Display Device Gate Electrode Overlap Open Area Signal Interference
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Solution Overview
Problem
Existing display devices face signal delay and reliability issues due to electrical signal interference between electrode patterns, which affects the quality of the display.
Innovation Solution
The display device incorporates a pixel circuit layer with a specific electrode structure, including a first gate electrode that overlaps an open area, forming a capacitance with a second electrode, and a bridge electrode layer electrically connected to the first electrode, to minimize signal interference and enhance signal reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrode patterns are used to drive the light emitting element, then electrical signals can be transmitted, but signal interference and delay occur reducing reliability
Solution Approach 1:
The patent extracts the problematic overlapping conductive layers and replaces them with an open area structure. The gate electrode is designed to overlap an open area rather than another conductive layer, eliminating the source of electrical signal interference while maintaining the necessary electrical connections for driving the light emitting element.
Solution Approach 2:
The patent introduces an open area as an intermediary space between the gate electrode and the light emitting element. This open area acts as a mediator that prevents direct electrical interference between conductive layers while still allowing the gate electrode to control the light emitting element through the active layer, thus resolving the signal interference problem.
2Reliability
If multiple electrode patterns are used for pixel circuit, then complete circuit functionality is achieved, but signal delay increases
Solution Approach 1:
The patent segments the pixel circuit into distinct functional areas with the gate electrode positioned over an open area. This segmentation allows for optimized signal paths and reduces the distance electrical signals must travel through overlapping conductive layers, thereby reducing signal delay while maintaining complete circuit functionality.
Solution Approach 2:
The patent utilizes the vertical dimension by positioning the gate electrode in a different layer than the light emitting element, with an open area in between. This dimensional arrangement allows electrical signals to be transmitted more efficiently by avoiding horizontal traversal through multiple overlapping conductive layers, thus reducing signal delay.
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 improves the reliability of electrical signals within the display device, reducing the risk of signal delay and horizontal crosstalk, thereby enhancing display quality.
Implementation Method 1
the first gate electrode may form a capacitance with the second electrode
Data Source
AI summary
An embodiment provides a display device including a pixel circuit layer including a base layer and a pixel circuit; and a light emitting element disposed on the pixel circuit layer and including a first electrode, a second electrode, and a light emitting layer electrically connected the first electrode and the second electrode. The pixel circuit includes a first transistor. The first transistor includes a first gate electrode, a first active layer, a first source electrode, and a first drain electrode. The first electrode forms an open area. The first gate electrode and the open area overlap each other in a plan view.