Display substrate and display apparatus

By introducing a capacitive coupling structure between the compensation transistor and the data writing transistor in the display substrate of the AMOLED display, and combining multiple transistor types, the problems of insufficient threshold voltage compensation of the driving transistor and difficulty in writing data signals under high frequency display are solved, and the stability of the driving transistor and brightness maintenance under high frequency are achieved.

WO2025059912A9PCT designated stage expired Publication Date: 2026-07-16BOE TECHNOLOGY GROUP CO LTD +2
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BOE TECHNOLOGY GROUP CO LTD
Filing Date
2023-09-20
Publication Date
2026-07-16

AI Technical Summary

Technical Problem

Under high-frequency display conditions, insufficient threshold voltage compensation of the driving transistors in AMOLED displays leads to difficulties in writing data signals, especially when displaying low grayscale and black states, affecting the brightness of subpixels and display effects.

Method used

A display substrate was designed, comprising a compensation transistor and a data writing transistor. The gate of the driving transistor is coupled through a capacitor structure, and threshold compensation and data signal writing are independently controlled. By combining multiple transistor types (such as oxide and low-temperature polysilicon transistors) and a reset signal line, the signal transmission path is optimized to achieve fast data signal writing and stable potential.

Benefits of technology

The threshold voltage of the driving transistor is effectively compensated under high-frequency display conditions, ensuring accurate writing of data signals, improving sub-pixel brightness and display stability, and solving the problems of insufficient threshold voltage compensation and difficulty in writing low grayscale under high-frequency display conditions.

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Abstract

A display substrate and a display apparatus. The display substrate comprises: a base substrate, and a plurality of sub-pixels, a plurality of first scanning lines (GA1), a plurality of second scanning lines (GA2) and a plurality of data lines (DA), which are all arranged on the base substrate. Each sub-pixel comprises a sub-pixel drive circuit, which comprises a drive transistor (T3), a capacitor structure (C2), a compensation transistor (T2) and a data write transistor (T4), wherein gate electrodes (T2-g1, T2-g2) of the compensation transistor (T2) are coupled to corresponding first scanning lines (GA1), a first electrode of the compensation transistor (T2) is coupled to a second electrode of the drive transistor (T3), and a second electrode of the compensation transistor (T2) is coupled to a gate electrode (T3-g) of the drive transistor (T3); and a gate electrode (T4-g) of the data write transistor (T4) is coupled to a corresponding second scanning line (GA2), a first electrode of the data write transistor (T4) is coupled to a corresponding data line (DA), a second electrode of the data write transistor (T4) is coupled to a first end of the capacitor structure (C2), and a second end of the capacitor structure (C2) is coupled to the gate electrode (T3-g) of the drive transistor (T3).
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