Demultiplexing Circuit Overlap Reduces Dead Space in OLED Displays
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Solution Overview
Problem
Display devices, particularly OLEDs, face inefficiencies due to dead space in non-display areas where driving circuits are located, which reduces functionality and aesthetic appeal.
Innovation Solution
The arrangement of demultiplexing circuit units in a non-display area that overlaps with the display area, combined with signal wires and conductive layers, reduces dead space by optimizing the layout and connectivity of driving circuits within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driving circuits are arranged in the non-display area, then the functionality of the display device is improved, but the dead space increases and aesthetic appeal deteriorates
Solution Approach 1:
The patent applies dimensionality change by stacking the demultiplexing circuit unit vertically above the display area rather than placing it horizontally in the non-display area. This vertical arrangement in the thickness direction allows the non-display area to be fully utilized for display purposes while the driving circuits occupy the vertical space, thereby eliminating dead space and improving aesthetic appeal without compromising functionality.
2Adaptability or versatility
If driving circuits are arranged in the non-display area, then the functionality of the display device is improved, but the aesthetic appeal deteriorates
Solution Approach 1:
The patent applies dimensionality change by stacking the demultiplexing circuit unit vertically above the display area rather than placing it horizontally in the non-display area. This vertical arrangement in the thickness direction allows the non-display area to be fully utilized for display purposes while the driving circuits occupy the vertical space, thereby eliminating dead space and improving aesthetic appeal without compromising functionality.
3Area of stationary object
If demultiplexing circuit unit is stacked vertically above the display area, then dead space is reduced, but the complexity of the device structure increases
Solution Approach 1:
The patent utilizes the thickness direction (vertical dimension) to position the demultiplexing circuit unit above the display area. This approach converts a horizontal space constraint into a vertical arrangement, eliminating dead space in the planar view while maintaining a relatively simple layered structure that is consistent with standard OLED manufacturing processes.
Solution Approach 2:
The patent integrates the demultiplexing circuit unit with the OLED structure by using the same substrate and arranging multiple functional layers (conductive layers, insulating layers, emission layer) in a stacked configuration. This multi-functional integration allows the vertical stack to serve both display and driving circuit functions, reducing overall device complexity despite the three-dimensional arrangement.
Data Source
AI summary
A display device that includes a first area including a display area, a second area including a non-display area, and a third area connecting the first and second areas. A demultiplexing circuit unit is disposed in the non-display area of the second area and overlaps with the first area in a direction of a thickness of the display device.