What is the meaning of LCD panel type? What are the types? Which is better?
Author:Zhu Weijun Time:2021-08-05 09:14 Browse(718)
The quality of a LCD depends on its panel first, because the quality of the panel directly affects the viewing effect of the picture, and the LCD TV panel accounts for more than half of the cost of the whole machine, which is the main factor affecting the cost of the LCD TV, so to choose a good LCD, we must first choose its panel. LCD panel can largely determine the brightness, contrast, color, visual angle and other very important parameters of LCD. The speed of the development of LCD panel is very fast, from the previous three generations, the rapid development to the fourth and fifth generations, and then skip six generations to seven generations, and the updated eighth generation panel is also seeking/
The quality of a LCD depends on its panel first, because the quality of the panel directly affects the viewing effect of the picture, and the LCD TV panel accounts for more than half of the total cost of the whole machine, which is the main factor affecting the cost of the LCD TV, so we should choose a good LCD, First of all, choose the right panel.

What is the meaning of LCD panel type? What are the types? Which is better?

LCD panel can largely determine the brightness, contrast, color, visual angle and other very important parameters of LCD.
the development of LCD panel is very fast.
from the previous three generations, it has developed rapidly to the fourth and fifth generations, and then skip the sixth generation to the seventh generation, At present, the main manufacturers of LCD panel are Samsung, LG Philips, Youda, etc.
due to the differences in the technical level of each company, the LCD panel can be roughly divided into different types.
the common ones are TN panel, MVA, PVA and other VA panel, IPS panel and CPA panel.
.
.
1 TN panel.
.
TN panel is called twisted nematic panel.
low production cost makes TN become the most widely used entry-level LCD panel, which is widely used in the mainstream low-end liquid crystal displays on the market.
at present, most of the TN panels we see are improved TN + film.
film is compensation film, which is used to make up for the deficiency of TN panel viewing angle, At present, the visual angle of the improved TN panel is up to 160 °, Of course, this is the limit value measured by the manufacturer when the contrast ratio is 10:1. In fact, when the contrast ratio drops to 100:1, the image has appeared distortion or even color deviation.
.
.
as a 6bit panel.
TN panel can only display 64 colors of red, green and blue, and the maximum actual color is only 262.144. Through the "dithering" technology, it can obtain more than 16 million kinds of color performance ability, and can only display three primary colors from 0 to 252 gray scale, so the final color display number information is 16.2 m color, rather than what we usually call true color 16.7 m color; In addition, it is difficult to improve the contrast of TN panel, which directly exposes the problems of thin color, poor reduction ability and unnatural transition.
.
.
the advantage of TN panel is that the number of output gray classes is small.
the liquid crystal molecule deflection speed is fast, and the response time is easy to improve, In addition, Samsung has developed a b-tn (best TN) panel.
it is actually an improved TN panel, In order to balance the high-speed response of TN panel, it is necessary to sacrifice the contradiction of image quality.
at the same time, the contrast can reach 700 ∶ 1.
it can be close to the panel of MVA or early PVA.
many panel manufacturers in Taiwan produce TN panel.
TN panel belongs to soft screen, and similar watermarks will appear when you swipe with your hand. In addition, when you look at the screen carefully, it is like this:
.
2 VA panel.
.
VA panel is the most widely used panel type of high-end LCD.
it belongs to wide view panel.
compared with TN panel.
8bit panel can provide 16.7M color and large viewing angle, which is the high-end capital of this kind of panel, But the price is more expensive than that of TN panel.
VA panel can be divided into MVA panel dominated by Fujitsu and PVA panel developed by SamsungBut the uniformity of the screen is not good enough, Color drift often occurs.
sharp text is its trump card.
black and white contrast is quite high.
.
.
Fujitsu's MVA technology can be said to be the first wide view LCD panel technology.
this kind of panel can provide a larger viewing angle.
it can usually reach 170 °.<
through technology authorization.
Qimei Electronics (Qijing Optoelectronics), Youda optoelectronics and other panel enterprises in Taiwan Province have adopted this panel technology.
the improved p-mva panel visual angle can reach close to 178% °..
Samsung's PVA (patterned vertical alignment) technology also belongs to the category of VA technology.
it is the successor and developer of MVA technology.
its comprehensive quality has surpassed the latter.
and the improved S-PVA can keep pace with p-mva, A wide viewing angle and faster response time are obtained.
PVA adopts transparent ITO electrode instead of the liquid crystal layer bump in MVA.
transparent electrode can obtain better opening ratio, This mode greatly reduces the possibility of "bright spot" on LCD panel.
in the era of LCD TV, the status is equivalent to "long tube" in the era of kinescope TVSamsung's PVA mode wide view technology is widely used by Japanese and American manufacturers due to its powerful production capacity and stable quality control system.
at present, PVA technology is widely used in medium and high-end LCD or LCD TV.
VA panel also belongs to soft screen.
swiping with your hand will cause similar water marks. When you look at the screen carefully, it is roughly like this:
.
3 IPS panel.
.
IPS (in plane switching.
is a liquid crystal panel technology launched by Hitachi in 2001, commonly known as "super TFT."
the IPS camp is led by Hitachi.
a group of manufacturers such as LG Philips, Hanyu Caijing, idtech (joint venture company of Chimei electronics and IBM in Japan) are gathered, However, there are not many models available in the market.
the biggest feature of IPS panel is that its two poles are on the same plane.
unlike other liquid crystal models, the electrodes are arranged on the upper and lower sides in a three-dimensional manner.
because the electrodes are on the same plane.
no matter what state, the liquid crystal molecules are always parallel to the screen, which will reduce the opening rate and light transmittance, So IPS application in LCD TV will need more backlight.
in addition, there is a kind of S-IPS panel, which is an improved type of IPS.
.
the advantages of IPS panel are high viewing angle, fast response speed.
accurate color restoration and low price.
however, the disadvantage is that the light leakage problem is serious.
the black purity is not enough, which is slightly worse than PVA, Therefore, it is necessary to rely on the compensation of optical film to achieve better black.
at present, IPS panels are mainly produced by LG Philips.
compared with other types of panelsThe screen of IPS panel is relatively "hard", and it is not easy to appear water pattern deformation when you stroke it with your hand, so it is also known as hard screen.
when you look at the screen carefully.
if you see a fish scale pixel facing left, plus the hard screen, you can confirm that it is IPS panel.
.
.
4 CPA panel (ASV panel).
.
CPA (continuous pinwheel alignment.
continuous fireworks arrangement) mode wide view technology (soft screen), CPA mode wide view technology is strictly a member of VA camp, The liquid crystal molecules radiate toward the central electrode in the form of fireworks.
because the electric field on the pixel electrode is continuously changing.
this wide view mode is called "continuous fireworks arrangement mode.
and CPA is promoted by sharp, the father of liquid crystal.
it should be noted that the ASV that sharp always publicizes is not a specific wide view technology, In fact, only CPA mode is sharp's own wide view technology.
the products of this mode are basically the same as those of MVA and PVA.
that is to say.
Sharp's LCD TV does not necessarily use sharp's own CPA mode LCD panel, It may use the VA panel of Taiwan manufacturer or the LCD panel of other manufacturers.
Sharp's CPA panel has true color restoration, excellent visual angle and delicate image.
the price is relatively expensive, and sharp rarely sells CPA panel to other manufacturers.
CPA panel is also a soft screen.
if you gently scratch it with your hand, similar water marks will appear,If you look at the screen carefully, it's like this:
.
in addition, some other manufacturers also have their own LCD panel technologies.
for example, NEC's extraview technology, Panasonic's OCB technology, modern FFS technology, etc. these technologies are improvements on the old TFT panel, providing visibility and response time, Generally, they are only used in LCD displays or LCD TVs of their own brands.
in fact, all the above panels belong to TFT panels.
but now all kinds of panels have their own technology and names, so the name TFT is not often used.
.
.
there are no absolutely good or absolutely bad things in the world.
only relatively speaking, Choose according to everyone's needs
Related topics