An ultra-high-performance lamp, often known by the

Philips Koninklijke Philips N.V. (), commonly shortened to Philips, is a Dutch multinational conglomerate corporation that was founded in Eindhoven in 1891. Since 1997, it has been mostly headquartered in Amsterdam, though the Benelux headquarters i ...

trademark UHP, is a high-pressure

mercury arc lamp A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce light. The arc discharge is generally confined to a small fused quartz Fused quartz, fused silica or quartz glass is a glass consi ...

. These were originally known as ultra-high-pressure lamps, because the internal pressure can rise to as much as 200 atmospheres when the lamp reaches its operating temperature. It was developed by

in 1995 for use in commercial projection systems, home theatre projectors, MD-PTVs and video walls. Unlike other common mercury vapor lamps used in projection systems, it is not a

metal halide lamp A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typicall ...

, as it uses only mercury. Philips claims a lifetime of over 10,000 hours for the lamps. These lamps are highly efficient compared to other projection lampsa single 132

watt The watt (symbol: W) is the unit of power or radiant flux in the International System of Units (SI), equal to 1 joule per second or 1 kg⋅m2⋅s−3. It is used to quantify the rate of energy transfer. The watt is named after James Wa ...

UHP lamp is used by DLP manufacturers such as

Samsung The Samsung Group (or simply Samsung) ( ko, 삼성 ) is a South Korean multinational manufacturing conglomerate headquartered in Samsung Town, Seoul, South Korea. It comprises numerous affiliated businesses, most of them united under the ...

and

RCA The RCA Corporation was a major American electronics company, which was founded as the Radio Corporation of America in 1919. It was initially a patent trust owned by General Electric (GE), Westinghouse, AT&T Corporation and United Fruit Comp ...

to power their DLP

rear-projection TV Rear-projection television (RPTV) is a type of large-screen television display technology. Until approximately 2006, most of the relatively affordable consumer large screen TVs up to used rear-projection technology. A variation is a video projec ...

lines. It is used in many LCD and DL
video projectors

Known manufacturers of high-pressure discharge lamps (UHP or similar)

* EYE/Iwasaki (HSCR) (AC only), Japan based. * Osram/Sylvania (P-VIP / NeoLux) (AC only), Europe based company. * Panasonic, Matsushita (HS, UHM) (AC only), Japan based company. * Philips (UHP) (AC only), Europe based company. * Phoenix (SHP), Japan based company. * Ushio (NSH, UMPRD, NSHA), Japan based company. * Epson (E-TORL) (Made by EYE/Iwasaki), Japan based company. * In the initial UHP lamp development stage, Philips and Osram took a lead, and focused on AC (alternate current) technology and has cross patent sharing with each other. As a result, Japanese companies focuses on DC (direct current) technology to bypass European patents.

Chinese lamp manufacturers

Manufacturers mostly in China have been reported to be making inferior counterfeit lamps. In the UK, one lamp distributor was prosecuted for supplying counterfeit Epson lamps that seriously damaged an Epson projector in Germany. In India, 400 people complained of irritation and swelling in eyes after several China-made halogen lamps burst during a cultural program. As an increasing number of counterfeit lamps are being sold, projector manufacturers, such as Optoma and Epson stress the importance of authentic and original lamps. Optoma and Epson hold the biggest projector market share in DLP and LCD respectively.

Devices using UHP lamps

DLP rear-projection TV sets. *

Sony , commonly stylized as SONY, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. As a major technology company, it operates as one of the world's largest manufacturers of consumer and professional ...

LCD rear-projection TV sets. * Most digital projectors manufactured post 2001 (except

LED A light-emitting diode (LED) is a semiconductor Electronics, device that Light#Light sources, emits light when Electric current, current flows through it. Electrons in the semiconductor recombine with electron holes, releasing energy i ...

projectors) * Olympus ILP-2 high-intensity light source * Mitsubishi DLP projection televisions * Barco Sim7 series

LCoS Liquid crystal on silicon (LCoS or LCOS) is a miniaturized reflective active-matrix liquid-crystal display or "microdisplay" using a liquid crystal layer on top of a silicon backplane. It is also referred to as a spatial light modulator. LCoS was ...

simulation projectors *

Epson Seiko Epson Corporation, or simply known as Epson, is a Japanese multinational electronics company and one of the world's largest manufacturers of computer printers and information- and imaging-related equipment. Headquartered in Suwa, Nagano, ...

LCD projectors * Acer DLP projectors

References

{{reflist

External links

Philips, UHP lamp manufacturerTexas Instruments' DLP website
Gas discharge lamps