Cathode Ray Tube

CRT may refer to any of the following:

Short for cathode ray tube, a CRT is the electron beams in a monitor that move across your screen either interlaced or non-interlaced, hitting phosphor dots on the inside glass tube. The picture is an example of the inside of a computer monitor that shows the CRT connected to the screen.

In the CRT are three electron guns: red, green, and blue. Each of these guns streams a steady flow of electrons, left to right, for each line of your monitor. As the electrons hit the phosphors on the CRT, the phosphor will glow certain intensities. As a new line begins, the guns will then begin at the left and continue right. These guns will repeat this process sometimes thousands of times until the screen is completely drawn line by line.

Once the phosphors on the CRT have been hit with an electron, they only glow for a short period of time. Because of this, the CRT must be refreshed, which means the process will be repeated as explained above. If the video card's refresh rate is not set high enough, you may encounter a flicker or a noticeable steady line scrolling from the top to the bottom of your screen.

History of the CRT

While cathode rays were first discovered in 1869 by Johann Hittorf, it wasn't until 1897 that the first CRT was invented by Ferdinand Braun. Named the "Braun tube," the first CRT used a code-cathode diode, having a phosphor coated screen.

John B. Johnson and Harry Weiner Weinhart created the first CRT to use a hot cathode, turning it into a commercial product in 1922.

In 1934, the first CRT televisions were made available commercially in Germany by Telefunken. Since then, CRT technology was improved many times and utilized in computer monitors, as well as televisions. CRT monitors and televisions were widely used

around the world until the 2000s, when LCD technology became more popular and began to replace CRT. Today, CRT is considered mostly obsolete.

What is an Operating System? » Computer Shortcut Keys and their Functions » Keyboard Function Keys » Computer Basics - Hardware - Software - Parts

Short Stories for Kids - Moral Stories – English Short Stories for Children - Moral Stories for Kids - Stories for Kids - Funny Story for Kids - Scary Stories for Kids - Really Funny Short Stories - Bedtime Stories
Proverb Stories
Powerful Motivational Quotes for Students » Success Quotes » English Short Stories for Kids

Cabin Crew Jobs & Career Advice » Secretary Job Description » Receptionist Job Description » Top 100 Interview Questions and Answers » How to Prepare for an Interview » How to Write a CV » How to Choose a Career » Computer Shortcut Keys and their Functions

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Computer Basics FAQ.

Army Jobs - Navy Jobs - Military Jobs

Scholarship 2024/25

Current Scholarships 2024/2025 - Fully Funded

Full Undergraduate Scholarships 2024/2025

Fully Funded Masters Scholarships 2024/25

PhD Scholarships for International Students - Fully Funded!

Funding Opportunities for Journalists 2024/2025

Funding for NGOs 2024/2025

Funding for Artists 2024/2025

Funding for Entrepreneurs 2024/2025

✅Over 4500 Current Fully Funded Scholarships for International Students

✅ Undergraduate Scholarships 2024

✅ Masters Scholarships 2024

✅ PhD Scholarships 2024 Click Here!

Free Scholarship Newsletter --- E-mail Address

First Name

Then Don't worry — your e-mail address is totally secure. I promise to use it only to send you Advance Africa Newsletter.