CZ310003B6 - A luminaire with remotely controllable light technological parameters - Google Patents

Abstract

The luminaire with remotely controllable light technological parameters, with a light source as a part, lies in the fact thata) the light source consists at least of two parts selected from a set of parts L1 to L1+n, which are formed by individual LED chips and/or a group or groups of LED chips;b) at least one of the parts L1 to L1+n has a separately electronically controllable luminous flux;c) parts L1 to L1+n are fixed to various stationary components of the luminaire structure so that the luminous fluxes of these parts L1 to L1+n are radiated to various directions;d) some parts L1 to L1+n have a different colour of emitted light;e) individual parts L1 až L1+n are powered using separate power sources Z1 to Z1+n, which are controlled using a control circuit connected to the remote data communication.

Description

Luminaire with remote controllable light technical parameters

Field of technology

The invention falls into the field of electrical engineering. This is a device that enables luminaires, e.g. with LED technology, to remotely (software) change the lighting technical parameters of the luminaire, e.g. total luminous flux, emission angle (so-called luminance curve) and color temperature. The device, which is an intelligent lamp, thus receives data from the Ethernet network or via the power supply network, controls and regulates the lighting parameters remotely, and also transmits high-speed broadband data transmission via the visible spectrum (BroadbandLIGHT technology, VLC - Visible Light Communication) along the light beam.

Current state of the art

According to the current state of the art, luminaires are commonly used which either do not have the possibility to change the light technical parameters, or they can only be changed mechanically on a dismantled and disassembled luminaire.

In the current state of the art, changing the radiating angle of the lamps was only possible by mechanical replacement of the optical parts of the lamps, or it was possible to make subtle changes by locking them using screws that changed the focal length of the optical system. Changing the color temperature of the light (changing the shade of white light from warm yellowish to cool bluish) was possible only for the entire light fixture and usually only by replacing the entire light source. Luminaires according to the current state of the art either do not have the option of regulating the lighting intensity or have it regulated using pulse width modulation (PWM - Pulse Width Modulation), as stated for example in EP 2518398 A2. If the electric current directly passing through the LED chips is also modulated in this way, unnecessary energy losses or unpleasant optical effects (interference, stroboscopic phenomenon, etc.) may occur. In such a case, the luminaire cannot be used for high-speed data transmission along the light beam. The outdated DALI system, which was published in 1984 and is intended for the regulation of interior lighting, is mostly used to transmit the control command to the light fixture. It is not suitable for public lighting for many reasons, but it is still widely used today.

The essence of the invention

The above-mentioned disadvantages are removed by the invention, which uses the fact that in today's lamps there is no longer just one light source, but usually several or even a larger number. The essence of the invention is that the light sources in the lamp are divided into groups and these groups are mechanically fixed differently so that the main directions of their light flows are each directed in a different direction. Each of the groups of light sources also has its own separate control element enabling remote adjustment of the light flux. By combining different light characteristics emitted in different directions, the resulting directional characteristic of the luminaire (also called the luminance curve) is created, the shape of which can be remotely controlled by setting the individual groups.

Another essence of the invention is that each group of light sources contains subgroups of LEDs with different color temperature, while each of the subgroups of light sources also has its own separate control element enabling remote adjustment of the light flux. By setting different luminous flux to different subgroups with different chromaticity temperature, the resulting color temperature emitted in different directions or the resulting color temperature of the entire luminaire can be remotely changed.

- 1 CZ 310003 B6

For powering LED groups and subgroups, it is advantageous to use a multiple power supply, which can power several LED groups from one power supply (eg 230 V/50 Hz). It is very advantageous to use a power source for power supply, whose control circuit is directly connected to the Ethernet network, with the help of which data is transferred to its control circuit for remote adjustment of the luminous flux of individual groups and subgroups of LEDs. Data on the operational status of the luminaire (current supply currents, temperatures, faults, etc.) and data from other peripheral sensors and devices (e.g. humidity, illumination, meteorological measurements, audio devices, cameras, etc.). The mentioned Ethernet LED Driver makes it possible to communicate using data modulated on the phase wire (e.g. PowerLine system) in case of unavailability of an Ethernet connection.

By using the elements according to the above-mentioned essence of the invention, it is possible to construct an intelligent luminaire for public lighting with the function of receiving data from the Ethernet network or via the power supply network, remote control and regulation of lighting parameters and the above-standard possibility of transmitting high-speed broadband data transmission via the visible spectrum (BroadbandLIGHT technology, VLC Visible Light Communication) enabling the use of emitted light for data transmission along a light beam.

Clarification of drawings

Fig. 1 shows the basic assembly of two light sources as shown in embodiment 1. The lamp according to embodiment 2 is shown in Fig. 2. Fig. 3a and Fig. 3b show two examples of the shapes of the radiation directional characteristics (curves luminosity).

Examples of implementation of the invention

For the purposes of this application, it is important that the parts of the light source come from the set of parts Li to L1+n.

Example 1

This example is shown in Fig. 1, where it is a public lighting fixture. The luminaire contains at least one light source, which is further divided into two parts Li, L2, which are mechanically positioned so that the axes of their emission characteristics point in different directions.

Each of these two parts Li, L2 of the light source has a separately adjustable light flux level. The luminous flux of the luminaire is then controlled in the following way. When setting the first part Li of the light source to 100% light flux emission and the second part L2 of the light source to 0% light flux emission, the resulting direction of the emission characteristic is directed to the left of the light fixture.

When setting the first part Li of the light source to the level of 0% emission of luminous flux and the second part L2 of the same light source to 100% emission of luminous flux, the resulting direction of the emission characteristic is to the right of the lamp.

When setting the first part Li of the light source to 50% of the light flux emission level and the second part L2 of the same light source also to 50% of the light flux emission level, the resulting emission characteristic is directed to the middle.

By continuously changing the luminous flux of the first part Li of the light source from 100% to 0% of the luminous flux emission and at the same time by continuously changing the luminous flux of the second part L2 of the same light source from 0% to 100%, the center of the resulting emission characteristic is shifted from the direction to the left to the direction to the right.

- 2 CZ 310003 B6

A simultaneous and identical change in the luminous flux of both parts Li, L2 of the light source changes the resulting luminous flux of the entire luminaire, but does not change the direction of the center of the resulting radiation characteristic.

Example 2

This example is shown in Fig. 2, dealing with the setting of the chromaticity temperature.

The light source of the fixture contains at least two parts Li, L2 with different chromaticity temperatures.

It is necessary to change the chromaticity temperature of the luminaire. The first part Li of the light source has a chromaticity temperature of 3000 K and the second part L2 of the light source 5000 K. Each of these two parts Li, L2 of the light source has a separate, adjustable power source Zi, Z2, which sets the level of the light flux.

When the first part Li of the light source is set to 100% of the luminous flux level and the second part L2 of the same light source to 0% of the luminous flux level, the resulting chromaticity temperature is 3000 K. When the luminous flux of the first part of the Li light source is set to 0% of the luminous flux level and of the second part L2 of the light source at 100% luminous flux level, the resulting chromaticity temperature is 5000 K.

When setting the luminous flux of the first part Li of the light source to 50% of the luminous flux level and the second part of the L2 light source also to 50% of the luminous flux level, the resulting chromaticity temperature is 4000 K. By continuously changing the luminous fluxes of both parts of the Li, L2 light source, there is smooth change of the resulting chromaticity temperature. The assumption is that the two mentioned parts Li, L2 of the light source are sufficiently close to each other, and that the light emitted by them is dispersed together in a suitable way (e.g. by a diffuser).

Said parts Li, L2 of the light source are each made up of a single LED chip, a group of multiple chips or subgroups of larger systems.

Industrial applicability

Nowadays, manufacturers of public lighting fixtures produce a very wide range of types of fixtures, which are graded not only according to the nominal power input, but also according to the different shapes of the radiation characteristics and according to the color temperature. Different shapes of emission characteristics must be chosen according to the planned location of the luminaire, whether it will illuminate a pedestrian crossing or will be above the intersection on a very high mast or the luminaires will be on low masts with large distances, etc. Lighting with a luminaire emitting white light with a low chromaticity temperature (yellowish) is more effective in environments with reduced visibility (drizzle, snow), but is more energy demanding. This is due to the fact that LED chips with a higher color temperature have a higher luminous efficiency (specific light output).

By producing light fixtures according to the essence of the invention, it would be sufficient to produce a series of light fixtures only according to the power input. Although there would have to be more LED chips in such a light fixture, their price is still decreasing, and its increase would probably not exceed the costs of producing a very wide range of types and the costs of their storage, transportation, and logistics. By producing light fixtures according to the essence of the invention, it would be possible to reduce the costs of construction and reconstruction of public lighting systems. The use of intelligent functions and remote control is appropriate in "Smart City" systems.

Claims (2)

1. A lamp with remotely controllable light technical parameters, which includes a light source, characterized by the fact that 5 a) the light source is composed of at least two parts selected from the set of parts Li to Li+n, which are formed by individual LED chips and/or a group or groups of LED chips; b) at least one of the parts Li to Li+n has a separately electronically adjustable luminous flux; c) parts Li to Li+n are firmly attached to various fixed components of the structure of the lamp so that the light fluxes of these parts Li to Li+n are emitted in different directions; io d) some parts of Li to Li+n have a different color of emitted light; e) individual parts Li to Li+n are powered by separate power supplies Zi to Zi+n, which are controlled by a control circuit connected to remote data communication. 2. Luminaire with remotely controllable light technical parameters, a part of which is a light source according to claim 1, characterized in that the separately electronically adjustable light flux has a variable resulting luminance curve.