Display substrate, manufacturing method of display substrate and display device

Abstract

The invention discloses a display substrate, a manufacturing method of the display substrate and a display device. The display substrate comprises a first substrate body, a phase delay layer and a first alignment layer. The phase delay layer is located on the first substrate body. The first alignment layer is located on the phase delay layer. The phase delay direction of the phase delay layer is perpendicular to the optical axis direction of liquid crystals. According to the technical scheme, the phase delay direction of the phase delay layer is perpendicular to the optical axis direction of the liquid crystals, and the phase delay amount generated by the liquid crystals is greatly counteracted, so that the serious dark state light leakage phenomenon is avoided, and the contrast ratio is improved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display substrate, a manufacturing method thereof, and a display device. Background technique [0002] For a liquid crystal display (LCD for short), its glass substrate is an isotropic material without phase retardation, so under normal conditions, the liquid crystal display will not produce light leakage. However, when the liquid crystal display is subjected to an external force, the glass substrate will produce anisotropy under pressure, and the direction of the phase retardation produced will be different according to the direction of the force. [0003] The reason for the light leakage in the dark state is explained below by comparing the empty cell and the liquid crystal cell under the action of bending pressure. Figure 1a is a schematic diagram of the phase delay of the empty box under the bending pressure, Figure 1b for Figure 1a Schematic diagram of the light leaka...

AI Technical Summary

Problems solved by technology

The phase retardation directions of the phase retardation generated on the color filter substrate 101 and the array substrate 201 are perpendicular to each other, such as Figure 2c As shown, when the liquid crystal cell is bent under the action of external pressure, the phase retardation generated on the color filter substrate 101 and the array substrate 201 are both 3nm. At this time, the display device is bent under the external pressure, so at a certain wavelength The transmittance (transmittance) of the display device within the range is not 0, so the phase retardation generated by the liquid crystal 3 and the phase retardation generated on the color filter substrate 101 and the array substrate 201 will cause serious dark state light leakage, resulting in a decrease in contrast

[0004] To sum up, when the liquid crystal display device is bent under the action of external force, the amount of phase retardation produced by the liquid crystal 3 will cause serious light leakage in the dark state, resulting in a decrease in contrast

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