Touch Display Drive Circuit Partitioning for High Refresh Rates

Solution Overview

Problem

The existing touch display technologies face challenges in achieving high refresh rates due to the alternation of touch signals and display drive signals, which increases the single refresh duration, making it difficult to meet the growing display and touch requirements.

Innovation Solution

A touch display drive circuit and method that divides the display panel into multiple partitions, using multiplex selection modules to write display signals to one partition while simultaneously writing touch signals to other partitions, allowing for concurrent processing without extending the refresh duration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If touch signal and display drive signal are input alternately at a time, then the touch screen sensor can be driven independently, but the single refresh duration is greatly increased

Engineering Contradiction:

Improveindependent driving capabilityVSAvoidrefresh duration

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of moving object

Solution Approach 1:

The display panel is divided into multiple partitions (first partition, second partition, etc.), and the common electrode is correspondingly divided into multiple partitions. Each partition can be driven independently through separate drive circuits, allowing parallel processing of touch and display signals across different partitions, thus reducing the overall refresh duration while maintaining independent driving capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements continuous concurrent operation by allowing touch signal writing and display signal writing to occur simultaneously in different partitions. The drive circuit continuously alternates between writing touch signals to one partition and display signals to another partition, ensuring that useful actions (signal writing) continue without interruption across the entire display panel, thereby reducing the single refresh duration.

Inventive Principle:

Principle #20Continuity of useful action

2Adaptability or versatility

If touch signal and display drive signal are input alternately at a time, then the touch screen sensor can be driven independently, but the refresh rate cannot meet high refresh requirements

Engineering Contradiction:

Improveindependent driving capabilityVSAvoidrefresh rate

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The display panel is divided into multiple partitions (first partition, second partition, etc.), and the common electrode is correspondingly divided into multiple partitions. Each partition can be driven independently through separate drive circuits, allowing parallel processing of touch and display signals across different partitions, thus reducing the overall refresh duration while maintaining independent driving capability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements continuous concurrent operation by allowing touch signal writing and display signal writing to occur simultaneously in different partitions. The drive circuit continuously alternates between writing touch signals to one partition and display signals to another partition, ensuring that useful actions (signal writing) continue without interruption across the entire display panel, thereby reducing the single refresh duration.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS12118162B1Touch display drive circuit, drive method and touch display panel

Publication Date: 2024.10.15 HKC CORP LTD

AI summary

A touch display drive circuit, a drive method and a touch display panel. The display panel includes: M rows and N columns of touch display units; the M rows and N columns of touch display units form K partitions along a column direction, and each partition includes m rows and N columns of touch display units; the touch display drive circuit includes a control module and M×N multiplex selection modules. By dividing the display panel into a plurality of partitions and providing a multiplex selection module for each touch display unit, the touch signal can be written into other partitions while controlling the display be written into one partition.