Display Panel Mux Signal Blocking for Coupling Prevention
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Solution Overview
Problem
The coupling between mux lines and film lines in display devices leads to line defects and increased power consumption, particularly in OLED displays, due to the overlap of mux signals causing data signal distortion.
Innovation Solution
Incorporating a mux signal blocking part to selectively block mux signals between the mux line and mux pad, preventing coupling and reducing power consumption by controlling mux signal transmission during a lighting test and blocking it after attaching the data driving unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If mux lines are used to reduce the number of output terminals and data link lines, then device complexity is reduced, but coupling occurs between mux lines and film lines causing line defects
Solution Approach 1:
The patent extracts the mux signal transmission function from the test substrate and transfers it to the flexible printed circuit. By removing the mux signal blocking part during final assembly, the harmful coupling effect is eliminated while preserving the simplified terminal structure benefit
Solution Approach 2:
The patent makes the mux signal transmission path dynamic by using a movable blocking part that can be positioned during testing and removed during final operation. This allows the system to adapt its configuration based on the operational phase (testing vs. final use)
2Ease of operation
If mux signals are transmitted during lighting test, then testing capability is improved, but power consumption increases due to continuous signal transmission
Solution Approach 1:
The patent performs preliminary testing with the blocking part in place to identify and fix issues before final assembly. This allows comprehensive testing capability while enabling power savings during final operation by removing the blocking part and eliminating unnecessary signal transmission paths
Solution Approach 2:
The patent discards the mux signal blocking part after the lighting test phase is completed. This removes the source of excessive power consumption during final operation while preserving the testing capability that was exercised during the preliminary phase
3Reliability
If mux signal blocking part is disposed to prevent coupling, then line defect prevention is improved, but device complexity increases
Solution Approach 1:
The patent makes the blocking part movable and removable rather than fixed. This allows the system to have simple structure during final operation (blocking part removed) while providing coupling prevention capability when needed during testing (blocking part installed)
4Use of energy by moving object
If mux signal blocking part is removed, then power consumption is reduced, but coupling may occur during testing
Solution Approach 1:
The patent uses a dynamic blocking part that can be installed during testing to prevent coupling and removed during final operation to reduce power consumption. The system adapts its configuration based on the operational phase
Data Source
AI summary
A display device including a mux signal blocking part and a method of fabricating the same are disclosed. A display device includes: a timing controlling unit generating an image data, a data control signal and a gate control signal; a data driving unit generating a data signal using the image data and the data control signal; a gate driving unit generating a gate signal using the gate control signal; and a display panel displaying an image using the data signal and the gate signal and including a plurality of mux test lines, a plurality of mux enable transistors connected to the plurality of mux test lines, respectively, and a plurality of mux pads connected to the plurality of mux enable transistors, respectively.