Multi-band Image Projection System with Laser and Lamp Projectors
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Solution Overview
Problem
Existing image projection systems face challenges in efficiently projecting high-quality images on varying surfaces and network conditions, particularly with mobile device displays and internet connectivity, which can result in poor image quality and alignment issues.
Innovation Solution
A system comprising a projector device with a raster laser projector and low-frequency projectors, capable of filtering image data into high and low-frequency bands, dynamically adjusting scan lines, and using infrared sensors for depth mapping and ambient light correction, to ensure accurate and high-quality image projection on non-uniform surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single projector is used to project images, then the device structure is simple, but the image quality and alignment on non-uniform surfaces deteriorate
Solution Approach 1:
The patent divides the projection system into multiple independent projectors (first projector and second projector) that project different frequency bands of image data. The first projector handles low-frequency components while the second projector handles high-frequency components, allowing each projector to be optimized for its specific function and improving overall image quality on non-uniform surfaces
Solution Approach 2:
The patent introduces a frequency domain dimension by separating image data into different frequency bands (low-frequency and high-frequency components) and projecting them through different projectors. This dimensional separation allows independent optimization of each projection path for its specific frequency range, resolving the contradiction between simple structure and high precision
2Manufacturing precision
If high-frequency image data is projected using traditional methods, then the image detail is preserved, but power consumption increases
Solution Approach 1:
The patent segments the projection of high-frequency image data across multiple specialized projectors (second projector for visible light, third projector for ultraviolet, fourth projector for infrared). Each projector is optimized for its specific frequency band, achieving high image quality while distributing and reducing overall power consumption compared to a single high-power projector
Solution Approach 2:
The patent replaces traditional single-projector mechanical projection with a multi-projector system using different spectral ranges (visible, ultraviolet, infrared). This substitution allows more efficient energy utilization by matching projector output characteristics to the specific requirements of different frequency bands
3Manufacturing precision
If multiple projectors are used to improve image quality, then the image alignment and surface adaptation improve, but the device form factor increases
Solution Approach 1:
The patent makes each projector multi-functional by equipping them with identical sensors (ambient light sensors, depth sensors, cameras) and control circuits. Each projector can independently perform surface mapping, alignment calculation, and image adjustment, eliminating the need for additional dedicated alignment devices and reducing overall system volume
4Adaptability or versatility
If image data is transmitted over network with varying conditions, then the system adaptability is tested, but image quality consistency deteriorates
Solution Approach 1:
The patent implements dynamic adaptation by allowing each projector to independently adjust its projection parameters (brightness, focus, alignment) based on real-time sensor feedback from the projection surface and ambient conditions. This dynamic adjustment maintains image quality consistency despite varying network transmission conditions and environmental changes
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 system achieves efficient, high-quality image projection with reduced power consumption and a smaller form factor, while correcting for surface irregularities and ambient conditions, ensuring alignment and maintaining image quality across different projection surfaces.
Implementation Method 1
a raster laser projector operable to project the high-frequency image data
Implementation Method 2
a first low-frequency projector operable to project the low-frequency image data, wherein the first low-frequency projector includes a lamp-based projector
Implementation Method 3
an infrared sensor operable to detect light reflected from the projection surface
Implementation Method 4
an ambient light sensor operable to detect ambient light
Data Source
AI summary
Devices and techniques are generally described for multi-band projection of image data. In various examples, image data may be identified. In some examples, first image data of a first frequency may be generated from the image data. In some examples, second image data of a second frequency may be generated from the image data. In various examples, the first frequency may be higher than the second frequency. In some examples, a first image may be projected onto a projection surface using a raster projector. In an example, the first image may correspond to the first image data. In further examples, a second image may be projected onto the projection surface overlaying the first image. In various other examples, projecting the second image onto the projection surface may be performed using a lamp-based projector. In some examples, the second image may correspond to the second image data.