Display substrate and manufacturing method therefor, display device

By setting a separation structure between adjacent portions of the light efficiency enhancement layer on the side of the color filter layer away from the substrate in the OLED display substrate, the fabrication process is simplified, the risk of color filter layer breakage and separation is reduced, and the reliability of the display substrate is improved.

CN116347919BActive Publication Date: 2026-05-26BOE TECHNOLOGY GROUP CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BOE TECHNOLOGY GROUP CO LTD
Filing Date
2023-04-21
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

The current OLED display substrate manufacturing process uses a large number of photomasks, which leads to complex processes and low reliability. In particular, on flexible substrates, the color filter layer is prone to breakage and separation.

Method used

Between adjacent portions of the light-enhancing layer on the side of the color filter layer facing away from the substrate, other structures are used to separate them, and the light-enhancing portion and the adjacent gap are covered on the orthogonal projection of the color filter layer, which simplifies the fabrication process and improves reliability.

Benefits of technology

This reduces the number of photomasks used, lowers the risk of color filter layer breakage and separation, and improves the reliability and fabrication efficiency of the display substrate.

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    Figure CN116347919B_ABST
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Abstract

This application provides a display substrate, a fabrication method thereon, and a display device. The display substrate includes a substrate, a light-emitting structure layer on the substrate, a light-efficiency enhancement layer on a side of the light-emitting structure layer opposite to the substrate, a color filter layer on a side of the light-efficiency enhancement layer opposite to the substrate, and a light-absorbing layer on a side of the color filter layer opposite to the substrate. The light-emitting structure layer includes a plurality of sub-pixels. The light-efficiency enhancement layer includes a plurality of spaced-apart light-efficiency enhancement portions; the orthographic projection of one light-efficiency enhancement portion onto the substrate covers the orthographic projection of one sub-pixel onto the substrate. The orthographic projection of the color filter layer onto the substrate covers the orthographic projection of the light-efficiency enhancement portion onto the substrate. The light-absorbing layer includes a plurality of spaced-apart light-absorbing portions; at least a portion of the orthographic projection of the light-absorbing portion onto the substrate covers the gap between the orthographic projections of adjacent sub-pixels onto the substrate. The display device includes the display substrate.
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