Display substrate and manufacturing method therefor

By designing a combined structure of the first and second light shielding parts on the display substrate and filling the second light shielding part of the gap of the light filter unit, the problem of color string and opening rate reduction in liquid crystal display products is solved, and a higher opening rate and lower color string risk is achieved.

WO2025060075A1 Publication Date: 2025-03-27BOE TECHNOLOGY GROUP CO LTD +1
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Patent Information

Application Number
PCT/CN2023/120766
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-22
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Due to the distance between the backlight light source and the light exit side, the color chain problem is caused by the color chain problem. As the pixel density increases, the color chain risk increases. It is necessary to increase the width of the black matrix to reduce the risk of color chain, but this leads to a decrease in the opening rate.

Method used

A display substrate is provided, and its light shielding part structure consists of a first light shielding part extending in the first direction and a second light shielding part extending in the second direction. The second light shielding part fills the gap between adjacent filter units, reduces the roughness of the surface of the filter unit away from the substrate side, reduces the optical path from the backlight to the light exit side, and reduces the color-string effect.

Benefits of technology

By reducing the size of the light shielding part and the thickness of the flat layer, the opening rate of the display substrate is improved, and the risk of color stringing is reduced, the problem of color stringing and opening rate reduction in liquid crystal display products is solved.

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Abstract

A display substrate and a manufacturing method therefor, relating to the technical field of display. The display substrate comprises: a base substrate (16); a first light-shielding portion (141) located on the base substrate (16), the first light-shielding portion (141) extending in a first direction; a plurality of light filtering units and a second light-shielding portion (142) located on the side of the first light-shielding portion (141) distant from the base substrate (16), the plurality of light filtering units being arranged at intervals, the second light-shielding portion (142) filling a gap between every two adjacent light filtering units, the second light-shielding portion (142) extending in a second direction, and the first direction intersecting the second direction; a planarization layer (17) located on the side of the plurality of light filtering units and the second light-shielding portion (142) distant from the base substrate (16); and a spacer (242) located on the side of the planarization layer (17) distant from the base substrate (16). The color cross of the display substrate can be reduced, and the aperture ratio of the display substrate is improved.
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