Liquid Crystal Display Aperture Ratio via Storage Capacitor Extraction
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) face a reduction in aperture ratio due to the extension of storage lines across light-transmitting regions, which affects the alignment state and efficiency of liquid crystals.
Innovation Solution
The implementation of a liquid crystal display design where first and second storage capacitor lines are arranged parallel to the gate line, with storage capacitors formed in border areas between pixels, utilizing protruding portions and insulating materials to reduce the size of storage capacitors in light-transmitting regions, and a driving circuit that applies specific voltage sequences to these capacitors to enhance pixel aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If storage lines are extended to cross over light transmitting regions to connect storage capacitors, then storage capacitor functionality is achieved, but aperture ratio of pixels is deteriorated
Solution Approach 1:
The patent moves storage capacitors from the conventional planar arrangement within pixel boundaries to a three-dimensional configuration where capacitors are positioned in border areas between pixels and connected via storage lines extending in the vertical direction. This dimensional reorganization allows storage capacitors to occupy non-light-transmitting border regions, thereby preserving the aperture ratio of light-transmitting pixel areas while maintaining capacitor functionality.
Solution Approach 2:
The patent extracts storage capacitors from the light-transmitting pixel regions and relocates them to border areas between pixels. By separating the storage capacitor function from the light-transmitting pixel area, the invention eliminates the conflict between capacitor placement and aperture ratio requirements, allowing each to be optimized independently.
2Ease of manufacture
If storage capacitors are formed in light transmitting regions, then easier manufacturing is achieved, but display efficiency and aperture ratio are reduced
Solution Approach 1:
The patent utilizes the vertical dimension and border areas between pixels to position storage capacitors, transforming the conventional two-dimensional pixel structure into a three-dimensional arrangement. This allows storage capacitors to be formed using standard manufacturing processes while occupying spaces that do not interfere with light transmission, thereby maintaining ease of manufacture while improving display efficiency.
3Reliability
If storage lines cross over pixel regions to provide voltage to storage capacitors, then voltage distribution is achieved, but light transmitting area is reduced
Solution Approach 1:
The patent extracts storage lines from the light-transmitting pixel regions and relocates them to border areas where they can extend vertically to connect with storage capacitors. This separation ensures that voltage distribution functionality is maintained while light-transmitting areas remain unobstructed, resolving the contradiction between electrical connectivity and optical performance.
Data Source
AI summary
A liquid crystal display includes a pixel group including a first pixel having a first thin film transistor and a second pixel having a second thin film transistor. A gate line provides a driving signal to a gate of the first and second thin film transistors. A first storage capacitor line is arranged substantially parallel with the gate line and adjacent to one side of the first pixel. A second storage capacitor line is arranged substantially parallel with the gate line and adjacent to an opposite side of the first pixel. The liquid crystal display includes a first storage capacitor arranged in the first pixel and connected between the first thin film transistor and the first storage capacitor line. A second storage capacitor is arranged in the second pixel and is connected between the second thin film transistor and the second storage capacitor line.