GB2448169A - Lighting system with wireless connection between control and lighting units - Google Patents
Lighting system with wireless connection between control and lighting units Download PDFInfo
- Publication number
- GB2448169A GB2448169A GB0706607A GB0706607A GB2448169A GB 2448169 A GB2448169 A GB 2448169A GB 0706607 A GB0706607 A GB 0706607A GB 0706607 A GB0706607 A GB 0706607A GB 2448169 A GB2448169 A GB 2448169A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lighting
- unit
- control signal
- lighting unit
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/175—Controlling the light source by remote control
- H05B47/19—Controlling the light source by remote control via wireless transmission
-
- H05B37/0272—
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
A lighting system comprises a number of lighting units (2) and a primary control unit (1). Each lighting unit has a light source (22), a control unit (21) to control the light source, a data transceiver (23) for receiving and transmitting data. The control unit selects a program or adjusts a running program, depending on signals received from the primary control unit via the transceiver. The lighting unit modifies the signal and retransmits it to further lighting units after a random delay time.
Description
LIGHTING SYSTEM
The present invention relates to a lighting system, a lighting unit for use in a lighting system and to a method of controlling a lighting system.
Lighting systems including a plurality of spatially distributed light sources are known.
WO 2006/129227 describes a lighting system with a base station and a pura1ity of lighting units. Each lighting unit has a light source and a controller unit. A base station has a transmitter to transmit control commands to the lighting units. The lighting units may each comprise an application storage with at least one application program describing an activation sequence. Upon control from the base station, the program is executed by the controller units of the lighting units. Command messages or periodic signalling messages may be used to synchronise program execution in all lighting units.
* The present invention seeks to provide a lighting system and a method of controlling the system providing improved operative capability. *.I.
The present invention relates to a lighting system according to claim I, a lighting unit 4. 20 according to claim 11 and a method according to claim 12. Dependent claims refer to preferred embodiments of the invention. S..
The lighting system of the present invention enables the lighting units to be set up and operatively controlled over greater distances as the control fI.tnction of the system is not limited by the wireless transmission range of the primary control unit.
The lighting system of the invention is thus particularly suitable for lighting systems for use over relatively large ranges such as street lighting systems. Most particularly the lighting system is suitable for use as a decorative street lighting system. The lighting units may each be comprised on a street lighting motif.
The lighting units comprise at least one light source. The tight source may be of any type, e.g. incandescent, fluorescent, tube, arc or LED. A lighting unit may also have a plurality of light sources, e.g. of different colour or arranged in a specific pattern. The lighting units have a controller unit storing a plurality of programs and configured to control the light source. Each control program contains a particular set of instructions for the operation of the light source. Controlling the light source may comprise turning the light source(s) on or off as well as changing the intensity and/or colour of the light source etc. One control program may comprise instructions for a predetermined time delay between the running of the program and the actuation of any or all light sources (for use in, for example, a switching on ceremony). One control program may comprise instructions to actuate all or particular light sources at a predetermined time of day or night (and preferably to subsequently deactivate the light sources at a particular time or after a particular period has elapsed). A control program may contain instructions such that the lighting units (or more specifically, the light sources of the lighting units) arc operated in a sequential manner, where "sequential" is used for any time-variant operation of a group of light sources, where not all light sources are operated simultaneously. The sequence may be a simple one by one sequence where light sources are activated one after the other. However the sequence may include more complex time-variant driving patterns suitable for e.g. representing animation of particular scenes or for representing "waves" of light. * 20
A lighting unit may comprise a plurality of controller units. This may particularly be * the case where a plurality of light sources are present on the lighting unit. A plurality of light sources present on a particular lighting unit may be operated by the controller or controllers in a sequential manner where "sequential" is used for any time-variant operation of a group of light sources, where not all light sources are operated simultaneously.
Preferably the lighting units are configured to receive their electrical operating power from a mains supply. Most preferably the lighting units are configure to tap off their electrical operating power from a mains-connected item of street furniture such as, for example, a lamppost. Alternatively the lighting units may comprise an energy storage unit delivering electrical energy. This may be a rechargeable or non-rechargeable battery, or a high capacity capacitor, which may, for example, be charged by solar cells.
The lighting units comprise a data reception means configured to receive a control signal comprising program selection data and/or program synchronisation data in dependence on which the controller unit then controls the light source. The data reception means receives the signal wirelessly to give great flexibility in placing the lighting units. The wireless reception means may be an infrared photodiode but is preferably a radio receiver. Most preferably the wireless reception means conforms to IEEE 802.15.4 standard (ZigBee).
At least one of the lighting units also comprises a data transmission means configured to wirelessly transmit a control signal comprising program selection data and/or program synchronisation data to a further lighting unit. The "first" lighting unit of claim is not limited to the closest lighting unit to the primary control unit.The term transmit is intended to include retransmission and relaying of the signal as well as generation of the signal by the lighting unit. Clearly it is preferable that the data * reception and transmission means (preferably of both the controller unit and of the lighting unit) are compatible. The wireless transmission means may be an infrared * light source but is preferably a radio transmitter. Most preferably the wireless I..
transmission means conforms to IEEE 802.15.4 standard (ZigBee). The transmission * . . * 20 means is preferably configured to transmit a particular control signal a predetermined : number of times. More preferably the signals are transmitted at a predetermined time- * interval. *.*
S
The data reception and transmission means may be comprised in the same device, e.g..
a transmitter-receiver or a transceiver.
The lighting system of the invention further includes a primary control unit. A primary control unit may also comprise the features of and function as a lighting unit.
The primary control unit may be stationary, e.g. connected to mains power, or may be mobile and/or battery operated. The primary control unit comprises data transmission means configured to wirelessly transmit a control signal comprising program selection data and/or program synchronisation data to at least one of the lighting units. The wireless transmission means may be an infrared light source but is preferably a radio transmitter. Most preferably the wireless transmission means conforms to IEEE 802.15.4 standard (ZigBee). The primary control unit is preferably configured to transmit a particular control signal a predetermined number of times at a predetermined interval to optimally maintain synchronisation of the lighting units.
The system of the invention is preferably configured such that more than one lighting unit is within operative range of the transmissions from the primary control unit and/or another lighting unit. If the lighting system is set up outside (i.e. external to a building) then the range of the signal transmission may vary depending on the weather conditions and the system is preferably configured accordingly, bearing in mind likely seasonal weather variations.
The wireless transmission means of the primary control unit and/or at least one of the lighting units are/is preferably configured to transmit the control signal over a 360 degree orientation. The system can thus be configured such that one primary control unit can transmit control signals to a plurality of strings of lighting units which extend :. in different directions. The system could thus be configured to have a central primary :..::: control unit positioned e.g. at a cross roads, with a plurality of lighting units *I.
positioned along each of the streets, such that each lighting set of lighting units : receives the control signals sent by the primary control unit. 20
* ** During operation of the lighting system the primary control unit transmits program selection data and/or program synchronisation data in a control signal to at least one *.* of the lighting units. The control signal may also comprise data indicating the speed at which the selected program should be run. The data reception means of the lighting unit(s) receive the control signal and the controller unit is operable to control the light source in dependence upon the control signal. In addition the lighting unit transmits the control signal, incorporating the program selection data and/or program synchronisation data, via the data transmission means, to a further lighting unit.
Preferably the lighting units are configured to continue with the previously selected program for a predetermined time in the event of the failure of the control signals from the primary control unit. A lighting unit will thus continue with its program if the control signal(s) from the primary control unit or a lighting unit are missed or corrupted.
Each lighting unit may comprise position recording means into which the sequential position of each lighting unit can be entered by the user. The position may be entered manually using a switch device or keys. Allocating a position to each lighting unit enables the lighting system to implement more complex programs. The lighting units in certain positions may, for example, only implement part of a particular program.
Preferably the lighting units comprise means to incorporate transmission data into the control signal for transmission to a further lighting unit whereby the resultant control signal indicates the number of times the signal has been transmitted by the lighting units. As the control signal "hops" from lighting unit to lighting unit, as it is received and transmitted, the control signal has data incorporated into it which indicates the number of hops the signal has been subjected to. Lighting units that receive the control signal including transmission data can then determine the consequent time delay using the known intrinsic time delay caused by reception and retransmission of the signal by the lighting unit. Alternatively the transmission data itself may indicate ". the time delay to the transmission from the primary control unit caused by the * **.
reception and transmission of the control signal by the lighting unit. If the system *** incorporates more than two lighting units the subsequent transmission from the S.. . . . . . * 20 second lighting unit can incorporate transmission data indicating that the control signal has been received and transmitted by two lighting units and so forth. The third * or subsequent lighting unit can then be instructed of the consequent time delay in the S..
control signal.
The lighting units preferably comprise time delay means to purposely delay the transmission of the control signal. The delay period is preferably different for each lighting unit. This avoids interference between simultaneous transmitted signals. The time delay means may comprise a randomiser unit to randomly delay the transmission of the control signal. The randomiser unit thus determines the amount of time the transmission is delayed by. This avoids the interference that would occur on simultaneous transmission by more than one lighting unit. The time delay means may form part of the controller unit.
Delay data indicating the amount of time the particular lighting unit delayed the transmission is preferably incorporated into the control signal for transmission to a further lighting unit.
The lighting units preferably comprise processing means configured to extract the transmission data regarding the number of times the signal has been received and transmitted by a lighting unit (or lighting units) and/or the delay data from the control signal and to adjust the program synchronisation accordingly. The processing means may form part of the controller unit of the lighting unit. The information regarding the number of transmissions and/or the transmission delay can be used by the next lighting unit to accurately synchronise the control of its light source with that of the other lighting units. As an example, if a control signal is transmitted by the primary control unit indicating that the lighting units should be implementing part B of program A the controller unit of the first lighting unit to receive the signal will ensure that the light source of that unit is implementing part B of program A. The first lighting unit will then transmit the control signal preferably after a particular delay or stagger time and incorporate data indicating that it has received and transmitted the *.I.
signal and also delay data indicating the delay time into the transmitted signal. The second lighting unit that receives the transmitted signal is provided with data 20 indicating that on original transmission of the signal it should have been implementing part B of program A. The signal also contains data indicating the * reception and transmission of the signal by the first lighting unit and the deliberate ** delay to the transmission of the signal. The processing means in the second lighting unit extracts this information and accordingly determines what part of program A the second lighting unit should be running, factoring in that the signal has been received and transmitted by one lighting unit and the delay caused by the transmission. The controller unit of the second lighting unit implements any correction necessary to the running program to ensure the synchronisation of the operation of its light source with regard to the light sources of the first lighting unit.
The transmitted control signals may preferably be encrypted to prevent unauthorised interference or disruption to the operation of the lighting system.
The present invention provides flexibility of operation and enables accurate synchronisation of a lighting system even over relatively large distance ranges.
Preferred embodiments of the present invention will now be described with reference to the drawings, in which: Figure 1 shows a symbolic representation of an embodiment of a primary control unit; Figure 2 shows a symbolic representation of an embodiment of a lighting unit; Figure 3 shows a symbolic configuration of an embodiment of a lighting system.
Referring to Figure 1 the primary control unit I comprises a central processor unit ii, typically a microprocessor, connected to all functional parts of the primary control unit. The primary control unit further comprises a memory unit 14 for storing control programs. An RF transmitter 12 is provided, which in the present embodiment is operated according to iEEE 802.15.4 standard (ZigBee), together with an antenna 13.
The primary control unit further comprises keys 15 and display 16. e. S...
20 Referring to Figure 2 the lighting unit 2 comprises a light source 22. Lighting unit 2 is powered by an external power source 24. A controller unit 21 controls operation of the light source 22 e.g. switches the light source on and off andlor reduces and *SS increases the intensity. The controller unit 21 is programmed with a plurality of control programs, identical to the programs stored on memory unit 14 of the primary control unit I. An RF transceiver unit 23 is provided, which in the present embodiment is a operated according to ZigBee. Position recording means 25, in the form of a selector button, is for the manual entry of the position allocation of the lighting unit by the user.
A lighting system as shown in Figure 3, comprises a primary control unit 1 and a plurality of lighting units 2a-2c as described above. The system may be configured as follows: The lighting units and primary control unit are programmed with the same set of control programs. Before, after or during the positioning of the lighting units in the desired position each lighting unit is allocated a position by the user using selector button 25.
Using keys 15 the user selects the program on the primary control unit. Feedback is given to the user via display 16. The user may then start the selected control program, e.g. using one of keys 15. As the control program is executed by central processing unit lithe primary control unit emits a control signal A via RF transmitter and antenna 12,13. Control signal A indicates the selected program, the speed at which the program should be run and the particular point in the program the primary control unit requires the lighting unit to be operating. S.
Control signal A is received by at least lighting unit 2a, positioned closest to the primary control unit. The control signal A is received by transceiver 23. Software * programmed into controller 21 extracts the relevant information, selects the specified *5*S point in the specified program and operates the light source 22 from the specified point in the specified program and at the required speed. The control program may contain specific position references in which case the controller, having had the 20 position allocated as described above, will implement the program according to the allocated position.
A randomiser in controller 21 determines the time delay or stagger before transmission of the control signal. An indication that one lighting unit has transmitted the control signal and of the subsequent time delay between reception and transmission of the control signal by lighting unit 2a is incorporated into the transmitted control signal B along with the original information from control signal A. Control signal B is transmitted by the RF transceiver unit 23.
Control signal B is received at least by lighting unit 2b. The control signal B is received by transceiver 23. Software programmed into controller 21 extracts the relevant information from the control signal, including the time delay and the first transmission indication, and resolves this information to operate the lighting unit 2b in synchronisation with lighting unit 2a. The light source is operated from the determined point in the specified program and at the required speed. The control program may contain specific position references in which case the controller, having had the position allocated as described above, will implement the program according to the allocated position.
A randomiser in controller 21 determines the time interval or stagger before transmission of the control signal. An indication that a further lighting unit has transmitted the control signal and of the subsequent time delay between reception and transmission of the control signal by lighting unit 2b is incorporated into the transmitted control signal C along with the original information from control signal B. Control signal C thus includes information indicating the total time delay between the reception of signal A by lighting unit 2a and its transmission by lighting unit 2b.
Control signal C is transmitted by the RF transceiver unit 23. I...
" 15 Control signal C is received by the final lighting unit 2c. The control signal C is * : received by transceiver 23. Software programmed into controller 21 extracts the relevant information, including the time delay indication and the two transmissions, and resolves this information to synchronise the operation of the lighting unit 2c with the operation of lighting units 2a and 2b. The light source 22 is operated from the * 20 determined point in the specified program and at the required speed. The control program may contain specific position references in which case the controller, having had the position allocated as described above, will implement the program according to the allocated position. As lighting unit 2c is the final unit in the configuration it does not transmit the control signal to a further lighting unit but of course may have capability to do so.
Clearly the lighting units may be positioned as required by the user to produce a desired visual effect.
The primary control unit A transmits control signal A a predetermined number of times before recalibrating, i.e. adjusting one or more of the speed, program point or the program selection, and transmitting an updated control signal. The lighting units may transmit a particular signal a predetermined number of times to reduce the chance of a transmission being missed by a lighting unit. The staggering of the transmission by individual lighting units reduces the likelihood of repeat signals interfering.
For clarity the control signal reception and transmission has been represented and described above as passing from the primary control unit to the closest lighting unit 2a and from unit 2a to unit 2b and from unit 2b to 2c. However, the signal transmission of the present invention is not limited to such a sequential order as the control signal from each lighting unit and the primary control unit may be received by more than one lighting unit which are in range of the transmitted control signal. The control signal may be transmitted in all directions and may thus be received by lighting units positioned "behind" as well as "in front" of the transmitting lighting unit. For example, the control signal A from the primary control unit may be received by units 2b and 2c. The control signal B transmitted by the lighting unit 2a may also be received by unit 2c as well as 2b. The control signal C transmitted by the lighting unit 2b may also be received by unit 2a as well as unit 2c. There may thus be various routes rather than one fixed route that the control signal could take before being :. received by a particular lighting unit. This flexibility reduces the chance of one malfunctioning lighting unit preventing the control signal reaching subsequent lighting units.
The inclusion of stagger time delay data and data relating to the number of times the signal has been received and retransmitted by the lighting units into the control signal enables the lighting units to synchronise the running of the selected program despite the various routes the control signal may have taken before reaching the particular lighting unit.
The controller units of the lighting units may be configured such that they ignore particular signal transmissions that they have already received as could occur in the situations described above where, for example, lighting unit 2c may receive the control signals A, B and C. The signals may be further coded to enable the controller units to make this determination.
II
One possible modification to the above examples is that the primary control unit may be connected to a personal computer (or comparable device) to upload and modify programs etc. The above described features of individual embodiments, as well as the further defined modifications, may be combined as desirable for a given application. S. * S * S.. S... * S
S S..
I * *5 * S S
S 20
Claims (16)
1. A lighting system comprising a primary control unit and a plurality of lighting units, each lighting unit comprising: a light source; a controller unit configured to control said light source and programmed with a plurality of control programs; a data reception means configured to receive a wireless control signal; the controller unit being operable to select a program and/or adjust the running of a selected program in dependence upon the control signal, wherein said primary control unit comprises data transmission means configured to transmit a wireless control signal to the first of said lighting units, and wherein said first lighting unit further comprises: * a data transmission means configured to transmit a wireless control signal to a :..::: further lighting unit.
***. 15
2. A lighting system according to claim I wherein each lighting unit comprises a data transmission means configured to transmit a wireless control signal to a further lighting unit.
3. A lighting system according to any preceding claim, wherein the primary control unit and/or the data transmission means of the or each lighting unit is configured to transmit control signals at predetermined intervals.
4. A lighting system according to any preceding claim, wherein the lighting units are configured to continue with the selected program for a predetermined time in the event of the failure of the control signal(s) from the primary control unit.
5. A lighting system according to any preceding claim, wherein said lighting units further comprises position recording means into which an allocated sequence position can be entered.
6. A lighting system according to any preceding claim, wherein the or each lighting unit comprises means to incorporate transmission data into the transmitted control signal whereby the resultant control signal indicates the number of times the signal has been received and transmitted by the lighting units.
7. A lighting system according to any preceding claim, wherein the or each lighting unit comprises time delay means to delay the transmission of the data signal.
8. A lighting system according to claim 7, wherein the time delay means comprises a randomiser unit configured to randomly select a period of time and delay the transmission of the signal accordingly.
9. A lighting system according to claim 7 or claim 8, wherein :.::: the or each lighting unit further comprises means to incorporate delay data, indicating the delay period, into the control signal for transmission to a further lighting unit. S...
10. A lighting system according to any of claims 6 to 9, wherein the or each lighting unit comprises processing means configured to extract the transmission data and/or delay data from the control signal and to adjust the running : 20 of the control program accordingly.
11. A lighting unit for use in a system according to any of the above claims, comprising a light source, a controller unit configured to control said light source and programmed with a plurality of control programs, a data reception means configured to receive a wireless control signal wherein the controller operates in dependence on the control signal, and a data transmission means configured to transmit the wireless control signal to a further lighting unit.
12. A method of controlling a lighting system, the lighting system comprising a primary control unit and a plurality of lighting units, each lighting unit having a light source and means for storing a plurality of control programs containing instructions for the control of the light source, wherein the method comprises the steps of: a) the primary control unit transmitting a control signal comprising program selection data and/or program synchronisation data wirelessly to at least one of said lighting units, b) the lighting unit receiving the wireless control signal and selecting a control program and/or synchronising a selected control program in dependence on the control signal, c) the lighting unit transmitting a wireless control signal to a further lighting unit.
13. A method according to claim 12, wherein the transmitted control signal in step c incorporates data indicating the signal has been transmitted by the lighting unit. S...
14. A method according to any of claims 12 or 13, wherein the transmission of the control signal in step c is delayed by a particular amount of time.
15. A method according to claim 14, wherein the transmitted control signal comprises data indicating the time delay.
16. A method according to any of claims 12 to 15 wherein steps b and c are repeated by a further lighting unit or units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0706607A GB2448169A (en) | 2007-04-04 | 2007-04-04 | Lighting system with wireless connection between control and lighting units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0706607A GB2448169A (en) | 2007-04-04 | 2007-04-04 | Lighting system with wireless connection between control and lighting units |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0706607D0 GB0706607D0 (en) | 2007-05-16 |
| GB2448169A true GB2448169A (en) | 2008-10-08 |
Family
ID=38090878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0706607A Withdrawn GB2448169A (en) | 2007-04-04 | 2007-04-04 | Lighting system with wireless connection between control and lighting units |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2448169A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITDP20100004A1 (en) * | 2010-05-19 | 2011-11-19 | Claudia Castaldo | INTERACTIVE LEDS LAMP. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6456960B1 (en) * | 1997-04-16 | 2002-09-24 | A.L. Air Data, Inc. | Lamp monitoring and control unit and method |
| US20040160199A1 (en) * | 2001-05-30 | 2004-08-19 | Color Kinetics, Inc. | Controlled lighting methods and apparatus |
| WO2006129227A2 (en) * | 2005-06-02 | 2006-12-07 | Philips Intellectual Property & Standards Gmbh | Lighting system and method for controlling a lighting system |
| WO2007033053A2 (en) * | 2005-09-12 | 2007-03-22 | Acuity Brands, Inc. | Control of a light management system network |
-
2007
- 2007-04-04 GB GB0706607A patent/GB2448169A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6456960B1 (en) * | 1997-04-16 | 2002-09-24 | A.L. Air Data, Inc. | Lamp monitoring and control unit and method |
| US20040160199A1 (en) * | 2001-05-30 | 2004-08-19 | Color Kinetics, Inc. | Controlled lighting methods and apparatus |
| WO2006129227A2 (en) * | 2005-06-02 | 2006-12-07 | Philips Intellectual Property & Standards Gmbh | Lighting system and method for controlling a lighting system |
| WO2007033053A2 (en) * | 2005-09-12 | 2007-03-22 | Acuity Brands, Inc. | Control of a light management system network |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITDP20100004A1 (en) * | 2010-05-19 | 2011-11-19 | Claudia Castaldo | INTERACTIVE LEDS LAMP. |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0706607D0 (en) | 2007-05-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1631869B1 (en) | System bridge and timeclock for rf controlled lighting systems | |
| EP0872162B1 (en) | Lighting control | |
| US20080211427A1 (en) | Lighting System and Method for Controlling a Lighting System | |
| US8829809B2 (en) | Wireless scene arrangement | |
| EP1915890B1 (en) | Selective control of lighting devices | |
| CN107926103A (en) | Debugging and control load control apparatus | |
| CN103068095A (en) | Illuminating system and control method thereof | |
| EP2521426B1 (en) | Device and method for controlling lighting control system | |
| KR20080071878A (en) | System for controlling lighting device and method | |
| EP2446710B1 (en) | Pushbits for semi-synchronized pointing | |
| US20170148308A1 (en) | Method for adding a security code to multiple receivers during power-up | |
| WO2011028908A1 (en) | Method of selecting a transmission frequency of a one-way wireless remote control device | |
| JP3918460B2 (en) | Lighting system | |
| EP3340745B1 (en) | Distributed lighting networks | |
| GB2448169A (en) | Lighting system with wireless connection between control and lighting units | |
| EP2132961B1 (en) | Control circuit, system for operating a device and device for programming such a control circuit | |
| CN201886735U (en) | Remote control LED (light emitting diode) light-emitting word control system | |
| US20090051503A1 (en) | Wireless timer system | |
| US20110273278A1 (en) | System and Method for Transmitting Information | |
| US20090315478A1 (en) | Lighting system having master and slave lighting fixtures | |
| KR101929523B1 (en) | Apparatus for controlling light using infrared ray communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |