Display Luminance Compensation With Unit-Block And Pixel Correction

Solution Overview

Problem

Display devices, particularly those without self-luminous elements like liquid crystal displays, suffer from non-uniform luminance and color distribution due to factors such as light source driver chips, module assembly issues, and light source positioning, necessitating complex luminance uniformity compensation processes that often require extensive data handling.

Innovation Solution

A luminance uniformity compensation system and method that generates compensation data using smaller unit profiles and pixel-specific data, reducing the amount of data needed by splitting the display panel into unit blocks and extracting luminance data from these blocks to identify and correct singular points like dark or bright spots.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If luminance uniformity compensation is performed using traditional methods with full panel data, then compensation accuracy is improved, but data processing time and power consumption increase

Engineering Contradiction:

Improveluminance uniformity compensation accuracyVSAvoiddata processing time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The display panel is divided into multiple unit blocks, each processed independently to generate compensation data. This segmentation allows parallel processing of different regions, reducing overall processing time while maintaining compensation accuracy through localized analysis of luminance characteristics in each block.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Singular points (defect pixels) are extracted and identified from the luminance data of each unit block. By isolating and focusing processing resources on these specific defective pixels rather than processing all pixels uniformly, the system achieves accurate compensation for non-uniformity while minimizing unnecessary data processing.

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If luminance uniformity compensation is performed using traditional methods with full panel data, then compensation accuracy is improved, but power consumption increases

Engineering Contradiction:

Improveluminance uniformity compensation accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The display panel is divided into multiple unit blocks, each processed independently to generate compensation data. This segmentation allows parallel processing of different regions, reducing overall processing time while maintaining compensation accuracy through localized analysis of luminance characteristics in each block.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Singular points (defect pixels) are extracted and identified from the luminance data of each unit block. By isolating and focusing processing resources on these specific defective pixels rather than processing all pixels uniformly, the system achieves accurate compensation for non-uniformity while minimizing unnecessary data processing.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If detailed pixel-level compensation data is generated for the entire panel, then luminance uniformity compensation accuracy is improved, but the amount of compensation data increases

Engineering Contradiction:

Improveluminance uniformity compensation accuracyVSAvoidamount of compensation data

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

Singular points (defect pixels) are extracted and identified from the luminance data of each unit block. By isolating and focusing processing resources on these specific defective pixels rather than processing all pixels uniformly, the system achieves accurate compensation for non-uniformity while minimizing unnecessary data processing.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Different compensation strategies are applied to different regions: unit block-level compensation data is generated for general luminance variation, while pixel-level compensation is applied only to identified singular points. This localized approach reduces overall data quantity while maintaining accuracy where most needed.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12437711B2Luminance uniformity compensating system and method

Publication Date: 2025.10.07 LG DISPLAY CO LTD

AI summary

A luminance uniformity compensation system includes a display device having a display panel; a camera configured to generate picture data by capturing the display panel and extracting luminance data of the display panel from the picture data; and a uniformity compensation device configured to generate block compensation data of a unit block and priority pixel compensation data of a priority pixel of the unit block from the luminance data of the display panel and transmitting the block compensation data and the priority pixel compensation data to the display device, wherein the unit block includes a block of pixels defined within the display panel, and wherein the priority pixel includes a pixel having one of a dark spot or a bright spot.