Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10288916-B2
Application number	US-201715423062-A
Country	US
Kind code	B2
Filing date	Feb 2, 2017
Priority date	Jul 4, 2016
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A liquid crystal display (“LCD”) device is capable of consuming relatively less power and significantly reducing flickering that may occur when the LCD device is driven by low frequency, the LCD device including: a liquid crystal layer disposed between the first substrate and the second substrate; a gate line; a data line intersecting the gate line; a timing controller outputting a gate control signal by a frequency of about 15 hertz (Hz) to about 30 Hz; a first electrode on the first substrate; and a second electrode on the first substrate, the second electrode spaced apart from the first electrode. The first electrode includes a plurality of first branch electrodes having an angle of about 9 degrees to about 30 degrees with respect to a normal line which is orthogonal to the gate line.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
a first substrate and a second substrate opposing each other;
a liquid crystal layer disposed between the first substrate and the second substrate;
a gate line disposed on the first substrate, the gate line extending in a first direction;
a data line intersecting the gate line;
a timing controller connected to the gate line, the timing controller outputting a gate control signal by a frequency of about 15 hertz (Hz) to about 30 Hz;
a first electrode disposed on the first substrate; and
a second electrode disposed on the first substrate, the second electrode spaced apart from the first electrode,
wherein the first electrode comprises a plurality of first branch electrodes having an angle of about 9 degrees to about 30 degrees with respect to a normal line which is orthogonal to the gate line,
wherein the plurality of first branch electrodes have a first width, the plurality of first branch electrodes are spaced apart from one another at a first distance, and the first distance is greater than the first width,
wherein a ratio between the first distance and the first width is in a range of about 1:0.65 to about 1:0.85, and
wherein a sum of the first width and the first distance is equal to or greater than 5.0 μm and equal to or less than 6.0 μm.

2. The liquid crystal display device as claimed in claim 1 , further comprises a connecting electrode that connects the plurality of first branch electrodes,
wherein the connecting electrode is parallel to the gate line.

3. The liquid crystal display device as claimed in claim 1 , wherein the first branch electrode comprises at least one bent portion.

4. The liquid crystal display device as claimed in claim 1 , wherein the first branch electrode is symmetric with respect to a bent portion.

5. The liquid crystal display device as claimed in claim 1 , wherein the data line extends in a second direction which is substantially orthogonal to the first direction.

6. The liquid crystal display device as claimed in claim 1 , wherein the data line extends substantially parallel to the first branch electrode.

7. The liquid crystal display device as claimed in claim 1 , wherein the liquid crystal layer comprises liquid crystal molecules having positive dielectric anisotropy.

8. The liquid crystal display device as claimed in claim 1 , wherein the second electrode is a planar electrode.

9. The liquid crystal display device as claimed in claim 1 , wherein the second electrode comprises a second branch electrode parallel to the first branch electrode.

10. The liquid crystal display device as claimed in claim 1 , wherein the second electrode is disposed on substantially a same layer as a layer on which the first electrode is disposed.

11. The liquid crystal display device as claimed in claim 1 , further comprising a thin film transistor disposed on the first substrate, the thin film transistor connected to the gate line and the data line.

12. The liquid crystal display device as claimed in claim 11 , wherein the first electrode is connected to the thin film transistor.

13. The liquid crystal display device as claimed in claim 11 , wherein the second electrode is connected to the thin film transistor.

14. A liquid crystal display device comprising:
a first substrate and a second substrate opposing each other;
a liquid crystal layer disposed between the first substrate and the second substrate;
a gate line disposed on the first substrate, the gate line extending in a first direction;
a data line intersecting the gate line;
a timing controller connected to the gate line, the timing controller outputting a gate control signal by a frequency of about 15 hertz (Hz) to about 30 Hz;
a first electrode disposed on the first substrate; and
a second electrode disposed on the first substrate, the second electrode spaced apart from the first electrode,
wherein the first electrode comprises a plurality of first branch electrodes having an angle of about 9 degrees to about 30 degrees with respect to a normal line which is orthogonal to the gate line,
wherein the plurality of first branch electrodes have a first width, the plurality of first branch electrodes are spaced apart from one another at a first distance, and the first distance is greater than the first width,
wherein a sum of the first width and the first distance is equal to or greater than 5.0 μm and equal to or less than 6.0 μm.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Mihwa
• Kim Minhee
• Kim Taeho
• Park Soyoun
• Youn Soojung
• Lee Changhun

Classifications

• G02F1/136286

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

• G02F1/137

  characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering · CPC title

• G02F2001/13706

  Physics · mapped topic

• G02F2201/124

  interdigital · CPC title

• G02F2201/123

  pixel · CPC title