AMOLED Pixel Circuit Shielding Layout for Gate-Line Voltage Coupling
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Solution Overview
Problem
The voltage changes induced by gate lines in active matrix organic light-emitting diode (AMOLED) display devices can cause damage to the light-emitting diodes, reducing their service life.
Innovation Solution
The introduction of spacers between connection electrodes and gate lines, arranged in the same layer, to mitigate voltage jumps and reduce damage to the light-emitting diodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate lines are positioned close to connection electrodes to reduce parasitic capacitance, then signal transmission efficiency is improved, but voltage jumps from gate lines directly affect the connection electrodes, reducing light-emitting diode service life
Solution Approach 1:
The patent introduces a shielding electrode as an intermediary component positioned between the gate line and the connection electrode. This shielding electrode acts as a mediator that blocks the harmful voltage jumps from the gate line while allowing necessary electrical connections to be maintained. The shielding electrode is connected to a stable potential (such as ground or power supply voltage) to provide electrostatic shielding, thereby protecting the connection electrode and light-emitting diode from voltage fluctuations without significantly increasing parasitic capacitance.
2Reliability
If spacers are added between connection electrodes and gate lines to reduce voltage coupling, then light-emitting diode protection is improved, but device structure complexity increases
Solution Approach 1:
The patent combines the shielding electrode with existing structural elements in the display device. The shielding electrode is integrated into the same layer as the gate line or connection electrode, and its function is merged with the overall electrode structure. This merging approach allows the shielding function to be added without requiring completely separate components, thereby reducing the increase in device complexity while still providing effective protection against voltage jumps.
Data Source
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AI summary
Provided in at least one embodiment of the present invention are a display panel and a display apparatus. The display panel comprises a base substrate; and a pixel circuit, which is provided on the base substrate, the pixel circuit comprising an induction transistor, a drive transistor, a first gate line and a second gate line, wherein a first source-drain electrode of the induction transistor is electrically connected to a first source-drain electrode of the drive transistor by means of a first connecting electrode; the first gate line and the second gate line extend in a first direction; spacing portions are provided between the first connecting electrode and the first gate line and between the first connecting electrode and the second gate line in a second direction that intersects with the first direction; the first connecting electrode, the first gate line, the second gate line and the spacing portions are provided on the same layer; and spacing portions, which are located on a third metal layer, are respectively provided between the induction transistor and the first gate line and the second gate line which are located on the two sides of the induction transistor in the second direction, and the spacing portions can shield the coupling between the first source-drain electrode of the induction transistor and the first gate line or the second gate line.