3D Image Sensing Device Flicker Noise Cancellation
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Solution Overview
Problem
Current two-dimensional image processing systems for gesture recognition lack depth information, limiting their gesture recognition capabilities, and existing solutions fail to integrate ambient visible light, proximity, color temperature, and temperature sensors efficiently into mobile devices, increasing costs and board space requirements.
Innovation Solution
A three-dimensional image sensing device and method that incorporates a light source, sensing module, and signal processing module, where the light source generates flashing light at a frequency multiple or predetermined frequency to cancel flicker noise, enabling depth information generation and integrating multiple sensors into a single integrated circuit for efficient gesture recognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple sensors (ambient visible light sensor, proximity sensor, color temperature sensor, and temperature sensor) are integrated into the same integrated circuit, then device complexity and board space requirements are reduced, but manufacturing precision and reliability requirements increase
Solution Approach 1:
The patent merges multiple sensors (ambient visible light sensor, proximity sensor, color temperature sensor, and temperature sensor) into a single integrated circuit, reducing board space requirements and device complexity while managing the increased manufacturing precision requirements through unified integration
2Object-affected harmful factors
If a light source generates flashing light with K multiple of flicker noise frequency, then ambient visible light noise is canceled, but device complexity and power consumption increase
Solution Approach 1:
The light source generates flashing light at periodic intervals with a frequency that is K multiple of the flicker noise frequency, creating a periodic modulation that enables noise cancellation through frequency-domain separation. This periodic action allows the system to distinguish between the modulated signal and ambient noise
Solution Approach 2:
The patent converts the harmful flicker noise from ambient visible light into a beneficial reference frequency. By modulating the light source at K times the flicker noise frequency, the system uses the noise frequency itself as a reference to identify and cancel the harmful ambient light interference through spectral analysis
3Measurement precision
If depth information is added to gesture recognition, then gesture recognition capability is improved, but device complexity and cost increase
Solution Approach 1:
The integrated circuit performs multiple functions including depth sensing, gesture recognition, and noise cancellation using a unified sensor array and processing architecture. The same sensor hardware that captures depth information also participates in gesture recognition, eliminating the need for separate dedicated systems and reducing overall device complexity
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 reduces costs and increases efficiency by canceling ambient visible light noise, enhancing depth sensing and gesture recognition capabilities while minimizing board space and power consumption.
Implementation Method 1
The light source is used for generating flashing light with a K multiple of a frequency of flicker noise or a predetermined frequency
Implementation Method 2
the light source is used for generating flashing light with a K multiple of a frequency of flicker noise or a predetermined frequency... to cancel noise of ambient visible light
Implementation Method 3
The pixel array is used for sampling the flashing light to generate a sampling result
Implementation Method 4
The control unit is used for executing an image processing on the sampling result to generate a spectrum corresponding to the sampling result
Data Source
AI summary
A three-dimensional image sensing device includes a light source, a sensing module, and a signal processing module. The sensing module includes a pixel array, a control unit, and a light source driver. The light source generates flashing light with a K multiple of a frequency of flicker noise or a predetermined frequency. The pixel array samples the flashing light to generate a sampling result. The control unit executes an image processing on the sampling result to generate a spectrum. The light source driver drives the light source according to the K multiple of the frequency or the predetermined frequency. The signal processing module generates the K multiple of the frequency according to the spectrum, or outputs the predetermined frequency to the light source driver, and generates depth information according to a plurality of first images/a plurality of second images during turning-on/turning-off of the light source included in the sampling result.