Display Panel Micro-Lens Offset for Luminance Uniformity
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Solution Overview
Problem
Current virtual-reality and augmented-reality display devices suffer from poor luminance uniformity, with luminance decreasing gradually from the center to the edges of the display region.
Innovation Solution
A display panel design featuring light-emitting elements, color filters, and micro-lenses on a substrate, where the geometric centers of color filters and micro-lenses are offset and volumetrically increased relative to light-emitting elements, ensuring that luminance increases gradually from the center, compensating for luminance differences and improving uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional display structures are used with uniform component arrangement, then manufacturing is simple, but luminance uniformity deteriorates with center-bright edges-dim distribution
Solution Approach 1:
The patent applies local quality by varying the offset distances and volumes of micro-lenses and color filters based on their position in the display region. Components in different regions (center vs. edges) have different structural parameters, with micro-lens volumes and offset distances increasing from center to edge to compensate for the luminance falloff, thereby achieving uniform luminance distribution across the display surface.
Solution Approach 2:
The patent introduces asymmetry by deliberately misaligning the geometric centers of micro-lenses and color filters relative to the light-emitting elements. This asymmetric arrangement, where offset distances vary by position, creates non-uniform optical paths that compensate for the natural luminance decay from center to edge, transforming the symmetric uniform structure into an asymmetric compensated structure.
2Illumination intensity
If micro-lens volumes are increased gradually from center to edge, then luminance uniformity improves, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating and pre-setting the optimal offset distances and micro-lens volumes for each position in the display region before manufacturing. The design phase includes determining the precise gradual variation parameters, allowing the manufacturing process to follow a predetermined pattern rather than requiring complex real-time adjustments, thus reducing actual manufacturing precision requirements.
Solution Approach 2:
The patent utilizes parameter changes by systematically varying the offset distances and micro-lens volumes as continuous parameters across the display region. Instead of discrete adjustments, the parameters change gradually and continuously from center to edge, allowing for smooth luminance compensation while simplifying the manufacturing process through parameterized design.
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 enhances luminance uniformity across the display region by increasing luminance gradually from the center, ensuring that angles and luminance of main optical axes meet requirements, thereby improving the overall display performance.
Implementation Method 1
a plurality of micro-lenses disposed on the substrate... Each micro-lens is disposed on one side of a respective color filter corresponding to the micro-lens facing away from the light-emitting elements
Data Source
AI summary
Provided are a display panel and display device. The geometric center of the display region in the display panel is configured as a first center. Circles centered at the first center are configured as first circles. Along a direction in which a radius of any one of the first circles points away from the first center, the offsets of the geometric centers of multiple color filters relative to the light-emitting centers of multiple light-emitting elements and away from the first center increase gradually, and the volumes of multiple micro-lenses increase gradually.