Display Timing Controller Adaptive Low-Power Transmission Threshold

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Solution Overview

Problem

Existing display devices face challenges in reducing power consumption while maintaining image quality, particularly in managing low-power transmission driving based on image luminance and preventing artifacts like mura.

Innovation Solution

A display device and driving method that dynamically adjust the threshold for low-power transmission driving based on the luminance of the image, allowing for independent control of low-power transmission for different areas of the display panel and incorporating external compensation to improve image quality.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If low-power transmission driving is activated to reduce power consumption, then power consumption is reduced, but image quality deteriorates due to artifacts like mura

Engineering Contradiction:

Improvepower consumptionVSAvoidimage quality

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent applies local quality by differentiating the low-power transmission driving application across different luminance regions. High-luminance areas utilize low-power transmission driving to reduce power consumption, while low-luminance areas maintain normal transmission driving to preserve image quality and avoid mura artifacts. This spatial differentiation allows the system to optimize power consumption locally without compromising overall image quality.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the transmission driving parameter (threshold value) based on image luminance characteristics. By dynamically adjusting the threshold value according to luminance levels, the system enables low-power transmission driving for high-luminance images while preventing its application for low-luminance images that are prone to mura artifacts, thus resolving the contradiction between power consumption and image quality.

Inventive Principle:

Principle #35Parameter changes

2Device complexity

If a fixed threshold value is used for low-power transmission driving, then the control is simple, but image quality cannot be optimized for different luminance levels

Engineering Contradiction:

Improvecontrol complexityVSAvoidimage quality

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent implements dynamics by making the threshold value adaptive rather than fixed. The threshold value dynamically adjusts based on the luminance characteristics of the image content, allowing the system to automatically optimize for different luminance levels. This dynamic adaptation improves image quality without requiring complex manual configuration or multiple fixed threshold modes.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system performs self-service by automatically determining the luminance characteristics of the image and adjusting the threshold value accordingly. The timing controller independently evaluates the image luminance and configures the appropriate threshold without external intervention, enabling the system to optimize image quality adaptively while maintaining simple control architecture.

Inventive Principle:

Principle #25Self-service

3Use of energy by moving object

If low-power transmission driving is applied to all areas, then power consumption is maximally reduced, but mura artifacts appear in low-luminance areas

Engineering Contradiction:

Improvepower consumptionVSAvoidmura artifacts

Core Design Contradiction:

Use of energy by moving objectVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by spatially differentiating the application of low-power transmission driving. High-luminance areas are permitted to use low-power transmission driving for maximum power savings, while low-luminance areas are excluded from this mode to prevent mura artifacts. This localized application strategy maximizes power consumption reduction in safe regions while protecting vulnerable regions from quality degradation.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent converts the potential harm of low-power transmission driving (mura artifacts in low-luminance areas) into a benefit by using luminance detection as a protective mechanism. The luminance evaluation serves as a discriminator that prevents harmful application of low-power mode in susceptible areas, transforming what could be a universal harmful effect into a selectively managed condition that benefits overall system performance.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS12340752B2Display device and driving method thereof

Publication Date: 2025.06.24 LG DISPLAY CO LTD

AI summary

A display device includes a display panel comprising a plurality of pixels displaying an image; a data driver configured to supply a data signal to the plurality of pixels and comprising a plurality of source drive integrated circuits (ICs); and a timing controller configured to differentially supply video data to the data driver by a frame based on a gradation difference in the video data among consecutive pixel rows.