OLCD Compensation Data Calculation Using Look-Up Table
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Solution Overview
Problem
Existing compensation data calculation methods for organic light emitting displays are inefficient due to repeated luminance measurements, leading to increased calculation time and reduced accuracy.
Innovation Solution
A method that calculates compensation coefficients using multiple gray scale voltages and corresponding luminance values, stored in a look-up table to compensate digital video data, reducing calculation time and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the process of measuring luminance by supplying predetermined gray scale voltage is repeated several times to increase accuracy, then the measurement precision improves, but the calculation time increases
Solution Approach 1:
The patent pre-calculates and stores compensation data in a look-up table during the manufacturing process, so that compensation data can be quickly retrieved during display operation without requiring repeated real-time measurements and calculations
Solution Approach 2:
The patent performs luminance measurements at multiple different gray scale voltages (excessive measurements during calibration) to establish a comprehensive look-up table, allowing accurate compensation to be achieved with a single subsequent lookup operation rather than repeated measurements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly reduces the calculation time of compensation data while maintaining accuracy by using equations to determine compensation coefficients from multiple luminance and voltage measurements, ensuring consistent pixel luminance.
Implementation Method 1
the organic light emitting display displays images using organic light emitting diodes that emit light through recombination of electrons and holes
Data Source
AI summary
A method for calculating compensation data includes, a first luminance value that is calculated by supplying a first gray scale voltage to pixels and measuring a luminance. A second luminance value is calculated by supplying a second gray scale voltage to the pixels and measuring a luminance. Compensation coefficients are calculated using the first and second gray scale voltages and the first and second luminance values. Compensation data are calculated based on the compensation coefficients.