Sensor-Controlled Light Device with Rear Radar Sensor
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Solution Overview
Problem
Generic sensor-controlled lighting devices suffer from uneven light distribution and visibility of the sensor due to shading, affecting both functionality and aesthetic appeal.
Innovation Solution
A lighting device design featuring a high-frequency radar sensor positioned on the rear side of a luminous surface device with a uniform brightness distribution, utilizing edge-side light coupling and an optically effective pattern to scatter light diffusely, along with a color layer arrangement and reflection arrangement to ensure uniformity and conceal the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the sensor is attached adjacent to the lighting unit in the lighting device, then the device can be manufactured and installed compactly as an integrated unit, but the sensor causes shadowing on the light exit surface resulting in uneven brightness distribution
Solution Approach 1:
The sensor is extracted from the light emission area and positioned in a separate housing section that is optically isolated from the light exit surface. This separation eliminates the shadowing effect while maintaining the integrated compact design, as the sensor housing is distinctly separated from the luminous surface device.
Solution Approach 2:
An optical separation structure is introduced as an intermediary between the sensor and the light exit surface. This structure prevents direct optical interaction between the sensor and the light path, allowing both components to coexist in a compact integrated unit without the sensor causing shadowing on the light distribution.
2Device complexity
If the sensor is positioned in the emission area of the lighting unit, then integration is simplified, but the sensor becomes visible and the sensor functionality can be easily manipulated
Solution Approach 1:
The sensor is extracted from the visible light emission area and placed in a separate housing section that is optically isolated from the light exit surface. This separation maintains functional integration while preventing direct visual access to the sensor, thereby reducing the risk of manipulation and improving reliability.
Solution Approach 2:
An optical separation structure serves as an intermediary that blocks direct visual access to the sensor from the light exit surface. This intermediary structure allows the sensor to remain integrated in the device while preventing visibility and potential manipulation, thus enhancing security without increasing integration complexity.
3Ease of manufacture
If the sensor is mounted visibly on the lamp housing, then installation is simplified, but the aesthetic appearance of the lamp device is impaired
Solution Approach 1:
The sensor housing is merged with the overall device housing to create a unified, aesthetically pleasing appearance. The sensor is positioned within the housing structure rather than mounted externally, allowing it to be integrated into the design without compromising aesthetic appearance while maintaining installation simplicity.
Solution Approach 2:
The housing structure serves as an intermediary that conceals the sensor while maintaining its functional accessibility. The sensor is positioned within the housing in a way that integrates it into the overall design, eliminating the need for external mounting and thus preserving aesthetic appearance without complicating installation.
4Volume of moving object
If the sensor is positioned close to the lighting unit for integration, then compact design is achieved, but the sensor is irradiated with light causing visibility and potential manipulation
Solution Approach 1:
The sensor is extracted from the direct light path while remaining in close proximity for compact integration. By positioning the sensor in a separate housing section that is optically isolated from the light exit surface, the device maintains compactness without subjecting the sensor to harmful light irradiation that would cause visibility and manipulation risks.
Solution Approach 2:
An optical separation structure acts as an intermediary that blocks light from reaching the sensor while allowing the sensor to remain in close proximity for compact design. This intermediary prevents harmful light irradiation on the sensor, eliminating visibility and manipulation risks without compromising device compactness.
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 achieves a uniform light distribution and conceals the sensor, enhancing both functionality and aesthetic appeal by eliminating shading and visibility issues.
Implementation Method 1
A light-emitting surface device accommodated in the light housing of the lighting device is designed to receive a light emitted by the light-emitting unit, forward a received light within the light-emitting surface device and emit a light forwarded in the light-emitting surface device from or from a light exit surface of the light-emitting surface device
Implementation Method 2
an optically effective pattern to scatter light diffusely
Implementation Method 3
reflection arrangement to ensure uniformity and conceal the sensor
Data Source
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AI summary
The invention provides a sensor-controlled lighting device (1) comprising a lighting housing (2), a lighting unit (3), a light surface assembly (4) for receiving light emitted by the lighting unit (3), forwarding received light within the light surface assembly (4), and emitting forwarded light from a light-emitting surface (5) of the light surface assembly, a high-frequency radar sensor (6) for detecting movement and/or the presence of an object in a detection area (26) outside the lighting housing, and a control device for influencing an operating state of the lighting unit depending on movement and/or the presence of an object detected by the high-frequency radar sensor (6) in the detection area. The high-frequency radar sensor (6) is arranged in the lighting housing on a rear side opposite the light-emitting surface of the light surface assembly.The luminaire (4) is designed to receive the light emitted by the luminaire on at least one edge surface of the luminaire and is designed such that the light emission surface has a uniform brightness distribution in the activated operating state of the luminaire.