Pixel Structure Contact Pattern Layer for HD Display
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Solution Overview
Problem
In high-definition liquid crystal displays, the small size of sub-pixels increases process difficulty for contact windows between pixel electrodes and drain electrodes, leading to unsuccessful electrical connections and deteriorated display quality.
Innovation Solution
A pixel structure where a contact pattern layer is shared between two adjacent sub-pixels, using patterned transparent conductive layers to extend and electrically connect the drain electrode, thereby overcoming process limitations and ensuring successful electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of sub-pixel is reduced to achieve high definition, then the pixel density is improved, but the process difficulty of contact window increases
Solution Approach 1:
The patent transitions from a planar contact window structure to a three-dimensional structure by adding a contact pattern layer above the drain electrode. This vertical dimension allows the contact pattern layer to extend over the color filter pattern layer and connect to the pixel electrode, effectively increasing the contact area and making the electrical connection process more feasible despite reduced sub-pixel sizes.
Solution Approach 2:
The contact pattern layer is designed to cover at least part of two adjacent switch devices, merging the contact structure across sub-pixel boundaries. This shared contact pattern layer approach simplifies the manufacturing process by reducing the number of separate contact windows needed while maintaining electrical connectivity for high-definition displays.
2Area of moving object
If the size of contact window is reduced below process limitation, then the sub-pixel size is improved, but the electrical connection fails
Solution Approach 1:
The patent resolves the contradiction between small contact window size and reliable electrical connection by moving the contact structure to a higher dimension. The contact pattern layer is formed above the color filter pattern layer, creating a vertical extension that increases the effective contact area and ensures reliable electrical connection between the drain electrode and pixel electrode even when the horizontal contact window dimensions are reduced below traditional process limitations.
Solution Approach 2:
The contact pattern layer acts as an intermediary structure that bridges the drain electrode and the pixel electrode. This intermediate layer provides a reliable electrical connection path, ensuring that even when the direct contact window between drain electrode and pixel electrode is minimized, the electrical connection remains intact through the mediating contact pattern layer.
3Productivity
If the contact window size is below process limitation, then the sub-pixel integration is improved, but the display quality deteriorates
Solution Approach 1:
The patent achieves high sub-pixel integration with maintained display quality by extending the contact structure vertically. The contact pattern layer rises above the color filter pattern layer, creating a three-dimensional contact structure that allows for highly integrated sub-pixels with minimal horizontal contact window dimensions while ensuring reliable electrical connection for proper liquid crystal driving and display quality.
Solution Approach 2:
The contact pattern layer is designed to be shared between adjacent sub-pixels, merging the contact structure across multiple sub-pixel boundaries. This approach enables high sub-pixel integration density while maintaining reliable electrical connections for each sub-pixel, thereby preserving display quality despite the high level of integration.
Data Source
AI summary
A pixel structure including scan lines, data lines, and sub-pixels is provided. The scan and data lines are disposed on the substrate. The sub-pixels include switch devices, contact pattern layer, color filter pattern layers, and pixel electrodes. The switch devices are electrically connected to one scan line and one data line respectively. The contact pattern layer and the color filter pattern layer are disposed on the substrate and the switch devices. The contact pattern layer covers part of two adjacent switch devices. At least two color filter pattern layers include a patterned opening respectively, and the contact pattern layer is disposed in the patterned opening. The pixel electrodes are disposed on the color filter pattern layer, the contact pattern layer, and the switch device. At least one pixel electrode is partially disposed between the color filter pattern layer and the corresponding switch device while electrically connected to the switch device.