LCD Sunglass Lens Transmittance Control via Illuminance Feedback
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Solution Overview
Problem
Existing sunglasses and goggles lack the ability to easily adjust optical characteristics such as transmittance and color in response to varying environmental conditions like temperature and illuminance, and they consume excessive power due to lack of efficient control mechanisms.
Innovation Solution
An optical characteristics adjusting system for sunglasses and goggles, incorporating LCD panels, drive units, illuminance and temperature sensors, and a control unit that allows for automatic and manual adjustment of transmittance and color, minimizing power consumption by using a shutter LCD and diffusion color filters, and a wearing detecting sensor to optimize lens operation based on ambient conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a discoloration lens is used to adjust optical characteristics, then the lens can react to ultraviolet light, but it cannot be easily used at night or in vehicles with UV shielding glass and is largely affected by temperature
Solution Approach 1:
The patent uses LCD panels to change the optical transmittance parameter of the lens, allowing it to adjust from transparent to dark states. This parameter change enables the lens to adapt to various lighting conditions including night and vehicle environments, overcoming the limitations of discoloration lenses that rely on UV light reactions.
2Ease of operation
If liquid crystal is used for simple transmissivity adjustment, then transmittivity can be varied, but the technique cannot deal with surrounding illuminance
Solution Approach 1:
The patent incorporates an illuminance sensor that detects surrounding light levels and provides feedback to the control unit. The control unit then adjusts the LCD panel drive voltage accordingly, creating a closed-loop feedback system that enables the lens to automatically adapt to changing illuminance conditions while maintaining ease of operation.
3Productivity
If LCD panels are used to adjust optical characteristics, then rapid and optimal adjustment according to environmental changes is enabled, but power consumption increases
Solution Approach 1:
The patent employs periodic scanning of the LCD panel rather than continuous operation. The control unit updates the LCD panel at specific intervals based on environmental conditions, allowing rapid adjustment when needed while minimizing power consumption during stable conditions. This periodic action approach balances speed and energy efficiency.
4Speed
If the LCD panel drive voltage frequency is increased to improve response speed, then adjustment speed increases, but power consumption increases
Solution Approach 1:
The patent uses periodic scanning of the LCD panel at optimized intervals rather than continuous high-frequency driving. The control unit adjusts the scanning frequency based on environmental changes, maintaining adequate response speed while significantly reducing power consumption compared to continuous high-frequency operation.
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 rapid and optimal adjustment of optical transmittance and color according to environmental changes, reducing power consumption by stopping lens operation when not in use, thus providing improved functionality and energy efficiency.
Implementation Method 1
a lens having an LCD panel; a lens drive unit having an LCD drive unit for applying a drive voltage to the LCD panel
Implementation Method 2
an illuminance detecting sensor for detecting an ambient illuminance
Implementation Method 3
a diffusion color filter for receiving light from the light source drive unit
Data Source
AI summary
The present invention relates to sunglasses and goggles, and more particularly relates to a system for adjusting optical characteristics such as the color or the optical transmittance of sunglasses or goggles lens and relates to sunglasses and goggles equipped with the adjusting system. Provided is an optical characteristics adjusting system for sunglasses or goggles lenses, the system comprising: lenses equipped with an LCD panel; a lens drive unit equipped with an LCD drive unit for applying a driving voltage to the LCD panel; an illuminance detecting sensor for sensing the ambient illuminance; and a control unit for controlling the action of the lens drive unit in response to a signal from the illuminance detecting sensor. Also provided are sunglasses and goggles equipped with the optical characteristics adjusting system.