Touch Display Panel Driver Chip Segmentation for Cell State Testing

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Solution Overview

Problem

It is difficult to perform touch fake press tests on touch display panels when they are in a cell state, as the direct bonding of driver chip pins to the lower borders of the panels makes it inconvenient.

Innovation Solution

A touch display panel design that includes a substrate with touch electrodes and touch traces, a driver chip with separate output terminals for display and touch functions, and detecting lines extending from the driver chip away from the touch electrodes, allowing for convenient touch fake press tests in a cell state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If driver chip pins are directly bonded to lower borders of touch display panels, then production cost is reduced, but touch fake press tests cannot be carried out in cell state

Engineering Contradiction:

Improveproduction costVSAvoidtouch fake press test convenience

Core Design Contradiction:

Ease of manufactureVSEase of operation

Solution Approach 1:

The driver chip is functionally segmented into display output terminals and touch output terminals, with the touch output terminals positioned on the second side edge away from touch electrodes. This segmentation allows independent access to touch function terminals for testing purposes while maintaining the integrated chip structure for cost efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Detecting lines are introduced as intermediary elements that extend from the touch output terminals along the driver chip away from the touch electrodes. These detecting lines serve as test access pathways, enabling fake press tests to be performed on panels in cell state without requiring direct bonding of the driver chip.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If driver chip is integrated with touch function and display function, then production cost is saved, but testing convenience in cell state is reduced

Engineering Contradiction:

Improveproduction costVSAvoidtouch function testing difficulty

Core Design Contradiction:

Ease of manufactureVSDifficulty of detecting and measuring

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The detecting lines extend in a spatial dimension along the driver chip away from the touch electrodes, creating a separate test access pathway. This dimensional separation allows testing operations to be performed independently of the main display function integration, resolving the testing difficulty while maintaining integration benefits.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS12254144B2Touch display panel and display device

Publication Date: 2025.03.18 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD

AI summary

The present application discloses a touch display panel and a display device. In the touch display panel, a driver chip includes a plurality of first output terminals and a plurality of second output terminals; the first output terminals output display signals during a display stage, and the second output terminals are connected to touch traces in a one-to-one correspondence. Each of detecting lines is connected to an end of a corresponding one of the touch traces close to the driver chip, and a plurality of the detecting lines extend from two sides of the driver chip along a direction of the driver chip away from touch electrodes.