Adaptive Beam Headlamp Light Emitting Device Single-Layer Wiring
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Solution Overview
Problem
Existing light emitting devices for adaptive driving beam headlamps require complex multilayer wiring configurations, leading to increased size, manufacturing costs, and reduced miniaturization, making it difficult to achieve high-density mounting and precise control of light emitting elements.
Innovation Solution
A light emitting device with a single-layer substrate and segmented second wiring structure, allowing independent control of light emitting elements through a matrix circuit, enabling efficient heat dissipation and precise light distribution patterns without the need for multilayer wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multilayer wiring is used to individually control light emitting elements, then individual turning on and off is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The second wiring layer is segmented into multiple independent wiring members (second first wiring members and second second wiring members) that can be independently controlled. This segmentation allows individual light emitting elements to be controlled separately while maintaining a relatively simple single-layer substrate structure, thus achieving individual control without excessive complexity
Solution Approach 2:
The patent combines multiple wiring functions into a single substrate layer by using both first and second wiring members in one layer, eliminating the need for separate multilayer wiring structures. This merging approach reduces device complexity while maintaining individual control capability
2Quantity of substance
If multilayer wiring is implemented for high-density mounting, then individual light element control is possible, but substrate size increases
Solution Approach 1:
The patent transitions from vertical multilayer wiring to a two-dimensional single-layer wiring arrangement with both first and second wiring members. This dimensional change allows high-density mounting of light emitting elements on a smaller substrate area by efficiently utilizing the planar space through the segmented wiring structure
3Ease of manufacture
If ceramic firing is used for multilayer wiring, then wiring structure is formed, but dimensional accuracy decreases due to shrinkage
Solution Approach 1:
The patent extracts the problematic ceramic firing process from the wiring structure formation and replaces it with alternative manufacturing methods that do not involve high-temperature firing. This extraction eliminates the shrinkage-induced dimensional inaccuracy while still achieving the required wiring structure through other fabrication techniques
4Illumination intensity
If high-density mounting is achieved for high brightness, then light output is improved, but wiring pattern dimensional accuracy becomes difficult to maintain
Solution Approach 1:
The second wiring is segmented into multiple independent wiring members that can be precisely positioned and controlled. This segmentation allows for high-density mounting of light emitting elements to achieve high brightness while maintaining manufacturing precision through the modular, independently controllable wiring structure that reduces the complexity of precise patterning
Data Source
AI summary
A light distribution method is for an adaptive driving beam headlamp system including a light emitting device, an on-board camera and an electronic control unit. The light distribution method includes: obtaining data indicative of a state in front of a vehicle by the on-board camera; computing one or more of: attributes of an object in front of the vehicle; attributes of a vehicle ahead; a speed of the vehicle ahead; a distance between vehicles; brightness of the object; and a road shape; determining a light distribution pattern; determining a control amount indicative of at least one of an ON or OFF state of each of the light emitting elements and an applied power to each of the light emitting elements according to the light distribution pattern determined; and controlling driving of the adaptive driving beam headlamp system based on the control amount determined.