Display Device Crosstalk Reduction via Shielding Layer
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Solution Overview
Problem
In high-speed operation of display devices, crosstalk effects due to capacitance between wirings can lead to reduced reliability and visibility issues.
Innovation Solution
The display device incorporates a specific layer structure with a protrusion and groove configuration in the conductive layers to minimize overlap and capacitance between the electrode voltage line and data line, using a first conductive layer with a protrusion that extends in a second direction to shield and reduce visibility of crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed operation is implemented to improve display performance, then response speed is improved, but crosstalk effects become perceptible due to capacitance between wirings
Solution Approach 1:
A shielding conductive layer is introduced between the first conductive layer and the second conductive layer to act as an intermediary that blocks capacitive coupling. This shielding layer reduces the harmful crosstalk effects while allowing the high-speed operation to continue, thus resolving the contradiction between speed improvement and crosstalk reduction.
Solution Approach 2:
The harmful capacitive coupling effect is extracted and isolated by introducing a separate shielding conductive layer. This layer specifically targets and removes the crosstalk component without affecting the functional signal transmission, enabling high-speed operation with reduced crosstalk.
2Device complexity
If conductive layers are positioned close together to reduce device thickness, then device complexity is reduced, but capacitance between wirings increases causing crosstalk
Solution Approach 1:
The shielding conductive layer serves as a mediator that allows the conductive layers to remain close together for device simplicity while blocking the harmful capacitive coupling. The shielding layer is positioned between the first and second conductive layers to prevent direct capacitive interaction.
Solution Approach 2:
The patent uses a composite structure of multiple conductive layers with different functions. The first conductive layer carries signals, the second conductive layer provides additional functionality, and the intermediate shielding layer blocks capacitive coupling. This composite approach maintains device simplicity while reducing crosstalk.
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 effectively reduces crosstalk visibility and enhances the reliability of the display device during high-speed operations by minimizing the overlap between conductive layers, thereby improving the overall performance.
Implementation Method 1
effects due to crosstalk may be perceptible due to a capacitance formed between wirings during a high-speed operation
Data Source
AI summary
A display device having an improved reliability includes a substrate including a display area in which a display element is arranged, a first conductive layer extending in a first direction on a plane, located in the display area, and including a protrusion protruding in a second direction crossing the first direction, a first insulating layer on the first conductive layer, a second conductive layer extending in the first direction on a plane, located on the first insulating layer, and defining a groove overlapping the protrusion of the first conductive layer, a second insulating layer on the second conductive layer, and a third conductive layer extending in the second direction on a plane, located on the second insulating layer, and overlapping the protrusion of the first conductive layer.