Integrated Proximity and Light Sensor Module
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Solution Overview
Problem
Portable devices with separate proximity and light sensors require multiple openings in the housing, increasing complexity and reducing design flexibility.
Innovation Solution
A combined proximity and ambient light sensor system using a single emitter and two sensors, where the output from the emitter is processed to subtract its effect, allowing detection of ambient light without additional openings, and a shared sensor configuration for both proximity and light sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate proximity sensor and light sensor are used, then sensing functions are achieved, but device complexity increases due to multiple openings required in housing
Solution Approach 1:
The patent combines a proximity sensor and an ambient light sensor into a single integrated sensor module. The proximity sensor includes an infrared emitter and detector, while the ambient light sensor uses a photodetector with a different spectral response. Both sensors share common structural elements including a single opening in the housing, a shared filter structure, and integrated circuit board mounting, thereby reducing housing complexity while maintaining both sensing functions
Solution Approach 2:
The integrated sensor module serves multiple functions through a single housing opening. The same opening that allows infrared radiation for proximity detection also permits visible light for ambient light sensing. The shared filter structure and photodetector elements enable the system to distinguish between different wavelengths, achieving multi-functionality without requiring separate openings for each sensor type
2Adaptability or versatility
If separate proximity sensor and light sensor are used, then sensing functions are achieved, but manufacturing complexity increases
Solution Approach 1:
The patent integrates multiple sensor functions into a single modular assembly that can be manufactured as one unit. The proximity sensor and ambient light sensor share common components including the housing opening, filter structures, and circuit board integration. This unified approach simplifies the manufacturing process by reducing the number of separate assembly operations required compared to installing two independent sensor modules
Solution Approach 2:
The sensor module is designed with distinct functional segments that can be manufactured separately and then integrated. The proximity sensing portion with its infrared emitter and detector is segmented from the ambient light sensing portion with its photodetector, yet both segments share common structural elements. This segmentation allows for specialized manufacturing of each sensor type while maintaining ease of assembly through shared mounting structures and alignment features
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
Enables efficient detection of proximity and ambient light with reduced hardware requirements, improving design compactness and user experience by automating device settings based on sensor data.
Implementation Method 1
an emitter of electromagnetic radiation (e.g., IR light)
Implementation Method 2
emitter of electromagnetic radiation (e.g. IR light)
Implementation Method 3
a detector of electromagnetic radiation from the emitter when the sensor is sensing proximity
Implementation Method 4
The detector is configured to detect electromagnetic radiation, such as infrared (IR) light, emitted from the emitter when the apparatus is configured to sense proximity
Data Source
AI summary
Apparatuses and methods to sense proximity and to detect light. In one embodiment, an apparatus includes an emitter of electromagnetic radiation and a detector of electromagnetic radiation; the detector has a sensor to detect electromagnetic radiation from the emitter when sensing proximity, and to detect electromagnetic radiation from a source other than the emitter when sensing visible light. The emitter may be disabled at least temporarily to allow the detector to detect electromagnetic radiation from a source other than the emitter, such as ambient light. In one implementation, the ambient light is measured by measuring infrared wavelengths. Also, a fence having a non-IR transmissive material disposed between the emitter and the detector to remove electromagnetic radiation emitted by the emitter. Other apparatuses and methods and data processing systems and machine readable media are also described.