Flat panel display is an electronic display technology used to enable people to view content (still images, moving images, text or other visual materials) in entertainment, consumer electronics, personal computers and mobile devices, and many kinds of medical equipment, transportation and industry. They are much lighter and thinner than the traditional cathode ray tube television sets (CRTs) and video screens and are typically less than 10 cm (3.9 inches) thick. The flat panel display can be divided into two categories of display devices: volatile and static. Flashing displays require that pixels be periodically updated electronically to maintain their status (for example, a liquid crystal display (LCD)). Unstable display only shows images when it has battery power or AC power. Static flat-panel displays depend on materials with paltable color status (e.g., e-book reader tablets from Sony), and thus, flat panel displays saving text or images on the screen even when the power is off. In 2016, flat panel displays almost completely replace the old CRT display. In many applications of the 2010 era, especially small portable devices such as laptops, mobile phones, smartphones, digital cameras, camcorders, snapshots, and pocket video cameras, any flat panel display losses (compared to CRTs) are made for the benefit of portability (thin and light).
Most 2010 flat panel displays use LCD and/or LED technology. Most LCD screens are lit because color filters are used to display colors. The flat panel display is thinner and lighter and provides better linearity and they are capable of higher resolution than consumer-grade TVs in general from previous eras. The highest resolution for consumer-grade CRT TVs is 1080i; Conversely, many flat panels can display 1080p or even 4K resolution. Starting in 2016, some flat panel devices, such as tablet computers, smartphones and, more rarely, laptops, use touch screens, a feature that lets users select icons on the screen or trigger an action (for example, play digital video) by touching the screen. Many touch screen devices can display a virtual QWERTY or numeric keyboard on the screen, to allow users to type in words or numbers.
The multifunctional monitor ( MFM ) is a flat-panel display that has additional video input (over a regular LCD monitor) and is designed for use with a variety of external video sources, such as VGA input, HDMI from a VHS VCR or video game console and, in some cases, a USB input or a card reader for viewing digital photos). In many instances, MFM also includes a TV tuner, making it similar to an LCD TV that offers computer connectivity.
Video Flat panel display
History
The first technical proposal for flat-screen TV was by General Electric as a result of its work on radar monitors. The publication of their findings provides all the basics of flat-panel TVs and monitors in the future. But GE does not continue with R & amp; D required and never built a functioning flat panel at that time. The first flat-screen production line was the Aiken tube, developed in the early 1950s and produced in limited numbers in 1958. It saw some use in military systems as a head display, but conventional technology surpassed its development. Attempts to commercialize the system for home television use have continued problems and the system has never been released commercially. The Philco Predicta features a relatively flat cathode ray tube setup (for today) and will be the first commercially launched "flat panel" after launch in 1958; Predicta is a commercial failure. The plasma screen panel was discovered in 1964 at the University of Illinois, according to The History of Plasma Display Panels. The first active-matrix display was made by T Peter Brody's Thin-Film Devices department at Westinghouse Electric Corporation in 1968. In 1977, James P Mitchell prototyped and then demonstrated what may be the earliest monochromatic flat panel LED display LED. In 2012, 50% of global market share in flat screen production (FPD) is produced by Taiwanese manufacturers such as AU Optronics and Chimei Innolux Corporation.
Maps Flat panel display
General type
Liquid crystal display
Liquid crystal display (LCD) is lightweight, compact, portable, inexpensive, more reliable, and more visible than cathode-ray tube displays. The LCD screen uses a thin layer of liquid crystals, a liquid that exhibits the properties of crystals. It's sandwiched between two electroplates. The top plate has a transparent electrode stored on it, and the back plate lights up so viewers can see the image on the screen. By applying controlled electrical signals throughout the plates, various segments of liquid crystals can be activated, causing changes in their diffused light or property polarization. This segment can send or block light. An image is generated by passing light through the selected liquid crystal segment to the viewer. They are used in various electronics such as watches, calculators, and notebook computers.
The liquid crystal display with a backlit light (LED) lamp illuminates
Some backlit LCD displays with a number of light-emitting diodes (LEDs). The LED is a two-way semiconductor light source that resembles a basic "pn-junction" diode, except that the LED also emits light. This form of LCD (liquid crystal display) is the most common in the 2010s. The image is still generated by the LCD.
Plasma panel
The plasma screen consists of two glass plates separated by a thin slit filled with a fluorescent-like gas. Each of these plates has several parallel electrodes that cross them. Electrodes on two plates face each other. The applied voltage between two electrodes one in each plate causes the small gas segment in the two electrodes to ignite. The glow gas segment is maintained by a lower voltage which continues to be applied to all electrodes. In 2010, plasma displays have been discontinued by many manufacturers.
Electroluminescent Panel
In the electroluminescent (ELD) display, the image is made by applying an electrical signal to the plate that makes the phosphor glow.
Organic light-emitting diode
An OLED (organic light-emitting diode) is a light-emitting diode (LED) in which the emitting electroluminescent layer is a film of organic compounds that emit light in response to an electric current. This organic semiconductor layer is located between two electrodes; usually, at least one of these electrodes is transparent. OLED is used to create digital displays on devices such as television screens, computer monitors, portable systems like mobile phones, handheld game consoles, and PDAs. The main field of research is the development of white OLED devices for use in solid-state lighting applications. [1] [2] [3]
Quantum dot light emitting diode
QLED-QLED or Quantum Dot LED is a flat panel display technology introduced by Samsung under this trademark. Other television manufacturers such as Sony have used the same technology to increase LCD Television backlights in 2013. Quantum dots create their own unique light when illuminated by light sources with shorter wavelengths such as blue LEDs. The type of LED TV introduced by Samsung increases the color of the LCD panel, in which the image is still generated by the LCD. In the Samsung view, the quantum dot display for large screen TVs is expected to be more popular than OLED displays in the coming years. This is surprising because Samsung Galaxy devices such as smartphones are mainly equipped with OLED screens manufactured by Samsung as well. Samsung stated on their website that the QLED TV they produce can determine which parts of the screen require more or less contrast. Samsung also announced a partnership with Microsoft that will promote the new Samsung QLED TV.
Volatile
Flashing views require pixels to be periodically refreshed to maintain their status even for static images. Thus, a volatile screen requires electrical power, either from mains electricity (plugged into wall outlet) or batteries to keep the image on screen or change the image. This refresh usually occurs several times in one second. If this is not done, for example, if there is a power outage, the pixel will gradually lose its coherent status, and the image will "fade" from the screen.
Example
The following flat screen technologies have been commercialized in the 1990s through the 2010s:
- Plasma display panel (PDP)
- Active-matrix liquid crystal display (AMLCD)
- Rear projection: Digital Light Processing (DLP), LCD, LCOS
- Electronic paper: E Ink, Gyricon
- Light-emitting diode (LED) display
- Active active light-emitting diode active (AMOLED)
- Quantum dot view (QLED)
The technology under study extensively, but their commercialization is limited or ultimately ignored:
- Active Electroluminescent matrix display (ELD)
- Display interferometry modulator (IMOD)
- Field emission view (FED)
- Electron-emitter electro-conduction display (SED, SED-TV)
Static
The static flat-panel display depends on the material whose color status can be dimmed. This means that the image they hold does not require energy to be maintained, but instead requires energy to change. This results in a more energy-efficient display, but with a tendency towards undesirable slow refresh rates in an interactive display. The playable flat panel display starts to be used in restricted applications (Cholesteric screen, manufactured by Magink, in outdoor advertising; electrophoretic display in e-book reader devices from Sony and iRex; anlabels).
See also
- Computer monitor
- Show motion blur
- Electronic paper
- FPD-Link
- Flexible view
- Large screen television technology
- LCD TV with LED backlight
- Mobile view
- Sony Watchman
- 3D stereoscopy display that does not require special glasses
- Touch pad
- Transparent screen
References
External links
- Central TFT, flat panel monitor review, news and articles
- LED display, LED display system in China
- Finetech Japan, FDP exhibition and conference
- Features: Strange Inventions You Never Know About
Source of the article : Wikipedia
0 Comments