LCD Pixel Electrode Structure for High Aperture Ratio Displays
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-definition liquid crystal display devices face challenges in achieving a high aperture ratio and low power consumption due to increased pixel density, which results in higher power consumption and reduced light transmission efficiency.
Innovation Solution
The design incorporates a light-transmitting conductive layer and insulating layers to eliminate steps caused by contact holes, reducing alignment defects and increasing the effective display area, along with a light-blocking layer to minimize light leakage, and a backlight system using mini or micro LEDs with quantum dot color conversion for efficient light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the pixel count per unit area is increased to achieve high-definition display, then the display resolution is improved, but the aperture ratio is decreased
Solution Approach 1:
The patent introduces a light-transmitting conductive layer that extends vertically from the pixel electrode through the alignment film into the liquid crystal layer. This three-dimensional structure allows the conductive layer to serve multiple functions: maintaining electrical conductivity while minimizing horizontal space occupation, thus preserving aperture ratio while enabling high-resolution display
2Measurement precision
If the pixel count per unit area is increased to achieve high-definition display, then the display resolution is improved, but the power consumption is increased
Solution Approach 1:
The patent changes the electrical parameters by introducing a light-transmitting conductive layer with optimized conductivity and thickness. This allows for reduced driving voltages and improved electrical efficiency, thereby reducing power consumption while maintaining high-resolution display capabilities
3Reliability
If a light-blocking layer is added to prevent light leakage, then the display contrast is improved, but the aperture ratio is further decreased
Solution Approach 1:
The patent applies light-blocking properties locally and selectively within the pixel structure. The light-transmitting conductive layer is positioned and dimensioned to provide necessary electrical function while minimizing interference with light transmission, achieving local optimization of both conductivity and optical properties
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 configuration enhances the aperture ratio, reduces power consumption, and provides a high-definition display with improved reliability and efficiency.
Implementation Method 1
a backlight system using mini or micro LEDs with quantum dot color conversion for efficient light emission
Data Source
AI summary
A display device with a high aperture ratio is provided. A step caused by a contact hole (50) for electrically connecting a wiring (33) and a pixel electrode (41) to each other is eliminated by being filled with an organic insulating layer (52), and a top surface of the pixel electrode is made flat to form an alignment film (45a) so that an alignment defect of a liquid crystal layer (40) is reduced. In addition, a light-transmitting material is used for the wiring (33) exposed to a bottom portion of the contact hole (50). Accordingly, an effective display region of a liquid crystal device can be increased. That is, the display device can have a high aperture ratio.