Graphene Display Metal Shield Layer Color Stability
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Solution Overview
Problem
Graphene displays face challenges in achieving stable color and color reproduction due to variations in the electric field generated by gate electrodes, affecting the wavelength of emitted light.
Innovation Solution
A graphene display configuration featuring stacked and overlapping first and second graphene light-emitting units with a metal shield layer between them, along with insulation layers and transparent substrates, ensures stable color reproduction by isolating the gate electrode patterns and preventing color changes from the electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If gate electrode patterns are used to adjust the wavelength of emitted light, then the color of emitted light can be tuned, but the color stability deteriorates due to electric field variations
Solution Approach 1:
A metal shield layer is introduced as an intermediary component between the first and second gate electrode patterns. This shield layer blocks the electric field from the first gate electrode from affecting the second graphene light-emitting unit, thereby maintaining color stability while preserving the ability to tune light wavelength through gate voltage control
2Device complexity
If a single graphene light-emitting unit is used, then the structure is simple, but the color reproduction stability deteriorates due to gate electrode electric field interference
Solution Approach 1:
The display is divided into two separate graphene light-emitting units with distinct gate electrode patterns. The first unit handles light emission while the second unit's emission is protected from electric field interference by the metal shield layer, achieving stable color reproduction through structural segmentation
Solution Approach 2:
The metal shield layer serves as a protective intermediary that isolates the second graphene light-emitting unit from the electric field of the first gate electrode, ensuring that color reproduction remains stable while maintaining a relatively simple overall structure
3Ease of operation
If gate electrode electric field is used to control light emission, then light wavelength can be adjusted, but harmful electric field interference affects color consistency
Solution Approach 1:
The metal shield layer acts as a protective intermediary that blocks harmful electric field interference from the first gate electrode from reaching the second graphene light-emitting unit, while allowing the controlled adjustment of light wavelength to proceed without interference
Solution Approach 2:
The metal shield layer, which could be seen as adding structural complexity, actually converts the potential harm of electric field interference into a benefit by providing a clear solution that maintains both operational control and color consistency
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
This configuration maintains consistent color emission on both sides of the display, enhancing color stability and reproduction by isolating the gate electrode patterns with a metal shield layer, allowing for precise control of light emission and grayscale adjustment.
Implementation Method 1
a metal shield layer disposed between the first graphene light-emitting unit and the second graphene light-emitting unit... the metal shield layer is located between the first gate electrode pattern and the second gate electrode pattern
Implementation Method 2
The graphene diode can change the color of the emitted light through adjusting the voltage of the gate electrode. The principle is that the magnitude of the electric field generated by the gate electrode field can adjust the fermi level of the semiconductor graphene oxide in order to adjust the wavelength of the emitted light of the graphene
Data Source
AI summary
A graphene display is provided. The graphene display includes a first graphene light-emitting unit and a second graphene light-emitting unit which are stacked and overlapped, and a metal shield layer disposed between the first graphene light-emitting unit and the second graphene light-emitting unit. The graphene display is simple in structure, and the colors of the emitted light at the two sides will not change because of the electric field of the gate electrode pattern so as to have more stable color and color reproduction.