Integrated Pixel and Common Electrode Structure for Display Panel Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
It is challenging to manufacture a display panel that includes both pixel electrodes and a common electrode effectively.
Innovation Solution
A display panel structure is designed with a substrate, gate and data lines, gate insulating layer, semiconductor member, etch stopper layer, passivation layers, source and drain electrodes, a common electrode, and pixel electrodes, where the common electrode is separated from the source and drain electrodes, and the pixel electrode is connected to the drain electrode, along with a method of manufacturing involving sequential layer formation and etching to achieve this configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the display panel includes both pixel electrodes and common electrode in separate panels, then the manufacturing process is simpler, but the device complexity increases and productivity decreases
Solution Approach 1:
The patent merges the pixel electrode and common electrode into a single display panel structure. The pixel electrode is formed in the pixel region with ITO pattern, while the common electrode is formed in the non-pixel region with ITO pattern, both on the same substrate. This integration eliminates the need for separate panels, improving productivity while maintaining manufacturing feasibility through a unified fabrication process.
2Productivity
If the common electrode is integrated with source and drain electrodes on the same panel, then productivity improves, but the manufacturing precision and electrode separation control become more difficult
Solution Approach 1:
The patent segments the electrode formation process into distinct regions: the pixel electrode is formed in the pixel region through specific photolithography patterning, while the common electrode is formed in the non-pixel region. The etch stop layer and passivation layers are strategically positioned to maintain precise separation between these electrode regions, ensuring manufacturing precision despite integration on the same panel.
Solution Approach 2:
The patent introduces intermediate layers including an etch stop layer and passivation layers between the pixel electrode and common electrode regions. These intermediary layers facilitate precise pattern transfer and electrode separation during manufacturing, enabling accurate positioning and separation control while maintaining the integrated panel structure.
3Adaptability or versatility
If multiple layers and electrodes are integrated in the same panel, then device functionality is enhanced, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent implements a multi-functional electrode structure where the ITO-based pixel electrode and common electrode coexist on the same panel, enabling both pixel-level control and common electrode functionality for liquid crystal alignment. The gate electrode, source electrode, and drain electrode are integrated with the same material system, creating a universal fabrication approach that enhances functionality while managing complexity through material consistency.
Data Source
AI summary
A display device includes: a gate electrode, a gate line, and data lines on a substrate, the data lines in a same layer as the gate line; a gate insulating layer on the gate line; a semiconductor member on the gate insulating layer; an etch stopper layer on the semiconductor member and the gate insulating layer; a first passivation layer on the etch stopper layer; a source electrode on the first passivation layer and the etch stopper layer and connected to the data lines; a drain electrode on the etch stopper layer; a common electrode on the first passivation layer and separated from the source electrode and the drain electrode; a second passivation layer on the source electrode, the drain electrode and the common electrode; and a pixel electrode on the second passivation layer and connected to the drain electrode.