Backlight device and liquid crystal display device incorporating the same

Abstract

A backlight device includes a frame, at least one lamp unit each comprising a transformer and a discharge lamp structured into an integral and rigid unit, and also includes a circuit board for lighting the discharge lamp, which is disposed at the back surface of the frame and at which the transformer is mounted at. The transformer of the lamp unit includes: two terminal blocks having terminal pins; a bobbin having a primary winding and first and second secondary windings wound around an outer circumference of the winding core member; a magnetic core; and two lamp connecting terminals attached respectively to the terminal blocks and connected respectively to the first and second secondary windings, wherein the discharge lamp is attached to the transformer with electrodes of the discharge lamp connected directly to the lamp connecting terminals of the transformer, thus forming the lamp unit into an integral structure.

Description

technical field [0001] The present invention relates to a backlight device, and also to a liquid crystal display device incorporating the backlight device, and particularly to a backlight device in which a lamp as a light source is directly attached to a transformer, and to a backlight device incorporating such a backlight device LCD display device. Background technique [0002] A liquid crystal display (LCD) used as a display device of a liquid crystal monitor, a liquid crystal television, etc. does not emit light by itself, and thus requires an illumination system such as a backlight device. Among these backlight devices, there is an edge light type in which a cold-cathode lamp as a light source is arranged on one side of a light-conductive plate so that light emitted from the lamp is introduced into the light-conductive plate from the side and passed from the light-conductive plate. One main surface of the light diffusion plate is left, thereby illuminating the light dif...

AI Technical Summary

Problems solved by technology

In particular, the LCD device 200 uses a plurality of lamps 206, and thus uses a corresponding number of connectors 216 and 217 and lamp cables 214 and 215, so the above-mentioned assembly work inevitably involves a lot of manpower and financial resources.

In addition, the connectors 216 and 217 and the light cables 214 and 215 are required to withstand high voltage, so expensive connectors and light cables have to be used, thereby increasing the product cost

Also, since the high voltage transformer 213 is mounted on the inverter circuit board 209 attached to the back side of the backlight device, it is difficult to reduce the thickness of the backlight device, and at the same time, since the lamp 206 and the high voltage transformer 213 are electrically connected to each other through the connectors 216 and 217 , so taking into account the poor connection, a protective circuit device must be provided, which also increases the product cost

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