clean lcd panel epson projector free sample

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:

Prepare the Lint-free cloth by moisturizing it with the isopropyl alcohol or water. Feel free to use the alcohol-water blend if you want the alcohol to last longer. Make sure the cloth is not soaking wet or too dry. Once you have your cleaning materials ready proceed to the next step.

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.

Most of these issues will require a bit more tech-savviness in order to be fixed. Remember that if you are to disassemble the projector you might lose any warranty. So be sure to handle all the components with care.

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!

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The EMP-6100 dust-proof projector was designed to be installed in harsh environments that would cause normal projectors to suffer frequent breakdowns. This includes places where people are constantly coming and going, where doors and windows are frequently opened and closed, and regions with a lot of dust, sand, and smoke.

Projectors that use a lamp to project an image have a cooling fan that constantly draws in cool air and then expels warm air to counteract the increase in internal temperature caused by the lamp. Epson attached a large electrostatic filter capable of absorbing fine particles, similar to the kind used in the engine room of automobiles, to the air inlet of the EMP-6100. This filter, along with a completely air-tight structure except for the air inlet and exhaust, keeps the inside of the projector clean by preventing dust and tobacco smoke (tar) from getting inside the projector and then reducing the brightness of the lamp and harming the performance of the LCD panels.

When the filter absorbs so much dust that it becomes clogged, an internal air flow sensor detects the reduced flow and uses an LED indicator or an on-screen notice to inform the user that the filter needs to be replaced or cleaned. Ease of maintenance was also a consideration when designing the filter, which can be replaced single-handedly while the projector is mounted on the ceiling.

Two years before commercialization of the EMP-6100, Epson began noticing that a significant number of projectors in Chinese elementary and middle schools were breaking down. China had been using projectors in its school classrooms for several years, but large amounts of dust and sand were causing the projectors to break down in just a few years. In addition to the yellow sand that blows across China all year long, building and house construction sites kick up a lot of dust that then gets inside projectors, where it accumulates and causes problems. As a pioneer of the projector business, Epson quickly decided to address the issues facing its customers by rapidly designing a durable product that could resist sand and dust, and thereby increase the presence of its projectors in the promising Chinese market

The development of a dust-proof projector was further driven by the increasing use of projectors for various purposes in many other countries and regions, as well. Even in developed economies such as the U.S. and Europe, dust-proof projectors were needed in high-use environments, for example ceiling-mounted projectors at universities and restaurants and amusement facilities with high concentrations of tobacco smoke.

After the launch of the EMP-6100, more and more users began to recognize the need for sufficient dust protection when installing a projector outdoors or in a dusty room. This, in turn, made dust resistance a new selling point for projectors and drove other companies to also launch products with anti-dust features.

Epson"s lineup of dust-proof projectors, which was launched with just two models, is now being expanded to meet specific customer needs based on the size and brightness of the places in which the projectors will be used. Now, anti-dust features come standard on most of Epson"s major products sold in China and are a driving force in the growth in sales of Epson projectors.

This combination of Epson projector and Elite screen represents a great value for those seeking a daylight-friendly, ultra-large-screen viewing option.

Ultra-short-throw (UST) projectors are becoming an increasingly popular alternative to regular front-projection systems. The reason is that, unlike regular projectors, which require careful lighting control to perform their best, UST models can operate in well-lit environments. They beam light upwards and are designed to be mounted only a few inches away from the screen, an arrangement permitting clean installations that not only are free of ceiling mounts or long wiring runs but also avoid the problem of onscreen shadows when someone traverses a projector’s beam.

Another display category that UST projectors are taking a bite out of is ultra-large flat-screen TVs. One example is Sony’s VPL-VZ1000ES projector, a $25,000, 4K-resolution, ultrashort-throw model I recently reviewed in these pages (October 2017; also available at soundandvision.com). Even at that price, the Sony, which is capable of beaming images as large as 120 inches, comes off as a bargain per-inch compared with TVs like Samsung’s twenty-grand 88-inch QN-88Q9F. Epson’s new entry on the UST scene is the LS100, a 1080presolution, three-chip LCD projector that, similar to the Sony, uses a laser light engine. The LS100 costs $3,000 and can beam images up to 130 inches. Does it represent the same bargain as the Sony? Let’s look.

One benefit to a laser light engine is rapid startup: After hitting the projector’s power-on button, it takes only about 5 seconds for a picture to pop up onscreen. Another benefit is longevity. While most projectors require a lamp replacement after a few thousand hours, Epson claims up to 20,000 hours as the lifespan for the LS100’s light engine. The company’s specs cite brightness for both the white and color components of projected images at 4,000 lumens. They put the contrast ratio at 2,500,000:1, which may well be the highest contrast ratio claim I’ve seen, short of infinite. Unlike many other current 1080p-res projectors, including other models from Epson, the LS100 doesn’t do 3D.

It may not have the same elegant design as Sony’s UST projector, but the Epson’s relatively compact black case (measuring roughly 19 x 7 x 17 inches, WxHxD) has an understated look that should let it blend in with most environments. Fan noise when the projector’s Quiet Light Source mode is selected is very low—another factor that will help it blend in with a living room space. (Fan noise in the Normal Light Source mode, which runs laser brightness at full power, is notably louder.)

A full set of control buttons is provided on the projector’s right side as you face it. Input connections are located on an inset section on the back left of the projector—the side that actually faces the screen, and they include a trio of HDMI inputs (one with MHL support for connecting a compatible smartphone or tablet), two USB type-A inputs, and one USB type-B input. There’s also a LAN port for linking to a home control system. An additional set of connections is hidden under a nearby panel and includes composite video and VGA inputs, along with an RS-232C control port.

Epson’s compact remote is packed with small buttons, many of which are used to control features meant for classroom instruction, such as picture split, freeze, and zoom modes. (Although it’s sold as a home entertainment projector, the LS100 clearly has a counterpart in the education market.) Also, the keypad isn’t backlit, making it difficult to find specific buttons on the crowded handset in a dim room. On the plus side, power and input selection buttons are set off in a section at the top. After using the remote for a while, I was eventually able to get a handle on things.

During my evaluation of the LS100, I used two separate ambient-light-rejecting screens designed specifically for use with ultra-short-throw projectors. The primary screen was a 90-inch-diagonal model from Elite Screens’ Aeon CLR series, which is also under formal review here. I placed the projector on a low table in my home theater, with its top front edge about 8 inches from the screen plane and 1 foot below the screen’s bottom edge. The other screen, used as a reference, was a 92-inch diagonal 5 series Zero Edge frame from Screen Innovations paired with the company’s Short Throw (ST) material.

Tweaking image geometry proved fairly easy using the projector’s built-in test patterns and adjustable feet. There are Tele and Wide zoom controls to adjust image size and position controls to adjust horizontal and vertical placement, but these are all digital controls that reduce resolution by remapping the image on the projector’s display chips. Image focus with the LS100 is a bit odd in that you have to remove the projector’s air filter cover and raise or lower a lever tucked away in that compartment. Fortunately, this is something you typically have to do only once, and the Epson’s control allowed me to achieve crisp image focus across all areas of the screen.

The LS100’s picture presets include Cinema, Bright Cinema, Dynamic, and Game modes. Making my adjustments in Cinema, I used the Customized controls in the White Balance menu to adjust its grayscale by tweaking the RGB gain and offsets. I also selected a gamma setting that gave me a balance closest to a 2.2 target, and I used the color-management controls in the RGBCMY menu to tweak color point accuracy. Controls in the Image Enhancement menu let me adjust image sharpness without adding any ringing artifacts or other noise to the picture. Last, I selected the High Speed option in the Dynamic Contrast menu—a setting that delivered the best overall contrast ratio when used in conjunction with the projector’s Quiet Light Source option.

I did plenty of casual viewing with the Epson projector and Elite screen before seriously digging in for my review. During that time, I found the picture to be satisfyingly bright, with decent contrast even during daytime viewing with room lights left on. With a maximum 70 foot-lamberts of measured light output, brightness isn’t as powerful as what you’d get with a flat-panel LCD TV—or even an OLED TV, for that matter. But it was better than what I measured with the Sony VPL-VZ1000ES, though that projector delivered a higher measured contrast ratio.

Choosing for Room Size/Viewing Distance Every projector has a throw ratio. This refers to the size of image the projector can create for a given distance. This is usually a range, thanks to the optical zoom – you can find it in the user manual or specifications page online (if it"s for a projector you plan to buy). You can calculate the projection image size by dividing the distance between wall and the projector by the throw ratio of the projector. So if your projector is placed 10 feet away from the screen and has a throw ratio of 1.8-2.22, then you can get an image size that ranges between 54 – 66 inches. Ideally, you should be sitting at a distance that is more than twice the width of the image. To make things simpler, many manufacturers offer a distance calculator on their website for various models. Here, you just input a distance or required screen size.

Tip: Some aberrations can be corrected in-projector (keystone for example) but proper placement is the most preferable. If not possible due to placement/room constraints, then you can move on to digital corrections.

Screens are the best way to get the best performance from a projector. A screen will always be smoother than a wall and it will offer higher, more even reflectance. Some screens have gain – they reflect light better, thanks to shiny particles – and this helps in brighter rooms or if your projector is old or has low brightness. Some screens have black borders that add to the perceived contrast – making the image seem better. Finally, screens are also the correct shade of white/grey, solving the problem of a colour cast that some walls may cause. Having said all this, you can use a wall too – there are obvious cost advantages. If you must use a wall, make sure it is as smooth as possible (a plaster of Paris coat helps) and painted in flat white.

There are three main technologies used for projection – DLP, LCD and LED. DLP (Digital Light Processing) uses a chip made of tiny microscopic mirrors and a spinning colour wheel to create an image. DLP projectors deliver sharp images, don"t need any filters, have a better response time as well as 3D capabilities. The effective lamp life of a DLP projector is only 2000-5000 hours and some people see colour ghosting/banding in some scenes. On the other hand, LCD projectors use liquid crystal displays, have no moving parts and thus are generally less expensive. If you are on a budget a single chip LCD projector is ideal while 3-chip LCDs offer better colour saturation, lower noise levels and work better for movies. However, LCDs require constant filter maintenance and output less contrast. The LEDs in LED projectors have a lifespan of over 20,000 hours. They deliver better colours, have lower power consumption and virtually zero maintenance costs. Also, LED projectors are smaller and generate less heat. Do keep in mind that LED projectors have limited brightness compared to LCD or DLP so they are not recommended if your room has a lot of ambient light.

Tip: Some high-end projectors come with a feature called lens-shift. This is a physical rail that adjusts the lens up/down & sideways to move the image around. Obviously, this offers a lot more flexibility with regards to projector placement.

Pico projectors use LEDs as the light source due to which they can be extremely compact in size. Pico projectors can fit in your palm or be integrated into various devices like mobile phones (Samsung Galaxy Beam), tablets (Lenovo Yoga Tab 3), computers, and even digital cameras (Nikon S1000pj). While these projectors do not offer very high resolution or brightness, they are good enough to use in a small, dark room. You can get a 60-inch screen and you can connect multiple devices like smartphones, gaming consoles and laptops. Moreover, the portable size enables manufacturers to add internal storage as well as rechargeable battery in devices that weight less than 200 grams.

Tip: It"s always better to ceiling mount a projector because there are less chances of it being moved once setup. It also places the projector a fair distance away from the viewer so that fan noise and while becomes less audible.

If the projector is not placed perpendicular to the screen, the image is not rectangular – this is a keystone error. Most projectors offer digital keystone correction in the horizontal and vertical planes.

A 3 colour LCD system uses individual LCDs for red, green and blue. The light from each LCD is combined using a prism to create a final image. It usually offers better quality than single chip LCD or DLP designs.

This happens if you"re sitting too close to a projector – fine lines will be seen between the individual pixels on the screen/wall. A screendoor effect usually doesn"t matter if you"re displaying static images (or a presentation) but it affects movies/videos.