Laser Projection Engine Keystone Correction for Non-Flat Surfaces
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Solution Overview
Problem
Conventional projection technologies struggle to project clear images on complex, non-flat surfaces without distortion, as they require complex and costly lens systems that are inflexible and cannot adjust focal length, limiting their ability to adapt to varying distances and surface shapes.
Innovation Solution
The use of laser projection engines (LPEs) with moving mirrors, which can project focused images on complex-shaped objects by adjusting the mirror speed and using digital or optical keystone correction, allowing for flexible and distortion-free image projection on various surfaces, including household items like lamp shades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional projection technologies use complex lens systems to project images on non-flat surfaces, then image clarity can be maintained, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the focusing function from complex lens systems and implements it through software-based digital keystone correction and optical keystone correction using simple mirrors. This separates the projection function from the complex focusing mechanism, achieving clear images on non-flat surfaces without requiring complicated lens assemblies.
Solution Approach 2:
The patent replaces mechanical lens-based focusing systems with digital signal processing and software algorithms. Digital keystone correction uses computational methods to compensate for projection distortion, substituting complex mechanical optical systems with electronic processing that achieves the same image clarity goal.
2Adaptability or versatility
If conventional projection systems use fixed focal length lenses, then device simplicity is maintained, but adaptability to varying distances and surface shapes is lost
Solution Approach 1:
The patent implements dynamic adaptability through software-based keystone correction that can adjust in real-time to different projection surfaces and distances. The system dynamically calculates and applies correction parameters based on the detected surface geometry, enabling adaptation without physical lens changes or complex mechanical adjustments.
Solution Approach 2:
The patent changes the approach from physical parameter changes (variable focal length lenses) to digital parameter changes. By modifying digital projection parameters and using software algorithms, the system adapts to different distances and surface shapes without requiring complex optical components, achieving versatility through parameter adjustment rather than hardware complexity.
3Manufacturing precision
If conventional projectors use complex lens systems for non-flat surfaces, then image quality improves, but cost increases
Solution Approach 1:
The patent uses digital copies and software models of the projection surface to calculate and apply corrections. Instead of manufacturing complex custom lens systems for each surface type, the system creates digital representations of surfaces and uses computational algorithms to achieve the same image quality, significantly reducing manufacturing costs while maintaining precision.
Solution Approach 2:
The patent substitutes expensive mechanical lens systems with software-based correction algorithms. Digital keystone correction and optical keystone correction using simple mirrors replace the need for costly, complex lens assemblies, achieving high image quality on non-flat surfaces at a fraction of the manufacturing cost.
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
Enables clear, distortion-free image projection on complex surfaces without the need for complex lens systems, providing a flexible and cost-effective solution for dynamic image display in various environments.
Implementation Method 1
A laser or lasers projects an image in visible light
Implementation Method 2
lasers and moving mirrors to project an image
Data Source
AI summary
Miniature projection devices will enable the use of common household objects as the projection screen for still and moving images. This application describes a set of techniques and embodiments for implementing image projection inside a lamp such as a table or wall lamp and provides techniques for dealing with the unique physical attributes of lamps such as the shape of the lamp and the bright source of light that would tend to wash out the projected image. In addition, the invention presents a series of novel embodiments that respond changes in the environment to enable an immersive user experience and operation as a pet entertainment device.