Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9933665-B2
Application number	US-201514826955-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Sep 18, 2014
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

Disclosed is a liquid crystal display device that includes first and second substrates; a liquid crystal layer between the first and second substrates; first and second bumps on the first substrate; and at least one first protrusion facing the first bump, and at least one second protrusion facing the second bump, the first and second protrusions being on the second substrate, wherein the first protrusion faces one side of the first bump, and the second protrusion faces the other side of the second bump.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
first and second substrates;
a liquid crystal layer between the first and second substrates;
gate and data lines on the first substrate, the gate line being in a first direction, and the data line being in a second direction;
first and second bumps on the first substrate;
at least one first protrusion facing the first bump, and at least one second protrusion facing the second bump, the first and second protrusions being on the second substrate; and
an alignment film between the first bump and the first protrusion, and between the second bump and the second protrusion,
wherein the at least one first protrusion faces one side of the first bump, and the at least one second protrusion faces the other side of the second bump,
wherein the alignment film includes a first alignment film covering the first bump and the second bump, and a second alignment film covering the at least one first protrusion and the at least one second protrusion, and a portion of the first alignment film corresponding to the first bump and the second bump contacts a portion of the second alignment film corresponding to the at least one first protrusion and the at least one second protrusion,
wherein the first bump includes a first bar extending in a length direction of the gate line, the first bar overlapping the gate line,
wherein the second bump includes a second bar extending in the length direction of the gate line, the second bar overlapping the gate line, and
wherein the at least one first protrusion is smaller in size than the first bump and has a dot structure overlapped with the first bump, and the at least one second protrusion is smaller in size than the second bump and has a dot structure overlapped with the second bump.

2. The liquid crystal display device according to claim 1 ,
wherein the first bump further includes a first extending portion extending from one side and from the other side of the first bar, and the second bump further includes a second extending portion extending from one side and from the other side of the second bar, and
wherein the at least one first protrusion is overlapped with the first extending portion extending from the one side of the first bar, and the at least one second protrusion is overlapped with the second extending portion extending from the other side of the second bar.

3. The liquid crystal display device according to claim 2 , further comprising a light-shielding layer overlapping the gate and data lines, a first extending light-shielding portion overlapping the first extending portion of the first bump, and a second extending light-shielding portion overlapping the second extending portion of the second bump, the light-shielding layer, the first extending light-shielding portion and the second extending light-shielding portion being on the second substrate.

4. A liquid crystal display device, comprising:
first and second substrates;
a liquid crystal layer between the first and second substrates;
gate and data lines on the first substrate, the gate line being in a first direction, and the data line being in a second direction;
first and second bumps on the first substrate;
at least one first protrusion facing the first bump, and at least one second protrusion facing the second bump, the first and second protrusions being on the second substrate; and
an alignment film between the first bump and the first protrusion, and between the second bump and the second protrusion,
wherein the at least one first protrusion faces one side of the first bump, and the at least one second protrusion faces the other side of the second bump,
wherein the alignment film includes a first alignment film covering the first bump and the second bump, and a second alignment film covering the at least one first protrusion and the at least one second protrusion, and a portion of the first alignment film corresponding to the first bump and the second bump contacts a portion of the second alignment film corresponding to the at least one first protrusion and the at least one second protrusion,
wherein the first bump includes a first bar extending in a length direction of the gate line, the first bar overlapping the gate line,
wherein the second bump includes a second bar extending in the length direction of the gate line, the second bar overlapping the gate line,
wherein the first bump further includes a first extending portion extending from one side of the first bar, and a first groove is at the other side of the first bar,
the second bump further includes a second extending portion extending from the other side of the second bar, and a second groove is at one side of the second bar, and
the at least one first protrusion is overlapped with the first extending portion extending from the one side of the first bar, and the at least one second protrusion is overlapped with the second extending portion extending from the other side of the second bar.

5. The liquid crystal display device according to claim 4 ,
wherein the first and second protrusions include a bar structure extending in a length direction of the data line, the first and second protrusion overlapping the data line,
one portion of the at least one first protrusion is overlapped with the first extending portion, and another portion of the at least one first protrusion is not overlapped with the first extending portion, and
one portion of the at least one second protrusion is overlapped with the second extending portion, and another portion of the at least one second protrusion is not overlapped with the second extending portion.

6. The liquid crystal display device according to claim 4 , further comprising a light-shielding layer overlapping the gate and data lines, a first extending light-shielding portion overlapping the first extending portion of the first bump, and a second extending light-shielding portion overlapping the second extending portion of the second bump, the light-shielding layer, the first extending light-shielding portion and the second extending light-shielding portion being on the second substrate.

7. The liquid crystal display device according to claim 1 , wherein the first bump and the second bump are connected with each other by a connection portion.

8. The liquid crystal display device according to claim 1 , wherein the first bump and the at least one first protrusion maintain a cell gap of the liquid crystal layer, and the second bump and the at least one second protrusion maintain the cell gap of the liquid crystal layer.

9. The liquid crystal display device according to claim 1 , wherein one side of the first bump and the other side of the second bump are in combination with one among a combination of the left side with respect to the center of the first bump and the right side with respect to the center of the second bump, a combination of the right side with respect to the center of the first bump and the left side with respect to the center of the second bump, a combination of the upper side with respect to the center of the first bump and the lower side with respect to the center of the second bump, a combination of the lower side with respect to the center of the first bump and the upper side with respect to the center of the second bump, a combination of the lower left side with respect to the center of the first bump and the upper right side with respect to the center of the second bump, a combination of the upper left side with respect to the center of the first bump and the lower right side with respect to the center of the second bump, a combination of the lower right side with respect to the center of the first bump and the upper left side with respect to the

Assignees

• Lg Display Co Ltd

Inventors

• Jeon Saet Byeol
• Jung Jong Wook

Classifications

• G02F1/13394 Primary

  spacers regularly patterned on the cell subtrate, e.g. walls, pillars (G02F1/133377 takes precedence) · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title