Image Processing Uniformity Correction for Display Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image processing devices fail to completely eliminate brightness unevenness on display screens, even after uniformity correction, leading to residual brightness inconsistencies.
Innovation Solution
An image processing device that generates and applies unique uniformity correction data for each color signal (R, G, B) by shifting pixel positions during multiplication, using a multiplier to correct brightness unevenness across the screen, and incorporates a level correction unit to prevent white balance disturbance at low color signal levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If uniformity correction is applied using conventional image processing, then brightness unevenness is reduced, but grid-like brightness unevenness with predetermined shape remains on the screen
Solution Approach 1:
The patent applies asymmetry by intentionally shifting pixel positions differently for each color signal (R, G, B). Instead of uniform correction, each color channel is corrected with a different pixel shift amount, breaking the grid-like pattern symmetry that causes the harmful brightness unevenness while maintaining overall brightness uniformity.
Solution Approach 2:
The patent applies local quality by using different correction strategies for different color signals. Each color channel (R, G, B) receives customized uniformity correction with specific pixel shift amounts tailored to its characteristics, rather than applying a single uniform correction method to all pixels.
2Measurement precision
If uniformity correction data is generated for each color signal, then color accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by using a single uniformity correction data structure that serves multiple color signals simultaneously. The correction data generation unit generates correction values that are applied across R, G, and B channels through a unified multiplication process, reducing the need for separate complex correction mechanisms for each color.
Solution Approach 2:
The patent applies parameter changes by adjusting pixel position parameters differently for each color signal during the multiplication process. By changing the effective pixel position parameter in the correction data generation, the system achieves color-specific accuracy improvements without requiring fundamentally different correction structures.
Data Source
AI summary
A uniformity correction data generation unit generates uniformity correction data for an R signal, a G signal, and a B signal. A multiplier multiplies pixel signals of the R signal, the G signal, and the B signal by the uniformity correction data for the R signal, the G signal, and the B signal. The multiplier shifts, from one another, positions of pixels at a time of multiplying the pixel signals of the R signal, the G signal, and the B signal by the uniformity correction data for the R signal, the G signal, and the B signal.