How to Fix Color Uniformity in Digital Screens Using Math

A method for smoothing out color and brightness inconsistencies across a display screen by mathematically adjusting pixels based on their distance from a reference point.

What it covers

This patent describes a way to fix color unevenness in displays by using a mathematical model to adjust pixel values. The system defines a 'calibration vector' that includes a reference pixel, a calibration volume (the intensity of the fix), and a range (how far the fix spreads). The processor finds pixels that match the reference color, calculates how far they are from that reference, and applies a correction based on that distance. This allows the display to automatically smooth out color gradients or fix blotchy areas by applying different weights to pixels depending on their proximity to the target reference point.

What it doesn't cover

• —Does not cover hardware-based physical display repair or panel replacement.
• —Does not cover image processing techniques that adjust the entire screen globally without reference to specific pixel-to-pixel distance calculations.
• —Does not cover non-digital display technologies like mechanical flip-dot displays.

The clever bit

Instead of applying a blanket correction, it treats the screen as a 3D color space where corrections are applied like a gradient field, allowing for localized, smooth adjustments that prevent visible 'seams' between calibrated and uncalibrated areas.

Why it matters

Display uniformity is a major challenge in manufacturing high-end OLED and LCD panels. If a screen has slight color shifts or 'mura' (cloudy spots), it looks low-quality to the consumer. This patent provides a software-based approach to compensate for these manufacturing defects in real-time, potentially increasing production yields for display manufacturers.

Real-world examples

• 1.High-end smartphone OLED displays
• 2.Professional color-grading monitors
• 3.Automotive dashboard digital clusters