# US 10,504,849 B2 · Display device and method for manufacturing the same

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- Number: US 10,504,849 B2
- Document ID: US10504849B2
- Status: Granted
- Kind: B2
- Application number: 14/579,494
- Filed: 2014-12-22
- Published: 2015-06-25
- Granted: 2019-12-10
- Earliest claimed: 2013-12-24
- Assignees: LG Display Co., Ltd.
- Applicants: LG Display Co., Ltd.
- Inventors: Seung-Hyun Youk; Soon-Sung Yoo; Chul-Ho Kim; Nam-Kook Kim
- Web page: https://patentgrep.com/patent/US10504849B2

## CPC

- H10W 46/00: Marks applied to devices, e.g. for alignment or identification
- G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)}
- G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels}
- G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)}
- H10K 59/8792: {comprising light absorbing layers, e.g. black layers}
- G02F 1/133354: {Arrangements for aligning or assembling substrates}
- H10K 59/131: Interconnections, e.g. wiring lines or terminals
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 59/871: {Self-supporting sealing arrangements}
- H10W 46/301: {for alignment}
- H10W 46/607: {Located on parts of packages, e.g. on encapsulations or on package substrates}
- Y10T 428/24802: Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed is a method for forming a display device. The method includes forming an alignment mark on a front surface of a substrate having a display region and a non-display region surrounding the display region, forming an alignment protection pattern on a rear surface of the substrate such that the alignment protection pattern overlaps the alignment mark, and forming a light-shielding member in the non-display region on the rear surface of the substrate such that the light-shielding member forms a boundary with the alignment protection pattern.

## Claims

### Claim 1

A display device comprising:
a substrate having a display region and a non-display region surrounding the display region;
an alignment mark formed in the non-display region on a front surface of the substrate;
a light-shielding member formed in the non-display region on a rear surface of the substrate; and
a plurality of alignment protection patterns formed on the rear surface of the substrate,
wherein one of the alignment protection patterns overlaps the alignment mark, forms a boundary with the light-shielding member and does not overlap with the light-shielding member, and
wherein the light-shielding member is disposed between the plurality of alignment protection patterns, and encloses and borders an entire edge of each alignment protection pattern having an island shape.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein any one of the alignment protection patterns and the light-shielding member is formed of a hydrophilic material and the other is formed of a hydrophobic material.

### Claim 3 (depends on 2)

The display device according to claim 2, wherein the hydrophilic material comprises a substance having a terminal group selected from —OH, —CO2H (carboxyl group), —NH2 (amino group), —SH (thiol group) and —CONH2 (amide group), and
the hydrophobic material comprises a substance having a terminal group selected from —Cl, —F, —CH3 (alkyl group), and —C6H5 (phenyl group).

### Claim 4 (depends on 1)

The display device according to claim 1, further comprising an optical film adhered to the rear surface of the substrate, based on the alignment mark.

### Claim 5 (depends on 1)

The display device according to claim 1, further comprising outer signal lines, which provide driving signals to gate lines and data lines in the display region, in the non-display region on the front surface of the substrate.

### Claim 6 (depends on 5)

The display device according to claim 5, wherein the alignment mark is formed of a same material as one of the gate lines and the data lines in the display region.

### Claim 7 (depends on 1)

The display device according to claim 1, wherein the alignment protection patterns overlap the alignment mark, with the non-display region of the substrate therebetween.

### Claim 8 (depends on 5)

The display device according to claim 5, wherein the light-shielding member overlaps the outer signal lines outside the alignment mark, with the non-display region of the substrate therebetween.

### Claim 9 (depends on 1)

The display device according to claim 1, wherein the light-shielding member is in contact with an entire edge of each alignment protection pattern having the island shape in the non-display region.