Display driving circuit, display driving method, and display panel

The display driving circuit and method address display unevenness in OLED panels by compensating for threshold voltage and power supply voltage variations, stabilizing the drive current and enhancing display uniformity through a compensation unit and control signal management.

JP2026520527APending Publication Date: 2026-06-23HKC CORP LTD
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Patent Information

Authority / Receiving Office
JP ยท JP
Patent Type
Applications
Current Assignee / Owner
HKC CORP LTD
Filing Date
2024-04-16
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

OLED display panels suffer from display unevenness due to non-uniformity in threshold voltage and power supply voltage across different transistors, leading to variations in brightness and overall display quality.

Method used

A display driving circuit and method that includes a compensation unit to write and compensate for the threshold voltage and power supply voltage of transistors, using a storage unit, data writing unit, and light emission control units to stabilize the drive current, thereby eliminating the influence of these voltages on display uniformity.

Benefits of technology

The solution effectively stabilizes the drive current, reducing display unevenness by compensating for variations in threshold voltage and power supply voltage, resulting in improved display uniformity and consistency across the panel.

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Abstract

The present invention relates to a display driving circuit (100), a display driving method, and a display panel. The display driving circuit (100) includes a first transistor (110), a memory unit (120), a first light emission control unit (150), a compensation unit (140), a data writing unit (130), and a second light emission control unit (160). The memory unit (120) connects a first node (A) and a second node (B), and the first light emission control unit (150) connects a first light emission control line (350), a power supply high voltage terminal (370), and a first node (A). The compensation unit (140) is connected to the second node (B), the third node (C), the fourth node (D), the first scan line (310), and the reference voltage line; the data writing unit (130) is connected to the first scan line (310), the data line (330), and the third node (C); the second light emission control unit (160) is connected to the second light emission control line (360), the fourth node (D), and the anode of the display light emission unit (200); and the cathode of the display light emission unit (200) is connected to the power supply low voltage terminal (380). By compensating the threshold voltage (Vth) and the power supply voltage (Vdd) with the compensation unit (140), the influence of the threshold voltage (Vth) and the power supply voltage (Vdd) on the drive current is eliminated, and the problem of uneven display on the display panel is improved.
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