Display Substrate Touch Trace Shielding for Stable Scan Signals
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Solution Overview
Problem
Existing display technologies face challenges in efficiently driving gate and light-emitting control signals in display substrates, particularly in ensuring stable signal levels and reducing signal interference, which affects the quality and efficiency of image display.
Innovation Solution
The display substrate incorporates a gate scan driving circuit with stabilizing capacitors and a light-emitting control scan driving circuit, featuring specific capacitance ratios and shielding layers to stabilize signal levels and minimize interference, along with a structured layout of transistors and capacitors to enhance signal control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stabilizing capacitors are added to the gate scan driving circuit and light-emitting control scan driving circuit, then signal stability is improved, but device complexity increases
Solution Approach 1:
The patent divides the driving circuit into separate functional modules: a gate scan driving circuit for generating gate scan signals and a light-emitting control scan driving circuit for generating light-emitting control signals. Each module includes its own stabilizing capacitor (first stabilizing capacitor in the gate scan driving circuit, second stabilizing capacitor in the light-emitting control scan driving circuit), allowing independent optimization of signal stability for each function while managing overall circuit complexity through modular architecture.
2Object-affected harmful factors
If shielding layers are introduced between signal paths, then signal interference is reduced, but device complexity increases
Solution Approach 1:
The patent introduces shielding layers as intermediary structures positioned between the gate scan driving circuit and the light-emitting control scan driving circuit. These shielding layers act as mediators that block electromagnetic interference between the two circuits without requiring physical separation or complex isolation mechanisms, thereby reducing signal interference while adding minimal structural complexity.
3Object-affected harmful factors
If the light-emitting control scan driving circuit is separated from the gate scan driving circuit, then signal interference is reduced, but device complexity increases
Solution Approach 1:
The patent implements separate circuit layouts for the gate scan driving circuit and the light-emitting control scan driving circuit, with each circuit occupying distinct regions on the substrate. The gate scan driving circuit is positioned in one region while the light-emitting control scan driving circuit is positioned in another region, physically separating the signal generation paths to minimize interference while maintaining manageable layout complexity through systematic arrangement.
Data Source
AI summary
A display substrate is provided. The display substrate includes a base substrate including a display region and a peripheral region, a gate scan driving circuit, a light-emitting control scan driving circuit, a first power line, a first planarization layer, a second planarization layer and a first shielding layer, a second shielding layer and a plurality of touch traces. The first planarization layer and the second planarization layer further include an open slot. An orthographic projection of at least part of the touch traces on the base substrate falls into the open slot. In an area of the open slot, an orthographic projection of the second shielding layer on the base substrate overlaps with an orthographic projection of a part of the touch traces on the base substrate.