Ultra-thin hot cathode fluorescent lamp of liquid crystal television

Abstract

The invention discloses an ultra-thin hot cathode fluorescent lamp (English abbreviation: T-HCFL) of a liquid crystal television. The section of a lamp tube has a rectangular or elliptical thin structure, so that a hot cathode lamp tube has larger tube diameter and working current and has the advantages of high light efficiency and high brightness, and the thickness of the thin hot cathode lamp tube is reduced; in order to prolong life, a multi-filament hot cathode mode is adopted, namely a plurality of filaments work together during work, but each filament is in a derated working state; or one filament works and other filaments are in a standby state; once discovering that the running filament is broken under the monitoring of a lamp tube controller, the filament is switched to the second, the third, ......, the nth filament to work; in order to reduce overall thickness of a backlight source, a light reflecting film can be coated on the back face of each lamp tube and a light reflecting plate is not required to be arranged; and since the light efficiency is higher than that of the cold cathode fluorescent lamp, the number of lamp tubes is reduced, the cost is lower than that of the conventional cold cathode fluorescent lamp and is much lower than that of a white LED (Light Emitting Diode) backlight source, and the power consumption of the liquid crystal television is obviously reduced.

Description

technical field [0001] The invention relates to a liquid crystal television backlight, in particular to an ultra-thin hot cathode backlight for a liquid crystal television, English abbreviation: T-HCFL. technical background [0002] As the screens of LCD flat panel TVs (including plasma flat panel TVs) get bigger and bigger, their power consumption is also getting bigger and bigger. Taking a 47-inch - 52-inch LCD TV as an example, its power consumption has reached 200-300 watts, which is indeed a bit too big for most families. policy. If the screen is increased to 55 or 60 inches, its power consumption will increase greatly! Therefore, major TV manufacturers have adopted many new technologies to reduce the power consumption of the backlight, such as the use of cold cathode backlight (CCFL) brightness adjustable technology, Samsung has launched RGB-LED, white light-emitting diode liquid crystal in 2008 and 2009 TVs were immediately responded by Sony, Sharp and many domesti...

AI Technical Summary

Problems solved by technology

However, the disadvantages of cold cathode backlight (CCFL) are low brightness and low luminous efficiency, so it is difficult to be used for general lighting

The hot cathode lamp (HCFL) has high brightness and high luminous efficiency, but has a short life and a large diameter, with a diameter of 15mm to 20mm, so it is only suitable for civilian lighting, and it is difficult to be used as a backlight for LCD TVs.

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