Encapsulated Pixels With Inductive Power For Display Reliability
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Solution Overview
Problem
Visual display units, particularly those using liquid crystals, deteriorate due to environmental exposure and electrolysis caused by excitation voltage, with existing protection methods being inefficient and costly.
Innovation Solution
The development of encapsulated pixels with a hermetically sealed optical element and inductive power coupling, using transparent conductive materials and insulating coatings to prevent environmental degradation and electrolysis, allowing for bistable optical states and power transmission without conductive pathways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connecting wires are used to provide excitation voltage to optical elements, then the display device can be operated, but air seepage occurs through the protective layer hastening deterioration of optical elements
Solution Approach 1:
The patent removes the harmful conductive pathways (connecting wires) that penetrate the protective layer, extracting the source of air seepage. Power is transmitted inductively through electromagnetic coupling between coils on opposite sides of the protective layer, eliminating the need for physical wire connections that compromise the seal.
Solution Approach 2:
The patent introduces an intermediary electromagnetic field as the medium for power transmission. Instead of direct conductive contact, electrical energy is transferred through inductive coupling between transmitter and receiver coils separated by the protective layer, allowing power delivery without compromising the hermetic seal.
2Ease of operation
If excitation voltage is applied to optical elements, then the display can be activated, but electrolysis degrades the optical elements over time
Solution Approach 1:
The patent replaces the conventional direct electrical connection system with an inductive power transmission system. Electrical energy is transferred wirelessly through electromagnetic induction, eliminating direct current flow through the optical elements and preventing electrolysis while maintaining display functionality.
Solution Approach 2:
The electromagnetic field serves as an intermediary medium for energy transfer. The transmitter coil generates an oscillating magnetic field that induces current in the receiver coil, providing excitation voltage to the optical elements without direct conductive contact that would cause electrolytic degradation.
3Use of energy by moving object
If connecting wires cross the protective layer, then power can be delivered to optical elements, but leaky channels are created for air seepage
Solution Approach 1:
The patent extracts and removes the connecting wires that create leaky channels in the protective layer. Power delivery is achieved through inductive coupling between coils positioned on opposite sides of the protective layer, eliminating the need for wires to penetrate the seal.
Solution Approach 2:
The patent transitions from a one-dimensional conductive connection (wires crossing the layer) to a three-dimensional electromagnetic field interaction. Power is transmitted through the volume of the protective layer via electromagnetic induction, avoiding the need for linear wire paths that compromise the seal.
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 encapsulated pixels effectively protect optical elements from environmental influences and electrolysis, maintaining stable optical states and enabling power transmission without conductive connections, thus extending the lifespan of display devices and reducing operational costs.
Implementation Method 1
The encapsulated pixel is hermetically sealed from the environment by a sealing layer
Implementation Method 2
inductive power coupling, using transparent conductive materials and insulating coatings to prevent environmental degradation and electrolysis, allowing for bistable optical states and power transmission without conductive pathways
Implementation Method 3
The optical states of these elements change in response to an electrical potential (voltage) applied thereacross
Data Source
AI summary
A display device comprising an array of encapsulated pixels. The encapsulating pixel includes an optical element which is altered from a first optical state to a second optical state upon when a potential difference is generated across it. The optical element is in contact with two electrodes which are connected to a pixel driver for generating the potential difference. The encapsulated pixel is hermetically sealed from the environment by a sealing layer and the driver receives power wirelessly via an inductive power transmission system.