Display Panel Data Line Reuse for Narrow Border Design
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Solution Overview
Problem
Conventional display panels require additional signal lines for testing, which hinders the design of narrow borders due to the need for separate signal lines connecting the test pin and test switching circuit, increasing the border width and potentially leading to inefficient use of space.
Innovation Solution
The display panel reuses data lines as signal lines for test pins, allowing the test signal to be provided through existing data lines, eliminating the need for additional signal lines in the border region, thereby reducing the border width and enabling a narrow border design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additional signal lines are arranged in the border region to connect test pins with test switching circuit, then test function can be implemented, but border width increases
Solution Approach 1:
The data lines are designed to serve dual purposes: they function as data transmission lines during normal display operation and as signal lines for connecting test pins to the test switching circuit during testing. This multi-functionality eliminates the need for separate dedicated signal lines in the border region, thereby reducing border width while maintaining complete test functionality.
2Length of stationary object
If data lines are reused as signal lines for test pins, then border width is reduced, but potential interference with data transmission may occur
Solution Approach 1:
The testing operation is performed periodically or at specific stages (such as before drive chip binding) rather than continuously. During normal display operation, data lines function exclusively as data transmission lines. When testing is required, the system switches to test mode where selected data lines serve as signal lines. This time-division approach ensures that data transmission and testing do not interfere with each other, maintaining signal transmission reliability while enabling border reduction.
Data Source
AI summary
Provided are a display panel, an electronic device and a test method. The display panel includes: multiple data lines extending in a first direction; a display array including multiple pixel units arranged in an array, where the columns of the pixel units are electrically connected to the data lines respectively; a test switching circuit arranged at one side of the display array and test pins and a drive pin arranged at the other side of the display array in the first direction, where the test switching circuit includes a control end, input ends and output ends, the drive pin is connected to the control end, the test pins are configured to input a test signal and are connected to the input ends via a portion of the data lines, and the remaining data lines are connected to the output ends.