Manufacturing method of liquid crystal display panel and liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-12189244-B2
Application number	US-201916500719-A
Country	US
Kind code	B2
Filing date	Apr 18, 2019
Priority date	Nov 28, 2018
Publication date	Jan 7, 2025
Grant date	Jan 7, 2025

Abstract

The present invention provides a manufacturing method of a liquid crystal display (LCD) panel and the LCD panel. A thin film transistor (TFT) substrate and a color filter (CF) substrate are first bonded, a liquid crystal material is enclosed between the TFT and CF substrates to obtain a liquid crystal cell, which is then irradiated with ultraviolet light to obtain a functional liquid crystal layer, and finally a black matrix is formed on a side of the CF substrate away from the TFT substrate. By changing the structure of the existing LCD panel, the present invention prevents the shading of the black matrix that affects functional liquid crystal layer production. It is advantageous for a polymer liquid crystal technology, a self-aligned liquid crystal technology, and the like to realize a technique of forming a specific functional layer by irradiating the liquid crystal cell with ultraviolet light.

First claim

What is claimed is:

1. A manufacturing method of a liquid crystal display (LCD) panel, comprising the following steps:
step S1, providing a thin film transistor (TFT) substrate, a color filter (CF) substrate, and a liquid crystal material;
wherein the liquid crystal material comprises liquid crystal molecules and reactive monomers;
step S2, dropping the liquid crystal material on the TFT substrate or the CF substrate, bonding the TFT substrate and the CF substrate, and sealing the liquid crystal material between the TFT substrate and the CF substrate to obtain a liquid crystal cell;
step S3, irradiating the liquid crystal cell with ultraviolet light, and reacting the reactive monomers in the liquid crystal material under irradiation of ultraviolet light to obtain a functional liquid crystal layer;
heating the liquid crystal cell before irradiating ultraviolet light, so that the liquid crystal material in the liquid crystal cell reaches a clearing point temperature; and
step S4, forming a black matrix on a side of the CF substrate away from the TFT substrate; and
forming a transparent conductive layer to cover a black matrix over a side of the CF substrate away from the TFT substrate.

2. The manufacturing method of the LCD panel as claimed in claim 1 , wherein the liquid crystal material provided in the step S1 is a self-aligning liquid crystal material;
in the step S3, the liquid crystal cell is irradiated from the TFT substrate side and the CF substrate side of the liquid crystal cell by using polarized ultraviolet light, respectively, and the reactive monomers are polymerized under irradiation of polarized ultraviolet light to form two self-aligning layers on opposite sides of the TFT substrate and the CF substrate respectively; and
the functional liquid crystal layer comprises the two self-aligning layers, and a liquid crystal molecular layer disposed between the two self-aligning layers.

3. The manufacturing method of the LCD panel as claimed in claim 1 , wherein the liquid crystal material provided in the step S1 is a polymer wall liquid crystal material;
in the step S3, the method further comprises: providing a photomask, placing the photomask on the liquid crystal cell before irradiating ultraviolet light, and then irradiating the liquid crystal cell from above the photomask using ultraviolet light, wherein the ultraviolet light that passes through a light transmitting portion of the photomask is irradiated on the liquid crystal material in the liquid crystal cell to form an ultraviolet light irradiation area, and the reactive monomers are polymerized in the ultraviolet light irradiation area to form a plurality of polymer walls having upper and lower ends that are respectively connected to the TFT substrate and the CF substrate; and
the functional liquid crystal layer comprises the polymer walls and a liquid crystal molecular layer separated into a plurality of area by the polymer walls.

4. The manufacturing method of the LCD panel as claimed in claim 1 , wherein the TFT substrate provided in the step S1 comprises a first substrate and a metal trace disposed on the first substrate; and
the CF substrate comprises a second substrate and a plurality of color blocks disposed on the second substrate and arranged in an array.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Cheng Wei

Classifications

• G02F1/13394

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

• G02F1/133723

  Polyimide, polyamide-imide · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/133512 Primary

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

• G02F1/133377

  Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel · CPC title