Posts Tagged ‘Right’

Dark areas on left and right side of projection screen. Why?

by Adam Melancon

Question by BWANA: Dark areas on left and right side of projection screen. Why?
I have had a TV projection home theater system for over 15 years. A few years ago I changed the projector to a Panasonic PT-AX100U, which I love. It’s a great projector and throws a wonderful image.

I was given a given a Blu-ray Player for Christmas, and as a result, am now projecting in 16:9 as opposed to the 4:3 it has always been in the past. Whether the image is coming from the Blu-ray Player (HDMI) or my DVD Player (Component) the results are the same. The wide image on the screen NOW has a “very slight” dark band with a sharply defined edge, on the extreme right and left sides of the projected image. It’s like those sides are down in exposure just slightly. It is especially noticeable when the screen is filled with a lighter image like a sky or lots of white or other light colors.

Since I’m rather a perfectionist, it bothers me. Could it be the projector “bulb”, or what? It is NOT the screen, especially when you consider the image has ALWAYS filled the screen from right to left over the years.
I found out from Panasonic that they believe it’s the internal “panel”.
“This would refer to the LCD panel that provides the image that’s projected. The panel will age over time and eventually would need to be replaced. If the unit is used with a 4:3 image, the edges that are dark will not age at the same rate as the center. This would only be noticed when a full screen image is displayed.”
Seems like that’s the problem to me. Time will tell.
I found out from Panasonic that they believe it’s the internal “panel”.
“This would refer to the LCD panel that provides the image that’s projected. The panel will age over time and eventually would need to be replaced. If the unit is used with a 4:3 image, the edges that are dark will not age at the same rate as the center. This would only be noticed when a full screen image is displayed.”
Seems like that’s the problem to me. Time will tell.

Best answer:

Answer by Kevin L
It sounds to me like the same issue I had on my projector, although mine was a Dlp yours is i believe is a lcd. Mine was not fixable with out spending a huge amount which it was not worth doing. Now I would suggestion trying a new bulb hoping that’s the issue, but it could be whats called the ballast. This is the chamber that the light from the lamp transmits the light through and redirects the light through prisms and mirrors. The mirrors or prisms can shift or move because with amount of heat generated from the bulb can cause the glues that hold them in place.

Hopefully that’s not the issue or yours is easily replaceable and less costly.

Good luck
Kevin

What do you think? Answer below!

Tips In Choosing The Multimedia Projector That Is Right For Your Business

If you own or work for a business, chances are that you regularly hold or participate in meetings. These meetings would normally include presentations, e.g., of reports, product concepts, issues for discussion and/or decision making, and other business-related topics. These presentations are more effectively done with the help of a piece of equipment that is fast becoming a standard fixture in most businesses: the multimedia projector.

Thanks to modern technology, the multimedia projector has shrunk in size and is much lighter than it’s “ancestors”, yet is many times more powerful and feature packed. What is even better is that this superiority comes with a price tag that is a mere fraction of what the bulkier, higher maintenance and less user-friendly predecessors used to cost. With the presence of several competitors, these prices are destined to decline even more. No wonder then that even a small business can afford to have one.

What are the things you need to consider when investing on a multimedia projector? Consider the following factors:

• Size of venue – The size of the venue of your regular meetings gives you an idea of the minimum brightness (measured in ANSI Lumens. One lumen is the equivalent in brightness of one candle) that you would need for your multimedia projector. The bigger the venue, the bigger the screen size needed. The bigger the screen size, the farther away the multimedia projector needs to be located to achieve it. And the farther away the projector is the brighter it should be in order to display sharp images even during full-lit conditions. As a rule of thumb, do not consider buying a multimedia projector that delivers less than 500 ANSI lumens unless you want to be extremely selective as to where it will be used.

• Resolution Requirements – Previously, pixel resolution was a premium for an old projector, with the standard being a mere 800×600 pixels (VGA). This limited the enlargement that a projector could “throw” to the screen. Nowadays, it is not uncommon to have XGA (1024×768 pixels) resolution in a practically-priced multimedia projector. Some already have WXGA widescreen XGA which allows projection of a movie in a reasonably-sized room for private entertainment! Normally, however, XGA will do nicely for most of your requirements.

• Technology – There are currently three multimedia projector technologies currently available:

o LCD (liquid crystal display) is the established technology used by most of the leading manufacturers.

o DLP (digital light processing) is a newer technology used on some of the smallest, lightest projectors currently available. While LCD gives clearer still images, DLP provides smoother video images.

o LCOS (liquid crystal on silicon) technology uses liquid crystals on glass panels, and light passes through the LCD panels to the lens.

There are several suppliers of multimedia projectors available, both of the single and multiple brand varieties. It is advisable that you canvass for the equipment that best suits your requirements before making a final purchase decision. You will, therefore, need to know what it is that you really need before you go out start formal canvassing.

Is an LCD Television the right choice?

your biggest thing to consider when purchasing a television was the size of the television. This was usually determined by your budget and . When those needs were the project was trouble-free. Purchasing a TV in the present market is a much more complex task: there are LCDs, Plasmas, and projectors to decide from. Ahead of a purchase can be completed, to begin with you must recognize what your options are as well as how they match against each other.

LCD TVs and Plasmas operate differently to achieve the same required effect: providing a sharp, clear, highly responsive image. lcd television have crystal cells that tighten and unwind appropriately as they are sparked via an electronic signal. A intense backlight suffuses the cells and as they rotate they sort out all the colours in the spectrum except for the required one. Plasma televisions have millions of pixels that, once activated, release gases that work to produce a certain colour in the red, blue and green bands enclosed within the pixels.

Until recently Plasma screens were notably superior a variety of views. Because of the winding and unwinding activity of the cells in LCD televisions, sharp moving video, specially sports and action films, frequently show a trailing appearance as the images changed and moved. Plasma screens do not do this because every pixels is activated individually. Plasmas produce undistorted imagery at sharply-angled viewpoints, unlike LCDs, whose images can appear fairly corrupted when viewed at similar angles. Plasma screens also exposed much deeper colours than LCD televisions, with particularly deep blacks.

Enhancements and upgrades in the LCD design have allowed it to match Plasmas in zones that it had shown deficiencies. lcd television also have many obvious benefits over Plasmas. Plasma televisions may have at first been able to show off the largest screens, but they by no means have the smallest. LCD screens now have screen sizes that can virtually match the biggest plasma televisions, and they can be produced so small that they equip a lot of telephones. They’re also more portable. Plasmas are awfully heavy and normally thicker televisions, which makes it not easy to move them. They also can’t be mounted to weaker ceilings or walls due to their weight.

Plasma TVs do have disadvantages. As they contain gases, they are also affected by air pressure. As a result they don’t act as effectively at high altitudes. lcd television, though, are not affected by this. As a result, they’re used in generally all airlines and are favored in a lot of high cities. Plasma TVs what’s more experience a burn-in effect, which happens if a still image is left on the screen for a long period of time. This can come about when a movie or game is left on pause for an extended period of time, or if the panel is being used to transmit computer imagery. Subject to the extent of time the image is left on the screen, the burn-in can be serious and permanent.

LCD televisions are steadily becoming the obvious choice. The crucial issue to most customers, the cost, has smoothed out so that Plasma panels aren’t the guaranteed best-buy. The enhancements to the technology and the price have let LCD televisions to turn into the dominant format in the television market.

lcd television are improving and evolving central in every dimension – factually: they are at this moment starting to put forward 3D screens. Furthermore, they can work much longer than Plasma television screens. Even though they have a tendency to be rated for equal lifespans, the end of the Plasma television’s lifespan highlights the aspect at which it is partially as bright as it at first was, whereas the projected end of an LCD screen’s life is marked by the point when the backlight burns out. At these points a Plasma television will continue fading until the image is no longer visible, while the LCD panel’s backlight can be replaced.

And if you are not doing a Powerpoint presentation in multiple areas, projectors are no way as good as LCDs.

Pick the Right Replacement Lamp

Selecting a replacement projector lamp can be very confusing, given the amount of choice available in the market today. But a particular bare lamp can be used only with certain projectors.

For instance, there is a huge difference between the P-VIP 180/230W 1.0 E17.5 E & U bare lamps. The Osram P-VIP 180/230W 1.0 E17.5 E replacement lamp can be used with Acer PD125 Projectors with lamp code L1720A and alternate lamp code EC.J1601.001. You can also mount this replacement projector lamp on HP’s mp3220, mp3222, mp3320, and mp3322 DLP Projectors with lamp codes L1720A, L1720A, L2152A, and L2152A respectively.

The Osram P-VIP 180/230W 1.0 E17.5 E replacement projector lamp also goes with Toshiba TDP-T80, TDP-T90, TDP-T91, TDP-T98, and TDP-TW90 projectors with the lamp code TDPLW3. You can also use this as a replacement lamp on Luxeon D-418V, D-625MX, and D-630MX projectors.

Further, Sahara S2601, S2618, and S3618 Projectors with lamp codes17300563797088600-S, 17300363797094000-S, and 17300363797094000-S respectively can also use this lamp.

In addition to the above, the Osram P-VIP 180/230W 1.0 E17.5 E is ideal for ViewSonic PJ402 and PJ402D Projectors with the lamp code RLC-001. Other ViewSonic projector models such as PJ450D, PJ452D, and PJ455D with the alternate lamp code 17300363797094000-S can also use this replacement lamp.

IBM E400 and E500 Projectors having a lamp code of 73P4954 and alternate lamp code of 73P4966, Boxlight SP-650z with SP650Z-930 as lamp code, and GP Evergrow GP-DLP12 Projector can also use this replacement projector lamp.

The Osram P-VIP 180/230W 1.0 E17.5 U on the other hand can be used with Toshiba TDP-S8 and TDP-T9, projectors. So before you buy a replacement projector lamp keep in mind the lamp codes. BulbToGo.com offers both these bare lamps at a competitive price.