DMD Headlamp PCB Layout for Symmetry and Glare Prevention
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Solution Overview
Problem
Conventional digital micromirror device (DMD) headlamps face issues with component placement, leading to asymmetrical structures, interference between cables and connectors, and increased complexity in assembly, which affects the reliability and glare prevention in adaptive driving beam systems.
Innovation Solution
Optimized component placement in the DMD headlamp with a reflector unit, a DMD board featuring a digital micromirror unit, control unit, power supply unit, and outside connecting connector on a Printed Circuit Board (PCB), where the outside connecting connector is positioned at the lower end of the DMD board closer to the low beam headlamp, and the digital micromirror unit is disposed above the control unit to minimize cable length differences and prevent glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the outside connecting connector is disposed on the conventional DMD board, then the headlamp can be assembled, but the symmetrical structure is distorted and cable shaping becomes complicated
Solution Approach 1:
The patent applies asymmetry by deliberately positioning the outside connecting connector at the lower end of the DMD board rather than using a symmetrical placement. This asymmetric positioning at the lower end allows both left and right headlamps to have identical connector locations, enabling standardized cable routing and simplifying assembly while maintaining overall system symmetry through consistent asymmetric design.
2Reliability
If the outside connecting connector is disposed on the DMD board, then electrical connection is achieved, but interference occurs and reliability decreases
Solution Approach 1:
The patent resolves the interference problem by transitioning the connector placement from a lateral position (adjacent to the low beam headlamp) to a longitudinal position (at the lower end of the DMD board). This dimensional change in placement strategy separates the connector and its cable from the interference zone near the low beam headlamp, eliminating harmful electromagnetic interference while maintaining reliable electrical connections.
3Ease of manufacture
If components are placed on the DMD board, then all necessary functions are integrated, but assembly complexity increases
Solution Approach 1:
The patent applies universality by designing the DMD board with all necessary components (digital micromirror unit, control unit, power supply unit, and outside connecting connector) integrated into a single standardized platform. The standardized positioning of these components, particularly the connector at the lower end, creates a universal assembly pattern that simplifies manufacturing and assembly processes while reducing overall system complexity.
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 configuration reduces assembly complexity, maintains a symmetrical structure, and optimally disposes the digital micromirror unit to prevent glare, enhancing the reliability and performance of the DMD headlamp.
Implementation Method 1
a reflector unit reflecting light emitted from a light source
Implementation Method 2
a digital micromirror unit... to reflect the light to a projection lens
Data Source
AI summary
A DMD headlamp disposed at a lower end of a low beam headlamp includes: a reflector unit reflecting light emitted from a light source; and a DMD board that includes a digital micromirror unit, a control unit, a power supply unit, and an outside connecting connector disposed on a Printed Circuit Board (PCB), the DMD board being disposed in an area to which light is reflected from the reflector unit to reflect the light to a projection lens, The outside connecting connector is disposed at the lower end of the DMD board so that a distance from a center point of the outside connecting connector to the lower end of the DMD board is smaller than a distance from the center point of the outside connecting connector to the upper end of the DMD board.