Projection Projector
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Projection Projector
Teach you a few hands to maintain the whole coup projector lamp Raiders - projector lamp, lamp maintenance - education sector
With IT products and the rapid development of new audio-visual equipment, whether in teaching, business negotiation, or home entertainment areas to large demonstration area and shocking display known Projector The devices have become indispensable. When the brightness, contrast and resolution to set the basic parameters such as rising at the same time, Projector Lamp Also quietly great changes taking place.
We know that, in addition to display chip Projection Projector lamp is the most important supplies, it determines the performance of a direct projection image clarity and brightness. Working with the projection time, the brightness will naturally continue to be reduced, thus projecting the image will be less and less clear, when the projector lamp consumption to a certain extent, also to the point should be replaced. However, in order better to save users the cost of post-use, high cost of maintenance of the projection lamp also becomes more important, also very worthy of the majority of users in it more carefully. Principles of projection from the bulb
Type from the light point of view, Projector Bulbs can be divided into metal halogen bulbs and high pressure mercury lamp, which in turn can include UHP, UHE, etc., then a rookie is a xenon lamp.
Metal halogen bulb It by filling a metal halide bulb in its name, its advantage is cheap, replacement costs are lower. In the light bulb in a light state, the voltage across the lamp is generally about 60V, a high gas pressure inside the bulb, the filament in a semi-molten state, the temperature is as high as thousands of degrees, so the projector's cooling capacity requirements higher more generally used in larger LCD projector.
The disadvantage is short life, but life of 2000 hours, in the course of the metal halogen bulb's brightness will be very severe decay, the total working time of 1000 hours of the general effect of the projected image can also reluctantly accepted, and then continue to use down projection image becomes very bad. Currently, metal halogen bulbs are phased out projector bulbs domestic market, is replaced by cold Light source High-pressure mercury lamp.
UHE lamp UHE lamp is a class of ultra high pressure mercury bulb, more suitable for prolonged use. The prices are also relatively modest, probably about 2,000 yuan, the current mainstream is commonly used projection UHE. UHE lamp filtered infrared optical principle, given cold, heat is relatively small, can effectively reduce the projector power. This ultra high pressure mercury fillings Technology Bulbs often referred to as cold light bulb, the most prominent feature is the long life, usually can reach more than 3,000 hours, during working hours to 2000 hours, the brightness is almost no decay.
This bulb is not only normal use of time than metal halogen bulbs twice, and this light bulb performance curve smooth, high brightness, long time no significant decline in use of brightness, and the price is also more appropriate for most mainstream projection applications bulbs.
UHP lamp UHP lamp, which stands UltraHighPerformance, also belong to the high pressure mercury lamp, the longer life expectancy, the general nominal 6000 hours, the longest and even nominal 12,000 hours, 4000 hours total working time will not be noticeable brightness attenuation. Philips invented the light bulb is a patented technology, when the bulb failure will be immediately extinguished. Compared with the UHE lamp, not only in the same power dissipation, UHP lamp can produce a large amount of light, and can effectively suppress the flicker from happening, and form smaller, less attenuation of brightness, longer life.
Compared to the first two, UHP projector lamp is more ideal light source, but its patented technology for Philips monopoly, the price is high, generally above 3000 yuan, generally only high-end projector before will use it. However, with the increasing popularity of projectors and technology updates, some have begun to use the mid-UHP projection lamp.
Xenon lamp
Xenon lamp is the use of positive and negative electrode arc generated between the discharge of a light source, because of technical content is high, prices are more expensive, currently only used in high-end projector.
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how can i make a home made Projection Screen for my projector?
i saw you youtube some people was useing (bed) sheets is there a better way outher then just on the wall too
See the DIY Screen Forum (1st link below) at AVS Forum ... all sorts of ideas, advice. Also the link to an article at projector Central.
I can say from personal experience (I did a DIY screen with paint on a blank wall in my home theatre) that DIY screens can give excellent results for very little (ca $50) money.
Cheers.
DIY Home Made Projector Screen - How to Build a Projection Screen