Liquid crystal display device

Abstract

The invention provides a liquid crystal display device. The liquid crystal display device includes: a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate; the first substrate includes: a first a substrate, a color filter disposed on the side of the first substrate away from the second substrate, and at least one transition film layer disposed between the first substrate and the color filter ; The refractive index of one of the first substrate or the at least one transition film layer is greater than 1.7, and the refractive index of the first substrate or the transition film layer is improved, which can reduce the incidence of light on the external color The horizontal moving distance before the filter can improve the color crosstalk problem when the color filter is placed outside, and improve the display quality of the liquid crystal display device.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a liquid crystal display device. Background technique [0002] Currently, the color of a Liquid Crystal Display (LCD) is realized by means of a color filter (color filter, CF) layer. The traditional CF layer is formed by color photoresist materials after a series of yellow light processes, and color photoresist materials are made by dissolving resin (polymer), monomer (monomer), photoinitator (photo initator) and pigment (pigment) Dispersed in a solvent (solvent) after the formation. [0003] Quantum Dots (Quantum Dots, referred to as QD) are invisible to the naked eye, extremely small inorganic nanocrystals, most of which are three-dimensional nanomaterials composed of II-VI or III-V elements. Due to the quantum confinement effect, the transport of electrons and holes inside it is restricted, so that the continuous energy band structure becomes a separated energy level struct...

AI Technical Summary

Problems solved by technology

If the liquid crystal display still adopts the method of attaching a polarizer (POL) on the outside of the glass substrate, then after the backlight passes through the lower polarizer, it will produce linearly polarized light in a specific direction. When the linearly polarized light excites the quantum dots, the original specific The polarization state of the polarized light in the direction will change (depolarization and polarization direction change), thus resulting in uncontrollability of the optical path and brightness

[0005] Then, in order to avoid the above-mentioned problems, the prior art proposes a technical method with a built-in polarizer layer, that is, the polarizer outside the liquid crystal cell is moved between the quantum dot color filter and the liquid crystal layer, so as to avoid the quantum dot color filter The light sheet causes the polarization state of the light to change, but the solution of building the polarizer is very complicated, the manufacturing process is very difficult, and there are difficulties in the actual operation. For this reason, the existing technology also proposes a solution of placing the quantum dot color filter outside. That is, the quantum dot color filter is set outside the upper polarizer to avoid the change of the polarization state of the light in the liquid crystal cell caused by the quantum dot color filter, which affects the normal light output of the liquid crystal display panel, but the outside of the quantum dot color filter In the scheme, the light is irradiated into the quantum dot color filter after passing through the upper substrate and the upper polarizer, and the horizontal movement distance is relatively large during the light propagation process. Originally, it should correspond to the color crosstalk problem where the light incident on the red light filter area is shifted to the blue light filter area

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