Mini LED Substrate Edge Color Shift Correction
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Solution Overview
Problem
Mini LED display devices experience color shift issues at the edges due to uneven light emission, affecting chromaticity uniformity and overall display quality.
Innovation Solution
A light-emitting substrate with a light-emitting region containing multiple light-emitting elements that emit different colors, including edge light-emitting elements and adjacent elements, are strategically arranged to blend colors and prevent color shifts by varying their emission patterns and driving currents, ensuring uniformity and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional backlight modules are used in Mini LED display devices, then the display device can achieve local dimming and better performance, but color shift occurs at the edge of the display region
Solution Approach 1:
The patent applies local quality by differentiating the arrangement of light-emitting elements at different locations. Specifically, at the edge of the light-emitting region, light-emitting elements of different colors (e.g., red and green) are arranged alternately in a checkerboard pattern, while the central region uses a different arrangement. This local differentiation addresses the color shift problem at edges by ensuring that no single color dominates the edge regions, thereby improving chromaticity uniformity without compromising overall brightness performance.
Solution Approach 2:
The patent employs asymmetry by creating an asymmetric arrangement pattern between the edge region and the central region of the light-emitting substrate. The edge region uses a checkerboard pattern of alternating colors, while the central region uses a different configuration. This asymmetric design allows the edge regions to compensate for color shifts through the alternating color arrangement, while the central region maintains optimal brightness and color balance, thus resolving the contradiction between brightness uniformity and chromaticity uniformity.
2Manufacturing precision
If light-emitting elements are arranged to improve chromaticity uniformity at edges, then color shift is prevented, but the complexity of the light-emitting substrate increases
Solution Approach 1:
The patent applies segmentation by dividing the light-emitting substrate into distinct regions: an edge region and a central region. Each region has a specific arrangement pattern of light-emitting elements tailored to its functional requirements. The edge region uses an alternating color pattern to prevent color shift, while the central region uses a different pattern for optimal performance. This segmentation allows the system to achieve high chromaticity uniformity without making the entire substrate complex, as each segment has a relatively simple and regular pattern.
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 solution improves chromaticity uniformity at the edges of the display region, prevents color shifts, and enhances brightness uniformity without the need for additional components, thereby improving the display's visual quality and reducing manufacturing costs.
Implementation Method 1
The small-sized LED includes a Micro LED and a Mini LED... the light-emitting elements includes at least one edge light-emitting element adjacent to an edge of the light-emitting region
Implementation Method 2
configured to emit light of different colors... emit light of a first color, and the first light-emitting element is configured to emit light of a second color different from the first color
Data Source
AI summary
A light-emitting substrate, a display panel, a backlight module, a display device and a driving method. The light-emitting substrate has a light-emitting region and includes a plurality of light-emitting elements located in the light-emitting region and configured to emit light of different colors. The plurality of light-emitting elements includes an edge light-emitting element adjacent to an edge of the light-emitting region, and a first light-emitting element adjacent to the edge light-emitting element, and the edge light-emitting element is configured to emit light of a first color, and the first light-emitting element is configured to emit light of a second color different from the first color.