Display Layout With Shift Area to Reduce Peripheral Dead Space
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Solution Overview
Problem
Conventional display devices have a significant dead space area where no image is displayed due to circuits located in the peripheral portion of the substrate, which occupies a substantial portion of the display area.
Innovation Solution
The display device is designed with a substrate that includes a shift area, a main display area, and an extended display area, featuring pixel circuits and display elements arranged in specific configurations to minimize the dead space, with dummy electrodes and pixel-defining layers to optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If circuits are located in the peripheral portion of the substrate, then the pixel circuits can be properly arranged for display element control, but the dead space area increases reducing effective display area
Solution Approach 1:
The patent extends the display area beyond the main display region into the peripheral portion where circuits are located. By adding an extended display area that overlaps with the peripheral circuit region, the invention converts the wasted dead space into usable display area, effectively utilizing the peripheral zone for dual purposes: circuit operation and image display.
Solution Approach 2:
The invention merges the peripheral circuit region with the extended display area, allowing both functions to coexist in the same spatial zone. The peripheral circuits are positioned to overlap with the extended display area, combining the circuit function and display function in the same region, thereby eliminating the traditional separation between active display area and circuit area.
2Area of stationary object
If pixel circuits are disposed in the shift area, then the display area can be extended, but the circuit layout complexity increases
Solution Approach 1:
The substrate is divided into distinct functional zones: a main display area for primary image display, a shift area containing pixel circuits that overlap with the main display area, and an extended display area that overlaps with the peripheral circuit region. This segmentation allows each zone to be optimized for its specific function while maintaining overall integration.
Solution Approach 2:
The patent utilizes overlapping arrangements in the vertical dimension (z-direction) to resolve horizontal space conflicts. Pixel circuits in the shift area overlap with the main display area, while peripheral circuits overlap with the extended display area, effectively using three-dimensional spatial arrangement to achieve dual functionality without increasing planar complexity.
3Area of stationary object
If dummy electrodes are used to overlap with pixel circuits, then the dead space is reduced, but the device structure becomes more complex
Solution Approach 1:
The dummy electrodes in the extended display area serve multiple functions: they act as display electrodes for image generation, provide electrical connection to pixel circuits through connection wires, and help reduce the dead space area. This multi-functionality eliminates the need for separate dummy structures that would otherwise be required solely for space-filling purposes.
Solution Approach 2:
Connection wires serve as intermediaries that electrically connect the dummy electrodes in the extended display area to the pixel circuits in the shift area. This intermediary connection enables the dummy electrodes to function as active display elements while maintaining proper electrical integration with the pixel circuitry, thereby reducing dead space without isolating the extended area from the main display system.
Data Source
AI summary
A display device includes a substrate including a shift area, a main display area, and an extended display area, a first pixel circuit disposed in the shift area, a second pixel circuit and third pixel circuit which are disposed in the main display area, a first display element disposed in the main display area and including a first pixel electrode electrically connected to the first pixel circuit and a first emission layer, a second display element disposed in the main display area and including a second pixel electrode electrically connected to the second pixel circuit and a second emission layer, a third display element disposed in the extended display area and including a third pixel electrode electrically connected to the third pixel circuit and a third emission layer, and a dummy electrode disposed in the shift area and electrically connected to the first pixel circuit.