Display Panel Border Circuit Reuse for Narrow Bezels

Solution Overview

Problem

Existing display panels face challenges with large border areas due to numerous signal lines, such as test and common voltage signal lines, which hinder narrow border design and reduce the utilization rate of test signal lines post-visual testing.

Innovation Solution

The test signal line is electrically connected to both the data signal line during testing and the common voltage signal line during use, allowing it to transmit test signals and compensate for voltage fluctuations, thereby reducing the border area and improving signal line utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If test signal lines and common voltage signal lines are separately arranged in the border area, then the display panel can perform visual testing and maintain voltage stability, but the border area becomes larger

Engineering Contradiction:

Improvevisual testing capabilityVSAvoidborder area

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The test signal line is configured to serve dual purposes: during the test stage, it transmits test signals to the data signal line for visual testing; during the use stage, it transmits common voltage signals to compensate for voltage drops. This multi-functionality eliminates the need for separate dedicated lines, reducing border area while maintaining both testing capability and voltage stability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the function of the test signal line with the common voltage signal line by allowing the test signal line to also carry common voltage signals during the use stage. This consolidation reduces the total number of signal lines required in the border area, directly addressing the contradiction between reliability and border area size

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If test signal lines are arranged in the border area, then visual testing can be performed, but the test signal lines become idle after testing and occupy unnecessary space

Engineering Contradiction:

Improvevisual testing capabilityVSAvoidsignal line utilization rate

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The test signal line is designed to be multi-functional: it performs visual testing during the test stage and transitions to transmitting common voltage signals during the use stage. This ensures continuous utilization of the signal line, eliminating idle capacity and improving overall system adaptability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent ensures the test signal line remains continuously useful by transitioning its function from test signal transmission to common voltage signal transmission after the visual test is completed. This continuous utilization eliminates waste and improves the versatility of the signal line across different operational stages

Inventive Principle:

Principle #20Continuity of useful action

3Reliability

If multiple signal lines are arranged in the border area, then testing and voltage stability can be maintained, but the border design cannot achieve narrow dimensions

Engineering Contradiction:

Improvevoltage stabilityVSAvoidborder width

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The test signal line is configured to serve dual purposes: during the test stage, it transmits test signals to the data signal line for visual testing; during the use stage, it transmits common voltage signals to compensate for voltage drops. This multi-functionality eliminates the need for separate dedicated lines, reducing border area while maintaining both testing capability and voltage stability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent merges the function of the test signal line with the common voltage signal line by allowing the test signal line to also carry common voltage signals during the use stage. This consolidation reduces the total number of signal lines required in the border area, directly addressing the contradiction between reliability and border area size

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250357221A1Display panel, display device, and preparation method and use method thereof

Publication Date: 2025.11.20 XIAMEN TIANMA OPTOELECTRONICS CO LTD

AI summary

Embodiments of the present disclosure provide a display panel, a display device, a preparation method and a use method thereof, where the display panel includes a display area and a border area that surrounds the display area; in which the display area includes a data signal line; and the border area includes a test signal line and a common voltage signal line, which extend around the display area; and the test signal line is configured so that: in a test stage of the display panel, the test signal line is electrically connected to the data signal line and is input with a test signal; and in a use stage of the display panel, the test signal line is electrically connected to the common voltage signal line and is input with a first common voltage signal or outputs a second common voltage signal on the common voltage signal line.