Light-emitting unit driving circuit and method, pixel circuit, and display apparatus

By designing a driving circuit for the light-emitting unit that uses alternating driving transistors and selection switches, the problem of low lifespan of the driving transistors was solved, the service life of the driving transistors was extended, and the stability of the light-emitting unit was improved.

WO2026144611A1PCT designated stage Publication Date: 2026-07-09HKC CORP LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
HKC CORP LTD
Filing Date
2025-11-19
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Traditional light-emitting unit driving circuits have a short lifespan for the driving transistors, especially in complex environments where the aging cycle is shortened, leading to a decrease in service life.

Method used

The light-emitting unit driving circuit design includes a first driving transistor, a second driving transistor, a light-emitting switch, a reset switch, a data switch, a first gating switch, a second gating switch, and a flip circuit. By using alternating driving transistors and gating switches, the operating time of each driving transistor is reduced, and its service life is improved.

Benefits of technology

By using alternating drive transistors and gating switches, the lifespan of the drive transistors is extended, the operating time of each drive transistor is reduced, and the stability and durability of the light-emitting unit are improved.

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Abstract

A light-emitting unit driving circuit (10) and method, a pixel circuit (101), and a display apparatus. The light-emitting unit driving circuit (10) comprises a first driving transistor (SD1), a second driving transistor (SD2), a light emission switch (11), a reset switch (12), a data switch (13), a first selector switch (14), a second selector switch (15), and a toggle circuit (16). In a reset period (t1) of each frame, a reset signal (Vint) is written to perform circuit reset, while the toggle circuit (16) is triggered to switch an output level, thereby triggering the first selector switch (14) and the second selector switch (15) to be alternately turned on during frame switching. In a data writing period (t2) of each frame, a data signal (Data) is written and is selectively output to one of the driving transistors by means of a corresponding selector switch, the corresponding driving transistor being triggered by the data signal (Data) to generate a current signal. In a light emission period (t3), the current signal is output to a light-emitting unit (20) by means of the light emission switch (11). In adjacent frames, the driving transistors that generate current signals operate alternately, thereby reducing the operating time of each driving transistor and prolonging the service life.
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