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LCD (LED) and OLED TV

Google Urges Vigilance: Unsecure Android TV OS Boxes Pose Security Risks

Android TV OS Boxes Android TV OS Boxes According to researchers, several common low-cost Android TV devices and dongles already have malware pre-installed. Here’s a simple guide on how to determine whether your Android TV OS device is authorized and covered by Google Play Protect. In the past several years, Android TV boxes have experienced tremendous growth in popularity. Android TV OS Boxes Security experts have lately revealed that many highly regarded Android TV set-top boxes and dongles available on websites like Amazon come pre-installed with malware. Android TV OS Boxes The majority of these products, according to Google, are branded as Android TV OS-powered boxes, although they were really constructed using the Android Open Source Project, and some even include Google apps and the Play Store without a Google license. However, just because a set-top box or dongle ships with Android TV doesn’t imply Google has approved it. The tech giant recognized the problem and provided instructions on how to determine whether your device was created with the Android TV OS and is Play Protect certified. Make sure the manufacturer is listed on the Android TV website under the ‘Global Partners’ section if you are considering buying an Android TV. Check the Google Play Protect status if the device isn’t shown for whatever reason. How to use Android TV to check Google Play Protect status Simply launch the Google Play Store on your Android TV and press the profile symbol in the upper right corner of the screen to get started. Now, Android TV OS Boxes navigate to “Settings,” choose “About,” and select the “Play Protect” option. You may check here to see if Google has approved the Android TV or not. In the absence of certification, the device may not be secure and may not receive Android system or app upgrades since Google doesn’t have a record of the Android compatibility test results. CONTACT US

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Diode

Diode   What is diodes explain- A diodes is a semiconductor device that essentially acts as a one-way switch for current. It allows current to flow easily in one direction, but severely restricts current from flowing in the opposite direction.BY www.ledihatv.com What is diodes and types? A diode is a two terminal electrical device. Diodes are made from a semiconductor, most often silicon but sometimes germanium. There are various types of diodes, but the ones being discussed here are Zener, Rectifier, Schottky, Transient Voltage Suppressor, Thyristor, Silicon Controlled Rectifier, and TRIAC. BY www.ledihatv.com   Why are diodes used? Diodes are used in circuit protection due to their ability to restrict electrical current to flow in only one direction. This trait is useful because some electrical components and devices will be damaged or malfunction if current flows in the wrong direction. BY www.ledihatv.com Is diode convert AC to DC? The diodes allows the current to pass only in one direction. If the diodes are used in AC it will conduct only during half of the cycle. Thus they are used in the conversion of AC into DC. Hence, diodes are DC. What Is a Diodes? Diodes are used to protect circuits by limiting the voltage and to also transform AC into DC. Semiconductors like silicon and germanium are used to make the most of the diodes. Even though they transmit current in a single direction, the way with which they transmit differs. There are different kinds of diodes and each type has its own applications. BY www.ledihatv.com Diodes Symbol A standard diodes symbol is represented as above. In the above diagram, we can see that there are two terminals that are known as anode and cathode. The arrowhead is the anode that represents the direction of the conventional current flow in the forward biased condition. The other end is the cathode. Diodes Construction Diodes can be made of either of the two semiconductor materials, silicon and germanium. When the anode voltage is more positive than the cathode voltage, the diodes is said to be forward-biased, and it conducts readily with a relatively low-voltage drop. Likewise, when the cathode voltage is more positive than the anode, the diodes is said to be reverse-biased. The arrow in the diodes symbol represents the direction of conventional current flow when the diodes conducts. This article lets you understand in detail about various types of diodes. Diodes:-Types Light Emitting Diodes Laser diodes Avalanche diodes Zener diodes Schottky diodes Photodiodes PN junction diodes Light Emitting Diodes (LED) When an electric current between the electrodes passes through this diodes, light is produced. In other words, light is generated when a sufficient amount of forwarding current passes through it. In many diodes, this light generated is not visible as there are frequency levels that do not allow visibility. LEDs are available in different colours. There are tricolour LEDs that can emit three colours at a time. Light colour depends on the energy gap of the semiconductor used. Laser Diodes It is a different type of diode as it produces coherent light. It is highly used in CD drives, DVDs and laser devices. These are costly when compared to LEDs and are cheaper when compared to other laser generators. Limited life is the only drawback of these diodes. Avalanche Diodes This diode belongs tso a reverse bias type and operates using the avalanche effect. When voltage drop is constant and is independent of current, the breakdown of avalanche takes place. They exhibit high levels of sensitivity and hence are used for photo detection. Zener Diodes It is the most useful type of diode as it can provide a stable reference voltage. These are operated in reverse bias and break down on the arrival of a certain voltage. If current passing through the resistor is limited, a stable voltage is generated. Zener diodes are widely used in power supplies to provide a reference voltage. Schottky Diodes It has a lower forward voltage than other silicon PN junction diodes. The drop will be seen where there is low current and at that stage, voltage ranges between 0.15 and 0.4 volts. These are constructed differently in order to obtain that performance. Schottky diodes are highly used in rectifier applications. Photodiodes A photo-diode can identify even a small amount of current flow resulting from the light. These are very helpful in the detection of the light. This is a reverse bias diode and used in solar cells and photometers. They are even used to generate electricity. P-N Junction Diode The P-N junction diode is also known as rectifier diodes. These diodes are used for the rectification process and are made up of semiconductor material. The P-N junction diode includes two layers of semiconductors. One layer of the semiconductor material is doped with P-type material and the other layer with N-type material. The combination of these both P and N-type layers form a junction known as the P-N junction. Hence, the name P-N junction diode. Diode P-N junction diode allows the current to flow in the forward direction and blocks the flow of current in the reverse direction. Related Articles: How do Diodes Work as a Rectifier? Zener Diodes as a Voltage Regulator Laser Diodes Light Emitting Diode (LED) Zener diodes Schottky diodes Characteristics of Diode The following are the characteristics of the diode: Forward-biased diodes Reverse-biased diodes Zero biased diodes

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mumbai

mumbai Mumbai ,(formerly called Bombay) is a densely populated city on India’s west coast. A financial center, it’s India’s largest city. On the Mumbai Harbour waterfront stands the iconic Gateway of India stone arch, built by the British Raj in 1924. Offshore, nearby Elephanta Island holds ancient cave temples dedicated to the Hindu god Shiva. The city’s also famous as the heart of the Bollywood film industry. ― by Google https://ledihatv.com Early history     Kanheri Caves contain Buddhist sculptures and paintings dating from the 1st century CE to the 10th century CE. Mumbai is built on what was once an archipelago of seven islands: Isle of Bombay, Parel, Mazagaon, Mahim, Colaba, Worli, and Old Woman’s Island (also known as Little Colaba). It is not exactly known when these islands were first inhabited. Pleistocene sediments found along the coastal areas around Kandivali in northern Mumbai suggest that the islands were inhabited since the South Asian Stone Age. Perhaps at the beginning of the Common Era, or possibly earlier, they came to be occupied by the Koli fishing community. In the 3rd century BCE, the islands formed part of the Maurya Empire, during its expansion in the south, ruled by the Buddhist emperor Ashoka of Magadha.The Kanheri Caves in Borivali were excavated from basalt rock in the first century CE,and served as an important centre of Buddhism in Western India during ancient Times. The city then was known as Heptanesia (Ancient Greek: A Cluster of Seven Islands) to the Greek geographer Ptolemy in 150 CE. The Mahakali Caves in Andheri were cut out between the 1st century BCE and the 6th century CE.[68][69] Between the 2nd century BCE and 9th century CE, the islands came under the control of successive indigenous dynas: Satavahanas, Western Satraps, Abhira, Vakataka, Kalachuris, Konkan Mauryas, Chalukyas and Rashtrakutas, before being ruled by the Shilaharas from 810 to 1260.Some of the oldest edifices in the city built during this period are the Jogeshwari Caves (between 520 and 525), Elephanta Caves (between the sixth to seventh century), Walkeshwar Temple (10th century), and Banganga Tank (12th century). The Haji Ali Dargah was built in 1431, when Mumbai was under the rule of the Gujarat Sultanate. King Bhimdev founded his kingdom in the region in the late 13th century and established his capital in Mahikawati (present day Mahim).The Pathare Prabhus, among the earliest known settlers of the city, were brought to Mahikawati from Saurashtra in Gujarat around 1298 by Bhimdev. The Delhi Sultanate annexed the islands in 1347–48 and controlled it until 1407. During this time, the islands were administered by the Muslim Governors of Gujarat, who were appointed by the Delhi Sultanate. The islands were later governed by the independent Gujarat Sultanate, which was established in 1407. The Sultanate’s patronage led to the construction of many mosques, prominent being the Haji Ali Dargah in Worli, built in honour of the Muslim saint Haji Ali in 1431 From 1429 to 1431, the islands were a source of contention between the Gujarat Sultanate and the Bahmani Sultanate of Deccan. In 1493, Bahadur Khan Gilani of the Bahmani Sultanate attempted to conquer the islands but was defeated. by

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Oled tv

Oled tv Ledihatv.com OLED stands for organic light-emitting diode and is one of the newer technologies available for TVs and other digital displays. OLED is what technology professionals call an “emissive” technology because it uses millions of pixels that emit their own light rather than relying on a separate backlight. What are the disadvantages of OLED TV? The Cons of OLED TVs OLED TVs Have Average Brightness Levels. … OLED TVs Are Susceptible to Burn-Ins. … OLED TVs Can’t Match QLEDs in Color Volume. … OLEDs Pale in Comparison to MicroLED Technology. LG OLED‑C9 Sony Samsung Hisense TCL Panasonic OLED TV is a television display technology based on the characteristics of organic light-emitting diodes (OLED). OLED TV is a different technology than LED TV. The OLED display is based an organic substance used as the semiconductor material in light-emitting diodes (LEDs). The display is created by sandwiching organic thin films between two conductors. When an electrical current is applied to this structure, it emits a bright light. Because OLED displays don’t require backlighting, they can be thinner and weigh less than other display technologies. OLED displays also have a wide viewing angle — up to 160 degrees even in bright light — and use only two to ten volts to operate. What is an OLED TV? OLED stands for organic light-emitting diode and is one of the newer technologies available for TVs and other digital displays. OLED is what technology professionals call an “emissive” technology because it uses millions of pixels that emit their own light rather than relying on a separate backlight. Is OLED owned by LG? LG Electronics announced its OLED TV range for 2023. LG is introducing several new technologies, one of which is microlens array (or MLA) to achieve up to 2,100 nits (in the G3 series). The entry-level model is the A3 series, which offers 4K 60Hz 48-inch, 55-inch, 65-inch and 77-inch WOLED panels. Like all types of OLED, phosphorescent OLEDs emit light due to the electroluminescence of an organic semiconductor layer in an electric current. Electrons and holes are injected into the organic layer at the electrodes and form excitons, a bound state of the electron and hole. Electrons and holes are both fermions with half integer spin. An exciton is formed by the coulombic attraction between the electron and the hole, and it may either be in a singlet state or a triplet state, depending on the spin states of these two bound species. Statistically, there is a 25% probability of forming a singlet state and 75% probability of forming a triplet state.[2][3] Decay of the excitons results in the production of light through spontaneous emission. Applications In OLEDs using fluorescent organic molecules only, the decay of triplet excitons is quantum mechanically forbidden by selection rules, meaning that the lifetime of triplet excitons is long and phosphorescence is not readily observed. Hence it would be expected that in fluorescent OLEDs only the formation of singlet excitons results in the emission of useful radiation, placing a theoretical limit on the internal quantum efficiency (the percentage of excitons formed that result in emission of a photon) of 25%.[4] However, phosphorescent OLEDs generate light from both triplet and singlet excitons, allowing the internal quantum efficiency of such devices to reach nearly 100%.[5] Oled tv This is commonly achieved by doping a host molecule with an organometallic complex. These contain a heavy metal atom at the centre of the molecule, for example platinum[6] or iridium, of which the green emitting complex Ir(mppy)3 is just one of many examples.[1] The large spin–orbit interaction experienced by the molecule due to this heavy metal atom facilitates intersystem crossing, a process which mixes the singlet and triplet character of excited states. This reduces the lifetime of the triplet state,[7][8] therefore phosphorescence is readily observed.

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led tv repair shop

led tv repair shop Care num -777 007 4243 how to care led tv at home .. Led tv repair shop Turn the TV off and let it cool down for a few minutes before unplugging it. To clean the frame and screen, gently wipe it with a microfiber cleaning cloth. Make sure to wipe the TV frame and screen as gently as possible. TV screens are fragile and can be damaged when pressed too hard. Your best bet is to use a soft, anti-static microfiber cloth—the kind used to clean eyeglasses and camera lenses—and wipe in a circular motion,” says ledihatv, who cleans more than 250 TVs a month in his role as a led tv . (Some TV manufacturers will include a cloth for this purpose.) Fortunately, cleaning your flat-screen TV is a straightforward process that doesn’t require any pricey chemicals. While you’re at it, also pay attention to the remote controls for your TVs, cable boxes, and streaming players. These get handled much more than TVs and harbor pathogens along with plain old grime. We have advice for cleaning both TVs and remotes below. When it comes to TVs, the current market is dominated by super bright, big-screen LCD (LED) and OLED TVs. However, many of us still have older sets, including plasma TVs, which companies stopped manufacturing in 2014, and even CRTVs—also called tube TVs—which started disappearing around 2005. If you’re cleaning an older tube TV, you have a bit more flexibility because its screen is made of glass and can be cleaned like other glass items in your household. In this—and only this—instance, it’s okay to use a window cleaner, such as Windex. led tv repair shop More modern TVs are far more sensitive and need to be cleaned carefully to keep the screens from getting scratched or damaged. Plasma TVs also have glass screens, but manufacturers often applied a sensitive anti-glare coating, so they should be treated like an LCD or OLED TV rather than a CRTV set. For all these TVs, the advice is the same, and it’s simple: Clean with a soft, dry cloth to avoid scratching the screen. In all cases, turn off the TV—or even unplug it—prior to cleaning, says Claudio Ciacci, who heads Consumer Reports’ TV testing program. “In addition to it being safer for the set, it’s usually easier to see dirt or finger smudges when the screen is dark,” he says. “It also gives the TV a chance to cool down.” If you have any doubts about which type of TV you have, you can always consult the owner’s manual. Most manuals and manufacturer websites have instructions for the best way to clean their sets. Here are all our tips for cleaning your flat-screen TV. Start With a Dry, Soft Cloth Screens can scratch easily, and even paper towels and tissues contain fibers that can do damage. “Your best bet is to use a soft, anti-static microfiber cloth—the kind used to clean eyeglasses and camera lenses—and wipe in a circular motion,” says John Walsh, who cleans more than 250 TVs a year in his role as a CR photographer. (Some TV manufacturers will include a cloth for this purpose.) “Gently wipe the screen with a dry cloth to remove dust and other debris, but don’t press too hard,” he says. You may also want to wipe down the TV’s cabinet, and make sure dust isn’t clogging the vents that help dissipate heat. If the TV is on a stand and not tethered to the wall, Walsh suggests cleaning with one hand while supporting the TV with the other to prevent the set from tipping over. However, CR strongly recommends anchoring all stand-mounted TVs using anti-tipping straps designed for this purpose. led tv repair shop-lediha tv If there are hard-to-remove stains, you can dampen the cloth slightly with distilled water and gently clean the screen. Don’t spray water directly onto the screen; that could cause a shock or component failure if water seeps into the inner workings of the set. For the most stubborn stains, you can try using a solution of very mild dish soap highly diluted with water, once again applied to the cloth and not to the TV itself. (As a guideline, Panasonic used to recommend a 100:1 ratio of water to soap.) LCD screens, in particular, are very sensitive to pressure and can scratch easily, so don’t press hard. Walsh suggests that if you do use a dampened cloth, go over the screen one more time with a dry one to remove any swirls or streaks. Avoid Harmful Chemicals Alcohol and ammonia, found in window cleaners such as Windex, can wreak havoc on your expensive flat-screen TV, so don’t use cleaners that have them. If you decide to use a packaged “screen cleaner”—which you don’t really need (see below)—choose one that doesn’t contain alcohol, ammonia, or acetone. Also, don’t use any cleaners that contain an abrasive that can scratch the screen. Skip the Cleaning Kit Some of these kits cost $15 to $20 for just a microfiber cloth and a small bottle of cleaning solution, which is probably mostly water. Instead, buy the cloth at an office supply store or online and use distilled water, or a solution of your own making per our advice above. If you opt for a kit, make sure it doesn’t contain harmful chemicals. Don’t Forget the Remote Control Remote controls can get dusty and also harbor a fair number of germs. Think of how many fingers have pressed the buttons on that remote recently and whether all of them were squeaky clean. Then there’s the issue of coughs and sneezes. Here’s some basic advice about cleaning your remote controls. We also have more details on how to sanitize your remote control if you’re really worried about spreading viruses. Remove the batteries before you start cleaning. Then start by turning the remote upside down so that the buttons are facing downward, and tap the remote against your palm to dislodge any debris that might have fallen

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