CN115657357A

CN115657357A - Liquid crystal display screen for improving blue edge phenomenon

Info

Publication number: CN115657357A
Application number: CN202211314973.3A
Authority: CN
Inventors: 马一
Original assignee: Fujian Huajiacai Co Ltd
Current assignee: Fujian Huajiacai Co Ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-01-31

Abstract

A liquid crystal display screen for improving blue edge phenomenon comprises: the liquid crystal display panel comprises a color film substrate, a thin film transistor substrate and liquid crystal clamped between the color film substrate and the thin film transistor substrate; the color film substrate comprises: the pixel structure comprises a glass substrate, a pixel region arranged on the glass substrate and an OC layer arranged above the pixel region; the pixel region includes: a central pixel region and a peripheral pixel region surrounding the periphery of the central pixel region, each pixel in the pixel region comprising: the pixel structure comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit; the OC layer thickness over the blue sub-pixel cells of the edge pixel area is greater than the OC layer thickness over the remaining sub-pixel cells. The thickness of the OC film covered on the blue sub-pixel at the edge is adjusted, the OC film can be thickened to reduce the penetration of light, the cellgap on the B sub-pixel is also reduced after the OC film is thickened, and the penetration rate of blue light can also be reduced, so that the blue light at the edge of the panel can be reduced.

Description

Liquid crystal display screen for improving blue edge phenomenon

Technical Field

The invention belongs to the technical field of manufacturing of display devices, and particularly relates to a liquid crystal display screen capable of improving a blue edge phenomenon.

Background

The liquid crystal display panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, a plurality of vertical and horizontal fine wires are arranged between the two glass substrates, and the liquid crystal molecules are controlled to change directions by electrifying or not, so that light rays of the backlight module are refracted out to generate pictures. Generally, a liquid crystal display panel is composed of a Color Filter (CF) substrate, a Thin Film Transistor (TFT) substrate, a Liquid Crystal (LC) sandwiched between the color filter substrate and the TFT substrate, and a Sealant (Sealant).

The TFT-LCD is a non-active light-emitting component, and the color display mode is as follows: the backlight module provides a white light source, the red, green and blue three primary colors are respectively generated by using the color light resistance of the color light filter through the color filter, and the voltage applied to the liquid crystal is adjusted through the TFT array to change the proportion of the three primary colors, so that a color display picture is finally generated.

With the continuous development of science and technology, consumers have higher and higher requirements on the picture quality of display devices, and the requirements on panels with high color saturation are gradually increased, so that the color gamut of the panels can be well improved by the color conversion technology on the premise. The color conversion technology is to convert blue light into red light and green light by using a color conversion film synthesized by organic molecular fluorescent dye and a blue LED backlight source when the blue light passes through, and the red light and the green light are mixed to form white light, so that the color gamut of the panel is greatly improved. In the current stage, although the color conversion technology can improve the image quality and the color gamut of the display panel device, blue edges may occur around the panel due to the fact that blue light is not completely converted in the backlight or the blue light is too strong at the edge, which affects the overall picture uniformity of the display.

Disclosure of Invention

The invention provides a liquid crystal display screen for improving blue edge phenomenon.

The invention is realized in the following way:

a liquid crystal display screen for improving blue edge phenomenon comprises: the liquid crystal display panel comprises a color film substrate, a thin film transistor substrate and liquid crystal clamped between the color film substrate and the thin film transistor substrate; the color film substrate comprises: the pixel structure comprises a glass substrate, a pixel region arranged on the glass substrate and an OC layer arranged above the pixel region; the pixel region includes: a central pixel region and an edge pixel region surrounding the periphery of the central pixel region, each pixel in the pixel region comprising: the pixel structure comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit;

the thickness of the OC layer above the blue sub-pixel unit of the edge pixel area is larger than the thickness of the OC layer above the rest sub-pixel units.

Further, the thickness of the OC layer above the blue sub-pixel unit is gradually increased from the area close to the edge pixel area.

The invention has the advantages that: the OC film thickness covered on the blue sub-pixel at the edge is adjusted, the OC film thickness is thickened, the penetration of light can be reduced, the cell gap (liquid crystal box thickness) on the B sub-pixel is also reduced after the OC film is thickened, the penetration rate of blue light can also be reduced, so that the blue light at the edge of the panel can be reduced, the OC film thickness is thickened at the more obvious position of the blue edge at the edge, the color gamut of the module is improved, the light of the panel is more uniform so as to improve the blue edge problem, the picture uniformity of the panel is better, and the market demand is met.

Drawings

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a blue edge position of a blue backlight with a conventional LCD panel.

Fig. 2 is a schematic diagram of a structure of a prior art lcd screen.

Fig. 3 is a schematic structural diagram of the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

Detailed Description

The backlight module of the prior blue light backlight with the quantum dot film and the color conversion film can effectively improve the color gamut of the panel and the image quality, but when the backlight module is used, the blue edge phenomenon can occur because the blue light is not completely converted at the periphery of the panel. As shown in fig. 1, the display region of the liquid crystal display panel 100 includes a central pixel region 102 (a region where the display effect is normal) and an edge pixel region 101 (a region affected by a blue edge) surrounding the periphery of the central pixel region 102.

As shown in fig. 2, the conventional lcd screen includes: the liquid crystal display panel comprises a color film substrate 1, a thin film transistor substrate 2 and a liquid crystal (Cellgap) sandwiched between the color film substrate 1 and the thin film transistor substrate 2; the color film substrate 1 includes: the liquid crystal display panel comprises a glass substrate 11, a pixel region 12 arranged on the glass substrate 11 and an OC (over coat) layer 13 arranged above the pixel region, wherein the OC layer 13 is a flat layer and is made of an organic transparent resin material, and the liquid crystal display panel has extremely high light transmittance of more than 95%; the pixel region includes: a central pixel region and an edge pixel region surrounding the periphery of the central pixel region, each pixel in the pixel region comprising: the pixel structure comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit.

The invention provides a liquid crystal display screen for improving blue edge phenomenon, as shown in fig. 3, wherein the thickness of OC layer above blue sub-pixel unit of edge pixel region is larger than that of OC layer above other sub-pixel units, that is, light sensitive OC material is used, and half-tone mask is used to change mask, so as to thicken OC layer on B sub-pixel color resistance of panel blue edge region, reduce cellgap corresponding to B sub-pixel, and reduce transmittance.

As another embodiment of the present invention, as shown in fig. 4, from the portion near the edge pixel region to the edge pixel region, the thickness of the OC layer above the blue sub-pixel unit gradually increases, that is, the OC layer is thicker closer to the edge of the blue edge, so as to reduce the transmission of blue light and improve the blue edge problem.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. A liquid crystal display screen for improving blue edge phenomenon comprises: the liquid crystal display panel comprises a color film substrate, a thin film transistor substrate and a liquid crystal clamped between the color film substrate and the thin film transistor substrate; the color film substrate comprises: the pixel structure comprises a glass substrate, a pixel region arranged on the glass substrate and an OC layer arranged above the pixel region; the pixel region includes: a central pixel region and an edge pixel region surrounding the periphery of the central pixel region, each pixel in the pixel region comprising: the pixel structure comprises a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit;

the method is characterized in that: the thickness of the OC layer above the blue sub-pixel unit of the edge pixel area is larger than the thickness of the OC layer above the rest sub-pixel units.

2. The liquid crystal display screen of claim 1, wherein the blue edge is improved by: and from near the edge pixel region to the edge pixel region, wherein the OC layer thickness over the blue sub-pixel cell gradually increases.