Wide Viewing Angle Display Technology
Wide viewing angle technology introduction
Multi-domain Vertical Alignment, Fujitsu, Chimei, AUO:
For MVA (Multi-domain Vertical Alignment) mode LCDs, the long axis of the liquid crystal molecules is not parallel to the screen like the TN mode when not powered, but perpendicular to the screen, and each pixel is composed of multiple vertically oriented liquid crystal molecule domains.
When voltage is applied to the liquid crystal, the liquid crystal molecules tilt in different directions. In this way, the screen can be compensated in the corresponding direction when viewed from different angles, which improves the viewing angle.
IPS wide viewing angle
In-Plane Switching, Hitachi, LG Philips.
Like MVA wide viewing angle technology, IPS (In Plane Switching) mode wide viewing angle technology also focuses on the long axis orientation of liquid crystal molecules. The difference is that the liquid crystal display using IPS wide viewing angle technology allows the observer to only see the short axis of the liquid crystal molecules at any time, so the picture viewed from different angles will not be too different, which perfectly improves the viewing angle of the LCD.
PVA wide viewing angle
Patterned Vertical Alignment, Samsung Electronics.
OCB wide viewing angle
Optical Compensated Birefringence, Panasonic, Japan.
OCB (Optically Compensated Bend/Optical Compensated Birefringence) wide viewing angle technology. uses its cleverly designed liquid crystal molecular arrangement to achieve self-compensation viewing angle. so it is also called self-compensation mode.
Under the compensation of self-compensation and biaxial optical film, OCB mode liquid crystal can achieve a good viewing angle, and the viewing angle uniformity is very good. As shown in the figure, the grayscale reversal phenomenon inherent in the TN mode will not occur in different directions.
FFS wide viewing angle
Fringe Field Switching, Hyundai, South Korea, BOE.
Just like the relationship between PVA mode and MVA mode, FFS (Fringe Field Switching) should strictly be a branch of IPS mode. The main improvement is the use of transparent electrodes to increase light transmittance. Compared with the already perfect IPS mode. FFS can be said to be “going one step further”.
The first generation of FFS technology mainly solves the problem of low light transmittance caused by the inherent low aperture ratio of the IPS mode and reduces power consumption. The second generation of FFS technology (Ultra FFS) improves the FFS color shift phenomenon and shortens the response time. The third generation of FFS technology (Advanced FFS) has significantly improved light transmittance, contrast, brightness, viewing angle, and color difference.
ASV wide viewing angle
Advanced Super View, Japan Sharp (CPA).
夏普CPA（Continuous PineWheel Alignment）技术即“连续火焰状排列技术”。
额外视角宽视角日本NEC。
广视角技术比较
