Display Device Electrode Extension for Capacitance Balancing
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Solution Overview
Problem
Display devices face challenges in reducing capacitance deviation between pixels and data lines, which affects image quality by causing uneven capacitance between different pixel and data line connections.
Innovation Solution
The design includes specific electrode configurations and extensions in the display device, such as extension portions on input electrodes and contact portions, to equalize capacitance between pixels and data lines, ensuring consistent signal transmission and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional pixel and data line configurations are used, then device structure is simple, but capacitance deviation between pixels and data lines occurs
Solution Approach 1:
The input electrode is designed with an extension portion that extends in a direction opposite to the data line extension direction. This asymmetric configuration creates a capacitance balancing effect where the extension portion's capacitance compensates for the capacitance difference between adjacent pixels and data lines, thereby reducing capacitance deviation without requiring complex symmetric structures.
Solution Approach 2:
The extension portion is selectively added only to the input electrode of the first pixel, creating a localized structural modification. This local quality change allows the system to compensate for capacitance deviation in specific regions without redesigning the entire electrode configuration, thus improving manufacturing precision while controlling device complexity.
2Manufacturing precision
If extension portions are added to input electrodes to reduce capacitance deviation, then capacitance uniformity improves, but electrode configuration complexity increases
Solution Approach 1:
The input electrode is designed with an extension portion that extends in a direction opposite to the data line extension direction. This asymmetric configuration creates a capacitance balancing effect where the extension portion's capacitance compensates for the capacitance difference between adjacent pixels and data lines, thereby reducing capacitance deviation without requiring complex symmetric structures.
Solution Approach 2:
The extension portion is selectively added only to the input electrode of the first pixel, creating a localized structural modification. This local quality change allows the system to compensate for capacitance deviation in specific regions without redesigning the entire electrode configuration, thus improving manufacturing precision while controlling device complexity.
3Speed
If data lines and pixel electrodes are positioned close together, then signal transmission is improved, but capacitance deviation increases
Solution Approach 1:
The input electrode is designed with an extension portion that extends in a direction opposite to the data line extension direction. This asymmetric configuration creates a capacitance balancing effect where the extension portion's capacitance compensates for the capacitance difference between adjacent pixels and data lines, thereby reducing capacitance deviation without requiring complex symmetric structures.
Solution Approach 2:
The extension portion acts as an intermediary element between the input electrode and the data line. By extending in the opposite direction, it creates a capacitive coupling that mediates the interaction between the input electrode and data line, thereby balancing the total capacitance while allowing close positioning for improved signal transmission.
Data Source
AI summary
A display device comprises a first pixel including a first transistor including a first control electrode, a first input electrode, and a first output electrode spaced apart from the first input electrode and a first pixel electrode connected to the first output electrode, a second pixel adjacent to the first pixel in a first direction and including a second transistor including a second control electrode, a second input electrode, and a second output electrode spaced apart from the second input electrode and a second pixel electrode connected to the second output electrode, and a scan line for providing a scan signal to the first and second control electrodes. The first and second input electrodes are disposed in a second direction intersecting the first direction from the first and second output electrodes, respectively, and the first input electrode includes a first extension portion extending toward the second output electrode.