Display Panel Crack Detector Using Switched Data Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As the resolution of display devices increases, cracks in the display panel can adversely affect performance due to the concentration of conductive lines and patterns in a narrow space, making it difficult to detect defects effectively in existing technologies.
Innovation Solution
A crack detector is introduced that uses a plurality of crack detection switches to connect and disconnect data lines, supplying a detection control signal to determine if a crack is present by comparing output signals with a preset reference value, allowing for accurate crack detection within a short time interval during the vertical blank period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the resolution of display devices is increased, then the degree of integration of pixels is improved, but the risk of cracks affecting performance increases due to concentration of conductive lines in narrow space
Solution Approach 1:
The patent applies preliminary action by performing crack detection during the vertical blank period before normal display operation begins. The detection control signal is supplied in advance to connect data lines through crack detection switches, allowing cracks to be identified before they can affect display performance. This proactive approach ensures that potential reliability issues are addressed before they compromise the integrated pixel structure.
2Measurement precision
If crack detection is performed across the entire display panel, then detection coverage is improved, but the detection time required increases
Solution Approach 1:
The patent implements periodic action by utilizing the vertical blank period for crack detection operations. During this brief interval when no display data is being scanned, the detection control signal is supplied to activate crack detection switches and perform measurements across all data lines. This periodic timing allows comprehensive detection coverage without interfering with normal display operation, as the entire panel is checked during the natural refresh cycle gap.
Solution Approach 2:
The patent uses an intermediary approach by introducing crack detection switches that can be selectively connected to data lines based on detection needs. These switches act as intermediaries between the data lines and the detection circuitry, allowing the system to connect only the necessary data lines for detection during the vertical blank period. This selective connection mechanism enables full panel coverage while minimizing detection time by avoiding continuous monitoring of all lines simultaneously.
3Measurement precision
If crack detection switches are used to connect data lines, then detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent applies universality by designing crack detection switches that can be integrated into existing data line structures without requiring separate dedicated detection lines for each data line. The same data lines used for normal display operation are also utilized for crack detection by simply activating the detection switches during the vertical blank period. This multi-functional use of existing infrastructure improves detection accuracy while avoiding the complexity of building entirely separate detection circuits for each data line.
Data Source
AI summary
A crack detector may include a plurality of crack detection switches for connecting and disconnecting data lines of a display panel to one another. A signal supply may supply a detection control signal for controlling opening/closing of the crack detection switches and supply a crack detection signal to a first data line. A crack determiner may be configured to determine a crack of the display panel by comparing an output signal supplied from a second data line connected to the first data line through one of the crack detection switches, with a preset reference value.