Showing posts with label Sanyo. Show all posts
Showing posts with label Sanyo. Show all posts

Tuesday, March 20, 2018

What Makes a Projector? -LCD

Last time we spoke I talked about what a DLP Video Projector is.  How it works as well as its Pros and Cons.  From this point forward, I will be discussing what makes another large segment of the projector market, LCD Projectors.

LCD (Liquid Crystal Display) is a subtraction display technology versus DLP, additive display technology.  DLP Adds layers of colors to make an image where as LCD blocks pixels to take away color for dark area.  One is not better than the other. One of the main advantages of LCD is the lack of a color wheel.  This means one of DLP's main detriments(rainbowing) is not a concern.  LCD uses 3 colored filters to break the light into Red, Green and Blue.  These are then re-combined before final projection.

LCD Projectors were the first projectors on the market.  They quickly replaced the older and antiquated CRT (cathode ray tube) Projectors.  Their portable size and surprisingly bright image( for the time) was a welcome change.
You would think this type of technology was rather new, but in reality its almost 35 years old.  The first 'Light Valve' was pioneered in 1968 at RCA by John van Raalte.  It took until 1984 for him to work out the issues such as being able to control the 'light valves' in a meaningful way for a projector.  Since each pixel is arranged in a grid pattern, there needs to be a way to address each pixel.  This also showed the first use of negating the 'screen door affect' of each pixel being too obvious and looking like a grid of color.

It wasn't until the mid to late 1990s that LCD computer projectors became more common place. Before then, the most common form of LCD projector was a flat panel that was set atop a common overhead projector.

Once the LCD digital projector became common place it rapidly advanced.  At first the contrast was an issue at low brightness's.  The implementation of an auto iris resolved that.  This Iris physically blocks the lamps light beam at a specific level to balance the light needed to display the color required by the video.

Both LCD and DLP Projectors use lamps and lenses. Everything in between is quite different.
The lamp in an LCD projector starts off by focusing its light through a lens in the front of the lamp. This lens ensures the maximum amount of light hits the first lens of the projector.  The lens ' job is to focus the lamp light onto the the next piece of glass which is a color prism.  This prism reduces the light to its core colors of Red, Green and Blue.  The now filtered light is passed through a set of mirrors and multiple Dichroic filters.

The 3 filters further filter the lights to single color channels. Each of the 3 core colors have their own light path and their own LCD panel. Directly prior to passing through the LCD panel the light is balanced by 2 polarized glass panels.  These are adjusted in the factory so that each color is of equal intensity. This is critical because once the light passes through the LCD panel it is now 1/3 of the picture.  It is combined with the other 2 colors to form the full color image.  If any of the 3 colors are more dim or bright than each other, the image will look out of balance and not vivid.
The Lamp in an LCD projector is different as well.  The lamps usually have an optical lens rather than a filter lens as in a DLP lamp.  There is no need to block the UV and IR as it leaved the lamp.  The UV is already blocked by the glass, but the IR is not going to affect a color wheel so it can be filtered out after it leaves the lamp.

At one point around 2010 DLP projectors were surpassing LCD in quality but now the differences can be minuscule in the image quality.  LCD is still quite popular and posses a slightly large part of the home theater market but only barely.

Either projector can serve you well for most purposes.  Once type of lamp is not necessarily more expensive either.  Ideally you want to look at the picture.

If the image looks how you want it to look then LCD is the right technology for your home theater.  Maybe DLP looks better since it does have slightly deeper colors?  At that point it is up to your personal preference.   Be sure to follow us for our next post where I will discuss the other types of display technology such as LCOS and DiLA.

No matter which you choose you can get your lamp from us with the confidence that you are purchasing from a company who knows lamps.

Thursday, February 15, 2018

Tips to Identify Your Projector Lamp

There are thousands of different projector lamps. If you don't believe me, look at our Website in the Epson Section, as an example.  Epson alone has around 100 different lamps. Last count we had about 3100 unique items with close to 20,000 associated Model numbers. That is a lot of info.

Occasionally we get a call or email asking for a lamp but the customer is not sure of the brand or model.  When you are not the one replacing the lamp and you have to buy the lamp, it can be stressful and difficult without that info.

There are a few tips that I can share that will help. 

First and foremost ask your tech / installer for as much info as possible.  The ideal info is the model number off the projector.  All projectors have a data plate.  Its the sticker or metal plate that has all of the units pertinent info such as the model, serial number, power rating and any certifications.  That plate is usually located on the underside of a projector.  The underside if its sitting on a table. When that is the case, getting that info is easy.

Now say the projector is mounted 30 feet in the air, and you have to rent a lift to get the old lamp out?

The data plate might be blocked by the mount.  It may also have faded from years of sunlight on the sticker.  What can you do?

We have a lot of info at our fingertips.  While we prefer the proper info such as the model number or lamp number, we can usually identify a lamp pretty precisely.

What I am going to teach you is a last ditch option.  After you have exhausted all other options see how this goes.

I'll start with the useless info.  All housings have numbers on them.  Sometimes they mean things.  Many times they don't.

Most lamps will list the type of plastic they are made from. This is one of two types.  PPS and LCP.

PPS is Polyphenylene Sulfide. Its a higher temp thermoplastic that usually has some glass fiber re-enforcing.  Commonly listed as PPS-GF40 (Polyphenylene Sulfide Glass fiber 40%).  You can visually tell by the look of the plastic.  It will be glossy and hard.

The other kind of plastic used is LCP (liquid Crystal Polymer).  It is no better or worse.  I can only speculate on why one would be used over another as they compare almost the same with only negligible differences.

If you see PPS-GF40/GF30 or LCP-GF40, you can ignore those numbers.  They are only useful to the plastic recycling center.

There may also be a 2 digit number. That is usually a mold ID.  When the lamp housing was molded it was done so in a mold that had a number in it. That is for quality tracking.  Also not much help for finding your mystery lamp.

There may be other random letters and numbers. Most of them will be useless.

Here is what you WANT to look for.

Flip the lamp over and look at the back of your bulb.  Most lamps will have markings on the bulb unless its a cheap knock off.  You know how I feel about those.

That bulb will have some numbers.  Those will be helpful. They may not ID the lamp entirely but it will narrow it down immensely.

Refer to this chart:

Ushio:  Look for NSHxxxY(x= numbers, y= letter suffix)  or NSHAxxxY.  NSH refers to a DC (direct current bulb) and should have at least one wire physically attached. NSHA is for AC(alternating current bulb) and will have 2-3 terminals that can have a connector attached via screws. Many Ushio bulbs are purpose made for a specific manufacturer.  For instance, NSH200EDC is a 200W DC lamp made for Eiki with 3 terminals instead of 2.

Philips:  The first number on the sticker is the part number.  In this image the 636 is the part #.  The 90 indicates that this is an aftermarket bulb for Original Inside lamps.
UHP Philips Bulb
We can match that info to a handful of lamps.

Osram:  There will be a sticker on the reflector or text on the read of the ceramic. You are looking for the "PVIP" data.  It will say P-VIP xxx(x= wattage) then the arc gap(1.0 or 0.9 or 0.8) which is the spacing in millimeters inside the arc-tube.  Then the reflector size which will be a P (for parabolic) or E( for elliptical) and a number.

Phoenix: This is the most difficult but fortunately its also rare.  There will be a short number such as SHPxx on an OEM.  The aftermarket lamps are harder.  They use a 3 character listing such as GX4 or SX5.  They have the wires permanently attached and usually are in older lamps.  Even so, if we know you need a lamp with a Phoenix bulb it will still eliminate a lot of variables.

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Knowing the brand of the projector will then get us even closer if not to the exact model.

Lastly take a picture for us.  We look at lamps all day long. Whether in our Quality Control Department or by our warehouse staff, some of us can ID a lamp by just seeing it.

Set the lamp on a nice clear background.  White table or solid lighter colored surface.  Put a piece of paper under it if you aren't sure.  Then take a picture looking straight down. Make sure to get the connector in the shot.  Then take another from the bottom with the lamp flipped over.

Refer to the image below. The first two pictures show a POA-LMP94 from a PLV-Z4 /PLV-Z5.  The third picture is the same lamp but while its a 'nice' picture, its not recognizable as easily.



Ideally of course, get the model number.  Even if you have what you believe is the proper Lamp ID , use the Model number.  It is the best way to guarantee you are sent exactly what you need and nothing less.


We can ID most lamps the same day as our staff is highly trained and well versed in finding the lamp you need. Contact us Monday through Friday 9am to 5pm via phone or Chat or anytime at Sales@Purelandsupply.com and we will reply the following business day.











Tuesday, November 14, 2017

Brands we sell continued...

Pureland Supply only sells the highest quality lamps. Our lamps are aftermarket housings engineered to fit the same as the OEM from the manufacturer. 

The brands we carry are:

Acer
Ask
Barco
BenQ
Boxlight
Canon
Christie
Dell
Digital Projection
Dukane
Eiki
Epson
Hewlett Packard
Hitachi
IBM
Infocus
JVC
Knoll
LG
Liesegang
Marantz
Mitsubishi
NEC
Optoma
Panasonic
Philips
Planar
Plus
Projection Design
Proxima
RCA
Runco
Samsung
Samsung
Sanyo
Sharp
Sim2
SmartBoard   
Sony
Toshiba
Ushio
Vidikron
Viewsonic
Vivitek

Contact us Today at www.PurelandSupply.com or give a call and speak to a real person instead of a recording. We are here 9-5 Eastern Standard time. You can also email us at Sales@PurelandSupply.com