Gamma Correction Apparatus for Display Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices often experience deviations in image quality characteristics due to manufacturing process variations, leading to suboptimal gamma correction.
Innovation Solution
A gamma correction apparatus and method that utilize big data to predict gamma values for display devices by measuring optical characteristics and generating measurement and prediction gamma data using an equation defining the relationship between gray levels and optical characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manufacturing process is used to produce display devices, then production efficiency is improved, but image quality characteristics deviate due to manufacturing variations
Solution Approach 1:
The patent applies parameter changes by measuring actual optical characteristics (luminance, color coordinates) of display panels and using these measured parameters to calculate gamma correction values. The system dynamically adjusts gamma correction parameters based on real measurements rather than relying solely on manufacturing specifications, thereby compensating for manufacturing variations and improving image quality consistency across production batches.
Solution Approach 2:
The patent replaces traditional manufacturing-based quality control with an optical measurement and computational approach. Instead of relying on mechanical manufacturing precision, the system uses optical characteristic measurements and mathematical calculations (gamma correction algorithms) to achieve consistent image quality, substituting physical manufacturing control with measurement-based correction.
2Reliability
If gamma correction is performed using traditional methods, then basic correction is achieved, but correction accuracy is insufficient due to manufacturing deviations
Solution Approach 1:
The patent implements feedback by measuring the actual optical characteristics of display panels and using these measurements to calculate and adjust gamma correction values. The measured luminance and color coordinates are fed back into the correction algorithm to determine precise gamma correction parameters, creating a closed-loop system that continuously refines correction accuracy based on actual performance data.
Solution Approach 2:
The patent applies segmentation by dividing the gamma correction process into distinct stages: measuring optical characteristics at specific gray levels, calculating gamma correction values based on measured data, and applying corrections across different gray level ranges. This segmented approach allows for more precise and manageable correction processing, improving overall correction accuracy.
Data Source
AI summary
A gamma correction apparatus for a display device, includes: a measurer configured to measure an optical characteristic of a display panel; and a gamma data generator configured to generate measurement gamma data for at least one measurement gray level pre-determined from among a plurality of gray levels, based on the optical characteristic received from the measurer, generate prediction gamma data for at least one prediction gray level other than the at least one measurement gray level from among the plurality of gray levels by using an equation defining a relationship between a gray level and an optical characteristic, and generate gray level-wise gamma data, based on the measurement gamma data and the prediction gamma data.