A lighting control system and a control method thereof

Abstract

A lighting control system and a control method thereof, the system comprising an energy storage unit, a voltage detection unit, a switch control unit, a switch, an input voltage control unit and an enable instruction control unit: the energy storage unit, whose first end is coupled to the input voltage control unit, is used to receive the input voltage and store energy to generate an energy storage voltage; the voltage detection unit is used to detect the energy storage voltage and output the energy storage voltage detection result; the switch control unit, whose first end is coupled to the enable instruction control unit, is used to receive the enable instruction, and whose second end is coupled to the voltage detection unit, is used to receive the energy storage voltage detection result; the switch is coupled to one or more lamps to control the turning on and off of the lamps; wherein the switch control unit controls the switch according to the enable instruction and the energy storage voltage detection result. The present invention can improve the power supply stability.

Description

Technical Field

[0001] The present invention relates to the field of electronic technology, and in particular to a lighting control system and a control method thereof. Background Art

[0002] In the prior art, various sensors can transform the measured information into electrical signals or other appropriate forms of information output according to preset rules, thereby meeting the requirements of information transmission, processing, storage, display, recording and control, and have been widely used.

[0003] In an existing lighting control system, wireless lighting can be achieved based on Radio Frequency Identification (RFID) technology.

[0004] Specifically, RFID technology is a non-contact automatic identification technology that automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require human intervention and can work in various harsh environments. RFID can identify high-speed moving objects and can identify multiple electronic tags at the same time, and the operation is quick and convenient.

[0005] However, when the power input is insufficient and unstable, the existing lighting control system is easily affected by power interference, resulting in poor power supply stability. Summary of the invention

[0006] The technical problem solved by the present invention is to provide a lighting control system and a control method thereof, which can be provided with an energy storage unit, and turn the light on or off according to its energy storage voltage and an enable instruction, thereby having the opportunity to improve the power supply stability and effectively avoid the problem of the light being accidentally turned off or the brightness being too low.

[0007] To solve the above technical problems, an embodiment of the present invention provides a lighting control system, including an energy storage unit, a voltage detection unit, a switch control unit, a switch, an input voltage control unit and an enable instruction control unit: the energy storage unit, a first end of which is coupled to the input voltage control unit, for receiving an input voltage and storing energy to generate an energy storage voltage; the voltage detection unit, for detecting the energy storage voltage and outputting an energy storage voltage detection result; the switch control unit, a first end of which is coupled to the enable instruction control unit, for receiving an enable instruction, and a second end of which is coupled to the voltage detection unit, for receiving the energy storage voltage detection result; the switch, coupled to one or more lamps to control the turning on and off of the lamps; wherein the switch control unit controls the switch according to the enable instruction and the energy storage voltage detection result.

[0008] Optionally, when the enable instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to a first preset threshold voltage, the switch control unit controls the switch to be turned on; when the enable instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is less than a second preset threshold voltage, the switch control unit controls the switch to be turned off; when the enable instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage, the switch control unit controls the switch to maintain the current state; wherein, the first preset threshold voltage is greater than the second preset threshold voltage.

[0009] Optionally, the input voltage control unit is coupled to the antenna module, and is used to receive electromagnetic wave energy in the external environment from the antenna module, and boost and rectify the electromagnetic wave energy to output at least a portion of the input voltage.

[0010] Optionally, the input voltage control unit receives a first signal-free modulated carrier from the outside, and outputs a portion of the input voltage according to the electromagnetic wave energy carried by the first signal-free modulated carrier. Optionally, one or more of the following conditions are met: the first signal-free modulated carrier is an unmodulated electromagnetic wave beam; the duration of the first signal-free modulated carrier is 0 to 5 seconds; the first signal-free modulated carrier is called a pilot carrier.

[0011] Optionally, the lighting control system also includes: an RF input and output port, which is coupled to the antenna module and the input voltage control unit respectively, and the input voltage control unit receives electromagnetic wave energy in the external environment and the first signal-free modulated carrier from the antenna module via the RF input and output port.

[0012] Optionally, the enable instruction control unit is used to receive an external control instruction, and then compare whether the system ID contained in the external control instruction is consistent with the system ID information of the lighting control system, and / or compare whether the switch ID information contained in the external control instruction is consistent with the ID information of the switch, and when they are consistent, issue an enable instruction to enable the switch.

[0013] Optionally, the external control instruction is compatible with the selection instruction of ISO18000-6C.

[0014] Optionally, after issuing an enable instruction to enable the switch, the enable instruction control unit receives a second signal-free modulated carrier of a preset duration from the outside, and issues an enable instruction to disable the switch when the second signal-free modulated carrier ends.

[0015] Optionally, one or more of the following conditions are met: the second carrier wave without signal modulation is an unmodulated electromagnetic wave beam; the duration of the second carrier wave without signal modulation is 0 to 5 s; and the second carrier wave without signal modulation is called a successor carrier.

[0016] Optionally, when the strength of the second carrier wave modulated without a signal drops to less than -10 dBm, the enabling instruction control unit determines that the second carrier wave modulated without a signal ends.

[0017] Optionally, the lighting control system further includes: an RF input / output port coupled to the enable instruction control unit, and the enable instruction control unit receives an external control instruction and the second signal-free modulated carrier via the RF input / output port.

[0018] Optionally, the external control instruction is compatible with UHF RFID protocol.

[0019] Optionally, the lighting control system further includes: a boost unit, a first end of which is coupled to the energy storage unit, and a second end of which is coupled to the switch, for increasing the energy storage voltage to the preset energy storage threshold voltage and outputting it to the switch when the energy storage voltage is lower than a preset energy storage threshold voltage.

[0020] In order to solve the above technical problems, an embodiment of the present invention also provides a control method based on the above lighting control system, including: using an energy storage unit to receive the input voltage of the input voltage control unit and storing energy to generate an energy storage voltage, and the first end of the energy storage unit is coupled to the input voltage control unit; using a voltage detection unit to detect the energy storage voltage and output the energy storage voltage detection result; using a switch control unit to receive an enable instruction from an enable instruction control unit, and receive the energy storage voltage detection result from a voltage detection unit, wherein the first end of the switch control unit is coupled to the enable instruction control unit, and the second end of the switch control unit is coupled to the voltage detection unit; using the switch control unit to control the switch according to the enable instruction and the energy storage voltage detection result, wherein the switch is coupled to one or more lamps to control the turning on and off of the lamps.

[0021] Optionally, before using the energy storage unit to receive the input voltage of the input voltage control unit, the control method also includes: using the input voltage control unit to receive electromagnetic wave energy in the external environment from the antenna module, and boosting and rectifying the electromagnetic wave energy to output at least a part of the input voltage; wherein the input voltage control unit is coupled to the antenna module.

[0022] Optionally, the input voltage control unit is used to receive a first signal-free modulated carrier from the outside, and output a portion of the input voltage according to electromagnetic wave energy carried by the first signal-free modulated carrier.

[0023] Optionally, one or more of the following conditions are met: the first carrier without signal modulation is an unmodulated electromagnetic wave beam; the duration of the first carrier without signal modulation is 0 to 5s; the first carrier without signal modulation is called a pilot carrier.

[0024] Optionally, after using the input voltage control unit to receive a first signal-free modulated carrier from the outside, the control method further includes: using the enable instruction control unit to receive an external control instruction, and then comparing whether the system ID contained in the external control instruction is consistent with the system ID information of the lighting control system, and / or comparing whether the switch ID information contained in the external control instruction is consistent with the ID information of the switch, and issuing an enable instruction to enable the switch when they are consistent.

[0025] Optionally, the external control instruction is compatible with the selection instruction of ISO18000-6C.

[0026] Optionally, after the enable instruction control unit is used to issue an enable instruction to enable the switch, the control method further includes: using the enable instruction control unit to externally receive a second signal-free modulated carrier of a preset duration, and issuing an enable instruction to disable the switch when the second signal-free modulated carrier ends.

[0027] Optionally, one or more of the following conditions are met: the second carrier wave without signal modulation is an unmodulated electromagnetic wave beam; the duration of the second carrier wave without signal modulation is 0 to 5 s; and the second carrier wave without signal modulation is called a successor carrier.

[0028] Optionally, when the strength of the second carrier wave modulated without a signal drops to less than -10 dBm, the enabling instruction control unit determines that the second carrier wave modulated without a signal ends.

[0029] Optionally, the control method further includes: when the energy storage voltage is lower than a preset energy storage threshold voltage, using a boost unit to increase the energy storage voltage to the preset energy storage threshold voltage and output it to the switch.

[0030] Compared with the prior art, the technical solution of the embodiment of the present invention has the following beneficial effects:

[0031] In the embodiment of the present invention, by setting an energy storage unit and a voltage detection unit, the energy storage voltage can be detected, and then the switch can be controlled according to the enable instruction and the energy storage voltage detection result. Compared with the prior art that the light is turned on only according to the external input voltage exceeding the voltage threshold or the external input power exceeding the power threshold, which leads to insufficient and unstable power input, it is easy to cause accidental shutdown or low brightness. By adopting the solution of the embodiment of the present invention, an energy storage unit can be set, and the light can be turned on or off according to its energy storage voltage and the enable instruction, which has the opportunity to improve the power supply stability and effectively avoid the problem of accidental shutdown or low brightness of the light.

[0032] Furthermore, when the enable instruction indicates that the switch is enabled and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage, the switch control unit controls the switch to maintain the current state, which is equivalent to setting the region where the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage as a buffer voltage region, and not changing the switch state within the buffer voltage region until the energy storage voltage is increased or decreased to exceed the buffer voltage region, then determining whether to control the switch to be turned on or off according to the size of the energy storage voltage, which helps to further improve the power supply stability and effectively avoid the problem of accidental shutdown of the lamp or too low brightness.

[0033] Furthermore, the input voltage control unit is coupled to the antenna module, and is used to receive electromagnetic wave energy in the external environment from the antenna module, and to boost and rectify the electromagnetic wave energy to output at least a portion of the input voltage. This allows power supply to be achieved based on environmental electromagnetic wave energy without relying on batteries or external power input, and can more effectively meet user needs in working scenarios where wired power supply or battery replacement is not applicable.

[0034] Furthermore, the input voltage control unit receives a first signal-free modulated carrier from the outside, and outputs a portion of the input voltage according to the electromagnetic wave energy carried by the first signal-free modulated carrier, which can supplement an additional portion of electrical energy in addition to the ambient electromagnetic wave energy, thereby helping to charge the energy storage unit faster and improve power supply efficiency.

[0035] Furthermore, after issuing an enable instruction to enable the switch, the enable instruction control unit receives a second signal-free modulated carrier of a preset duration from the outside, and issues an enable instruction to disable the switch at the end of the second signal-free modulated carrier, thereby extending the enable time. Since the switch is controlled to be turned on only when the enable instruction indicates to enable the switch, extending the enable time is equivalent to extending the lighting duration, and the extended carrier can increase the charging of the energy storage unit, which helps to prevent the light from turning off or flickering quickly.

[0036] Furthermore, the external control instruction is compatible with the UHF RFID protocol, and the existing RFID protocol can be reused to implement the functions of the present application, thereby improving the convenience of control.

[0037] Furthermore, the lighting control system also includes a boost unit, which is used to increase the energy storage voltage to the preset energy storage threshold voltage and output it to the switch when the energy storage voltage is lower than the preset energy storage threshold voltage. When the energy storage voltage is low, the energy storage voltage can be increased to a uniform voltage level, which helps to maintain the brightness of the lamp and effectively avoid changes in brightness of the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a lighting control system in an embodiment of the present invention;

[0039] Figure 2 is a structural schematic diagram of another lighting control system in an embodiment of the present invention;

[0040] Figure 3 It is a structural schematic diagram of another lighting control system in an embodiment of the present invention. DETAILED DESCRIPTION

[0041] As mentioned above, in an existing lighting control system, wireless lighting can be achieved based on RFID technology.

[0042] The RFID system is a simple wireless system with two basic components. The system is used to control, detect and track objects. The RFID system consists of an interrogator (also called a reader) and many transponders (also called or electronic tags). RFID is divided into low frequency (LF), high frequency (HF), ultra high frequency (UHF), and microwave (MW) according to the different application frequencies. The corresponding representative frequencies are: low frequency below 135KHz, high frequency 13.56MHz, ultra high frequency 860M-960MHz, microwave 2.4GHz and 5.8GHz.

[0043] Composition of RFID: Electronic tag (Tag): composed of coupling elements and chips, each electronic tag has a unique electronic code, attached to an object to identify the target object; Reader (Reader): a device that reads (and sometimes writes) electronic tag information, which can be designed to be handheld or fixed; Antenna (Antenna): transmits radio frequency signals between the electronic tag and the reader.

[0044] The basic working principle of RFID technology is not complicated. After the electronic tag enters the magnetic field, it receives the radio frequency signal emitted by the reader and uses the energy obtained from the induced current to send out the product information stored in the chip (Passive Tag, passive tag or passive tag), or actively send a signal of a certain frequency (Active Tag, active tag or active tag); after the reader reads and decodes the information, it sends it to the central information system for relevant data processing.

[0045] The reader can be a read or read / write device depending on the structure and technology used. It is the information control and processing center of the RFID system. The reader is usually composed of a coupling module, a transceiver module, a control module and an interface unit. The reader and the transponder generally use half-duplex communication to exchange information, and the reader provides energy and timing to the passive transponder through coupling. In practical applications, the management functions such as the collection, processing and remote transmission of object identification information can be further realized through the network. The transponder is the information carrier of the RFID system. At present, most transponders are passive units composed of coupling elements (coils, microstrip antennas, etc.) and microchips.

[0046] However, when the power input is insufficient and unstable, the existing lighting control system is easily affected by power interference, resulting in poor power supply stability.

[0047] After research, the inventor of the present invention found that in the prior art, the light switch is turned on only when the external input voltage exceeds the voltage threshold or the external input power exceeds the power threshold, and the light switch is turned off when the external input voltage is lower than the voltage threshold or the external input power is lower than the power threshold. This causes the light to be easily shut down by mistake or the brightness is too low when the power input power is insufficient and unstable, resulting in poor power supply stability.

[0048] In the embodiment of the present invention, by setting an energy storage unit and a voltage detection unit, the energy storage voltage can be detected, and then the switch can be controlled according to the enable instruction and the energy storage voltage detection result. Compared with the prior art that the light is turned on only according to the external input voltage exceeding the voltage threshold or the external input power exceeding the power threshold, which leads to insufficient and unstable power input, it is easy to cause accidental shutdown or low brightness. By adopting the solution of the embodiment of the present invention, an energy storage unit can be set, and the light can be turned on or off according to its energy storage voltage and the enable instruction, which has the opportunity to improve the power supply stability and effectively avoid the problem of accidental shutdown or low brightness of the light.

[0049] In order to make the above-mentioned objects, features and beneficial effects of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0050] Reference Figure 1 , Figure 1 It is a structural schematic diagram of a lighting control system in an embodiment of the present invention.

[0051] The lighting control system may include an energy storage unit 11 , a voltage detection unit 12 , a switch control unit 13 , a switch 14 , an input voltage control unit 15 , and an enable instruction control unit 16 .

[0052] The energy storage unit 11 has a first end coupled to the input voltage control unit 15 for receiving an input voltage and storing energy to generate an energy storage voltage.

[0053] In a specific implementation, the energy storage unit 11 may be a capacitor.

[0054] The voltage detection unit 12 is used to detect the energy storage voltage and output the energy storage voltage detection result.

[0055] In a specific implementation, the energy storage voltage detection result can be used to indicate the voltage value of the energy storage voltage.

[0056] The switch control unit 13 has a first end coupled to the enable instruction control unit 16 for receiving the enable instruction, and a second end coupled to the voltage detection unit for receiving the energy storage voltage detection result.

[0057] The switch 14 is coupled to one or more lights to control the turning on and off of the lights.

[0058] The switch control unit controls the switch according to the enable instruction and the energy storage voltage detection result.

[0059] Furthermore, each lighting control system may include a single switch 14 .

[0060] In the embodiment of the present invention, by setting the relationship between the lighting control system and the switch 14 to be one-to-one, it helps to improve the accuracy of controlling the switch.

[0061] Furthermore, the lamp may be a light emitting diode (LED) 17 .

[0062] Specifically, the light-emitting diode is composed of a PN junction like an ordinary diode and also has unidirectional conductivity. When a forward voltage is applied to the light-emitting diode, the holes injected from the P region into the N region and the electrons injected from the N region into the P region recombine with the electrons in the N region and the holes in the P region within a few microns near the PN junction, respectively, to produce spontaneously radiated fluorescence. The energy states of electrons and holes in different semiconductor materials are different. When electrons and holes recombine, the amount of energy released is different. The more energy released, the shorter the wavelength of the light emitted. Commonly used are diodes that emit red, green or yellow light. The reverse breakdown voltage of the light-emitting diode is greater than 5 volts. Its forward volt-ampere characteristic curve is very steep, and a current-limiting resistor must be connected in series to control the current passing through the diode when used.

[0063] The core part of the light-emitting diode can be a wafer composed of a P-type semiconductor and an N-type semiconductor. There is a transition layer between the P-type semiconductor and the N-type semiconductor, which is called a PN junction. In the PN junction of some semiconductor materials, the injected minority carriers will release the excess energy in the form of light when they recombine with the majority carriers, thereby directly converting electrical energy into light energy. When a reverse voltage is applied to the PN junction, it is difficult for minority carriers to be injected, so no light is emitted. When it is in the forward working state (i.e., a forward voltage is applied to both ends), when the current flows from the LED anode to the cathode, the semiconductor crystal emits light of different colors from ultraviolet to infrared, and the intensity of the light is related to the current. It can efficiently convert electrical energy into light energy and has a wide range of uses in modern society, such as lighting, flat panel displays, signal indication, etc.

[0064] In the embodiment of the present invention, by setting up an energy storage unit 11 and a voltage detection unit 12, the energy storage voltage can be detected, and then the switch can be controlled according to the enable instruction and the energy storage voltage detection result. Compared with the prior art that the light is turned on only when the external input voltage exceeds the voltage threshold or the external input power exceeds the power threshold, which leads to insufficient and unstable power input, it is easy to cause accidental shutdown or low brightness. By adopting the solution of the embodiment of the present invention, an energy storage unit can be set, and the light can be turned on or off according to its energy storage voltage and the enable instruction, which has the opportunity to improve the power supply stability and effectively avoid the problem of accidental shutdown or low brightness of the light.

[0065] Further, when the enable instruction indicates to enable the switch 14, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to a first preset threshold voltage, the switch control unit 13 controls the switch 14 to be turned on; when the enable instruction indicates to enable the switch 14, and the energy storage voltage detection result indicates that the energy storage voltage is less than a second preset threshold voltage, the switch control unit 13 controls the switch 14 to be turned off; when the enable instruction indicates to enable the switch 14, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage, the switch control unit 13 controls the switch 14 to maintain the current state; wherein, the first preset threshold voltage is greater than the second preset threshold voltage.

[0066] Refer to Table 1, which is a state truth table of the switch control unit 13 controlling the switch 14. In Table 1, it is taken as an example that the GPIO, the high voltage detection output, and the low voltage detection output are all enabled at a high level.

[0067] Table 1

[0068] GPIO High voltage detection output Low voltage detection output Switching output Low -- -- Low high high -- high high -- high Keep high Low Low Low

[0069] In the embodiment of the present invention, when the enable instruction indicates that the switch 14 is enabled and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage, the switch control unit 13 controls the switch 14 to maintain the current state, which is equivalent to setting the region where the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage as a buffer voltage region, and not changing the switch state in the buffer voltage region until the energy storage voltage is increased or decreased to exceed the buffer voltage region, then determining whether to control the switch to be turned on or off according to the size of the energy storage voltage, which helps to further improve the power supply stability and effectively avoid the problem of accidental shutdown of the lamp or too low brightness.

[0070] Reference Figure 2 , Figure 2 Schematic diagram of another lighting control system in an embodiment of the present invention. The another lighting control system may include Figure 1 The energy storage unit 11 , the voltage detection unit 12 , the switch control unit 13 , the switch 14 , the input voltage control unit 15 and the enable instruction control unit 16 shown may further include an antenna module 21 and an RF input and output port 22 .

[0071] The input voltage control unit 15 may be coupled to the antenna module 21 to receive electromagnetic wave energy in the external environment from the antenna module 21 and boost and rectify the electromagnetic wave energy to output at least a portion of the input voltage.

[0072] In an embodiment of the present invention, the input voltage control unit 15 is arranged to be coupled to the antenna module 21, so as to receive electromagnetic wave energy in the external environment from the antenna module 21, and to boost and rectify the electromagnetic wave energy to output at least a portion of the input voltage. This allows power supply to be achieved based on environmental electromagnetic wave energy without relying on a battery or external power input, and can more effectively meet user needs in working scenarios where wired power supply or battery replacement is not applicable.

[0073] Furthermore, the input voltage control unit 15 may receive a first signal-free modulated carrier from the outside, and output a portion of the input voltage according to the electromagnetic wave energy carried by the first signal-free modulated carrier.

[0074] In a specific implementation, a reader may be configured to send a carrier wave without signal modulation to the field area. As mentioned above, the reader may be configured based on the working principle of RFID.

[0075] Furthermore, the first carrier without signal modulation may satisfy one or more of the following conditions: the first carrier without signal modulation is an unmodulated electromagnetic wave beam; the duration of the first carrier without signal modulation is 0 to 5s; the first carrier without signal modulation is called a pilot carrier.

[0076] In an embodiment of the present invention, by setting the input voltage control unit 15 to receive a carrier wave without signal modulation from the outside, and outputting a part of the input voltage according to the electromagnetic wave energy carried by the first carrier wave without signal modulation, an additional part of electric energy can be supplemented in addition to the ambient electromagnetic wave energy, which helps to charge the energy storage unit faster and improve the power supply efficiency.

[0077] Furthermore, the lighting control system may further include an RF input and output port 22 .

[0078] The RF input / output port 22 can be coupled to the antenna module 21 and the input voltage control unit 15 respectively, and the input voltage control unit 15 receives electromagnetic wave energy in the external environment and the first signal-free modulated carrier from the antenna module 21 via the RF input / output port 22 .

[0079] In the embodiment of the present invention, the RF input and output port 22 is provided to serve as an input and output port for electromagnetic wave energy, so as to realize the power supply to the energy storage unit 11 .

[0080] Furthermore, the enable instruction control unit 16 is used to receive an external control instruction, and then compare whether the system ID contained in the external control instruction is consistent with the system ID information of the lighting control system, and / or compare whether the switch ID information contained in the external control instruction is consistent with the ID information of the switch, and when they are consistent, issue an enable instruction to enable the switch.

[0081] Specifically, the lighting control system may be set to be multiple, the system ID may be used to uniquely indicate a lighting control system, such as the current lighting control system, and the switch ID information may be used to uniquely indicate the switch 14 .

[0082] In a specific implementation of the embodiment of the present application, the switch ID information can be recorded using the electronic tags mentioned above, and each electronic tag has a unique electronic code and can be attached to an object to identify the target object.

[0083] In an embodiment of the present invention, after comparing and determining that the switch ID information contained in the external control instruction is consistent with the ID information of the switch, an enable instruction to enable the switch 14 is issued, so that the external control instruction can play a decisive role in whether to control the switch 14 to be turned on, thereby enhancing the controllability of the switch 14.

[0084] Furthermore, the external control instruction may be compatible with the selection instruction of ISO18000-6C.

[0085] Specifically, the existing ISO18000-6C Select instruction may be reused to carry the information of the external control instruction, so as to reduce resource consumption and production cost.

[0086] Further, after issuing an enable instruction to enable the switch, the enable instruction control unit 16 may receive a second signal-free modulated carrier of a preset duration from the outside, and issue an enable instruction to disable the switch 14 when the second signal-free modulated carrier ends.

[0087] Furthermore, the preset duration may be user-defined to increase the flexibility of duration setting. For example, the duration for which the light needs to be on may be used as the preset duration.

[0088] Furthermore, the second carrier without signal modulation may satisfy one or more of the following conditions: the second carrier without signal modulation is an unmodulated electromagnetic wave beam; the duration of the second carrier without signal modulation is 0 to 5s; the second carrier without signal modulation is called a successor carrier.

[0089] In an embodiment of the present invention, the enable instruction control unit 16 receives a second signal-free modulated carrier of a preset duration from the outside, and issues an enable instruction to disable the switch 14 at the end of the second signal-free modulated carrier. This can extend the enable time. Since the switch 14 is controlled to be turned on only when the enable instruction indicates to enable it, extending the enable time is equivalent to extending the lighting time. The extended carrier can increase the charging of the energy storage unit, which helps to prevent the LED lamp 17 from turning off quickly or the brightness is too low.

[0090] Furthermore, when the strength of the second non-signal modulated carrier drops to less than -10dBm, the enable instruction control unit can determine that the second non-signal modulated carrier ends, and execute steps after the carrier ends, such as issuing an enable instruction to disable the switch.

[0091] It should be noted that the carrier strength can be 0-30dBm during transmission. When carrier cutoff is required, it can be stepped down from 0-30dBm to below -10dBm to implicitly indicate the end of the second signal-free modulated carrier of the lighting control system.

[0092] Furthermore, the lighting control system may further include an RF input / output port 22 coupled to the enable command control unit 16 , and the enable command control unit 16 receives an external control command and the second non-signal modulated carrier via the RF input / output port 22 .

[0093] In the embodiment of the present invention, the RF input / output port 22 is set to be used as an input / output port of an enable instruction, so as to input instructions to the switch control unit 13 .

[0094] Furthermore, the external control instruction may be compatible with the UHF RFID protocol.

[0095] Specifically, the external control instruction may be compatible with the existing UHF RFID 18000-6C (also known as EPC Class 1 Gen 2) protocol, and control may be implemented based on an existing UHF RFID reader / writer.

[0096] In the embodiment of the present invention, by setting the external control instruction to be compatible with the UHF RFID protocol, the existing RFID protocol can be reused to implement the functions of the present application, thereby improving the convenience of control.

[0097] Furthermore, the lighting control system may further include a boost unit 23 .

[0098] Among them, the boost unit 23 has a first end that can be coupled to the energy storage unit 11 and a second end that is coupled to the switch 14, and is used to increase the energy storage voltage to the preset energy storage threshold voltage and output it to the switch 14 when the energy storage voltage is lower than the preset energy storage threshold voltage.

[0099] In an embodiment of the present invention, by setting the boost unit 23, when the energy storage voltage is lower than the preset energy storage threshold voltage, the energy storage voltage is increased to the preset energy storage threshold voltage and output to the switch. When the energy storage voltage is low, the energy storage voltage can be increased to a uniform voltage level, which helps to maintain the brightness of the lamp and effectively avoid the brightness change of the lamp.

[0100] Reference Figure 3 , Figure 3 FIG. 1 is a schematic diagram of another lighting control system in an embodiment of the present invention. Figure 3 and Figure 2 The differences are described in detail below.

[0101] Specifically, Figure 2 The input voltage control unit shown may include Figure 3 The charge pump 31 and the power management unit 32 are shown. Figure 2 The enable instruction control unit shown may include Figure 3 The control unit 33 , the modem unit 34 and the storage unit 36 ​​shown may further include an analog-to-digital conversion (ADC) measurement unit 35 .

[0102] Specifically, the antenna module can be connected through the RF input port, and the electromagnetic wave energy in the environment can be received through the antenna module, and then the electromagnetic wave energy can be boosted and rectified into a DC voltage source through the charge pump 31 and the power management unit 32. The output voltage range can be 1.2V~4V. The DC voltage source can be connected through the Avdd port and input into the energy storage unit.

[0103] The RF input / output port can also be an input / output port for radio frequency signals. The modulation and demodulation module 34 can demodulate external control instructions from the RF input / output port or modulate feedback signals to the antenna module through the RF input / output port and send them to the outside by backscattering.

[0104] The GPIO port can be used to enable signal output. After demodulating the enable command from the RF input and output port, the GPIO port can be set high or low according to the command parameters.

[0105] Further, Figure 2 The illustrated voltage detection unit may include a high voltage detection unit 37 and a low voltage detection unit 38 .

[0106] Specifically, the high voltage detection unit 37 can detect the voltage value of the energy storage unit. If the voltage value is greater than the first preset threshold voltage, the output enable control level 1 is output; the low voltage detection unit 38 can detect the voltage value of the energy storage unit. If the voltage value is less than the second preset threshold voltage, the output enable level 2 is output; the first preset threshold voltage and the second preset threshold voltage can be adjusted by adjusting circuit parameters, wherein the first preset threshold voltage is greater than the second preset threshold voltage.

[0107] related Figure 3 For more information and working principle of another lighting control system shown in FIG. Figure 1 to Figure 2 The contents shown are executed and will not be repeated here.

[0108] In an embodiment of the present invention, a control method based on the above-mentioned lighting control system is also disclosed, including: using an energy storage unit to receive the input voltage of the input voltage control unit and storing energy to generate an energy storage voltage, and the first end of the energy storage unit is coupled to the input voltage control unit; using a voltage detection unit to detect the energy storage voltage and output the energy storage voltage detection result; using a switch control unit to receive an enable instruction from an enable instruction control unit, and receiving the energy storage voltage detection result from a voltage detection unit, wherein the first end of the switch control unit is coupled to the enable instruction control unit, and the second end of the switch control unit is coupled to the voltage detection unit; using the switch control unit to control the switch according to the enable instruction and the energy storage voltage detection result, wherein the switch is coupled to one or more lamps to control the turning on and off of the lamps.

[0109] In the embodiment of the present invention, by setting an energy storage unit and a voltage detection unit, the energy storage voltage can be detected, and then the switch can be controlled according to the enable instruction and the energy storage voltage detection result. Compared with the prior art that the light is turned on only according to the external input voltage exceeding the voltage threshold or the external input power exceeding the power threshold, which leads to insufficient and unstable power input, it is easy to cause accidental shutdown or low brightness. By adopting the solution of the embodiment of the present invention, an energy storage unit can be set, and the light can be turned on or off according to its energy storage voltage and the enable instruction, which has the opportunity to improve the power supply stability and effectively avoid the problem of accidental shutdown or low brightness of the light.

[0110] Further, when the enable instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to a first preset threshold voltage, the switch control unit is used to control the switch to be turned on; when the enable instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is less than a second preset threshold voltage, the switch control unit is used to control the switch to be turned off; when the enable instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage, the switch control unit is used to control the switch to maintain a current state; wherein the first preset threshold voltage is greater than the second preset threshold voltage.

[0111] In an embodiment of the present invention, a region where the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage is set as a buffer voltage region, and the switch state is not changed in the buffer voltage region until the voltage is increased or decreased to exceed the buffer voltage region. Then, whether to control the switch to be turned on or off is determined according to the size of the energy storage voltage, which helps to further improve the power supply stability and effectively avoid the problem of the lamp being accidentally turned off or the brightness being too low.

[0112] Furthermore, before using the energy storage unit to receive the input voltage of the input voltage control unit, the control method also includes: using the input voltage control unit to receive electromagnetic wave energy in the external environment from the antenna module, and boosting and rectifying the electromagnetic wave energy to output at least a part of the input voltage; wherein the input voltage control unit is coupled to the antenna module.

[0113] In an embodiment of the present invention, power supply can be achieved based on ambient electromagnetic wave energy without relying on batteries or external power input, which can more effectively meet user needs in working scenarios where wired power supply or battery replacement is not applicable.

[0114] Furthermore, the input voltage control unit is used to receive a first signal-free modulated carrier from the outside, and output a portion of the input voltage according to the electromagnetic wave energy carried by the first signal-free modulated carrier.

[0115] Furthermore, one or more of the following conditions are satisfied: the first carrier wave without signal modulation is an unmodulated electromagnetic wave beam; the duration of the first carrier wave without signal modulation is 0 to 5 seconds; and the first carrier wave without signal modulation is called a pilot carrier.

[0116] In the embodiment of the present invention, in addition to the ambient electromagnetic wave energy, a portion of electric energy can be additionally supplemented, which helps to charge the energy storage unit faster and improve the power supply efficiency.

[0117] Furthermore, the input voltage control unit receives electromagnetic wave energy in the external environment and the first signal-free modulated carrier from the antenna module via an RF input / output port; wherein the RF input / output port is coupled to the antenna module and the input voltage control unit respectively.

[0118] Furthermore, after using the input voltage control unit to receive a first signal-free modulated carrier from the outside, the control method also includes: using the enable instruction control unit to receive an external control instruction, and then comparing whether the system ID contained in the external control instruction is consistent with the system ID information of the lighting control system, and / or comparing whether the switch ID information contained in the external control instruction is consistent with the ID information of the switch, and issuing an enable instruction to enable the switch when they are consistent.

[0119] It should be noted that the above steps may be performed before the switch control unit receives the enable instruction from the enable instruction control unit.

[0120] In the embodiment of the present invention, the external control instruction can play a decisive role in whether to control the switch to be turned on, thereby enhancing the controllability of the switch.

[0121] Furthermore, the external control instruction is compatible with the selection instruction of ISO18000-6C.

[0122] Furthermore, after the enable instruction control unit is used to issue an enable instruction to enable the switch, the control method also includes: using the enable instruction control unit to receive a second signal-free modulated carrier of a preset duration from the outside, and issuing an enable instruction to disable the switch when the second signal-free modulated carrier ends.

[0123] It should be noted that the above steps may be performed before the switch control unit receives the enable instruction from the enable instruction control unit.

[0124] In an embodiment of the present invention, the enabling time can be extended. Since the switch is controlled to be turned on only when the enabling instruction indicates to enable the switch, extending the enabling time is equivalent to extending the lighting time, and the extended carrier can increase the charging of the energy storage unit, which helps to prevent the LED lamp from turning off quickly or the brightness is too low.

[0125] Furthermore, one or more of the following conditions are satisfied: the second carrier wave without signal modulation is an unmodulated electromagnetic wave beam; the duration of the second carrier wave without signal modulation is 0 to 5 s; and the second carrier wave without signal modulation is called a successor carrier.

[0126] Further, when the strength of the second carrier wave modulated without signal drops to less than -10 dBm, the enabling instruction control unit determines that the second carrier wave modulated without signal ends.

[0127] It should be noted that the carrier strength can be 0-30dBm during transmission. When carrier cutoff is required, it can be stepped down from 0-30dBm to below -10dBm to implicitly indicate the end of the second signal-free modulated carrier of the lighting control system.

[0128] Furthermore, the enabling instruction control unit receives an external control instruction and the second carrier without signal modulation via the RF input / output port; wherein the RF input / output port is coupled to the enabling instruction control unit.

[0129] Furthermore, the external control instruction is compatible with the UHF RFID protocol.

[0130] In the embodiment of the present invention, by setting the external control instruction to be compatible with the UHF RFID protocol, the existing RFID protocol can be reused to implement the functions of the present application, thereby improving the convenience of control.

[0131] Furthermore, the control method further includes: when the energy storage voltage is lower than a preset energy storage threshold voltage, using a boost unit to increase the energy storage voltage to the preset energy storage threshold voltage and output it to the switch.

[0132] In the embodiment of the present invention, when the energy storage voltage is low, the energy storage voltage can be increased to a uniform voltage level, which helps to maintain the brightness of the lamp and effectively avoid the light and dark changes of the lamp. Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention shall be based on the scope defined by the claims.

Claims

1. A lighting control system, characterized in that: It includes an energy storage unit, a voltage detection unit, a switch control unit, a switch, an input voltage control unit and an enable instruction control unit: An energy storage unit, a first end of which is coupled to the input voltage control unit, for receiving an input voltage and storing energy to generate an energy storage voltage; A voltage detection unit, used to detect the energy storage voltage and output the energy storage voltage detection result; A switch control unit, a first end of which is coupled to the enable instruction control unit for receiving the enable instruction, and a second end of which is coupled to the voltage detection unit for receiving the energy storage voltage detection result; A switch, coupled to one or more lights, to control the lights to be turned on and off; Wherein, the switch control unit controls the switch according to the enable instruction and the energy storage voltage detection result; Wherein, when the enabling instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to a first preset threshold voltage, the switch control unit controls the switch to be turned on; When the enabling instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is less than a second preset threshold voltage, the switch control unit controls the switch to be disconnected; When the enabling instruction indicates to enable the switch, and the energy storage voltage detection result indicates that the energy storage voltage is greater than or equal to the second preset threshold voltage and less than the first preset threshold voltage, the switch control unit controls the switch to maintain a current state; Wherein, the first preset threshold voltage is greater than the second preset threshold voltage.

2. The lighting control system according to claim 1, characterized in that: The input voltage control unit is coupled to the antenna module, and is used to receive electromagnetic wave energy in an external environment from the antenna module, and boost and rectify the electromagnetic wave energy to output at least a portion of the input voltage.

3. The lighting control system according to claim 2, characterized in that: The input voltage control unit receives a first non-signal modulated carrier from the outside, and outputs a portion of the input voltage according to electromagnetic wave energy carried by the first non-signal modulated carrier.

4. The lighting control system according to claim 3, characterized in that: Meet one or more of the following: The first carrier wave without signal modulation is an unmodulated electromagnetic wave beam; The duration of the first carrier wave without signal modulation is 0-5s; The first carrier without signal modulation is called a pilot carrier.

5. The lighting control system according to claim 3, characterized in that: Also includes: The RF input and output ports are respectively coupled to the antenna module and the input voltage control unit, and the input voltage control unit receives electromagnetic wave energy in an external environment and the first signal-free modulated carrier from the antenna module via the RF input and output ports.

6. The lighting control system according to claim 1, characterized in that: The enable instruction control unit is used to receive an external control instruction, and then compare whether the system ID contained in the external control instruction is consistent with the system ID information of the lighting control system, and / or compare whether the switch ID information contained in the external control instruction is consistent with the ID information of the switch, and when they are consistent, issue an enable instruction to enable the switch.

7. The lighting control system according to claim 6, characterized in that: The external control command is compatible with the selection command of ISO18000-6C.

8. The lighting control system according to claim 6, characterized in that: After issuing an enable instruction to enable the switch, the enable instruction control unit receives a second signal-free modulated carrier of a preset duration from the outside, and issues an enable instruction to disable the switch when the second signal-free modulated carrier ends.

9. The lighting control system according to claim 8, characterized in that: Meet one or more of the following: The second carrier wave without signal modulation is an unmodulated electromagnetic wave beam; The duration of the second carrier without signal modulation is 0-5s; The second carrier without signal modulation is called a subsequent carrier.

10. The lighting control system according to claim 8, characterized in that: When the strength of the second carrier wave modulated without signal drops to less than -10 dBm, the enabling instruction control unit determines that the second carrier wave modulated without signal ends.

11. The lighting control system according to claim 8, characterized in that: Also includes: The RF input / output port is coupled to the enable instruction control unit, and the enable instruction control unit receives an external control instruction and the second carrier without signal modulation via the RF input / output port.

12. The lighting control system according to claim 6, characterized in that: The external control instructions are compatible with the UHF RFID protocol.

13. The lighting control system according to claim 1, characterized in that: Also includes: A boost unit, a first end of which is coupled to the energy storage unit and a second end of which is coupled to the switch, is used to increase the energy storage voltage to the preset energy storage threshold voltage and output it to the switch when the energy storage voltage is lower than the preset energy storage threshold voltage.

14. A control method based on the lighting control system according to any one of claims 1 to 13, characterized in that: include: An energy storage unit is used to receive an input voltage of an input voltage control unit and store energy to generate an energy storage voltage, wherein a first end of the energy storage unit is coupled to the input voltage control unit; Using a voltage detection unit to detect the energy storage voltage and output the energy storage voltage detection result; A switch control unit is used to receive an enable instruction from an enable instruction control unit, and to receive the energy storage voltage detection result from a voltage detection unit, wherein a first end of the switch control unit is coupled to the enable instruction control unit, and a second end of the switch control unit is coupled to the voltage detection unit; The switch control unit is used to control the switch according to the enabling instruction and the energy storage voltage detection result, wherein the switch is coupled to one or more lamps to control the turning on and off of the lamps.

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