What is a monitor?
A computer monitor is actually an output device that displays computer information in a beautiful and user-friendly form and is one of the devices that make using a computer much easier and better. Below we examine the types of monitors such as: LCD
Types of monitors
The current types of monitors are:
CRT monitors
LCD monitors
LED monitors
organic light emitting diode (OLED) monitors
Television technology has evolved greatly over time, from CRT televisions that used one or more Electron Guns to display images to LCD technology that uses a backlight to create images. Here we want to review the advances in display technology and the evolution of television in the last 50 years; That is, from CRT TVs to OLED.
A look at the evolution of television
The earliest versions of CRT televisions were known as Braun Tubes, which used an accelerator and deflection of an electron beam inside the screen to create an image and an electron gun or more to view the image. These televisions were only able to play black and white images. However, people were excited about this new invention that they had never seen before. The dawn of the golden age of television, color televisions
The CRT monitors
These monitors evolved in the 1980s, and at the end of the decade, CRT monitors with excellent capabilities were introduced to the market by companies such as IBM. CRTs have an interesting structure in that there are three electron guns at the end of them, which respectively shoot three colors of red, green, and blue phosphors towards the screen, which results in a pixel. This electron beam by The magnetic field is directed towards the screen.
It is interesting to know that when they say that the image is 800*600, it means that there are 800 dots or pixels in the horizontal line and 600 lines from the top to the bottom of the screen, which by multiplying them together becomes close to 480,000 pixels, and the more pixels there are, the better the quality. The solution is getting better. The more resolution we want, the bigger the monitor, because it holds more pixels. In current CRTs, pixels are refreshed between 60 and 80 times per second, which means electron guns have 18,000,000 shots per second. they do . If an image is refreshed 80 times per second, that means its frequency is 80H. Below is a picture of a CRT monitor
Desire for larger screens, PDP TVs
As televisions continued to evolve, the plasma display panel (PDP) made it possible to build larger televisions. PDP TVs allowed lighting to be adjusted using electronic discharge to RGB pixels. PDP TVs with this new technology could have a flat and larger screen. However, these televisions had disadvantages such as high energy consumption and buzzing noise.
They had disadvantages such as high energy consumption and buzzing noise. Large screens have become the norm, LCD TVs
For better clarity on LCD screens, a liquid crystal display is an electronic visual display in which a layer of liquid crystal is placed in front of the backlight of CCFL lamps to produce images. LCD TVs were able to solve most of the problems of PDP TVs. However, due to their backlight, these TVs could not produce pure black and had limited image quality.
Quality image on a bigger screen, LED TVs
For better clarity on larger screens, LCD TVs were equipped with LED backlights and increased resolution. The quantum dot produced today is a type of LED TV. However, more pixels mean more power consumption, and the backlight creates a halo of light, so image quality was still flawed.
Finally, the perfect picture was realized, the OLED TV
As an evolved TV, the main goal has been to provide images similar to the real world, and finally, with OLED TVs, a real image has entered our lives on a larger screen. The difference in the image quality of these TVs does not come from the number of pixels, but from the pixels themselves. OLED TVs use a simple structure without backlight. These TVs can control the amount of light and perfect black display by means of thousands of independent light pixels. OLED TVs display an image with very high detail that has never been seen before, using an unlimited contrast range.
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