Vehicle Headlight Optical Diaphragm Trim Edges
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Solution Overview
Problem
Modern vehicle headlight systems using LED light units face challenges in creating a sharp, adjustable light pattern with homogeneous intensity, as existing technologies struggle to control light beam direction and intensity effectively, leading to diffused edges and reduced mechanical design flexibility.
Innovation Solution
A light device with a system of optical directing elements, diaphragms, and trim edges that shape the light beam cross-section, allowing for adjustable light patterns with sharp or blurred edges, and enabling efficient optical system adjustment within compact installation spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a high number of LED light sources are used to increase light output, then the light intensity is improved, but the difficulty of directing light beams and creating a suitable light pattern increases
Solution Approach 1:
The optical system is segmented into multiple functional elements: LED light sources, collimating optical elements, diaphragms with openings, and lens diaphragms. Each segment performs a specific function in controlling and shaping the light beam, making the overall system more manageable despite using multiple LED sources.
Solution Approach 2:
Collimating optical elements and diaphragms act as intermediary components between the LED light sources and the output. These intermediaries control and direct the light beams from multiple LEDs, combining them into a suitable light pattern without requiring direct control of each individual LED beam.
2Illumination intensity
If lens diaphragms with sets of openings are used to control light passage, then the light pattern is improved, but the installation space requirements increase
Solution Approach 1:
The optical system utilizes the optical axis dimension efficiently by arranging collimating optical elements and diaphragms in sequence along the light path. This linear arrangement along the optical axis allows for compact integration of multiple components without significantly increasing lateral installation space.
3Volume of stationary object
If the optical axis is shortened to reduce installation space, then the mechanical design flexibility is improved, but the emission characteristics of the light trace deteriorate
Solution Approach 1:
The system allows for adjustment of the optical axis length as a variable parameter. By optimizing the distances between optical elements (collimating elements, diaphragms, and output lens), the system maintains proper emission characteristics while adapting to different installation space constraints. The focal distances and element positions can be tuned to achieve the desired balance.
4Manufacturing precision
If a sharp transition between lit and unlit parts is created, then the light pattern definition is improved, but the human eye perception of the unlit part is reduced
Solution Approach 1:
The diaphragms with sets of openings provide localized control over light passage. By strategically positioning and sizing the openings in the diaphragms, the system creates specific sharp transitions in certain areas while maintaining overall light pattern control, allowing selective sharpness in different regions of the light trace.
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 the creation of sharp or blurred light transitions with homogeneous intensity distribution, enhancing the mechanical design flexibility and optical performance of vehicle headlights.
Implementation Method 1
collimating optical elements for concentration of rays of the light units to the direction of the light axis of the vehicle
Implementation Method 2
reflective diaphragms which are fitted with reflective surfaces for reflection of light beams concentrated by the collimating optical elements to the direction of the optical axis of the light device
Implementation Method 3
an output lens through which the light rays pass to create a light pattern on a display surface
Data Source
AI summary
A light device, especially a headlight of motor vehicles, comprises at least one light unit (1), or a group (1a, 1b) of light units, at least one optical directing element (3, 2e, 3f), adapted to direct the light beam emitted by the light unit, or group of light units, to the required direction, and at least one output lens (4) for passage of at least a part of the light rays of the light beam or beams to create a light pattern (A, B, C) on the display surface (ZY). On the route of the light beam between the optical directing element and the output lens, there is at least one optical diaphragm element (11, 21, 31) containing a system of trim edges (13, 23, 33) to create the required shape of the cross-section of a part or parts of the light beam designed for transmission along the above-mentioned route.