LCD Panel 2T+8-Domain Sub-Pixel Aperture Ratio
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Solution Overview
Problem
Conventional LCD panels suffer from undesirable optical transmittance due to a low aperture ratio, which is exacerbated by the 3T8-domain and 3TPLUS8-domain pixel structures that attempt to alleviate color shift by varying liquid crystal molecule angles.
Innovation Solution
The LCD panel design incorporates a 2T+8-domain sub-pixel structure with a third capacitor connected in series between the TFT in the sub-area and the liquid crystal capacitor, reducing the voltage in the sub-area and increasing the aperture ratio, while maintaining different deflection angles for liquid crystal molecules to minimize color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a 3T8-domain or 3TPLUS8-domain pixel structure is used to alleviate color shift, then the color shift is reduced, but the aperture ratio decreases resulting in undesirable optical transmittance
Solution Approach 1:
The patent extracts the third TFT from the sub-area circuit configuration, removing the problematic component that caused horizontal crosstalk and reduced aperture ratio. By eliminating the third TFT while maintaining the 8-domain structure through capacitor design, the solution resolves the contradiction between color shift control and aperture ratio.
Solution Approach 2:
The patent changes the circuit parameters by modifying the capacitor connection configuration. Specifically, it connects the third capacitor between the second TFT drain and the second liquid crystal capacitor, altering the voltage distribution parameters to achieve different deflection angles without requiring the third TFT, thus improving aperture ratio while maintaining color shift control.
2Ease of manufacture
If multiple TFTs are used in sub-pixel structure to control liquid crystal deflection angles, then color shift is alleviated, but device complexity increases
Solution Approach 1:
The patent removes the third TFT from the sub-pixel structure, simplifying the device while maintaining the essential functionality. The extraction of this component reduces horizontal crosstalk and simplifies the overall pixel structure without compromising the ability to control liquid crystal deflection angles through the modified capacitor network.
Solution Approach 2:
The patent makes the capacitor network multi-functional by configuring the third capacitor to serve multiple purposes: it maintains the voltage difference needed for different deflection angles, eliminates horizontal crosstalk, and simplifies the overall circuit. This multi-functionality allows the structure to achieve viewing angle control with fewer components.
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 horizontal crosstalk, and effectively addresses color shift by creating distinct viewing angles without compromising optical transmittance.
Implementation Method 1
a liquid crystal layer is disposed between the color film base plate and the array base plate and includes a plurality of liquid crystal molecules
Implementation Method 2
different voltages are applied to the main area and the sub-area to incline liquid crystal molecules by different angles
Implementation Method 3
a third capacitor connected in series between the TFT in the sub-area and the liquid crystal capacitor, reducing the voltage in the sub-area
Data Source
AI summary
The present disclosure discloses a liquid crystal display (LCD) panel and a display device. Two thin film transistors (TFT) are disposed in a sub-pixel of the LCD panel. A quantity of the TFTs is reduced, and an aperture ratio of the pixel is increased. A third capacitor is connected in series between a TFT in a sub-area and a liquid crystal capacitor in the sub-area. A voltage of the sub-area declines with an increase in capacitors. Therefore, a deflection angle of liquid crystal molecules in a main area is greater than a deflection angle of liquid crystal molecules in the sub-area, forming different viewing angles. In this way, a color shift is resolved.