Mura Compensation Module Using Reference Luminance Bands
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Solution Overview
Problem
Display devices suffer from luminance and color deviations due to manufacturing defects, leading to mura, and existing compensation methods require large memory capacity to store compensation data for varying brightness levels.
Innovation Solution
A mura compensation module that sets luminance bands, uses a memory to store reference mura compensation values for each gray scale in a reference luminance band, and determines input mura compensation values based on these references, reducing the need for storing values for each gray scale in each luminance band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If compensation data for each gray scale in each luminance band is stored in memory, then mura compensation accuracy across varying brightness levels is improved, but memory capacity requirements increase
Solution Approach 1:
The patent uses a reference luminance band as a template or copy that can be applied to multiple actual luminance bands. Instead of storing separate compensation data for each luminance band, the system creates compensation values for current luminance bands by referencing and adapting the data from the reference luminance band, significantly reducing memory requirements while maintaining compensation accuracy
Solution Approach 2:
The reference luminance band serves multiple functions: it acts as a storage template, a comparison standard, and a source for generating compensation data for various luminance bands. This multi-functional approach allows a single reference set of data to support compensation across different brightness levels, reducing the need for separate compensation data for each luminance band
2Measurement precision
If reference gray scale values are determined through complex mapping processes, then compensation accuracy is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary establishment of the reference luminance band and its compensation data in advance. By pre-processing and storing the reference data structure, the system avoids complex real-time mapping calculations during actual compensation operations, significantly reducing tact time while maintaining accuracy through the pre-established reference framework
Data Source
AI summary
A Mura compensation module includes a DBV setting unit for setting one of a plurality of luminance bands as a set luminance band; a memory storing a reference Mura compensation value for each grayscale from a reference luminance band;, and a Mura compensation value determination unit for determining an input Mura compensation value of a first input grayscale value in the set luminance band, on the basis of the reference Mura compensation value for each grayscale from the reference luminance band.