Thursday, November 04, 2004

Plasma Televisions: A Buyer's Guide

Plasma Televisions Brief History

In 1996, the Federal Communications Commission (FCC) enacted legislation compelling the nation's 1600+ television stations to change the way they broadcast their programming-i.e., to start transmitting it digitally. Thus began the rise of digital television (DTV) in America. For now, the FCC has allocated an additional channel spectrum to the media. This has allowed the media to offer digital broadcasts in parallel with their existing analog ones, giving consumers the opportunity to watch regular TV while they make the switch to DTV.

Once the transition to digital is complete-by the year 2006 or by the time 85% of US households get digital feeds, whichever occurs later-the federal government will auction off the original analog channel spectrum. And DTV will be the new standard in broadcasting. Sure, you'll still be able to watch your favorite shows in analog like always, but you'll need to "update" your existing TV with a device that converts digital signals into analog ones. All of which begs the question: Why not just go with the digital flow?

What exactly is plasma TV?

Most people know plasma TVs as those unbelievably thin display monitors that can be hung on your wall just like pieces of video art. (To give you an idea of the space-saving advantages of plasma technology, consider this: A 40-inch TV may be two feet deep and weigh upwards of 150 pounds, while the same size plasma display might have a depth of, say, 6 inches and weigh half as much.) But this isn't your average slimmed-down television set. The display itself consists of thousands of "cells," which are individual glass compartments injected with neon-xenon gas suspended in plasma-hence the "plasma" appellation. These cells are the basic elements comprising the picture you see on your TV screen. When the gases are electrically charged, they strike red, green, and blue phosphors. Just like that, an image (which is nothing more than the sum of the aforementioned colored elements, commonly known as "pixels") is born.

What are the advantages of having a plasma TV?

The picture is smooth, colorful, and (best of all) wide. Plasma TVs have none of those annoying scan lines that conventional sets do. This owes to the fact that each pixel cell has its own transistor electrode, which creates smooth, evenly lit images across the entire surface of the display. Many of the newer plasma displays also have built-in line doubling to improve the image quality of even low-resolution video signals. And they are saturated with color; some high-end plasma TVs are capable of displaying 16.77 million colors! Plasma sets offer super color realism and exceptional gradations among colors. In fact, these color-saturated images are what give plasma displays an edge over other types of video displays in the eyes of many consumers.

Plasma displays have a 16:9 aspect ratio (i.e., 16 units wide to 9 units high), the proper one for viewing HDTV and for watching DVDs. But most television shows are still broadcast in the more traditional 4:3 aspect ratio, the one that more closely approximates the dimensions of conventional TV sets. Does this mean that you'll have to watch some shows where the image is distorted or stretched unnaturally? No. When displaying a "normal" or 4:3 picture image from satellite, VCR, or cable TV, the image can be viewed in a number of ways-in its original format (with black or gray bars on the sides of the screen), or in "full" mode (where the image is converted or "stretched" using specially designed algorithms to reduce the visible stretch marks as much as possible). This is only a temporary dilemma, of course: Since HDTV is shown in widescreen, this is the format of the future for broadcast television.


The display is multi-functional and long-lived. A plasma display is a television monitor, capable of displaying HDTV, regular TV, and home video. It's also a computer monitor. In fact, it can accept any video format. Plasma displays typically include inputs for (a) composite video, (b) S-video and component video, and (c) one or more RGB inputs from a computer. You can expect to use you plasma display in many capacities and for many years: The average lifespan of one of these displays is 30,000 hours. That's about 3.5 years of 24/7 usage! If watching TV was your full-time job, and you did it for 8 hours a day, it would take you more than a decade to wear out your plasma display.

A plasma TV will perform exceedingly well under most ambient light conditions. A very bright light does not "wash out" its picture, nor does backlighting cause a glare on your TV screen. The beauty of these flat screens is that, unlike front view projections screens, you don't have to turn out the lights to see the image clearly and easily. Moreover, you can watch TV from almost anywhere in a room, since flat screens have a 160° viewing angle.

Samsung 56" Widescreen HDTV Monitor TV

Image Hosted by ImageShack.us

Features:

TV/VIDEO

* DLP (Digital Light Processing) TV
- Compact Light
-Weight Design-Fits Where Others Won't
* Samsung Cinema Smooth Gen 3 HD Third Generation Light Engine
- Single Panel Digital Micro-Mirror Device (DMD) Design for a Crystal Clear Picture Without Any Possibility of Convergence Errors
- High Output 0.55" DLP Technology by Texas Instruments
- Smooth Film-Like Pixel Free Images
- 1500:1 Contrast Ratio with Outstanding Color and Deep Black Levels - 30% Quieter Operation (48db)
* Samsung's Latest Generation DNIe Video Enhancer
* Samsung's Cinema Smooth Film-Mode 3:2 Pull Down powered by Genesis™
* 1280 x 720 Digital Format Converter for All Inputs
* HDTV Performance with Add-On HDTV Tuner or HD Receiver
* New HDMI and DVI Inputs for True Digital Performance
* No Screen Aging or Burn-In Effects for Worry-Free Enjoyment

AUDIO

* 30-Watt Stereo Audio System with SRS TruSurround XT

DIGITAL CONNECTIONS
* DVI HDTV Input (Digital Visual Interface)
* HDMI Input (High Definition Multimedia Interface)
* 2-Component Video Inputs (480i/480P/720P/1080i)

Tuesday, November 02, 2004

TiVO

In 1998, design engineers at TiVo, the Silicon Valley company that helped introduce the digital video recorder to the world, set out to produce a distinctive remote control. The result was a textbook blend of complexity and ease of use.

555 Timer Tutorials & Examples

http://www.uoguelph.ca/~antoon/gadgets/555/555.html

http://www.williamson-labs.com/480_555.htm

http://ourworld.compuserve.com/homepages/Bill_Bowden/555.htm

http://www.see.ed.ac.uk/~kap/Hard/555/aplications.html?http://oldeee.see.ed.ac.uk/~kap/Hard/555/aplications.html

555 timer designer


Scanning tips for photos and documents

Photovoltaics: Turning Sunlight Into Electricity

Sunday, October 31, 2004

Boeing Marks Completion of Its 757 Commercial Airplane Program

Boeing marked the completion of its 757 commercial airplane program, as thousands of employees and special guests saluted one of history's most successful passenger airplanes.

The 1,050th and final 757, a Shanghai Airlines 757-200, was the centerpiece of a ceremony at the company's Renton, Wash., factory. The 757 is one of only seven large commercial jetliner models that sold more than 1,000 units.

more

SAMSUNG Introduces World’s First 5-Megapixel Camera Phone

Samsung Electronics unveils the world's first mobile phone (model: SCH-S250) equipped with a 5-megapixel camera. Just one year after the introduction of its first 1-megapixel camera phone and 3 months after its first 3.2-megapixel camera phone, Samsung proves its technological prowess again with this revolutionary product.

More