Distance Imaging Light Control for Accuracy and Lower Power
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Solution Overview
Problem
Existing ranging apparatuses face challenges in improving distance information accuracy while minimizing power consumption, particularly due to increased power demands from higher light source cycles for longer distances.
Innovation Solution
A ranging apparatus that adjusts light emission settings and irradiated regions based on distance ranges, using different light emission settings and irradiation strategies to optimize power usage and enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of cycles of irradiated light is increased to improve distance information accuracy for farther objects, then the quality of distance image is improved, but power consumption by the light source increases
Solution Approach 1:
The patent divides the ranging object region into multiple distance segments along the depth direction. Different light emission settings are applied to different segments, allowing optimized power consumption for each region while maintaining overall measurement accuracy.
Solution Approach 2:
The patent applies different light emission settings to different distance segments. Closer segments receive light with certain parameters while farther segments receive light with adjusted parameters, optimizing both accuracy and power consumption locally for each region.
2Measurement precision
If the number of cycles of irradiated light is increased to compensate for weaker reflected light from farther objects, then the quality of distance image is improved, but power consumption by the light source increases
Solution Approach 1:
The patent dynamically adjusts light emission settings based on the distance segment being measured. The light source portion changes its emission parameters in response to feedback about the ranging object's position, optimizing power usage for each distance range.
Solution Approach 2:
The patent changes light emission parameters such as intensity, duration, or frequency based on the target distance segment. This allows the system to use more cycles for farther objects where reflected light is weaker, while using fewer cycles for closer objects, thereby reducing overall power consumption.
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 apparatus achieves improved distance information accuracy with reduced power consumption by adapting light emission and irradiation based on distance, enhancing efficiency and image quality.
Implementation Method 1
a light source portion 101 which emits light
Implementation Method 2
receive reflected light of the light having been emitted from the light source portion and reflected by an object
Data Source
AI summary
A ranging apparatus includes a light source portion which emits light, a setting portion which performs light emission setting of the light source portion, a light receiving portion which receives reflected light of the light emitted from the light source portion and reflected by an object, and a generating portion which generates a distance image using the reflected light received by the light receiving portion. The distance image is made up of a plurality of sub-frames of distance images, in a process of generating the plurality of sub-frames, the setting portion performs first light emission setting when performing ranging of a first distance range and performs second light emission setting when performing ranging of a second distance range, and the first light emission setting and the second light emission setting include setting of an irradiated region of the light emitted by the light source portion.