JPH0120796Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a lighting fixture using an electroluminescent lamp (EL board) as a light emitting element.

[Background technology]

As shown in FIG. 5, the brightness of an EL plate (electroluminescent lamp) changes greatly depending on the temperature within the normal room temperature range of 5°C to 35°C. Moreover, the degree of the fluctuation becomes larger as the applied voltage becomes larger.

For the reasons mentioned above, lighting fixtures using EL plates as light emitting elements have conventionally had the problem that the brightness changes depending on the indoor temperature.

[Purpose of invention]

This idea was made in order to solve the above problems, and the object is to provide a lighting fixture that can maintain a constant brightness without changing the luminance of the EL board even if the ambient temperature changes. It is an object.

[Disclosure of invention]

The lighting equipment according to this invention uses an electroluminescent lamp (EL board) as a light emitting element,
The electroluminescent lamp is characterized by being in contact with a transformer for boosting the current flowing to the EL board, either directly or indirectly through a heat transfer material, so that the heat generated by the transformer can be transferred to the electroluminescent sent lamp. There is.

Below, based on the embodiment shown in the drawings,
This idea will be explained in detail.

FIG. 1 is an external view of one example of a lighting fixture according to this invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a front view of its internal elements. A light emitting window 3 is provided on the front surface of a box-shaped casing 2, and an EL board 5 is held behind the light emitting window 3. The EL plate 5 is attached to the front side of an iron plate 7 supported by a pair of upper and lower mounting plates 6, 6 integrally provided on the back cover 2a of the casing 2, in close contact with the iron plate 7. At the bottom of the iron plate 7,
A notch 10 is provided for applying wiring 9, 9 to the EL board 5. In addition, at the lower end of the iron plate 7,
A step-up transformer 11 is attached to increase the current flowing through the EL board 5 to a predetermined voltage. This lighting fixture 1 may be installed by attaching legs 13 to the back as shown in FIG. It may also be installed by hanging it.

This lighting fixture 1 is configured to increase the voltage of a power line to a predetermined voltage using a step-up transformer 11 and then energize the EL board 5 in order to increase the luminance of the EL board 5. The Joule heat generated during boosting is transferred from the step-up transformer 5 to the EL plate 5 via the iron plate 7, and due to this heat transfer, the EL plate 5 while energized is almost independent of the external temperature. ,
It is heated to a constant temperature. The temperature is 50°C, which stabilizes the temperature characteristics of the brightness of the EL board.
It is desirable to set it around ℃.

Next, FIG. 4 shows an embodiment different from the above embodiment. In this embodiment 1', the EL board 5 is supported at a predetermined position behind the light emitting window 3 by a pair of upper and lower mounting plates 6', 6' provided on the back cover 2a. A step-up transformer 11 is attached to the lower end of this EL board 5.
is provided in direct contact with the EL board 5. EL
The plate 5 is heated to about 50° C. by heat directly transmitted from the step-up transformer 11, as in the previous embodiment.

In these embodiments, the EL plate 5 is maintained at around 50° C. by directly or indirectly transmitting the Joule heat of the step-up transformer 11 to the EL plate 5.
As shown in Figure 5, the EL plate is most stable and exhibits the highest brightness in the temperature range of around 50°C.
Therefore, even if the external temperature changes, the brightness of the EL board 5 hardly changes.

[Effect of idea]

As is clear from the above explanation, the lighting equipment according to this invention maintains the EL board within a predetermined temperature range using the Joule heat of the step-up transformer, thereby providing stable high brightness regardless of the external temperature. is now available.

[Brief explanation of the drawing]

Fig. 1 is an external view of one embodiment of the lighting fixture according to this invention, Fig. 2 is a side sectional view thereof, Fig. 3 is a front view of its internal elements, and Fig. 4 is a side sectional view of a different embodiment. FIG. 5 and FIG. 5 are characteristic diagrams showing the relationship between the thermal temperature of the EL board and the luminance. 1, 1'...Lighting equipment, 2...Casing, 3
...Light-emitting window, 5...EL board, 7...Iron plate, 11...
...step-up transformer.

Claims (1)

[Scope of utility model registration request] In a lighting device equipped with an electroluminescent central lamp as a light emitting element and a step-up transformer, the electroluminescent central lamp is brought into contact with the transformer either directly or indirectly through a heat transfer material, and the heat generated by the transformer is transferred to the electroluminescent lamp. A lighting device characterized by being provided with a centrifugal lamp so that heat can be transferred thereto.