Automotive Lamp with Partial Color Filter for White Beam and Colored Appearance
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Solution Overview
Problem
Automotive headlight lamps struggle to provide a white illumination beam that also offers a colored appearance, as existing technologies either fail to achieve the desired color change in the peripheral light or exceed regulatory limits for color emission.
Innovation Solution
A halogen lamp with a partial color filter coating on the lamp vessel, where the color filter portion is strategically positioned to change the color of peripheral and scattered light, while the main illumination beam remains white by passing through a color transparent portion, ensuring compliance with regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a color filter is applied to the lamp vessel to change the light color, then the vehicle recognition is improved, but the illumination beam color may deviate from the white field specified in regulations
Solution Approach 1:
The lamp vessel is divided into two distinct regions: a first region with a color filter coating that imparts color to peripheral light, and a second region without color filter that allows white light to pass through for main illumination. This segmentation enables simultaneous achievement of colored vehicle recognition and compliant white illumination beam.
Solution Approach 2:
Different portions of the lamp vessel are assigned different optical properties: the first region (peripheral area) has color filtering properties for vehicle identification, while the second region (central area) maintains colorless transparency for regulated illumination. This local differentiation resolves the contradiction between colored appearance and white beam compliance.
2Ease of manufacture
If a full color filter coating is applied to the lamp vessel, then the vehicle recognition is improved, but the illumination beam will be colored and exceed regulatory limits
Solution Approach 1:
The lamp vessel is divided into two distinct regions: a first region with a color filter coating that imparts color to peripheral light, and a second region without color filter that allows white light to pass through for main illumination. This segmentation enables simultaneous achievement of colored vehicle recognition and compliant white illumination beam.
Solution Approach 2:
Different portions of the lamp vessel are assigned different optical properties: the first region (peripheral area) has color filtering properties for vehicle identification, while the second region (central area) maintains colorless transparency for regulated illumination. This local differentiation resolves the contradiction between colored appearance and white beam compliance.
3Illumination intensity
If no color filter is used, then the illumination beam remains white and compliant with regulations, but the vehicle cannot be recognized by light color
Solution Approach 1:
The lamp vessel is divided into two distinct regions: a first region with a color filter coating that imparts color to peripheral light, and a second region without color filter that allows white light to pass through for main illumination. This segmentation enables simultaneous achievement of colored vehicle recognition and compliant white illumination beam.
Solution Approach 2:
Different portions of the lamp vessel are assigned different optical properties: the first region (peripheral area) has color filtering properties for vehicle identification, while the second region (central area) maintains colorless transparency for regulated illumination. This local differentiation resolves the contradiction between colored appearance and white beam compliance.
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 lamp achieves a white illumination beam compliant with regulations while creating a colored appearance when viewed from angles other than directly forward, enhancing the visual effect without violating color emission standards.
Implementation Method 1
The lamp vessel comprises a first region having a color filter and a second region free from the color filter. The color filter has optical properties such that light passing through the color filter is emitted with a color change.
Implementation Method 2
light passing through the color filter is emitted with a color change; light passing through the color transparent portion is emitted without a color change
Data Source
Figure 1~2
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Figure 5
AI summary
A lamp 10 is described which may be used in an automotive headlight 12. The lamp 10 comprises at least one filament 20 within a transparent lamp vessel 16. A color filter portion 30 is provided through which light is emitted with a color change. The lamp vessel 16 further comprises a color transparent portion, through which light is emitted without a color change. The color transparent portion is arranged such that an illumination beam of light 40 is emitted through the color transparent portion to achieve a non-colored illumination. The color filter portion 30 is arranged such that only peripheral and/or scattered portions of light are emitted through the color filter portion to achieve a color appearance of the headlight 12 in operation of the lamp 10.