Illumination system, method, computer readable storage medium, and program product

Abstract

The invention relates to a lighting system, a lighting method, a computer readable storage medium and a program product. The lighting system comprises a semiconductor light source, a light source module and a control module, the constant-current driving circuit is used for providing substantially constant driving current for the semiconductor light source; and the voltage supply circuit provides voltage for the constant-current driving circuit, and the voltage supply circuit is configured in a way that the voltage provided by the voltage supply circuit for the constant-current driving circuit drops from a first voltage value to a second voltage value within a voltage regulation temperature range in which a first temperature value rises to a second temperature value.

Description

Technical Field

[0001] The present application relates to lighting systems, methods, computer-readable storage media, and program products. Background Art

[0002] Semiconductor light sources, such as LEDs (light-emitting diodes), are commonly used in lighting systems. In order to meet market demands, such as the increasingly diverse demands for flowing water animation effects in car lights, LED car lights have gradually adopted linear driver chips, also known as linear chips, linear drivers, etc., in recent years to drive LEDs.

[0003] The meaning of linear drive, as the name suggests, is to achieve constant current regulation through a linear regulator, without high-frequency switching action, to provide constant current when the LED lamp is working.

[0004] However, the inventors have found in practice that the efficiency of the lighting system using linear chips needs to be further improved.

[0005] Therefore, the art needs a lighting system, method, computer-readable storage medium and program product to solve the above technical problems. Summary of the invention

[0006] The technical problem to be solved by the present application is to further improve the efficiency of the lighting system on the basis of driving the semiconductor light source through a constant current driving circuit.

[0007] According to the first aspect of the present application, a lighting system includes: a semiconductor light source; a constant current drive circuit, which provides a substantially constant drive current to the semiconductor light source; and a voltage supply circuit, which provides a voltage to the constant current drive circuit, wherein the voltage supply circuit is configured such that: within a voltage regulation temperature range from a first temperature value to a second temperature value, the voltage provided by the voltage supply circuit to the constant current drive circuit decreases from a first voltage value to a second voltage value.

[0008] The lighting system described above realizes further improvement of the efficiency of the lighting system on the basis of driving the semiconductor light source through the constant current driving circuit. The principle is that the inventor found that the main reason affecting the efficiency of the lighting system is that the existing lighting system using linear chips is usually powered by a constant voltage power supply. In order to ensure the stable output of the lighting system under working conditions, for example, for car lights, considering the stable output of the full temperature range under the driving conditions of the car, the constant voltage power supply voltage will be designed according to the LED voltage drop at a low temperature of -40°C. However, in a high temperature working environment, the voltage drop of the LED is small, and the remaining power supply voltage will be loaded on the linear power supply channel, resulting in a sharp increase in the heat loss of the linear chip and reducing the overall working efficiency of the loop. The voltage supply circuit is within the voltage regulation temperature range from the first temperature value to the second temperature value, and the voltage provided by the voltage supply circuit to the constant current driving circuit is reduced from the first voltage value to the second voltage value, which can reduce the heat loss generated by the LED linear driving chip itself, thereby improving the thermal environment of the LED car light and extending the service life of the lamp.

[0009] In one or more embodiments of the lighting system, the constant current driving circuit is a linear driving circuit.

[0010] In one or more embodiments of the lighting system, in a temperature range below the first temperature value, the voltage provided by the voltage supply circuit to the constant current drive circuit is a substantially constant first voltage value, and in a temperature range above the second temperature value, the voltage provided by the voltage supply circuit to the constant current drive circuit is a substantially constant second voltage value.

[0011] In one or more embodiments of the lighting system, the lighting system further includes a temperature sensing element, wherein the temperature sensing element is integrally arranged with the semiconductor light source, the first temperature value is a temperature value range of -20°C to 25°C sensed by the temperature sensing element, and the second temperature value is a temperature value range of 45°C to 90°C sensed by the temperature sensing element.

[0012] In one or more embodiments of the lighting system, within a voltage regulation temperature range from a first temperature value to a second temperature value, the voltage provided by the voltage supply circuit to the constant current driving circuit smoothly drops from a first voltage value to a second voltage value.

[0013] In one or more embodiments of the lighting system, within a voltage regulation temperature range from a first temperature value to a second temperature value, the voltage provided by the voltage supply circuit to the constant current driving circuit decreases in steps from a first voltage value to a second voltage value, and decreases by a predetermined voltage value within each predetermined temperature range, and maintains the voltage substantially constant within each predetermined temperature range.

[0014] In one or more embodiments of the lighting system, a control unit is further included, which is electrically connected to the voltage supply circuit, and the control unit includes: a memory for storing instructions executable by a processor; a processor for executing the instructions to achieve: within the voltage regulation temperature range from the first temperature value to the second temperature value, the voltage provided by the voltage supply circuit to the constant current drive circuit decreases from a first voltage value to a second voltage value.

[0015] A lighting method according to the second aspect of the present application is applicable to a lighting system, which includes: a semiconductor light source; a constant current drive circuit, which provides a substantially constant drive current to the semiconductor light source; and a voltage supply circuit, which provides a voltage to the constant current drive circuit. The lighting method includes: within a voltage regulation temperature range from a first temperature value to a second temperature value, the voltage provided by the voltage supply circuit to the constant current drive circuit decreases from a first voltage value to a second voltage value.

[0016] According to a third aspect of the present application, a computer-readable storage medium has a computer program thereon, and the program is executed by a processor to implement the lighting method as described in the second aspect.

[0017] A computer program product according to a fourth aspect of the present application comprises a computer program, which implements the lighting method as described in the second aspect when executed by a processor.

[0018] The lighting method, computer-readable storage medium, and computer program product introduced above achieve further improvement in the efficiency of the lighting system based on driving the semiconductor light source through a constant current driving circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a schematic block diagram of the structure of a lighting system according to an embodiment of the present application.

[0021] Figure 2 Schematic diagram of voltage drop in a voltage supply circuit of a lighting system according to an embodiment of the present application.

[0022] Figure 3 Schematic diagram of voltage drop in a voltage supply circuit of a lighting system according to another embodiment of the present application.

[0023] Reference numerals:

[0024] 10- Lighting system

[0025] 1-Semiconductor light source

[0026] 11-Semiconductor light emitting element

[0027] 2-Constant current drive circuit

[0028] 20-Linear drive circuit

[0029] 3-Voltage supply circuit

[0030] 31-DC / DC Converter

[0031] 4-Temperature sensing element

[0032] 5-Control Unit

[0033] 51-Memory

[0034] 52-Controller

[0035] 6-CAN bus transceiver. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0037] The following description is given to enable those skilled in the art to implement and use the invention and incorporate it into a specific application context. Various modifications, as well as various uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Thus, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0038] In the following detailed description, many specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the practice of the present invention need not be limited to these specific details. In other words, known structures and devices are shown in block diagram form without detailed display to avoid obscuring the present invention.

[0039] Note that, where used, the symbols left, right, front, back, top, bottom, forward, reverse, clockwise and counterclockwise are used only for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or direction between the various parts of the object. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be understood as indicating or implying relative importance.

[0040] Note that, in the case of use, further, preferably, further and more preferably are simple beginnings for explaining another embodiment based on the previous embodiment, and the content of further, preferably, further or more preferably followed by the above embodiment is combined with the previous embodiment as a complete composition of another embodiment. Several further, preferably, further or more preferably settings followed by the same embodiment can be arbitrarily combined to form another embodiment.

[0041] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0042] As described above, the efficiency of the existing linear drive LED lighting system needs to be further improved.

[0043] After in-depth research, the inventors found that the main reason for the above problems is that the existing lighting systems using linear chips are usually powered by constant voltage power supplies. In order to ensure the stable output of the lighting system under working conditions, for example, for car lights, considering the stable output over the full temperature range under car driving conditions, the constant voltage power supply voltage will be designed according to the LED voltage drop at a low temperature of -40°C. However, in a high-temperature working environment, the voltage drop of the LED is small, and the remaining power supply voltage will be loaded on the linear power supply channel, resulting in a sharp increase in the heat loss of the linear chip and a reduction in the overall working efficiency of the circuit.

[0044] Based on the above findings, the inventors have conducted in-depth research and proposed a new lighting system, method, computer-readable storage medium and program product. By reducing the voltage provided by the voltage supply circuit to the constant current drive circuit from a first voltage value to a second voltage value within a voltage regulation temperature range from a first temperature value to a second temperature value, the heat loss generated by the LED linear drive chip itself can be reduced, thereby improving the thermal environment of the LED car lamp and extending the service life of the lamp.

[0045] The lighting system 10 introduced in the following embodiment can be applied to vehicles to achieve further improvement in the efficiency of the lighting system based on driving the semiconductor light source through a constant current drive circuit to adapt to various working conditions and installation positions of the vehicle, but is not limited to this. For example, it can be applied to other application scenarios of transportation vehicles, such as railway trains, ships, and airplanes. As long as it is a transportation vehicle or even a lighting system in a fixed place, as long as it needs to improve the efficiency of the lighting system based on driving the semiconductor light source through a constant current drive circuit, the lighting system 10 disclosed in the embodiment of the present application can be applied.

[0046] refer to Figure 1As shown, in some embodiments, the lighting system 10 may include a semiconductor light source 1 , a constant current driving circuit 2 , and a voltage supply circuit 3 .

[0047] Among them, the semiconductor light source 1. The semiconductor light source 1 may include one or a plurality of semiconductor light-emitting elements 11 connected in series and / or in parallel. The semiconductor light-emitting element 11 is generally an LED (light-emitting diode), but is not limited thereto. For example, when the lighting system 10 is applied to a vehicle as a vehicle lamp, the lighting system 10 may be a headlight, a taillight, etc. of the vehicle.

[0048] The constant current driving circuit 2 provides a substantially constant driving current to the semiconductor light source 1. The substantially constant here means that the constant current driving circuit 2 can provide a substantially constant predetermined operating current to the semiconductor light emitting element 11, and does not limit the constant current driving circuit 2 to only provide a unique current value. For example, for semiconductor light emitting elements 11 of different powers, the constant current driving circuit 2 can provide different constant operating currents. According to the characteristics of the semiconductor light emitting element 11, a constant current is provided, that is, the operating brightness of the semiconductor light emitting element 11 remains substantially unchanged. The working principle of the driving circuit driving the semiconductor light emitting element 11, such as an LED, is similar to the conventional driving principle in the field and will not be repeated here.

[0049] It can be understood that the constant current drive circuit 2 here can be a linear drive circuit 20, that is, it can be in the form of "linear drive chip", "linear chip", "linear driver" and the like mentioned above. The specific product model can be TLD7002-16ES of Infineon Technologies. The specific product model given here is only an example. Those skilled in the art can choose a suitable linear drive chip according to actual needs. It can be understood that the interpretation scope of the linear drive circuit 20 introduced here does not include nonlinear drive circuits in the art, nor does it include LED matrix managers known in the art. Figure 1 As shown, the constant current driving circuit 2 may have multiple channels, and the semiconductor light emitting elements 11 (LED lamp beads) of each channel are independently controlled and driven.

[0050] The voltage supply circuit 3 provides voltage to the constant current drive circuit 2. Specifically, the voltage supply circuit 3 can be from a voltage source (not shown, for example, an 800V high voltage power supply of a vehicle, or a 12V low voltage power supply, but not limited thereto), and outputs voltage to the constant current drive circuit 2 through a DC / DC converter 31 to supply power.

[0051] The DC / DC converter 31, which can also be called a DC power converter, outputs a DC power supply, and the output voltage value can be changed with the command signal of the control unit 5. The specific form of the DC / DC converter 31 can be a switching power supply chip, which refers to using the energy storage characteristics of capacitors and inductors to perform high-frequency switching through a controllable switch (MOSFET, etc.), and store the input electrical energy in the capacitor (or inductor). When the switch is disconnected, the electrical energy is released to the load to provide energy. The power or voltage output capacity is related to the duty cycle (the ratio of the switch conduction time to the entire switch cycle). The switching power supply can be used for boosting and bucking.

[0052] refer to Figures 1 to 3 As shown, the voltage supply circuit 3 is configured as follows: within the voltage regulation temperature range from the first temperature value T1 to the second temperature value T2, the voltage provided by the voltage supply circuit 3 to the constant current driving circuit 2 decreases from the first voltage value V1 to the second voltage value V2.

[0053] Understandable, continue to refer to Figure 1 As shown, in some embodiments, the specific structure for implementing the regulation of the voltage supply circuit 3 may be that the lighting system 10 further includes a control unit 5, the control unit 5 is electrically connected to the voltage supply circuit 3, and the control unit 5 includes: a memory 51, for storing instructions executable by a processor; a processor 52, for executing instructions to implement: the voltage supply circuit 3 is within the voltage regulation temperature range from the first temperature value T1 to the second temperature value T2, and the voltage provided by the voltage supply circuit 3 to the constant current drive circuit 2 decreases from the first voltage value V1 to the second voltage value V2.

[0054] The electrical connections here are Figure 1 As shown, it generally refers to a wired connection through a wiring harness, but the possibility of connection in the form of a wireless connection is not excluded.

[0055] For example, reference Figure 1 As shown, the control unit 5 can be electrically connected to the constant current driving circuit 2 , and specifically, the control unit 5 can realize communication interaction between the controller and the linear chip through the transceiver 6 of the CAN bus.

[0056] The specific form of the control unit 5, in some embodiments, for example, can be a micro-control unit (Micro-Control Unit, MCU), which has a meaning similar to the general meaning in the art. For example, a common MCU is in the form of a single-chip microcomputer, which appropriately reduces the frequency and specifications of the central processing unit (CPU), and integrates the memory, counter, and peripheral interfaces such as USB, A / D conversion, UART, PLC, DMA, etc. on a single chip to form a chip-level computer, which performs different combination controls for different application scenarios.

[0057] It should be noted that the above-mentioned memory, processor, and database are not limited to a specific memory, processor, or database. For example, in some cases, both the memory and the processor may have a distributed structure, for example, they may include a memory and a processor located at the device end (such as the vehicle end) and the background cloud, respectively, and the device end (such as the vehicle end) and the background cloud jointly implement the above-mentioned lighting method. For another example, the memory and processor of the control unit 5 may be integrated into the body control module (Body Control Module, BCM) of the vehicle, or the domain controller module, or may be integrated into the control module of the lighting system at a specific location, such as the rear lamp control module (Rear Lamp Control Module, RLCM), etc., without being limited thereto. Furthermore, in an embodiment adopting a distributed structure, each step may adjust the specific execution terminal according to the actual situation, and the specific scheme of each step implemented at a specific terminal should not limit the scope of protection of this application.

[0058] The specific values ​​of the first temperature value T1, the second temperature value T2, the first voltage value V1, and the second voltage value V2 here can be adjusted according to actual conditions on the basis of ensuring the lighting effect and system efficiency. In some embodiments, the means for obtaining the first temperature value T1 and the second temperature value T2 may be that the lighting system 10 also includes a temperature sensing element 4. The first temperature value T1 is a temperature value ranging from -20°C to 25°C sensed by the temperature sensing element 4, and the second temperature value T2 is a temperature value ranging from 45°C to 90°C sensed by the temperature sensing element 4. The temperature sensing element 4 is integrated with the semiconductor light source 1. For example, the temperature sensing element 4 may be an NTC (negative temperature coefficient thermistor) temperature sensor. The temperature sensing element 4 and the multiple semiconductor light-emitting elements 11 included in the semiconductor light source 1 described above are integrated into the same printed circuit board 40. The temperature value sensed by the temperature sensing element 4 refers to the temperature near the temperature sensing element 4, which may be equivalent to the temperature of the printed circuit board. Reference Figure 1 As shown, the temperature sensing element 4 may report the real-time collected temperature of the LED light-emitting element to the I / O port of the constant current driving circuit 2, and the linear chip reports the working state of the LED light-emitting element including the ambient temperature to the control unit 5 through the Sub-CAN. The control unit 5 controls the voltage output of the DC / DC converter 31 according to the information fed back by the constant current driving circuit 2. When the temperature of the LED light-emitting element is detected to increase, the control unit 5 recognizes that the forward voltage of the LED light-emitting unit will decrease, and reduces the DC supply voltage at the same time.

[0059] It can be understood that the temperature value sensed by the temperature sensing element 4 is not equal to the ambient temperature of the lighting system 10. For example, the electronic components on the printed circuit board may generate heat, which is higher than the ambient temperature of the lighting system 10. For example, the lighting system 10 may be set on the side of the engine in the front cabin of the vehicle, and the ambient temperature of the lighting system 10 is higher. This is not a limitation. The first temperature value T1 is a temperature value range of -20°C to 25°C sensed by the temperature sensing element 4, and the second temperature value T2 is a temperature value range of 45°C to 90°C sensed by the temperature sensing element 4, which can meet the stable output of the full temperature range under the driving condition of the LED car. The inventor has found that the effect of the deviation from the reference voltage above 225°C is more obvious (that is, the forward voltage of the LED lamp bead mentioned above decreases with the increase of temperature). Therefore, the above temperature range is adopted to further optimize the reduction of the heat loss generated by the LED linear driver chip itself, thereby improving the thermal environment of the LED car light and extending the service life of the lamp. It can be understood that the first voltage value V1 drops to the second voltage value V2, and the second voltage value V2 should meet the minimum voltage required by the lighting system for the brightness of the semiconductor light source. Specifically, for example, for the first voltage value V1, it can generally be a voltage that satisfies stable output under low temperature conditions, for example, it is designed according to the LED voltage drop at a low temperature of -40°C. Assuming that the first voltage value of the LED light-emitting element provided to each channel after loss is 5V, then the second voltage value V2 also needs to meet the voltage value of stable output under high temperature conditions. The specific value varies according to different models and specific requirements, but it must be less than the first voltage value V1.

[0060] Continue to refer Figures 1 to 3 As shown, in the temperature range below the first temperature value T1, the voltage provided by the voltage supply circuit 3 to the constant current driving circuit 2 is a substantially constant first voltage value V1, and in the temperature range above the second temperature value T2, the voltage provided by the voltage supply circuit 3 to the constant current driving circuit 2 is a substantially constant second voltage value V2. The beneficial effect of this is that the control can be simplified and the control complexity can be reduced, thereby simplifying the circuit structure, reducing costs, and ensuring the reliability of the system. It can be understood that the lower limit and upper limit corresponding to the temperature below the first temperature value T1 and above the second temperature value T2 are generally determined by the extreme operating temperature of the lighting system 10. At temperatures outside the extreme operating temperature, the lighting system 10 may have a power-off protection mechanism.

[0061] refer to Figure 2 As shown, in some embodiments, the voltage provided by the voltage supply circuit 3 to the constant current driving circuit 2 may be dropped from the first voltage value V1 to the second voltage value V2 in a smooth manner, for example Figure 2 As shown, it decreases linearly, and the slope of the decrease is (V2-V1) / (T2-T1).

[0062] refer to Figure 3 As shown, in some embodiments, the voltage provided by the voltage supply circuit 3 to the constant current driving circuit 2 can be reduced from the first voltage value V1 to the second voltage value V2 in a step-by-step manner, and can be reduced by a predetermined voltage value within each predetermined temperature range, and the voltage can be kept substantially constant within each predetermined temperature range. Specifically, reference can be made to Figure 3 As shown, the horizontal axis is the temperature value sensed by the temperature sensing element 4. The vertical axis is the voltage, which is the output voltage of the DC / DC converter. The step-by-step temperature reduction corresponding to the voltage reduction is easier to implement within the software. For example, as shown in the figure, it can be divided into different temperature ranges and output according to different voltage values. The software does not need to dynamically adjust the voltage response to the temperature in real time, thereby reducing the software operation requirements. Dynamic adjustment is performed at 0.1V / step every 10 degrees. The inventors have found that the step-down scheme not only increases the energy utilization rate, but also increases the chip utilization efficiency. For example, the thermal power consumption capacity of each chip (constant current drive circuit 2) is generally 1.5W, which varies slightly depending on the environment of different lamps. This scheme breaks through the premise that the chip pins are limited by thermal power consumption, greatly increasing the chip utilization rate by 30%. It can be understood that Figure 3 The values ​​of the vertical and horizontal axes are only examples and do not constitute a limitation on the protection scope of this application.

[0063] Based on the above introduction, in some embodiments, the present application also provides a lighting method for a lighting system, which lighting system includes: a semiconductor light source 1; a constant current driving circuit 2, which provides a substantially constant driving current to the semiconductor light source 1; a voltage supply circuit 3, which provides a voltage to the constant current driving circuit 2, and the lighting method includes: the voltage supply circuit 3 is within a voltage regulation temperature range from a first temperature value T1 to a second temperature value T2, and the voltage provided by the voltage supply circuit 3 to the constant current driving circuit 2 decreases from a first voltage value V1 to a second voltage value V2.

[0064] Another aspect of the present application further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the steps of the lighting method described in the above embodiment are implemented. Please refer to the above description for details, which will not be repeated here.

[0065] Another aspect of the present application provides a computer program product, including a computer program, which implements the lighting method described in the above embodiments when executed by a processor.

[0066] In addition, it can be understood that the above-mentioned computer-readable storage medium can also be in a system form, that is, it includes multiple computer-readable storage sub-media, so as to jointly implement the steps of the lighting method described above through multiple computer-readable storage media.

[0067] In summary, the beneficial effects of the lighting system, method, computer-readable storage medium and program product described in the above embodiments include but are not limited to achieving further improvement in the efficiency of the lighting system on the basis of driving the semiconductor light source through a constant current drive circuit. The principle is that the inventor found that the main reason affecting the efficiency of the lighting system is that the existing lighting system using linear chips is usually powered by a constant voltage power supply. In order to ensure the stable output of the lighting system under working conditions, for example, for car lights, considering the stable output over the full temperature range under the driving conditions of the car, the constant voltage power supply voltage will be designed according to the LED voltage drop at a low temperature of -40°C (the temperature of the temperature sensor). However, in a high temperature working environment, the voltage drop of the LED is small, and the remaining power supply voltage will be loaded on the linear power supply channel, resulting in a sharp increase in the heat loss of the linear chip and reducing the overall working efficiency of the loop. The voltage supply circuit provides a voltage drop from the first voltage value to the second voltage value within the voltage regulation temperature range from the first temperature value to the second temperature value, which can reduce the heat loss generated by the LED linear driver chip itself, thereby improving the thermal environment of the LED car light and extending the service life of the lamp.

[0068] The various illustrative logic modules and circuits described in conjunction with the embodiments disclosed herein may be implemented or executed with a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in cooperation with a DSP core, or any other such configuration.

[0069] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software module may reside in a RAM memory, a flash memory, a ROM memory, an EPROM memory, an EEPROM memory, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to a processor so that the processor can read and write information from / to the storage medium. In an alternative, a storage medium may be integrated into a processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components.

[0070] In one or more exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented as a computer program product in software, each function may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Computer-readable media include both computer storage media and communication media, including any media that facilitates the transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a computer. As an example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer. Any connection is also properly referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwaves, the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwaves are included in the definition of the medium. Disk and disc as used herein include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disk often reproduces data magnetically, while disc reproduces data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

[0071] Although the present application is disclosed as above with preferred implementation modes, it is not intended to limit the present application. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above implementation modes according to the technical essence of the present application without departing from the content of the technical solution of the present application shall fall within the protection scope defined by the claims of the present application.

Claims

1. A lighting system (10), characterized in that: include: Semiconductor light source (1); A constant current driving circuit (2) for providing a substantially constant driving current to the semiconductor light source (1); A voltage supply circuit (3) is used to provide voltage to the constant current drive circuit (2), and the voltage supply circuit (3) is configured as follows: Within a voltage regulation temperature range in which a first temperature value (T1) rises to a second temperature value (T2), the voltage provided by the voltage supply circuit (3) to the constant current drive circuit (2) decreases from a first voltage value (V1) to a second voltage value (V2).

2. The lighting system (10) according to claim 1, characterized in that The constant current driving circuit (2) is a linear driving circuit (20).

3. The lighting system (10) according to claim 1, characterized in that In a temperature range below the first temperature value (T1), the voltage provided by the voltage supply circuit (3) to the constant current drive circuit (2) is a substantially constant first voltage value (V1); in a temperature range above the second temperature value (T2), the voltage provided by the voltage supply circuit (3) to the constant current drive circuit (2) is a substantially constant second voltage value (V2).

4. The lighting system (10) according to claim 1, characterized in that The lighting system (10) further comprises a temperature sensing element (4), wherein the temperature sensing element (4) is integrally arranged with the semiconductor light source (1), the first temperature value (T1) is a temperature value in the range of -20°C to 25°C sensed by the temperature sensing element (4), and the second temperature value (T2) is a temperature value in the range of 45°C to 90°C sensed by the temperature sensing element (4).

5. The lighting system (10) according to claim 1, characterized in that Within a voltage regulation temperature range from a first temperature value (T1) to a second temperature value (T2), the voltage supplied by the voltage supply circuit (3) to the constant current drive circuit (2) smoothly decreases from a first voltage value (V1) to a second voltage value (V2).

6. The lighting system (10) according to claim 1, characterized in that The voltage supply circuit (3) provides a voltage to the constant current drive circuit (2) which decreases from a first voltage value (V1) to a second voltage value (V2) in a step-wise manner within a voltage regulation temperature range from a first temperature value (T1) to a second temperature value (T2), and decreases the voltage by a predetermined value within each predetermined temperature range, and maintains the voltage substantially constant within each predetermined temperature range.

7. The lighting system (10) according to claim 1, characterized in that It also includes a control unit (5), the control unit (5) is electrically connected to the voltage supply circuit (3), and the control unit (5) includes: A memory (51) for storing instructions executable by a processor; A processor (52) is configured to execute the instructions to implement: Within a voltage regulation temperature range in which a first temperature value (T1) rises to a second temperature value (T2), the voltage provided by the voltage supply circuit (3) to the constant current drive circuit (2) decreases from a first voltage value (V1) to a second voltage value (V2).

8. A lighting method, characterized in that: Applicable to a lighting system, the lighting system comprising: a semiconductor light source (1); a constant current drive circuit (2) for providing a substantially constant drive current to the semiconductor light source (1); and a voltage supply circuit (3) for providing a voltage to the constant current drive circuit (2). The lighting method comprises: Within a voltage regulation temperature range in which a first temperature value (T1) rises to a second temperature value (T2), the voltage provided by the voltage supply circuit (3) to the constant current drive circuit (2) decreases from a first voltage value (V1) to a second voltage value (V2).

9. A computer-readable storage medium having a computer program thereon, characterized in that: The program is executed by a processor to implement the lighting method according to claim 8.

10. A computer program product, comprising a computer program, which implements the lighting method according to claim 8 when executed by a processor.

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