pctechguide.com

  • Home
  • Guides
  • Tutorials
  • Articles
  • Reviews
  • Glossary
  • Contact

CRT Projectors

A CRT projector works in much the same way as a CRT TV, the video image being formed on three picture tubes, each of which produces one of the primary optical colours. High voltage within the set is required to excite the electron beam within a picture tube, which then generates light output when the electron beam hits the phosphor surface of a tube. The red, blue and green images are then aligned on the screen to form one colour-integrated image.

CRT

Picture tubes typically have a manufacturer life rating of 10,000 hours. It is the phosphor surface that wears generally, not the electron gun of the CRT. Moreover, it will wear faster the higher contrast and brightness settings the projector is operated at. A related problem is that CRT projectors are susceptible to static images burning themselves into a tube’s phosphor surface, something that can happen in as little as 1000 hours.

CRT projectors are analogue and so do not have a fixed number of pixels (native resolution) like digital devices. They therefore have greater versatility when it comes to producing clear images from sources with a range of resolutions.

The images they produce are characterised by excellent colour balance and contrast and particularly good reproduction of black levels and flesh tones. The fact that there are no lamps to change periodically is also an advantage.

However, they’re generally bulky, expensive, complex to set up. They typically have a lower average lumen output than other type of projector and require a darkened room for optimum performance. Being analogue devices, they need to be realigned periodically. Significantly, they’re largely discontinued from production.

As a consequence, their use is increasingly confined to large, fixed-mount systems – often permanently installed – in larger presentation rooms.

  • CRT Projectors
  • LCD Projectors
  • DLP Projectors
  • LCOS Projectors

Filed Under: Projectors

Latest Articles

How to Secure IT Infrastructure when Working from Home

Hackers aren't just going after business owners. They are increasingly attacking consumers, as well. In December, the New York Times reported that hackers took control of a family's home security cameras. These problems are escalating during the pandemic as more people are working from home. … [Read More...]

DDR SDRAM explained

Double Data Rate DDR) SDRAM is the other competing memory technology battling to provide system builders with a high-performance alternative to Direct RDRAM. As in standard SDRAM, DDR SDRAM is tied to the system's FSB, the memory and bus executing instructions at the same time rather … [Read More...]

CDR-RW Over-burning

The Red Book standard for an audio CD specifies a capacity of at least 74 minutes plus a silent lead-out area of approximately 90 seconds, used to indicate the end of a disc. Overburning, also known as oversizing, is basically writing more audio or … [Read More...]

How to Start a Business in Computer Engineering

Did you know that there are 66,200 computer engineers in the United States? This can be a very lucrative career path. However, you may have an easier … [Read More...]

Best Techniques for Defragmenting a Hard Drive

We recently published a post on the importance of defragmenting a hard drive. We wanted to cover the actual process in more depth. The first thing … [Read More...]

Why You Need to Regularly Defragment Your Hard Drive

Your computer's hard disk of is one of the most vital parts of your machine. It needs to operate reliably and quickly for your computer to function … [Read More...]

Container vs VM: What Is the Difference and Which One to Pick?

VMs and containers are two implementations of virtualization technology. This means that both VMs and  containers help to optimize how resources … [Read More...]

Privacy Considerations with Photos and Videos on Your Smartphone

New technology makes it easier than ever to capture images and videos. This technology is getting smaller and easier to use. As a result, the quality … [Read More...]

Tips on How to Land a Remote Job in Cyber Security

The demand for skilled cyber security professionals is growing as well as a number of threats and risks. Any company needs an expert or team to … [Read More...]

Guides

  • Computer Communications
  • Mobile Computing
  • PC Components
  • PC Data Storage
  • PC Input-Output
  • PC Multimedia
  • Processors (CPUs)

Recent Posts

AMD Radeon R9 285 Graphics

The AMD Radeon R9 285, is the graphic card designed to meet the demand on maximum playing PC games better and faster like no other … [Read More...]

A Day In The Life of A Cell Phone

Via: CellPhoneTrek … [Read More...]

Piezoelectric Printer Technology

Epson's proprietary inkjet technology uses a piezo crystal at the back of the ink reservoir. This is rather like a … [Read More...]

[footer_backtotop]

Copyright © 2022 About | Privacy | Contact Information | Wrtie For Us | Disclaimer | Copyright License | Authors