Variable-Focus Flashlight Module for Adjustable Illumination
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Solution Overview
Problem
Existing flashlights in portable electronic devices lack the ability to optimize light-emitting effects according to varying usage environments, failing to provide adjustable illumination areas and ranges.
Innovation Solution
A variable focus flashlight module comprising a first lens with negative refracting power, a second lens with positive refracting power, and a third lens with positive refracting power, along with an array of independently controllable light emitting elements, allows for adjustable illumination areas and ranges through a fixed total length and adjustable focal length ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single light source and simple lens are used, then the device structure is simple, but the illumination range and focus are fixed and cannot be adjusted
Solution Approach 1:
The flashlight module divides the illumination function into multiple independent light emitting elements arranged in an array, where each element can be controlled separately. This segmentation allows different regions to provide different illumination intensities and enables flexible adjustment of the effective illumination area, resolving the contradiction between adaptability and device complexity.
Solution Approach 2:
The patent implements dynamic control of the illumination system by independently adjusting the intensity of each light emitting element through a controller. This dynamic adjustment capability allows the effective illumination area to be flexibly changed, providing adaptability to different usage scenarios while maintaining a relatively simple overall structure.
2Adaptability or versatility
If multiple light emitting elements with independent control are used, then adjustable illumination intensity and arrayed illumination are achieved, but the device complexity increases
Solution Approach 1:
The controller serves multiple functions: it individually controls the intensity of each light emitting element, adjusts the effective illumination area, and manages the overall lighting effects. This multi-functionality reduces the need for separate control mechanisms for each function, thereby limiting the increase in device complexity while achieving adjustable lighting effects.
Solution Approach 2:
The patent combines multiple light emitting elements into a single integrated array structure, and merges their control functions into a unified control system. This merging approach allows the system to achieve complex illumination patterns through coordinated control of multiple elements, rather than requiring separate devices for each function.
3Length of moving object
If the flashlight module length is kept constant, then the device size is compact, but the focal length ratio of lenses must be precisely controlled
Solution Approach 1:
The patent optimizes the focal length ratio of the second and third lenses to fall within a specific range (1.78 to 3.02), rather than requiring a single precise value. This parameter range approach provides manufacturing tolerance, allowing the module length to remain constant while reducing the stringency of manufacturing precision requirements.
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 module achieves adjustable illumination areas and ranges with adjustable intensity and color temperature, enhancing lighting flexibility and quality.
Implementation Method 1
The first lens has a negative refracting power
Implementation Method 2
The second lens has a positive refracting power
Implementation Method 3
The third lens has a positive refracting power
Data Source
AI summary
A variable focus flashlight module including a first lens, a second lens, a third lens, and a light source module sequentially from a magnified side to a minified side along an optical axis of the variable focus flashlight module is provided. The first lens has a negative refracting power. The second lens has a positive refracting power. The third lens has a positive refracting power. The light source module includes multiple light emitting elements arranged in an array. A total length of the variable focus flashlight module is a constant value, and a ratio of a focal length of the second lens to a focal length of the third lens falls within a range of 1.78 to 3.02.