Display Device Signal Line Noise Reduction
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Solution Overview
Problem
Display devices experience noise emission from open-close signal lines connected to analog switches in the signal selection circuit, which affects the performance of the display panel.
Innovation Solution
The display device incorporates a configuration where the first open-close signal line and the second open-close signal line, with different polarities, are connected to the signal selection circuit, with one end of each line free, increasing wire resistance and reducing noise generation. This configuration includes a looped structure for the signal lines, with power supplied from only one side, minimizing noise influence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If open-close signal lines are connected to analog switches in the signal selection circuit, then the circuit can properly control pixel switching, but noise is emitted from the signal lines
Solution Approach 1:
The patent applies asymmetry by making one end of each open-close signal line free (unconnected) rather than creating symmetric looped connections. This asymmetric configuration increases wire resistance and reduces noise emission while maintaining proper circuit operation
Solution Approach 2:
The patent changes the electrical parameters of the signal lines by leaving one end free, which increases the wire resistance. This parameter change reduces the noise emission from the signal lines while maintaining the ability to properly control analog switches
2Reliability
If looped signal line structure is used, then signal distribution is maintained, but noise influence increases
Solution Approach 1:
The patent breaks the symmetric looped structure by leaving one end of each open-close signal line free. This asymmetric modification maintains signal distribution functionality while reducing noise influence by increasing wire resistance
3Ease of operation
If open-close pulse signals of positive and negative polarity are supplied, then analog switches can be properly controlled, but noise is generated from the signal lines
Solution Approach 1:
The patent changes the electrical parameters by leaving one end of the signal lines free, increasing wire resistance. This reduces noise generation from the open-close pulse signals while maintaining proper analog switch control functionality
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively reduces noise emission and ensures proper operation of the signal selection circuit, even if there are disconnections in the open-close signal lines, by increasing wire resistance and providing a write margin for the analog switches.
Implementation Method 1
one end of each line free, increasing wire resistance and reducing noise generation
Data Source
AI summary
According to one embodiment, an RGB image signal is output from a driver, first ends of a first open-close signal line and a second open-close signal line are each connected to the driver and second ends of the first open-close signal line and the second open-close signal line are free. Power is supplied to a signal selection circuit, which selects a signal line and outputs a polarity inverted image signal, via the first open-close signal line and the second open-close signal line.