Refractive Index-Adjustable Layer for Display Brightness Control
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Solution Overview
Problem
Current clear ink display technologies face complexities in manufacturing, susceptibility to black ink particle aggregation, and long response times due to the use of black ink particles for controlling light reflection and absorption.
Innovation Solution
A display assembly comprising a convex lens, a refractive index-adjustable layer, and a light-absorbing layer, where the refractive index of the adjustable layer is adjusted to control light reflection and absorption, eliminating the need for black ink particles by using an electro-optic or piezoelectric material layer with electrodes to change refractive index in response to electrical fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If black ink particles are used to control light reflection and absorption, then the display can achieve bright and dark states, but the manufacturing process becomes complex and response time increases
Solution Approach 1:
The invention extracts and removes the black ink particles from the display system, replacing them with a refractive index-adjustable layer that controls light through refractive index changes rather than particle-based absorption. This eliminates the manufacturing complexities associated with handling and positioning black ink particles while maintaining the bright/dark state control functionality.
Solution Approach 2:
The invention replaces the mechanical particle-based light control system with an optical field-based system. Instead of physically moving black ink particles to control light, the patent uses an electro-optic or piezoelectric material layer whose refractive index is adjusted by electrical fields, thereby substituting mechanical particle manipulation with an electrical-optical control mechanism that simplifies manufacturing and accelerates response time.
2Reliability
If black ink particles are used for light control, then brightness states can be achieved, but response time becomes slow due to particle movement
Solution Approach 1:
The invention replaces the slow mechanical movement of black ink particles with an instantaneous electrical field-induced refractive index change in the electro-optic or piezoelectric material layer. This substitution eliminates the time required for particle movement and repositioning, achieving rapid switching between bright and dark states while maintaining reliable brightness control.
Solution Approach 2:
The invention introduces dynamic control through the refractive index-adjustable layer that can rapidly change its optical properties in response to electrical signals. This dynamic adjustment mechanism allows for fast response times compared to the static particle-based system, enabling quick transitions between display states without compromising brightness control reliability.
3Reliability
If black ink particles are used to control light, then display states can be achieved, but uneven coloring occurs due to particle aggregation
Solution Approach 1:
The invention extracts and removes the black ink particles that cause aggregation and uneven coloring, replacing them with a homogeneous refractive index-adjustable layer. This layer provides uniform optical properties across the display surface, eliminating the coloring inconsistencies caused by particle aggregation while preserving the light control functionality through refractive index modulation.
Solution Approach 2:
The invention employs a homogeneous refractive index-adjustable layer made of electro-optic or piezoelectric material that provides uniform optical properties throughout the display area. This homogeneous structure eliminates the aggregation issues inherent in particle-based systems, ensuring consistent and uniform light control and coloring across the entire display surface.
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
Simplifies the manufacturing process, avoids issues like uneven coloring and long response times, and effectively controls brightness and darkness by adjusting the refractive index of the electro-optic material layer, enabling faster switching between bright and dark states.
Implementation Method 1
the refractive index-adjustable layer can comprise an electro-optic material layer... the electrical field is configured to cause a change of the refractive index of the electro-optic material layer
Implementation Method 2
when a light transmits from an optically denser medium into an optically thinner medium, total reflection occurs if an incident angle of the light is greater than a total reflection angle
Implementation Method 3
the light transmits through the refractive index-adjustable layer and reaches the light-absorbing layer for absorption to thereby realize a dark state
Data Source
AI summary
A display assembly includes a convex lens, a light-absorbing layer, and a refractive index-adjustable layer disposed therebetween. The refractive index-adjustable layer has a refractive index adjustable between less than, and no less than, a critical value, configured such that a light incident into the convex lens has a total reflection if the refractive index of the refractive index-adjustable layer is less than the critical value, and transmits through the refractive index-adjustable layer and reaches the light-absorbing layer for absorption if the refractive index of the refractive index-adjustable layer is no less than the critical value. The critical value can be a refractive index of the convex lens if it is in direct contact with the refractive index-adjustable layer, or can be a refractive index of a transparent film layer disposed between the convex lens and the refractive index-adjustable layer and in direct contact with the refractive index-adjustable layer.