JPH01238073A - Light emitting device - Google Patents

Abstract

PURPOSE:To confirm operations of a light emitting device easily and accurately by mounting the light emitting device having luminescent substance on a wiring board. CONSTITUTION:When an electric appliance is supplied with power, several number of LED's 1 mounted on a printed wiring board P light ON and OFF according to the operating conditions of the electric appliance. To confirm the operating conditions of each printed wiring board P, a back plate 35 of a cage 31 is removed. At this time, the LED's 1 which are in OFF state emit afterglow. This is how a luminescent substance or luminous paint 6 coating the outer surface of the LED 1 emits light energy, which the adjacent LED 1 absorbed when it was in OFF state, as light gradually even after the supply of the light energy is stopped. Therefore, the location of the LED 1 which is in OFF state can be confirmed easily.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to light emitting elements such as LEDs, and in particular to light emitting elements arranged for checking the operating status on wiring boards of various electronic devices. Regarding.

(Prior Art) Conventionally, many of various electronic devices have been constructed using a printed wiring board P on which an IC, a resistor, or a light emitting element for checking the operating state, such as an LED I1, is mounted.

Further, as shown in FIG. 3, this printed wiring board P is often used by being housed upright in a housing 31 of the electrical equipment.

(Problem to be Solved by the Invention) Therefore, when checking the operating state of the printed wiring board P while operating the electronic R-adjustment, it is necessary to
3 or look into the inside of the housing 31 through the ventilation hole 35 provided in the housing 31. However, the inside of the casing 31 is dark, and the printed wiring board P installed vertically
It was not easy to check the lighting status of the plurality of LEDs 1 disposed along with other parts on the top.

The present invention has been made in view of the above, and an object of the present invention is to provide a light emitting element that allows the operating state of a printed wiring board P to be confirmed even in a dark place.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the light-emitting element of the present invention is configured such that a holder holding a light-emitting part contains a luminescent substance.

(Function) In the light-emitting element of the present invention, since the holder contains a luminescent substance, the position of the light-emitting element can be easily confirmed in a dark place even when the light-emitting element is not lit. Can be done.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows an LED (light emitting diode), which is a light emitting element.
It is an external view showing an example of.

This LED 1 includes a cylindrical shaft part 2 that holds a light emitting part (not shown) inside, a hemispherical lens part 3 fixed to the upper end of this shaft part 2, and an anode terminal 4 that supplies current to the light emitting part. and a cathode terminal 5.

The shaft portion 2 is made of white resin molded into a cylindrical shape, and the outer surface of the cylinder is coated with phosphorescent material among luminescent materials,
A so-called luminous paint 6 is applied over the entire circumference.

The lens section 3 is formed by forming a transparent resin into a hemispherical lens, and condenses the light emitted from the light emitting section inside the shaft section 2 into a predetermined luminous flux and emits it.

Next, a case will be described in which the LEDI of this embodiment is mounted on a printed wiring board P, and a plurality of printed wiring boards P are attached to the casing 31 of an electrical device and operated.

These printed wiring boards P are usually attached to a plurality of connectors arranged in advance in the housing 31, and are electrically connected to other printed wiring boards P etc. via flat cables and printed wiring boards connected to these connectors. Connected.

When the electrical equipment is powered on, a plurality of LEDs mounted on the printed wiring board P blink according to the operating state of the printed wiring board, that is, the electrical equipment.

In order to check the operating status of each printed wiring board P, the back plate 35 of the housing 31 is removed.

At this time, the LEDl in the off state emits afterglow. In other words, the luminous paint applied around the LEDI,
The light energy absorbed when the corresponding or adjacent LEDI is in the lighting state is gradually emitted as light even after the light energy is no longer supplied.

Therefore, the position of the LED 1 in the off state can be easily confirmed. For example, there are multiple LEs on a printed wiring board P.
L that is off when Dl is mounted in a row
For example, it is possible to quickly confirm what number EDl is from the right side.

In this embodiment, the shaft portion 2 is coated with a luminescent paint, but the resin forming the shaft portion 2 may contain a luminescent substance.

Furthermore, depending on the shape of the LED 1, it is not limited to the shaft portion 2. For example, if it is integrally molded as shown in FIGS. 2(A) and (B), the corresponding portion of the shaft portion 2 may be (
In the case of a surface-emitting LED, as shown in FIG. 2(C), It may be applied to the side surfaces (shown with diagonal lines in the figure).

Furthermore, in the case of a polygonal prism such as a triangular prism, the entire or part of the side surface is coated, and in the case of a hemispherical body where most of the light diverges, the lower part or bottom of the hemispherical body is coated. . In this way, the portions to which the luminous paint is applied or contained can be arbitrarily determined without departing from the purpose.

[Effects of the Invention] As explained above, according to the present invention, by mounting a light emitting element having a luminescent substance on, for example, a wiring board, it is possible to confirm the position of the light emitting element even in a dark place such as a housing. Therefore, it is possible to easily and reliably check the operation of the wiring board when it is mounted on the housing.

[Brief explanation of the drawing]

FIG. 1 is an external view of a light emitting device according to the present invention, FIG. 2 is an external view of a light emitting device having another appearance, and FIG. 3 is a casing on which a printed wiring board is mounted with a light emitting device according to the present invention. FIG. 1... Light emitting element 6... Luminous paint

Claims (1)

[Scope of Claim] A light-emitting element comprising a light-emitting part and a holder that holds the light-emitting part, wherein the holder contains a luminescent substance.