Selective Touch Electrode Driving in Display Panels

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Solution Overview

Problem

Existing display devices with light emitting diodes (LEDs) face challenges in efficient touch driving, leading to high power consumption and instability during touch operations.

Innovation Solution

A display device with sub-touch driving areas and a driving circuit that supplies a touch driving signal to only a part of the touch electrodes, allowing switching between driving modes to optimize power usage and stability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If touch driving signals are supplied to all touch electrodes, then complete touch coverage is achieved, but power consumption increases

Engineering Contradiction:

Improvetouch driving stabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The display area is divided into multiple sub-touch driving areas, and touch driving signals are supplied selectively to specific sub-areas rather than uniformly to all areas. This segmentation allows the system to activate only the necessary portions of touch electrodes, reducing overall power consumption while maintaining reliable touch detection in active regions.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of activating all touch electrodes simultaneously, the system applies touch driving signals to only a partial set of electrodes based on display content requirements. This partial action approach reduces energy consumption by avoiding unnecessary activation of touch electrodes in areas where touch interaction is not needed.

Inventive Principle:

Principle #16Partial or excessive action

2Ease of operation

If touch driving is performed continuously, then touch responsiveness is maintained, but power consumption increases

Engineering Contradiction:

Improvetouch responsivenessVSAvoidpower consumption

Core Design Contradiction:

Ease of operationVSUse of energy by moving object

Solution Approach 1:

Touch driving is performed periodically or intermittently based on display frame updates rather than continuously. The touch driving signals are synchronized with display refresh cycles, maintaining touch responsiveness at critical moments while reducing power consumption during periods when full touch driving is not necessary.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The touch driving system dynamically adjusts its operation based on display content and user interaction states. Touch driving signals are activated only when needed for specific display frames or when touch events are detected, allowing the system to maintain responsiveness while minimizing energy consumption during static or non-interactive periods.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20260029869A1Display device

Publication Date: 2026.01.29 LG DISPLAY CO LTD

AI summary

A display device can include a plurality of sub-touch driving areas disposed in a display area, a plurality of row lines arranged in each of the plurality of sub-touch driving areas, and a driving circuit corresponding to the plurality of sub-touch driving areas. The driving circuit supplies a touch driving signal to a plurality of row lines arranged in a target sub-touch driving area selected from among the plurality of sub-touch driving areas during a touch driving, thereby implementing the low-power driving.