Touch Display Device With Segmented Touch Blocks

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Solution Overview

Problem

Existing touch display devices with separate touch panels stacked on top of the display panel face issues such as increased thickness, reduced light transmittance, and higher manufacturing costs. Additionally, the increasing number of touch electrodes requires more touch lines and driving circuits, which complicates touch sensing, especially in large-screen displays.

Innovation Solution

The proposed solution involves dividing the display panel into multiple touch blocks, with dedicated touch block lines for driving the blocks and touch electrode lines for driving the electrodes within the blocks. This configuration reduces the number of touch lines required and enhances touch sensing performance by allowing for efficient driving of touch blocks and electrodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the number of touch electrodes is increased to enhance touch performance, then touch sensing performance is improved, but the number of touch lines and touch driving circuits increases, leading to increased device complexity and manufacturing costs

Engineering Contradiction:

Improvetouch sensing performanceVSAvoidnumber of touch lines and driving circuits

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The display panel is divided into multiple touch blocks, with each block containing multiple touch electrodes. This segmentation allows the touch system to be divided into manageable units, reducing the complexity of controlling individual electrodes while maintaining comprehensive touch coverage across the entire display area.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Multiple touch electrodes within the same touch block share common touch lines for signal input and output. By merging the connection paths of multiple electrodes through shared lines, the total number of required touch lines is significantly reduced while still enabling individual electrode sensing capability.

Inventive Principle:

Principle #5Merging (Combining)

2Measurement precision

If the number of touch electrodes is increased to enhance touch performance, then touch sensing performance is improved, but manufacturing costs increase

Engineering Contradiction:

Improvetouch sensing performanceVSAvoidmanufacturing costs

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

Dividing the touch panel into blocks allows for modular manufacturing and testing. Each touch block can be independently manufactured and tested, reducing manufacturing complexity and cost while enabling high-density electrode arrangements that improve touch sensing performance.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

By merging multiple electrode connections into shared touch lines, the overall number of conductive pathways is reduced, simplifying the manufacturing process and reducing material costs while still supporting a large number of touch electrodes for enhanced sensing performance.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If separate touch panel is stacked on display device to provide touch functionality, then touch sensing capability is added, but device thickness increases and light transmittance decreases

Engineering Contradiction:

Improvetouch sensing capabilityVSAvoiddevice thickness

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

The touch electrodes are integrated directly into the display panel structure, merging the touch sensing function with the display structure. This eliminates the need for a separate stacked touch panel, thereby reducing overall device thickness while maintaining full touch sensing capability.

Inventive Principle:

Principle #5Merging (Combining)

4Adaptability or versatility

If separate touch panel is stacked on display device to provide touch functionality, then touch sensing capability is added, but light transmittance decreases

Engineering Contradiction:

Improvetouch sensing capabilityVSAvoidlight transmittance

Core Design Contradiction:

Adaptability or versatilityVSIllumination intensity

Solution Approach 1:

Integrating touch electrodes within the display panel layers allows for optimized material selection and layer configuration that maintains high light transmittance. The merged structure eliminates additional interfaces and materials that would otherwise reduce light transmission, while still providing complete touch sensing functionality.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12321547B2Touch display device

Publication Date: 2025.06.03 LG DISPLAY CO LTD

AI summary

A touch display device and a display panel are disclosed. The touch display device comprises a display panel including touch electrodes arranged into touch blocks, each of the touch blocks including a respective portion of the touch electrodes; touch lines including touch block lines connected to the touch blocks and touch electrode lines connected to the touch electrodes; and a touch driving circuit configured to sense a touch of a touch block from the touch blocks based on a first touch signal received from a touch block line from the touch block lines that is connected to the touch block, and sense a touch of a touch electrode from the touch electrodes included in the touch block based on a second touch signal received from a touch electrode line from the touch electrode lines that is connected to the touch electrode.