Transflective LCD Panel Second Common Electrode Layer
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Solution Overview
Problem
The manufacturing process of the upper substrate in transflective type liquid crystal display panels is complicated due to the need for different structures in the transmissive and reflective regions, requiring an additional mask plate.
Innovation Solution
Providing a second common electrode layer between the liquid crystal layer and the first substrate in both the transmissive and reflective regions, ensuring both regions have the same structure during manufacturing, thus eliminating the need for an additional mask plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different structures are provided for transmissive and reflective regions in the upper substrate, then the display can function in both transmissive and reflective modes, but the manufacturing process becomes complicated and requires additional mask plates
Solution Approach 1:
The upper substrate is segmented into transmissive regions and reflective regions through the patterned arrangement of transparent conductive oxide layers and reflective electrodes, allowing each region to have its specific electrode structure while maintaining a unified manufacturing process
Solution Approach 2:
The upper substrate structure is designed to serve multiple functions: it provides both transmissive and reflective display capabilities through a unified electrode layer configuration, eliminating the need for separate mask plates for different regions
2Adaptability or versatility
If different structures are provided for transmissive and reflective regions in the upper substrate, then the display can function in both transmissive and reflective modes, but the manufacturing process difficulty increases
Solution Approach 1:
The manufacturing processes for transmissive and reflective regions are merged into a single unified process by forming both types of electrode structures simultaneously in the upper substrate, eliminating the need for separate mask plate steps
Solution Approach 2:
The upper substrate electrode structures are prepared in advance with pre-defined transparent and reflective regions through a single fabrication process, so that no additional mask plates are needed during subsequent manufacturing steps
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Simplifies the manufacturing process of the upper substrate by standardizing the structure, reducing complexity and increasing efficiency.
Implementation Method 1
The initial orientation of the liquid crystal molecules in the transmissive region T is parallel to the transmissive axis of the lower polarizer 18, and the initial orientation of the liquid crystal molecules in the reflective region R forms an angle of 45 degrees with the transmissive axis of the lower polarizer 18
Implementation Method 2
the upper polarizer 11, the first substrate 12 and the first insulating layer 13 constitute an upper substrate S, and the pixel electrode layer 15, the second insulating layer 16, the second substrate 17 and the lower polarizer 18 constitute a lower substrate X. The transmissive axis of the upper polarizer 11 is perpendicular to the transmissive axis of the lower polarizer 18
Implementation Method 3
in a relatively bright environment, for example, in the sunshine, the reflective mode is mainly used, that is, mirrors within the liquid crystal display panel are used to reflect external light, which is used as a light source to display images
Data Source
AI summary
A transflective type liquid crystal display panel and a display using it are provided in order to solve the problem that there exists much difficulty in the making process of the upper substrate in the transflective type liquid crystal display panel. A second common electrode layer (201) is provided between an liquid crystal layer (24) and a first substrate (22) in a transmissive region (T) and a reflective region (R) in the display panel; the initial orientation of the liquid crystal molecules in the reflective region (R) forms an angle of 45 degrees with the transmissive axis of a lower polarizer (29); the initial orientation of the liquid crystal molecules in the transmissive region (T) is perpendicular to the first substrate (22) or a second substrate (202); a plurality of common electrodes (27) and a plurality of pixel electrodes (28) are provided on the surface of the second insulating layer (26) in the transmissive region (T) near the liquid crystal layer (24), and the common electrodes (27) and the pixel electrodes (28) are arranged with an interval therebetween.