Display module having glass substrate on which side wirings are formed and manufacturing method of the same

Patent metadata

Field	Value
Publication number	US-11056630-B2
Application number	US-202016786514-A
Country	US
Kind code	B2
Filing date	Feb 10, 2020
Priority date	Feb 13, 2019
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

A display module includes a glass substrate having a front surface and a back surface opposite to the front surface; a TFT layer; LEDs mounted on the TFT layer; and a plurality of side wirings formed at intervals in an edge area of the glass substrate, and the edge area includes a first area corresponding to a side surface of the glass substrate, a second area adjacent to the side surface, and a third area adjacent to the side surface, and a first chamfered surface formed by chamfering a corner at which the first area and the second area meet, and a second chamfered surface formed by chamfering a corner at which the first area and the third area meet, and each of the plurality of side wirings is disposed along the second area, the first chamfered surface, the first area, the second chamfered surface, and the third area.

First claim

What is claimed is:

1. A display module comprising:
a glass substrate of a quadrangle type having a front surface and a back surface opposite to the front surface;
a thin film transistor (TFT) layer formed on the front surface of the glass substrate;
a plurality of light emitting diodes (LEDs) mounted on the TFT layer; and
a plurality of side wirings formed at intervals in an edge area of the glass substrate,
wherein the edge area comprises:
a first area corresponding to a side surface of the glass substrate;
a second area adjacent to the side surface of the glass substrate in the front surface of the glass substrate;
a third area adjacent to the side surface of the glass substrate in the back surface of the glass substrate;
a first chamfered surface formed at a corner at which the first area and the second area meet; and
a second chamfered surface formed at a corner at which the first area and the third area meet, and

wherein each of the plurality of side wirings is disposed along the second area, the first chamfered surface, the first area, the second chamfered surface, and the third area.

2. The display module as claimed in claim 1 , wherein a height of the first chamfered surface is less than 10% of a thickness of the glass substrate.

3. The display module as claimed in claim 1 , wherein a height of the second chamfered surface is less than 10% of a thickness of the glass substrate.

4. The display module as claimed in claim 1 , wherein the plurality of side wirings are formed by screen printing with conductive ink.

5. The display module as claimed in claim 1 , wherein one end portion of each of the plurality of side wirings is electrically connected to a first connection pad disposed in the second area, and
wherein another end portion of each of the plurality of side wirings is electrically connected to a second connection pad disposed in the third area, and
wherein the first connection pad is connected to a pixel driving circuit of the TFT layer, and the first connection pad is connected to a driver Integrated Circuit disposed in a rear surface of a glass substrate.

6. The display module as claimed in claim 1 , further comprising a plurality of connection pads formed in the edge area and electrically connected to the plurality of side wirings, and an insulating layer having grooves and disposed on the plurality of connection pads, the plurality of connection pads formed in the edge area being partially exposed by the grooves of the insulating layer.

7. A display module comprising:
a glass substrate of a quadrangle type having a front surface and a back surface opposite to the front surface;
a thin film transistor (TFT) layer formed on the front surface of the glass substrate;
a plurality of light emitting diodes (LEDs) mounted on the TFT layer; and
a plurality of side wirings disposed along edge areas of at least two sides of the glass substrate, the plurality of side wirings being disposed at substantially equal intervals,
wherein the glass substrate includes a chamfered surface through which the plurality of side wirings pass and the chamfered surface is formed at a corner of each of the edge areas of the at least two sides.

8. The display module as claimed in claim 7 , wherein the edge areas of the at least two sides correspond to a pair of opposing sides in the glass substrate, respectively.

9. The display module as claimed in claim 7 , wherein the edge areas of the at least two sides correspond to a pair of adjacent sides in the glass substrate, respectively.

10. The display module as claimed in claim 7 , wherein the number of the plurality of side wirings is equal to or less than the number of LEDs mounted on the TFT layer.

11. A manufacturing method of a display module, the manufacturing method comprising:
forming a thin film transistor (TFT) layer on a glass substrate;
forming a chamfered surface at a corner of at least one edge area of edge areas of the glass substrate;
forming a plurality of side wirings electrically connected to a plurality of connection pads disposed in an edge of the TFT layer in the at least one edge area of the glass substrate in which the chamfered surface is formed; and
transferring a plurality of light emitting diodes (LEDs) onto the TFT layer.

12. The manufacturing method as claimed in claim 11 , wherein the chamfered surface is formed to have a height less than 10% of a thickness of the glass substrate.

13. The manufacturing method as claimed in claim 11 , wherein an inclination angle of the chamfered surface is less than 45 degrees with respect to an imaginary plane extending from a side surface of the glass substrate.

14. The manufacturing method as claimed in claim 11 , wherein the plurality of side wirings are formed by one of a laser patterning process, a pad printing process, an ink screening process, and a sputtering process.

15. The manufacturing method as claimed in claim 11 , wherein in the forming of the plurality of side wirings, the plurality of side wirings are formed at positions corresponding to a pair of opposing sides in the glass substrate, respectively.

16. The manufacturing method as claimed in claim 11 , wherein in the forming of the plurality of side wirings, the number of the plurality of side wirings is formed to be equal to or less than the number of LEDs mounted on the TFT layer.

17. The manufacturing method as claimed in claim 11 , wherein the forming the plurality of side wirings comprises:
forming a metal film on the edge area and a side surface of the glass substrate;
irradiating, by a laser beam irradiator, a laser beam on the metal film from an end of the metal film to a middle portion of the chamfered surface;
rotating the glass substrate relative to the laser beam irradiator; and
irradiating, by the laser beam irradiator, the laser beam on the metal film from the middle portion of the chamfered surface to the side surface.

18. The manufacturing method as claimed in claim 11 , wherein the forming the plurality of side wirings comprises:
preparing a carrier film having a plurality of conductive ribbons;
disposing the carrier film on the edge area;
performing a thermal compressing on the edge area; and
removing the carrier film with the plurality of conductive ribbons remaining in the edge area.

19. The manufacturing method as claimed in claim 11 , wherein the forming the plurality of side wirings comprises:
preparing a three-dimensional pad having a plurality of conductive ribbons;
disposing the three-dimensional pad on the edge area;
pressing the three-dimensional pad at a predetermined pressure; and
separating the three-dimensional pad from the edge area with the plurality of conductive ribbons remaining in the edge area.

20. The manufacturing method as claimed in claim 11 , wherein the forming the plurality of side wirings comprises:
applying, by a nozzle, a conductive ink on the glass substrate from a connection pad of the plurality of connection pads to the edge area;
rotating the glass substrate relative to the nozzle; and
applying, by the nozzle, the conductive ink on the glass substrate from the chamfered surface toward a side surface the glass substrate.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Hong Soonmin
• Kim Gyuhwa
• Yoon Jeonggen
• Lee Tackmo
• Heo Gyun
• Moon Youngjun
• Jang Kyungwoon

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H10W20/031

  of conductive parts of the interconnections · CPC title

• H10H29/0364

  of interconnections · CPC title

• H10H29/857

  Interconnections (of active-matrix LED displays H10H29/49) · CPC title

• H10H29/49

  Interconnections, e.g. wiring lines or terminals (connection of the pixel electrodes to the driving transistors H10H29/39) · CPC title