JPH0250127A - Method and device for mounting back light - Google Patents

Abstract

PURPOSE:To easily perform repair operation in safety by mounting the back light on the display surface of a liquid crystal display device movably in a right-left direction. CONSTITUTION:At the upper end part and lower end part on the back of the liquid crystal display device, U-shaped guide rails 14a and 14b are fixed horizontally and a roller 17a is engaged with the guide rail 14a at the upper end part to enable right-left movement on the display surface 13 of the liquid crystal display device 11. Further, a roller 17b is engaged with the guide rail 14b on the lower end part to suppress the front-rear swing of the display surface 13. Then those two rollers 17a and 17b are fixed to a frame 19 and a fluorescent lamp which is the back light 12 is fixed to the frame 19. Consequently, the back light 12 is easily moved in the right-left direction on the display surface, so the replacement of the back light 12 and the repair operation for the liquid crystal display device 11 or printing control board 18 is easily performed in safety.

Description

[Detailed Description of the Invention] [Summary] The present invention provides a mounting method for mounting a backlight movably in the left and right directions on the display surface of a liquid crystal display device, and a mounting method for mounting a backlight on the display surface of a liquid crystal display device so as to be movable in the left and right directions, and a method for mounting a backlight on the display surface of a liquid crystal display device, A U-shaped guide rail fixed horizontally, a roller that engages with the guide rail at the upper end and is movable in the left and right direction with respect to the display surface of the liquid crystal display device, and a roller that engages with the guide rail at the lower end. A mounting device equipped with a roller that suppresses shaking in the front and rear directions with respect to the display surface, and a backlight equipped with the two rollers allows repair and inspection work of liquid crystal display devices and backlights to be performed easily and safely. This is what I did.

(Industrial Application Field) The present invention relates to a method and device for mounting a bank light, and more particularly to a method and device for mounting a bank light in which the backlight of a transmissive liquid crystal display device can be moved in the horizontal direction with respect to the display surface. Regarding.

[Conventional technology]

Conventional transmissive liquid crystal display devices are used for displaying stocks, for example, and a bank light is used to provide illumination from behind the liquid crystal display device in order to enhance the contrast of the display. This transmission type liquid crystal display device, as shown in FIG. 5, has two glass plates 27a.

When voltage is selectively applied to the liquid crystal molecules 23 sandwiched between the electrodes 27b and sealed with the seal 22 using the transparent electrode 24, the arrangement of the liquid crystal molecules 23 changes as shown in the figure, forming a light transmitting part and a light shielding part. can do. By irradiating this transparent portion with a backlight 12, transmitted light 26 is selectively emitted, thereby making it possible to perform a liquid crystal display with contrast.

To explain the structure of the backlight of a conventional liquid crystal display device using FIG. 2, a bank light 12 such as a fluorescent lamp is fixedly installed at a predetermined position behind the liquid crystal display device 11. A printed control board 18 was arranged to control the liquid crystal display.

During repair/inspection work, if the device is to be repaired from the front, the liquid crystal display device 11 must be opened and closed, and if the device is to be repaired from the back, the printed control board 18 must be opened and closed. ing.

[Problem that the invention seeks to solve]

In this manner, the conventional backlight is mounted fixedly at a predetermined position within the liquid crystal display device 11. Therefore, when replacing the fluorescent lamp of the backlight 12, the entire liquid crystal display device 11 must be opened if the device is for front repair, or the entire printed control board 18 must be opened if the device is for back repair. There was a problem in that the work required a long time. Furthermore, when repairing the printed control board 18 at the back using a front repair device, or repairing the front liquid crystal display device 11 using a back repair device,
The fixed pantara eye 2 between them gets in the way and has to be removed each time before repair work is done, which is very troublesome.

Bank lights 12, which are used for the large display screens of conventional stock display devices, are mainly 110W long ones (length 2.
4 m) fluorescent lamps are used, making it difficult to install and remove them.Furthermore, if the liquid crystal display device 11 is installed on a high platform 21 to improve the visibility of the display device, repair and inspection work becomes difficult. Sometimes it is necessary to proceed with the work by moving the ladder little by little, which is time consuming and dangerous.

As described above, conventional fixed backlights require time-consuming replacement and repair work and are highly dangerous during work, so improvements to these backlights have been desperately needed.

The present invention was created in view of the above points, and an object of the present invention is to provide a mounting method for a bank light and an apparatus therefor, which can easily and safely perform backlight replacement and repair work of liquid crystal display devices, etc. purpose.

[Means for solving problems]

In order to achieve the above object, the present invention provides a method for mounting a backlight that illuminates from behind a transmissive liquid crystal display device, in which the backlight is mounted so as to be movable in the left and right directions with respect to the display surface of the liquid crystal display device. A mounting method for a backlight that illuminates a transmissive liquid crystal display device from behind, and a backlight mounting device that illuminates a transmissive liquid crystal display device from behind. A fixed U-shaped guide rail, a roller that engages with the guide rail at the upper end and is movable in the horizontal direction with respect to the display surface of the liquid crystal display device, and engages with the guide rail at the lower end. The present invention is constituted by a backlight mounting apparatus characterized in that it is equipped with a roller that suppresses shaking in the front-rear direction with respect to the display surface, and a backlight that includes the two rollers.

[Effect]

As shown in FIGS. 1 to 3, the present invention employs a mounting method in which the backlight 12 is movably attached to the display surface 13 of the liquid crystal display device 11 in the left-right direction, and the backlight 12 is pulled out from the side. The backlight can be replaced easily and safely.

Liquid crystal display device 1 for front repair equipment and back repair equipment
1 or the printed control board 18, if the backlight 12 sandwiched between them is an obstacle, you can easily move it to the side and work on it, saving you the trouble of removing the backlight 12. .

In addition, U-shaped guide rails are fixed horizontally to the upper and lower ends of the back of the liquid crystal display device, and the guide rails are engaged with the guide rails at the upper end portion to move horizontally from side to side with respect to the display surface of the liquid crystal display device. A backlight mounting device comprising: a movable roller; a roller that engages with the guide rail at the lower end to suppress swinging in the front-rear direction with respect to the display surface; and a backlight comprising the two rollers. This provides a mounting means that can suitably move the Ba-Tuta light in the left and right direction.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

Each figure in Figure 1 is a diagram showing the mounting state of the backlight in one embodiment of the present invention, in which (a) is a front view, (b) is a side view, and each figure in Figure 2 is a figure 1 (b). FIG. 3 is an enlarged view of part A of FIG. 1(b), and FIG. 4 is an enlarged view of part B of FIG. FIG. 5, which is a perspective view of the device, is a sectional view illustrating the backlight effect of a transmissive liquid crystal display device.

In the figure, 11 is a liquid crystal display device, 12 is a bank light, 13 is a display surface, 14a and 14b are guide rails, 1
5 is an upper end, 16 is a lower end, 17a and 17b are rollers, 18 is a printed control board, 19 is a frame, 20 is a groove,
21 indicates a stand.

This example is a method and device for mounting a backlight in a transmissive liquid crystal display device that displays stocks.

The method of mounting the backlight in this embodiment is to mount the backlight movably in the left and right directions on the display surface of a liquid crystal display device. To explain this with reference to FIG. 1(a), the backlight 12 disposed behind the liquid crystal display device 11 when viewed from the display surface 13 of the liquid crystal display device 11 moves in the left and right direction (as indicated by the arrow X in the figure).

It is mounted so that it can move in the Y direction.

By doing so, the backlight 12 can be pulled out from the side and the backlight can be replaced easily and safely at the same location. Also, as shown in Figure 1(b),
Since the backlight 12 is sandwiched between the liquid crystal display device 11 and the printed control board 18 that controls it, even if the device is repaired from the front or the back, the backlight 12 is sandwiched between the liquid crystal display device 11 and the printed control board 18. If the backlight 12 in between is an obstacle when repairing, it can be easily moved to the side, resulting in very good workability and shortening the working time.

The following mounting device specifically implements this mounting method.

The backlight mounting apparatus of this embodiment is shown in Fig. 1(a) (
As shown in b), there are horizontal U-shaped guide rails 14a at the upper and lower ends behind the liquid crystal display device.

14b is fixed, and the roller 17a is engaged with the guide rail 14a at the upper end to make it movable in the left and right directions (in the directions of arrows X and Y in FIG. 1(a)) with respect to the display surface 13 of the liquid crystal display device 11. , and a roller 1 is attached to the guide rail 14b at the lower end.
These two rollers 17a and 17b are engaged with each other to suppress shaking in the front and back direction with respect to the display surface 13.
is fixed to a frame 19 (see FIG. 1(b)), and a fluorescent lamp, which is a backlight 12, is fixed to the frame 19. The backlight 12 here uses a 110 W fluorescent lamp similar to the conventional one.

FIGS. 2(a), 3(b) and 3 are enlarged views of portions A and B indicated by dashed-dotted lines in FIG. 1(b).

As shown in FIG. 2(b), the guide rail 14a is formed with a groove 20, and by having a structure in which the roller 17a fits, even when the backlight 12 is moved laterally and returned to its original position. The predetermined position of the bank light 12 can be easily confirmed.

FIG. 4 shows a state in which the backlight mounting apparatus of this embodiment is attached to an actual liquid crystal display device 11.

As described above, with the backlight mounting method and device of this embodiment, the backlight 12 can be easily moved in the left and right direction (in the direction of the white arrow) with respect to the display surface, so that the backlight 12 can be easily replaced. or liquid crystal display device 1
1 or the printed control board 18 can now be performed easily and safely.

This has made it easier and safer to replace backlights and repair LCD devices.

[Brief explanation of the drawing]

The first figure shows the mounting state of the backlight in an embodiment of the present invention, in which (a) is a front view, (b) is a side view, and the second figure is a figure 1 (b). This is an enlarged view of part A of (a
) is a side view, (b) is a rear sectional view, FIG. 3 is an enlarged view of part B of FIG. 1(b), FIG. 4 is a perspective view of a liquid crystal display device in an embodiment of the present invention, and FIG. FIG. 2 is a cross-sectional view illustrating the backlight effect of a type liquid crystal display device. [Effects of the Invention] As described above, the backlight mounting method and device of the present invention enable the backlight to be moved in the horizontal direction with respect to the display surface of the liquid crystal display device. , 12 is a backlight, 13 is a display surface, 14a, 14b are guide rails, 15 is an upper end, 16 is a lower end, 17a, 17b are rollers, 18 is a printed control board, 19 is a frame, 20 is a groove, 21 is a Show the stand.

Claims (2)

[Claims] (1) In a method of mounting a backlight (12) that illuminates a transmissive liquid crystal display device (11) from behind, the backlight (12) is directed to a display surface (13) of the liquid crystal display device (11). A backlight mounting method characterized in that the backlight is mounted so as to be movable in the left and right direction. (2) In a mounting device for a backlight (12) that illuminates a transmissive liquid crystal display device (11) from behind, the upper end portion (15) and the lower end portion (
A U-shaped guide rail (14) fixed horizontally to
a, 14b), a roller (17a) that engages with the guide rail (14a) of the upper end (15) and is movable in the left-right direction with respect to the display surface (13) of the liquid crystal display device (11); A bag comprising: a roller (17b) that engages with a guide rail (14) at a lower end (16) to suppress swinging in the front-rear direction with respect to the display surface (13); and the two rollers (17a, 17b). A backlight mounting device comprising a light (12).