Which kind of LCD TV screen is good?
Author:Chai Ligang Time:2021-07-19 17:59 Browse(540)
The quality of a LCD first depends on its panel, 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 LCD TV. Therefore, to choose a good LCD display, we must first choose its panel. LCD panel can largely determine the brightness, contrast, color, visual angle and other very important parameters of LCD. LCD panel is developing very fast, from three generations to four, five generations, then skip six generations to seven generations, and the eighth generation panel is also under planning/
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.
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.

Which kind of LCD TV screen is good?

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 panels are Samsung, LG Philips, Youda, etc.
due to the differences in the technical level of each company, the LCD panels produced are also roughly divided into different types of models.
the common ones are TN panel, MVA panel, PVA panel and other VA panels IPS panel and CPA panel.
.
TN panel.
the full name of TN panel is 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 LCD in the market.
at present, most of the TN panels we see are improved TN + film.
film is compensation film, To make up for the lack of TN panel viewing angle, the improved TN panel viewing angle 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,There are only 262.144 kinds of actual colors. Through the "dithering" technology, it can obtain more than 16 million kinds of color performance, and can only display three primary colors from 0 to 252 gray scale. Therefore, the final color display number information is 16.2 m color, not 16.7 m color as we usually call true 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, the contradiction of image quality must be sacrificed.
at the same time, the contrast can reach 700 ∶ 1.
it can be close to that of MVA or early PVA panel.
many panel manufacturers in Taiwan produce TN panel.
TN panel belongs to soft screen, The VA panel is one of the most widely used high-end LCD panel types.
it belongs to the wide viewing angle panel.
compared with the TN panel.
the 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 Fujitsu led MVA panel and Samsung developed PVA panel.
the latter is the inheritance and improvement of the former.
VA panel has the highest positive (facing up) contrast.
VA panel has the highest positive (facing up) contrastBut the uniformity of the screen is not good enough, and color drift often occurs.
sharp text is its trump card.
black and white contrast is quite high.
.
.
IPS panel.
the advantages of IPS panel are high viewing angle, fast response speed.
color restoration is accurate, and the price is cheap.
however, the disadvantage is that light leakage is serious.
black purity is not enough, which is slightly worse than PVA, At present, the IPS panel is mainly produced by LG Philips.
compared with other types of panels.
the screen of IPS panel is relatively "hard", and it is not easy to appear water grain deformation when you swipe it with your hand, so it is also known as hard screen.
when you look at the screen carefully.
if you see fish scale pixels facing left, add hard screen, Then it can be identified as IPS panel.
.
.
CPA panel (ASV panel).
CPA (continuous pinwheel alignment.
continuous fireworks arrangement) mode wide view technology (soft screen). CPA mode wide view technology strictly belongs to 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 the CPA model is sharp's own wide view technology.
in this article, we will discuss the application of the wide view technology of TN + film, VA and CPAThe products in this mode are basically the same as those in MVA and PVA.
that is to say,
Sharp's LCD TV may not use the CPA mode LCD panel produced by sharp itself, it may use the VA mode panel of Taiwan manufacturers 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, In addition, sharp rarely sells CPA panels to other manufacturers.
CPA panels are also soft screens.
when you swipe with your hand, similar water lines will appear. When 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 all improvements to the old TFT panel, providing visual angle and response time, and are usually only used on the LCD or LCD TV of its own brand.
in fact, these panels are all TFT panels.
but now various panels have their own technologies and names, So the name TFT is not often used.
.
1. 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, which is the main factor affecting the cost of LCD TV, so we should choose a good LCD, First of all, choose the right panel.
.
2. 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 panels are Samsung, LG Philips, Youda, etc.
due to the differences in the technical level of each company, the LCD panels can be roughly divided into different types.
the common ones are TN panel, MVA panel, PVA panel, IPS panel and CPA panel.
.
.
Related topics