Gate Row Driving Circuit Using Thermoelectric Compensation for Pixel Charging

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Solution Overview

Problem

In In-Cell touch technology, particularly in the Long H mode, high temperatures lead to leakage at the Q point, causing insufficient charging of pixels and resulting in horizontal streaks on the display screen.

Innovation Solution

A gate row driving circuit incorporating a thermoelectric module that converts operating heat into compensation power to charge a capacitor, which then superimposes a charging voltage onto the pixel driving voltage, ensuring continuous charging during high-temperature operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If intra-frame touch drive (Long H mode) is used to achieve more accurate touch and shorter response time, then touch precision and response time are improved, but leakage occurs at the Q point during touch stage under high temperatures, causing insufficient charging of pixels and horizontal streaks

Engineering Contradiction:

Improveresponse timeVSAvoiddisplay quality

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent converts the operating heat generated by the driving module during touch operation into compensation power through thermoelectric conversion. The thermoelectric module utilizes the temperature difference created during normal operation to generate electrical energy that compensates for the leakage at the Q point, transforming a harmful effect (heat) into a beneficial one (compensation power for charging)

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The driving module itself generates the compensation power needed to address its own leakage problem through the thermoelectric module. The operating heat from the driving module is converted into compensation power that charges the capacitor module, which then provides the charging voltage to compensate for Q point leakage, creating a self-sustaining system

Inventive Principle:

Principle #25Self-service

2Measurement precision

If intra-frame touch drive (Long H mode) is used to achieve more accurate touch, then touch precision is improved, but leakage at the Q point during touch stage causes insufficient charging of pixels in the next row

Engineering Contradiction:

Improvetouch precisionVSAvoidpixel charging stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The system implements a feedback mechanism where the capacitor module continuously receives compensation power from the thermoelectric module and dynamically adjusts the charging voltage applied to the pixel driving voltage. This feedback loop ensures that the pixel charging remains stable despite the ongoing leakage at the Q point during touch operation

Inventive Principle:

Principle #23Feedback

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution prevents horizontal streaks by maintaining stable pixel charging, thereby improving display quality and extending the life of the display substrate.

Implementation Method 1

a thermoelectric module connected to the driving module, the thermoelectric module is configured to perform thermoelectric conversion on operating heat in response to that the operating heat of the driving module matches preset charging heat to obtain compensation power

Methodology Applied

Scientific EffectThermoelectric conversion: Seebeck Effect

Data Source

PatentUS12387693B2Gate row driving circuit and driving method thereof, and display substrate

Publication Date: 2025.08.12 HKC CORP LTD

AI summary

Disclosed are a gate row driving circuit and a driving method thereof, and a display substrate. The gate row driving circuit includes: an input module; a driving module, configured to connect to a pixel driving voltage output by the input module and provide a pixel power supply voltage to power a current pixel row under drive of the pixel driving voltage; a thermoelectric module, configured to perform thermoelectric conversion on operating heat when the operating heat of the driving module matches preset charging heat to obtain compensation power; and a capacitor module. The driving module is also configured to superimpose a charging voltage continuously generated by the capacitor module onto the pixel driving voltage after the thermoelectric module charges the capacitor module according to the compensation power to obtain an updated pixel driving voltage.