Laser Projection Light Modulation for Distortion-Free Dynamic Contrast
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Solution Overview
Problem
Current laser projection apparatuses face issues with image distortion due to excessive image processing to enhance contrast, leading to poor display effects.
Innovation Solution
A laser projection apparatus with a light modulation device that modulates illumination beams of different intensities based on image partitions, using a control unit to adjust light modulation mirrors for coherent or destructive interference, enhancing dynamic contrast without altering the source's luminous brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If image processing algorithms are used to weight gray scale values to enhance contrast, then image contrast is improved, but image distortion occurs due to excessive processing
Solution Approach 1:
The illumination beam is divided into multiple beam partitions, with each partition corresponding to a specific image partition. This segmentation allows independent intensity control for different regions of the image, enabling local contrast enhancement without distorting the overall image structure.
Solution Approach 2:
Different beam partitions are assigned different light intensities based on the specific requirements of corresponding image partitions. This local quality adjustment enables contrast enhancement in specific regions while maintaining accuracy in other regions, avoiding the uniform over-processing that causes distortion.
2Device complexity
If the source outputs illumination according to a fixed beam size, then the source structure is simple, but the source cannot be partitioned for differential intensity control
Solution Approach 1:
The fixed beam from the source is segmented into multiple beam partitions using optical elements. Each beam partition can be independently controlled in intensity, providing adaptability for different display requirements while maintaining a relatively simple source structure.
Solution Approach 2:
Optical intermediaries (such as lenses, mirrors, or beam splitting elements) are introduced between the simple source and the display medium. These intermediaries enable beam partitioning and differential intensity control without requiring complex modifications to the source itself.
3Illumination intensity
If image processing is applied to expand gray scale difference, then local brightness is improved, but the overall image quality deteriorates due to distortion
Solution Approach 1:
The image is divided into multiple partitions, with each partition receiving tailored intensity control through corresponding beam partitions. This allows local brightness optimization without applying uniform processing that would distort the overall image and reduce display reliability.
Solution Approach 2:
The light intensity parameter is varied across different beam partitions to optimize local brightness. By changing intensity parameters locally rather than applying uniform image processing, the system improves local display quality while maintaining overall image integrity and reliability.
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
Improves the display effect by increasing the dynamic contrast of projected images without image distortion, achieved through real-time adjustment of beam intensities and phases.
Implementation Method 1
using a control unit to adjust light modulation mirrors for coherent or destructive interference
Data Source
AI summary
Disclosed by the present application are a laser projection device and projection display method thereof, belonging to the technical field of laser projection. The laser projection device may comprise: a light source, a light modulation device, and a projection lens. The light source is used for providing an illumination beam. The light modulation device is used for modulating the illumination beam, at least two illumination beams being incident on at least two light-reflecting surfaces of the light modulating device, the light-reflecting surface types of the at least two light-reflecting surfaces being different, and the at least two illumination beams after modulation being of different light intensity; the projection lens is used for projecting the modulated illumination beam for imaging. The described laser projection device improves the display of the projected image.