What are the main aspects of a good LCD TV?
Author:pocket knife Time:2021-07-20 11:23 Browse(603)
The screen has no bad points, whether the color of the screen is true, whether the brightness is too dazzling, and whether there is light leakage on the screen.
There are no bad points on the screen, whether the color of the screen is true, whether the brightness is too harsh, and whether there is light leakage on the screen.

What are the main aspects of a good LCD TV?

screen size screen proportional resolution response speed brightness 1. Screen size is the most important parameter to pay attention to when buying LCD TV.
although it is a surface factor, It refers to the length of the diagonal line of the LCD screen.
the unit is inches.
large LCD TV has better viewing effect.
it is more conducive to watching from a distance or in a spacious environment.
however, due to the influence of the LCD panel manufacturing process.
the cost of large LCD screen will rise sharply, Of course, the price is really expensive.
the main screen size of mainstream products is 30 to 40 inches.
the reasonable viewing distance of LCD TV is about 4 times of the screen size of TV.
for example,
for 21 inch TV, the best viewing distance is 2.13 meters; 29 inch TV, the best viewing distance is 2.95 meters.
so when you buy LCD TV, you can't be greedy for big TV or small TV for low price. You should decide the screen size of LCD TV according to the size of your home space.
Second, screen ratio refers to the ratio of screen width and height.
also known as aspect ratio, It is also called aspect ratio or screen ratio).
at present, the screen ratio of LCD TV generally has two kinds: 4:3 and 16:9.
almost from the generation to the middle of last century.
most of the film picture ratio is the standard 1.33:1, which is 4:3, in order to facilitate the TV broadcast, The traditional TV also adopts this standard ratio.
because our current TV programs are transmitted by analog signals.
so it is most suitable to watch them on a 4:3 screen.
in this paper, we present a new method for TV programsHowever, digital signal transmission is the trend.
therefore, the 16:9 screen of LCD TV is likely to replace the 4:3 screen.
if you buy a machine as an expedient, use it temporarily, and change your house or machine in the future, you should buy a 4:3 screen, It's most comfortable to watch the programs transmitted by analog signal nowadays.
but if you want to reach the goal in one step, you have to consider buying a TV with 16:9 screen, but when you watch the programs transmitted by analog signal, you have to hurt your eyes.
3 Resolution is a very important parameter for LCD TV.
refers to the number of pixels on the screen.
the physical resolution of LCD TV has the characteristics of being fixed.
if the LCD TV works at a non-standard resolution, it will cause the display image distortion.
the best resolution of LCD TV.
also known as the maximum resolution, LCD TV can display the best image.
when LCD TV presents the display mode with low resolution.
there are two ways to display.
the first one is the center display: for example, in xga1024 × The svga800 is displayed on the screen of the 768 × 600.
only 800 in the middle of the screen × At present, this method is rarely used.
another method is called extended display: when the image is lower than the best resolution.
each pixel is extended to adjacent pixels by differential algorithm, This makes the whole picture full.
it also makes the picture lose its original clarity and true color.
that's why TVs that display very good pictures in shopping malls are discounted as soon as they get home.
this is the reason why TVs that display very good pictures in shopping malls are discountedYou should know that the high-definition DVD discs are played in shopping malls, while the traditional analog signals are still played at home.
one of the cores of whether TV sets can support high-definition digital signals in the future is the resolution.
at present.
most LCD TVs sold on the market have a resolution of> 1024x768, which can meet the future high-definition requirements, but most plasma TVs only have a standard definition resolution of 852x480, It is difficult to meet the requirements of ultra-high image quality.
the recommended standard is that the resolution of TV sets over 30 inches should reach> 1024x768.
IV Response speed response speed is also known as response time, which is the response speed of each pixel of LCD TV to the input signal.
that is, the time required for a pixel to turn from dark to light or from light to dark.
generally, the response time is divided into two parts: rise time and fall time.
when expressed, the sum of the two shall prevail.
if the response time is not fast enough.
the response time of the pixel to the input signal is not fast enough At present, most LCD TVs on the market are 8 / 16ms.
compared with CRT TVs with a response time of less than 10ms, there is still a little difference. The 7th generation line has improved the response speed of LCD TVs to 6ms, or even 4ms, 5. Brightness refers to the brightness of the TV set under the white picture.
the unit is candela per square meter (CD / m2) or nits.
candela per square meter (CD / m2) or nits means candela brightness per square meter.
that is, the light intensity per unit area.
liquid crystal is a kind of material between liquid and crystal.
liquid crystal is a kind of materialIt can control the light penetration through the current, so as to display the image.
the liquid crystal itself does not emit light, so all LCD TVs need backlight, and the brightness of the backlight determines the brightness of the display.
at present, there are two ways to improve the brightness.
one is to improve the light transmittance of the LCD panel; The other is to increase the brightness of the background light, or increase the number of light tubes.
improving the light passing rate of the LCD panel is also known as "polishing technology."
the surface of the display screen is like installing a layer of glass, which not only enhances the reflection of light, but also improves the color contrast and saturation of the screen.
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