Two-Dimensional Material Display Structure for Micrometer Pixels
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Solution Overview
Problem
Existing display devices face challenges in achieving high resolution and efficient light emission using two-dimensional materials, particularly in applications requiring virtual reality systems, where improved luminous efficiency and pixel density are desired.
Innovation Solution
A display device structure incorporating a pixel circuit layer with a base layer and a display layer, featuring a light emitting stacked structure with a two-dimensional material separated by insulating layers, and electrodes configured to control charge carrier concentration and emit light through impact excitation, allowing for high-resolution, color-emitting sub-pixels without color filters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If two-dimensional materials are used as light emitting elements, then luminous efficiency is improved, but device complexity increases due to the need for insulating layers and specific electrode configurations
Solution Approach 1:
The light emitting element is segmented into distinct functional layers: a two-dimensional material light emitting layer, first insulating layers separating it from electrodes, and specific electrode structures. This segmentation allows each component to perform its function optimally while managing complexity through modular design.
Solution Approach 2:
Insulating layers are introduced as intermediary elements between the two-dimensional material light emitting layer and the electrodes. These intermediaries prevent direct contact that would cause short circuits while allowing the electric field to penetrate and control charge carriers, thus maintaining luminous efficiency without compromising device integrity.
2Area of moving object
If pixel size is reduced to increase resolution, then area is reduced, but manufacturing precision requirements increase
Solution Approach 1:
Two-dimensional materials with atomic thickness are used as the light emitting layer, enabling extremely small pixel sizes while maintaining uniformity and control. The thin film nature of these materials allows precise deposition and patterning even at micrometer-scale pixel dimensions.
Solution Approach 2:
The invention changes the dimensional parameters of the light emitting material to two-dimensional atomic layers, which fundamentally alters the scaling behavior. This allows pixel sizes to be reduced to micrometers while the intrinsic uniformity of the two-dimensional material maintains manufacturing precision.
3Device complexity
If sub-pixels emit different colors without color filters, then device complexity is reduced, but manufacturing precision requirements increase for material selection
Solution Approach 1:
Different two-dimensional materials with specific bandgap energies are selected for different sub-pixel locations to emit different colors (red, green, blue). This local differentiation of material properties eliminates the need for color filters while achieving full-color display through precise material selection at each sub-pixel position.
Solution Approach 2:
The invention uses composite structures combining different two-dimensional materials (such as transition metal dichalcogenides with different compositions) to achieve different emission colors. Each material's unique electronic structure provides specific color emission, creating a composite light emitting system without color filters.
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-resolution display devices with enhanced luminous efficiency and concurrent light emission across sub-pixels, reducing pixel size to micrometers and minimizing light loss, while being robust against cross-talk and simplifying manufacturing processes.
Implementation Method 1
electrodes configured to control charge carrier concentration and emit light through impact excitation
Data Source
AI summary
A display device according to one or more embodiments of the disclosure includes a pixel circuit layer including a base layer and circuit elements on the base layer; and a display layer on the pixel circuit layer. The display layer includes a first electrode on the pixel circuit layer; an insulating layer on the first electrode; a second electrode on the insulating layer; a light emitting stacked structure on the second electrode and including a first insulating layer, a second insulating layer, and a light emitting layer between the first insulating layer and the second insulating layer; and a third electrode on the light emitting stacked structure. The light emitting layer includes a two-dimensional material, is separated from the second electrode by the first insulating layer, and is separated from the third electrode by the second insulating layer.