Variable Light Transmission Unit Conceals Wavelength Conversion Unit
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Solution Overview
Problem
The visibility of the wavelength conversion unit in light source modules used in mobile devices for flash photography interferes with the uniform design of these devices, as it is easily identifiable through the light transmission unit due to its unique color, affecting the aesthetic and functional integration with camera modules.
Innovation Solution
A light source module design featuring a variable light transmission unit with charged colored particles that change transmissivity based on applied voltage, allowing the wavelength conversion unit to be concealed when not in use, and integrated with a flash LED device and processor-controlled voltage application for seamless operation with camera modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a wavelength conversion unit is disposed in the light emitting device, then the light source module can provide flash light for capturing images, but the wavelength conversion unit is easily identified externally through the light transmission unit due to its unique color, which impedes uniformity in the design of the mobile device
Solution Approach 1:
The patent applies a variable light transmission unit that can dynamically change its light transmission properties between transparent and opaque states based on voltage application. This dynamic characteristic allows the unit to adapt between providing flash light functionality and maintaining design uniformity, resolving the contradiction between functional requirement and aesthetic requirement
Solution Approach 2:
The patent utilizes a dispersion including charged colored particles that can change optical properties when voltage is applied. The colored particles can alter the light transmission characteristics and color appearance of the variable light transmission unit, enabling it to conceal the wavelength conversion unit's unique color and maintain design uniformity when flash function is not needed
2Reliability
If the wavelength conversion unit is visible through the light transmission unit, then the flash LED device can be identified, but this visibility acts as a factor impeding uniformity in the design of the mobile device
Solution Approach 1:
The variable light transmission unit provides dynamic control over visibility, allowing the system to switch between states where the flash LED device is identifiable (for functional reliability) and states where it is concealed (for aesthetic integration). This resolves the contradiction by making visibility controllable rather than fixed
Solution Approach 2:
The dispersion with charged colored particles enables color and transparency changes in the variable light transmission unit. When voltage is applied, the colored particles can mask the unique color of the wavelength conversion unit, allowing the module to maintain aesthetic integration with the camera module while preserving the ability to identify flash functionality when needed
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 ensures that the wavelength conversion unit is not visible when not in use, maintaining design uniformity and enhancing the integration of light source modules with camera functions in mobile devices, while allowing for adjustable light transmission for optimal flash functionality.
Implementation Method 1
a dispersion provided in a separation space between the first transparent substrate and the second transparent substrate and including charged colored particles, wherein transmissivity of light passing through the dispersion including the charged colored particles varies based on a driving voltage applied to the electrode portion
Data Source
AI summary
Provided is a light source module including a package body having a groove portion, a semiconductor light emitting diode (LED) chip provided on a bottom surface of the groove portion, the semiconductor LED chip being configured to emit light based on a first driving voltage applied thereto, a variable light transmission unit provided on the groove portion and having light transmissivity varying based on a second driving voltage applied thereto, a first electrode side surface and a second electrode side surface provided on side surfaces of the groove portion and connecting the bottom surface of the groove portion to the variable light transmission unit, and a processor configured to control application of the first driving voltage to the semiconductor LED chip and the second driving voltage to the variable light transmission unit.