AMOLED Sub-Display Powerline Segmentation for IR Drop
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Solution Overview
Problem
In AMOLED display panels, IR drop causes non-uniform luminosity due to voltage differences across powerlines, affecting display quality.
Innovation Solution
The display panel is divided into sub-areas with independent powerlines in non-display areas, ensuring each organic light emitting diode receives the same power voltage, eliminating IR drop and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If powerlines are used to supply voltage to OLED devices in AMOLED display panels, then the OLED devices can be powered and operate, but voltage drop occurs along the powerlines causing non-uniform luminosity and display quality degradation
Solution Approach 1:
The patent divides the display area into multiple sub-display areas (first, second, third sub-display areas) with independent power supply systems. Each sub-display area has its own dedicated powerlines connected to separate power supply terminals, preventing voltage drop from affecting the entire display uniformly. This segmentation ensures that voltage variations in one sub-display area do not impact other areas, thereby maintaining luminosity uniformity across the whole display.
Solution Approach 2:
The patent implements localized power supply by providing dedicated powerlines and power supply terminals for each sub-display area. This allows each region to have optimized power delivery independent of other regions, ensuring that local voltage requirements are met without being affected by current draw from distant areas, thus maintaining consistent luminosity quality across different parts of the display.
2Ease of manufacture
If conventional powerline layout is used in AMOLED display panels, then the structure is simple and manufacturing is easy, but IR drop causes different areas to have different currents affecting display quality
Solution Approach 1:
The display area is divided into multiple sub-display areas with independent power supply systems. Each sub-display area has dedicated powerlines and power supply terminals, creating separate electrical zones that prevent voltage drop from propagating across the entire display. This segmentation maintains manufacturing feasibility while significantly improving display quality consistency by isolating electrical variations to local regions only.
Data Source
AI summary
The present invention discloses a display panel. The display panel, comprises a substrate. The substrate includes a plurality of display areas and a plurality of non-display areas surrounded by the display areas, wherein each of the display areas is divided into at least two sub display areas along a predetermined direction; a boundary between the sub-display areas is a straight line or a polyline; and a plurality of organic light emitting diodes is disposed in the sub-display areas; and a plurality of powerlines, disposed on the periphery of each of the sub-display areas, wherein the powerlines are located in the non-display areas; the powerlines on the periphery of display areas are independent from each other and a power voltage is applied on the organic light emitting diodes of each of the sub-display areas via the powerlines so that each of the organic light emitting diodes receives the same power voltage.