Light Source Color Rendering Calibration Under Ambient Light

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Solution Overview

Problem

Current color sensors used in media playback equipment suffer from low color accuracy due to external light sources and environmental factors, leading to inconsistent color rendering between the display screen and light source, resulting in a less immersive viewing experience.

Innovation Solution

A method involving a color sensor to collect initial color data, convert it into a target color space with saturation and brightness channels, and adjust these values to achieve a color rendering error within an error margin, using a light source system with process equipment to ensure consistency between the light source and display screen.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If color sensors are used to collect color data for timeliness, then response time is reduced, but color accuracy deteriorates due to external light source influence

Engineering Contradiction:

Improvedata processing delayVSAvoidcolor data accuracy

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The patent introduces an intermediary processing mechanism that separates color data collection from color rendering control. A color sensor collects initial color data, which is then processed through a look-up table (LUT) that maps sensor readings to corrected color values. This intermediary LUT acts as a mediator that compensates for the inaccuracies introduced by external light sources, allowing the system to use fast color sensor data while achieving accurate color rendering through the pre-computed correction mappings.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent applies preliminary action by pre-calculating and storing color correction mappings in a look-up table before actual color rendering operations. The system pre-processes the relationship between color sensor readings and actual display colors under various lighting conditions, storing these corrections in advance. When color data is needed, the system simply retrieves pre-computed corrections from the LUT rather than performing complex real-time calculations, thus achieving both speed and accuracy.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If image processing is performed to match color rendering, then color consistency between display and light source is improved, but data processing delay increases to 200-300 milliseconds

Engineering Contradiction:

Improvecolor rendering consistencyVSAvoiddata processing delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent replaces complex mechanical/image processing systems with a simplified data lookup mechanism. Instead of performing full image processing operations to achieve color matching, the system substitutes this with a direct color space conversion and LUT-based correction approach. This substitution maintains color rendering consistency while dramatically reducing processing time from 200-300 milliseconds to near-real-time performance.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the processing parameters from full image pixel-by-pixel analysis to direct color space transformations. By converting color data between color spaces (e.g., from sensor color space to display color space) and applying pre-computed LUT corrections, the system achieves color consistency through parameter transformations rather than intensive image processing, thus reducing the 200-300ms delay to minimal processing time.

Inventive Principle:

Principle #35Parameter changes

3Speed

If color sensor data is used directly for light source control, then response speed is improved, but color rendering accuracy deteriorates due to ambient light effects

Engineering Contradiction:

Improvecolor rendering response speedVSAvoidcolor rendering accuracy

Core Design Contradiction:

SpeedVSManufacturing precision

Solution Approach 1:

The patent introduces an intermediary LUT-based correction system between color sensor data collection and light source control. The color sensor quickly captures color information, which is then passed through the LUT intermediary that compensates for ambient light effects. This intermediary layer maintains the fast response speed of direct sensor control while improving color rendering accuracy by applying pre-computed correction factors.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses copying by creating a pre-computed model (LUT) that copies the relationship between sensor readings and actual colors under various lighting conditions. Instead of directly using raw sensor data, the system copies the corrected color mappings from the LUT, which were pre-determined through calibration processes. This copying mechanism preserves response speed while ensuring accuracy.

Inventive Principle:

Principle #26Copying

Data Source

PatentUS12475827B2Method for processing color data, light source system, device, equipment, and storage medium

Publication Date: 2025.11.18 SHENZHEN UASCENT TECH CO LTD

AI summary

A method for processing color data, which includes steps of: obtaining initial color data of a target display area collected by a color sensor; converting the initial color data into color data to be processed in a target color space that includes a saturation channel and brightness channel; and adjust an initial saturation value of the color data to be processed in the saturation channel and an initial brightness value of the color data to be processed in the brightness channel to obtain first target color data, the first target color data is applied to adjust a color rendering of the light source so that a color rendering error between the color rendering of the light source and a color rendering of the target display area is within an error margin.