Display Panel Sub-Pixel Block Layout for Afterimage Compensation

Solution Overview

Problem

As display devices like OLEDs degrade over time, visible afterimages and decreased display quality occur due to the visibility of luminance differences and afterimages due to pixel block boundaries, and increased power consumption and memory capacity.

Innovation Solution

The display device includes a driving controller that receives input image data, generates output image data, and displays the image data on the basis of the input image data, and a display panel that displays the image based on the output image data.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the display panel is divided into blocks to compensate degradation data, then the afterimage can be reduced, but the number of blocks increases which leads to increased memory capacity and power consumption

Engineering Contradiction:

Improveafterimage reductionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The display panel is divided into multiple blocks, and each block is further divided into sub-blocks. This hierarchical segmentation allows degradation data to be managed at a coarser block level while still achieving effective afterimage compensation, reducing the total number of units requiring memory storage and processing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different compensation strategies are applied to different blocks based on their specific degradation characteristics. By calculating and storing degradation data at the block level rather than pixel level, the system achieves localized compensation with reduced memory requirements and lower power consumption.

Inventive Principle:

Principle #3Local quality

2Reliability

If the display panel is divided into blocks to compensate degradation data, then the afterimage can be reduced, but the number of blocks increases which leads to increased memory capacity

Engineering Contradiction:

Improveafterimage reductionVSAvoidmemory capacity

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The display panel is divided into multiple blocks, and each block is further divided into sub-blocks. This hierarchical segmentation allows degradation data to be managed at a coarser block level while still achieving effective afterimage compensation, reducing the total number of units requiring memory storage and processing.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different compensation strategies are applied to different blocks based on their specific degradation characteristics. By calculating and storing degradation data at the block level rather than pixel level, the system achieves localized compensation with reduced memory requirements and lower power consumption.

Inventive Principle:

Principle #3Local quality

3Ease of manufacture

If rectangular blocks are used to divide the display panel, then the block structure is simple, but the boundary length between adjacent blocks increases making luminance differences more visible

Engineering Contradiction:

Improveblock structure simplicityVSAvoiddisplay quality

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent employs non-rectangular block shapes with varying boundary configurations. By optimizing block geometry to minimize boundary length between adjacent blocks, the design reduces the visibility of luminance differences at block edges while maintaining effective degradation compensation.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS20260024486A1Display device, method of operating the display device and electronic device including the display device

Publication Date: 2026.01.22 SAMSUNG DISPLAY CO LTD

AI summary

A display device including: a driving controller to receive input image data, and generate output image data; a data driver to generate data voltages based on the output image data; and a display panel to display an image based on the data voltages. The driving controller is further to: divide the display panel into pixel blocks; divide each of the pixel blocks into sub-pixel blocks; calculate degradation data of each of the sub-pixel blocks; and generate the output image data based on the degradation data and the input image data. The sub-pixel blocks of a first pixel block of the pixel blocks have different shapes from each other.