Island-Shaped Light-Emitting Layers for High Aperture Ratio Displays
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Solution Overview
Problem
Existing display apparatuses face challenges in achieving high aperture ratio, high display quality, reliability, easy resolution enhancement, and low power consumption.
Innovation Solution
A display apparatus is designed with a specific structure including first and second pixels, coloring layers, conductive layers, and insulating layers, where the light-emitting layers are processed into an island shape to inhibit leakage current and enhance display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light-emitting layers are arranged in a continuous structure, then the manufacturing process is simpler, but leakage current occurs between adjacent pixels reducing display quality
Solution Approach 1:
The light-emitting layers are processed into island-shaped structures that are physically separated from each other. This segmentation prevents leakage current between adjacent pixels while maintaining manufacturing feasibility through a single formation step followed by pattern processing.
2Reliability
If the aperture ratio is increased to improve display quality, then more light is emitted, but the distance between adjacent pixels decreases causing increased leakage current
Solution Approach 1:
By segmenting the light-emitting layers into isolated islands, the patent enables higher aperture ratios without the risk of leakage current. The physical separation between island-shaped light-emitting layers eliminates the harmful interaction even when pixels are closely spaced.
3Manufacturing precision
If higher resolution is achieved by reducing pixel size, then display detail is improved, but the aperture ratio decreases reducing light emission
Solution Approach 1:
The island-shaped light-emitting layers enable high-resolution displays with maintained aperture ratios. The segmented structure allows pixels to be placed closer together without sacrificing the light-emitting area, as each island is self-contained and does not interfere with adjacent pixels.
4Loss of energy
If conventional continuous light-emitting layers are used, then power consumption is higher due to leakage current, but manufacturing is simpler
Solution Approach 1:
The patent processes light-emitting layers into island shapes that are formed in a single deposition step followed by pattern definition. This segmented approach eliminates leakage current and reduces power consumption while adding minimal manufacturing complexity through standard processing techniques.
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 a display apparatus with a high aperture ratio, high display quality, improved reliability, and reduced power consumption, while also facilitating easier achievement of higher resolutions.
Implementation Method 1
A wavelength range of light that the second coloring layer transmits is different from a wavelength range of light that the first coloring layer transmits
Implementation Method 2
By applying voltage to this element, light emission can be obtained from the light-emitting organic compound
Data Source
AI summary
A display apparatus with a high aperture ratio is provided. The display apparatus includes a first pixel, a second pixel, a first coloring layer, a second coloring layer, a first conductive layer, a second conductive layer, and a first insulating layer. The first pixel includes a first pixel electrode, a first EL layer over the first pixel electrode, and a common electrode over the first EL layer. The second pixel includes a second pixel electrode, a second EL layer over the second pixel electrode, and the common electrode over the second EL layer. The second pixel is placed to be adjacent to the first pixel. The first coloring layer is placed to overlap with the first pixel. The second coloring layer is placed to overlap with the second pixel. The wavelength range of light that the second coloring layer transmits is different from a wavelength range of light that the first coloring layer transmits. The first conductive layer is placed over the common electrode. The first insulating layer is placed over the first conductive layer. The second conductive layer is placed over the first insulating layer. One or both of the first conductive layer and the second conductive layer overlap with a region interposed between the first EL layer and the second EL layer. A side surface of the first EL layer and a side surface of the second EL layer are placed to face each other.