Structured Light Emitter Module with Movable Lens for Tilt Compensation
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Solution Overview
Problem
Structured light emitter modules in electronic devices are prone to erroneous light pattern generation when tilted or shaken, leading to false identification in facial recognition and other applications.
Innovation Solution
A structured light emitter module design featuring a flexible-rigid circuit board, a laser source, a carrier, a driver, an optical lens, and an optical diffraction component, where the driver, such as a thermal, piezoelectric, or micro-electric motor driver, adjusts the position of the optical lens to maintain a stable light pattern, ensuring accurate light projection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the structured light emitter module is tilted or shaken, then the light pattern becomes erroneous, but facial recognition accuracy deteriorates
Solution Approach 1:
The patent implements a movable optical lens that can dynamically adjust its position along the optical axis in response to tilt or shake detection. This dynamic adjustment compensates for the effects of device movement, maintaining proper focus and light pattern structure despite external disturbances, thereby resolving the contradiction between reliability under motion and measurement precision.
2Reliability
If the optical lens position is fixed, then the device structure is simple, but the light pattern becomes unstable when tilted
Solution Approach 1:
The patent introduces a movable optical lens with adjustable position along the optical axis, transforming the fixed optical system into a dynamic one. This allows the system to adapt to tilt and shake conditions by adjusting the lens position, maintaining light pattern consistency while accepting increased structural complexity.
3Measurement precision
If the laser irradiation range is not adjusted, then the device operation is simple, but false identification occurs when shaken
Solution Approach 1:
The patent implements a feedback control system where the position of the optical lens is adjusted based on detected tilt or shake conditions. This feedback mechanism automatically modifies the laser irradiation range and focus to maintain accurate facial recognition, eliminating false identification while managing operational complexity through automation.
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 module maintains a consistent speckle pattern even when tilted or shaken, enhancing the accuracy of facial recognition and other structured light-based applications by adjusting the laser irradiation range effectively.
Implementation Method 1
an optical lens, and an optical diffraction component, where the driver, such as a thermal, piezoelectric, or micro-electric motor driver, adjusts the position of the optical lens to maintain a stable light pattern
Implementation Method 2
an optical lens, and an optical diffraction component, where the driver, such as a thermal, piezoelectric, or micro-electric motor driver, adjusts the position of the optical lens to maintain a stable light pattern
Data Source
AI summary
A structured light emitting module which gives an adjustable and resettable patterned structure to the laser light emitted comprises a laser source, a structured light lens, an optical diffraction element, and a driver. The optical diffraction element is located above the laser source, and the lens and the optical diffraction element cooperate to convert the laser into a speckled or other pattern. The lens is disposed in the driver, the driver can move the lens microscopically to change an illumination range or the structure of the patterned laser light which is output.