Display Panel Grid Signal Line Layout for Lower Voltage Drop
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Solution Overview
Problem
Existing display panels face high power consumption due to large voltage drops on signal lines, which can be mitigated by increasing supply voltage or signal line width, but this affects resolution and design complexity.
Innovation Solution
A display panel design featuring a grid-like first signal line with portions in different layers, reducing voltage drop without increasing panel thickness or manufacturing costs, and maintaining constant supply voltage to light-emitting devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the width of the signal line transmitting the supply voltage is increased, then the voltage drop is reduced, but the resolution of the display panel is affected and the design difficulty increases
Solution Approach 1:
The signal line is transformed from a planar structure to a three-dimensional multi-layer structure. The first signal line includes first portions and second portions provided in different layers, allowing the line to extend in multiple directions and layers simultaneously. This dimensional change enables the signal line to achieve longer effective conduction paths and lower resistance without occupying more area on the substrate, thus reducing voltage drop while maintaining high resolution.
Solution Approach 2:
The signal line is segmented into multiple portions located in different layers. The first portions and second portions are electrically connected through vertical connections between layers, creating a segmented but continuous conduction path. This segmentation allows each layer to contribute to the overall conduction, effectively distributing the current flow and reducing the voltage drop without requiring any single layer to have excessively wide traces.
2Reliability
If the value of the supply voltage output by the chip is increased, then the pixel circuit obtains a more ideal supply voltage, but the power consumption of the display panel increases
Solution Approach 1:
The invention changes the physical parameters of the signal line transmission system by introducing multi-layer structures and optimizing the layout of signal lines. This reduces the resistance and voltage drop in the signal transmission path, allowing the system to maintain stable supply voltage to pixel circuits without needing to increase the output voltage from the chip, thereby avoiding increased power consumption.
3Ease of manufacture
If the first signal line is provided in a single layer, then the manufacturing process is simpler, but the voltage drop cannot be effectively reduced
Solution Approach 1:
The signal line structure transitions from a single-layer planar configuration to a multi-layer three-dimensional configuration. The first portions and second portions are provided in different layers and electrically connected, enabling the signal line to utilize vertical space for conduction. This approach effectively reduces voltage drop by creating longer and more flexible conduction paths without significantly complicating the manufacturing process, as multi-layer structures are standard in modern display panel fabrication.
Data Source
AI summary
Embodiments of the present disclosure provide a display panel and a display apparatus. The display panel includes: a substrate; a plurality of pixel circuits, a plurality of light-emitting devices, and a first signal line that are located on a side of the substrate. An output terminal of each of the pixel circuits is electrically connected to a first electrode of one of the light-emitting devices, and a second electrode of each of the plurality of light-emitting devices is electrically connected to the first signal line; and the first signal line comprises first portions and second portions provided in different layers and electrically connected, the first portions extend along a first direction, the second portions extend along a second direction, and the first direction intersects the second direction. The first signal line is of a grid-like structure, and thus a signal transmitted therethrough has a smaller voltage drop.