Display Panel Sense-Line Switching for Interference-Free Lighting Tests
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Solution Overview
Problem
In the manufacturing process of display panels, the lighting test for detecting dark spots and other issues is hindered by interference between scanning and data signals, and the design space is occupied by shorting bars and sense lines, limiting the panel's frame design.
Innovation Solution
A manufacturing method that includes forming scan lines, data lines, and sense lines with first and second sensing sections and a switch assembly, allowing for signal isolation during testing and reducing the need for shorting bars, thereby optimizing the panel's design space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If shorting bars and sense lines are arranged in the side area of the display panel, then the lighting test can be performed, but the design space is occupied and the frame design is limited
Solution Approach 1:
The sense lines are designed to serve dual functions: detecting panel breakage and acting as shorting bars during lighting tests. By making the sense lines multi-functional, the patent eliminates the need for separate shorting bars, thereby reducing the occupied design space in the side area while maintaining both testing capabilities
Solution Approach 2:
The patent merges the function of shorting bars with the sense lines by configuring the sense lines to be connected to scan lines and data lines during lighting tests. This combination integrates two previously separate components into one, freeing up design space in the frame area
2Productivity
If scanning signal and data signal are output simultaneously to shorting bars, then all sub-pixels can be lighted up, but signal interference occurs hindering the lighting test
Solution Approach 1:
The patent segments the signal input process by using separate sensing sections for scan lines and data lines. The first sensing section is connected to scan lines and the second sensing section is connected to data lines, allowing signals to be input through isolated paths that reduce interference while maintaining testing capability
Solution Approach 2:
The sensing sections act as intermediary components between the signal sources and the display lines. These intermediaries isolate the scanning and data signals during input, preventing direct interference while still allowing both signals to reach their respective lines for effective lighting tests
Data Source
AI summary
A manufacturing method includes: providing a substrate; forming, in a display area of the substrate, a plurality of lines of scan lines, a plurality of rows of data lines and a plurality of display assemblies; forming, at the periphery of the display area, a sense line including a first sensing section connected to each of the scan lines, a switch assembly and a second sensing section connected in sequence and connected to each of the data lines; inputting a shut-off signal to a control terminal of the switch assembly; inputting a scanning signal to each of the scan lines through the first sensing section and inputting a data signal to each of the data lines through the second sensing section; and disconnecting the scan lines from the first sensing section and disconnecting the data lines from the second sensing section when confirming that each display assemblies is lighted up.