Pixel Circuit Layout Using Overlapped Gate Line and Electrode
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Solution Overview
Problem
Existing display devices face challenges in miniaturization and efficiency due to the increasing number of components, which requires improved area utilization in the display device.
Innovation Solution
The display device incorporates a gate electrode and a gate signal line that overlap and extend in the same direction, along with an insulating layer and contact holes, to enhance pixel area efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of components in the display device is increased to achieve superior performance, then display performance is improved, but the area occupied by components increases, making miniaturization difficult
Solution Approach 1:
The gate signal line is positioned to overlap with the gate electrode in the vertical dimension rather than extending horizontally alongside it. This three-dimensional arrangement allows the gate signal line to occupy space above the gate electrode, effectively utilizing the vertical dimension to reduce horizontal footprint and enable miniaturization while maintaining all necessary components for superior display performance
Solution Approach 2:
The gate signal line is nested above the gate electrode, with both structures occupying overlapping horizontal footprints. This nesting arrangement allows multiple components to share the same horizontal space by stacking them vertically, reducing the overall area required for each pixel while maintaining the functionality of all components
2Area of stationary object
If components are arranged to minimize area for miniaturization, then area efficiency is improved, but component layout becomes complex and manufacturing difficulty increases
Solution Approach 1:
By moving the gate signal line to overlap vertically with the gate electrode rather than arranging it horizontally adjacent to other components, the patent simplifies the lateral layout. This vertical stacking approach reduces the complexity of planar component arrangement while achieving compact pixel areas, making the structure easier to manufacture through standard thin-film deposition processes
Data Source
AI summary
A display device includes an active pattern, a gate electrode, a gate signal line, and a light emitting diode. The active pattern is disposed on a substrate. The gate electrode is disposed on the active pattern and overlaps the active pattern in a plan view. The gate electrode defines a channel area in an area overlapping the active pattern in a plan view. The gate signal line is disposed on the gate electrode. The gate signal line overlaps the channel area in a plan view. The gate signal line transmits a gate signal to the gate electrode. The light emitting diode is disposed on the gate signal line.