Optical Path Control Member for Particle Sedimentation and Privacy Response
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Solution Overview
Problem
Existing optical path control members face issues with reduced light-shielding characteristics and driving speed due to sedimentation of light conversion particles over time, especially in privacy modes.
Innovation Solution
The optical path control member is designed with light conversion particles having a controlled sedimentation velocity of 0.001 mm/day to 0.7 mm/day, and these particles are distributed in regions with varying sedimentation velocities to maintain light-shielding characteristics and improve driving speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If light conversion particles are used in the optical converter, then the optical path control member can switch between light transmitting and light blocking portions, but the light conversion particles settle in the direction of gravity causing reduced light-shielding characteristics over time
Solution Approach 1:
The receiving portion is divided into a first region and a second region with different functions. The first region contains light conversion particles with small sedimentation velocity to maintain light-shielding characteristics, while the second region contains particles with large movement velocity for fast response. This local differentiation resolves the contradiction between adaptability and reliability.
2Speed
If light conversion particles are allowed to move freely for fast response, then driving speed improves, but sedimentation occurs reducing light-shielding characteristics
Solution Approach 1:
Different regions within the receiving portion are assigned different particle characteristics: the first region uses particles with small sedimentation velocity (0.001-0.1 mm/day) to maintain stability and light-shielding, while the second region uses particles with large movement velocity for fast response. This spatial differentiation allows both fast response and maintained light-shielding characteristics.
3Duration of action of stationary object
If the optical path control member operates in privacy mode for extended periods, then privacy protection is maintained, but light conversion particles settle causing degradation of light-shielding characteristics
Solution Approach 1:
The patent controls the sedimentation velocity parameter of light conversion particles to be within a specific range (0.001-0.7 mm/day). By adjusting this physical parameter, the particles maintain their functional distribution even during extended operation in privacy mode, preventing degradation of light-shielding characteristics while maintaining long-term operation capability.
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 long-term operation with improved light-shielding and driving speed by minimizing particle sedimentation and optimizing particle movement in different regions, maintaining effective light control.
Implementation Method 1
The optical converter can operate as a light transmitting portion or a light blocking portion by dispersion and aggregation of the light conversion particles
Implementation Method 2
a sedimentation velocity of the light conversion particles is 0.001 mm/day to 0.7 mm/day, and the sedimentation velocity of the light conversion particles is a velocity of the light conversion particles moving in a longitudinal direction of the receiving portion
Data Source
AI summary
An optical path control member according to an embodiment comprises: a first substrate; a first electrode disposed on the first substrate; a second substrate disposed above the first substrate; a second electrode disposed under the second substrate; and a light conversion portion disposed between the first electrode and the second electrode, wherein the light conversion portion comprises receiving portions and partition walls which are alternately arranged, the receiving portions include disposed therein a light conversion material including a dispersion and light conversion particles dispersed in the dispersion, the light conversion particles have a sedimentation speed of 0.001-0.7 mm/day, and the sedimentation speed of the light conversion particles is the speed of the light conversion particles moving in the length direction of the receiving portions.