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Backlight comprising hot cathode fluorescent lamp

A technology of backlight and hot cathode, which is applied in the field of backlight, can solve the problem that the hot cathode fluorescent lamp has not been overcome, and achieve the effect of reducing the area of ​​the picture frame

Inactive Publication Date: 2010-02-17
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, research and development using CCFLs as backlight units has been prevalent until today, and as a result, the disadvantages of HCFLs have not been overcome in practice.

Method used

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  • Backlight comprising hot cathode fluorescent lamp
  • Backlight comprising hot cathode fluorescent lamp
  • Backlight comprising hot cathode fluorescent lamp

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] The inventors of the present application considered that instead of adopting cold cathode fluorescent lamps (CCFL), which are currently the mainstream, as backlights suitable for liquid crystal displays whose screen size is increasing rapidly, the inventors of the present application considered switching to the use of individual lamps compared to cold cathode fluorescent lamps. The tube can get a hot cathode fluorescent lamp (HCFL) with greater output power, and turn to its research and development. The reason for considering such a shift is that by using the "high output power" feature of hot cathode fluorescent lamps, the contrast of LCD TVs can be increased, and the picture quality including moving images can be improved. At the same time, it is better than cold cathode fluorescent lamps. For fluorescent lamps, the number of fluorescent lamps used as backlights can also be greatly reduced, which can reduce costs.

[0074] In addition, compared with backlights using c...

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PUM

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Abstract

Disclosed is a backlight (100) comprising a hot cathode fluorescent lamp (10). Specifically disclosed is a backlight (100) comprising a hot cathode fluorescent lamp (10) having a bulb (12), a base (50) provided on an end portion of the hot cathode fluorescent lamp (10), a socket (40) to be connected with an external terminal (52) of the base (50), and a lamp holder (75) for holding the hot cathodefluorescent lamp (10). The external terminal (52) of the base (50) extends in a direction generally perpendicular to the longitudinal direction (92) of the bulb (12) (for example, in a direction opposite to the screen direction (90)), and the lamp holder (75) comprises an elastic member (77) which enables to move the hot cathode fluorescent lamp (10) along the longitudinal direction (92) of the bulb (12).

Description

technical field [0001] The present invention relates to a backlight equipped with a hot cathode fluorescent lamp, in particular to a backlight for a large-screen TV or a billboard. Background technique [0002] At present, the light source of the backlight unit of the liquid crystal display mainly adopts the cold cathode fluorescent lamp. A cold cathode fluorescent lamp is used as a light source for a backlight unit that requires thinning because it is suitable for reducing the diameter (see, for example, Patent Document 1). [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 56-73855 [0004] In recent years, the size of the liquid crystal display has continued to increase, and the backlight unit has also developed in the direction of size. Due to the increase in size of the backlight unit, if a cold cathode fluorescent lamp is used as a light source, not only the lighting circuit becomes complicated, but also the power consumption increases. [0005] M...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S2/00F21V19/00F21Y103/00
CPCG02F1/133604
Inventor 清水伸浩大竹史郎荒川刚
Owner PANASONIC CORP