Display Panel Power Wire Layout for IR Drop Compensation
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Solution Overview
Problem
The resistance of power wires in display panels leads to an ohmic voltage drop (IR drop) resulting in uneven brightness and reduced display quality due to increasing impedance from the driving chip to the panel edges.
Innovation Solution
Incorporating an auxiliary electrode connected to wire segments of power wires, forming a parallel resistance to reduce impedance and compensate for voltage drops during signal transmission, thereby improving brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If power wires are used to transmit power signals to light-emitting units, then power supply is achieved, but impedance increases from driving chip to panel edges causing IR drop and brightness non-uniformity
Solution Approach 1:
The power wire is divided into multiple wire segments along the first direction, with each segment corresponding to a light-emitting unit. Auxiliary electrodes are disposed between adjacent wire segments to create multiple parallel current paths, reducing the overall impedance and compensating for voltage drops across different regions of the display panel.
Solution Approach 2:
Auxiliary electrodes are introduced as intermediary elements between the power wire segments. These auxiliary electrodes serve as mediators that provide additional current distribution paths, reducing the impedance between the driving chip and distant light-emitting units, thereby compensating for IR drop and improving brightness uniformity.
2Power
If power wires extend across the display panel, then power delivery is achieved, but resistance causes voltage drop and reduces display quality
Solution Approach 1:
The power transmission path is segmented into multiple wire segments with auxiliary electrodes positioned between them. This segmentation creates parallel current paths that reduce the total resistance, allowing effective power delivery while minimizing energy loss through reduced voltage drop across the panel.
Solution Approach 2:
Multiple wire segments are electrically combined through auxiliary electrodes to form a parallel network. This merging of multiple current paths reduces the overall impedance and resistance, enabling efficient power delivery with minimized energy loss and voltage drop.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The auxiliary electrode compensates for voltage losses along the power wires, enhancing brightness uniformity and overall display quality by reducing IR drops across the panel.
Implementation Method 1
by using the auxiliary electrode as a parallel resistance of the power wires, the impedance of the power wires is reduced, and the voltage drop of the power wires during the signal transmission process is reduced
Data Source
AI summary
The present disclosure provides a display panel and an electronic device, the display panel comprises a substrate and a plurality of light-emitting units, a plurality of power wires, and an auxiliary electrode disposed on the substrate; the power wires extend in a first direction, and are disposed between adjacent light-emitting units, and the power wires are connected to the light-emitting units; and the auxiliary electrode disposed on a surface of the power wires close to or away from the substrate; the power wires comprise a plurality of wire segments, each of the wire segments corresponds to one of the light-emitting units, and each of the wire segments is connected to the auxiliary electrode.