Active Matrix Display Borderline Generation Using Zero Electric Field
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Solution Overview
Problem
Conventional active matrix driving display devices require additional driving circuits to display a borderline, which is inefficient and complicates the display process.
Innovation Solution
An active matrix driving display device with a liquid crystal display system that uses color filters on substrates to create a zero electric field in border areas, allowing light transmission and enabling the display of a borderline without additional driving circuits, utilizing dummy line and pixel data to generate control signals for displaying borderlines with specific colors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional driving circuits are added to display a borderline, then the borderline display capability is improved, but the device complexity increases
Solution Approach 1:
The existing driving circuits are made multi-functional by enabling them to display both regular image data and borderline data through a unified interface. The color filter layer is designed to work with standard liquid crystal cells to produce bordered displays without requiring separate dedicated borderline driving hardware, thus achieving versatility without increasing device complexity
Solution Approach 2:
The borderline display function is merged with the existing image display function. By integrating the color filter layer into the standard liquid crystal cell structure and using unified driving signals, the patent combines multiple functions (image display and borderline display) into a single system, eliminating the need for separate additional driving circuits
2Adaptability or versatility
If existing driving circuits are modified to display a borderline, then the borderline display capability is improved, but the ease of manufacture decreases
Solution Approach 1:
The display panel is segmented into different functional zones using the color filter layer - border areas with specific color filters and regular display areas without or with different color filters. This segmentation is achieved during the standard manufacturing process by selectively forming color filters in different regions, allowing borderline functionality to be added without modifying existing driving circuits or complicating the manufacturing process
Solution Approach 2:
Different regions of the display panel are given different local properties through selective color filter formation. Border regions receive specific color filters (e.g., red, green, blue) while regular display regions have standard color filters or no color filters. This local differentiation enables borderline display capability while maintaining compatibility with existing manufacturing processes
3Adaptability or versatility
If color filters are formed on the second substrate to display borderlines, then the borderline color control is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The color filter layer is formed with different local properties - specific color filters are deposited only in border region pixels while regular display region pixels have standard color filters or no color filters. This local quality differentiation provides precise borderline color control (red, green, blue, or combinations) while using standard thin-film deposition techniques that are already part of the manufacturing process, avoiding excessive precision requirements
Solution Approach 2:
The patent utilizes color filter formation to change the optical properties of border region pixels. By selectively forming red, green, or blue color filters in border areas, the display can show borderlines in various colors. This approach provides excellent borderline color control while relying onๆ็ thin-film fabrication techniques that do not impose excessive precision demands on the manufacturing process
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
Enables the display of borderlines with user-determined colors without altering existing driving circuits, providing a clear picture frame effect and resisting process failures, while being applicable to various flat panel display devices.
Implementation Method 1
a zero electric field being formed on the first liquid crystal layer so as to transmit all of a light incident into the first liquid crystal layer therethrough
Implementation Method 2
transmitting the second light through the first color filter layer to display a borderline in the first area, a color of the borderline depending on the color of the first color filter layer
Data Source
AI summary
LCD device includes two substrates, a first and second color filters, two liquid crystal layers. The first color filters are formed on portions of the second substrate corresponding to border area. The second color filters are formed on portions of the second substrate corresponding to the display area except the border area. A first liquid crystal layer between the first and the second substrate is comprised in border area, and a zero electric field is formed on the first liquid crystal layer so as to completely transmit light incident into the first liquid crystal layer therethrough. A borderline having various colors can be displayed by forming various patterns of color filters having various colors on portions of the second substrate corresponding to the border area under normally white mode, thereby producing picture frame effect while images are displayed on the screen.