OLED Display Circuit Layout for Irregular Corner Dead Space
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Solution Overview
Problem
In organic light emitting display devices, the non-display areas adjacent to the display area, which house driving circuits, often result in dead space due to irregularly shaped display areas, leading to inefficient use of space and potential short-circuit issues when driving circuits overlap.
Innovation Solution
The display device optimizes the layout of driving circuits by using different conductive layers for various components, such as the demultiplexing circuit unit and scan transmission line, and strategically positions them adjacent to irregularly shaped corners, ensuring they do not overlap and thus reducing dead space while preventing short-circuits through insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driving circuits are placed in non-display areas adjacent to irregularly shaped display areas, then the display device can include necessary functional components, but dead space increases and space utilization decreases
Solution Approach 1:
The patent utilizes multiple conductive layers (first through fifth conductive layers) to vertically separate different circuit components. By placing the demultiplexing circuit unit and scan transmission line in different conductive layers, the patent resolves the spatial conflict caused by irregular display area shapes, allowing both components to coexist without increasing dead space while maintaining functional completeness.
Solution Approach 2:
The patent divides the non-display area into distinct functional regions: one region for the demultiplexing circuit unit and another region for the scan transmission line. This segmentation allows each component to be optimally positioned and connected to its respective display area without interfering with the other, thereby reducing dead space while preserving all necessary functions.
2Area of stationary object
If driving circuits are positioned to maximize space utilization in irregularly shaped display areas, then dead space is reduced, but short-circuit risks increase due to potential overlap
Solution Approach 1:
The patent employs different conductive layers (first through fifth conductive layers) to vertically separate the demultiplexing circuit unit from the scan transmission line. This multi-layer approach allows both components to be positioned close to the display area for optimal space utilization while preventing horizontal overlap that could cause short-circuits, as each component operates in its own conductive layer plane.
3Ease of manufacture
If the demultiplexing circuit unit and scan transmission line are placed in the same conductive layer, then manufacturing is simpler, but short-circuit risks increase due to potential overlap
Solution Approach 1:
The patent places the demultiplexing circuit unit in one conductive layer and the scan transmission line in a different conductive layer. This vertical separation in the conductive layer dimension maintains manufacturing feasibility through standard multi-layer fabrication processes while effectively preventing short-circuits by eliminating the possibility of horizontal overlap between these two critical components.
4Area of stationary object
If driving circuits are布局 to follow irregular display area shapes, then dead space is reduced, but circuit layout complexity increases
Solution Approach 1:
The patent segments the driving circuits into distinct functional units (demultiplexing circuit unit and scan transmission line) that can be independently positioned and routed. This segmentation simplifies the overall layout complexity by allowing each segment to be optimized separately to match the irregular display area shape, rather than attempting to route a single complex circuit throughout the entire non-display area.
Data Source
AI summary
A display device, includes: a display area including an upper side, a lower side, a left side, a right side, and inclined corner portions where the upper, lower, left, and right sides meet; a demultiplexing circuit unit adjacent to the lower side of the display area and the corner portion connected thereto; and a scan transmission line which extends toward the display area from an outer side of the left side and overlaps with the demultiplexing circuit unit outside the corner portion, wherein the demultiplexing circuit unit includes a demultiplexer transistor, and the scan transmission line is formed of a different conductive layer from an electrode of a demultiplexer transistor.