Display Substrate Power Bus Shielding for Crosstalk Reduction
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Solution Overview
Problem
The compact layout of control circuits and power buses in display substrates, particularly in large-screen and narrow-frame display devices, leads to signal crosstalk issues due to limited layout space, affecting the accuracy of signal transmission and display quality.
Innovation Solution
The display substrate incorporates a base substrate with sub-pixels, power signal lines, and power signal buses, where the second power signal bus surrounds the first power signal bus in the peripheral region, effectively shielding it from electromagnetic interference and improving signal transmission accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If control circuits and power buses are compactly laid out to achieve large-screen and narrow-frame display devices, then the display area is increased and frame width is reduced, but signal crosstalk occurs due to limited layout space
Solution Approach 1:
A shielding layer is introduced as an intermediary component between the control circuits and power buses. This shielding layer acts as a mediator that blocks electromagnetic interference and prevents signal crosstalk while allowing the compact layout to be maintained. The shielding layer is disposed between the control circuit and the power bus, creating a protective barrier that eliminates the harmful electromagnetic coupling between adjacent circuits.
2Length of stationary object
If control circuits and power buses are compactly laid out, then the frame width is reduced, but signal transmission accuracy deteriorates due to electromagnetic interference
Solution Approach 1:
The shielding layer serves as a protective intermediary that maintains signal transmission accuracy even in the compact narrow-frame configuration. By positioning the shielding layer between the control circuits and power buses, electromagnetic interference is blocked, ensuring that signal transmission accuracy is preserved despite the reduced frame width and increased circuit density.
3Length of stationary object
If limited layout space is used to achieve narrow-frame design, then frame width is reduced, but signal crosstalk increases affecting display quality
Solution Approach 1:
The shielding layer is introduced as a protective intermediary that enables the narrow-frame design to be realized without suffering from signal crosstalk issues. The shielding layer is strategically positioned between the control circuits and power buses within the limited layout space, blocking electromagnetic interference and allowing the narrow-frame configuration to maintain high display quality.
Solution Approach 2:
The shielding layer is implemented as a thin film structure that can be integrated into the compact layout without significantly increasing the overall thickness or complexity of the display device. This thin film shielding approach allows the narrow-frame design to be achieved while providing effective electromagnetic interference protection within the constrained space.
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
This configuration enhances the accuracy of signal transmission for the first power signal bus, reducing signal crosstalk and improving the display effect by providing electromagnetic shielding and optimizing the layout of control circuits and power buses.
Implementation Method 1
the second power signal bus includes a first part disposed on a side of the first power signal bus close to the display region, and a second part disposed on a side of the first power signal bus away from the display region, so as to at least partially surround the first power signal bus
Data Source
AI summary
The disclosure provides a display substrate, which has a display region and a peripheral region, and includes a base substrate, a plurality of sub-pixels, a first power signal line and a second power signal line at least partially located in the display region, a first power signal bus and a second power signal bus located in the peripheral region; the sub-pixels are located in the display region; the first power signal line and the second power signal line are electrically connected to the first power signal bus and the second power signal bus, respectively; the second power signal bus includes a first part disposed on a side of the first power signal bus close to the display region, and a second part disposed on a side of the first power signal bus away from the display region, so as to at least partially surround the first power signal bus.