TFT Substrate Pixel Design for Large Viewing Angle
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Solution Overview
Problem
Conventional liquid crystal panels experience color shift and reduced transmission rates when the viewing angle is large, leading to increased power consumption and energy waste due to the need for higher backlight module power to maintain transmission rates.
Innovation Solution
A TFT substrate design with pixel cells having at least one single sub-pixel area and two isolated sub-pixel areas, where the brightness of the main pixel area is greater than the secondary pixel area, and the voltage reduction component, such as a transistor or coupling capacitor, reduces the voltage of the secondary pixel area, maintaining high transmission rates while minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the secondary pixel area is configured to be larger (around 60% of aperture area) to enhance large-viewing-angle performance, then the viewing angle performance is improved, but the transmission rate of the overall secondary pixel cell is reduced
Solution Approach 1:
The patent applies local quality by making only one or two specific sub-pixels within a pixel cell contain two areas (main and secondary), while other sub-pixels remain as single area. This selective application enhances large-viewing-angle performance in specific regions without compromising the overall transmission rate of the pixel cell.
2Productivity
If the transmission rate is increased to maintain higher brightness, then the transmission rate is improved, but the power consumption of the backlight module has to be increased
Solution Approach 1:
By applying the two-area structure only to one or two sub-pixels rather than all sub-pixels, the patent achieves the necessary transmission rate improvement locally without requiring a uniform increase across the entire display, thus avoiding proportional increases in backlight power consumption.
3Adaptability or versatility
If all sub-pixels include two areas to enhance large-viewing-angle performance, then the viewing angle performance is improved, but the aperture rate is reduced
Solution Approach 1:
The patent selectively applies the two-area configuration to only one or two sub-pixels within each pixel cell, preserving the aperture rate by maintaining single-area configurations in other sub-pixels, thus achieving large-viewing-angle performance enhancement without sacrificing overall aperture efficiency.
4Stability of the object's composition
If the brightness of the secondary pixel area is increased to match the main pixel area, then the uniformity is improved, but the power consumption is increased
Solution Approach 1:
The patent introduces a voltage reduction component that modifies the voltage parameter supplied to the secondary pixel area, creating a controlled brightness difference between main and secondary areas. This parameter change allows the system to achieve acceptable visual performance while reducing power consumption compared to uniform high-brightness configurations.
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
Enhances large-viewing-angle performance of liquid crystal panels by maintaining high transmission rates and reducing power consumption of the backlight module, thereby saving energy.
Implementation Method 1
the voltage of the secondary pixel electrodes is reduced by the voltage reduction component, and the voltage of the main pixel electrode is greater than the voltage of the secondary pixel electrode such that the brightness of the main pixel area is greater than the brightness of the secondary pixel area
Data Source
AI summary
In the present disclosure, one TFT substrate and a liquid crystal panel are disclosed. The TFT substrate includes a plurality of pixel cells, and each of the pixel cells includes three sub-pixel cells. Within one pixel cell, at least one sub-pixel includes single pixel area. Each of the other pixel cells includes two isolated pixel areas, and brightness of the at least two isolated pixel areas being different. In view of the above, the performance of the liquid crystal panel is enhanced when the viewing angle is large. In addition, the transmission rate of the liquid crystal panel may be maintained to be higher, which saves the power consumption of the backlight module so as to save the energy.