Lighting Device Opaque Division Plate Sensor Interference
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Solution Overview
Problem
Conventional lighting devices with sensors fail to accurately sense environmental luminance due to the sensor being affected by light emitted from the lighting elements, leading to incorrect activation and deactivation of the lighting.
Innovation Solution
An opaque division plate is installed between the lighting elements and the control circuit to block light emitted from the lighting elements, ensuring that the sensor only detects natural environmental light, preventing false luminance readings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sensor is directly installed inside the lighting device for compact integration, then the device structure is simplified and manufacturing is easier, but the lighting elements cast light on the sensor causing false luminance detection
Solution Approach 1:
The internal space of the lighting device is segmented into two distinct regions: a light-emitting region containing the lighting elements and a light-sensing region containing the sensor. This spatial segmentation prevents light from the lighting elements from reaching the sensor, eliminating false detection while maintaining integrated device structure.
Solution Approach 2:
A light-shielding plate is introduced as an intermediary component between the lighting elements and the sensor. This plate blocks light emitted by the lighting elements from reaching the sensor, ensuring that the sensor only detects environmental light and not light from the device itself.
2Volume of moving object
If the sensor is placed near the lighting elements for compact design, then the device size is reduced, but the sensor cannot accurately distinguish environmental light from self-emitted light
Solution Approach 1:
The device interior is divided into separate functional zones: a light-emitting zone and a light-sensing zone. This segmentation allows both components to be housed in a compact device while preventing optical interference, as the shielding plate creates distinct optical paths for emission and detection.
Solution Approach 2:
The light-shielding plate serves as an optical intermediary that selectively blocks light transmission from the lighting elements to the sensor while allowing the sensor to detect environmental light through other openings or paths, enabling accurate luminance sensing in a compact form factor.
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
This solution allows the lighting device to accurately respond to environmental luminance, ensuring proper activation and deactivation of the lighting elements without interference from self-emitted light, thereby providing adequate lighting in dark environments.
Implementation Method 1
The division plate is opaque, is mounted on the substrate, and is located between the control circuit and the multiple lighting elements
Data Source
AI summary
A lighting device includes a substrate, a control circuit, multiple lighting elements and an opaque division plate. The control circuit, the lighting elements and the division plate are mounted on the substrate. The control circuit has a sensor. The lighting elements are electrically connected to the control circuit. The division plate is located between the control circuit and the lighting elements. Given the opaque division plate installed between the lighting elements and the control circuit, light emitted from the lighting elements fails to penetrate through the division plate and is thus not sensed by the sensor on the control circuit opposite to the lighting elements. Accordingly, when detecting a dark environmental luminance, the control circuit activates the lighting elements, and after the lighting elements are activated, light emitted from the lighting elements won't cast on the sensor to affect correct determination of the control circuit.