Bi-function LED Headlamp Thin Shield Actuator Elimination
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Solution Overview
Problem
Conventional bi-function head lamps for vehicles face issues with noise generation, increased cost, and weight due to actuators, and struggle to satisfy signal reflection requirements when using LEDs without a movable shield.
Innovation Solution
A bi-function LED head lamp design utilizing a thin shield that partitions the reflector space into upper and lower regions for low and high beams, eliminating the need for an actuator by integrating a semicircular hole in the shield and a signal reflection surface with the lens holder to control light patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an actuator is used to switch between low beam and high beam, then beam switching function is achieved, but noise generation increases, cost increases, and weight increases
Solution Approach 1:
The invention extracts and removes the actuator component from the headlamp system. Instead of using an actuator to move the shield, the patent employs a fixed shield structure with strategically positioned holes that can be selectively illuminated by LED modules. This extraction eliminates the actuator's weight, noise, and cost while achieving the same beam switching function through optical control.
Solution Approach 2:
The invention replaces the mechanical actuator system with an optical control system. The shield position switching that would traditionally require mechanical movement is instead achieved by selectively activating different LED modules that illuminate through predetermined holes in the shield, creating low beam or high beam patterns without any mechanical motion.
2Adaptability or versatility
If an actuator is used to switch between low beam and high beam, then beam switching function is achieved, but noise generation increases, cost increases, and weight increases
Solution Approach 1:
The invention extracts and removes the actuator component from the headlamp system. Instead of using an actuator to move the shield, the patent employs a fixed shield structure with strategically positioned holes that can be selectively illuminated by LED modules. This extraction eliminates the actuator's weight, noise, and cost while achieving the same beam switching function through optical control.
Solution Approach 2:
The invention replaces the mechanical actuator system with an optical control system. The shield position switching that would traditionally require mechanical motion is instead achieved by selectively activating different LED modules that illuminate through predetermined holes in the shield, creating low beam or high beam patterns without any mechanical motion.
3Device complexity
If a shield is fixed at the existing position without an actuator, then device complexity is reduced, but signal reflection surface positioning becomes impossible and signal regulation cannot be satisfied
Solution Approach 1:
The invention segments the shield structure into a fixed body with multiple predetermined holes positioned at specific locations. These holes are strategically placed to allow light from different LED modules to pass through and create distinct beam patterns. The segmentation allows the fixed shield to achieve what would otherwise require a movable shield, maintaining signal regulation compliance without adding complexity.
Solution Approach 2:
The shield is designed in advance with pre-positioned holes at optimal locations for signal reflection and beam pattern formation. This preliminary positioning during manufacturing ensures that when LEDs are selectively activated, the light passes through the correctly positioned holes to create compliant low beam and high beam patterns, eliminating the need for post-assembly adjustment or movable components.
4Adaptability or versatility
If multiple components (actuator, movable shield, separate reflectors) are used for bi-function LED head lamp, then beam switching and signal regulation are achieved, but part count increases and assembly tolerances increase
Solution Approach 1:
The invention merges multiple components into an integrated assembly. The shield is fixed to the reflector structure, eliminating the need for separate actuator mechanisms. The LED modules are positioned to work in conjunction with the shield's pre-positioned holes, creating a unified system where beam switching is achieved through electrical control of LEDs rather than mechanical movement of parts. This integration reduces part count and eliminates assembly tolerances associated with movable components.
Solution Approach 2:
The fixed shield structure serves multiple functions simultaneously: it acts as a light blocking element, defines beam patterns through its pre-positioned holes, and provides structural support for the LED modules. This multi-functionality eliminates the need for separate components that would traditionally perform these individual functions, reducing overall part count while maintaining bi-function capability.
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
Enables the implementation of low and high beams by simply turning on/off LEDs, reducing part count, assembly tolerances, and minimizing interference, while satisfying signal regulation requirements without the need for a moving actuator.
Implementation Method 1
a reflector in which a front inlet is opened and an inner space is partitioned into an upper low beam reflector space and a lower high beam reflector space by a partition installed at the center
Implementation Method 2
a shield installed at a front end of the partition... A hole through which the light passes may be bored at the front end of the shield
Implementation Method 3
a signal reflection surface installed at a lower inner end of the lens holder
Data Source
Figure 1
Figure 2
AI summary
Bi-function LED head lamp using a thin shield (40). The lamp includes: a low beam light source (20) and a high beam light source (30) installed at inner upper and lower sides of a reflector (10); a shield (40) installed at a front end of the partition (13) in the reflector (10); a lens holder (60) in which the rear is joined to a front surface of the reflector (10); and a signal reflection surface (61) installed at an inner lower end of the lens holder (60). The low beam and the high beam are implemented only by turning on and off the LEDs (20, 30) through applying the thin shield (40) without an actuator.