Gate Driving Circuit with Shared Control Stages for Stable Phase Alignment

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Solution Overview

Problem

Existing display devices face challenges in stabilizing the output of gate signals due to variations in voltage levels and phase shifts, leading to inconsistent performance.

Innovation Solution

A driving circuit design that includes multiple stage groups, each comprising a control stage and output stages, where the control stage controls voltages of shared nodes and outputs signals based on phase-shifted clock signals, ensuring stable and synchronized gate signal generation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If multiple output stages share a common control stage to reduce circuit complexity, then device complexity is reduced, but voltage level variations and phase shifts cause unstable gate signal output

Engineering Contradiction:

Improvecircuit complexityVSAvoidgate signal stability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent divides the gate driving circuit into multiple stage groups, where each stage group contains its own control stage and output stages. This segmentation isolates the voltage control functions, preventing voltage level variations in one stage group from affecting others, thereby stabilizing gate signal output while maintaining modular circuit complexity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control stage performs preliminary voltage adjustment and stabilization before signals are transmitted to output stages. By pre-controlling voltage levels and timing at the control stage, the circuit compensates for potential phase shifts and voltage variations before they propagate through the output stages, ensuring stable gate signal generation

Inventive Principle:

Principle #10Preliminary action

2Productivity

If clock signals are phase-shifted to drive multiple output stages sequentially, then productivity is improved through parallel processing, but measurement precision of timing and phase alignment deteriorates

Engineering Contradiction:

Improvesignal processing throughputVSAvoidphase alignment accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent incorporates feedback mechanisms where the control stage monitors the timing and voltage levels of clock signals driving multiple output stages. This feedback enables real-time adjustment of phase shifts and voltage levels, maintaining precise timing alignment even when processing multiple signals in parallel, thus preserving both productivity and measurement precision

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS20250372045A1Driving circuit and electronic device comprising the same

Publication Date: 2025.12.04 SAMSUNG DISPLAY CO LTD

AI summary

According to one or more embodiments, a driving circuit includes a plurality of stage groups and each of the plurality of stage groups includes a control stage and a plurality of output stages connected to the control stage. The control stage controls voltages of a first node and a second node, and each of the plurality of output stages is connected to the first node and the second node to share the control stage and outputs an output signal according to the voltages of the first node and the second node.