OLED Display Timing Controller Noise Resilience

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Solution Overview

Problem

OLED displays experience malfunctions due to external noise affecting communication between a set part and a display module, especially when they are separated by a predetermined distance or longer, leading to disconnection and inability to resume communication.

Innovation Solution

Incorporating a timing controller in the set part to control reset signals and manage safety modes, including receiving pulse signals from the display module, determining voltage levels, and performing HDCP encoding and decoding operations to prevent abnormal safety mode maintenance caused by external noise, thereby ensuring normal operation and communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the display module is separated from the set part by a predetermined distance or longer, then the thickness of the display module can be reduced and the device can be made thinner, but external noise affects the cable causing communication failures and safety mode malfunctions

Engineering Contradiction:
Improvethickness of display moduleVSAvoidcommunication stability
Core Design Contradiction:
Volume of moving objectVSReliability

Solution Approach 1:

The timing controller proactively monitors communication status by receiving periodic pulse signals from the display module. When communication failure is detected (pulse signal not received for set time), the controller preemptively transmits reset signals to prevent abnormal safety mode maintenance, rather than waiting for the safety mode to be triggered by noise interference

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system implements continuous feedback monitoring through periodic pulse signals exchanged between the display module and timing controller. The timing controller monitors whether pulse signals are received within expected time intervals, and based on this feedback, dynamically decides whether to transmit reset signals, creating a closed-loop communication status monitoring system

Inventive Principle:
Principle #23Feedback

2Adaptability or versatility

If a cable is used to connect the display module and set part when separated by a predetermined distance, then the display module can be positioned flexibly, but external noise on the cable causes safety mode to be abnormally maintained

Engineering Contradiction:
Improvepositioning flexibilityVSAvoidexternal noise interference
Core Design Contradiction:
Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The timing controller acts as an intermediary between the set part and display module, mediating communication by monitoring pulse signals and transmitting reset signals when needed. This intermediary function isolates the system from external noise effects by adding active monitoring and correction layers in the communication path

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system changes the operational parameters of the cable communication by introducing periodic pulse signals with specific timing characteristics. By monitoring the presence and timing of these pulse signals, the system can detect communication degradation caused by external noise and adjust by transmitting reset signals to restore normal operation

Inventive Principle:
Principle #35Parameter changes

3Reliability

If communication failure occurs due to external noise, then encoding and decoding operations conforming to HDCP standard are performed for content protection, but communications cannot be resumed when external noise is consistently generated

Engineering Contradiction:
Improvecontent protectionVSAvoidcommunication recovery time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The timing controller performs preliminary monitoring of communication status through periodic pulse signals before HDCP encoding and decoding operations are affected. When communication failure is detected early (before consistent external noise completely disrupts communication), the controller preemptively transmits reset signals to prevent prolonged safety mode activation, reducing the time loss while maintaining content protection through HDCP operations

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS10522091B2Organic light-emitting diode display and operation method thereof
Publication Date: 2019.12.31 LG DISPLAY CO LTD
  • US10522091B2 patent drawing
  • US10522091B2 patent drawing
  • US10522091B2 patent drawing

AI summary

An OLED display and an operation method thereof, which are capable of preventing malfunctions caused by the influence of external noise on an extended cable when a display panel is separated from a set part by a predetermined distance or longer, are discussed. The OLED display includes a timing controller embedded in the set part separated from the display module by a predetermined distance and configured to control a reset signal for cancelling a safety mode to be transmitted to the display module in order to prevent the safety mode from being abnormally maintained due to the influence of external noise on a cable used to connect the display module and the set part when the safety mode for displaying a black screen is executed, to thereby prevent the display from continuously executing the safety mode to consistently display the black screen.