JP2022065790A5

JP2022065790A5 - liquid crystal display device

Info

Publication number: JP2022065790A5
Application number: JP2020174493A
Authority: JP
Filing date: 2020-10-16
Publication date: 2023-10-11

Claims

A liquid crystal display device comprising a display area that displays an image using a plurality of pixels arranged in a matrix,
an array substrate on which TFTs are arranged corresponding to the plurality of pixels;
a counter substrate disposed opposite to the array substrate and having a coloring material and a light-blocking area corresponding to the plurality of pixels;
a liquid crystal layer made of liquid crystal sandwiched between the array substrate and the counter substrate;
a first electrode having a slit shape and provided corresponding to the plurality of pixels on a surface of the array substrate facing the liquid crystal layer;
a second electrode that is provided on a surface of the array substrate facing the liquid crystal layer, corresponding to the plurality of pixels, and that forms an electric field in a direction parallel to the substrate surface of the array substrate due to a potential difference with the first electrode; and,
a first alignment film provided on a surface of the array substrate in contact with the liquid crystal layer, on which a first alignment axis for controlling the alignment direction of the liquid crystal is formed;
a second alignment film provided on a surface of the counter substrate in contact with the liquid crystal layer, on which a second alignment axis is formed that is parallel to the first alignment axis and controls the alignment direction of the liquid crystal;
a ridge that is arranged between the array substrate and the counter substrate so as to overlap the first electrode in a plan view and extend in a direction parallel to the first alignment axis, and controls the alignment of the liquid crystal;
A liquid crystal display device comprising:

The liquid crystal display device has a multi-domain structure including a plurality of regions with different alignment directions within the pixel, and the ridge overlaps the first electrode between the plurality of regions with different alignment directions in a plan view. The liquid crystal display device according to claim 1, wherein the liquid crystal display device is arranged as follows.

A liquid crystal display device comprising a display area that displays an image using a plurality of pixels arranged in a matrix,
an array substrate on which TFTs are arranged corresponding to the plurality of pixels;
a counter substrate disposed opposite to the array substrate and having a coloring material and a light-blocking area corresponding to the plurality of pixels;
a liquid crystal layer made of liquid crystal sandwiched between the array substrate and the counter substrate;
a first electrode having a slit shape and provided corresponding to the plurality of pixels on a surface of the array substrate facing the liquid crystal layer;
a second electrode that is provided on a surface of the array substrate facing the liquid crystal layer, corresponding to the plurality of pixels, and that forms an electric field in a direction parallel to the substrate surface of the array substrate due to a potential difference with the first electrode; and,
a first alignment film provided on a surface of the array substrate in contact with the liquid crystal layer, on which a first alignment axis for controlling the alignment direction of the liquid crystal is formed;
a second alignment film provided on a surface of the counter substrate in contact with the liquid crystal layer, on which a second alignment axis is formed that is parallel to the first alignment axis and controls the alignment direction of the liquid crystal;
a ridge that is arranged between the array substrate and the counter substrate so as to overlap the light-blocking region in a plan view and extend in a direction parallel to the first alignment axis, and controls the alignment of the liquid crystal;
A liquid crystal display device comprising:

4. The liquid crystal display device according to claim 1 , wherein the ridges are arranged on a surface of the array substrate facing the liquid crystal layer.

4. The liquid crystal display device according to claim 1 , wherein the ridges are arranged on a surface of the counter substrate facing the liquid crystal layer.

The liquid crystal display device is formed on a surface of the array substrate facing the liquid crystal layer or a surface of the counter substrate facing the liquid crystal layer, and is sandwiched between the array substrate and the counter substrate and is arranged between the array substrate and the counter substrate. It has a spacer that maintains the distance between the substrates within a certain range,
4. The liquid crystal display device according to claim 1 , wherein the ridge is formed on the same surface and made of the same material as the surface on which the spacer is formed.

The height of the ridge in the direction of the cell gap, which is the distance between the array substrate and the opposing substrate, is less than or equal to the size of the cell gap and more than half the size of the cell gap. The liquid crystal display device according to any one of claims 1 to 6 .

A liquid crystal display device comprising a display area that displays an image using a plurality of pixels arranged in a matrix,
an array substrate on which TFTs are arranged corresponding to the plurality of pixels;
a counter substrate disposed opposite to the array substrate and having a coloring material and a light-blocking area corresponding to the plurality of pixels;
a liquid crystal layer made of liquid crystal sandwiched between the array substrate and the counter substrate;
a first electrode having a slit shape and provided corresponding to the plurality of pixels on a surface of the array substrate facing the liquid crystal layer;
a second electrode that is provided on a surface of the array substrate facing the liquid crystal layer, corresponding to the plurality of pixels, and that forms an electric field in a direction parallel to the substrate surface of the array substrate due to a potential difference with the first electrode; and,
a first alignment film provided on a surface of the array substrate in contact with the liquid crystal layer, on which a first alignment axis for controlling the alignment direction of the liquid crystal is formed;
a second alignment film provided on a surface of the counter substrate in contact with the liquid crystal layer, on which a second alignment axis is formed that is parallel to the first alignment axis and controls the alignment direction of the liquid crystal;
on a surface of the array substrate facing the liquid crystal layer or on a surface of the counter substrate facing the liquid crystal layer so as to overlap the first electrode in plan view and extend in a direction parallel to the first alignment axis. a groove provided to control the alignment of the liquid crystal;
A liquid crystal display device comprising:

The liquid crystal display device has a multi-domain structure including a plurality of regions with different orientation directions in the pixel, and the groove overlaps the first electrode between the regions with different orientation directions in a plan view. 9. The liquid crystal display device according to claim 8 , wherein the liquid crystal display device is arranged as follows.

A liquid crystal display device comprising a display area that displays an image using a plurality of pixels arranged in a matrix,
an array substrate on which TFTs are arranged corresponding to the plurality of pixels;
a counter substrate disposed opposite to the array substrate and having a coloring material and a light-blocking area corresponding to the plurality of pixels;
a liquid crystal layer made of liquid crystal sandwiched between the array substrate and the counter substrate;
a first electrode having a slit shape and provided corresponding to the plurality of pixels on a surface of the array substrate facing the liquid crystal layer;
a second electrode that is provided on a surface of the array substrate facing the liquid crystal layer, corresponding to the plurality of pixels, and that forms an electric field in a direction parallel to the substrate surface of the array substrate due to a potential difference with the first electrode; and,
a first alignment film provided on a surface of the array substrate in contact with the liquid crystal layer, on which a first alignment axis for controlling the alignment direction of the liquid crystal is formed;
a second alignment film provided on a surface of the counter substrate in contact with the liquid crystal layer, on which a second alignment axis is formed that is parallel to the first alignment axis and controls the alignment direction of the liquid crystal;
provided on a surface of the array substrate facing the liquid crystal layer or a surface of the counter substrate facing the liquid crystal layer so as to overlap with the light shielding region in plan view and extend in a direction parallel to the first alignment axis. , a groove for controlling the alignment of the liquid crystal;
A liquid crystal display device comprising:

A first insulating layer is provided between the first electrode and the second electrode,
11. The liquid crystal display device according to claim 8, wherein the groove is formed by digging into the first insulating layer.

A first insulating layer is provided between the first electrode and the second electrode,
11. The groove according to claim 8, wherein the groove is formed by digging into a second insulating layer disposed at a position farther from the liquid crystal layer than the first electrode and the second electrode. The liquid crystal display device according to any one of the items .

11. The liquid crystal display device according to claim 8 , wherein the groove is provided on a surface of the counter substrate facing the liquid crystal layer.