RU34693U1 - Lighting device - Google Patents

Description

IPC 7 F21S 8/00, 8/10, F21V 5 / 00.7 / 00, G08G 1/095, B61L 5 / 00.5 / 18

Lighting device

The inventive utility model relates to the technique of light signaling, namely to traffic lights and can find application in automobile and railway transport as signal and indicating lights.

Known devices 1, 2, containing a housing, placed in it a light source based on LEDs, and a lens raster. For a lens raster, the first surface along the optical beam contains capacitor lens sections, and the second is scattering. The number of capacitor lens sections is equal to the number of LEDs located on their optical axes in focal planes. A disadvantage of the known devices is that since the lenses do not have a large angular aperture, therefore, they collect LED radiation in a narrow beam into a parallel beam. Consequently, the axial intensity of the light at their exit is small. To ensure the required light intensity, a large number of LEDs are needed. For the use of LEDs emitting in wide angle the use of lenses is impractical.

Known LED device 3, containing crystals of the light emitter placed in the reflector, a concentrating lens. The reflector consists of a set of individual reflectors made in the recess of the substrate. The lateral surface of each individual reflector is made reflective in the form of a body of revolution, mainly in the form of a conical surface. The number of individual reflectors is equal to the number of crystals of the emitter. The concentrating lens is made in the form of a ruled conical raster. Moreover, all the crystals of the light emitters are located on one straight line parallel to the direction of the line conical raster structure. The disadvantage of this device can be attributed to the fact that the reflector, consisting of a set of individual cone-shaped reflectors, does not ensure the formation of a parallel beam of radiation at the output. In addition, the concentrating lens, made in the form of a linear conical raster, does not allow the use of LEDs with a wide angle of radiation.

Closest to the claimed utility model in terms of essential features is a lighting device 4, comprising a casing with a reflective housing placed therein, a transparent cover. The reflective body is made in the form of parabolic holes for receiving light sources, such as LEDs. The LEDs are mounted on a base plate that is inserted into

one can attribute the fact that, firstly, the reflective body forms at the exit of the parabolic holes a not quite parallel beam of light, since part of the light emitting from the LEDs comes out in the form of a diverging beam. This reduces the efficiency of signaling devices, for example, in railway transport it is important that the signal is recognized from a long range. Secondly, the radiating surface of the device appears to be uneven and consists of separate radiating sections of a circular shape - the shape of the base of the paraboloid holes of the reflective body. This makes it difficult to correctly perceive the traffic situation at distances close to the signal device.

The problem to which the claimed utility model is directed is to increase the efficiency of the lighting device by optimizing its optical system.

The solution to this problem is achieved in that the lighting device comprises a housing, with a light source based on LEDs and a reflector placed in it, a transparent cover. The reflector is made in the form of a combination of individual reflectors with parabolic side surfaces. At the same time, the number of individual reflectors is equal to the number of LEDs, and each LED is mounted on the optical axis and in focus of the individual reflector.

Unlike the prototype, inside each individual reflector there is a lens coaxial with a bunch of LED-individual

individual reflector. The bases of the individual reflectors are made in the form of hexagons. The reflector is made of polymeric material. The lateral parabolic surfaces of the individual reflectors are internally coated with a high reflection coefficient material.

The use of the above combination of essential features in the lighting device will allow

1. To increase the range of visibility due to the conversion of diverging beams at the output of individual paraboloids into parallel, which will lead to an increase in the luminous intensity of radiation.

2. To increase the convenience of perception of the light signal at close distances by creating a lighting device with a uniformly radiating surface.

The essence of the claimed utility model is illustrated by drawings. In FIG. 1 shows a general arrangement of a lighting device. Figure 2 - the course of the rays in the lighting device. In FIG. 3 - reflector.

Figure 4 is a view of Anafig.Z.

The lighting device includes a housing 1, a board with LEDs 2, a reflector 3, consisting of individual reflectors 4, lenses 5, and a transparent cover 6. A board with LEDs 2 and a reflector 3 are placed inside the housing 1. (Fig. 1) Lenses 5 are located on optical axes

parabolic lateral surfaces 7 (Fig. 1, 2, 3). The base 8 of all individual reflectors 4 are made in the form of hexagons (Fig. 4).

Let us explain the operation of the lighting device. The lateral part 9 of the radiation of the LEDs 2 installed in the foci 10 of the corresponding individual parabolic reflectors 4 is collimated, as in the prototype, in the direction of the optical device. The Central part 11 of the radiation of the LEDs 2 is additionally collected by lenses 5 and is directed along the optical axis of the radiation. In the prototype, this part of the radiation leaves the individual paraboloid in directions at an angle to the optical axis (Fig. 2). The implementation of the bases 8 of individual reflectors 4 in the form of hexagons allows you to place them on the entire surface without gaps, which ensures uniform filling of the entire light aperture of the device with radiation (Fig. 4).

Thus, during the operation of the inventive lighting device, a parallel beam is formed and an increased axial luminous intensity is provided. The application of individual reflective coatings with a high reflectance to the inner side parabolic surface will additionally increase the luminous intensity, and, consequently, the range of radiation visibility. At the same time, the lighting device has a uniformly filled radiating surface.

zp East 1. 2. 3. 4. KI of fame: Russia, patent No. 213978, IPC 6 F21Q 1/00, F21M 9/00, G08G 1/00, published on 09/20/1999. Russia, invention, patent No. 2189523, IPC 7F21V 5/00, G08G 1/095, published on 2.09.2002. Russia, invention, patent No. 2187175, IPC 7 H01L 33/00, published on 08/10/2002. EP, invention, application JVb 1030099 A2, IPC 6 F21 S 8/00, published on 23.08.2000.

Claims (3)

1. A lighting device comprising a housing with a light source based on LEDs and a reflector, a transparent cover, a reflector made in the form of a set of individual reflectors with parabolic side surfaces, the number of individual reflectors being equal to the number of LEDs, and each LED is mounted on the optical axis and in the focus of the individual reflector, characterized in that inside each individual reflector there is a lens coaxial with a bunch of LEDs - individual reflection Tel and with a focus coinciding with the focus of the respective individual reflector base the individual reflectors are in the form of hexagons. 2. The lighting device according to claim 1, characterized in that the reflector is made of a polymeric material. 3. The lighting device according to claim 1, characterized in that the parabolic lateral surfaces of the individual reflectors are coated with a high reflection coefficient material from the inside.