pctechguide.com

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

Laser Printer Communications

A laser printer needs to have all the information about a page in its memory before it can start printing. How an image is communicated from the PC’s memory to a laser printer depends on the type of printer being used. The crudest arrangement is the transfer of a bitmap image. In this case there is not much the computer can do to improve on the quality, so sending a dot for a dot is all it can do.

However, if the system knows more about the image than it can display on the screen there are better ways to communicate the data. A standard A4 sheet is 8.5in across and 11in deep. At 300dpi, that is more than eight million dots compared with the eight hundred thousand pixels on a 1024 by 768 screen. There is obviously scope for a much sharper image on paper – even more so at 600dpi, where a page can have 33 million dots.

The major way quality can be improved is by sending a page description consisting of outline/vector information and allowing the printer to make the best possible use of it. If the printer is told to draw a line from one point to another, it can use the basic geometric principle that a line has length but not width, and draw that line one dot wide. The same holds for curves, which can be as fine as the resolution of the printer allows. The idea is that one single page description may be sent to any suitable device, which would subsequently print it to the best of its ability – hence the much-touted term, device independent.

Text characters are made up of lines and curves so can be handled in the same way, but a better solution is to use a pre-described font shape, such as TrueType or Type-1 formats. Along with precise placement, the page description language (PDL) may take a font shape and scale it, rotate it, or generally manipulate it to its heart’s content. There’s the added advantage of only requiring one file per font as opposed to one file for each point size. Having predefined outlines for fonts allows the computer to send a tiny amount of information – one byte per character – and produce text in any of many different font styles and many different font sizes.

  • Laser Printer Communications
  • Laser Printer Operation
  • LED Laser Printers
  • Color Laser Printers
  • Laser printer Consumables
  • Environmental Issues
  • Page Description Languages
  • PostScript Laser Printers
  • PCL Laser Printers
  • GDI Laser Technology
  • Adobe Print Gear

Share this:

  • Click to share on Twitter (Opens in new window)
  • Click to share on Facebook (Opens in new window)

Related

Filed Under: Laser Printers

Latest Articles

Scheduling Tasks Cleanup

Scheduling Tasks Cleanup

Open up the Scheduled Tasks tool from the Start menu, either via Programs > Accessories > System Tools ... ... or via Settings > Control Panel > Scheduled Tasks. It's likely that some tasks have already been automatically set up, either by Windows or applications that … [Read More...]

Hard Disk PLEDM

Notwithstanding the various candidates for the hard disk technology for the next millennium, it could be that the future of hard disks doesn't lie in mechanical storage systems at all. Developments in memory technology could mean that … [Read More...]

CD-ROM Operations

CD-ROM Operations

Apart from far more sophisticated error-checking techniques, the innards of a CD-ROM drive are pretty much the same as those used in CD audio players. Data is stored in the same way on all CDs. The information is stored in sequential 2KB … [Read More...]

Comments

  1. Andre says

    January 23, 2012 at 3:47 am

    Thank you. It’s really nice to see there are people who share what they learn….. the whole purpose of learning. Imagine if Isaac Newton held out on the rest of us.

    Cheers

    Andre


Why Do You Need a VPN?

You may have heard of VPN, or even you may be already thinking carefully of trying it? The benefits of using a virtual private network go far beyond a … [Read More...]

4 Very Useful CAD Hacks You Might Not Be Using

The market for CAD design is growing around 7% a year. It is expected to be worth $7.3 billion by 2022. CAD experts have a lot of job security, … [Read More...]

What Are the Best eSports Games to Watch in 2020?

The esports industry is growing at a remarkable rate.  According to Statistica, the global market for esports is expected to reach $1.79 billion … [Read More...]

Choosing the Safest Crypto Wallet for the New Year

 There are a number of excellent benefits of cryptocurrencies.  They are extremely convenient and offer a tremendous amount of privacy. … [Read More...]

Guidelines on Troubleshooting Python Code

Whenever we write a computer program we need to verify that it works as expected. Usually we execute the code, if necessary we provide some inputs, … [Read More...]

Developing a Python to Extract Data from Your Smartphone

Many times we ask ourselves: "What part of the universe is this phone from?", even if we already know where it is, but we don't know which operator. … [Read More...]

Guides

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

Recent Posts

11 Biggest Mistakes When Buying a PC

Whether you are the most experienced buyer or one does not have any knowledge while buying your first computer, you will always encounter … [Read More...]

Windows privacy module

Windows Privacy Module Welcome! If you've found your way here, it probably means that you've gotten infected with Windows Privacy Module. Windows … [Read More...]

Understanding the Seven Levels of RAID Arrays

I previously covered an article on the new research on RAID arrays, which has originated from FASTA Universidad. The latter half of their paper covers … [Read More...]

Return to top of page

Copyright © 2019 About | Privacy | Contact Information | Wrtie For Us | Disclaimer | Copyright License | Authors