What are the advantages and disadvantages of LCD TV compared with ordinary CRT TV? Which kind of TV costs more electricity?
Author:hahan Time:2021-07-19 16:52 Browse(886)
Theoretically speaking, LCD TV has the advantages of light weight, power saving, no radiation, low heating, high definition, good expansion performance and complete interface. Compared with ordinary TV, it has a longer service life. However, the weakness of LCD TV is that it is extremely afraid of impact, even a slight impact may cause damage to TV
In theory, LCD TV has the advantages of light weight, power saving, no radiation, low heating, high definition, good expansion performance and complete interface. Compared with ordinary TV, it has a longer service life. However, the weakness of LCD TV is that it is extremely afraid of impact, even a slight impact may cause damage to TV.
CRT TV.

What are the advantages and disadvantages of LCD TV compared with ordinary CRT TV? Which kind of TV costs more electricity?

is bulky, and the interface is relatively low, Power consumption ~ ~ high price of large size ~ ~ no big performance improvement · phase out ~.
LCD.
commonly known as liquid crystal display in English.
LCD TV mainly adopts TFT type LCD panel.
its main components include fluorescent tube, light guide plate, polarizing plate, filter plate, glass substrate, alignment film, liquid crystal material Thin mode transistors and so on.
first, LCD must use backlight first.
that is, fluorescent tubes project light sources, which will first pass through a polarizing plate and then through the liquid crystal, At this time, the arrangement of liquid crystal molecules changes the angle of light passing through the liquid crystal.
then these light must pass through the front color filter film and another polarizing plate.
therefore, as long as the voltage value of stimulating liquid crystal is changed, the intensity and color of the last light can be controlled.
and then the color combinations with different shades can be changed on the liquid crystal panel.
in this way, the liquid crystal can be used as a light source Neither LCD nor plasma TV is cheap.
which one should I choose? Recently, our newspaper has received many calls from readers asking about the purchase of flat-panel TV.
their questions are surprisingly consistent: I want to buy a new TV.
should I buy a plasma TV or a liquid crystal TV? Industry insiders said that plasma and liquid crystal are the mainstream technologies of the next generation of TV sets, representing two different development directions.
in this paper, the development trend of plasma and liquid crystal is analyzedBoth kinds of flat panel TVs have their own advantages and disadvantages.
the plasma color TV has the characteristics of no flicker, thin thickness, light weight, bright color, realistic image, etc., and it is relatively easy to enlarge the screen. Its disadvantages are large power consumption, limited life and easy aging.
the LCD TV also has the advantages of no flicker, thin thickness, high reliability and so on And LCD has been widely used in the field of PC, but in the aspect of large screen, LCD technology lags behind plasma, and the cost of large screen color TV is high, Viewing is easily affected by viewing angle.
this newspaper asked relevant experts to compare plasma TV and LCD TV item by item.
we hope to give some advice to consumers.
size / price ratio: LCD and plasma TV are not cheap.
relatively speaking, Plasma TV has an advantage over LCD TV in unit price per square inch.
LCD TV has a smaller size.
generally, it is about 30 inches, and the price ranges from 9000 yuan to 15000 yuan. At present, the largest size in Nanjing market is 45 inches, but the price of nearly 70000 yuan is respectable; The size of plasma is large, and the smallest one is 42 inches. The price of domestic brands ranges from 15000 to 20000 yuan.
if you want the price of 50 inch LCD to be about the same as that of plasma, you need to wait patiently for a while.
a reader said.
to put a 20 inch sharp aquos in the bedroom.
experts remind.
the 20 inch TV is still quite small, You can't see what's on the screen until you sit close to it.
it's better to put it in the dining room or bathroom.
you can watch TV while eating or taking a bath.
similarly.
the 17 inch model is only suitable for kitchens or home offices.
performance: in terms of home theater effects.
The effect of plasma TV is better than that of LCD TV.
experts explained that LCD TV usually can't display the blackness of plasma TV.
therefore,
LCD TV is difficult to display more details, Video players will also feel that the "three-dimensional" sense of the image is not very good.
although the image quality of LCD and plasma TV has improved year by year in general,
the product performance of various manufacturers is far different, Therefore, before purchasing, we should go to the counters of various brands in the home appliance stores to compare in many ways.
Life / power consumption: LCD TVs have obvious advantages over plasma TVs in terms of service life.
although plasma TVs have different lifespan.
it takes about 20000 hours to reduce the brightness to half, However, LCD can be reduced to half brightness after 50000 hours.
LCD power consumption is only one third of that of plasma TV.
some plasma products consume more than 400 watts per hour.
Screen burning and altitude problems: "screen burning" is the problem of plasma TV.
If a still image is kept on the screen for a long time, If the TV station logo or news scroll bar is displayed above and below the TV for a long time.
or if you often watch standard format TV programs on the wide screen, shadow will appear on the side of the image on the top, bottom or both sides of the screen.
therefore, it is better to pay attention in use.
for example, do not play still images on the screen for a long time, In addition,
plasma TV may have problems in high altitude areas, because the air pressure difference at different altitudes will make plasma TV emit an unpleasant buzzing sound. Of course, there will be no high altitude problem in Nanjing.
LCD TV will not have the above two problems.
in addition, plasma TV may have problems in high altitude areasHigh definition: most plasma TVs and LCD TVs can display high-definition signals.
however, it should be noted that to enjoy a truly complete HDTV, the display resolution should be at least 1280 × 720.
only a few 42 inch plasma TVs can achieve this resolution.
most 50 inch plasma TVs and almost all LCD TVs larger than 26 inches have no problem.
of course.
a TV smaller than 42 inch is better than a real HDTV unless you sit in front of the screen and watch it carefully, Generally, we don't notice much difference between the two.
for example,
although Panasonic's th-42pa20u 42 inch plasma TV only provides enhanced definition resolution (EDTV, 852 × However, the effect of receiving HDTV with it is still very good.
computer and video games: most plasma TVs and LCD TVs can be used as computer monitors.
many TVs even provide DVI interface to achieve better display performance.
there is no problem with the two kinds of TV game consoles.
from the performance point of view alone.
it is difficult to make a ruling on the two technologies, However, considering the possibility of plasma TV screen burning, LCD TV is a relatively safe choice.
.
.
Related topics