Pixel Clock Frequency Shifting for Wireless Interference
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Solution Overview
Problem
Current information handling systems face interference issues due to pixel clock harmonics from displays interacting with wireless carrier bands, leading to connectivity problems, as existing methods only partially reduce noise and may adversely affect wireless connections, especially in systems requiring higher pixel clock frequencies.
Innovation Solution
A method is introduced to detect the identifier associated with a wireless card in an information handling system, selecting a timing descriptor from an Extended Display Identification Data (EDID) file to set the pixel clock frequency, shifting it to non-interfering bands based on geographic region, thereby avoiding interference with wireless carrier bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel clock frequency is increased to avoid wireless carrier band interference, then wireless connectivity is improved, but display noise and harmonic interference increase
Solution Approach 1:
The system dynamically adjusts the pixel clock frequency based on detected wireless carrier bands. The pixel clock is not fixed but is modified in real-time to avoid interfering with wireless communications, allowing the system to adapt to different wireless environments and resolutions while maintaining both display quality and wireless connectivity
Solution Approach 2:
The invention changes the pixel clock frequency parameter to specific values that avoid wireless carrier bands. By selecting from predefined frequency values or dynamically adjusting the frequency, the system eliminates harmonic interference with wireless communications while maintaining acceptable display performance
2Object-generated harmful factors
If pixel clock frequency is decreased to reduce harmonic noise, then display noise is reduced, but wireless carrier band interference increases
Solution Approach 1:
The system implements feedback by detecting the presence and frequency of wireless carrier bands, then using this information to adjust the pixel clock frequency accordingly. This closed-loop approach ensures that the pixel clock is always set to a value that avoids interfering with active wireless communications
Solution Approach 2:
The pixel clock frequency is made dynamic rather than static, allowing the system to respond to changing wireless environment conditions. The frequency is adjusted based on real-time detection of wireless carrier bands, ensuring both noise reduction and wireless connectivity maintenance
3Stability of the object's composition
If fixed pixel clock frequency is used for display operation, then display stability is maintained, but interference with wireless carrier bands occurs
Solution Approach 1:
The system transitions from a fixed pixel clock frequency to a dynamic frequency selection mechanism. The pixel clock frequency is selected from multiple possible values based on detected wireless carrier bands, maintaining display stability while avoiding wireless interference through intelligent frequency selection
Solution Approach 2:
The pixel clock frequency parameter is changed from a fixed value to a selectable range of values. The system chooses the appropriate frequency based on wireless environment detection, allowing the parameter to adapt while maintaining display operation stability
Data Source
AI summary
A method of setting a pixel clock frequency for a display of an information handling system (IHS) is disclosed whereby the method includes detecting an identifier associated with a wireless card operable for use with the IHS. The method also includes selecting a timing descriptor, the timing descriptor associated with a display setting and wherein the timing descriptor corresponds to the identifier. The method further includes setting the pixel clock frequency based on the timing descriptor selected.