Tft 'sworld History

Posted : admin On 13.09.2021

A wristwatch TV is one of a new generation of electronic devices designed to be worn on the user's body. Presently, the wristwatch TV models available are not the mythical 'two-way communicators' featured in Dick Tracy's world, but they are a vast improvement over earlier attempts to miniaturize television sets. A new electronic component called a Thin Film Transistor (TFT) uses Liquid Crystal Display (LCD) technology to replace the bulky cathode ray tube found in traditional television sets.

The concept of a wristwatch TV is not as new as some may think. Back in 1982, the Japanese watch and electronics company Seiko released what was considered to be the world's smallest television set. To emphasize the portability feature, Seiko designed a watch band capable of supporting this wristwatch TV system.

Unfortunately, the initial market price was prohibitive -- close to $1000 USD when expressed in 2005 inflation-adjusted terms. The black & white TV screen provided a low-quality picture, but the audio quality was acceptable. With few buyers and a laundry list of technical restrictions, Seiko's entry into the wristwatch TV market was withdrawn after a few years. Reddit hyken chair covers. It can be glimpsed, however, as one of the high-tech gadgets in the James Bond film Octopussy.

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As television technology advanced from the bulky cathode ray tube to the LCD and plasma screens of today, the idea of a practical wristwatch TV was revived by the Japanese company NHJ. Using the same TFT system as full-size LCD displays, NHJ has developed one of the first color wristwatch TV sets available to consumers. TFT uses a series of liquid crystals which react to electronic impulses by changing intensity and color. These liquid crystals are sandwiched between two transparent sheets which deliver electronic signals to duplicate television transmission signals.

The wristwatch TV developed by NHJ features a 1 inch (2.54 cm) by 1.5 inch (approximately 3.25 cm) color screen, along with a digital watch display. A special lithium polymer battery provides up to one hour of power between three hour recharging cycles. The earpiece attachment also doubles as the antenna wire, which can tune in VHF and UHF signals in the area. Reception is variable, based on the signal strength of the broadcasting station and the location of the user.

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Some may wonder about the practical uses of a wristwatch TV. Those who are temporarily cut off from civilization might benefit from local news and weather broadcasts. Wearers might also be able to watch a favorite television show while on a lunch break at work. A wristwatch TV could prove useful in waiting rooms or on long commutes to work. Sports fans can watch the end of a game as they perform chores or change locations. The NHJ wristwatch TV can also be linked directly to an AC adapter, providing up to three more hours of television viewing.

The initial list price of an NHJ wristwatch is a surprising $200 USD, much more affordable than the Seiko model of yesteryear. Although mobile phone systems are beginning to feature their own color television systems, a wristwatch TV does not require a service contract or access to communication towers to work.

You undoubtedly use computer monitors daily, whether at work, at home or both. So, you know that they are available in a variety of shapes, designs, and colors. What a lot of people might not know is, based on the technology used to make them, they can be broadly categorized into three types commonly used today.

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CRT (cathode ray tube) monitors

These monitors employ CRT technology, which was used most commonly in the manufacturing of television screens. With these monitors, a stream of intense high energy electrons is used to form images on a fluorescent screen. A cathode ray tube is basically a vacuum tube containing an electron gun at one end and a fluorescent screen at another end.

While CRT monitors can still be found in some organizations, many offices have stopped using them largely because they are heavy, bulky, and costly to replace should they break. While they are still in use, it would be a good idea to phase these monitors out for cheaper, lighter, and more reliable monitors.

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LCD (liquid crystal display) monitors

The LCD monitor incorporates one of the most advanced technologies available today. Typically, it consists of a layer of color or monochrome pixels arranged schematically between a couple of transparent electrodes and two polarizing filters. Optical effect is made possible by polarizing the light in varied amounts and making it pass through the liquid crystal layer. The two types of LCD technology available are the active matrix of TFT and a passive matrix technology. TFT generates better picture quality and is more secure and reliable. Passive matrix, on the other hand, has a slow response time and is slowly becoming outdated.

The advantages of LCD monitors include their compact size which makes them lightweight. They also don’t consume much electricity as CRT monitors, and can be run off of batteries which makes them ideal for laptops.

Images transmitted by these monitors don’t get geometrically distorted and have little flicker. However, this type of monitor does have disadvantages, such as its relatively high price, an image quality which is not constant when viewed from different angles, and a monitor resolution that is not always constant, meaning any alterations can result in reduced performance.

LED (light-emitting diodes) monitors

LED monitors are the latest types of monitors on the market today. These are flat panel, or slightly curved displays which make use of light-emitting diodes for back-lighting, instead of cold cathode fluorescent (CCFL) back-lighting used in LCDs. LED monitors are said to use much lesser power than CRT and LCD and are considered far more environmentally friendly.

The advantages of LED monitors are that they produce images with higher contrast, have less negative environmental impact when disposed, are more durable than CRT or LCD monitors, and features a very thin design. They also don’t produce much heat while running. The only downside is that they can be more expensive, especially for the high-end monitors like the new curved displays that are being released.

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Being aware of the different types of computer monitors available should help you choose one that’s most suited to your needs. Looking to learn more about hardware in today’s world? Contact us and see how we can help.