Display Timing Controller Clock Tuning for RF Interference Mitigation

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Solution Overview

Problem

Devices with both a display and a wireless transceiver suffer from interference between the display's timing controller and wireless communication, particularly affecting WWAN and Wi-Fi performance, especially in 5G ultra-low band transmissions.

Innovation Solution

Adapting the T-Con clock frequency based on the active radiofrequency band to minimize interference by dynamically changing the P2P clock frequency using an RF interference management policy manager.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the display's timing controller operates at fixed frequency, then the display function is stable, but wireless communication performance deteriorates due to interference

Engineering Contradiction:

Improvedisplay function stabilityVSAvoidwireless communication interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies dynamics by making the timing controller's operating frequency adjustable rather than fixed. The system dynamically changes the P2P clock frequency based on the active radiofrequency band, allowing the display controller to adapt its operation to minimize interference with wireless communications while maintaining display functionality.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the operating parameter (frequency) of the timing controller based on wireless communication requirements. By selecting different frequencies for the P2P clock depending on the active radiofrequency band, the system resolves the contradiction between display stability and wireless interference by adjusting the frequency parameter dynamically.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If radiofrequency absorbers are used to reduce interference, then wireless communication performance improves, but device complexity and cost increase

Engineering Contradiction:

Improvewireless communication interferenceVSAvoidadditional components

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent replaces the physical approach (radiofrequency absorbers) with a computational/software-based approach. Instead of adding physical components to absorb interference, the system uses frequency selection algorithms and clock management software to dynamically adjust the timing controller's frequency, eliminating the need for additional hardware components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediary layer of frequency selection and clock management between the timing controller and the display output. This intermediary software layer mediates the conflict by selecting appropriate frequencies that minimize interference, avoiding the need for physical interference-blocking components.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the timing controller frequency is changed to avoid interference, then wireless communication performance improves, but display timing accuracy may be affected

Engineering Contradiction:

Improvewireless communication interferenceVSAvoiddisplay timing accuracy

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The patent implements feedback mechanisms to monitor wireless communication status and adjust the timing controller frequency accordingly. The system receives feedback about the active radiofrequency band and automatically selects appropriate frequencies, ensuring that timing accuracy is maintained while minimizing interference through continuous monitoring and adjustment.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12488731B2Display timing controller and method

Publication Date: 2025.12.02 INTEL CORP

AI summary

A device includes a processor that is configured to determine a band used for wireless communication by a baseband modem; select an operational frequency for a display controller based on the determined band; and control the display controller to operate at the selected operational frequency.