Transflective TFT-LCD Pixel Electrode Layer Simplification
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Solution Overview
Problem
The manufacturing process of planar electric field type TFT-LCD array substrates is complex and costly, requiring five patterning processes.
Innovation Solution
A transflective thin film transistor array substrate is designed with a base substrate, first and second metal layers, and a first insulating layer, where the second pixel electrode of the reflective region and the first and second pixel electrodes of the transmissive region are provided in one pixel electrode layer, simplifying the process to four patterning steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If five separate patterning processes are used to form different electrodes, then each electrode can be precisely formed, but the manufacturing process becomes complicated and production cost increases
Solution Approach 1:
The patent combines the formation of multiple pixel electrodes (second pixel electrode of reflective region, first pixel electrode of transmissive region, and second pixel electrode of transmissive region) into a single pixel electrode layer that is formed in one patterning process. This merging of previously separate electrode formation steps into one unified process reduces manufacturing complexity while maintaining the precise formation of each electrode type through the single-layer design.
2Reliability
If five patterning processes are used to form all electrodes, then complete electrode structure is achieved, but production time and cost increase
Solution Approach 1:
The patent merges the formation of three different pixel electrodes into one single patterning process by designing them as a unified pixel electrode layer. This single process simultaneously forms all required pixel electrodes, maintaining complete electrode structure functionality while reducing the total number of patterning steps from five to one, thereby improving manufacturing efficiency and productivity.
Solution Approach 2:
The pixel electrode layer serves multiple functions simultaneously by forming the second pixel electrode of the reflective region, the first pixel electrode of the transmissive region, and the second pixel electrode of the transmissive region within a single layer structure. This multi-functional design allows one patterning process to achieve what previously required multiple separate processes, enhancing productivity without compromising structural completeness.
Data Source
AI summary
Embodiments of the disclosed technology provide a transflective transistor thin film array substrate and a method for manufacturing the same. The transflective thin film transistor array substrate, comprising pixel units defined by gate lines and data lines, and each pixel unit comprises a thin film transistor and a common electrode and is divided into a reflective region and a transmissive region. The reflective region comprises a reflective electrode and a second pixel electrode of the reflective region, the transmissive region comprises first and second pixel electrodes of the transmissive region, and the second pixel electrode of the reflective region and the first and second pixel electrodes of the transmissive region are provided in one pixel electrode layer.