Array Substrate Storage Capacitor Layout for Crosstalk Reduction
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Solution Overview
Problem
Display devices face issues with crosstalk and poor display quality due to inadequate storage capacitor structures, which affect the stability of pixel voltage and yield in different display modes.
Innovation Solution
The array substrate incorporates a storage capacitor structure formed by a storage electrode line and a source/drain metal layer or active layer, with a widened portion at the intersection with the data line, enhancing storage capacitance and preventing aperture ratio reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transparent electrodes are disposed on both sides of the display panel, then touch sensitivity and responsiveness are improved, but reflection between the two transparent electrodes causes image quality deterioration
Solution Approach 1:
The patent extracts and removes at least one transparent electrode from the dual-electrode configuration to eliminate the harmful reflection effect. By reducing from two transparent electrodes to one or zero, the reflection problem between electrodes is solved while maintaining sufficient touch sensitivity through alternative designs.
Solution Approach 2:
The patent converts the harmful reflection effect into a beneficial design constraint by using the reflection problem as the basis for optimizing electrode arrangement. The design deliberately positions or removes electrodes to prevent reflection while enhancing touch sensitivity through improved electrode transparency and conductivity balance.
2Manufacturing precision
If the number of transparent electrodes is reduced to eliminate reflection, then image quality is improved, but touch sensitivity and responsiveness may deteriorate
Solution Approach 1:
The patent applies local quality by optimizing the specific regions where transparent electrodes are placed. Instead of uniform electrode coverage, the design selectively positions electrodes in areas where they provide maximum touch sensitivity benefit while minimizing reflection risk, creating non-uniform electrode distribution tailored to functional requirements.
Solution Approach 2:
The patent changes key parameters of the transparent electrodes including material composition, thickness, and conductivity to achieve optimal balance. By adjusting these parameters, the electrodes maintain high transparency for reduced reflection while preserving sufficient conductivity for touch sensitivity, resolving the trade-off between image quality and touch responsiveness.
Data Source
Figure 1~2b
Figure 3a~4a
Figure 4b~6
AI summary
An array substrate and a display device are provided. The array substrate includes a base substrate (10) and a gate metal layer, an active layer and a source/drain metal layer disposed on the base substrate (10); the gate metal layer includes a gate line (102) and a storage electrode line (100) that extends in parallel to the gate line; the active layer (106) includes a first pattern taken as a channel region of a thin-film transistor (TFT) and a second pattern at least partially overlapped with the storage electrode line in a thickness direction of the base substrate, or the source/drain metal layer includes a data line pattern and a metal layer pattern (110) at least partially overlapped with the storage electrode line in the thickness direction of the base substrate. The array substrate can obtain large storage capacitance and hence improve the display effect of the display device.