Vehicle Rear Lamp Wavelength Filtering
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Solution Overview
Problem
Conventional rear lamp systems for vehicles require separate components and compartments, which can complicate installation and reduce design flexibility, and they do not effectively secure a visual field outdoors through lighting without interfering with the interior visual field.
Innovation Solution
A rear lamp apparatus that includes a light source emitting a specific wavelength band, a light filter reflecting one wavelength and transmitting another, and a light diffraction element to direct light externally while preventing internal transmission, allowing for a unified design on the rear glass and enhanced visual field security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional rear lamp system with separate components and compartments is used, then the lamp can be installed with standardized structure, but the installation complexity increases and design flexibility is reduced
Solution Approach 1:
The patent integrates the light source, light filter, and rear glass into a unified structure where the light filter is directly disposed on the rear glass. This merging of components eliminates the need for separate compartments and complex installation procedures while maintaining full functional capability of the rear lamp system.
2Illumination intensity
If light is emitted toward the exterior for visibility, then external visibility is improved, but light may interfere with the interior visual field
Solution Approach 1:
The light filter is designed with wavelength-selective properties that allow it to reflect light within a specific first wavelength band (preventing interior interference) while transmitting light in a second wavelength band (maintaining exterior visibility). This local quality differentiation at the optical level resolves the contradiction between external illumination and interior visual field protection.
Solution Approach 2:
The patent utilizes wavelength as a distinguishing parameter to separate the light paths. By filtering based on wavelength bands, the system allows certain wavelengths to pass to the exterior while reflecting other wavelengths back, thereby changing the optical parameters to simultaneously achieve external visibility and interior visual field protection.
3Object-affected harmful factors
If the light filter reflects light to prevent interior transmission, then interior visual field is protected, but external lighting effectiveness may be reduced
Solution Approach 1:
The light filter operates by changing the wavelength parameter of light, reflecting the first wavelength band while transmitting the second wavelength band. This parameter-based differentiation ensures that protection of the interior visual field does not compromise external lighting effectiveness, as different wavelength bands serve different functions.
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 enables a more integrated and flexible rear lamp design that secures both exterior and interior visual fields by directing light externally while preventing internal interference, allowing for improved external visibility and design freedom.
Implementation Method 1
a light filter disposed with a first side facing an exterior of the vehicle and a second side facing an interior of the vehicle, configured to reflect light having a first wavelength band, and transmit light having a second wavelength band that is different from the first wavelength band
Implementation Method 2
transmit light having a second wavelength band that is different from the first wavelength band
Implementation Method 3
a light diffraction element configured to receive light emitted from the light source and adjust a transmission path of incident light to direct the light to be incident to the first side of the light filter
Data Source
AI summary
A rear lamp apparatus of a vehicle is provided. The apparatus includes a light source that emits light having a first wavelength band, a light filter disposed with a first side facing an exterior and a second side facing an interior, that reflects light having the first wavelength band, and transmits light having a second wavelength band that is different from the first wavelength band. A light diffraction element is disposed to receive light emitted from the light source and changes a transmission path of incident light to direct. The light emitted is transmitted to the first side of the light filter by the light diffraction element and is reflected to be directed toward the exterior of the vehicle to prevent the transmission to the interior of the vehicle. Accordingly, a rear lamp is turned on at a side of rear glass and exterior and interior visual fields are improved.