What is CRT Monitor?

In the rapidly changing world of technology, where new inventions can make older devices obsolete quickly, it’s fascinating to look back and learn about the tech ancestors that paved the way for the devices we use today. One such device that dominated the display technology for most of the 20th century was the CRT monitor.

The Birth of the CRT Monitor

The CRT, which stands for cathode-ray tube, was invented in 1897 by German physicist Ferdinand Braun. The foundation of CRT technology is a vacuum tube where electrons are fired toward the front of the display, creating an image as they collide with phosphors at the front.

The Early Days of CRT Technology

How a CRT Monitor Works

Three electron beams (red, green, and blue) are shot inside a CRT display from the back. As these beams pass through a shadow mask or aperture grill, they’re directed to specific, evenly spaced holes or gaps in the shadow mask or distance between wires in the aperture grill. This causes the electrons at the front of the monitor to hit the phosphors, creating a color image.

 CRT Monitors in the Realm of Gaming

CRT monitors were once the holy grail for gamers. Why? They offered a faster refresh rate, meaning the screen could update its display more often, providing a smoother gaming experience. Newer monitors like LCDs and LEDs have only recently caught up to the standard refresh rates on CRTs. Retro gamers and those with a CRT in mind argue that certain games, especially older ones, look and feel better on a CRT display.

 Comparing CRTs to LCD and LED Screens

Modern LCD and LED monitors are the newer display technologies that have replaced the older CRT monitors in the last few decades. LCD stands for Liquid Crystal Display, which uses a digital method to display an image, unlike analog CRTs. The significant advantages of modern LCD screens over the old CRT are that they are lighter, more energy-efficient, and can support higher resolutions.

A side-by-side comparison of CRT, LCD, and LED monitors, highlighting the differences in technology, design, and display quality among these types of monitors.

However, CRT monitors are analog, and many enthusiasts believe they offer better color accuracy, sharpness, and resolution and refresh rate combinations, especially at lower resolutions. A 21-inch CRT could comfortably run at 1600 x 1200 resolution, whereas an LCD screen might struggle with the same resolution.

 Features of CRT Monitor?

CRT (Cathode Ray Tube) monitors were the standard for display technology for several decades before LCDs, LEDs, and other display technologies emerged and became mainstream. While they might seem antiquated compared to today’s flat-panel screens, CRT monitors had several distinct features that made them popular for various applications, especially in professional video editing, graphics design, and gaming.

High Refresh Rate

Fast Refresh Rates: One of the most celebrated features of CRT monitors was their ability to support very high refresh rates, often upwards of 100Hz or more. This meant smoother motion on the screen, which was particularly beneficial for gaming.

Color Accuracy and Depth

True Black Levels: CRTs could offer deep and authentic black levels, unlike many LCDs, which struggle to produce true black.

Excellent Color Reproduction: CRTs were known for accurately displaying colors, making them favored among graphic designers and video editors.

Multiple Resolutions

Native Support for Multiple Resolutions: CRTs didn’t have a fixed number of pixels like modern screens. This meant they could display various resolutions natively without scaling issues.

 Durability and Longevity

Longevity: CRTs were robust and could last many years with minimal issues.

Resilience to Static Images: CRTs are less prone to permanent screen burn, unlike LCDs and OLEDs, which can suffer from burn-in when a static image is displayed for too long.

 No Input Lag

Minimal Input Lag: CRT monitors typically had negligible input lag, making them ideal for real-time applications such as gaming.

 Viewing Angles

Wide Viewing Angles: There was minimal color or brightness shift when viewing a CRT screen from an angle, a feature modern IPS panels emulate, but earlier LCDs struggled with.

 No Pixel Structure

No Fixed Pixel Structure: Unlike modern screens, CRTs didn’t have a grid of pixels. This meant no risk of dead pixels or uneven backlighting.

 Display Characteristics

Moiré Patterns: Due to CRTs’ function, sometimes moiré patterns could appear on the screen, especially when displaying certain images or patterns.

Dot Pitch: This measured the distance between the phosphor dots that comprise the image on a CRT. A smaller dot pitch indicated a sharper image.

Shadow Mask and Aperture Grille: CRT monitors used either a shadow mask or an aperture grille to ensure that the electron beams hit the correct phosphor dots. Sony’s Trinitron monitors utilized the aperture grille method and were particularly popular for their sharpness and brightness.

 Electromagnetic Interference

Electromagnetic Emissions: CRTs emitted a small amount of electromagnetic radiation, leading to low-radiation standards and models.

 Flexibility in Display Modes

Versatility: CRTs could switch between various display modes (e.g., VGA, SVGA, XGA) with ease, providing flexibility based on user needs.

 Glass Screen

Glass Protection: The front of the CRT was made of glass, providing a certain degree of robustness, though it was also prone to reflections and glare.

The Decline of the CRT Technology

Despite their superiority in some areas, CRT monitors and televisions started to decline with the advent of newer display technologies. A modern display, like an LCD or LED, is much lighter; a 21-inch CRT could weigh nearly 100 pounds! Modern screens are brighter and more colorful, making them more appealing to the general public.

Finding or Buying a CRT Today

Given the shift towards LCD and LED technologies, finding or buying a CRT can be challenging. However, the secret to finding or buying a CRT is to look in niche markets, such as retro gaming communities, or on sites like eBay or Etsy. While most retailers won’t stock a new CRT, they have a booming second-hand market. If you plan to use a CRT, you might need adapters like VGA to HDMI or DVI-A to DVI-I since modern devices often don’t support the older VGA (Video Graphics Array) that CRTs typically use.

The Legacy of CRT Monitors

The CRT computer monitor has played a crucial role in the evolution of display technology. This technology has left an indelible mark, from the first CRT TVs to 13 and 21-inch CRT monitors that became ubiquitous in homes and offices. CRT technology showed the world what was possible regarding resolution, refresh rate, and gaming experience before fading into the annals of tech history.

Even as the world embraces modern LCD and LED monitors, the CRT is a testament to the leaps and bounds that display technology has made over the past century.


While you might not want to display a bulky, black-screen CRT in your living room today, there’s no denying this technology’s pivotal role in the realms of televisions, computer monitors, and gaming. As newer monitors become available, offering even more advanced features, it’s essential to remember and respect the CRT’s place in technological history. Whether you’re a passionate retro gamer or just someone interested in the evolution of technology, there’s a lot to admire in the CRT’s lasting legacy.

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