You are here:   HomeComputer Graphics
by Dinesh Thakur Category: Graphics Devices

LCD stands for liquid crystal display. Your digital watch uses an LCD to show you the time, and most portable computers use an LCD to display the screen. There is actually a liquid compound, liquid crystals, sandwiched between two grids of electrodes. The electrodes can selectively turn on the different cells or pixels in the grid to create the image you see.

 
by Dinesh Thakur Category: Graphics Devices

A pixel (short for picture element, using the common abbreviation "pix" for "picture") is one of the many tiny dots that make up the representation of a picture in a computer's memory. Each such information element is not really a dot, nor a square, but an abstract sample.



 
by Dinesh Thakur Category: Graphics Devices

In Shadow Mask CRT tiny holes in a metal plate separate the colored phosphors in the layer behind the front glass of the screen. The holes are placed in a manner ensuring that electrons from each of the tube's three cathode guns reach only the appropriately-colored phosphors on the display. All three beams pass through the same holes in the mask, but the angle of approach is different for each gun.

 
by Dinesh Thakur Category: Graphics Devices

There are used for erasable disks. MO system includes basic principles of both magnetic & optical storage systems. MO systems write magnetically & read optically. It has two standard forms : 5.25 inches & 3.5 inches.

 
by Dinesh Thakur Category: Graphics Devices

In a standard television-like computer monitor, an image is produced on the screen by a beam of electrons sweeping rapidly across the surface of the picture tube, lighting up the screen as it passes. Starting at the top, the beam traces one horizontal row across the screen, shifts down a bit and does another row, and so on, until the full height of the screen has been covered.



 
by Dinesh Thakur Category: Graphics Devices

CGA stands for color graphics adapter, the first IBM video card to permit graphics on the screen. We're lucky they've come out with better models, because CGA graphics are gawdawful crude. With a CGA, your screen can show up to 640 dots across by 200 dots up and down, with only one color. Even at that maximum resolution, pictures look really blocky and out of proportion. Pictures will look even more blocky if you want 4 colors on the screen at once, since you're then limited to 320 dots across and 200 down. If you can tolerate a totally chunky display of 160 by 200 dots, you can get a maximum of 16 colors on a CGA. Wow!

 
by Dinesh Thakur Category: Graphics Devices

Monitor is another word for the computer screen. But "monitor" encompasses the whole piece of equipment, rather than just the screen part that you look at. You also might hear a monitor called a display, as in "Oooh, I got a new two-page display," or VDT(video display terminal), as in newspaper journalism, or CRT (cathode ray tube), which is the technical term for a picture tube. However, flat panel screens like LCDS are not referred to as monitors, even if they're housed externally from a computer.



 
by Dinesh Thakur Category: Graphics Devices

VGA, which stands for video graphics array, is currently the most popular standard for PC screen display equipment. Technically, a VGA is a type of video adapter (circuitry in the computer that controls the screen). IBM developed the VGA for its PS/2 line of computers (the name "Video Graphics Array" is an IBM trademark), but loads of other manufacturers make VGA add-in boards (that plug into a slot in the pc) and VGA chips (in some pcs, these VGA chips are built right into the main part of the computer, the motherboard). A VGA monitor is a monitor that works with a VGA adapter.



 
by Dinesh Thakur Category: Graphics Devices

Vector graphics are stored in the computer as a set of mathematical formulas describing the shapes that make up each image. When you display a vector graphic on the screen or print it, these formulas are converted into the patterns of dots you can see. Because the dots are not specified unit! you display or print the graphic, you can change the size of the image without any loss of quality, and the image will always appear at the highest resolution of whatever screen or printer you're using. The term vector graphics means exactly the same thing as object-oriented (or just object) graphics.



 
by Dinesh Thakur Category: Graphics Devices

LED stands for light emitting diode. You know those little lights on your computer, usually near the hard disk, that flash while the computer is working? Those are LEDs. They work on the principle of electroluminescence, which refers to substances that glow when you apply electricity. LEDs were used in digital watches, but now all digital watches use LCDs because LCD stakes less power.



 

Page 6 of 10



Subscribe To Free Daily Newsletter!

Get Free News Updates Delivered Directly To Your Inbox
About Dinesh Thakur

Dinesh ThakurDinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to contact us.



What's New and Popular





Search Content







Advance Courses



Basic Courses



Advertise with Us