Optical Path Control Member for Switchable Privacy and Light Transmission
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Solution Overview
Problem
Existing optical path control members do not effectively balance light-blocking and light-transmitting characteristics for privacy and public modes, respectively.
Innovation Solution
An optical path control member with a design featuring alternating partition wall parts and accommodation parts of specific widths, containing light conversion particles dispersed in a liquid, allows for controlled light transmission by adjusting the positions of the particles using electrodes with different polarities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the partition wall part is made narrow to improve light-blocking characteristic in privacy mode, then the light transmission in public mode is reduced
Solution Approach 1:
The optical path control member uses voltage-controlled light conversion particles that can dynamically change their state between transmitting and blocking light. By applying different voltages to the first and second electrodes, the same partition wall structure can provide high light-blocking in privacy mode while maintaining light transmission in public mode, making the system adaptive rather than static
Solution Approach 2:
The invention changes the optical parameters of the partition wall part by controlling the light conversion material's state through voltage. The light conversion particles change their optical properties (from transparent to opaque) based on applied voltage, allowing the same physical structure to exhibit different light transmission characteristics under different operating conditions
2Illumination intensity
If the accommodation part is made large to increase light transmission in public mode, then the light-blocking characteristic in privacy mode is reduced
Solution Approach 1:
The system dynamically adjusts the optical state of the light conversion material filled in the accommodation part. When voltage is applied, the light conversion particles change state to block light, allowing the large accommodation area to provide both high transmission (when particles are dispersed) and high blocking (when particles aggregate), resolving the contradiction between size and functional performance
Solution Approach 2:
The optical parameters of the light conversion material in the accommodation part are changed through voltage control. The light conversion particles transition between dispersed (transmissive) and aggregated (blocking) states, enabling the same physical structure to provide opposite optical functions based on electrical control rather than requiring different physical dimensions
3Illumination intensity
If light conversion particles are dispersed to increase light transmission, then the light-blocking characteristic is reduced
Solution Approach 1:
The invention creates a dynamically controllable system where light conversion particles can switch between dispersed and aggregated states through voltage application. This dynamic control allows the same particle arrangement to provide either high transmission or high blocking characteristics as needed, eliminating the need for separate structures for each function
Solution Approach 2:
The spatial distribution parameter of light conversion particles is changed through voltage control. By applying voltage, particles transition from a dispersed state (providing transmission) to an aggregated state (providing blocking), effectively changing the optical parameters of the material without physical restructuring
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 design enhances light-blocking in privacy mode by reducing transmission through narrow partition walls and increases light transmission in public mode by enlarging partition wall widths, improving functionality in various environments.
Implementation Method 1
The light conversion particles are dispersed or aggregated by an application of voltage
Data Source
AI summary
An optical path control member according to an embodiment includes a first substrate; a first electrode disposed on the first substrate; a second substrate disposed on the first substrate; a second electrode disposed under the second substrate; and a light conversion part disposed between the first electrode and the second electrode, wherein the light conversion part includes an accommodation part and a partition wall part which are disposed alternately, wherein a light conversion material is disposed inside the accommodation part, and the light conversion material includes a dispersion liquid and light conversion particles dispersed in the dispersion liquid, wherein the partition wall part has a first width defined as a long width of the partition wall part and a second width defined as a short width of the partition wall part, wherein the accommodation part has a third width defined as a long width of the accommodation part and a fourth width defined as a short width of the accommodation part, and wherein the third width is greater than the second width.