Pixel Structure with Conductive Light-Shielding Layer Storage Capacitor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The conventional array on color filter (AOC) substrate design for LCDs faces challenges in improving the aperture ratio due to the space taken up by the common electrode, which is used to form a storage capacitor, limiting the efficiency of the display panel.
Innovation Solution
A pixel structure is designed where a conductive light-shielding layer is placed at the periphery of the pixel region, overlapping with the pixel electrode to form a storage capacitor, thereby replacing the common electrode and enhancing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common electrode is used to form a storage capacitor within the pixel region, then the storage capacitance is achieved, but the aperture ratio is reduced due to the space occupied by the common electrode
Solution Approach 1:
The patent moves the storage capacitor formation from the planar pixel region to the vertical periphery region. The conductive light-shielding layer is positioned at the periphery of the pixel region, overlapping with the pixel electrode in the vertical dimension to form the storage capacitor. This dimensional transition allows the capacitor to occupy space outside the pixel region, thereby improving the aperture ratio while maintaining storage capacitance.
Solution Approach 2:
The conductive light-shielding layer serves multiple functions: it acts as a black matrix to block light, provides electrical connection, and forms the storage capacitor with the pixel electrode. By integrating these functions into a single component located at the periphery, the patent eliminates the need for a separate common electrode within the pixel region, thus improving the aperture ratio.
2Area of stationary object
If the conductive light-shielding layer is positioned at the periphery of the pixel region to form a storage capacitor, then the aperture ratio is improved, but the electrical connection complexity increases
Solution Approach 1:
The patent combines the light-shielding function and the storage capacitor function into a single conductive light-shielding layer structure. This merging eliminates the need for separate common electrode and capacitor structures, reducing overall device complexity despite the peripheral positioning. The unified structure simplifies the electrical connection architecture while achieving both light blocking and capacitance storage.
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 improves the aperture ratio by utilizing the conductive light-shielding layer as both a black matrix and a storage capacitor, allowing for greater storage capacitance and better electrical performance compared to conventional designs.
Implementation Method 1
an overlapping area between the pixel electrode and the conductive light-shielding layer constitutes a storage capacitor
Data Source
AI summary
A pixel structure including a substrate, a color filter layer, a conductive light-shielding layer, a buffer layer, a scan line, a data line, an active device, and a pixel electrode is provided. The substrate has a pixel region. The color filter layer is disposed corresponding to the pixel region. The conductive light-shielding layer is disposed corresponding to the periphery of the pixel region. The buffer layer covers the conductive light-shielding layer and color filter layer. The scan line and the data line are disposed on the buffer layer. The active device is disposed on the buffer layer and electrically connected to the scan line and data line. The pixel electrode is disposed on the buffer layer and electrically connected to the active device, wherein an overlapping area between the pixel electrode and the conductive light-shielding layer constitutes a storage capacitor. A method for manufacturing the pixel structure is also provided.