dust inside lcd screen made in china

Repair guides can be hard to find. I"ve only seen guides for iMac but the general idea is the same. Remove the LCD assembly from the housing, remove the fixture tapes and side frames from the assembly, lift the panel and clean it. It seems that soft cloth is enough to clean the panels. Be aware of additional dust when wiping the panels and wipe gently, you may scarch the panel in the process if not careful enough. Make sure you seal the assembly well to prevent further dust.

It IS a very difficult repair, the assembly is very heavy, maybe more than 2/3 of the unit"s total weight, and it is a fragile piece of art. Several cables and sensors attach to the back side of the panel. You can easily damage them when lifting the LCD. There are many clips locking the frame. Quite tricky to remove. And at last the LCD driver board is connected to the panel by several ribbon cables. You must not tear any one of them or the entire unit is totaled. In conclusion, very challenging to do so.

Chemicals leaking from millions of computer screens in homes, offices and schools could damage human health, according to research by Chinese scientists.

Chemistry professor Su Guanyong and colleagues at Nanjing University of Science and Technology in eastern Jiangsu province studied more than 360 types of chemicals used in computer and mobile phone screens and found that 87 of them could be a danger if they got into the environment.

Some chemicals in liquid crystal displays (LCDs) could alter genes, they said. Animal cells mutated unexpectedly if exposed, and preliminary results of their ongoing study published in Proceedings of the National Academy of Sciences on Monday showed that one of the most polluted places was the home.

Researchers said about a quarter of the chemicals from screens they tested might be pollutants. Photo: Getty alt=Researchers said about a quarter of the chemicals from screens they tested might be pollutants. Photo: Getty

Studies found that excessive radiation from screens could speed up the ageing of skin and blue light from diodes could harm the retina of the eye. "But nobody has looked beyond the brightness to unveil the dark secrets behind," Su said.

Over the years, screen panel manufacturers have pushed LCD technology to higher resolutions and faster refreshing rates, but the chemical composition of the liquid crystal that fills their screens has hardly changed.

Smartphones mean booming demand for components such as screens. Photo: Ben Sin alt=Smartphones mean booming demand for components such as screens. Photo: Ben Sin

They exposed embryonic chicken cells to liquid crystal taken from the screens and compared them to cells grown in normal conditions. They found genetic changes that suggested the exposed cells had mutated.

The Nanjing team was baffled by the amount of liquid crystal in the air. They knew screens were made in dust-free factories and sealed, but their surveys of hotels, school buildings, canteens, dormitories, electronic product repair centres, homes and laboratories revealed surprising results.

Scientists say cracked screens and leaking chemicals are a worldwide problem. Photo: Shutterstock alt=Scientists say cracked screens and leaking chemicals are a worldwide problem. Photo: Shutterstock

The lowest levels were found in a canteen, a dormitory and classrooms. Su said they were not sure where the drifting liquid crystals came from. Some screens might have been cracked or broken, he said. If a screen was left on for a long time, heat and radiation might cause liquid crystal to evaporate.

"Electric device recycling plants could be a major source of emissions, with broken screens dumped everywhere and little protection. This practice must stop," he said.

The international research team, led by USask environmental toxicologist John Giesy, is sounding the alarm about liquid crystal monomers--the chemical building blocks of everything from flat screen TVs to solar panels--and the potential threat they pose to humans and the environment.

In a first-of-its-kind paper published, Giesy"s research team assembled and analyzed a comprehensive list of 362 commonly used liquid crystal monomers gathered from 10 different industries and examined each chemical for its potential toxicity.

To understand how common these monomers are in the environment, researchers tested dust gathered from seven different buildings in China--a canteen, student dormitory, teaching building, hotel, personal residence, lab, and electronics repair facility. Nearly half of the 53 samples tested positive for the liquid crystal monomers.

LCD panels are almost exclusively produced in three Asian countries: China, Japan, and South Korea. It"s estimated that 198 million square metres of liquid crystal display were produced last year--enough to cover the entire Caribbean island of Aruba.

For many years, huge amounts of globally produced e-waste--including LCD displays--have been dismantled, disposed of, and introduced into the environment.

Scientists have discovered that LCD screens leak chemicals into just about every environment where they are found, according to a new study, and these particles have the potential to be toxic over time.As described in a study published last week in Proceedings of the National Academy of Sciences, researchers collected dust samples from seven buildings in China: a cafeteria, student dorm, classroom, hotel, home, lab, and an electronics repair shop. Nearly half of the 53 samples tested positive for liquid crystal particles—which are supposed to stay sealed in the screen after manufacturing—even in places where there were no LCD devices at the time of collection.AdvertisementThe international research team analyzed 362 chemicals used in LCD screens and found that nearly 100 have the potential to be toxic. These particles don’t break down quickly and have "high mobility" in the environment. When inhaled or ingested, according to the study, these particles can build up in the body over time with toxic effects, potentially causing digestive problems and other health issues.“These chemicals are semi-liquid and can get into the environment at any time during manufacturing and recycling, and they are vaporized during burning,” said University of Saskatchewan environmental toxicologist and lead author John Giesy in a press release. “Now we also know that these chemicals are being released by products just by using them.”According to the study, these chemicals are "simply filled" into the space between polarizers (light filters) during manufacturing and are not chemically bonded to any base material. This means that "they can be released during production; through wastewater; or during active use, disposal, or recycling."To be clear, the researchers didn"t observe any adverse health effects from the accumulation of liquid crystals in the human body; they only found that these crystals do in fact leak from devices, and that they have the potential to be toxic.

She is one of scores of young workers in the city of Suzhou who were poisoned by the chemical n-hexane, which they say was used to clean Apple components including iPhone touch screens.

The chemical"s potential risks are well-known in industry, as are safe exposure limits. But the Wintek manager who decided to switch from alcohol to n-hexane for cleaning – apparently because it dried more quickly – did not assess the dangers. It was used without proper ventilation.

Asked if they knew what products they were working on, three of the affected Wintek employees said team leaders told them they were working for Apple. They instantly recognised pictures of an iPhone and said they were cleaning touch screens, adding that items for other brands were not affected because Apple had isolated its production line. A lawyer acting for 44 of the poisoning victims also said several had named Apple.

Bai Bing said she and her colleagues were cleaning components including Apple logos – the kind that appear at the bottom of desktop screens – when she fell ill.

Remember when your LCD or OLED display had that brand-new, fresh-out-of-the-box shine, feel and look? You are in the right place if your display is now due for deep cleaning.

Although distilled water is recommended for wiping the display glass, you can use a cleanser developed explicitly for cleaning displays. However, do not spray it directly onto the display. Spray a tiny amount of the cleaner onto a microfiber cloth first to avoid getting any cleaning solution inside the display.Never spray any liquids directly onto the display.A spray is too hard to control and confine. The fluids can seep into the other display layers or surrounding components and cause irreversible liquid damage.

Only use a microfiber cloth and don"t use chemicals to clean a resistive touchscreen.Disconnect the display from the power supply and remove any screen protectors or liners.

Cleaning soldering residue on LCD with Isopropyl alcohol and a Q-Tip.Cleaning residue around soldering elements is not necessary if Newhaven Display performed the soldering.

Cleaning your electronic display is a simple task. However, it is essential to consider these steps to handle and clean it properly. You should now have a better understanding of what cleaning products are safe to use, how to clean the display screen glass, how to clean touchscreens and how to clean soldering residue.

Important technical improvements of LCD, such as LED backlighting and wide viewing Angle, are directly related to LCD. And account for an LCD display 80% of the cost of the LCD panel, enough to show that the LCD panel is the core part of the entire display, the quality of the LCD panel, can be said to directly determine the quality of an LCD display.

The production of civil LCD displays is just an assembly process. The LCD panel, the main control circuit, shell, and other parts of the main assembly, basically will not have too complex technical problems.

Does this mean that LCDS are low-tech products? In fact, it is not. The production and manufacturing process of the LCD panels is very complicated, requiring at least 300 process processes. The whole process needs to be carried out in a dust-free environment and with precise technology.

The general structure of the LCD panel is not very complex, now the structure of the LCD panel is divided into two parts: the LCD panel and the backlight system.

Due to the LCD does not shine, so you need to use another light source to illuminate, the function of the backlight system is to this, but currently used CCFL lamp or LED backlight, don’t have the characteristics of the surface light source, so you need to guide plate, spreadsheet components, such as linear or point sources of light evenly across the surface, in order to make the entire LCD panel on the differences of luminous intensity is the same, but it is very difficult, to achieve the ideal state can be to try to reduce brightness non-uniformity, the backlight system has a lot to the test of design and workmanship.

In addition, there is a driving IC and printed circuit board beside the LCD panel, which is mainly used to control the rotation of LCD molecules in the LCD panel and the transmission of display signals. The LCD plate is thin and translucent without electricity. It is roughly shaped like a sandwich, with an LCD sandwiched between a layer of TFT glass and a layer of colored filters.

LCD with light refraction properties of solid crystals, with fluid flow characteristics at the same time, under the drive of the electrode, can be arranged in a way that, in accordance with the master want to control the strength of the light through, and then on the color filter, through the red, green, blue three colors of each pixel toning, eventually get the full-screen image.

According to the functional division, the LCD panel can be divided into the LCD panel and the backlight system. However, to produce an LCD panel, it needs to go through three complicated processes, namely, the manufacturing process of the front segment Array,the manufacturing process of the middle segment Cell, and the assembly of the rear segment module. Today we will be here, for you in detail to introduce the production of the LCD panel manufacturing process.

The manufacturing process of the LCD panel Array is mainly composed of four parts: film, yellow light, etch and peel film. If we just look at it in this way, many netizens do not understand the specific meaning of these four steps and why they do so.

First of all, the motion and arrangement of LCD molecules need electrons to drive them. Therefore, on the TFT glass, the carrier of LCD, there must be conductive parts to control the motion of LCD. In this case, we use ITO (Indium Tin Oxide) to do this.ITO is transparent and also acts as a thin-film conductive crystal so that it doesn’t block the backlight.

The different arrangement of LCD molecules and the rapid motion change can ensure that each pixel displays the corresponding color accurately and the image changes accurately and quickly, which requires the precision of LCD molecule control.ITO film needs special treatment, just like printing the circuit on the PCB board, drawing the conductive circuit on the whole LCD board.

This completes the previous Array process. It is not difficult to see from the whole process that ITO film is deposited, photoresist coated, exposed, developed, and etched on TFT glass, and finally, ITO electrode pattern designed in the early stage is formed on TFT glass to control the movement of LCD molecules on the glass. The general steps of the whole production process are not complicated, but the technical details and precautions are very complicated, so we will not introduce them here. Interested friends can consult relevant materials by themselves.

The glass that the LCD board uses makes a craft also very exquisite. (The manufacturing process flow of the LCD display screen)At present, the world’s largest LCD panel glass, mainly by the United States Corning, Japan Asahi glass manufacturers, located in the upstream of the production of LCD panel, these manufacturers have mastered the glass production technology patents. A few months ago, the earthquake caused a corning glass furnace shutdown incident, which has caused a certain impact on the LCD panel industry, you can see its position in the industry.

As mentioned earlier, the LCD panel is structured like a sandwich, with an LCD sandwiched between the lower TFT glass and the upper color filter. The terminal Cell process in LCD panel manufacturing involves the TFT glass being glued to the top and bottom of a colored filter, but this is not a simple bonding process that requires a lot of technical detail.

As you can see from the figure above, the glass is divided into 6 pieces of the same size. In other words, the LCD made from this glass is finally cut into 6 pieces, and the size of each piece is the final size. When the glass is cast, the specifications and sizes of each glass have been designed in advance.

Directional friction:Flannelette material is used to rub the surface of the layer in a specific direction so that the LCD molecules can be arranged along the friction direction of the aligned layer in the future to ensure the consistency of the arrangement of LCD molecules. After the alignment friction, there will be some contaminants such as flannelette thread, which need to be washed away through a special cleaning process.

After the TFT glass substrate is cleaned, a sealant coating is applied to allow the TFT glass substrate to be bonded to the color filter and to prevent LCD outflow.

Finally, the conductive adhesive is applied to the frame in the bonding direction of the glass of the color filter to ensure that external electrons can flow into the LCD layer. Then, according to the bonding mark on the TFT glass substrate and the color filter, two pieces of glass are bonded together, and the bonding material is solidified at high temperatures to make the upper and lower glasses fit statically.

Color filters are very important components of LCD panels. Manufacturers of color filters, like glass substrate manufacturers, are upstream of LCD panel manufacturers. Their oversupply or undersupply can directly affect the production schedule of LCD panels and indirectly affect the end market.

As can be seen from the above figure, each LCD panel is left with two edges after cutting. What is it used for? You can find the answer in the later module process

Finally, a polarizer is placed on both sides of each LCD substrate, with the horizontal polarizer facing outwards and the vertical polarizer facing inwards.

When making LCD panel, must up and down each use one, and presents the alternating direction, when has the electric field and does not have the electric field, causes the light to produce the phase difference and to present the light and dark state, uses in the display subtitle or the pattern.

The rear Module manufacturing process is mainly the integration of the drive IC pressing of the LCD substrate and the printed circuit board. This part can transmit the display signal received from the main control circuit to the drive IC to drive the LCD molecules to rotate and display the image. In addition, the backlight part will be integrated with the LCD substrate at this stage, and the complete LCD panel is completed.

Firstly, the heteroconductive adhesive is pressed on the two edges, which allows external electrons to enter the LCD substrate layer and acts as a bridge for electronic transmission

Next is the drive IC press. The main function of the drive IC is to output the required voltage to each pixel and control the degree of torsion of the LCD molecules. The drive IC is divided into two types. The source drive IC located in the X-axis is responsible for the input of data. It is characterized by high frequency and has an image function. The gate drive IC located in the Y-axis is responsible for the degree and speed of torsion of LCD molecules, which directly affects the response time of the LCD display. However, there are already many LCD panels that only have driving IC in the X-axis direction, perhaps because the Y-axis drive IC function has been integrated and simplified.

The press of the flexible circuit board can transmit data signals and act as the bridge between the external printed circuit and LCD. It can be bent and thus becomes a flexible or flexible circuit board

The manufacturing process of the LCD substrate still has a lot of details and matters needing attention, for example, rinse with clean, dry, dry, dry, ultrasonic cleaning, exposure, development and so on and so on, all have very strict technical details and requirements, so as to produce qualified eyes panel, interested friends can consult relevant technical information by a search engine.

LCD (LC) is a kind of LCD, which has the properties of light transmission and refraction of solid Crystal, as well as the flow property of Liquid. It is because of this property that it will be applied to the display field.

However, LCD does not emit light autonomously, so the display equipment using LCD as the display medium needs to be equipped with another backlight system.

First, a backplate is needed as the carrier of the light source. The common light source for LCD display equipment is CCFL cold cathode backlight, but it has started to switch to an LED backlight, but either one needs a backplate as the carrier.

CCFL backlight has been with LCD for a long time. Compared with LED backlight, CCFL backlight has many defects. However, it has gradually evolved to save 50% of the lamp and enhance the transmittance of the LCD panel, so as to achieve the purpose of energy-saving.

With the rapid development of LED in the field of lighting, the cost has been greatly reduced.LCD panels have also started to use LED as the backlight on a large scale. Currently, in order to control costs, an LED backlight is placed on the side rather than on the backplate, which can reduce the number of LED grains.

On the transparent diffuser plate, point-like printing can block part of the light. The LED backlight on the side drives the light from the side of the diffuser plate, and the light reflects and refracts back and forth in the diffuser plate, distributing the light evenly to the whole surface. Point-like printing blocks part of the light, screening the light evenly like a sieve.

At the top of the diffusion plate, there will be 3~4 diffuser pieces, constantly uniform light to the whole surface, improve the uniformity of light, which is directly related to the LCD panel display effect. Professional LCD in order to better control the brightness uniformity of the screen, panel procurement, the later backlight control circuit, will make great efforts to ensure the quality of the panel.

Since the LCD substrate and the backlight system are not fixed by bonding, a metal or rubber frame is needed to be added to the outer layer to fix the LCD substrate and the backlight system.

After the period of the Module, the process is completed in LCM (LCDModule) factory, the core of this part of the basic does not involve the use of LCD manufacturing technology, mainly is some assembly work, so some machine panel factories such as chi mei, Korea department such as Samsung panel factory, all set with LCM factories in mainland China, Duan Mo group after the LCD panel assembly, so that we can convenient mainland area each big monitor procurement contract with LCD TV manufacturers, can reduce the human in the whole manufacturing and transportation costs.

However, neither Taiwan nor Korea has any intention to set up factories in mainland China for the LCD panel front and middle manufacturing process involving core technologies. Therefore, there is still a long way to go for China to have its own LCD panel industry.

The way you clean your computer screen largely depends on what it"s made of - you have to be more careful with LED/LCD screens than glass-coated ones.

We"ve all had that moment - you"re sitting at your desk on a normal workday, then the sun starts shining directly on your screen, and you realize you don"t know when you last cleaned it. In fact, it may have been so long that you"ve forgotten how you"re supposed to clean it.

If this sounds like you, don"t feel too bad - most experts recommend that you should only clean your computer screen every three to six months. So if you"ve waited half a year since the last time you cleaned, it makes sense that you might not remember all the do"s and don"ts of the process.

Here"s a helpful guide to help you remember exactly how to clean your specific computer screen, whether it"s a Mac or PC, including which products you should and shouldn"t use for your specific type of display.

Glass-coated screens: The screens you find on most Mac computers are glass-coated. Displays like this are a little less delicate than LED or LCD screens.

LED/LCD screens: These screens are mostly found on Windows computers. Unlike glass-coated screens, they"re made up of tiny liquid crystals and can be very easily damaged if you"re not careful. Most touchscreens and matte displays are LED/LCD.

You may want to look on your manufacturer"s website and check what kinds of solutions are safe for the screen type you have - factors like whether your screen is matte or a touchscreen may affect this.

If you have a glass-coated screen on your computer, you have a few more options as to what cleaners you can use, but you should still be careful. You can use one of the solutions listed above, but you can also use:

Turn off your computer before cleaning - this is just safe practice where any amount of liquid is involved, but more specifically, any static on the screen could create a shock and damage the internal components.

Use filtered or distilled water if you need to use it, especially in areas with hard water - minerals like calcium and magnesium in the water you use could also damage your screen.

Wipe in tight, Z-shaped motions, or directly up and down or side to side. Wiping in circles can create uneven pressure and ultimately lead to screen damage. It"s also more likely to create streaking.

Use any fabric that feels rough to the touch - even a fabric as soft as a cotton shirt has snags and uneven parts that can damage a computer screen. Microfiber cloths are ideal because the fibers are so tiny that they can cover every inch of the screen with even pressure at the same time, eliminating any opportunity for scratches.

Spray any cleaning solution directly onto the screen. To avoid any risk of damage from excess moisture, spray the solution directly onto the microfiber cloth instead.

Apply pressure when you clean the screen. This will likely damage the internal components of the screen and could leave scratches or spots of discoloration or dead pixels that won"t go away.

Even if you"re working on a particularly stubborn spot, don"t scrub - rather, leave the damp cloth sitting on the screen for several minutes, then try to gently wipe it away again.

Once you"ve turned off your computer and dusted off the screen, mist a dust-free side of your microfiber cloth with a cleaning solution that is safe for the type of screen you have.

Wipe the screen in a consistent, non-circular motion without applying too much pressure. Make sure no moisture accumulates, especially at the corners - if it does, use a dry corner of microfiber cloth to gently wipe it away.

Modern projectors are one of the best tools that any conference room can have. They also make for great additions to any living room or classroom looking to increase screen size. They are an affordable way to project images into large surfaces while still maintaining a clear, smooth, and sharp image. LCD screens have become an integral part of most projector’s optical assembly units since the 90s. In this article, we will show you how to properly clean and maintain the screen of an LCD projector.

LCD’s or Liquid Crystal Displays are the most common type of screen found on most electronic products. They are relatively affordable and very versatile, you can easily find LCD screens that are as small as a watch, or as big as a wall-mounted television set. They are used mostly in computer monitors, television displays, projectors, mobile phones, calculators, and even in military aircraft displays.

The screen works using the inherent properties of liquid crystals. The liquid crystals are usually held between two sets of transparent electrodes. When an electrical charge is passed between the electrodes, the molecules of the crystals can be manipulated predictably to form different images. Most LCD screens have internal control mechanisms that transform the signals coming from any given device into precise electrical inputs, these allow the screen to render any image we want.

If your screen gets dirty or damaged there is no need to panic. There are several solutions to keep an LCD screen well maintained and working properly. Let’s explore some of the main reasons the LCD projector screens get dirty or damaged.

There are multiple ways by which the LCD screen in your can stop functioning properly or decrease its picture quality. Maybe you can see a fractal of psychedelic colors when you project your image, or there is a visible line blocking the image that can’t be removed by simple cleaning. Let’s look at some of the most common reasons.

Depending on the issue you are having, it is important to understand the best ways to approach the handling of an LCD projector screen. On most projectors, the LCD screen is located within the optical unit of the device. One of the most common issues is dirt and stains stuck to the outer layer of the glass. This is by far the easiest problem to fix because there is no need to disassemble the projector to access its components. On our example project, we can see that there are stains and some dirt accumulating on the screen.

The black dots tell us there is some dirt stuck to the screen. The shadowy smear is probably a stain. For this simple cleaning job, it is important to know the best tools you’ll need to proceed.

One of the biggest mistakes people make when attempting to clean an LCD projector screen is rubbing their fingers on the screen to try and eliminate the issue, but this may cause further problems as hands tend to leave smears and stains on screens. If enough pressure is added you can actually damage the screen. To remove all the dust, dirt, and stains from the outer layer of the screen you will need:

These are common household items that you might already have in your possession! A lint-free cloth is very important because if the surface of the cloth isn’t smooth, you can easily scratch the screen.

Now comes the fun part! Clean the screen. Make sure you don’t apply too much pressure. Begin the cleaning using circular motions and remember to be gentle. The goal is to soak up the dirt or dust with a wet cloth. Most dust will get absorbed by the cloth and the dirt will loosen up. Any stain or smear should come right off when the alcohol is applied, this happens because pure alcohol is one of the best chemical solvents around. Once you have cleaned the screen, try passing a dry portion of the cloth to soak up all the remaining solution.

Now that you have cleaned the screen, you’re all set! Go ahead and test the projector and look out for any visual cues that might indicate that your cleaning wasn’t thorough enough.

Make sure you repeat this process as many times as possible till you see thing goes right. We recommend you keep the proper maintenance of your screen every time you use it. This is to allow the screen to remain as shiny and clear as possible. The more work you put into maintaining the LCD screen clean, the better the results will be. Save yourself the headache of seeing unwanted spots when you need to use the projector, and try to maintain it clean.

If you are careful and follow proper maintenance procedures, you should be able to enjoy a clear and smooth viewing experience every time. However, sometimes some spots become difficult to remove, or they just don’t remove at all. Some of the most common persistent issues you might encounter may not be because of dust, dirt, or stain accumulation. They might persist because there is probably some deeper damage that isn’t fixed superficially.

If you think the problem lies inside the projector’s optical unit, you can always disassemble the projector to see what is going on. We recommend you have your user manual with you in order to check what projector model you own. Do some internet research to check what type of LCD screen your projector houses, and if it can be replaced. The most common problem is the dust has entered through the cooling fan accumulating near the optical unit. To fix this you’ll need:

Remember that before accessing any components the projector has to be off and unplugged, this is extremely important so do not skip this. Simply remove the projector cover and try to see if any dust or dirt has accumulated. You can then proceed to clean it off using a small vacuum cleaner or some strong puffs of compressed air. Be sure to not allow any moisture o touch the components.

An often-overlooked reason why a projector might continue to stay dirty is the condition of your room. If the room where your projector is located tends to be filled with dust, we recommend you cover your projector with a cloth or a cover. Some projectors come with protective covers for this reason, so if you find out the conditions of your room are not ideal, maybe investing in some protection is a good option.

You can absolutely change the LCD screen of a projector. You can do this in a few simple steps. We recommend you contact the manufacturer to see how they can help you. Changing components inside a projector is a daunting task for most people, so you can save yourself the hassle by emailing or calling the manufacturer. If you want to do it yourself you can:

We hope you have learned a bit more about how projector LCD screens work. We also showed you some of the most common issues people run into with their projector LCD screens. How to keep the screen of your LCD projector clean is an easy task if you make sure you treat your unit with care and follow some simple instructions. Remember that most of the tools we used (e.g. water, lint-free cloth, isopropyl alcohol) are very common household items. So give it a go and enjoy your ‘newly-bought’ projector!

Responsible for performing installations and repairs (motors, starters, fuses, electrical power to machine etc.) for industrial equipment and machines in order to support the achievement of Nelson-Miller’s business goals and objectives:

• Perform highly diversified duties to install and maintain electrical apparatus on production machines and any other facility equipment (Screen Print, Punch Press, Steel Rule Die, Automated Machines, Turret, Laser Cutting Machines, etc.).

HONG KONG, Aug 4 (Reuters) - Chinese officials have blamed the chairman of a car parts factory in eastern China and local regulators for safety breaches that led to the most deadly industrial accident in a year, the official Xinhua news agency reported on Monday.

A preliminary investigation suggested the blast was triggered by a flame lit in a dust-filled room, local government officials said. Dust can be highly explosive when it is suspended in air in the right concentrations, and is true even of materials such as aluminium and iron that don’t typically burn.

Kunshan Zhongrong, which polishes aluminium wheels for automakers including General Motors Co

The factory also ignored prior warnings about dust, did not have appropriate fire safety equipment and did not provide safety training for workers, according to the report.

It said on Monday that the State Council has approved a special task force to investigate the accident and will soon carry out nation-wide inspections on plants and their dust control measures. It also said that authorities will draw up comprehensive regulations and standards on dust control at factories. (Additional reporting by Fiona Li in BEIJING, Fayen Wong in SHANGHAI and the Shanghai Newsroom.; Editing by Raju Gopalakrishnan)

The iPhone 11 display has rounded corners that follow a beautiful curved design, and these corners are within a standard rectangle. When measured as a standard rectangular shape, the screen is 6.06 inches diagonally (actual viewable area is less).

iPhone 11 is splash, water, and dust resistant and was tested under controlled laboratory conditions with a rating of IP68 under IEC standard 60529 (maximum depth of 2 meters up to 30 minutes). Splash, water, and dust resistance are not permanent conditions. Resistance might decrease as a result of normal wear. Do not attempt to charge a wet iPhone; refer to the user guide for cleaning and drying instructions. Liquid damage not covered under warranty.

The LED display needs to be cleaned before and after installation, which is a very important link to prevent the LED display from being unclear during operation. In the case of mosaic and black screens, there will be dust and other debris affecting the display after operation for a period of time. Regular cleaning and maintenance of LED displays can prolong the service life of LED displays and improve the service quality of LED displays. Now we will introduce it to you：

When the LED module is only a semi-finished product without a kit, it needs to be cleaned with special plate washing water. After the LED module is dyed with some plate washing water, it is brushed with a brush to accelerate the dissolution of rosin and the falling off of flux, and remove dust and impurities.

After the LED electronic display screen is installed and displayed for a period of time, dust and impurities will accumulate. In order not to affect the display effect of the display screen, it is necessary to add clean water or water to clean the surface of the LED display screen to remove different types of dirt. Be very careful when cleaning, and do not bring the cleaned water to the back of the LED module.

LED display cleaning fluid: it has the advantages of environmental protection, dust removal and no damage to the screen. It is the choice to replace chemical cleaners.

LED display repair agent: This product has multiple functions. In other words, the dual functions of glazing and repair make the LED display as bright as new. At the same time, it has anti-static, dust-proof and anti-corrosion functions.

Dust removal: that is, blow dust in the same direction, from left to right or from right to left. Use a professional brush to clean the dust or dirt on the surface of the display module. When cleaning, clean the pneumatic brush evenly according to the pollution degree, service life, or aging of the display screen;

Secondary dust removal: use a professional brush to clean the dust off the LED display module again. Note: this cleaning requires replacing the brush. The brush can be reused, but it needs to be cleaned to avoid re-contamination;

Secondary cleaning: spray the special cleaning solution on the surface of the module for secondary cleaning to remove the dust left by the secondary dust removal. The ratio of cleaning fluid to water is determined by the residual dirt on the surface of the display screen. If there is not much dirt, you can spray it with clean water. Keep the spraying direction consistent from top to bottom or from top to left;

Television screens are supposed to be clean and free of dirt, dust, or any debris that may blur vision. This is why this component is one of the most vital parts of a Television. Nothing can be worse than straining your eyes to make sense of the pictures your set is projecting. If you do not clean your TV regularly, fingerprint smudges and dust will build up.

Cleaning your LED TV or any type of television for that matter is something you should do at least once every 2 or 3 weeks. In fact, I will suggest that you do it as often as you watch it any paying more attention to the screen when you do so. If you clean your TV set regularly, it will always look brand new, and you will enjoy bright and colorful pictures without said. Bearing that in mind, there are ways to go about a cleaning endeavor. Unfortunately, not everyone knows how to clean a set effectively. Many think that a piece of towel soaked in water will do. How wrong they are. Television screens are very sensitive, so a great deal of care is required to do the job effectively. In addition to that, being careful also protects the screen for damage. Secondly, you need to understand that TV sets are different. Although they all project sounds and images, they are built differently. So, therefore, the approach to cleaning should also be different as well.

The approach to cleaning an LED TV screen, for instance, requires extra care compared to the cleaning of a Tube TV. They both have screens, but the former is more sensitive than the latter due to the sensitivity of LED screens build material. Bearing all this in mind, how do you safely clean an LED TV screen without damaging it in the process. In this article, we will show you safe and intelligent ways to go about it using available and affordable materials. You will also learn a few tips about how to do it safely too.

Before you proceed, you need to bear two things in mind when cleaning LED TV screens. Firstly, you want to do it in such a way and with the right materials that ensure the screen is clean and devoid of dust or stains of any kind. You want your screen to be as bright and clear as possible. Secondly, you want to avoid damaging the screen or reducing its projection quality. This is why it is necessary to use only the right cleaning materials and approach at all times. Now, here are some helpful tips for adopting when cleaning an LED television screen. [/fusion_text]

Reading manuals is important because different television manufacturers provide different approaches to cleaning their sets. What works for an LG LED TV may not work for a Samsung set. That is why it is so important to only follow the recommendation of a one cap fits all approach to cleaning your TV screen. If you read the manual when you bought it, but you have forgotten the cleaning details, consult it once again to refresh your memory.

Before you start the cleaning properly, turn off the television set. Do not stop at that. You also need to unplug it from the power source. Once you have done that, do not start cleaning the screen immediately. Give it time to cool down. The cleaning process may take between 2-5 minutes or even more depend on your LED TV model or how long it was on.

Turning the TV off will cut off power leading to the cooling down of the screen. You don’t want to be cleaning a hot or warm screen, do you? You want to make sure that the screen is as cool as possible and non-reactive to whichever cleaning agent you use.

Another advice to take in that is so important is that you should never use paper towels to clean the screen. There are reasons to avoid paper towels. Paper towels, especially when soaked in water, leave smudges and stains on the screen. No matter how long or how hard you try to wipe the marks off, they yet remain. Paper towels are bad for your TV screen. It’s as simple as that.

To enjoy an ultimate cleaning experience, you should consider using microfiber cleaning pieces. Some people recommend cotton whole because they are more breathable. However, microfiber cloths are more durable. In addition, they do not stick to your screen. Older LED, or LCD screens can’t handle traditional cleaning methods or materials. With microfiber, you can eliminate stains, remove smudges, and fingerprints with ease.

To use microfiber, simply wipe the surface of the screen in a circular motion. Cover as much part of the screen as you possibly can. Work your way around the edges as well. More importantly, when cleaning, avoid touching the screen with your bare hands as doing so will leave fingerprint marks on it.

The use of chemicals should be avoided at all costs. Chemicals damage screens more than you know. That a chemical agent worked on a particular surface is not an indication that it will work well for your TV screen. LED screens are very sensitive and fragile, so you ought to make sure that you keep chemicals as far away as possible. Another material you should never use is a detergent solution (water and detergent).

Soap, scouring powder, was window cleaners, and any other general industrial cleaner should be avoided. Abrasive pads and towels made from paper should not be used either. Using any of these materials will lead to screen scratches, anti-glare coating damage, or permanent screen damage. The sad part is that the damage may not be noticeable at first, but over time, the same will become permanent.

If you must wet your cleaning material with water, do so in little splashes. Avoid spraying the screen directly with water. When wiping the screen, do so gently because it can break if pressed too hard as screens are very fragile.

You will notice that your microfiber cloth cannot reach the edges of the screen like the other areas. If you don’t clean the edges too, dust and first will accumulate in those parts, and after a time removing the stains will love difficult. Furthermore, failure to clean screen edges will lead to an uneven appearance, with poor picture quality being the end result. To clean edges and corners effectively, use cotton swabs to greater effect. For better results, dab the cotton swabs in water. Pick off the dirt carefully by dragging them out using the swabs. Do this for the four corners of the screen.

Unlike an LED TV screen, cleaning a Tube TV is much easier. Tube TV screens are more rugged and can withstand pressure, but doing so carefully is also important. You can use a microfiber cleaning cloth doused in a little water. Never spray the screen directly as this may damage it. Rather, work your way with the microfiber cloth. Apply the same circular cleaning motion like you would do an LED TV screen. Cotton swabs will also come in handy to pick off the dirt from the screen corners.

Dish soap can also be used on LED and LCD screens, albeit with care. Before you use a dish soap solution, first wipe the screen with a dry cloth to remove dust. Now, dip your cleaning cloth in the dish soap solution. Squeeze off the liquid then gently wipe the screen. Make sure you cover every surface area. Once you are done, don’t waste time to clean; otherwise, the solution will dry up on the screen leading to a blurry vision. Rinse the cloth with water to remove soapy residue then take the dry cloth you used to wipe off the dust once again to dry the screen.

Yes, they do. There are actually cleaners specially made for cleaning tv screens. Screen cleaners contain distilled water, isopropyl, and alcohol solutions. If you must use an electronic screen cleaner, make sure you shake to content before use. Also, apply on a limited portion of your cleaning cloth.

Tap the remote lightly on a hard surface:Remote controls gather a lot of dust and debris along the way. To remove them, tap the remote control on a hard surface like a table. Do this gently and several times to dislodge debris stuck in crevices.

Maintain a weekly timetable:To ensure that your TV set is always clean, make sure you clean it weekly. Add it as part of your to-do list when cleaning your home. If your furniture deserves regular cleaning, so does your television set. Doing regular cleaning will atop dust, debris and fingerprints from smearing the screen. It is also much easier to clean when there is little dust on the surface. Keeping a microfiber cloth close by is also advised so that you can quickly wipe off dust when necessary.

Never spray your LED TVset directly with any substance:Avoid spraying your screen directly with any substance even if it is an electronic cleaning gel. Excessive spraying can damage the cabinet and the structural make-up of the screen. If you must use any cleaning solution, apply it on the napkin or microfiber cloth you are using and gently wipe the screen with it.

Use a Vacuum:To draw out dust and debris hidden in the crevices of the set, use a low suction vacuum. You may also use the vacuum cleaner’s soft brush to remove dust from the cable, vents, and ports of the TV

Avoid strong cleaning agents:Just like we pointed out in the article, avoid strong cleaning agent as not all of them are good for your television’s screen. The screen is very sensitive, so bear this in mind. Some examples of cleaning agents to avoid include unmixed alcohol, ammonia, acetone, and Wax.

Maintaining your LED TV set requires a lot of patience and attention to detail. If you want the screen to remain in good shape, you need to clean it regularly and with proper cleaning materials. If you follow the tips in this article, your screen will remain bright and sharp for as long as you use the set.