RU2266466C1 - Light-masking headlight on light diodes - Google Patents

Abstract

FIELD: engineering of light-masking headlights on light diodes for use on vehicles.

SUBSTANCE: headlight has main and additional optical modules on light diodes, generating white, yellow or near infrared emission with narrow and broad beam of emission respectively, and also light-masking headpiece with blend, in conjunction with one or more lines parallel to each other on light diodes of blue, blue-light blue or blue-green emission color with optical axes, directed at an angle within limits 2-5° below horizontal plane. Lines and modules are connected to electronic transformers or directly to power grid with possible autonomous remote engagement and functioning. Lines are made in form of elongated polygonal circuit boards with light diodes. Light diodes of main module are covered by Fresnel lens, in focus of each cell of which additional shining light diode body is set.

EFFECT: higher efficiency of light masking, better lighting parameters, enhancement of functional capabilities.

4 cl, 4 dwg

Description

The present invention relates to lighting, in particular to light devices, such as multi-purpose masking lights on LEDs mounted on vehicles. Such headlights generate visible, yellow or infrared (IR) radiation of short and long range, i.e. with a wide, narrow and combined beam of radiation, as well as camouflage blue, blue-blue or blue-green radiation with a narrow beam (5-6 °) in the vertical plane and a wide beam of radiation (25-30 °) in the horizontal plane.

Known headlight [1] for multi-color lighting, comprising a housing with a light source collected in it in the form of an incandescent lamp, color filters and an electromechanical device that changes the position of the filters.

The disadvantages of the analogue are due to low efficiency, design complexity and the insecurity of blackout.

Known headlight [2] with a blackout nozzle, containing a housing with a parabolloid reflector assembled in it, in the focus of which an incandescent lamp is installed, and a diffuser that covers the outlet of the headlight. A reclining camouflage nozzle with a lid and a hood with extended horizontal slots for the exit of camouflage radiation blocked by a blue filter is installed on the indicated hole.

The disadvantages of the analogue are associated with the low efficiency of the incandescent lamp, large losses of radiation on the filter and on the headlamp cover, the inability to remotely control the masking conditions, because manual tilting of the cover is required to switch the camouflage radiation to the main radiation of the headlamp.

A known light device based on LEDs [3], comprising an optical module assembled in a housing based on LEDs with parallel optical axes with a power supply converter and current supply means, is covered by a flat Fresnel mesh lens. The luminous body of the LED is installed at the focus of each lens cell.

The disadvantages of the prototype are due to the lack of means to provide a camouflage beam in another region of the radiation spectrum (blue, blue-green, etc.) in comparison with the radiation of the main module (white or infrared radiation). The opposed device also does not provide the ability to remotely control the beam width and radiation color.

The aim of the invention is to provide effective light masking, improving lighting parameters and expanding the functionality of the headlights.

This goal is achieved by the fact that in the light-masking headlamp on the LEDs containing the main optical module on the LEDs of white, yellow or near infrared radiation with optical axes facing the outlet of the headlamp, a power supply converter assembled in the housing and a light-masking nozzle mounted on the housing with a hood and at least one horizontal slit for radiation exit, in the above headlamp housing one, two or more modules are installed on LEDs with a wider beam radiation, as well as one, two or more parallel lines coupled to the hood on blue, blue-blue or blue-green LEDs with optical axes oriented at an angle within 2 ÷ 5 ° below the horizontal plane, with rulers and modules LEDs are connected to the converters or directly to the mains with the possibility of autonomous remote inclusion and operation.

The goal is also achieved by the fact that the lines on the LEDs are made in the form of long polygonal electrical insulating boards, for example printed circuit boards, assembled in the upper part of the housing in parallel with each other and with LEDs mounted and soldered on the sides of the polygon with optical axes facing the outlet opening, perpendicular to the specified sides.

The task is also achieved by the fact that at least part of the LEDs of the main module on LEDs with parallel optical axes on the side of the headlight outlet is covered by a Fresnel mesh lens with a direct carrier layer, in the focus of each cell of which there is a luminous LED body.

The goal is achieved by the fact that the body of the blackout headlight in cross section has a rectangular or round or oval shape, and the blackout head at least partially follows the shape of the specified section.

The most preferred embodiment of the device according to the invention is shown in the drawings.

Figure 1. LED headlamp for vehicles. Sectional side view.

Figure 2. The same front view, without a blackout nozzle and protective glass.

Figure 3. The same as in figure 2, section A - A.

Figure 4. Block diagram of the connection of modules and rulers on LEDs to the headlight operating mode control unit.

Presented in figure 1 ÷ 3, the light-camouflage headlamp on the LEDs for vehicles is made in the housing 1 with a protective glass 2 covering the outlet of the headlamp mounted and sealed with a seal 3 in the mandrel 4.

The main optical module 5 is assembled in the housing 1 on LEDs 6 of white, yellow, or near-infrared radiation with a double scattering angle of 2θ _0.5 ≈25-30 °. It is advisable to use relatively powerful LEDs (≈1.5 ÷ 2 W), which require the use of an individual heat sink, so they are mounted on a massive glass-radiator 7 in thermal contact with the walls of the headlamp housing. The current-carrying leads of 8 LEDs, isolated by cambrics, are soldered on a printed circuit board 9. The LEDs 6 of the main module are shunted by zener diodes 10. Here, in the beaker-radiator 7 on board 9, an electronic converter 11 of the mains supplying the headlight from an on-board source or voltage generator 12 is assembled 28 or 48 V and current up to 1.2 A for vehicles.

The LEDs 6 of the main module 5 are assembled at the bottom of the cup-radiator 7 with parallel optical axes in the nodes of the rectangular coordinate grid in such a way that their luminous bodies O 'are located in the foci of square cells of a flat Fresnel mesh lens 13 with a direct carrier layer mounted on the uprights 12, which covers the radiation of each LED in an angle of 25-30 ° from the side of the outlet opening of the headlamp housing 1 blocked by protective glass 2. The optical axis of the O'-O 'LEDs coincides with the optical axis of the cells of the Fresnel lens 13.

In the headlamp housing 1, additional optical modules 14 and 15 are also installed (see Figs. 1 and 2), assembled on similar LEDs 6, providing wider radiation beams without a Fresnel lens. These LEDs 6, as well as in the main module, are mounted on radiators 16 and 17, which are in thermal contact with the walls of the housing 1. The current-carrying terminals 18 of the LEDs 6 of the additional modules are soldered to the printed circuit boards 19, shunted by zener diodes (not shown) and connected to power supply converter.

A light masking nozzle 20 with a hood 21 is installed on the upper part of the headlamp housing 1, in which at least one horizontal slit 23 for radiation exit is made with a curved partition 22.

Inside the upper part of the headlamp housing 1, one, two or more parallel lines 24 and 25 (see Figs. 1, 2, 3) are installed on LEDs 26 with a scattering angle of 2θ _0.5 ≈5-6 ° blue, blue blue or blue-green color radiation. The optical axes O ₁ -O ₁ and O ₂ -O _{2 of the} LEDs 26 are separated by a partition 22 and directed respectively to the slit 23 and to the hole 27 of the lower part of the hood 21 at an angle in the vertical plane within α _B = 2 ÷ 5 ° relative to and below horizontal a plane parallel to the optical axis of the OO headlamp, the nozzles associated with it, and also the optical axes of the main 5 and additional 14 and 15 modules. This is achieved by turning the bars 24 and 25 with the LEDs 26 to the specified angle by performing them in the form (see Fig. 3) of long polygonal electrical insulation, for example printed circuit boards, assembled through beveled spacers 28 on the brackets 29 in the upper part of the housing 1 parallel to each other . The LEDs 26 have a double scattering angle of 2θ _0.5 = 5-6 °, are installed on the bottom and are wired on the sides of the headlights and lens hood 21 (see Fig. 1) the sides of the polygons (polygonal rulers-boards) 24 and 25 with optical axes O ₁ -O ₁ and O ₂ -O ₂ perpendicular to the indicated sides. Five LEDs 26 are assembled on the side of the central part of the polygonal line-board 24, the optical axis of which is perpendicular to it and parallel to the optical axis of the OO headlights (see Fig. 3).

At the same time, three LEDs 26, located on the sides of the polygon at opposite ends of the line-board 24, have the orientation of the optical axes O ₁ ', O ₂ ' and O ₃ '(see figure 3), deployed relative to the optical axis OO of the headlight respectively 2, 5 °, 5 ° and 7.5 °.

Similarly, the optical axes O ₄ ′ and O ₅ ′ of two pairs of LEDs 26 at the ends of the lower ruler board 25 are rotated 10 ° and 12.5 °, respectively (see FIG. 3).

Due to the exact rotation of the optical axes of LEDs with a narrow angle of radiation scattering on polygonal line boards 24 and 25, the radiation beam formed by the lines is expanded in the horizontal plane from 5-6 ° to 25-30 °, providing the possibility of blackout lighting in the vertical plane at angles 5 -6 ° and in the horizontal plane at angles of 25-30 °.

The cross-section of the housing 1 of the blackout headlamp is close to rectangular, round or oval, and the blackout 20, covering the upper part of the body, at least partially repeats the shape of the specified section.

The main optical module 5, additional modules on the LEDs 14 and 15, as well as the lines 24 and 25 on the LEDs are connected to the corresponding converters 11 and 30 of the power supply 31 (see Figs. 1 and 4) or directly to the power supply 31 through current-limiting resistors as well as through the switch 32 to the control panel 33 installed at the driver of the vehicle, providing autonomous remote inclusion, control of the type of radiation of the headlight (full or camouflage lighting mode) and operation.

The work of the vehicle headlamp is as follows.

When turned on from the control panel 33 through the switch 32 of the main optical module 5 (see Fig. 4), the headlight generates, depending on the LEDs installed in the module, white, yellow or infrared radiation in a narrow round-symmetric beam with a scattering angle α ^У _0.1 ≅ 6 -8 °. The inclusion of additional modules 14 and 15 together with module 5 ensures the formation of a combined radiation beam with a scattering angle α ^{K of} _0.1 0,130 °.

The inclusion of only additional modules 14 and 15 forms a wide beam of radiation α ^Ш _0,1≅ 30 °.

When the modules 5 and 14, 15 are turned off, camouflage lighting of the LED lines 24 and 25 is activated, forming a light beam with a scattering angle in the vertical plane α ^B _0.1 ≅ 5-6 ° and in the horizontal plane α ^G _0.1 ≅ 30 °. In this case, the maximum radiation of the beams O ₁ O ₁ and O ₂ O _{2 is} inclined relative to and below the horizontal plane by an angle α _B ≅ 2-5 °.

Along with the obvious expansion of the headlight's functionality, high blackout efficiency is ensured through the use of LEDs with a narrow beam of radiation in the vertical plane in combination with the features of the lens hood that covers the "tail" of the LED radiation at predetermined angles.

In all operating modes, the lighting characteristics of the headlight are significantly improved compared to headlights on incandescent lamps due to the selective emission of LEDs, which exclude the use of light filters, and higher light output.

LITERATURE

1. The application of Germany No. 3837732 A1, class. F 21 P 5/02, F 21 V 9/08. Publ. 05/10/90 g.

2. Headlight of visible light with blackout FG127. TU 37.003.749-76.

3. Pat. RF №2202731, class F 21 V 5/00, publ. 04/20/2004 Bull. No. 11.

Claims (4)

1. A dimming LED headlamp containing the main optical module on white, yellow or near infrared LEDs with optical axes facing the headlamp outlet, a power supply converter assembled in the housing, and a blackout nozzle mounted on it with a hood and at least at least one horizontal slit for radiation output, characterized in that one, two or more modules are installed in the headlamp housing on LEDs with a wider beam of radiation, as well as paired with one, two or more parallel lines on blue, blue-blue or blue-green light emitting diodes with optical axes oriented at an angle within 2 ÷ 5 ° below the horizontal plane, and the rulers and LED modules are connected to the corresponding converters or directly to the mains with the possibility of autonomous remote inclusion and operation. 2. The blackout LED headlamp according to claim 1, characterized in that the LED line is made in the form of long polygonal electrical insulating boards, for example printed circuit boards, assembled in the upper part of the housing in parallel with each other and with LEDs mounted and soldered on facing the outlet lights and hoods on the sides of the polygon with optical axes perpendicular to the specified sides. 3. The masking headlamp on the LEDs according to claim 1, characterized in that at least part of the LEDs of the main module on LEDs with parallel optical axes from the side of the headlight outlet is covered by a Fresnel mesh lens with a direct carrier layer, in the focus of each cell of which there is a luminous body LED. 4. The light-masking headlamp on the LEDs according to claim 1, characterized in that its body in cross section has a rectangular, round or oval shape, and the light-masking nozzle at least partially repeats the shape of the specified section.

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