lcd panel test made in china

One of today’s modern technological wonders is the flat-panel liquid crystal display (LCD) screen, which is the key component we find inside televisions, computer monitors, smartphones, and an ever-proliferating range of gadgets that display information electronically.What most people don’t realize is how complex and sophisticated the manufacturing process is. The entire world’s supply is made within two time zones in East Asia. Unless, of course, the factory proposed by Foxconn for Wisconsin actually gets built.

Liquid crystal display (LCD) screens are manufactured by assembling a sandwich of two thin sheets of glass.On one of the sheets are transistor “cells” formed by first depositing a layer of indium tin oxide (ITO), an unusual metal alloy that you can actually see through.That’s how you can get electrical signals to the middle of a screen.Then you deposit a layer of silicon, followed by a process that builds millions of precisely shaped transistor parts.This patterning step is repeated to build up tiny little cells, one for each dot (known as a pixel) on the screen.Each step has to be precisely aligned to the previous one within a few microns.Remember, the average human hair is 40 microns in diameter.

On the other sheet of glass, you make an array of millions of red, green, and blue dots in a black matrix, called a color filter array (CFA).This is how you produce the colors when you shine light through it.Then you drop tiny amounts of liquid crystal material into the cells on the first sheet and glue the two sheets together.You have to align the two sheets so the colored dots sit right on top of the cells, and you can’t be off by more than a few microns in each direction anywhere on the sheet.The sandwich is next covered with special sheets of polarizing film, and the sheets are cut into individual “panels” – a term that is used to describe the subassembly that actually goes into a TV.

For the sake of efficiency, you would like to make as many panels on a sheet as possible, within the practical limitations of how big a sheet you can handle at a time.The first modern LCD Fabs built in the early 1990s made sheets the size of a single notebook computer screen, and the size grew over time. A Gen 5 sheet, from around 2003, is 1100 x 1300 mm, while a Gen 10.5 sheet is 2940 x 3370 mm (9.6 x 11 ft).The sheets of glass are only 0.5 - 0.7 mm thick or sometimes even thinner, so as you can imagine they are extremely fragile and can really only be handled by robots.The Hefei Gen 10.5 fab is designed to produce the panels for either eight 65 inch or six 75 inch TVs on a single mother glass.If you wanted to make 110 inch TVs, you could make two of them at a time.

The fab is enormous, 1.3 km from one end to the other, divided into three large buildings connected by bridges.LCD fabs are multi-story affairs.The main equipment floor is sandwiched between a ground floor that is filled with chemical pipelines, power distribution, and air handling equipment, and a third floor that also has a lot of air handling and other mechanical equipment.The main equipment floor has to provide a very stable environment with no vibrations, so an LCD fab typically uses far more structural steel in its construction than a typical skyscraper.I visited a Gen 5 fab in Taiwan in 2003, and the plant manager there told me they used three times as much structural steel as Taipei 101, which was the world’s tallest building from 2004- 2010.Since the equipment floor is usually one or two stories up, there are large loading docks on the outside of the building.When they bring the manufacturing equipment in, they load it onto a platform and hoist it with a crane on the outside of the building.That’s one way to recognize an LCD fab from the outside – loading docks on high floors that just open to the outdoors.

LCD fabs have to maintain strict standards of cleanliness inside.Any dust particles in the air could cause defects in the finished displays – tiny dark spots or uneven intensities on your screen.That means the air is passed through elaborate filtration systems and pushed downwards from the ceiling constantly.Workers have to wear special clean room protective clothing and scrub before entering to minimize dust particles or other contamination.People are the largest source of particles, from shedding dead skin cells, dust from cosmetic powders, or smoke particles exhaled from the lungs of workers who smoke.Clean rooms are rated by the number of particles per cubic meter of air.A class 100 cleanroom has less than 100 particles less than 0.3 microns in diameter per cubic meter of air, Class 10 has less than 10 particles, and so on. Fab 9 has hundeds of thousands of square meters of Class 100 cleanroom, and many critical areas like photolithography are Class 10.In comparison, the air in Harvard Square in Cambridge, MA is roughly Class 8,000,000, and probably gets substantially worse when an MBTA bus passes through.

The Hefei Gen 10.5 is one of the most sophisticated manufacturing plants in the world.On opening day for the fab, BOE shipped panels to Sony, Samsung Electronics, LG Electronics, Vizio, and Haier.So if you have a new 65 or 75-inch TV, there is some chance the LCD panel came from here.

SEOUL (Reuters) - Chinese flat screen makers, once dismissed as second-class players in the global LCD market, are drawing envious looks from big names such as LG Display Co Ltd and Samsung.An employee works inside a LCD factory in Wuhan, Hubei province, May 8, 2013. REUTERS/China Daily

While the Korean giants were busy developing next-generation organic light emitting diode (OLED) TVs, little-known Chinese companies have started selling a type of display that are sharper than the standard LCD and cheaper than OLED.

Until last year, the UHD market had been almost non-existent, with just 33,000 sets sold in the 200 million-unit LCD TV market. Since then, shipments have soared around 20-fold, thanks to China, data from research firm IHS shows.

But its slow introduction into the market and austere prices have thrown open a window of opportunity for UHD makers, in this case Chinese companies like BOE Technology Group Co Ltd and TCL Corp’s LCD unit CSOT.

By comparison, Japanese flat-screen pioneer Sharp Corp reported a razor-thin 0.5 percent margin. LG Display, the world’s No.1 LCD maker, posted a 5.6 percent margin.

Samsung Display, a unit of Samsung Electronics, had a margin of 13 percent, the biggest in the industry. But excluding its fledging OLED business, its LCD margin is between 3 and 7 percent, according to a Bernstein forecast.

“Even with some expansion of the Chinese panel suppliers we do expect Samsung and LG Display to stay dominant and continue production in LCD,” said Sweta Dash, director at IHS.

BOE Technology is now planning to raise 46 billion yuan ($7.5 billion) in the biggest Chinese equity offering this year, to build panel production lines and increase its stake in its LCD venture BOE Display Technology.

Samsung Display will stop producing LCD panels by the end of the year. The display maker currently runs two LCD production lines in South Korea and two in China, according to Reuters. Samsung tells The Verge that the decision will accelerate the company’s move towards quantum dot displays, while ZDNetreports that its future quantum dot TVs will use OLED rather than LCD panels.

The decision comes as LCD panel prices are said to be falling worldwide. Last year, Nikkei reported that Chinese competitors are ramping up production of LCD screens, even as demand for TVs weakens globally. Samsung Display isn’t the only manufacturer to have closed down LCD production lines. LG Display announced it would be ending LCD production in South Korea by the end of the 2020 as well.

Last October Samsung Display announced a five-year 13.1 trillion won (around $10.7 billion) investment in quantum dot technology for its upcoming TVs, as it shifts production away from LCDs. However, Samsung’s existing quantum dot or QLED TVs still use LCD panels behind their quantum dot layer. Samsung is also working on developing self-emissive quantum-dot diodes, which would remove the need for a separate layer.

Samsung’s investment in OLED TVs has also been reported by The Elec. The company is no stranger to OLED technology for handhelds, but it exited the large OLED panel market half a decade ago, allowing rival LG Display to dominate ever since.

Although Samsung Display says that it will be able to continue supplying its existing LCD orders through the end of the year, there are questions about what Samsung Electronics, the largest TV manufacturer in the world, will use in its LCD TVs going forward. Samsung told The Vergethat it does not expect the shutdown to affect its LCD-based QLED TV lineup. So for the near-term, nothing changes.

One alternative is that Samsung buys its LCD panels from suppliers like TCL-owned CSOT and AUO, which already supply panels for Samsung TVs. Last year The Elec reported that Samsung could close all its South Korean LCD production lines, and make up the difference with panels bought from Chinese manufacturers like CSOT, which Samsung Display has invested in.

China is the leader in producing LCD display panels, with a forecast capacity share of 56 percent in 2020. China"s share is expected to increase in the coming years, stabilizing at 69 percent from 2023 onwards.Read moreLCD panel production capacity share from 2016 to 2025, by countryCharacteristicChinaJapanSouth KoreaTaiwan-----

DSCC. (June 8, 2020). LCD panel production capacity share from 2016 to 2025, by country [Graph]. In Statista. Retrieved January 21, 2023, from https://www.statista.com/statistics/1056470/lcd-panel-production-capacity-country/

DSCC. "LCD panel production capacity share from 2016 to 2025, by country." Chart. June 8, 2020. Statista. Accessed January 21, 2023. https://www.statista.com/statistics/1056470/lcd-panel-production-capacity-country/

DSCC. (2020). LCD panel production capacity share from 2016 to 2025, by country. Statista. Statista Inc.. Accessed: January 21, 2023. https://www.statista.com/statistics/1056470/lcd-panel-production-capacity-country/

DSCC. "Lcd Panel Production Capacity Share from 2016 to 2025, by Country." Statista, Statista Inc., 8 Jun 2020, https://www.statista.com/statistics/1056470/lcd-panel-production-capacity-country/

DSCC, LCD panel production capacity share from 2016 to 2025, by country Statista, https://www.statista.com/statistics/1056470/lcd-panel-production-capacity-country/ (last visited January 21, 2023)

LCD panel production capacity share from 2016 to 2025, by country [Graph], DSCC, June 8, 2020. [Online]. Available: https://www.statista.com/statistics/1056470/lcd-panel-production-capacity-country/

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China tested a nuclear-capable hypersonic missile in August that circled the globe before speeding towards its target, demonstrating an advanced space capability that caught US intelligence by surprise.

Five people familiar with the test said the Chinese military launched a rocket that carried a hypersonic glide vehicle which flew through low-orbit space before cruising down towards its target.

The missile missed its target by about two-dozen miles, according to three people briefed on the intelligence. But two said the test showed that China had made astounding progress on hypersonic weapons and was far more advanced than US officials realised.

Taylor Fravel, an expert on Chinese nuclear weapons policy who was unaware of the test, said a hypersonic glide vehicle armed with a nuclear warhead could help China “negate” US missile defence systems which are designed to destroy incoming ballistic missiles.

Fravel added that it would be “destabilising” if China fully developed and deployed such a weapon, but he cautioned that a test did not necessarily mean that Beijing would deploy the capability.

Two of the people familiar with the Chinese test said the weapon could, in theory, fly over the South Pole. That would pose a big challenge for the US military because its missiles defence systems are focused on the northern polar route.

The Chinese foreign ministry denied that China had tested a hypersonic missile. “This was a routine test of a space vehicle to verify technology of spacecraft’s reusability,” said Zhao Lijian, a spokesperson, without explaining why China did not announce the test at the time.

One Asian national security official said the Chinese military conducted the test in August. China generally announces the launch of Long March rockets — the type used to launch the hypersonic glide vehicle into orbit — but it conspicuously concealed the August launch.

Subsequent to publication of this story, the Financial Times learned that Beijing had conducted two hypersonic weapon tests, with the first occurring on July 27. The FT later published an account of both tests here

SEOUL, May 27 (Yonhap) -- China"s sweeping COVID-19 lockdowns are sending a shockwave in the display panel industry by exacerbating supply chain woes and parts procurement problems.

In April, global shipments of liquid crystal display (LCD) panels fell 15 percent from a year earlier amid the prolonged lockdowns in China, according to industry tracker Omdia.

China"s lockdowns have dealt a serious blow to the production of set products, which in turn is sending a ripple effect throughout the supply chain of parts, including display panels.

The company reported dismal first-quarter earnings last month, with its net income dropping nearly 80 percent from a year ago, on lower demand for IT products, falling TV panel prices and parts procurement difficulties.

Demand for LCD panels has been waning, as most countries have lifted pandemic restrictions and people spend less time at home and on personal IT devices. Enterprise demand has also been slower than expected, the company said, due to the hostile macro environment.

LG Display could "swing to loss in the second quarter for the first time in eight quarters, as LCD panel prices have continued to fall and sales of IT panels, the company"s core product line, fell more than 10 percent due to China"s COVID-19 situation," analyst Kwon Sung-ryul from DB Financial Investment wrote in his latest report.

This photo, provided by LG Display Co., shows Turkish-American artist Refik Anadol"s NFT collection, "An Important Memory for Humanity," on the panel maker"s transparent organic light-emitting diode. (PHOTO NOT FOR SALE) (Yonhap)

Attendees visit the booth of TV panel maker Shenzhen China Star Optoelectronics Technology during an international exhibition in Shanghai on July 11, 2019. [Photo by Lyu Liang/For China Daily]

Chinese companies have gained a competitive edge in the large-screen display industry and the exit of South Korean counterparts such as Samsung Electronics and LG Display from the liquid crystal display market will bring opportunities for China"s panel makers despite the challenges posed by the COVID-19 pandemic.

Market research firm Sigmaintell said BOE Technology Group Co Ltd－a leading Chinese supplier of display products and solutions－became the world"s largest shipper of LCD TV panels for the first time in 2019.

The Beijing-based company shipped 53.3 million units of LCD panels in 2019, with production capacity increasing by more than 20 percent on a yearly basis.

The consultancy said the LCD TV panel production area of Chinese manufacturers will account for more than 50 percent of the global total this year, surpassing South Korean competitors who are accelerating the shutdown of large-sized LCD panel production capacity due to competition from Chinese manufacturers.

It estimated the production capacity of large-sized LCD panels will continue to increase in China over the next three years. In addition, global LCD TV panel shipments stood at 283 million pieces last year, a slight decrease of 0.2 percent year-on-year. Meanwhile, the shipment area was 160 million square meters, an increase of 6.3 percent year-on-year.

"Chinese companies have gained an upper hand in large-screen LCD displays. Samsung and LG"s decision to exit from the LCD sector means Chinese panel makers will take a dominant position in this field," said Li Dongsheng, founder and chairman of Chinese tech giant TCL Technology Group Corp.

Li said South Korean firms will focus on organic LED screens and quantum dot LED displays, while Chinese TV panel makers are catching up at a rapid pace.

Data consultancy Digitimes Research said it comes as little surprise that Samsung has opted to withdraw from the LCD panel sector as its LCD business was losing money in every quarter of 2019 due to challenges from Chinese competitors.

BOE said its Gen 10.5 TFTLCD production line achieved mass production in Hefei, Anhui province, in March 2018. The plant mainly produces high-definition LCD screens of 65 inches and above. With a total investment of 46 billion yuan ($6.5 billion), the company"s second Gen 10.5 TFT-LCD production line launched operations in Wuhan, Hubei province, in December.

The Gen 11 TFT-LCD and active-matrix OLED production line of Shenzhen China Star Optoelectronics Technology, a subsidiary of TCL, officially entered operations in November 2018, producing 43-inch, 65-inch and 75-inch LCD screens.

Chen Lijuan, an analyst at Sigmaintell, said panel manufacturers should not just invest in production lines, but also pay more attention to the establishment of the whole supply chain, including raw materials, equipment and technology.

Bian Zheng, deputy director of research at AVC Revo, a unit of market consultancy firm AVC, said China will have a 51 percent market share in global TV shipments in 2020, while South Korea will have 25 percent, adding that large-screen TV panels will bolster healthy development of the industry.

Bian said the OLED and QLED will be the next-generation flat-panel display technologies to be in the spotlight. LG Display is currently the world"s only supplier of large-screen OLED TV panels.

OLED is a relatively new technology and part of recent display innovation. It has a fast response rate, wide viewing angles, super high-contrast images and richer colors. It is much thinner and can be made flexible, compared with traditional LCD display panels.

CASA GRANDE — As Pinal County residents begin to receive their at-home COVID test kits from the U.S. government as part of a nationwide testing push, some have noticed the kits have traveled a long way to get to the desert, possibly from across the Pacific Ocean.

“I cannot believe that we, the U.S. government, would be sending Chinese-made test kits to the American public,” said Casa Grande Mayor Craig McFarland, who received his at-home kits earlier this week. McFarland confirmed the brand he’d received was from the Chinese company iHealth.

Banner Casa Grande Medical Center CEO Brian Kellar said he too was surprised by the number of tests coming in that were made in China, but at the same time noted that China had taken the lead on global test kit manufacturing as they’ve had it as a priority for longer than other countries, including the U.S.

“Would American manufacturing be able to keep up with the demand for billions of tests?” Kellar said in a reply to McFarland’s email. “When despite subsidies we haven’t been able to do it for N95 masks? It seems to make sense the international manufacturing would be necessary.”

The federal government has made it a goal to mail out 500 million at-home COVID tests in the coming weeks; those tests include kits from iHealth Labs Inc., a division of the Chinese Company Andon Health Co. Ltd., which was contracted to provide the tests on Jan. 13. Andon’s contract was worth $1.28 billion and could supply 250 million, covering at least half of the federal government’s stated goal.

At least one prominent member of the conservative news media, Fox News anchor Bill Hemmer, complained on Tuesday about his free COVID tests being made in China.

According to the government’s test kit website, while tests are available for any residential address in the country, citizens will not be able to choose the exact brand of test kit they receive as part of the initiative.

The Chinese province that was the initial epicenter of the COVID-19 outbreak made significant purchases of equipment used to test for infectious diseases months before Beijing notified international authorities of the emergence of a new virus, according to research by a cybersecurity company.

The province’s purchase of PCR testing equipment, which allows scientists to amplify DNA samples to test for infectious disease or other genetic material, shot upward in 2019, with most of the increase coming in the second half of the year, the Australian-U.S. firm Internet 2.0 found.

Broken screen replacement service is provided from thousands of repairs stores and phone parts wholesalers worldwide, iPhone of which are mostly engaged in. So how to purchase reliable LCD screens among so many quality grades from China suppliers? Let me firstly elaborate on the quality grades of the iPhone LCD digitizer assembly that most repair stores and traders used to replace the broken ones.

According to the investigation, 90% of the Chinese iPhone LCD screen suppliers are found selling third-party manufactured screens and seldom sell genuine original LCD screens. Therefore, if your phone screen is broken, there would be a high chance for your screen to be replaced with a non-original one. Why? Maybe the cost and quality are relatively competitive, so why not?

As known, Foxconn is authorized to assemble iPhone, so there are some original iPhone LCD screens leaked from the assemble factory. And there are brought out from the factory for replacement. However the price is definitely high and still, some people care more about the quality of the screen than how much they cost, so for this group of customers, the Original Quality of LCD digitizer assemblies are preferred.

For some LCD digitizers, the LCDs are still working while the front glasses are broken, which can be recycled. Some factories recycled these broken screens by removing the broken front glass and attach a new one, then the LCD digitizer assembly would be new again, which is what called refurbished. Brand new original LCD screens are limited, and the refurbished ones can replenish the shortage of the new original LCD digitizer assemblies, for their quality would be more stable than the third-party manufactured.

Some Chinese factories purchase the original single LCD display, not compete LCD screen from the original factory, and then attach high copy front glass, backlight, etc, materials into a complete LCD screen, which quality is not stable and the display color is slightly different from the ones with high copy backlight. Well, their price would be cheaper and loved by many repair shops and wholesalers.

Under the shortage of original LCD screens, many Chinese factories begin to produce the high copy LCD screen. The stock and supply are getting less and less since about 2015, which leads the price goes higher and higher. Therefore the Chinese manufacturer starts to produce LCD screens with high copy raw materials. With competitive prices and good quality that meet most iPhone users’ needs, they are also popular among many wholesalers and repair shops.

With the premium quality of LCD and OLED screens tested strictly, we’ve helped many clients enlarge their markets worldwide. If you wholesale the LCD digitizer assembly or retail them in your repair shop, more information and sample are supported for your reference, please do not hesitate to contact us or leave your comment to discuss more.

Earlier, it was rumoured that Samsung was considering using screens made by Chinese firm BOE on their new smartphones. The change comes as it"s believed that BOE’s OLED panels are cheaper than Samsung’s in-house screens. However, it is reported that the panels supplied by BOE couldn"t make it to become the screens of the next Galaxy S series as they have failed in quality tests.

According to the source, it"s said that the panels are usually installed on a phone after they pass quality testing and mass-production testing. Sadly, BOE’s screens have been defeated in the first round before they make their way to being installed on the Samsung Galaxy S30/S21. However, it"s suggested that there’s still time for the panel to pass the testing. On the other side, a display insider Ross Young has tweeted that both screen manufacturers BOE and China Star have “failed to get into Samsung”, this could be signaling that the company has already rejected the alternatives to Samsung display.

TAIPEI, Taiwan (AP) — Most access to a major city adjacent to Beijing was suspended Thursday as China tried to contain an outbreak of the highly contagious omicron variant, which poses a test to its “zero-tolerance” COVID-19 policy and its ability to successfully host the Winter Olympics.

On Thursday, Tianjin suspended train, taxi, bus and ride-hailing services to other cities. Flights and high-speed train services were canceled earlier and highways closed. People leaving the city were required to present negative virus tests and receive special permission.

Along with mass testing and digital surveillance of people’s movements, those measures have kept the virus from spreading into a full-fledged national outbreak so far. The country’s vaccination rate now also tops 85%.

Tianjin conducted mass testing for a second time Wednesday. The government asked people to wait at home until they receive a negative result, and communities in Beijing asked their residents to report if they’ve visited the nearby port city in recent weeks.

Automaker Volkswagen AG said it shut down two factories in the city on Monday and employees have been tested twice. “We hope to resume production very soon,” it said in a statement.