Gate Driving Circuit Frequency Division for Multi-Rate OLED Refresh

Solution Overview

Problem

Existing OLED display panels cannot achieve different refresh rates for different areas, limiting their usage scenarios.

Innovation Solution

A gate driving module with a frequency division signal line and cascaded gate driving circuits, including stage transmission and output frequency division control units, allows for independent control of refresh rates in different display areas by adjusting frequency division control signals.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a gate driving circuit outputs effective pulses step by step to sequentially activate multiple rows of sub pixels, then the gate driving circuit can drive the display panel, but the refresh rate of the entire display area is the same, making it impossible to drive different areas with different refresh rates

Engineering Contradiction:

Improvedifferent refresh rates for different areasVSAvoidgate driving circuit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The gate driving circuit is divided into multiple independent gate driving circuits, each capable of operating at different refresh rates. Each gate driving circuit includes a stage transmission unit, an output unit, a stage transmission frequency division control unit, and an output frequency division control unit, allowing independent control of different display areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces frequency division control units that can dynamically adjust the refresh rate of each gate driving circuit based on control signals. The stage transmission frequency division control unit and output frequency division control unit can independently control the timing and frequency of effective pulses for different areas, enabling dynamic adaptation to different refresh rate requirements.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the refresh rate of the entire display area is the same, then the gate driving circuit operation is simple, but it is impossible to drive different areas with different refresh rates, resulting in limited usage scenarios

Engineering Contradiction:

Improveusage scenariosVSAvoidgate driving control

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent introduces frequency division control units as intermediary components between the control signal and the gate driving output. These control units include a stage transmission frequency division control unit and an output frequency division control unit, which mediate the control signals to achieve different refresh rates for different areas while maintaining manageable operation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If frequency division control units are added to enable different refresh rates for different areas, then adaptability is improved, but the gate driving circuit structure becomes more complex

Engineering Contradiction:

Improvedifferent refresh rates for different areasVSAvoidgate driving circuit structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The gate driving circuit is divided into multiple independent gate driving circuits, each capable of operating at different refresh rates. Each gate driving circuit includes a stage transmission unit, an output unit, a stage transmission frequency division control unit, and an output frequency division control unit, allowing independent control of different display areas.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces frequency division control units that can dynamically adjust the refresh rate of each gate driving circuit based on control signals. The stage transmission frequency division control unit and output frequency division control unit can independently control the timing and frequency of effective pulses for different areas, enabling dynamic adaptation to different refresh rate requirements.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20260087995A1Gate driving modules and display panels

Publication Date: 2026.03.26 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

A gate driving module and a display panel, including a plurality of cascaded gate driving circuits. each of the gate driving circuits includes a stage transmission unit, an output unit, a stage transmission frequency division control unit, and an output frequency division control unit. The stage transmission frequency division control unit controls a stage transmission output unit to output the current-stage stage transmission signal based on the signals from the third node and one of the first node and the second node. The output frequency division control unit controls the signal from the third node based on the frequency division control signal to control the output unit to output a current-stage gate control signal.