JPH04261577A - Cooling device of indicator - Google Patents

Abstract

PURPOSE:To constitute the device so that the indicator can be cooled enough even if a temperature of the indicator rises exceeding a prescribed temperature by providing a forced fan so as to come into contact with a ventilation flue being in the vicinity of a center part of a case body. CONSTITUTION:A forced fan 10 is provided on a case body 1 which comes into contact with the vicinity of the center part of a ventilation flue. That is, the forced fan 10 attached so as to come into contact with the ventilation flue of the center part of the case body 1 is started by turning on a switch of the forced fan 10, in the case a temperature in the indicator exceeds a prescribed temperature. Therefore, air quantity and wind pressure are both increased, both ends from the center part become exhaust ports 5, respectively and air is exhausted, and sufficient cooling is executed.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a cooling device for a display heated by a light emitter.

0002

[Prior art] Figures 3 and 4 are, for example,
991 is a diagram showing a conventional display cooling device shown in Publication No. 991. In the figure, 1 is a box body, 2 is a display disposed in this box body, and 3 is a cooling device for this display device 2. A cooling fan, 4 is an inlet of a ventilation passage provided in the box body 1, 5 is an outlet of the ventilation passage, 6 is a display panel, and 7 is this display panel 6.
A diffuser transmitting plate 8 is provided on the back side of the display panel 6 to diffuse and transmit light to the display panel 6, and 8 is a case (not shown) having a portion for supporting the display 2 on the box body 1. 9 is this case 8
A light emitting body that serves as a light source for the display panel 6 supported by the display panel 6, for example, a fluorescent lamp or the like is used.

Next, the operation will be explained. A conventional display cooling device is configured as described above, and the heat of the light emitting body 9 is
The air is discharged into the ventilation passage of the box body 1 by the cooling fan 3 provided in each display 2, and is discharged to the outside from the ventilation passage exit 5 by the outside air introduced from the ventilation passage entrance 4.

0004

[Problems to be Solved by the Invention] Conventional display cooling devices are constructed as described above, so when the light emitting body generates a large amount of heat, it is difficult to display the display with only outside air passing from the ventilation duct entrance to the ventilation duct exit. The device cannot be cooled sufficiently, and cooling air tends to stagnate, especially in the ventilation passages near the center of the box, reducing cooling efficiency, increasing the temperature of the display panel and drive circuit, and changing the characteristics of the display panel. However, there were problems such as the color tone, brightness, etc. being different from the original values, and the image on the screen being distorted.

[0005] This invention was made to solve the above-mentioned problems, and by disposing a forced fan in the ventilation passage near the center of the box, even if the heat generation is large, the cooling air can be prevented from stagnant. It is an object of the present invention to provide a display cooling device that can sufficiently cool the inside of the display as well as prevent it from occurring.

[0006]

[Means for Solving the Problems] A display cooling device according to the present invention has a forced fan disposed in contact with a ventilation passage near the center of a box.

[0007] Furthermore, a temperature sensor is disposed in the ventilation passage near the forced fan near the center of the box.

[0008]

[Operation] In the display device cooling device of the present invention, the air volume and air pressure are increased by the forced fan, and the display device is sufficiently cooled.

[0009] Furthermore, a temperature sensor in the ventilation passage near the center of the box body can detect the area with the highest temperature, and the forced fan can be started.

0010

[Example] Example 1. FIG. 1 is a cross-sectional view showing one embodiment of the present invention.
3, 5 to 9 are exactly the same as the above-mentioned conventional device. 1
0 is a forced fan attached to the box 1 near the center of the ventilation path at the center of the screen.

In the display cooling device configured as described above, the forced fan 10 installed in contact with the ventilation passage in the center of the box body 1 is operated when the temperature inside the display reaches a predetermined temperature or higher. In this case, by turning on the forced fan and starting it, both the air volume and air pressure are increased, and the air is blown out from the center to both ends as the exhaust ports 5, so that sufficient cooling is achieved.

Example 2. In the first embodiment described above, the forced fan 10 is turned on and started when the internal temperature of the display device reaches a predetermined temperature or higher, but in this embodiment, the box body 10 to which the forced fan is attached Since a temperature sensor was installed in the ventilation path of
There is no need to manually monitor the temperature inside the display unit, and when the temperature exceeds a predetermined temperature, the temperature sensor can issue an alarm, or the forced fan switch can be automatically turned on. good.

[0013]

[Effects of the Invention] As described above, according to the present invention, since the forced fan is provided in contact with the ventilation path near the center of the box, the temperature of the display unit does not rise above a predetermined temperature. However, the display device can be sufficiently cooled.

Furthermore, by installing a temperature sensor in the ventilation path near the forced fan, even if no one is near the display, it can notify the temperature rise with an alarm, etc., and automatically turn off the forced fan. It has the effect of flipping a switch.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment of the invention.

FIG. 3 is a sectional view of a display device showing a conventional display cooling device.

FIG. 4 is a sectional view showing a conventional display cooling device.

[Explanation of symbols]

1 Box body 2 Display unit 5 Ventilation duct exit 9. Luminous body 10 Forced fan 11 Temperature sensor

Claims (2)

[Claims] 1. A box provided with a ventilation passage, a display mounted on the box facing the ventilation passage of the box, and a light emitting body disposed within the display. A display cooling device comprising a forced fan installed in contact with a ventilation passage near the center of the box to reduce heat from the light emitting body. 2. The display cooling device according to claim 1, wherein a temperature sensor is attached to a ventilation path of the box near the forced fan.