Variable Frame Rate Scanner for Distance Detection
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Solution Overview
Problem
Current distance detection apparatuses face challenges in achieving variable spatial resolution for accurate distance information, particularly in varying distances to external objects, which affects precision and convenience in applications like mobile terminals and image display systems.
Innovation Solution
A distance detection apparatus incorporating a light source unit, scanner, and processor that varies the frame rate or scanning angles of the scanner to adjust spatial resolution, allowing for improved precision in distance information acquisition based on user input or object movement detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the frame rate of the scanner is decreased to increase spatial resolution, then measurement precision is improved, but productivity deteriorates due to slower scanning speed
Solution Approach 1:
The patent applies dynamics by making the frame rate variable rather than fixed. The processor dynamically adjusts the frame rate of the scanner based on detected object characteristics - using lower frame rates for stationary objects to achieve high spatial resolution, and higher frame rates for moving objects to maintain tracking capability. This resolves the contradiction by adapting the scanning speed to the actual measurement needs.
Solution Approach 2:
The patent changes the frame rate parameter according to the measurement requirements. By varying the frame rate between high and low values depending on whether objects are stationary or moving, the system achieves high spatial resolution when needed while maintaining overall productivity through faster scanning during appropriate conditions.
2Measurement precision
If the scanning angles are decreased to increase spatial resolution, then measurement precision is improved, but the scan area coverage deteriorates
Solution Approach 1:
The patent makes the scanning angles dynamic by adjusting them based on the measured distance to external objects. When objects are closer and require higher spatial resolution, the scanning angles are decreased. When objects are farther away or multiple objects need monitoring, the scanning angles are increased to expand coverage. This dynamic adjustment resolves the contradiction between resolution and coverage.
Solution Approach 2:
The system changes the scanning angle parameter according to distance measurements and detection requirements. By varying the scanning angles, the apparatus optimizes spatial resolution for nearby objects while maintaining adequate coverage for the overall environment, thus resolving the trade-off between precision and coverage area.
3Productivity
If the frame rate is increased to improve scanning speed, then productivity is improved, but measurement precision deteriorates due to reduced sampling density
Solution Approach 1:
The patent applies dynamics by using high frame rates only when necessary - specifically when tracking moving objects or when rapid environmental monitoring is required. For stationary objects or during periods when high-speed scanning is not needed, the system switches to lower frame rates to maximize spatial resolution. This dynamic switching resolves the contradiction between speed and precision.
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 enables increased spatial resolution for distance information by adjusting the frame rate or scanning angles, enhancing user convenience and precision in detecting distances to external objects, particularly in applications like mobile terminals and image display systems.
Implementation Method 1
a light source unit configured to output light to detect a distance to an external object
Data Source
AI summary
The present invention relates to a distance detection apparatus for acquiring distance information having variable spatial resolution and an image display apparatus having the same. A distance detection apparatus according to an embodiment of the present invention comprises a light source unit for outputting an output light to detect a distance to an external object, a scanner for performing first direction scanning and second direction scanning to output an output light to an external scan area, a light detection unit for receiving an input light from the scan area, and a processor for detecting a distance to an external object within the external scan area on the basis of the output light and the input light, wherein the processor makes a control to change a frame rate of the scanner and acquires distance information having varied spatial resolution of the external object in accordance with the change in the frame rate. Accordingly, it is possible to acquire distance information having variable spatial resolution on an external object.