Vehicle Lighting Device with Diffusion Portion for Consistent Light Distribution
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Solution Overview
Problem
Vehicle lighting devices using LEDs face challenges in maintaining consistent light distribution characteristics across different colors, leading to undesirable changes in light emission patterns.
Innovation Solution
The implementation of a vehicle lighting device with a light emitting module that includes a substrate with strategically positioned first and second light emitting portions, each emitting white and red or amber light, respectively, along with a diffusion portion to uniformly distribute light and control brightness, allowing for selective color emission while minimizing changes in light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different light emitting diodes are used to emit different colors from different positions, then the lighting device can selectively emit multiple colors, but the light distribution characteristics change for each color
Solution Approach 1:
The patent combines multiple light emitting diodes (white light and red/amber light) into a single light emitting module with a common substrate and diffusion portion. This merging allows different colored lights to be emitted from the same physical location, eliminating the light distribution changes that occur when different LEDs emit from different positions.
Solution Approach 2:
The diffusion portion acts as an intermediary element that receives light from both the white light emitting diode and the red/amber light emitting diode. By diffusing the light from both sources through a common diffusion structure, the patent achieves uniform light distribution characteristics regardless of which color is emitted.
2Adaptability or versatility
If multiple light emitting diodes are positioned at different locations to achieve different colors, then color versatility is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple light emitting diodes and their control circuits into a single integrated light emitting module. By combining the white light LED, red/amber light LED, and diffusion portion into one module, the patent reduces the overall device complexity compared to having separate lighting devices or modules for different colors.
Solution Approach 2:
The light emitting module is designed as a universal component that can emit multiple colors (white and red/amber) through a single structure. The control portion enables the module to selectively emit different colors based on driving signals, making the module multi-functional and reducing the need for separate specialized components.
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 enables the vehicle lighting device to selectively emit multiple colors with consistent light distribution characteristics, expanding its applications and improving reliability by stabilizing the light pattern across various color settings.
Implementation Method 1
a diffusion portion that has a light-transmitting property and covers the first light emitting portion and the second light emitting portion. The diffusion portion includes a diffusion material that diffuses the light emitted from the first light emitting portion and the second light emitting portion.
Data Source
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AI summary
According to one embodiment, a vehicle lighting device includes a flange portion; a storage portion that protrudes from one surface of the flange portion; and a light emitting module that is provided in an end portion of the storage portion on a side opposite to the flange portion side. The light emitting module includes a substrate; a first light emitting portion that is provided in the substrate, has a light emitting element, and emits white light; a second light emitting portion that is provided in the substrate, has a light emitting element, and emits red or amber light; a control portion that causes one of the first light emitting portion and the second light emitting portion to emit light; and a diffusion portion that has a light-transmitting property and covers the first light emitting portion and the second light emitting portion.