Light Controlling Panel with Dielectric Layer for Transparent Display
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Solution Overview
Problem
Existing transparent display devices face challenges in maintaining a high contrast ratio in various lighting environments due to their transmissive areas, and there is a need for improved light management to reduce greenhouse gas emissions during manufacturing.
Innovation Solution
A light controlling panel with a dielectric layer comprising a first dielectric material and a second dielectric material with light blocking particles, which can switch between a light-blocking mode and a light-transmitting mode by controlling the movement of light blocking particles using an electric field. This panel is integrated into a transparent display device to enhance light transmittance and reduce environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmissive area is provided in the display device to allow users to see objects on the rear surface, then transparency and visibility are improved, but the contrast ratio deteriorates in dark or illuminated environments
Solution Approach 1:
The patent applies a dynamic light controlling panel that can switch between light-blocking and light-transmitting modes. The dielectric layer contains light-blocking particles that can be moved by applying voltage, allowing the display to dynamically adjust its transparency and contrast ratio based on environmental lighting conditions. This resolves the contradiction by making the transmissive area adaptable rather than static.
Solution Approach 2:
The patent changes the physical state and position of light-blocking particles within the dielectric layer by applying voltage. By controlling the movement of these particles between different positions, the optical properties of the display (transparency and contrast ratio) are adjusted. This parameter change allows the display to maintain high contrast ratio when needed while preserving transparency when required.
2Manufacturing precision
If conventional display structures are used to maintain contrast ratio, then display quality is improved, but greenhouse gas emissions increase due to complex manufacturing processes
Solution Approach 1:
The patent uses a composite dielectric layer containing both a first dielectric material and light-blocking particles suspended in a second dielectric material. This composite structure enables the light-blocking functionality without requiring separate complex layers, simplifying the manufacturing process while maintaining high contrast ratio performance and reducing environmental impact.
Solution Approach 2:
The dielectric layer serves multiple functions simultaneously: it provides electrical insulation, contains and moves light-blocking particles for contrast control, and maintains structural integrity. This multi-functionality eliminates the need for separate components, simplifying manufacturing and reducing greenhouse gas emissions while achieving the desired contrast ratio.
3Manufacturing precision
If light-blocking particles are densely distributed to improve light-blocking mode performance, then contrast ratio is improved, but light transmittance in light-transmitting mode deteriorates
Solution Approach 1:
The light-blocking particles are not fixed but can be dynamically repositioned by applying voltage to the first and second electrodes. In light-blocking mode, particles are concentrated in specific regions to maximize contrast ratio. In light-transmitting mode, particles are dispersed or moved away from the light path, allowing high light transmittance. This dynamic control resolves the contradiction between the two opposing requirements.
Solution Approach 2:
The dielectric layer is segmented into different regions with different dielectric materials (first dielectric material and second dielectric material with light-blocking particles). This segmentation allows light-blocking particles to be concentrated in specific segments when needed for high contrast ratio, while other segments remain clear for high light transmittance, resolving the contradiction between these two requirements.
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 achieves improved light transmittance in the light-transmitting mode and maintains a high contrast ratio in the light-blocking mode, while also reducing the environmental footprint by minimizing greenhouse gas emissions during the manufacturing process.
Implementation Method 1
a second dielectric including a plurality of light blocking particles
Implementation Method 2
capable of switching between a light-blocking mode and a light-transmitting mode by controlling the movement of light blocking particles using an electric field
Implementation Method 3
Through the transmissive area, a high light transmittance can be achieved in the display area
Data Source
AI summary
A light controlling panel can include: a first electrode and a second electrode disposed to face each other; and a dielectric layer disposed between the first electrode and the second electrode. The dielectric layer can include: a first dielectric including a first dielectric material and a groove, the first dielectric material having a first dielectric permittivity; and a second dielectric including a plurality of light blocking particles and a solvent including a second dielectric material having a second dielectric permittivity less than the first dielectric permittivity.