Display Apparatus Insulating Layer Pixel Electrode Short Circuit
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Solution Overview
Problem
Current display technologies face challenges in achieving high-resolution, high-quality, and low-power consumption displays, particularly in devices like smartphones, tablets, and virtual/augmented reality devices, due to limitations in manufacturing precision and reliability of light-emitting devices.
Innovation Solution
A display apparatus structure featuring a transistor, insulating layers, and light-emitting devices with optimized pixel electrodes and EL layers, where the insulating layers are strategically positioned to enhance the light-emitting region and reduce the risk of short circuits, allowing for higher resolution and reliability through precise layer formation and reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the display resolution is increased, then the display quality is improved, but the manufacturing precision requirements increase and reliability decreases
Solution Approach 1:
The patent divides the light-emitting device into distinct segmented layers including the pixel electrode layer, EL layer, and insulating layers. Each layer is independently formed with specific patterns and positions, allowing precise control over the light-emitting regions while maintaining manufacturing reliability through modular fabrication processes
Solution Approach 2:
The patent implements local quality by creating specific structural features at critical locations: the pixel electrode is positioned to contact the insulating layer at defined regions, the EL layer is deposited to cover specific areas of the pixel electrode, and insulating layers are strategically placed to prevent short circuits only where needed. This localized optimization enables high resolution without requiring uniform high precision across the entire device
2Area of stationary object
If the aperture ratio is increased, then the display quality is improved, but the risk of short circuits between electrodes increases
Solution Approach 1:
The patent introduces insulating layers as intermediary structures between the pixel electrode and other conductive elements. These insulating layers act as mediators that electrically isolate adjacent electrodes while allowing the pixel electrode to extend to larger areas for higher aperture ratio. The insulating material fills gaps and provides physical separation, enabling closer electrode spacing without short circuit risk
Solution Approach 2:
The patent resolves the aperture ratio versus short circuit risk contradiction by transitioning to a multi-dimensional layered structure. Instead of relying solely on planar separation, the invention uses vertical layering with insulating layers positioned at different heights and depths. This three-dimensional arrangement allows electrodes to be closer in the planar view (higher aperture ratio) while maintaining electrical isolation through the thickness dimension
3Use of energy by moving object
If organic EL elements are used to eliminate backlights, then power consumption is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into the organic EL element structure itself. The pixel electrode, EL layer, and insulating layers are integrated into a single fabricated assembly that simultaneously provides light emission, electrical connection, and structural support. This consolidation eliminates the need for separate backlight units and reduces overall manufacturing complexity despite the advanced materials used
Solution Approach 2:
The organic EL element structure serves multiple functions: the pixel electrode provides both electrical connection and structural framework, the EL layer provides light emission and acts as an active functional layer, and the insulating layers provide both electrical isolation and mechanical support. This multi-functionality reduces the total number of components needed and simplifies the manufacturing process while achieving low power consumption
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 proposed structure enables high-resolution, high-quality displays with low power consumption and improved reliability by optimizing the light-emitting device configuration and manufacturing process, achieving a higher aperture ratio and reduced manufacturing costs.
Implementation Method 1
By voltage application to this element, light emission can be obtained from the light-emitting organic compound
Data Source
AI summary
A display apparatus with high display quality is provided. The display apparatus includes a transistor, a first insulating layer over the transistor, a plug electrically connected to the transistor, a second insulating layer over the first insulating layer, and a light-emitting device over the second insulating layer; a top surface of the first insulating layer includes a region that is substantially level with the plug; the light-emitting device includes a pixel electrode and an EL layer over the pixel electrode; the second insulating layer includes a first region interposed between the first insulating layer and a second pixel electrode; the first region overlaps with a light-emitting region of the light-emitting device; the pixel electrode is in contact with a top surface of the first region; in a top view, the second insulating layer includes a first end portion overlapping with the plug; at least part of the first end portion is covered with the pixel electrode; at least part of a side surface of the pixel electrode is covered with the EL layer; and the pixel electrode includes a region overlapping with a top surface of the plug and electrically connected to the plug.