What is a cold cathode used for?
A cold cathode fluorescent lamp (CCFL) is a type gas-discharge lamp similar to linear fluorescent or compact fluorescent lamps. CCFLs are used in a number of different specialty applications, such as cold-weather lighting, display back lighting, and signage.
Are cathode lamps cold?
A cold cathode is a cathode that is not electrically heated by a filament. A cathode may be considered “cold” if it emits more electrons than can be supplied by thermionic emission alone. It is used in gas-discharge lamps, such as neon lamps, discharge tubes, and some types of vacuum tube.
What is cold cathode UV?
Cold cathode germicidal lamps have favorable operating characteristics at reduced temperatures. They are, therefore, widely used in walk-in refrigerators and holding rooms. STER-L-RAY® Cold Cathode germicidal lamps are well suited for disinfection of air and surfaces due to their long life and low depreciation.
Which following is a cold cathode lamp?
Cold cathode lamps: Neon lamp, neon sign tubes, sodium vapor lamp. Hot cathode lamps: mercury vapor lamp (medium pressure), and fluorescent tube (low-pressure mercury-vapor lamp).
Which of the following lamps is a cold cathode lamp?
Cold cathode lamps: Neon lamp, neon sign tubes, sodium vapor lamp.
Which of the lamp is cold cathode lamp?
Is Tubelight a cathode ray tube?
The UV light is converted into standard visible light using a phosphor coating on the inside of the tube. The most common fluorescent lamp is the hot cathode: Parts: This lamp consists of a glass tube filled with an inert gas (usually argon) at low pressure.
Which lamp gives highest lumens watt?
Mercury-vapor lamp
- A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce light.
- Mercury vapor lamps are more energy efficient than incandescent and most fluorescent lights, with luminous efficacies of 35 to 65 lumens/watt.
Which electric discharge lamp gives highest lumens per watt?
Mercury vapor lamps are more energy efficient than incandescent and most fluorescent lights, with luminous efficacies of 35 to 65 lumens/watt.
What is a cold cathode tube?
A cold cathode is a cathode in a gas-filled electron tube that is not heated by a filament. The voltage potential within the tube is sufficient to ionize the gas and cause the current to flow.
What is the cold cathode used for?
The cold cathode is a device for electron field emission replacing the hot filament in vacuum electronics. High-power high-frequency devices such as the TWT are still the backbone of the high-power amplifier.
How are electrons produced in cold-cathode tubes?
Joan Yater, in Reference Data for Engineers (Ninth Edition), 2002 The electrons in a cold-cathode tube are produced by bombardment of the cathode by ions and/or by the action of a localized high electric field.
How does a cold cathode gauge work?
Cold cathode gauges generate a plasma which is confined by electrical and magnetic fields and ions are extracted to a cathode plate of some sort. CCFL backlight efficiency should be considered from two perspectives.
What is a cold cathode fluorescent light (CCFL)?
Gary Vaughn, in Analog Circuit Design, 2011 The liquid crystal display (LCD) has become ubiquitous. The LCD utilizes a cold cathode fluorescent lamp as a light source to back light the display. The CCFL requires a high voltage AC supplies for operation.
