Pixel Structure Protruding Insulating Layer for LC Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-resolution liquid crystal displays face challenges in maintaining normal signal presentation due to the impact of liquid crystal molecule arrangement by the pixel structure and topography, leading to disclination and light leakage.
Innovation Solution
A pixel structure comprising a bump formed of a light-shielding material, a first insulating layer, a semiconductive layer, a second insulating layer, a metal layer, and a planarization layer, where the first insulating layer protrudes over the bump, reducing height differences and topographical fluctuations, thereby minimizing the effect on liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution liquid crystal display is implemented, then resolution is improved, but liquid crystal molecules are more significantly affected by structure and topography causing disclination
Solution Approach 1:
The patent introduces an intermediary protruding portion from the first insulating layer that acts as a mediator between the bump structure and the liquid crystal molecules. This protruding portion fills the space above the bump, creating a gradual transition in height that reduces the abrupt topographical changes. The intermediary structure allows high-resolution display to be maintained while minimizing the harmful topography effects on liquid crystal molecule alignment.
Solution Approach 2:
The patent changes the topographical parameters of the pixel structure by adding a protruding portion that modifies the height profile. Instead of having a sharp bump structure, the protruding portion creates a gradual height transition, changing the topography parameters to reduce the impact on liquid crystal molecules while maintaining the structural integrity needed for high-resolution display.
2Reliability
If bump structure is added for electrical connection, then electrical connection is improved, but height difference and topographical fluctuations increase
Solution Approach 1:
The protruding portion of the first insulating layer serves as an intermediary element that bridges the height difference created by the bump structure. It provides a gradual transition zone that maintains electrical connection reliability through the bump while reducing the abrupt topographical fluctuations that would otherwise interfere with liquid crystal molecule alignment.
3Object-affected harmful factors
If first insulating layer protrudes over bump, then topographical fluctuations are reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the first insulating layer formation process with the bump structure creation process. The protruding portion is formed as an integrated part of the first insulating layer that covers the bump, combining multiple functions (insulation, topography management, and structural support) into a single manufacturing step, thereby reducing overall manufacturing complexity despite the added functional requirement.
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A pixel structure is disposed on a substrate and includes a bump, a first insulating layer, a semiconductive layer, a second insulating layer, a metal layer, and a pixel electrode. The bump is disposed on the substrate. The first insulating layer is disposed on the substrate and covers the bump. The first insulating layer has a protruding portion at the position at which the first insulating layer covers the bump. The semiconductive layer is disposed on the first insulating layer, and at least a portion of the semiconductive layer is disposed above the protruding portion. The second insulating layer is disposed on the first insulating layer and covers the semiconductive layer. The second insulating layer has a via, so as to make a portion of the semiconductive layer be not covered by the second insulating layer. The via corresponds to the protruding portion in a direction perpendicular to the substrate. The metal layer is electrically connected to the semiconductive layer through the via.