Display Pixel Circuit Shielding for High-Resolution Layouts
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Solution Overview
Problem
The challenge of manufacturing high-resolution display devices lies in efficiently arranging electronic elements in a narrow area, which is not adequately addressed by existing technologies.
Innovation Solution
The display device incorporates a pixel circuit with a driving transistor, an initialization transistor, and a connection electrode, featuring a semiconductor layer extension area that overlaps shield layers, along with a vertical and horizontal voltage line configuration, utilizing silicon and oxide semiconductor layers to enhance pixel circuit efficiency and light-emitting diodes of different colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electronic elements are arranged in a narrow area to manufacture high-resolution display devices, then display resolution is improved, but device complexity increases
Solution Approach 1:
The patent utilizes multi-layer stacking to arrange electronic elements vertically in different dimensions. The first and second pixel circuits are positioned at different vertical levels with their respective transistor layers and connection electrodes stacked above one another, enabling high-resolution display functionality while managing complexity through spatial organization in the vertical dimension rather than horizontal crowding
Solution Approach 2:
The pixel circuit is divided into multiple independent functional modules including first and second transistors with separate semiconductor layers, gate electrodes, and connection electrodes. Each transistor is further segmented into distinct regions (channel area, source area, drain area) that can be independently configured, allowing optimized arrangement of electronic elements to achieve high resolution while maintaining manageable device complexity through modular design
2Loss of energy
If the semiconductor layer extension area overlaps shield layers, then leakage current is minimized and power consumption is reduced, but device complexity increases
Solution Approach 1:
Shield layers are introduced as intermediary structures positioned between the semiconductor layer extension area and other circuit elements. These shield layers act as mediators that electrically isolate and protect the semiconductor region, reducing leakage current and power consumption while confining the complexity of shielding structures to specific strategic locations rather than throughout the entire device
Solution Approach 2:
The shield layers are selectively positioned only in specific regions where they are most effective - overlapping the semiconductor layer extension area where leakage current is a concern. This localized application of shielding structures minimizes their impact on overall device complexity while achieving the energy loss reduction benefit where it is most needed
3Illumination intensity
If multiple shield layers are disposed above and below the semiconductor layer, then brightness consistency is maintained, but manufacturing complexity increases
Solution Approach 1:
The shield layers serve multiple functions simultaneously: they provide electrical shielding to reduce leakage current, maintain brightness consistency across the display, and act as structural support layers in the multi-layer stack. This multi-functionality reduces the need for separate dedicated structures, thereby easing manufacturing despite the presence of multiple layers
Data Source
AI summary
A display device includes a first pixel circuit disposed on a substrate and a first light-emitting diode electrically connected to the first pixel circuit, the first pixel circuit includes a driving transistor including a driving semiconductor layer and a driving gate electrode, a first initialization transistor including a first initialization semiconductor layer and a first initialization gate electrode and electrically connected to the driving transistor, and a first connection electrode electrically connecting the first initialization semiconductor layer to the driving gate electrode, a semiconductor layer including the first initialization semiconductor layer includes a first extension area extending from a channel area of the first initialization semiconductor layer to the first connection electrode, and the first extension area overlaps a first shield layer disposed under the first initialization semiconductor layer and a second shield layer disposed above the first initialization semiconductor layer.