LED Matrix Headlamp Stabilization via Microprocessor Control
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Solution Overview
Problem
Conventional headlamps and flashlights experience unsteady light cones and flickering illumination due to vibrations and movements, which are disadvantageous for cyclists as they fail to provide stable and uniform path illumination.
Innovation Solution
A headlamp or flashlight with a matrix of LEDs or LED groups positioned differently relative to the front lens, controlled by a microprocessor that adjusts which LEDs light up based on input data from a gyro sensor, ensuring a stable light cone despite movements and vibrations, and includes a calibration device for initial alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional single light source is used in headlamps or flashlights, then the device structure is simple, but the light cone becomes unsteady and flickers during movements and vibrations
Solution Approach 1:
The single light source is segmented into multiple LEDs arranged in a matrix pattern. Each LED can be independently controlled to generate light cones at different angles relative to the optical axis. This segmentation allows the system to compensate for vibrations and movements by selectively activating different LEDs, thereby maintaining a stable light cone orientation.
Solution Approach 2:
The system dynamically selects which LEDs to activate based on real-time motion data from the gyro sensor. The microprocessor continuously adjusts the active LED configuration in response to detected movements and vibrations, making the light source adaptive and dynamic rather than static. This dynamic adjustment ensures the light cone remains stable despite external disturbances.
2Reliability
If multiple LEDs are added to compensate for movements, then the light cone stability improves, but the device complexity and control requirements increase
Solution Approach 1:
A gyro sensor provides real-time feedback about the lamp's orientation and movements. The microprocessor receives this feedback data and uses it to determine which LEDs should be activated to compensate for the detected motion. This closed-loop feedback system automatically adjusts the light cone orientation without requiring manual intervention, managing the increased complexity through intelligent control.
Solution Approach 2:
The patent replaces mechanical adjustment mechanisms (such as movable mirrors or rotating reflectors) with an electronic control system. Instead of physically moving components to maintain light cone stability, the system uses electronic switching between multiple fixed LEDs, each positioned to emit light at different angles. This substitution reduces mechanical complexity while achieving the same stabilization effect.
3Adaptability or versatility
If LEDs are positioned at different distances from the optical axis, then the ability to compensate for various movements improves, but the manufacturing precision requirements increase
Solution Approach 1:
The LEDs are arranged in an asymmetric matrix pattern relative to the optical axis, with different numbers of LEDs positioned at different distances and angles. This asymmetric configuration provides broader coverage for compensating various types of movements and vibrations. The asymmetric design accepts greater manufacturing tolerances compared to a perfectly symmetric arrangement, as it is optimized for functional performance rather than geometric precision.
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 achieves a stable and uniform light cone alignment with respect to a horizontal position, compensating for pitching and pivoting movements, and allows for broad illumination of the path ahead, ensuring consistent lighting regardless of the lamp's orientation.
Implementation Method 1
a gyro sensor is provided which registers movements of the lamp and generates a data record which corresponds to the input data of the microprocessor
Implementation Method 2
the light source consists of a matrix with several light-emitting diodes (LEDs) or with several groups of LEDs
Implementation Method 3
different LEDs or the different LED groups light cones with different beam angles
Implementation Method 4
the light source consists of a matrix with several light-emitting diodes (LEDs) or with several groups of LEDs, which are positioned differently in relation to the front lens
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The present invention relates to a head lamp or flashlight (1) comprising a light source (2) and an auxiliary optical unit (3). In order to propose a head lamp or flashlight (1), the emitted light cone (10, 10') of which generates a stable light cone (10, 10') even in the case of movements and/or vibrations and which allows a uniform and flicker-free illumination of the path (9, 9') ahead, it is proposed that the light source consists of a matrix (2) having a plurality of light emitting diodes (LEDs) or having a plurality of groups of LEDs which are positioned differently relative to the auxiliary lens (3), such that the different LEDs or the different groups of LEDs generate light cones (10, 10') with different emission angles with respect to the optical axis (7) of the lamp, wherein the matrix (2) is connected to a microprocessor (4) which, depending on input data, regulates which LED or which group of LEDs of the matrix (2) is luminous, as a result of which a stable light cone (10, 10') is emitted independently of a movement of the lamp (1).