Digital Micromirror Headlamp Zones for High-Resolution, Lower Heat
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Solution Overview
Problem
Existing digital micromirror devices in vehicle headlamps face challenges in achieving high-resolution light beams due to size constraints and excessive heat generation, which can affect the operation and efficiency of the micromirror arrays.
Innovation Solution
A system utilizing an array of 1.2-1.5 million micromirrors controlled by processors to project high-definition areas with a contrast ratio of at least 400:1 within a 20-degree by 10-degree field of view, incorporating advanced optical components like lenses and light absorbers to manage heat and enhance resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of micromirrors is increased to improve resolution, then the resolution is improved, but the heat generation becomes excessive
Solution Approach 1:
The micromirror array is divided into multiple zones with different functions: a high-definition area with higher resolution micromirrors and a peripheral area with lower resolution micromirrors. This segmentation allows the system to achieve high resolution in the central viewing area while reducing the total number of micromirrors, thereby decreasing heat generation.
Solution Approach 2:
Different regions of the micromirror array are assigned different quality levels. The central high-definition area uses higher precision micromirrors optimized for the driver's direct line of sight, while peripheral areas use lower precision micromirrors. This local differentiation maintains critical resolution where needed while reducing overall complexity and heat generation.
2Manufacturing precision
If the number of micromirrors is increased to improve resolution, then the resolution is improved, but the device size becomes larger
Solution Approach 1:
The micromirror array is segmented into a high-definition central area and a lower-resolution peripheral area. This allows the system to achieve high resolution in the most critical viewing zone without requiring a uniformly high-resolution array across the entire device, thereby reducing the overall device area.
Solution Approach 2:
The patent utilizes the angular dimension of light projection to create different resolution zones. By controlling micromirrors at different angles and positions, the system projects high-resolution images to specific angular ranges (e.g., 0-10 degrees for high definition, wider angles for lower definition), effectively using angular space to differentiate resolution without increasing physical device area.
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 high-definition light beams without compromising resolution or generating excessive heat, conforming to smaller form factors and reducing resource wastage.
Implementation Method 1
The optical module can include an array of micromirrors
Data Source
AI summary
Systems and method described herein are directed a digital micromirror device high resolution lamp system. The system can include an optical module. The optical module can be configured to dispose inside a headlamp. The optical module can include an array of micromirrors. The system can include one or more processors coupled with memory. The one or more processors can be configured to provide a beam of light. The beam of light can include an origin. The one or more processors can be configured to control a zone within the beam of light, using the array of micromirrors. The zone can be configured to project a graphic within the beam of light. The zone can include at least a 400:1 contrast ratio within at least a 20 degree by 10-degree field of view from the origin.