In-Cell Touch LCD Pixel Electrode Top Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-cell touch LCD apparatuses with common electrode top pixel structures have complex manufacturing processes, high costs, and suffer from color mixing between red, green, and blue pixels due to high light transmittance at pixel boundaries.
Innovation Solution
The implementation of a pixel electrode top structure in the in-cell touch LCD apparatus, where a thin film transistor (TFT) is formed in each pixel area with specific passivation layers and conductive lines, reducing the number of masks required in the manufacturing process and preventing color mixing by optimizing light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a common electrode top pixel structure is used in in-cell touch LCD, then the touch function is integrated into the liquid crystal panel, but color mixing occurs between red, green, and blue pixels due to high light transmittance at pixel boundaries
Solution Approach 1:
The patent applies different light transmittance characteristics to different regions of the pixel structure. The pixel electrode top structure creates high light transmittance in the central pixel area for good display quality, while the data line area structure reduces light transmittance to prevent color mixing. This local differentiation of optical properties solves the color mixing problem without sacrificing touch functionality.
2Adaptability or versatility
If an in-cell touch LCD apparatus with common electrode top structure is manufactured, then touch capability is achieved, but the manufacturing process becomes complex and costly
Solution Approach 1:
The patent merges the pixel electrode structure with the touch electrode structure in an in-cell configuration. The pixel electrode top structure serves dual purposes: it functions as both the display pixel electrode and the touch sensing electrode. This integration eliminates the need for separate touch electrode layers and reduces the total number of manufacturing masks from eleven to ten, thereby simplifying the manufacturing process while maintaining touch capability.
3Reliability
If eleven masks are used in the manufacturing process of in-cell touch LCD, then complete functional layers are formed, but manufacturing time and cost increase
Solution Approach 1:
The patent combines certain manufacturing steps by using a unified pixel electrode top structure that serves both display and touch functions. This merging of functions allows the removal of one mask step (reducing from eleven to ten masks) while still forming all necessary functional layers. The integrated structure ensures that the pixel electrode and touch electrode are formed simultaneously, maintaining functional completeness while improving manufacturing efficiency.
Data Source
AI summary
Disclosed are an in-cell touch liquid crystal display (LCD) apparatus having a pixel electrode top structure and a method of manufacturing the same. The in-cell touch LCD apparatus is implemented in the pixel electrode top structure, thereby preventing color mixing between red, green, and blue pixels. The method of manufacturing the in-cell touch LCD apparatus decreases the number of masks necessary to manufacture a TFT array substrate, thereby reducing a manufacturing time and the manufacturing cost.