JPH02195380A - Illuminator - Google Patents

Abstract

PURPOSE:To easily detach a supporting base and illuminating blocks and to readily replace cold cathode tubes by notching the almost central part of the bottom of the supporting base so as to provide windows and inlaying the illuminating blocks fitting the cold cathode tubes on a supporting board into these windows. CONSTITUTION:Two windows 12 are provided the almost central part of a reflecting plane provided on the bottom. The respective illuminating blocks 14 fitting the cold cathode tubes 2 on the supporting board 13 possessing the reflecting plane are inlaid in the two windows 12. Fitting holes 16 are provided on the illuminating blocks 14, and the supporting base 1 is formed into one body with the blocks 14, by the fitting holes together with screws 17, so as to cover the windows 12 of the supporting base 1. Since the cold cathode tubes 2 are disposed on the illuminating blocks 14 which are separable from the supporting base 1 in such a way, the cold cathode tubes 2 can be readily replaced without detaching a translucent reflecting board, a diffusion board, and a liquid crystal display panel.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a lighting device used for pack illumination of a liquid crystal display device that can be used in burner computer equipment, office automation (OM) equipment, liquid crystal television set, etc. It is related to.

BACKGROUND OF THE INVENTION Conventionally, this type of lighting device has had a configuration as shown in FIGS. 3a and 3d. In the figure, 1 is a support stand, and this support stand 1
A cold cathode tube 2 is mounted on the inner bottom of the tube, a rubber member 3 fitted into both ends of the cold cathode tube 2, and a column 4 provided at the bottom of the support base 1.
Fixed by The lead wires 6, 6, 7 and 8 drawn out from both ends of the cold cathode tube 2 are connected to the square groove 9 of the support base 10.
It is pulled out to the side of the support base 1. Among these, the lead wires 6, 6 are pulled out from the groove 1o on the bottom of the flat support 1, routed through the back surface of the support 1, and then passed through the groove 11 again into the support 1. The lead wires 7 and 8 are tied together and pulled out in one direction.

In Figure 3, a translucent reflector and a diffuser plate are mounted on the arrow dimensions M x M' to make the light uniform, and on top of these, a liquid crystal display panel is laminated on the arrow dimensions BXB'. It was fixed to a support stand.

Problems to be Solved by the Invention In such a conventional configuration, when replacing a cold cathode tube for maintenance or the like, a translucent reflector plate and a diffuser plate are required.

The disadvantage is that the liquid crystal display panel must be removed, which is very time-consuming especially when assembled as a set.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a lighting device in which cold cathode tubes can be easily removed.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a support plate having a bottom surface and an open front surface, with a window cut out approximately at the center of the bottom surface, and a support plate that closes the window. A lighting block having cold cathode tubes attached thereto is fitted into the window so that the cold cathode tubes are placed inside the support base.

By providing a lighting block to which working cold cathode tubes are attached and which can be removed from the support stand, the support stand and the lighting block can be easily removed and the cold cathode lamps can be easily replaced.

Embodiment Below - An embodiment of the present invention will be explained using FIGS. 1 &, b and 2 a and b. In addition, Fig. 1.

In Figure 2, parts that are the same as those in Ward 3 are given the same numbers. In the figure, reference numeral 1 denotes a box-shaped support stand that is rectangular and has a bottom and an open front. Two windows 12 are provided approximately in the center of the reflective surface provided at the bottom. Illumination blocks 14 each having a cold cathode tube 2 attached thereto are fitted into a support plate 13 which is made of the same material as the support base 1 shown in FIG. 2 and has a reflective surface. Figure 2a
2 is a top view of the illumination block 14, and FIG. 2 is a side view of the illumination block. This lighting block 14 is connected to the support plate 13
A cold cathode tube 2 is disposed in the center of the cold cathode tube 2, and rubber members 3 are fitted into both ends of the cold cathode tube 2, respectively, and are fixed by pillars 4 provided on a support plate 13. , and support plate 1
Hole 16 through which lead wires 15.8 and 7.8 pass through both ends of 30
is provided, and lead wires 6.6.7.8 are drawn out from the back side. The lighting block 14 having the above configuration is provided with a mounting hole 16, and the support 1 is attached to the lighting block 14 so that the window 12 of the support 1 is covered with a screw 17 along with the mounting hole provided in the support 1. It is combined with. Figure 1a,
b shows a state in which the lighting block 14 is attached to the window 12 of the support base 1. As is clear from the figure, the lead wires 5, 6.7° 8 of the cold cathode tube are all wired on the back side.

These are generally used as backlighting for transparent panel LCD displays.

A translucent reflector and a diffuser plate are laminated on the arrow dimension M x M' in Fig. 1a to make the light uniform.
A liquid crystal display panel is laminated on B'.

It is fixed to the support base 1 with a frame.

In this way, by arranging the cold cathode tubes 2 in the illumination block 14 that can be separated from the support base 1, the cold cathode tubes 2 can be installed without removing the translucent reflector, diffuser, or liquid crystal display panel. Easy to replace.

Effects of the Invention According to the present invention, the cold cathode tube can be freely replaced from the side other than the reflective surface of the support base, and it can be assembled without being influenced by the cold cathode tube in terms of manufacturing, making maintenance easier. Also, the effect of easy replacement of cold cathode tubes can be obtained.

[Brief explanation of the drawing]

1A and 1B are a top view and a side view of a lighting device according to an embodiment of the present invention, FIGS. 2A and 2B are a top view and a front view showing a lighting block used in the device, and FIGS. 3 & b 1 is a top view and a side view of a conventional lighting device. 1...Support stand, 2...Cold cathode tube-12
...Window, 13...Support plate, 14...
...Lighting block.

Claims (1)

[Claims] A lighting block is constructed by cutting out approximately the center of the bottom of a support base having a bottom and an open front, and installing a cold cathode tube on a support plate that closes the window. 1. A lighting device, characterized in that the lighting device is fitted into the window so as to fit into the window.