Display Panel Compensation Area Shifting for Luminance Uniformity

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Solution Overview

Problem

Existing display devices face challenges in maintaining uniformity and color coordinates due to manufacturing processes, leading to noticeable luminance and color differences across pixels, which degrade display quality.

Innovation Solution

Implementing a display device with compensation areas and a luminance and color compensator that shifts compensation areas during compensation to gradually change voltage codes, thereby ensuring uniformity and reducing perceivable luminance differences.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If luminance and color compensation is performed on the display panel, then display quality and uniformity are improved, but luminance differences occur at compensation boundaries

Engineering Contradiction:

Improveluminance uniformityVSAvoidluminance difference at boundary

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

The display panel is divided into multiple compensation areas, each independently compensated. This segmentation allows the luminance and color compensation to be performed in discrete regions, reducing the impact of boundary effects while maintaining overall uniformity across the display panel.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different compensation parameters are applied to different regions of the display panel based on local characteristics. The compensation controller adjusts luminance and color coordinates specifically for each compensation area, allowing optimized local compensation that accounts for variations in manufacturing processes across different regions.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If compensation areas are shifted during luminance and color compensation, then perceivable luminance differences are reduced, but voltage codes change affecting display uniformity

Engineering Contradiction:

Improveperceivable luminance differenceVSAvoiddisplay uniformity

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

The compensation areas are dynamically shifted during the luminance and color compensation process. This dynamic shifting prevents fixed boundary patterns from becoming visually perceivable, as the compensation regions move to different positions during operation, thereby reducing the visibility of boundary artifacts while maintaining display uniformity.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The compensation areas are shifted periodically or sequentially during the compensation process. This periodic action ensures that no single boundary position remains fixed, distributing the boundary effects across multiple positions and reducing the perceivability of luminance differences at any specific location.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS20260004748A1Display device, method of compensating for luminance and color of the display device, and electronic device including the display device

Publication Date: 2026.01.01 SAMSUNG DISPLAY CO LTD

AI summary

A display device comprises a display panel including a plurality of compensation areas, each of which includes at least one pixel, a driving controller including a compensation controller and a luminance color compensator, performing a luminance and color compensation for each of the compensation areas, and generating a voltage code and a data signal, a gamma reference voltage generator receiving the voltage code and generating a gamma reference voltage based on the voltage code, and a data driver connected to the driving controller and the gamma reference voltage generator and generating a data voltage based on the data signal and the gamma reference voltage. Each of the compensation areas after the luminance and color compensation may have a target gamma value and a target color coordinate. The compensation areas may be shifted while the luminance color compensation is performed.