacent first data signal lines, a second distance exists between the first data signal line and the second data signal line adjacent to each other, and the first distance is less than the second distance; at least two adjacent data signal line groups are arranged symmetrically with respect to a symmetry axis.

6 . The display device according to claim 4 , wherein the scan signal lines, the first low-level signal sub-line, and the high-level signal lines each extend in a first direction, and the data signal lines, the sensing signal lines, and the second low-level signal sub-line each extend in a second direction; the first direction intersects the second direction.

7 . The display device according to claim 4 , wherein the display module further comprises an insulating layer between the first metal layer and the second metal layer, the insulating layer is provided with a plurality of second via holes in the display area;
the first metal layer further comprises a plurality of first transferring electrodes, at least one data signal line and at least one sensing signal line are electrically connected with the bottom electrodes correspondingly through the second via holes, the first transferring electrodes and the first via holes.

8 . The display device according to claim 2 , wherein the display module further comprises a planarization layer and a light emitting device on a side of the pixel circuit away from the flexible substrate;
the light emitting device comprises a light emitting function layer, a first electrode and a second electrode, the first electrode is on a side, facing the flexible substrate, of the light emitting function layer, and the second electrode is on a side, away from the flexible substrate, of the light emitting function layer; the planarization layer comprises a plurality of third via holes and a plurality of fourth via holes in the display area, the first electrode is electrically connected with a driving transistor of the pixel circuit through the third via hole, and the second electrode is electrically connected with the second low-level signal sub-line through the fourth via hole.

9 . The display device according to claim 8 , wherein the display module further comprises a plurality of second transferring electrodes on a side of a layer, where the pixel circuit is located, away from the flexible substrate, and the insulating layer further comprises a plurality of fifth via holes; the second electrode is electrically connected with the first low-level signal sub-line through the second transferring electrode, the fourth via hole, the second low-level signal sub-line and the fifth via hole,
the second transferring electrodes are disposed in the same layer as the first electrode, and the pixel circuit further comprises a third metal layer on a side of the second metal layer away from the flexible substrate, and the third metal layer comprises the second transferring electrodes.

10 . The display device according to claim 8 , wherein the display module further comprises a pixel defining layer between a layer where the first electrode is located and the light emitting function layer;
the pixel defining layer comprises a pixel opening exposing at least part of the first electrode and a sixth via hole exposing the second transferring electrode.

11 . The display device according to claim 8 , wherein the display module further comprises a thin film encapsulation layer on a side of the light emitting device away from the flexible substrate.

12 . The display device according to claim 1 , wherein the pixel circuit comprises a capacitor, the first metal layer further comprises a first electrode of the capacitor, and the second metal layer further comprises a second electrode of the capacitor.

13 . The display device according to claim 1 , wherein the pixel circuit comprises an oxide active layer on a side of the first metal layer away from the flexible substrate.

14 . The display device according to claim 1 , further comprising: a connection structure electrically connected between the first connection electrodes and the bottom electrodes,
wherein the connection structure comprises at least one of an anisotropic conductive adhesive, a conductive silver paste, or an alloy formed by eutectic bonding.

15 . The display device according to claim 1 , wherein the driving circuit board further comprises a substrate provided with a plurality of seventh via holes, and a plurality of second connection electrodes on a side, away from the first connection electrodes, of the substrate, and at least part of the first connection electrodes are electrically connected with the second connection electrodes one to one through the seventh via holes.

Assignees

• Beijing Boe Technology Dev Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Sun tuo
• Liang Kui
• Zhang Shuo

Classifications

• H10K59/1216

  the pixel elements being capacitors · CPC title

• H10K77/111 Primary

  Flexible substrates · CPC title

• H10K59/122

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/1201

  Manufacture or treatment · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title