Display Device Timing Controller Inversion Scheme Coordination

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Solution Overview

Problem

High-resolution display devices, such as those with 5K3K resolution, require multiple timing controllers to manage image quality, leading to inconsistencies in image quality due to different inversion schemes used by individual controllers, resulting in degraded display performance.

Innovation Solution

A display device with a first and second timing controller that detect problem patterns in image data and adjust the inversion scheme accordingly, ensuring consistent image quality across the display panel by coordinating the operation of both controllers through a shared inversion control signal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If multiple timing controllers are used to control high-resolution display devices, then the display device can handle higher resolution requirements, but image quality consistency deteriorates due to different inversion schemes used by individual controllers

Engineering Contradiction:
Improveresolution handling capabilityVSAvoidimage quality consistency
Core Design Contradiction:
Extent of automationVSReliability

Solution Approach 1:

The patent merges the inversion scheme control into a unified decision-making process by having timing controllers share detection results and coordinate their operations. When problem patterns are detected, controllers exchange information and apply consistent inversion schemes across all display areas, eliminating the previous issue of independent and conflicting inversion decisions.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent implements feedback mechanisms where timing controllers detect problem patterns in image data and provide this information to other controllers. This feedback loop ensures that all controllers are aware of the same image characteristics and can coordinate their inversion schemes accordingly, maintaining image quality consistency across the entire display panel.

Inventive Principle:
Principle #23Feedback

2Extent of automation

If a new timing controller is developed for 5K3K resolution, then the display device can achieve high-resolution performance, but development cost and time increase

Engineering Contradiction:
Improveresolution handling capabilityVSAvoiddevelopment time
Core Design Contradiction:
Extent of automationVSLoss of time

Solution Approach 1:

The patent segments the timing control function into multiple independent timing controllers, each responsible for specific display areas. This segmentation allows the system to handle high resolution by dividing the control task rather than requiring a completely new controller design, thereby reducing development time and costs while maintaining high-resolution performance.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent makes timing controllers universal by designing them to handle multiple display areas and coordinate with other controllers through shared protocols. This multi-functionality allows existing controller designs to be reused for high-resolution applications, eliminating the need for entirely new controller development and reducing both time and cost.

Inventive Principle:
Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If timing controllers individually recognize and adjust inversion schemes, then each controller can optimize its controlled area, but image quality degrades due to differences in inversion schemes between areas

Engineering Contradiction:
Improvelocal optimization capabilityVSAvoidoverall image quality
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces asymmetry in the inversion scheme selection process by allowing different inversion schemes to be applied to different display areas based on detected problem patterns. However, this asymmetry is coordinated through inter-controller communication, ensuring that the overall image quality is maintained while still allowing local optimization where needed.

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentUS9911376B2Display device
Publication Date: 2018.03.06 LG DISPLAY CO LTD
  • US9911376B2 patent drawing
  • US9911376B2 patent drawing
  • US9911376B2 patent drawing

AI summary

A display device including plural timing controllers is provided. The display device includes a display panel, first and second data drive circuits, first and second timing controllers. The display panel includes pixels and data lines. The first data drive circuit supplies data voltages to a part of the data lines. The second data drive circuit supplies data voltages to the other of the data lines. The first and second timing controllers controls the display panel according to a first inversion scheme when images displayed by first and second image data do not include predetermined problem patterns, and controls the display panel according to an inversion scheme other than the first inversion scheme when the images displayed by the first and second image data include at least one of the predetermined problem patterns.