Ranging Processing Device Dynamic Phase Switching
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Solution Overview
Problem
Existing ranging modules in mobile terminals face challenges in improving frame rate, power consumption, and data transfer bandwidth while maintaining accurate distance measurement performance.
Innovation Solution
A ranging processing device and module that employ a four-phase and two-phase ranging operation unit to calculate depth by distributing charges from irradiated light phases to taps, using detection signals to determine the distance and switch between operation modes based on condition determination, thereby optimizing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If four-phase ranging operation is used to calculate depth using all eight detection signals, then measurement precision is improved, but processing time increases and frame rate decreases
Solution Approach 1:
The patent implements dynamic switching between four-phase and two-phase ranging operations based on scene conditions. The condition determination unit evaluates detection signals to decide whether to use the computationally intensive four-phase method (for static scenes requiring high precision) or the faster two-phase method (for dynamic scenes prioritizing frame rate), making the system adaptable to different operational requirements
Solution Approach 2:
The patent changes the operational parameters of the ranging system by switching between different phase configurations. By adjusting the number of phases from four to two based on scene stability, the system optimizes the balance between measurement precision and processing speed, effectively managing the trade-off between accuracy and frame rate
2Measurement precision
If four-phase ranging operation is used with all eight detection signals, then depth calculation accuracy is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts its computational workload by switching between four-phase and two-phase operations. When the scene is determined to be static, the energy-intensive four-phase calculation is performed for high accuracy. When motion is detected, the system transitions to the lower-power two-phase operation, effectively managing power consumption based on actual measurement needs
Solution Approach 2:
The patent changes the operational parameter of phase count from four to two based on scene conditions. This parameter change directly impacts power consumption, as fewer phases require less computational processing. The condition determination unit monitors scene stability and adjusts the phase parameter accordingly, optimizing the energy-accuracy trade-off
3Measurement precision
If four-phase ranging operation processes all eight detection signals, then measurement accuracy is improved, but data transfer bandwidth requirements increase
Solution Approach 1:
The patent implements dynamic data processing by switching between processing all eight detection signals (four-phase) or only four detection signals (two-phase). The condition determination unit assesses scene stability and dynamically adjusts the data processing workload, reducing bandwidth requirements when full precision is not necessary while maintaining high accuracy when the scene is static
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 solution enhances the frame rate, reduces power consumption, and narrows data transfer bandwidth while maintaining accurate distance measurements by effectively utilizing detection signals from multiple light phases.
Implementation Method 1
charges generated by irradiating irradiated light of first to fourth phases onto an object and receiving reflected light reflected by the object
Data Source
AI summary
A ranging processing device includes: a four-phase ranging operation unit that performs an operation to calculate depth indicating a distance to an object by using all eight detection signals two of which are detected for each of irradiated light of first to fourth phases; a two-phase ranging operation unit that performs the operation to calculate the depth indicating the distance to the object by alternately using four detection signals based on the irradiated light of the first phase and the irradiated light of the second phase and four detection signals based on the irradiated light of the third phase and the irradiated light of the fourth phase among the eight detection signals; and a condition determination unit that makes condition determination based on the detection signals and switch between the four-phase ranging operation unit and the two-phase ranging operation unit to be used.