I don't know what advertising companies want big head monitors for?
Author:Liu kunkun Time:2021-09-11 16:49 Browse(898)
This should start from the manufacturing process of the display. Led and display display display high images and bright colors. However, if you do set up renderings, inkjet or photo, the effect will be different from the actual situation. However, LCD (that is, the display with big head as you call it) has similar color matching effect and inkjet effect. Therefore, many advertising companies use LCD display.
In terms of the manufacturing process of the display, the LED and the display display display high images and bright colors. However, if you set up the renderings, the effect of inkjet or photo will be different from the reality, while the effect of LCD (that is, the display with big head) is similar to that of inkjet, So many advertising companies use LCD displays.

I don't know what advertising companies want big head monitors for?

big head displays are called cathode ray tube displays.
CRT.
because CRT display principle is electron bombardment phosphor.
it belongs to self illumination, with gorgeous colors, high brightness and good contrast. It can basically restore the human eye's perception range of colors, with small distortion, That is to say, the color you can see on the screen is the color printed by the printer.

the name of flat panel display is LCD.
LCD itself does not emit light.
it's like you take a glass lens, you can see what color you can paint through the lens.
behind the LCD panel, you need a light source.
it used to be a cold cathode lamp (CCFL), It's the type of fluorescent lamp.
at present, LED is basically used.
the main reason is that led has longer life and higher luminous efficiency than CCFL.
CCFL or LED emits white light (approximate white light).
then the color is displayed through the LCD board (the glass lens you take).
but this color gamut is not wide enough.
that is, it is not gorgeous enough, plus the brightness The contrast can't be compared with CRT.
that is, you can't see the perceptual range of human eyes on the LCD.
for example, if there are two pictures with very similar colors, you can distinguish two colors on CRT, but you can think that the two pictures are the same on the LCD,This is unacceptable to graphic designers.

it's just like what I see on the screen is apple.
as a result, the picture is short of pears( Of course, this is too exaggerated)
If LCD is required to be close to CRT display effect, then the price of LCD will be very expensive. For example, the LCD used in some medical equipment in hospitals now has very good effect, which is close to CRT (there is still a gap). However, the price is tens of thousands to tens of thousands, which is unacceptable to advertising companies, And the effect is still far behind.

in fact, it is the CRT used by advertising companies.
it is not an ordinary CRT, but a more professional model, and the price is more expensive than ordinary CRT.
I still have a CRT in use now.
it has been used for more than ten years, and the display effect is still steel.

however.
with the development of technology, It is an indisputable fact that CRT is completely replaced by LCD.

in addition to CRT and LCD,
in fact, there is also plasma display (PDP), which is self luminous and has better display brilliance than LCD, but the effect of plasma resolution is poor, so it is not high in the display now.

there are also light-emitting diode (LED) displays.
this technology has not been developed to the level of home use, In the future, this technology is likely to be used for home displays.
at present, this technology is used for outdoor large screen displays.

for example, the large screen in the square.

in addition to these,
DLP technology is not common. At present, it is mainly used for projection, and this technology is only in the hands of TI company in the United States.
its principle is still similar to that of liquid crystal.
It does not emit light, and is displayed by an external light source (single white light plus primary color wheel or multiple groups of color lights).
.
the color of the light source is different from that of the light source
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