Light valve panel and liquid crystal display using the same

Patent metadata

Field	Value
Publication number	US-10303019-B2
Application number	US-201715605347-A
Country	US
Kind code	B2
Filing date	May 25, 2017
Priority date	May 31, 2016
Publication date	May 28, 2019
Grant date	May 28, 2019

Abstract

A light valve panel and a liquid crystal display using the same are discussed. The light valve panel according to an aspect includes a liquid crystal layer, a first electrode including a block corresponding one-to-one with a light valve data line, and a second electrode facing the first electrode with the liquid crystal layer interposed therebetween. An angle between a vertical edge of the block and the light valve data line is greater than 0° and less than 90°. The liquid crystal display device according to another aspect includes a display panel, a backlight unit, and a light valve panel.

First claim

What is claimed is:

1. A light valve panel including an active area and a bezel area located outside the active area, comprising:
a first electrode disposed on an entire surface of a first substrate of the light valve panel and defined by a plurality of blocks located in the active area and the bezel area is located where the plurality of blocks is not disposed;
a plurality of light valve data lines connected to the first electrode through a plurality of contact holes and directly supplying a light valve data voltage to the first electrode without a thin film transistor, a gate line and a scan line in the light valve panel, wherein each block corresponds to each light valve data line and more than one pixels, so that the more than one pixels in close proximity to the plurality of contact holes are supplied with a voltage close to the light valve data voltage supplied to the first electrode; and
a second electrode on a second substrate and facing the first electrode,
wherein the light valve panel adjusts an amount of light to be emitted by a difference in voltages supplied to the first and second electrodes,
wherein the plurality of the light valve data lines extends in parallel within the active area in an oblique direction with respect to a vertical edge along a Y-axis direction of the active area and forms an angle (θ) with respect to a vertical edge along the Y-axis direction of each block in the active area, and four corners of each block are defined by four vertically (the Y-axis direction) and horizontally (an X-axis direction) adjacent contact holes of the plurality of contact holes, and
wherein the angle (θ) between the plurality of light valve data lines and the vertical edge along the Y-axis direction of each block in the active area is determined by an equation of tan θ=L 1 /(L 2 ×N), where L 1 is a length of a horizontal edge of each block, L 2 is a length of the vertical edge of each block and N is a number of rows of the blocks in the active area.

2. The light valve panel of claim 1 , wherein the bezel area has a width substantially the same as a horizontal width of the plurality of blocks.

3. The light valve panel of claim 2 , wherein a tangent of an angle is the horizontal width of the plurality of blocks divided by a vertical width of the active area.

4. The light valve panel of claim 1 , wherein
the plurality of contact holes is disposed in parallel with a vertical edge of the plurality of blocks.

5. The light valve panel of claim 1 , further comprising a dummy line disposed at a dummy area where the light valve data line is not disposed at the active area.

6. A liquid crystal display device comprising:
a display panel including a plurality of pixels to which an input image is applied;
a backlight unit irradiating light onto the display panel; and
a light valve panel disposed between the display panel and the backlight unit, the light valve panel configured to adjust an amount of the irradiated light from the backlight unit depending on the input image,
wherein the light valve panel where an active area and a bezel area located outside the active area are defined, the light valve panel includes:
a liquid crystal layer;
a first electrode disposed on an entire surface of a first substrate of the light valve panel and defined by a plurality of blocks located in the active area and the bezel area is located where the plurality of blocks is not disposed;
a plurality of light valve data lines connected to the first electrode through a plurality of contact holes and directly supplying a light valve data voltage to the first electrode without a thin film transistor, a gate line and a scan line in the light valve panel, wherein each block corresponds to each light valve data line and more than one pixels, so that the more than one pixels in close proximity to the plurality of contact holes are supplied with a voltage close to the light valve data voltage supplied to the first electrode; and
a second electrode on a second substrate and facing the first electrode with the liquid crystal layer interposed therebetween,
wherein the light valve panel adjusts an amount of light to be emitted by a difference in voltages supplied to the first and second electrodes,
wherein the plurality of the light valve data lines extends in parallel within the active area in an oblique direction with respect to a vertical edge along a Y-axis direction of the active area and forms an angle (θ) with respect to a vertical edge along the Y-axis direction of each block in the active area, and four corners of each block are defined by four vertically (the Y-axis direction) and horizontally (an X-axis direction) adjacent contact holes of the plurality of contact holes, and
wherein the angle (θ) between the plurality of light valve data lines and the vertical edge along the Y-axis direction of each block in the active area is determined by an equation of tan θ=L 1 /(L 2 ×N), where L 1 is a length of a horizontal edge of each block, L 2 is a length of the vertical edge of each block and N is a number of rows of the blocks in the active area.

7. The liquid crystal display device of claim 6 , wherein the bezel area has a width substantially equal to a horizontal width of the plurality of blocks.

8. The liquid crystal display device of claim 7 wherein a tangent of an angle is the horizontal width of the plurality of blocks divided by a vertical width of the active area.

9. The liquid crystal display device of claim 6 ,
the plurality of contact holes is disposed in parallel with a vertical edge of the plurality of blocks.

10. The liquid crystal display device of claim 6 , further comprising a dummy line disposed at a dummy area where the plurality of light valve data lines—is not disposed at the active area.

11. A light valve panel having first and second substrates configured to adjust an amount of light from a light source in accordance with an input image to be displayed, and including an active area and a bezel area located outside the active area are defined, the light valve panel comprising:
a first electrode disposed on an entire surface of the first substrate and defined by a plurality of blocks located in the active area and the bezel area is located where the plurality of blocks is not disposed;
a plurality of light valve data lines connected to the first electrode through a plurality of contact holes and directly supplying a light valve data voltage to the first electrode without a thin film transistor, a gate line and a scan line in the light valve panel, wherein each block corresponds to each light valve data line and more than one pixels, so that the more than one pixels in close proximity to the plurality of contact holes are supplied with a voltage close to the light valve data voltage supplied to the first electrode;
a second electrode on the second substrate and facing the first electrode; and
liquid crystal molecules between the first and second substrates, wherein the liquid crystal molecules are synchronized with the input image to be displayed by the light valve voltage,
wherein the light valve panel adjusts an amount of light to be emitted by a difference in voltages supplied to the first and second electrodes,
wherein the plurality of the light valve data lines extends in parallel within the active area in an oblique direction with respect to a vertical edge along a Y-axis direction of the active area and forms an angle (θ) with respect to a vertical edge along the Y-axis direction of each block in the active area, and four corners of each block are defined by four vertically (the Y-axis direction) and horizontally (an X-axis direction) adjacent contact holes of the plurality

Assignees

• Lg Display Co Ltd

Inventors

• Nam Sangjin
• Yoo Ooksang
• Kim Kyujin
• Yoo Seungjin

Classifications

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/1336

  Illuminating devices · CPC title

• G02F1/133509

  Filters, e.g. light shielding masks · CPC title

• G02F1/1347

  Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title