Array Substrate Conductive Layer for Crosstalk Reduction
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Solution Overview
Problem
In ultra-high PPI OLED displays, crosstalk of control signals occurs between adjacent pixel electrodes due to capacitance coupling, which affects display performance.
Innovation Solution
An array substrate with a conductive layer disposed above or below adjacent pixel electrodes, forming equivalent capacitances that are set equal to minimize crosstalk, using a conductive material like Mo, Ti, or Cu, and insulated by inorganic or organic films to reduce light reflection and enhance display contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel electrodes are arranged at ultra-high PPI density, then display resolution is improved, but capacitance coupling between adjacent pixel electrodes increases causing signal crosstalk
Solution Approach 1:
A conductive layer is introduced as an intermediary element positioned between adjacent pixel electrodes. This conductive layer forms equivalent capacitances with each pixel electrode, acting as a mediator to balance and equalize the capacitance coupling effects, thereby reducing signal crosstalk while maintaining ultra-high PPI display resolution
Solution Approach 2:
The patent modifies the electrical parameters of the system by introducing a conductive layer with specific electrical properties. By adjusting the position, area, and electrical characteristics of this conductive layer, the equivalent capacitances are optimized to equalize the coupling effects between adjacent pixel electrodes, reducing crosstalk in ultra-high PPI displays
2Reliability
If a conductive layer is added to reduce crosstalk, then signal quality is improved, but device structure complexity increases
Solution Approach 1:
The conductive layer serves multiple functions simultaneously: it reduces capacitance coupling between pixel electrodes, forms equivalent capacitances to balance electrical effects, and can be integrated with existing display layers. This multi-functionality allows crosstalk reduction without proportionally increasing overall device complexity
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 solution effectively reduces signal crosstalk and improves display performance by equalizing equivalent capacitances between pixel electrodes, thereby minimizing capacitance coupling effects and enhancing display quality.
Implementation Method 1
Crosstalk of control signals will occur between two adjacent pixel electrodes due to a capacitance coupling effect in a display
Implementation Method 2
a first equivalent capacitance is formed between the conductive layer and a first one of the two adjacent pixel electrodes and a second equivalent capacitance is formed between the conductive layer and a second one of the two adjacent pixel electrodes
Data Source
AI summary
Embodiments of the present disclosure provide an array substrate and a display apparatus having the array substrate. The array substrate includes: a plurality of pixel units which are arranged in an array and, which include a plurality of pixel electrodes arranged at intervals, respectively; a conductive layer disposed above or below two adjacent ones of the plurality of pixel electrodes, and configured such that when a preset electric potential is applied to the conductive layer, a first equivalent capacitance is formed between the conductive layer and a first one of the two adjacent pixel electrodes and a second equivalent capacitance is formed between the conductive layer and a second one of the two adjacent pixel electrodes.