LCD Electrode Layout for Wide Viewing Angle and Fewer Masks
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional semiconductor and liquid crystal display devices require complex manufacturing processes and high costs due to the need for etching and multiple masks to form light-transmitting conductive films for pixel and common electrodes, which increases the number of manufacturing steps and reduces viewing angle capabilities.
Innovation Solution
A semiconductor device and liquid crystal display device design where a light-transmitting conductive film is used as one of the electrodes without processing, reducing the number of manufacturing steps and masks, and allowing for a wide viewing angle by generating an electric field parallel to the substrate to control liquid crystal molecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light-transmitting conductive film is processed by etching to form pixel and common electrodes, then the electrodes can be formed with precise patterns, but the number of manufacturing steps and masks increases
Solution Approach 1:
The patent extracts the electrode formation step from the conventional etching process. Instead of forming electrodes by etching patterns into a continuous conductive film, the invention uses a conductive film that is deposited only in the desired electrode regions from the beginning, eliminating the need for etching and mask processes while maintaining precise electrode patterns.
Solution Approach 2:
The conductive film is deposited in advance in the specific electrode regions before other manufacturing steps. This preliminary action of forming electrodes directly in their final positions during the deposition process eliminates subsequent etching steps and reduces overall manufacturing complexity.
2Manufacturing precision
If conventional etching processes are used to form electrodes, then precise electrode patterns are achieved, but manufacturing cost increases
Solution Approach 1:
The patent removes the etching and mask processes from the manufacturing sequence by using selective deposition. The conductive film is deposited only where electrodes are needed, eliminating costly etching operations while maintaining precise electrode patterns, thereby reducing manufacturing cost.
3Reliability
If electric field is generated perpendicular to substrate, then liquid crystal molecules are controlled vertically, but viewing angle is limited
Solution Approach 1:
The patent transitions from vertical electric field control to horizontal electric field control by arranging conductive films in the same plane. This dimensional change from perpendicular to parallel electric field generation enables liquid crystal molecules to be controlled in the horizontal direction, providing wide viewing angle while maintaining reliable liquid crystal control.
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
This approach simplifies the manufacturing process, reduces costs, and maintains a wide viewing angle while ensuring reliable liquid crystal control, resulting in a more efficient and cost-effective semiconductor and liquid crystal display device.
Implementation Method 1
a light-transmitting conductive film is used as one of the electrodes without processing, reducing the number of manufacturing steps and masks, and allowing for a wide viewing angle by generating an electric field parallel to the substrate to control liquid crystal molecules
Data Source
AI summary
To provide a semiconductor device, a liquid crystal display device, and an electronic device which have a wide viewing angle and in which the number of manufacturing steps, the number of masks, and manufacturing cost are reduced compared with a conventional one. The liquid crystal display device includes a first electrode formed over an entire surface of one side of a substrate; a first insulating film formed over the first electrode; a thin film transistor formed over the first insulating film; a second insulating film formed over the thin film transistor; a second electrode formed over the second insulating film and having a plurality of openings; and a liquid crystal over the second electrode. The liquid crystal is controlled by an electric field between the first electrode and the second electrode.