Micro LED Display Varying Element Distance and Angle
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Solution Overview
Problem
Current micro LED display devices face challenges in achieving optimal display characteristics such as wide viewing angle and high luminance, particularly in balancing light emission between the center and peripheral regions of the display.
Innovation Solution
The display device incorporates a substrate with varying distances and angles of light emitting elements between the center and peripheral regions, where the absolute value of the angle formed by the direction parallel to the substrate and the bottom surface of light emitting elements in the periphery is greater than that at the center, allowing for improved light distribution and luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light emitting elements are arranged with uniform distance and angle across the display region, then manufacturing is simplified, but luminance uniformity and viewing angle characteristics deteriorate
Solution Approach 1:
The patent applies local quality by varying the distance and inclination angle of light emitting elements based on their position in the display region. Specifically, the distance between the substrate and light emitting elements increases from the center toward the periphery, and the inclination angles are adjusted differently for center and peripheral regions. This local differentiation achieves uniform luminance across the display while maintaining manufacturing feasibility through systematic variation rather than complete complexity.
2Manufacturing precision
If light emitting elements in the periphery are positioned closer to the substrate, then manufacturing precision is improved, but viewing angle and luminance distribution deteriorate
Solution Approach 1:
The patent employs asymmetry by creating different positional and angular configurations for light emitting elements in the center versus periphery regions. The inclination angles are specifically designed to be larger in the periphery than in the center, and the distances are systematically increased toward the periphery. This asymmetric arrangement optimizes both positioning precision and viewing angle characteristics for different display regions simultaneously.
3Device complexity
If light emitting elements have uniform inclination angles, then device complexity is reduced, but luminance distribution and viewing angle performance worsen
Solution Approach 1:
The patent applies dynamics by making the inclination angles of light emitting elements variable rather than fixed. The inclination angles are dynamically adjusted based on position - with larger angles in peripheral regions and smaller angles in central regions. This dynamic configuration allows the display to achieve optimal luminance distribution and viewing angle characteristics across different regions while maintaining manageable device complexity through systematic variation.
Data Source
AI summary
A display device, includes: a substrate; a plurality of pixels provided on the substrate; and a plurality of light emitting elements provided in each of the pixels. A first distance between a top surface of the substrate and one of the light emitting elements in a direction perpendicular to the top surface of the substrate, in a center portion of a display region of the substrate, is different from a second distance between the top surface of the substrate and another one of the light emitting elements in the direction perpendicular to the top surface of the substrate, in a periphery portion of the display region.