Light Control Panel with Charged-Particle Ink for External-Light Blocking
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Solution Overview
Problem
Existing display devices face challenges in achieving high image quality and efficient light control, particularly in blocking external light to enhance contrast ratios and reduce power consumption.
Innovation Solution
A light control panel with a dielectric layer having dielectric patterns and spacers, an ink layer with charged particles, and a light-blocking pattern on spacers, allowing for a light-blocking mode and transmissive mode, enhancing the shield factor and image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-blocking mode is implemented to improve contrast ratio, then image quality is improved, but the shield factor is insufficient and external light penetration occurs
Solution Approach 1:
The light control panel is divided into multiple functional layers: a dielectric layer with dielectric patterns and spacers, an ink layer with charged particles, and a light-blocking pattern layer. Each layer segments the light control function to achieve both high contrast ratio and effective shielding against external light penetration.
Solution Approach 2:
The patent employs composite material structures combining dielectric materials with charged particles in an ink layer, and integrates these with a light-blocking pattern layer. This composite approach enables simultaneous achievement of light blocking for high contrast ratio and sufficient shield factor to prevent external light penetration.
2Manufacturing precision
If a light-blocking pattern is added on spacers to increase shield factor, then image quality is improved, but device complexity increases
Solution Approach 1:
The light-blocking pattern is integrated with the existing spacer structures in the dielectric layer, merging the shielding function with the already-present structural elements. This reduces the need for separate complex components while achieving the desired shield factor improvement.
Solution Approach 2:
The light-blocking pattern is selectively applied only on the spacers where it is most needed for shielding, rather than uniformly across the entire panel. This localized approach increases the shield factor at critical positions while minimizing the overall device complexity and material usage.
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 enables high contrast ratios in the light-blocking mode while allowing clear recognition of objects behind the display in the transmissive mode, reducing manufacturing costs and environmental impact through optimized processes.
Implementation Method 1
an ink layer disposed in a space between the dielectric layer and the second electrode and including charged particles
Data Source
AI summary
The present specification relates to a light control panel and a transparent display device including the same. A light control panel according to the present disclosure includes a first electrode, a second electrode disposed on the first electrode while facing the first electrode, a dielectric layer provided between the first electrode and the second electrode and including a plurality of dielectric patterns disposed between a plurality of grooves, and a plurality of spacers spaced apart from the plurality of dielectric patterns and further protruding toward the second electrode than the plurality of dielectric patterns, an ink layer disposed in a space between the dielectric layer and the second electrode and including charged particles, a light-blocking pattern disposed on the plurality of spacers, and a bonding layer disposed between the ink layer and the second electrode, in which the light-blocking pattern is disposed to be in contact with the bonding layer.