Concave Lens Mask for Splice Display Graininess
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Solution Overview
Problem
Large-scale splice display systems using multiple independent display apparatuses face challenges in achieving a smooth, non-grainy image due to the large spacing between LED devices, which affects image quality, especially in outdoor displays.
Innovation Solution
The display apparatus incorporates a lamp panel with light-emitting elements and a mask featuring light-transmitting parts with concave lenses, where the light-emitting elements are positioned on the optical axis of the concave lenses, and the mask includes a scattering particle material to scatter light and form larger light spots, reducing graininess.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If large spacing is used between LED devices in splice display systems, then the display apparatus can be assembled more easily and cost-effectively, but the image quality deteriorates due to graininess and poor smoothness
Solution Approach 1:
The patent introduces a mask as an intermediary component between the LED light-emitting elements and the viewing area. This mask contains light-transmitting parts with specific optical properties that mediate the light output, transforming the discrete LED points into a continuous visual field. The mask acts as a mediator that reconciles the large spacing between LEDs with the requirement for smooth, grain-free images by controlling light distribution patterns.
Solution Approach 2:
The patent changes the optical parameters of the light-transmitting parts in the mask, specifically using concave lenses with defined curvature radii and focal lengths. By adjusting these optical parameters, the light from widely-spaced LED elements is redistributed to create larger, overlapping light spots that eliminate the grainy appearance while maintaining the benefit of large LED spacing for ease of assembly.
2Strength
If large spacing is used between LED devices, then the device structure becomes simpler and more durable, but the luminance and image smoothness deteriorate
Solution Approach 1:
The patent modifies the optical parameters of the mask components, specifically the curvature radius and focal length of the concave lenses in the light-transmitting parts. These parameter changes enable the system to maintain high luminance smoothness by controlling light spread and overlap, while the LED elements can remain widely spaced for structural durability.
Solution Approach 2:
The patent transitions from considering only the spatial arrangement of LED elements in two dimensions to incorporating the optical dimension through the mask. By adding this third dimension of light control, the system achieves smooth luminance distribution even with large physical spacing between LEDs, effectively resolving the contradiction between structural simplicity and visual quality.
3Manufacturing precision
If concave lenses with specific curvature are used in the mask, then image quality and luminance improve, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent specifies particular ranges for the curvature radius and focal length parameters of the concave lenses to optimize image quality while considering manufacturability. By defining these parameters within specific ranges rather than requiring precise unique values, the patent balances image quality improvement with manufacturing feasibility and cost control.
Solution Approach 2:
The patent employs multiple light-transmitting parts with identical or similar optical parameters (curvature radius, focal length) throughout the mask. This homogeneity simplifies the manufacturing process by allowing mass production of identical components, reducing complexity despite the sophisticated optical functionality required for high image quality.
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
This configuration enhances image quality by reducing graininess and improving luminance, especially in large-scale outdoor displays, while also providing structural support and anti-slip features for durability and safety.
Implementation Method 1
each of the plurality of light-transmitting parts includes a concave lens, and a surface of the concave lens close to the light-emitting element is a concave arc surface
Implementation Method 2
a scattering particle material is doped inside the light-transmitting part
Implementation Method 3
the light-condensing structure is configured to reflect and/or refract light for multiple times
Implementation Method 4
the light-condensing structure is configured to reflect and/or refract light for multiple times
Data Source
AI summary
A display apparatus and a splice display system are disclosed. The display apparatus includes: a lamp panel, which includes a circuit board and a plurality of light-emitting elements on the circuit board; and a mask on side of the plurality of light-emitting elements away from the circuit board, where the mask includes a plurality of light-transmitting parts corresponding to the plurality of light-emitting elements, an orthographic projection of each of the plurality of light-emitting elements on the circuit board is within an orthographic projection of a corresponding light-transmitting part on the circuit board, each of the plurality of light-transmitting parts includes a concave lens, and a surface of the concave lens close to the light-emitting element is a concave arc surface.