Light assembly and lantern for lighting of road and/or street

FIELD: electricity.

SUBSTANCE: invention relates to lighting engineering. The light assembly (10) used for a lantern (1), in particular, for lighting of roads and/or streets has adjusted light distribution. The light assembly (10) contains at least two light (11, 12) sources or two groups of the light sources, at that each of the above light sources (11, 12) or each of the above groups has individual light distribution performance, at that aggregated light distribution for the light assembly (10) is adjusted by change in light output ratio for at least two above light sources (11, 12) or groups of light sources.

EFFECT: simplifying adjustment of light distribution.

10 cl, 9 dwg

 

This invention relates to a lighting unit and the lamp used for illumination of streets and/or roads.

In particular, this invention is directed to creating a lighting unit, providing the ability to customize the light distribution in the longitudinal direction of the road.

As usually happens with lanterns for lighting of streets and/or roads in urban areas known for street lighting lanterns are installed on a pole or on the front surface of the wall, the plane of symmetry of the lamp is directed perpendicular to the longitudinal direction of the illuminated streets or roads. Then the light should cast light generated in the direction from the plane of symmetry so as to evenly illuminate the part of the streets and roads to the left and to the right of the lantern. In addition, part of light is emitted along the plane of symmetry, in order to cover the whole width of the street or road in front of the lantern.

When designing a lamp for street lighting has to meet different needs. First of all, the desired rapid and efficient installation of the lights. Next, we need a high utilization rate and high efficiency while maintaining the lowest possible values blindness. As with all lighting applications must be received appropriate level of visibility and minimized VK is hell in the glow of the sky.

From the prior art known different solutions for road lighting lanterns, which are usually divided into two main families.

Conventional road lighting lanterns, usually equipped with one lamp and the respective system of the reflector, and the reflector system designed to influence the light in such a way that it turns out the desired light distribution.

In addition, the known road lighting lanterns, which contain many light-emitting devices, in particular light emitting diodes (LEDs). In this case, the LEDs are arranged in a very specific structure, in which each LED emits light in a given direction. In both cases the lights are separated from each other at equal distances on one shoulder or both shoulders of the road.

The above-mentioned conventional lights in most cases contain sodium discharge lamp a high-pressure or metal halide discharge lamp, which emitted a burning light element is governed by the reflector to obtain the desired lighting of the streets. Known configuring the light distribution for different desired lighting schemes (i.e., a given distance between the lights or the predetermined width of the road) by changing the position of the lamp relative to the reflector. However, di is the scoring range, in which the light distribution can be configured is limited, and also the utilization of such conventional lights is limited to the value of 0.45 to 0.5. To get a significant change in the characteristic of light distribution of these lights, you would need to change the reflector or to use additional optical elements that affect the emitted light.

Regarding the second major collection, in which the lantern is based on a set of light-emitting devices, the different approaches. In accordance with the first solution, there are several light sources with different tilts and orientations to obtain a combined light distribution, suitable for lighting of roads. However, this approach tends to increase the complexity of the system, and it is difficult to obtain the limit osleplennost. In another approach, all the light sources are arranged on the same flat surface, and the floodlight lantern is inclined at a relatively large angle (about 20 to 30) to obtain an asymmetric lateral distribution of light that is required for lighting is also opposite the side of the road.

However, all the solutions known from the prior art have the disadvantage that it is very complex and difficult to configure features such as the specific light distribution of the lamp. A significant change in light distribution can be obtained only by changing the arrangement of the light sources or the use of multiple optical elements.

The invention, in particular, solves the problem of setting the light distribution in the longitudinal direction of the road or street. Distribution characteristic of the light of lights located on the side of the road, must be configured in such a way that it turns a uniform distribution of light along the entire length of the road. It is therefore necessary to ensure that the portion of the light is emitted in both directions from the lamp within the specified range. The characteristic of light distribution should take into account not only the height of street lighting lanterns, but the distance between two adjacent lamps, characteristics of the road (for example, width of the road) and lighting standards that must be met. During the design of street lighting choose special optical devices, which are later used in the Assembly of lamps, and these optical devices provide the desired light distribution. So in this case it is necessary to provide different combinations of reflectors and/or lenses to ensure that you can obtain uniform illumination of the road. Obviously, this solution is complex and requires the storage of many different pricheski components.

In addition, even after final installation of street lighting may be situations in which the desired configuration of the light distribution. For example, if weather conditions change or reflectivity of the road, it would be desirable to affect the distribution of light to get the best lighting. A normal system known from the above prior art, this configuration of the light distribution during operation of the system is practically impossible.

As explained above, in the prior art there are other solutions, according to which street lighting lantern contains a number of separate light sources, in particular LEDs, and the above LED is directed in specific directions to individually illuminate a small area around the lamp. The cumulative light distribution of the lamp can in this case be adjusted by selecting only some of the LEDs that are active. However, this solution requires a complex control system and shows a low efficiency, because actually used only a certain fraction of the available light sources.

Therefore, the objective of the invention is to provide a new solution that provides a fast and efficient configuration of the distribution with the ETA street lighting lantern.

This problem is solved by a lighting unit described in the independent claim 1 of the claims. Preferred embodiments of the present invention are objects of the dependent claims.

The proposed solution is based on the idea of developing a lighting unit having at least two light sources or two groups of light sources, each of the above-mentioned light sources, or each of these groups of light sources has an individual characteristic light distribution. Then the cumulative distribution of the light is adjusted by changing the ratio of sotoudeh light sources or groups of light sources so that the mixed light emitted by both light sources, or both groups of light sources, combined with the achievement of the desired distribution.

Accordingly, a lighting unit for use in a flashlight, in particular, the lantern for lighting of roads and/or streets, and referred to the lighting unit has adjustable light distribution. The lighting unit includes at least two light sources or two groups of light sources, each of the above-mentioned light sources, or each of these groups of light sources has an individual characteristic distribution of the population of light, moreover, the light distribution of the lighting unit is adjusted by changing the ratio of sotoudeh mentioned at least two light sources or two groups of light sources.

In accordance with an additional aspect of the present invention, a method for setting the light distribution of the lamp in a particular lamp used for lighting of roads and/or streets, and the lantern contains at least two light sources or two groups of light sources, each of the above-mentioned light sources, or each of these groups of light sources has an individual characteristic light distribution and cumulative distribution of light of a lantern set by changing the ratio of sotoudeh mentioned at least two light sources or groups of light sources.

A significant advantage of this invention lies in the fact that the proposed solution also allows you to adjust the light distribution during operation of the system. In case the weather changes and/or reflectivity of the road, the setting of this distribution can spend immediately. The configuration of the light distribution is preferably carried out automatically by the built-in lamp control unit, which either accepts external control signals, or is connected with a sensor that outputs information about the road and/or weather conditions.

This invention also enables the location of all light sources on a flat surface. Thus, the simplified geometry of the lamp and its manufacturability.

Preferably, the light sources are LEDs. In this case, each group of light sources includes many LEDs, and the ratio of sotoudeh groups of light sources can be changed by selecting the total number of activated LEDs in each group. More preferably, the ratio is changed sotoudeh and, therefore, light distribution, receive by changing the direct current applied to the LED, or another signal subjected to pulse width modulation (PWM) is used for the excitation LED. Each light source or each group of light sources can be equipped with(a) an optical element adapted for light distribution corresponding light source or the corresponding group of light sources in accordance with the individual light distribution. In particular, it may be sufficient to provide two light sources, the first is the distribution of light to illuminate the road or street under a street light, and the second is adapted for directing light on sections of the road or street, removed from the lantern. Then you can combine the light from these two sources the Council, receiving a desired light distribution.

Below is a more detailed explanation of this invention and the preferred variants of its implementation with reference to the accompanying drawings. In these drawings:

Fig. 1 and 2 schematically depict the task underlying the present invention;

Fig. 3 and 4 depict the species according to a variant implementation of the street lighting of the lamp in accordance with this invention;

Fig. 5A and 5b depict light distribution for two different light sources;

Fig. 6a-6c depict the effect of the correction ratio sotoudeh two light sources according to Fig. 5A and 5b.

Fig. 1 and 2 schematically depict a situation in which street lighting lamps 100 are arranged with a uniform interval on the side of the road. In this case, the lamps 100 are located at a distance of 30 m and therefore in the longitudinal direction of the road, i.e. in the plane of the C0-C180requires a specific distribution of light output, as shown on the right side of Fig. 1.

If now the distance between the two lights 100 is reduced, as shown in Fig. 2, we also have to adjust the distribution of light to form a more narrow light distribution, as shown in Fig. 2, again to ensure uniform illumination of the road over its entire length. If this was used in the background and with the distribution of light, it is shown in Fig. 1, the fluctuations of the light along the length of the road would have led to poor visibility obstacles for drivers traveling on this road.

Although this situation is not shown in the drawings, in the case of correction of the height of the lights during the lighting design would also require adjusting the light distribution. In addition, situations in which the desired configuration of the light distribution may also occur during operation of the street lighting system. In particular, if changes in weather conditions (rain, fog ...), a small adjustment of the light output could improve the lighting quality and to provide better light distribution on the road. The change in road conditions due to rain, snow or other events (e.g., aging or replacement of asphalt or upgrade of the road surface) may also require adjustment of the light output.

This invention now provides a very effective and elegant solution to solve the above problems. This decision is based on the idea of providing a lighting unit having two different sources of light with different light distribution characteristics, the intensity of the light sources is adjusted so that the obtained cumulative distribution of light, which corresponds to the desired distribution.

Fig. 3 and 4 display the fair variant implementation of street lighting lantern which contains the lighting unit, configured to configure a distribution, as explained above. As shown in Fig. 3 and 4, the lamp 1 contains floodlight 2, located at the top of the post 3. Alternatively, you could also install a floodlight 2 directly on a vertical wall. Spotlight 2 preferably takes place horizontally. However, you could also use an angled arrangement, in which the illuminator 2 is located at an acute angle from approximately 0 to 15 relative to horizontal.

In this embodiment, shown in the drawings, a projector includes round case 4 accommodating the lighting unit 10 according to the invention, which will be more discussed below. However, for floodlight 2 could be used and other forms. The lower opening of the housing 4 is closed by a transparent plate 5 to prevent the ingress of dust or moisture into the spotlight 2.

In Fig. 4 more shows floodlight 2 of the lamp 1, which includes the lighting unit 10 according to the invention. The lighting unit 10 in the illustrated embodiment, contains two sources 11 and 12 of light, with each source 11, 12 light contains many LED 13. Each light source further comprises a lens 14, 15, which controls the emission of light emitted from the respective group LED 13. Lenses 14, 15, first of all, ensure RA is the distribution of light with transverse asymmetry, preferably with the same transverse asymmetry, to ensure that the road in front of the lamp can be lighted with high intensity while lighting on both sides of the canopy with less intensity.

However, the lenses 14, 15 are also different longitudinal distribution, and the lens 14 of the first source 11 of the light adapted for directing light emitted from the respective LEDs 13, right under the lamp 1. Therefore, the first source 11 of the light is the light distribution to illuminate the road or street under a street light. On the other hand, the lens 15 of the second light source 12 is adapted to distribute light mainly sideways, i.e. in the longitudinal direction of the road, and therefore, the second light source 12 is a light distribution from another longitudinal distribution.

Although in this embodiment, each source 11, 12 light has a single lens 14, 15, covering all LED 13 of the corresponding source 11, 12 light, every single LED 13 can also have its own optical element. In this case, all the LED 13 with the optical element, providing a narrow longitudinal light distribution, form the first light source and the LED 13 with optical elements that provide a wide light distribution, represent the second light source. In addition, th is would be possible to provide light sources with different characteristics of light emission in the longitudinal direction, you could also use reflectors.

Fig. 5A and 5b depict an exemplary light distribution for two different light sources. From these drawings can be easily seen that in Fig. 5A presents the distribution for the light source, adapted to emit light to the side, and Fig. 5b shows the distribution for a source of light adapted to the direction of light in the area under the canopy.

During operation of the lamp will activate the light sources of both types. However, depending on the ratio of the intensities of both light sources is different cumulative distribution of light in the longitudinal direction. This can be seen in Fig. 6a-6c, which represent the combined light distribution for three different ratios, ranging from Fig. 6a, the proportion of the light source according to Fig. 5a gradually decreases, and the intensity of the light source according to Fig. 5b increases. As shown in the drawings, this change in the ratio leads to a more narrow cumulative distribution of light in the longitudinal direction, and the light distribution in the transverse direction does not change significantly. In this embodiment, where the light sources are LEDs 13, the ratio of the intensities of both groups LED can be easily changed by simply corresponding the functions of the numbers of activated LEDs 13 in each group.

Alternatively, it was also possible to change the direct current applied to the LED 13 both different sources 11, 12 light, to adjust the total light distribution of the lighting unit 10. For example, perhaps the excitement of all the LED 13 at 350 mA for a specific first light distribution, while the second light distribution is obtained by excitation of the LED at 200 mA and 500 mA, respectively. In addition, it is well known that the mute LED lights can be achieved through the excitation LED subjected to pulse width modulation pulse current and changes the fill factor. Thus, by controlling the fill factors, both of the light source can also be used to adjust the total longitudinal light distribution. In conclusion, we note that at the time of manufacture of the lighting unit could be preset to select optical means providing a desired amount of light to obtain, in the end, the desired light distribution. Of course, in this case, the configuration of the light distribution during operation of the lamp is possible.

Preferably, the intensity of both light sources change so as to maintain the total power consumption of the lamp. For example, the total number of activated LEDs can be kept constant.

It is evident from Fig. 6A-6C the SNO should what is proposed in the invention, the solution is suitable to adjust the light distribution of the lamp depending on the current situation. In particular, we could choose a specific ratio when installing the lights without having to provide different optical elements depending on the location of the lamps or the size of the road.

Although the alternative implementation shown in the drawings, contains only two different light source or two different groups of light sources, it is obvious that it could also increase the number of light sources. However, the effective adjustment of the light distribution can also be obtained in case of using only two different light sources.

In addition to this, it is possible to adjust the light distribution during operation of the system. This may be necessary in case of changing weather or road conditions. In a preferred embodiment, the lamp is adapted to automatically adjust the light distribution in the case when this situation occurs. Therefore, the lamp 1 includes a block 50 controls (shown schematically in Fig. 3) that controls the ratio of the intensities of the different light sources. The mentioned unit 50 controls coupled with the sensor 51, which provides information about the current weather situation. This sensor 51 may, for example, be a sensor to the Dublin core or etc. An alternative would also be possible to lights 1 were somehow connected with the Central control station, which provides external control signals, causing the lights to adjust the light distribution.

In conclusion, the invention provides a solution that allows for efficient and elegant way to adjust the light distribution of the lamp. In particular, it is also possible to consider the influence on the characteristics of the light distribution during operation of the system.

1. The lighting unit (10) for use in the lamp (1), in particular lantern for lighting of roads and/or streets, and referred to the lighting unit (10) has a custom light distribution, thus
the lighting unit (10) contains two sources (11, 12) of light, and each of the sources (11, 12) of the light contains a lot of led light sources (LED) (13),
one of these light sources has the characteristic of longitudinal light distribution,
another light source has the characteristic of longitudinal light distribution different from the characteristics of the longitudinal light distribution of the first source, and
the overall light distribution of the lighting unit (10) is adjusted by changing the ratio of the intensities of the two sources (11, 12) of the light,
characterized in that
the ratio of light output is s (sotoudeh) two light sources (11, 12) is changed by selecting the number of activated led light sources (LED) (13) for each of the two light sources (11, 12), and the total number of activated LEDs (13) remains constant.

2. Lighting unit under item 1, in which the aforementioned two sources (11, 12) of light are located on the same surface, preferably on a flat surface.

3. Lighting unit under item 1 or 2, in which each source (11, 12) of the light provided by the optical device or element (14, 15), and an optical device or element (14, 15) are designed for light distribution of the corresponding source (11, 12) of the light in accordance with an appropriate light distribution.

4. Lighting unit under item 1 or 2, which contains the block (50) to control the overall light distribution.

5. The lighting unit according to p. 4, in which the block (50) control is intended to control the overall light distribution in accordance with weather and/or road conditions.

6. The lighting unit according to p. 4, in which the block (50) control is intended to control the overall light distribution on the basis of external control signals.

7. Lamp (1) for lighting of roads and/or streets, containing the lighting unit (10) according to any one of paragraphs.1-6.

8. The method of setting the light distribution of the lamp (1), in particular lamp used for lighting is the same roads and/or streets,
and flashlight (1) contains two sources (11, 12) light and each of the light sources (11, 12) contains a number of led light sources (LED) (13),
one of these light sources has the characteristic of longitudinal light distribution,
another light source has the characteristic of longitudinal light distribution different from the characteristics of the longitudinal light distribution of the first source, and
the overall light distribution of the lamp (1) customize by changing the ratio of the intensities of the two sources (11, 12) of the light,
characterized in that
the ratio of the light outputs of the two light sources (11, 12) change by selecting the number of activated led light sources (LED) (13) for each of the two light sources (11, 12), and the total number of activated LEDs (13) leave permanent.

9. The method according to p. 8, in which the overall distribution of light is set in accordance with weather and/or road conditions.

10. The method according to any of paragraphs.8 or 9, in which the ratio of the light outputs of the two sources (11, 12) of the light change so that the total power consumption of lamp (1) is a constant.



 

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12 cl, 7 dwg

FIELD: technological processes.

SUBSTANCE: invention relates to lighting engineering. The illumination system comprises a light-emitting part (1), having light sources configured to emit light beams at different dominant wavelengths, and an image-forming optical system (3), having microlenses (3a) configured to focus the light beams emitted by the light-emitting part (1). The illumination system is configured to illuminate a liquid crystal panel with light beams passing through the image-forming optical system (3). The liquid crystal panel has pixels which are spaced apart by a predetermined spacing and each of which has display elements corresponding to each separate colour, and under the condition that the spacing of the pixels is denoted by P, and the image-forming optical system has a zoom factor (1/n), the light sources are spaced apart by a spacing P1, given as P1=n P, and the microlenses are spaced apart by a spacing P2, given as P2=(n/(n+1)) P.

EFFECT: high quality of display by suppressing non-uniformity of brightness and colour in the display screen.

32 cl, 16 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. A highlighting unit 12 consists of a LED 17, a chassis 14 including a base plate 14a mounted at the side opposite to the side of the light output in regard to the LED 17, at that the chassis 14 contains the LED 17 and the first reflective sheet 22 that reflects light. The first reflective sheet 22 includes a four-sided base 24 running along the base plate 14a and two elevated portions 25 and 26, each of these portions is elevated from each of two adjacent sides of the base 24 in direction of the light output. There is a junction J between two adjacent side edges 25a and 26b of the elevated portions 25 and 26. In the highlighting unit 12 the side edge 25a of the first elevated portion 25 out of the two elevated portions 25 and 26 has a face piece 28 faced to the side edge 26a of the elevated portion 26 in the same direction in which the first elevated part 25 is elevated from the base 24 outside towards axis Y, and the first elevated part 25 and the face piece 28 are extruded towards direction of the light output.

EFFECT: elimination of uneven brightness.

22 cl, 29 dwg

FIELD: electricity.

SUBSTANCE: invention relates to the field of lighting equipment. Lighting device (12) is equipped with a number of optical source cards (20) with variety of point optical sources (17) installed at them. Average colour tone of point optical sources (17) (POS) at each card (20) is in equivalent colour range defined by the square, and each opposite side of two square sides has coordinate length in the axis X equal to 0.015, and each opposite side of two square sides has coordinate length in the axis Y equal to 0.015 at the colour space chromaticity chart of International Commission on Illumination as of 1931. POS are categorized into three colour ranges defined by squares, at that each side of the square has a length of 0.015. At that the second and third ranges adjoin the first one that includes the above equivalent colour range. POS cards include the first cards with installed point optical sources in the first and second colour ranges, and the second cards with installed point optical sources in the first and third colour ranges. The first and second POS cards are placed in sequence.

EFFECT: providing total emission of practically uniform colour.

26 cl, 17 dwg

FIELD: electricity.

SUBSTANCE: lighting device includes a light source device U, units (31 - 35) of light guides, chassis (60) and a positioning part S. The chassis (60) comprises the light source device U and units (31 - 35) of light guides. The light source device U includes multiple sets of light sources P, arranged along the central line Lc. Each set of light sources P is a pair of light diodes (45), arranged so that it is equidistant from the central line Lc and facing each other. Each unit (31 - 35) of light guides is arranged between the appropriate set of light sources P. Light sources have two final surfaces E in the longitudinal direction, which face the light diodes (45). Positioning parts S are placed in the middle part of the appropriate units (31 - 35) of light guides in longitudinal direction on the central line Lc.

EFFECT: elimination of uneven brightness.

21 cl, 15 dwg

FIELD: electricity.

SUBSTANCE: light beam that left the first output face passes along the first channel and gets to the first input surface of the first window. Light beam that left the second output face passes along the second channel and gets to the second input surface of the second window. The light beam is discharged from the device via the first output surface of the first window and the second output surface of the second window. At the same time arrangement of the first window and second window in the form of an optical wedge with mutually perpendicular cylindrical surfaces or in the form of an optical wedge with a diffraction structure with rated relief applied onto the first input surface of the first window and the second input surface of the second window provides for formation of angular divergence of the light beam, which has asymmetric angular dimensions along the vertical line and horizontal line and change of its direction, providing for arrangement of the lower border of the light beam on the surface of a landing strip, and also provision of the specified direction of the axis of maximum brightness of light beam.

EFFECT: simplified design, reduced dimensions and weight of a device and improved technology for assembly into a landing strip surface.

10 cl, 5 dwg

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