Liquid Crystal Display Pixel Circuit Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display devices have low viewing angle performance compared to other display devices, which is improved by enhancing side visibility through various drive systems like the S-PVA mode, but there is a need to increase aperture ratio for better light transmittance.
Innovation Solution
The display device includes a plurality of pixels with a first sub-pixel and a second sub-pixel, each connected to specific capacitors and a resistor, with a transistor connected to a gate and data line, and liquid crystal capacitors between pixel electrodes, optimizing the layout to increase the aperture ratio and light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the aperture ratio is increased to improve light transmittance, then the light transmittance is improved, but the space for arranging circuit components (transistor, capacitors, resistor) is reduced
Solution Approach 1:
The pixel is divided into two sub-pixels (first sub-pixel and second sub-pixel) with different circuit configurations. The first sub-pixel contains a transistor and first liquid crystal capacitor, while the second sub-pixel contains multiple capacitors and a resistor. This segmentation allows optimized space utilization in each sub-pixel region, enabling increased overall aperture ratio while maintaining necessary circuit functionality.
Solution Approach 2:
The circuit components are arranged in a multi-layered three-dimensional structure rather than a single planar layer. The transistor, capacitors, and resistor are positioned at different vertical levels and spatial locations within the non-pixel region, maximizing space utilization and enabling higher aperture ratio without compromising circuit integration.
2Ease of operation
If the S-PVA mode is used to improve side visibility, then the viewing angle performance is improved, but the gamma curve distortion occurs at intermediate gray levels
Solution Approach 1:
Different sub-pixels are assigned different circuit characteristics and voltage levels. The first sub-pixel and second sub-pixel have distinct capacitor configurations and resistance values, creating local variations in electrical properties. This allows each sub-pixel to contribute differently to the overall display output, compensating for gamma curve distortion while maintaining improved side visibility.
Solution Approach 2:
The patent modifies the electrical parameters (capacitance values, resistance values, voltage levels) of the circuit components in each sub-pixel to optimize performance. By adjusting these parameters, the system achieves both improved viewing angle characteristics and corrected gamma curve response at intermediate gray levels.
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, improving light transmittance and preventing side viewing angle degradation due to gamma curve distortion, thereby enhancing the visibility of the display device.
Implementation Method 1
a liquid crystal layer disposed between the first pixel electrode and the common electrode
Implementation Method 2
a first capacitor that is connected to the first liquid crystal capacitor, a second liquid crystal capacitor that is connected to the first capacitor
Implementation Method 3
a resistor that is connected to the first capacitor
Data Source
AI summary
A display device includes a plurality of pixels, and each of the plurality of pixels includes: a first sub-pixel including a transistor connected to a gate line and a data line that intersect with each other and are insulated from each other and a first liquid crystal capacitor connected to the transistor. A second sub-pixel includes a first capacitor that is connected to the first liquid crystal capacitor and a second liquid crystal capacitor that is connected to the first capacitor; a resistor that is connected to the first capacitor; and a second capacitor that is connected to the resistor.