Light Emitting Display Device Pixel Interference Reduction
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Solution Overview
Problem
Interference between adjacent pixels in light emitting display devices affects the display quality by disrupting the target voltage and luminance of light emitting diodes.
Innovation Solution
A light emitting display device design where a voltage line with a constant voltage is placed between the anode of one pixel and a connecting part directly connected to the gate electrode of an adjacent pixel, preventing interference and ensuring the gate electrode of the driving transistor is charged to a target voltage, thus maintaining target luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adjacent pixels are disposed close to each other to increase pixel density, then productivity and display resolution are improved, but interference between pixels occurs causing display quality degradation
Solution Approach 1:
A voltage line is introduced as an intermediary element positioned between the anode of one pixel and the connecting part of the gate electrode of an adjacent pixel. This voltage line acts as a mediator that prevents direct interference between adjacent pixels while allowing them to be disposed close together, thus maintaining high pixel density without compromising display quality
Solution Approach 2:
The patent segments the pixel structure by separating the anode and gate electrode connecting parts with a voltage line, creating distinct electrical zones. This segmentation prevents the interference that would occur if these elements were directly adjacent, allowing high-density pixel arrangement while maintaining signal integrity
2Device complexity
If the gate electrode is directly connected without intermediate structures to simplify the design, then device complexity is reduced, but interference between adjacent pixels disrupts the target voltage and luminance
Solution Approach 1:
The voltage line serves as a simple intermediary component that maintains target voltage stability without significantly increasing device complexity. It is positioned between interfering elements and provides electrical isolation while maintaining signal integrity, ensuring reliable voltage delivery to the gate electrode
Solution Approach 2:
The voltage line is disposed in a different spatial arrangement relative to the anode and gate electrode connecting parts, utilizing the planar layout to create separation. By positioning the voltage line between these elements in the planar view, the patent achieves interference prevention with minimal additional structural complexity
Data Source
AI summary
A light emitting display device includes: a first driving transistor; a first anode electrically connected to the first driving transistor; a first capacitor electrically connected to a gate electrode of the first driving transistor; a second driving transistor disposed to be adjacent to the first driving transistor; a second anode electrically connected to the second driving transistor; a second capacitor electrically connected to a gate electrode of the second driving transistor; a driving voltage line which applies a driving voltage to the first driving transistor and the second driving transistor; and a first connecting member electrically connecting the gate electrode of the first driving transistor and the first capacitor, where the driving voltage line is disposed between the first connecting member and the second anode in a plan view.