JPH04263288A - Display device - Google Patents

Abstract

PURPOSE:To secure the safety of the device by fitting a temperature sensor to a box body and warning that the temperature in the box body rises to specific temperature. CONSTITUTION:Four example, four temperature sensors 7 in this case are fitted to the box body 1 at specific positions nearby a light emission unit group 2. When the temperature in the box body 1 reaches the specific temperature, the temperature sensors 7 detect that and an alarm is generated. Therefore, an operator even when away from the display device can know the temperature rise.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device installed outdoors, and particularly to a cooling structure thereof.

0002

[Prior Art] FIG. 3 shows, for example,
FIG. 9 is a cross-sectional side view showing a conventional display device disclosed in Publication No. 9; In the figure, 1 is a box body, 2 is a group of light emitting display units attached to the front surface of this box body 1, 3 is an outside air inlet provided on the rear face of the box body 1, and 4 is a box of this outside air inlet port 3. An intake fan is provided inside the body 1, 5 is a filter attached to the inlet of the outside air inlet, and 6 is a cover that covers the filter 5 and has an open lower half.

A conventional display device is constructed as described above,
For example, when cooling the light emitting display unit group 2 within the box body 1, by rotating the intake fan 4, the outside air inlet 3
The outside air is introduced through the filter 5 for cooling, thereby protecting the light emitting unit group 2 from burning out.

0004

[Problem to be Solved by the Invention] In the conventional display device as described above, the heat generated from the light emitting unit group is cooled only by introducing outside air from the intake fan. When the temperature inside the box increases, cooling cannot keep up with the temperature increase, resulting in problems such as failure or burnout of the light emitting unit group.

[0005] This invention was made to solve this problem, and even if the temperature inside the box increases to a certain extent, it can be lowered and the temperature of the box can be kept at a predetermined temperature. The aim is to obtain a display device that can detect this when it reaches the target.

[0006]

In a display device according to the present invention, a temperature sensor is attached to a box near a group of display units.

Furthermore, a forced fan is attached to a predetermined position on the rear side of the box.

[0008]

[Operation] When the temperature of the box of the display device constructed as described above rises to a predetermined temperature, the temperature sensor attached to the box is activated to issue an alarm or the like to notify a person.

Furthermore, when the temperature sensor detects a predetermined temperature, the forced fan is operated to lower the temperature of the box.

0010

[Example] Example 1. FIG. 1 is a cross-sectional side view showing one embodiment of the present invention.
6 to 6 are completely the same as the above-mentioned conventional device. Reference numeral 7 denotes temperature sensors attached at predetermined positions on the box 1 near the light emitting unit group, and in this case, four temperature sensors are attached.

In the display device configured as described above, when the temperature of the box 1 reaches a predetermined temperature, the temperature sensor 7
will catch this and issue an alarm. Therefore, the operator can notice even if he is far away.

Example 2. In the first embodiment described above, by attaching the temperature sensor 7 to a predetermined position of the box 1, it is possible to detect that the temperature of the box 1 has risen to a predetermined temperature. By installing the forced fan 8 at a predetermined position on the rear surface of the box 1, when the temperature of the box 1 rises to a predetermined temperature, the forced fan 8 is started to reduce the air volume and pressure inside the box 1. Increase and lower the temperature inside the box.

[0013]

[Effects of the Invention] Since the present invention is constructed as described above, it produces the following effects. By attaching a temperature sensor to the box, it is possible to know when the temperature of the box has risen to a predetermined temperature, and to protect the safety of the device by stopping the device.

Furthermore, by installing a forced fan at a predetermined position on the rear surface of the box, even if the temperature of the box rises to a predetermined temperature, the temperature inside the box can be lowered to some extent.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view showing Embodiment 1 of the present invention.

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

FIG. 3 is a cross-sectional side view showing a conventional display device.

[Explanation of symbols]

1 Box body 2. Light emitting display unit group 3. Outside air inlet 5 Filter 7 Temperature sensor 8. Forced fan

Claims (2)

[Claims] Claim 1: A box body with a group of light-emitting display units attached to its front surface, an outside air inlet provided on the rear surface of the box, a filter attached to the outside air inlet, and a box body with a group of light-emitting display units attached thereto; A display device characterized in that a temperature sensor is provided at a predetermined position of the box body in the vicinity. 2. The display device according to claim 1, further comprising a forced fan installed at a predetermined position on the rear surface of the box.