Microarray LED Flash for Adjustable Color and Projection
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Solution Overview
Problem
Conventional smartphone flash systems lack adjustable color and light pattern capabilities, requiring post-processing adjustments and are inadequate for projection due to heat dissipation and power constraints, limiting their functionality for various shooting environments and image presentation.
Innovation Solution
A microarray LED flash system incorporating a μLED array module with red, green, and blue LEDs, and a detachable mixing optical module for generating a multi-array mixed light source with adjustable color and pattern, capable of projecting images, while maintaining a slim form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional LED light source is used for smartphone flash, then the device structure is simple, but the color temperature adjustment capability is insufficient
Solution Approach 1:
The flash light source is segmented into multiple independent LED chips with different color temperatures (warm white LED and cold white LED). Each LED chip can be independently controlled to emit light, enabling flexible color temperature adjustment by mixing different proportions of warm and cold white light, thereby resolving the contradiction between structural simplicity and color temperature adaptability.
2Adaptability or versatility
If conventional projector module is used for mobile phone projection, then the projection function can be achieved, but the heat dissipation problem occurs due to small size
Solution Approach 1:
The projection function is merged with the existing flash light source system. The same μLED array module that provides lighting for photography is also used as the light source for projection. By combining these two functions into one system, the patent avoids adding a separate high-power projection module that would generate excessive heat, thereby resolving the heat dissipation problem while maintaining projection capability.
3Adaptability or versatility
If conventional projector module is used for mobile phone, then the projection function is achieved, but the power consumption is too large
Solution Approach 1:
The flash light source system is designed to serve multiple functions: it provides lighting for photography, enables color temperature adjustment, generates special lighting effects, and serves as the light source for projection. By making the system universal and multi-functional, the patent eliminates the need for a separate high-power projection module, thereby reducing overall power consumption while maintaining all required functions.
4Length of moving object
If μLED array module with thin thickness is used, then the smartphone thickness is reduced, but the lighting capability must be maintained
Solution Approach 1:
The patent employs a thin-film design for the μLED array module, where multiple LED chips are arranged in a compact, planar configuration within a thin substrate. This thin-film structure reduces the module thickness to be less than the average smartphone thickness while maintaining adequate lighting capability through optimized LED chip density and optical design, thereby resolving the contradiction between thinness and lighting performance.
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 adjustable color and light pattern control for improved photography and direct image projection without the need for post-processing, reducing thickness and volume, and enhancing the smartphone's functionality with a compact and efficient lighting solution.
Implementation Method 1
The μLED array module comprises a μLED array chip of a plurality of μLED elements, and the μLED array module is for generating the patterning light source via the μLED elements
Implementation Method 2
The μLED array module further comprises a microarray lens corresponding to each μLED element, and the μLED elements are for generating the patterning light source via the microarray lens
Implementation Method 3
The mixing optical module is detachably configured on an external surface of the shell to receive the patterning light source for lighting the multi-array mixed light source
Data Source
AI summary
A microarray LED flash, applied to a mobile phone for lighting an adjustable flashlight or projecting an image, comprises a μLED array module, a mixing optical module and an optical module. The μLED array module is configured in a shell of the mobile phone for generating a patterning light source. The mixing optical module and the optical module are detachably configured on an external surface of the shell to receive the patterning light source from the μLED array module for lighting the flashlight or projecting the image respectively. A μLED array chip could be used as the μLED array module and combined with the outboard mixing optical module to generate a flashlight with adjustable color and light pattern. Furthermore, the invention can use the optical module to substitute for the mixing optical module for projecting an image from the patterning light source, therefore the mobile phone has a projection function.