Display Device Overlap Driving and Fake Data Insertion

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Solution Overview

Problem

Conventional display devices face issues with image quality due to insufficient charging of sub-pixels, leading to blurred images and luminance differences caused by varying emission periods, which degrade the overall display performance.

Innovation Solution

The implementation of a display device with a dedicated structure for overlap driving and fake data insertion driving, where overlap driving improves charging rates and fake data insertion driving prevents afterimages and enhances moving picture response time, allowing for independent operation of these methods to improve image quality and resolution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional sequential scanning driving is used, then device complexity is low, but sub-pixel charging is insufficient leading to blurred images and luminance differences

Engineering Contradiction:

Improveimage qualityVSAvoiddriving method complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent divides the display panel into multiple sub-pixel rows and applies different scanning strategies to different row groups. First sub-pixel rows use a first scanning method while second sub-pixel rows use a second scanning method, allowing segmented optimization of charging rates for different regions without requiring complete system redesign.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic scan signal generation where the gate driving circuit selectively applies different scanning methods based on row position. The scan signals are dynamically adjusted to provide overlap driving for certain rows while using conventional scanning for others, enabling adaptive optimization of charging rates during operation.

Inventive Principle:

Principle #15Dynamics

2Productivity

If overlap driving is applied to all sub-pixel rows, then charging rate improves, but device complexity and difficulty of control increase

Engineering Contradiction:

Improvecharging rateVSAvoiddriving circuit complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent segments the display panel into first and second sub-pixel rows, applying overlap driving only to the first sub-pixel rows while using conventional sequential scanning for the second sub-pixel rows. This selective application reduces the complexity burden on the gate driving circuit while still achieving charging rate improvement where most needed.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of applying overlap driving to all rows, the patent applies it partially only to first sub-pixel rows. This partial action approach achieves sufficient charging rate improvement for the critical regions without requiring the full complexity of universal overlap driving implementation.

Inventive Principle:

Principle #16Partial or excessive action

3Reliability

If fake data insertion driving is performed, then afterimages are prevented and moving picture response time improves, but image display delay occurs

Engineering Contradiction:

Improveafterimage preventionVSAvoidimage display delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent segments the scanning process into distinct phases: fake data insertion phase for afterimage prevention and real image display phase for content delivery. By separating these functions in the scanning sequence and using different scan signal patterns for different row groups, the system prevents afterimages while managing display delay through efficient phase transition.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs fake data insertion as a preliminary action before real image display in certain scanning phases. This preliminary action prepares the sub-pixels to prevent afterimages by clearing residual charges, and the subsequent real image scanning promptly delivers the actual content to minimize perceived delay.

Inventive Principle:

Principle #10Preliminary action

4Stability of the object's composition

If different scanning methods are applied to different sub-pixel rows, then charging rate uniformity improves, but gate driving control complexity increases

Engineering Contradiction:

Improvecharging uniformityVSAvoidscan signal control difficulty

Core Design Contradiction:

Stability of the object's compositionVSDifficulty of detecting and measuring

Solution Approach 1:

The patent divides sub-pixel rows into first and second groups and applies different scanning methods to each group. First sub-pixel rows receive scan signals with overlap driving for uniform charging, while second sub-pixel rows receive conventional scan signals. This segmentation approach achieves charging uniformity across different row types while keeping the control logic manageable through clear group differentiation.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS11289014B2Display device, driving circuit, and driving method

Publication Date: 2022.03.29 LG DISPLAY CO LTD

AI summary

A display device, a driving circuit, and a driving method, and there are provided a structure and a driving circuit allowing overlap driving for improving a charging rate and fake data insertion driving, in which a fake image is inserted between real images to prevent afterimages and improve moving picture response time, to be simultaneously performed, thereby making it easier to implement high resolution.