JPS6373679A - Light emitting diode - Google Patents

Abstract

PURPOSE:To be able to alter a coloring in response to a polarity merely by a pair of electrodes by eliminating an increase in the area of a display section by providing a pair of light emitting diode elements connected in parallel to become a reverse polarity between a pair of electrodes, and a light scattering diode cap for securing a pair of electrodes to seal a pair of light emitting diodes. CONSTITUTION:The anode of a first light emitting diode element 11 is connected to one electrode 21, and the cathode is connected to other electrode 22. The anode of a second light emitting diode element 12 is connected to the electrode 22, and the cathode is connected to the electrode 21. The first and second diodes 11, 12 are sealed in a light scattering diode cap 3. In order to operate it, a voltage is applied between the electrodes 21 and 22. When a positive voltage is applied to the electrode 22 with respect to the electrode 21, the second diode 12 generates a color, and when a negative voltage is, on the contrary, applied, the first diode 11 generates a color.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical semiconductor device, and particularly to a light emitting diode that converts an electrical signal into an optical signal and utilizes a wavelength range of visible light.

[Conventional technology]

Such light emitting diodes have traditionally been realized using PN junctions, and the widely used 0 emission colors are made to match the wavelengths of red, green, amber, etc., and are individually assembled for each different emission color. . FIG. 3 shows an electric circuit diagram of a conventional light emitting diode, and FIG. 4 shows its structure.9Although there are differences in the emitted light colors, the structures are basically the same.

In Fig. 3, 1 is a light emitting diode element, 21.22
3 is an electrode, and 3 is a light-scattering diode cap. The anode side of the light-emitting diode element 1 is connected to one electrode 21, and the cathode side is connected to an electrode 22. By passing a current of a predetermined value or more through this light emitting diode element 1, it emits light, and the light is scattered by the light scattering diode cap 3, causing the entire light scattering diode cap 3 to develop a color.

[Problem that the invention seeks to solve]

Conventional light emitting diodes are intended to emit light in a single color. Therefore, as an application example, it is often used as a system to notify whether the power is on or not.In contrast, in order to distinguish multiple states by color, diodes with different light emitting colors are prepared and their A system is adopted in which notification is provided based on a combination of energized states. At this time, since a plurality of diodes are lined up, for example, the display area increases when displayed on the front, or another means is required to make it clear that the plurality of diodes are grouped together. Furthermore, the direction of current flowing through each diode is constant, and applications can only be used where the polarity of the voltage applied to the electrode is constant.

[Means for solving problems]

The light emitting diode of the present invention includes a pair of electrodes, a pair of light emitting diode elements connected in parallel between the pair of electrodes so as to have opposite polarities, and the pair of electrodes being fixed. It is characterized by comprising a light scattering diode cap that seals the paired light emitting diode elements.

〔Example〕

Next, the present invention will be explained using the drawings.

FIG. 1 is a circuit diagram of an embodiment of a light emitting diode according to the present invention, and FIG. 2 shows its structure.

In FIG. 2, 11 is a first light emitting diode element;
2 is a second light emitting diode element, 21 and 22 are electrodes,
3 is a light scattering diode cap. The first light emitting diode element 11 and the second light emitting diode element 12 are connected to a pair of electrodes 21 and 22 so that their polarities are opposite to each other.

For example, the anode of the first light emitting diode element 11 is connected to one electrode 21, and the cathode is connected to the other electrode 22. Conversely, the anode of the second light emitting diode element 21 is connected to the electrode 22, and the cathode is connected to the electrode 21. These first and second light emitting diode elements 11 and 12 are enclosed in a common light scattering diode cap 3.

To operate this, a voltage is applied between electrodes 21,22. When a positive voltage is applied to the electrode 22 with respect to the electrode 21, the second light emitting diode element 12 develops color, and conversely, when a negative voltage is applied, the first light emitting diode element 11 develops color. In addition, if the voltage is within the range of a predetermined current or less, they will not develop color.Since the light-scattering diode cap 3 is common to the first and second light-emitting diode elements 11 and 12, the light-scattering diode cap 3 3 will produce a color determined by the first and second light emitting diode elements depending on the direction in which the voltage is applied to the electrode.

The first and second light emitting diode elements can be selected arbitrarily from conventionally known colors such as red, green, and amber, and it goes without saying that various colors can be easily selected depending on the system to be applied. .

For example, in the case of a combination of green, which gives safety as a psychological effect, and red, which gives danger, the color of this diode will be green when the device is in normal operating condition, and the same diode will be red in abnormal operating condition. It can be used for.

〔Effect of the invention〕

As explained above, the present invention first achieves state perception by emitting multiple colors by sealing two types of light-emitting diode elements emitting different colors in the same light-scattering diode cap and reversing their polar connections. On the other hand, it has the effect of producing a psychological effect that can be understood just by looking at the display section at a single location, and eliminating the increase in area of the display section when a plurality of light emitting diodes are lined up at the same time. Secondly, for applications where color development is changed depending on polarity, this can be achieved with just one pair of electrodes.

[Brief explanation of the drawing]

FIGS. 1 and 2 are circuit diagrams of an embodiment of the present invention. The configuration diagram, FIG. 3, is a configuration diagram of a conventional example. 1.11.12... Light emitting diode element, 21°22
...electrode, 3...light scattering diode cap. Agent: Patent Attorney Rini Uchihara (1. Leopard 2. Kudzu 3.

Claims (1)

[Claims] a pair of electrodes; a pair of light emitting diode elements connected in parallel between the pair of electrodes so as to have opposite polarities;
A light-emitting diode, comprising: a light-scattering diode cap that fixes the pair of electrodes and seals the pair of light-emitting diode elements.