22. February 2016 · Comments Off on Tips for Buying a Cool TV · Categories: electronics · Tags: , , ,

A Short History of TV: The Magic of 3 Colors — RGB

TV has advanced together with our knowledge of how light can be generated. Since Scottish inventor John Logie Baird introduced the very first mechanical TV in 1925, marvelous advancements have been made to TV technology. But the foundation of color TV—the primary colors Red, Green and Blue (RGB)—is still the same as it was the first color transmissions were developed back in the 1930s and 1940s.

In fact, the emergence of the latest TV trend—thin, flat and sometimes curvy—started only about 10 years ago. In the history of TV, CRT TV dominated the market for a long period during the 20th century. It may be surprising that inside every cathode ray tube are electron guns. The TV functions when the electron guns fire three electron beams (one for each color) through a vacuum tube at a glass plate covered with a phosphorescent screen, causing the phosphors to emit light.

Despite being the dominant display technology for so long, CRT TVs have several limitations. Because the electron beams need to be the same length to all parts of the display, the screen curves away from the viewer, creating an uncomfortable surface for viewing. Additionally, a certain distance between the display and electron guns is essential, resulting in difficulty in making CRT TVs thin, and the glass screens were thick and heavy. As a result, CRT TVs have lost popularity as new display technologies arise.

TV has advanced together with our knowledge of how light can be generated. Since Scottish inventor John Logie Baird introduced the very first mechanical TV in 1925, marvelous advancements have been made to TV technology. But the foundation of color TV—the primary colors Red, Green and Blue (RGB)—is still the same as it was the first color transmissions were developed back in the 1930s and 1940s.

In fact, the emergence of the latest TV trend—thin, flat and sometimes curvy—started only about 10 years ago. In the history of TV, CRT TV dominated the market for a long period during the 20th century. It may be surprising that inside every cathode ray tube are electron guns. The TV functions when the electron guns fire three electron beams (one for each color) through a vacuum tube at a glass plate covered with a phosphorescent screen, causing the phosphors to emit light.

Despite being the dominant display technology for so long, CRT TVs have several limitations. Because the electron beams need to be the same length to all parts of the display, the screen curves away from the viewer, creating an uncomfortable surface for viewing. Additionally, a certain distance between the display and electron guns is essential, resulting in difficulty in making CRT TVs thin, and the glass screens were thick and heavy. As a result, CRT TVs have lost popularity as new display technologies arise.

The Rise of the Flat Screen
Beginning around the year 2000, the CRT era began to give way to lighter, flat screens. Before this time, it was difficult to imagine hanging a TV on the wall, but with PDPs and LCDs, wall-mounted TVs dramatically changed the interior of people’s homes.

The first alternative to CRTs to gain popularity was the PDP TV. As the name suggests, PDP uses plasma to generate light, making it thinner. Plasma is one of the four fundamental states of matter, but is not a solid, liquid or gas. It refers to the electrically neutral state when the number of positive and negative charged particles, or ions, is equal. The northern lights in the Arctic and lightning are two natural examples of plasma light. A PDP is made of two glass plates surrounding millions of phosphor-coated, gas-filled cells. When electric stimulation is produced, gas is discharged and light is emitted. Because PDPs use inert gas, there is little risk of explosion from this unique chemical reaction. There are two panes of glass, in front and behind, that protect from leaking gas. This makes PDP TVs slightly heavy, but safe.

PDPs were successful in making flat screen TVs more popular, due to a clear picture quality that was great for watching movies and sold at reasonable prices. Now, the number of PDP models is on the decline. PDPs use high voltage when discharging gas, resulting in high energy consumption and heat generation. A rather dark screen required additional power. Issues of longevity required even more voltage to generate a brighter picture. Limitations such as these made way for the next evolution in TV displays.

LCD displays addressed the disadvantages of PDPs, and have become the latest trend in TV technology. Almost 99 percent of TVs sold globally today are LCD-based TVs. Unlike PDPs and OLED TVs, which produce light on their own, LCD TVs use a backlight in the rear panel that passes through a color filter to produce a range of colors. The liquid crystal layer is located between the backlight and the color filter, blocking any color that must not go out.

Because LCD TVs use a separate backlight, the screens are brighter without sacrificing the lifespan of the TV. The human eye is more sensitive to brighter screens than darker screens, which is a major reason LCDs have become the most popular type of display today.

As for LED TVs, the explanation is fairly simple. They are simply LCD TVs that use small, long-lasting LEDs for backlight. It’s hard to believe that a fluorescent lamp is inside each display. Previously, LCD TVs used parts in the shape of fluorescent lamps for backlighting, such as cold cathode fluorescent lamp (CCFL). But these days, most LCDs use LED backlights, so the terms are almost interchangeable.

OLED is a technology that emerged more recently in the TV market. It uses millions of RGB organic LED pixels to generate light without the need of a backlight, producing more precise and deep blacks and colors. OLEDs can also be made flexible and just a few millimeters thick.

Why then do OLED TVs make up just a little over 0.1 percent of the market eight years after launching?

RGB OLED is very useful technology for mobile devices and today is most commonly used in smartphones.But OLED TVs currently in the market use white OLED (WOLED), a deviation from the RGB OLED. OLED displays produce colors on their own without the need of a color filter, but a color filter still exists in WOLED TVs. Unlike LCD TVs that use LED as backlighting, OLED displays produce their own backlighting. At this stage, verification concerning lifespan and durability of RGB OLED screens for big TVs has not been completed.

LEDs to Lead the Future of TV
When consumers choose a TV, they consider elements such as picture quality, price, design and life span. Different display technologies have their own strengths, but the TV technology that is currently satisfying consumers the most is LED display technology. Market research groups agree, predicting that LED TVs will lead the market for some time. This is due to the manufacturers who are maximizing the strengths of LED TVs by overcoming the limitations of TV.

The price of early LED TVs was expensive, reaching thousands of dollars, but has since fallen significantly, and today screens larger than 50 inches can be purchased for less than $1,000. Today’s screens can be even thinner than 1 centimeter and are ever more flexible. In the TV market, Samsung Electronics has been the No. 1 leader for 10 years, and is continuing to lead the way in the curved LED TV market.

In terms of picture quality, the essence of TV, the progress of LED TVs has been spectacular. Along with the development of software like the picture quality engine, LED TVs use technology like wide color gamut (WCG), resulting in the production of the widest color range among existing displays, and offering a picture quality that is remarkably realistic.

Several other technologies have been hailed as the “future of TV”—3D, holograms, foldable TVs and more. But Samsung believes that the near future lies in combining LED TVs with Internet of Things (IoT), providing the highest picture quality and a comfortable viewing experience.

15. February 2016 · Comments Off on 6 Easy Tips To A Successful Interview On National Television · Categories: electronics · Tags:

#1 – Do your research
Learn what you can about the show, the hosts, and audience. The more you know the more prepared you’ll be.
#2 – Be brief and simple
Put yourself in the audience’s place. No one likes to hear a person go on and on about anything, Try to be fun and spontaneous. If you have a product to promote give the audience a quick tease or tell them a relatable story that might intrigue them enough to want to purchase it. Make sure you’re clear and confident about your message. Use good eye contact with the audience and the hosts and be sure to smile.
#3 – Have visual aids
Pictures, videos during an interview are fun for the audience. But make sure you’ve cleared your plan with the show’s producers. They need to know in advance what equipment they’ll need and whether they’ll have time to do the things you want.

#4 – Make an effort to be punctual
Always make sure arrive at the set on time…and that means at least 30 minutes to an hour early. Punctuality not only shows how much you appreciate being there; you also make it easier for the producers and staff preparing for the show. Always allow enough time for the unexpected—traffic problems, change of outfits, a swing by the school to drop off your kid’s notebook—you never know what can eat up the extra few minutes you thought you would have. Also be sure to get an emergency contact number in case running late is unavoidable.
#5 – Do something new
Try to do something original and unexpected. If you’ve got something you can share with the audience, devise a fun game for choosing recipients. Cooking demonstrations and makeovers with the help of the hosts and audience are always fun, but keep in mind, you have to give producers plenty of notice.
#6 – Looks matter
No matter what you’re talking about, if you’re on TV you have to be dressed for the part. Get enough rest the night before and get up early enough to get your hair, makeup and wardrobe together. Many shows won’t have the budget to cover these things and you want to look your best. Consider hiring or even bartering for services from hairdressers, make up artists and stylists.

08. February 2016 · Comments Off on tips to choose the right tvconsoles · Categories: electronics · Tags: , ,

TV consoles are one of the easiest ways to reduce clutter and streamline the look of a living room, family room or den. They make it easy to display your television while also keeping all of your electronic devices neatly organized, and with cords tucked out of sight.
There are many styles and options to choose from, from full media units to small stands designed to fit in a corner. When shopping for a new TV console there are several things you should keep in mind:
Size: Before you begin your search you will want to know the dimensions of your television. Be sure to measure the height, width and depth. Keep in mind that older CRT or “tube” televisions require fairly large TV consoles to accommodate their boxy size – particularly their larger depth dimensions. Flat screen TVs by comparison have very thin screens so do not have much depth, but are wider than a typical “tube” television.
You will want to select a stand that can comfortably fit your TV and does not cause it to extend over the sides. Ideally, you want to allow some extra room on each side, which will provide greater stability for your TV. Another thing to consider is if you will want additional room for items such as speakers, framed photos, or other decorative objects.
Height: There is no ideal height for a TV console. Television height really is a matter of personal preference, combined with the type of seating in the room where you will be watching TV. If you’re not sure which height is best for you, a good guideline is to purchase a TV stand that will place the TV so that the lower half of the screen is level to your sightline.
Shelving: There are many different options when it comes to shelving on a TV console, so the best choice for you depends on how many items you will want to store in your console. If you simply have a Blu-ray player and a cable box/DVR, two shelves will be sufficient. However, if you also want room for items such as a video game console, stereo system, records, DVDs, CDs, etc., you will definitely want to look at larger consoles with more shelving options. If possible, select a model with adjustable shelving so you can configure it to arrange your audio-video components and media library to your liking.

01. February 2016 · Comments Off on 5 Tips for Electronics Repair · Categories: electronics · Tags:

The insides of gadgets are complicated, as you know if you’ve ever seen one of our teardowns. But don’t let that complexity intimidate you. A little reading goes a long way—even people who have a lifetime of experience with circuitry need to brush up every now and then. Here are some tips to help prevent damage to you and your device, so your repair comes off without a hitch.

1. C is for capacitor

It goes without saying that you should unplug the power cable and battery while doing a repair, but simply removing the power source doesn’t mean there isn’t a chance of getting shocked. Capacitors store charge. They can be found on power supplies and scattered throughout circuitry. While a shock from most capacitors in consumer electronics isn’t fatal, they can still give you a decent jump. When working with electronics, be sure not to grab capacitors directly or touch them with any conductive material.

If you plan on replacing a capacitor, you may need to discharge the capacitor first. If that’s the case, use our guide to build a capacitor discharge tool. Discharge time varies with size. It is important to give the tool enough time to discharge the capacitor completely.

2. ESD, the way to be

Speaking of shock, you don’t want your device to get a jump from static electricity either. Using tools designed to prevent electrostatic discharge (ESD-safe) will keep your electronics from getting zapped during repair. We carry some ESD-safe tools, such as the anti-static wrist strap, small screw extracting pliers, and tweezers. But others can be difficult to come by. If you can’t get an ESD-safe tool, make sure to work on an anti-static surface.

Using non-metal ESD-safe tools not only prevents unwanted static discharge but also will keep your devices scratch-free, inside and out. Using a flathead screwdriver to peel up a connector can damage both the connector and the board. Using a metal spudger to crack open your phone can lead to unsightly scratches. ESD-safe spudgers, which are designed to pry, get the job done without scarring disappointment.

3. Make the connection
Consumer electronics are chock-full of connectors. Yanking on a cable without releasing its connector is a great way to rip a socket off of a circuit board or tear a cable. You will begin to recognize different connector types as you gain experience. In the meantime, there are a few basics you should know.

Zero Insertion Force (ZIF) connectors require you to lift a little tab before sliding the cable out. There are lots of variations on this type of connector—some have the flap on the opposite side of the cable, others release a tab by squeezing. Your best bet is to scour the connector for tabs or clips before you start pulling wires. If you feel resistance, stop and check again.

If you have a connector without clips or tabs, the connector will likely come out either perpendicular or parallel to the board. Look for any retaining pieces on the board that may prevent motion in a given direction. Then try gently sliding the cable straight out of the socket. Pulling as straight as possible prevents damage.

4. I can’t believe it’s not butter fingers

Your fingers are host to lots of oils. No, I’m not talking about the leftover pizza grease from lunch. Even freshly washed hands have natural oils in them. These oils, though seemingly harmless, can erode markings on chips. For many repairs, this probably won’t be an issue, but play it safe by cleaning your hands before working. Always handle boards from their edges and never rub your finger directly over a chip. When in doubt, slip on a finger stall, which keeps grubby fingerprints off of delicate components. Finger stalls also protect against ESD and keep delicate electronics safe in case electrons get excited and discharge.

5. Clean sweep

It is important to get a device clean; in fact, sometimes all a device needs is a good cleaning to work again. Repairs are the perfect time to clean out your device—especially the fan. So, you’ve got your keyboard open and your first instinct is to flood the dust bunnies and Cheeto crumbs with Windex. Before you go rifling under the sink, read on! Many commercial cleaners can damage electronics. Your first method of attack: compressed air. Give the device or component a good blast of air to get rid of as much particulate matter as you can. Follow up with an ESD-safe brush or a lint free cloth. If your device is still dirty, try spraying a gentle electronics cleaner, like Omnicleanz, on a clean, lint-free cloth and wipe the device again. Never use any household cleaners, abrasives, or solvents unless you like your electronics like you like your eggs: fried.