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Driving unit of fluorescent lamp and its driving method

By introducing a switching device into the fluorescent lamp driving unit of the LCD device to drive each fluorescent lamp independently, the limitation of a single inverter driving multiple fluorescent lamps in the existing technology is solved, the backlight modulation technology is realized, the display quality of moving images is improved, and the display quality is reduced. cost.

Inactive Publication Date: 2005-10-19
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since multiple EEFLs 41 in the prior art fluorescent lamp driving unit shown in FIG. 5 are driven by the same inverter 19, the above-mentioned backlight modulation technology cannot be applied.

Method used

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Examples

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Embodiment Construction

[0039] Embodiments of the invention are described in detail hereinafter, examples of which are illustrated in the accompanying drawings.

[0040] Figure 7 A fluorescent lamp driving unit according to the principles of the invention is shown. Figure 8 show Figure 7 Fluorescent lamp driver unit shown.

[0041] refer to Figure 7 and 8 A fluorescent lamp driving unit according to the principles of the present invention may include, for example, a backlight unit and a driving unit.

[0042] In one aspect of the present invention, the backlight unit may include a plurality of fluorescent lamps 61, for example. In another aspect of the present invention, the plurality of fluorescent lamps 61 may be provided as external electrode fluorescent lamps (EEFL) 61 . For example, each fluorescent lamp 61 may comprise a suitable transparent glass tube, a fluorescent material coated on the inner surface of the tube, and a discharge gas disposed within the tube. In yet another aspect of ...

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PUM

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Abstract

The invention provides a fluorescent lamp driving unit and driving method thereof. The fluorescent lamp driving unit includes fluorescent lamps, wherein each fluorescent lamp includes a first end and a second end opposing the first end; an inverter for driving the plurality of fluorescent lamps to emit light; and a controller for electrically connecting and disconnecting the plurality of fluorescent lamps to and from the inverter.

Description

technical field [0001] The principles of the present invention relate generally to liquid crystal display (LCD) devices. More specifically, the principle of the present invention relates to a fluorescent lamp driving unit and a driving method thereof, wherein the fluorescent lamp driving unit can independently drive each fluorescent lamp in a backlight unit. Background technique [0002] As information and communication technologies continue to develop, display devices have become more important. Conventionally, a cathode ray tube (CRT) has been used as a display device due to its ability to display color images with high brightness. However, CRTs are relatively large and heavy compared to other more recently developed types of flat panel display devices. Therefore, many applications replace CRTs with flat panel displays (e.g., liquid crystal display (LCD) devices, electroluminescence display (ELD) devices, plasma display panels (PDP), etc.), which have large display areas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G02F1/1335G09G3/34H05B37/00H05B41/14H05B41/24H05B41/26H05B41/282
CPCG09G3/3648G09G2320/064G09G3/342H05B41/2821G09G3/3406H05B41/245A47L25/005A47L7/0028
Owner LG DISPLAY CO LTD