CN111343766A - Lighting device and lighting control method - Google Patents
Lighting device and lighting control method Download PDFInfo
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- CN111343766A CN111343766A CN202010230880.7A CN202010230880A CN111343766A CN 111343766 A CN111343766 A CN 111343766A CN 202010230880 A CN202010230880 A CN 202010230880A CN 111343766 A CN111343766 A CN 111343766A
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Abstract
The invention provides a lighting device and a lighting control method, which are applied to the technical field of electronics. The light intensity value of the light ray collected by the light intensity value collecting module after passing through the light guide structure in the lighting device is changed in brightness by adjusting the output current of the adjustable constant current source until the obtained current intensity value is within the preset range if the light guide structure is aged, so that the influence of the aging of the light guide structure on the lighting effect is counteracted.
Description
Technical Field
The invention belongs to the technical field of electronics, and particularly relates to an illumination device and an illumination control method.
Background
In most application scenarios, the lighting device is required to provide stable lighting. For example, in the field of automobiles, an on-board reading lamp disposed at the overhead position of a driver or a passenger is mainly used for illuminating a reading area in the automobile, and if the brightness of the on-board reading lamp changes significantly, the use feeling of the driver or the passenger is seriously affected.
In practical use, most of the lighting devices are provided with light guide structures, and the light guide structures change the propagation path of light rays emitted by the light source and converge the light rays so as to achieve the purpose of improving the lighting effect. However, as the service life of the lighting device is prolonged, the light guide structure inevitably ages, so that the light adjusting effect and the light transmittance are obviously reduced, and the brightness of the lighting device is obviously changed, thereby affecting the lighting effect.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an illumination device and an illumination control method, in which an adjustable constant current source circuit is used to drive a light source, and the luminance of the light source is adjusted by adjusting an output current, so as to counteract the influence of the aging of a light guide structure on an illumination effect, and the specific scheme is as follows:
in a first aspect, the present invention provides a lighting device comprising: a light source, an adjustable constant current source circuit, a light guide structure, a light intensity value acquisition module and a controller, wherein,
the output end of the adjustable constant current source circuit is connected with the light source;
the light guide structure is arranged in the light irradiation direction of the light source;
the light intensity value acquisition module acquires the current intensity value of the light passing through the light guide structure;
the controller is respectively connected with the control end of the adjustable constant current source circuit and the output end of the light intensity value acquisition module, and the controller is used for adjusting the output current of the adjustable constant current source circuit according to the current intensity value until the current intensity value is within a preset range.
Optionally, the light guiding structure is provided with a light reflecting body, wherein,
the light reflecting body is arranged corresponding to the light intensity value acquisition module and used for reflecting light rays which are in a preset proportion and pass through the light guide structure to the light intensity value acquisition module.
Optionally, the light reflector includes a light reflecting coating disposed on the surface of the light guide structure.
Optionally, the light intensity value collecting module includes a photoelectric sensor.
Optionally, the light source includes at least one LED lamp bead.
Optionally, the light source includes at least one patch LED.
In a second aspect, the present invention provides a lighting control method applied to the lighting device according to any one of the first aspect of the present invention, the method including:
obtaining the current intensity value of light rays passing through a light guide structure of the lighting device;
judging whether the current intensity value is within a preset range;
and if the current intensity value is not in the preset range, adjusting the output current of an adjustable constant current source circuit in the lighting device until the current intensity value is in the preset range.
Optionally, if a light intensity value collection module in the lighting device is a photoelectric sensor, obtaining a current intensity value of light passing through a light guide structure of the lighting device includes:
acquiring a current voltage value fed back by the photoelectric sensor;
and determining a light intensity value corresponding to the current voltage value according to a preset mapping relation to obtain a current intensity value corresponding to the light passing through a light guide structure of the lighting device, wherein the preset mapping relation records a corresponding relation between the voltage value of the photoelectric sensor and the light intensity value.
Optionally, if the light guide structure is provided with a reflector, acquiring the current voltage value fed back by the photoelectric sensor includes:
acquiring a voltage value fed back by the photoelectric sensor and a light intensity value reflection ratio of the reflector;
and taking the quotient of the voltage value fed back by the photoelectric sensor and the reflection ratio of the light intensity value as the current voltage value fed back by the photoelectric sensor.
Optionally, the adjusting the output current of the adjustable constant current source circuit in the lighting device includes:
adjusting the duty ratio of the PWM signal to obtain an adjusted PWM signal;
and sending the regulated PWM signal to an adjustable constant current source circuit in the lighting device so that the adjustable constant current source circuit outputs current according to the regulated PWM signal.
In the lighting device provided by the invention, the output end of the adjustable constant current source circuit is connected with the light source to drive the light source to emit light, the light guide structure is arranged in the light irradiation direction of the light source to guide and gather light, meanwhile, the light intensity value acquisition module acquires the current intensity value of the light passing through the light guide structure, the controller is respectively connected with the control end of the adjustable constant current source circuit and the output end of the light intensity value acquisition module, and adjusts the output current of the adjustable constant current source circuit according to the acquired current intensity value until the current intensity value is within the preset range. In the lighting device provided by the invention, the current intensity value of the light which is acquired by the light intensity value acquisition module and passes through the light guide structure is the intensity value of the light which is actually irradiated into the lighting area, and is also a direct representation of the lighting effect which is actually experienced by a user of the lighting device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an illumination device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another lighting device provided in the embodiment of the present invention;
fig. 3 is a flowchart of a lighting control method according to an embodiment of the present invention;
fig. 4 is a block diagram of a lighting control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Optionally, referring to fig. 1, fig. 1 is a schematic structural diagram of a lighting device according to an embodiment of the present invention, and as shown in fig. 1, the lighting device according to the embodiment of the present invention may include:
a light source 10, an adjustable constant current source circuit 20, a light guide structure 30, a light intensity value collecting module 40, and a controller (not shown in the figure), wherein,
the type of the light source 10 may vary according to the specific application scenario of the lighting device, and in most cases, the higher the lighting quality requirement, the more stringent the type selection requirement of the light source 10 will be. The luminous intensity of the light source 10, the service life, the rated loss, whether heat is generated during the operation, and the like need to be comprehensively considered. The specific type of the light source 10 can be selected by combining the technical parameters of the light source in the prior art and the specific application scenario, and will not be described in detail here.
Alternatively, when the lighting device is applied to a vehicle and used as an in-vehicle reading lamp, an LED light source may be preferable in order to improve the safety of the vehicle. Because the LED light source belongs to the cold light source, can not produce the heat in the course of the work, the possibility of taking place the conflagration is lower, and further, LED light source light intensity value is higher, and self stability is better moreover, can appear the change of neglecting and neglecting seldom.
Correspondingly, when the model is specifically selected, one or more LED lamp beads can be selected as the lighting source by combining the specific design structure of the lighting device and the space in the vehicle, and one or more surface-mounted LEDs can also be selected as the lighting source, so that the invention also belongs to the protection scope of the invention on the premise of not exceeding the core thought scope of the invention.
The output end of the adjustable constant current source circuit 20 is connected to the light source 10, and the adjustable constant current source circuit 20 is used for providing a working current for the light source 10 to drive the light source 10 to emit light. The embodiment of the present invention selects the adjustable constant current source circuit 20 to drive the light source 10, mainly considering that the output current of the adjustable constant current source circuit is not affected by the voltage fluctuation of the power supply system, and can be adjusted as required, and particularly, the output current is stabilized at the corresponding required current value, so as to ensure that the light source 10 can stably work, which is the key point for solving the corresponding technical problem.
Particularly, when the lighting device provided by the embodiment of the invention is applied to a vehicle and used as an interior lighting lamp, the voltage fluctuation range of the vehicle-mounted power supply system is large and frequent, and the adjustable constant current source circuit is used, so that the defect of the vehicle-mounted power supply system can be effectively overcome, and the influence of the voltage fluctuation of the vehicle-mounted power supply system is avoided.
The light guide structure 30 is mainly used for changing or constraining the propagation path of the light emitted by the light source 10, converging the light, ensuring the same or similar illumination brightness in a preset illumination area, and avoiding light divergence or over concentration. Based on the basic function of the light guide structure 30, the light guide structure 30 is disposed in the light irradiation direction of the light source 10, so as to guide the light emitted from the light source 10, thereby achieving the aforementioned purpose.
The light intensity value collecting module 40 can collect the light intensity value of the light. In the illumination device provided in the embodiment of the present invention, because the aging condition of the light guide structure 30 needs to be checked, and the aging degree of the light guide structure 30 directly affects the light intensity value of the light passing through the light guide structure 30, a specific current intensity value of the light passing through the light guide structure 30 needs to be obtained.
The controller is connected with the control end of the adjustable constant current source circuit 20 and the output end of the light intensity value acquisition module 40, specifically, the controller receives the current intensity value of the light fed back by the light intensity value acquisition module 40 after passing through the light guide structure 30, and further, the controller can send a control signal to the control end of the adjustable constant current source circuit 20 to control the output current of the adjustable constant current source circuit 20. In the embodiment of the present invention, the controller specifically adjusts the output current of the adjustable constant current source circuit 20 according to the current intensity value fed back by the light intensity value acquisition module 40 until the current intensity value is within the preset range.
As mentioned above, in most application scenarios, the lighting device is required to provide stable lighting, and accordingly, the controller of the lighting device may pre-store a preset range of the light intensity value at the beginning of the design of the lighting device, and as long as the light intensity value of the light actually emitted from the lighting device into the lighting area is within the preset range, the lighting of the lighting device can be determined to be stable. Based on this, in the lighting device provided in the embodiment of the present invention, if the current intensity value is not within the preset range, the controller adjusts the output current of the adjustable constant current source circuit 20 until the light intensity value of the lighting device irradiated into the lighting area is within the preset range, and stops the adjustment.
Specifically, if the current intensity value is greater than the upper limit value of the preset range, the output current of the adjustable constant current source circuit 20 is reduced; conversely, if the aforementioned present intensity value is smaller than the lower limit value of the preset range, the output current of the adjustable constant-interest source circuit 20 is increased.
Optionally, the controller often controls the adjustable constant current source circuit 20 by the PWM control signal, and thus, in the actual adjusting process, the duty ratio of the PWM control signal may be changed.
Alternatively, as a most common and effective option, the light intensity value collecting module 40 may be implemented by a photo sensor. The photoelectric sensor can output corresponding induced voltage according to the intensity value of the received light, correspondingly, for the controller, the corresponding relation between the induced voltage and the light intensity value can be pre-established, and after a certain induced voltage value is obtained, the light intensity value corresponding to the induced voltage value can be determined and obtained according to the pre-established corresponding relation between the induced voltage and the light intensity value.
It is conceivable that, in practical applications, the lighting device should further include other components, such as a structural frame for installation, a housing, a switch for controlling the light source to be turned on or off, and the like.
In summary, in the illumination device provided in the embodiment of the present invention, the current intensity value of the light, which is collected by the light intensity value collection module and passes through the light guide structure, is the intensity value of the light actually irradiated into the illumination area, and is also a direct representation of the illumination effect actually experienced by the user of the illumination device.
In lighting device's actual production, light guide structure often arranges in lighting device's outermost, consequently, when using light intensity value collection module to gather the light intensity value of the light through light guide structure, light intensity value collection module's setting is comparatively difficult, wants many-sided conditions such as comprehensive lighting device outward appearance, installation convenience to consider. Therefore, another lighting device provided by the embodiment of the present invention can well solve the problems of the installation of the light intensity value acquisition module and the structure of the lighting device, and optionally, refer to fig. 2, where fig. 2 is a schematic structural diagram of another lighting device provided by the embodiment of the present invention. The lighting device provided by the embodiment further has the following features on the basis of the embodiment shown in fig. 1:
It should be noted that, in the embodiment of the present invention, the light reflector 50 and the light intensity value acquisition module 40 are correspondingly arranged, which mainly means that the position relationship between the light reflector 50 and the light intensity value acquisition module 40 corresponds to each other, that is, the light intensity value acquisition module 40 is arranged in a plane perpendicular to the propagation path of the light reflected by the light reflector 50, so that the light intensity value acquisition module 40 can vertically receive the light reflected by the light reflector 50, thereby ensuring that an accurate light intensity value can be fed back. It is important that the specific intensity value reflection ratio of the reflected light ray as a certain light emitting body should be known definitely.
Alternatively, the light-reflecting body 50 may be a light-reflecting coating layer disposed on the surface of the light guide structure 30. The light reflecting coating is used as the light reflecting body 50, has the advantages of small specific volume and easy integration with the light guide structure 30, can be directly coated or embedded on the surface of the light guide structure 30, and can not increase the appearance volume of the light guide structure 30 while reflecting corresponding light.
It is conceivable that, when the lighting device provided by the embodiment of the present invention is implemented, the position of the light intensity value collection module may be flexibly adjusted in most cases, and therefore, in design, the position of the reflector may be determined first, and then the setting position of the light intensity value collection module may be adjusted based on the position of the reflector until the two satisfy the above correspondence relationship.
In summary, according to the illumination device provided by the embodiment of the present invention, the light guide structure is provided with the light reflector, so that the light intensity value of the light passing through the light guide structure is collected more ergodically by the light intensity value collection module, and meanwhile, the design structure of the illumination device can be simplified, and meanwhile, the technical effect of the illumination device provided by the embodiment shown in fig. 1 is achieved.
It should be noted that, in practical application of the lighting device, factors that can affect the lighting effect are not only aging of the light guide structure, but also the adjustable constant current source circuit is obviously affected by temperature, and the output current drifts. The lighting device provided by the embodiment of the invention is adjusted based on the light intensity value of the light rays actually emitted by the lighting device, and the light intensity value sensed by a user can be always maintained in a set range.
Based on the lighting device provided in the foregoing embodiment, the present invention further provides a lighting control method, where the lighting control method provided in the embodiment of the present invention is applied to the controller in the lighting device provided in any one of the foregoing embodiments, optionally, referring to fig. 3, where fig. 3 is a flowchart of the lighting control method provided in the embodiment of the present invention, and the flowchart may include:
s100, obtaining the current intensity value of the light after passing through the light guide structure of the lighting device.
As mentioned above, the controller in the lighting device receives the current intensity value of the light fed back by the light intensity value collecting module after passing through the light guide structure.
Optionally, if the light intensity value acquisition module adopts a photoelectric sensor, based on the basic principle of the photoelectric sensor, the voltage value that can be obtained by the controller should be a voltage value, and of course, the voltage value corresponds to the current intensity value received by the photoelectric sensor.
In this case, a preset mapping relationship is stored in the controller of the lighting device, and the preset mapping relationship records a corresponding relationship between the voltage value and the light intensity value of the photoelectric sensor.
Further, if the light guiding structure of the lighting device is provided with a reflector, and the reflector reflects the received light according to a preset light intensity value reflection ratio. Of course, for a specific lighting device, the light intensity value emission ratio of the reflector is clearly known and is pre-stored in the memory area of the controller.
In this case, after obtaining the voltage value fed back by the photo sensor, the quotient between the voltage value fed back by the photo sensor and the reflection ratio of the light intensity value should be further calculated, the obtained result is used as the final voltage value fed back by the photo sensor, and the preset mapping relationship is queried according to the final voltage value fed back to obtain the current intensity value.
It is conceivable that the preset mapping relationship may be directly queried after obtaining the voltage value fed back by the photoelectric sensor, and a light intensity value is determined, and of course, the light intensity value is not the light intensity value of the lighting device actually generating light, and the light intensity value should be further divided by the light intensity value emission ratio of the reflector, and the obtained result is used as the final current intensity value.
And S110, judging whether the current intensity value is in a preset range, if not, executing S120, and if so, executing S130.
After the current intensity value is obtained, whether the current intensity value is within a preset range or not can be further judged, if the current intensity value is within the preset range, the lighting effect of the lighting device meets the expected requirement, S130 is executed, and the current adjustment is finished; accordingly, if the current intensity value is not within the preset range, S120 is performed to adjust the output current of the adjustable constant current circuit in the lighting device, and the process returns to S100.
And S120, adjusting the output current of the adjustable constant current source circuit in the lighting device, and returning to S100.
As mentioned above, the magnitude of the output current of the adjustable constant current source circuit is controlled by the controller connected to the control end of the adjustable constant current source circuit, and specifically, the controller outputs the PWM signal to the adjustable constant current source circuit, adjusts the duty ratio of the PWM signal to obtain the adjusted PWM signal, and sends the adjusted PWM signal to the adjustable constant current source circuit, so as to adjust the output current of the adjustable constant current source circuit.
For example, the output current of the adjustable constant current source circuit is a constant value of 100mA, and if the controller adjusts the duty ratio of the PWM signal to 80% of the original duty ratio to control the adjustable constant current source circuit, the actual output current of the adjustable constant current source circuit is stabilized at 80 mA. The output current of the constant current source circuit can be adjusted to be changed only along with the change of the duty ratio of the PWM signal sent by the controller and not along with the change of the power supply voltage.
It is conceivable that the output current of the adjustable constant current source circuit is decreased if the aforementioned present intensity value is larger than the upper limit value of the preset range; on the contrary, if the current intensity value is smaller than the lower limit value of the preset range, the output current of the adjustable constant current source circuit is increased.
Optionally, after completing the adjustment of the duty ratio once, the method may return to step S100, and obtain the adjusted current intensity value again, and if the current intensity value is within the preset range, the adjustment is not needed, and step S130 is performed; correspondingly, if the current intensity value is not within the preset range after one adjustment, the adjustment is performed again until the current intensity value is within the preset range, and S130 is performed.
It is conceivable that, for the adjustment range of the duty ratio of the PWM signal, the specific difference between the current intensity value and the preset range may be set in an equal proportion, so as to reduce the number of times of repeated adjustment and restore the preset lighting effect of the lighting device as soon as possible.
And S130, finishing the adjustment.
After the current intensity value of the lighting device is within the preset range, S130 may be executed to end the adjustment.
It is conceivable that, after the adjustment is finished, the operation may immediately return to step S100 to implement the uninterrupted lighting effect monitoring control, or the lighting control method provided by the embodiment of the present invention may be executed after the preset time period is suspended, that is, the lighting control method provided by the embodiment of the present invention is periodically executed. The present invention does not limit the specific execution period of the lighting control method.
In summary, according to the illumination control method provided by the embodiment of the present invention, the controller collects the current intensity value of the light passing through the light guide structure, which is the intensity value of the light actually irradiated into the illumination area, and is also a direct representation of the illumination effect actually experienced by the user of the illumination apparatus, if the current intensity value is not within the preset range due to aging of the light guide structure, it can be determined that the illumination effect in the illumination area has changed significantly, and in the method, the luminance of the light source is changed by adjusting the output current of the adjustable constant current source until the obtained current intensity value is within the preset range, so as to counteract the influence of the aging of the light guide structure on the illumination effect.
In the following, the lighting control apparatus provided in the embodiment of the present invention is introduced, and the lighting control apparatus described below may be regarded as a functional module architecture that needs to be set in the central device to implement the lighting control method provided in the embodiment of the present invention; the following description may be cross-referenced with the above.
Optionally, referring to fig. 4, fig. 4 is a block diagram of a lighting control device according to an embodiment of the present invention, where the lighting control device may include:
the obtaining unit 10 is configured to obtain a current intensity value of light passing through a light guide structure of the lighting device;
a judging unit 20, configured to judge whether the current intensity value is within a preset range;
the adjusting unit 30 is configured to adjust the output current of the adjustable constant current source circuit in the lighting device until the current intensity value is within the preset range, if the current intensity value is not within the preset range.
Optionally, if a light intensity value collecting module in the lighting device is a photoelectric sensor, the obtaining unit 10 is configured to obtain a current intensity value of light passing through a light guide structure of the lighting device, and specifically includes:
acquiring a current voltage value fed back by the photoelectric sensor;
and determining a light intensity value corresponding to the current voltage value according to a preset mapping relation to obtain a current intensity value corresponding to the light passing through a light guide structure of the lighting device, wherein the preset mapping relation records a corresponding relation between the voltage value of the photoelectric sensor and the light intensity value.
Optionally, if the light guide structure is provided with a reflector, the obtaining unit 10 is configured to obtain a current voltage value fed back by the photoelectric sensor, and specifically includes:
acquiring a voltage value fed back by the photoelectric sensor and a light intensity value reflection ratio of the reflector;
and taking the quotient of the voltage value fed back by the photoelectric sensor and the reflection ratio of the light intensity value as the current voltage value fed back by the photoelectric sensor.
Optionally, when the adjusting unit 30 is used to adjust the output current of the adjustable constant current source circuit in the lighting device, the adjusting unit specifically includes:
adjusting the duty ratio of the PWM signal to obtain an adjusted PWM signal;
and sending the regulated PWM signal to an adjustable constant current source circuit in the lighting device so that the adjustable constant current source circuit outputs current according to the regulated PWM signal.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection 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. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An illumination device, comprising: a light source, an adjustable constant current source circuit, a light guide structure, a light intensity value acquisition module and a controller, wherein,
the output end of the adjustable constant current source circuit is connected with the light source;
the light guide structure is arranged in the light irradiation direction of the light source;
the light intensity value acquisition module acquires the current intensity value of the light passing through the light guide structure;
the controller is respectively connected with the control end of the adjustable constant current source circuit and the output end of the light intensity value acquisition module, and the controller is used for adjusting the output current of the adjustable constant current source circuit according to the current intensity value until the current intensity value is within a preset range.
2. A lighting device as recited in claim 1, wherein said light-guiding structure is provided with a light reflector, wherein,
the light reflecting body is arranged corresponding to the light intensity value acquisition module and used for reflecting light rays which are in a preset proportion and pass through the light guide structure to the light intensity value acquisition module.
3. A lighting device as recited in claim 2, wherein said light reflector comprises a light reflecting coating disposed on a surface of said light guide structure.
4. The lighting device as defined in claim 1, wherein the light intensity value collection module comprises a photosensor.
5. A lighting device as recited in claim 1, wherein said light source comprises at least one LED light bead.
6. A lighting device as recited in claim 1, wherein said light source comprises at least one patch LED.
7. A lighting control method applied to the lighting device according to any one of claims 1 to 6, the method comprising:
obtaining the current intensity value of light rays passing through a light guide structure of the lighting device;
judging whether the current intensity value is within a preset range;
and if the current intensity value is not in the preset range, adjusting the output current of an adjustable constant current source circuit in the lighting device until the current intensity value is in the preset range.
8. The illumination control method according to claim 7, wherein if the light intensity value acquisition module in the illumination device is a photoelectric sensor, the acquiring a current intensity value of the light passing through the light guide structure of the illumination device includes:
acquiring a current voltage value fed back by the photoelectric sensor;
and determining a light intensity value corresponding to the current voltage value according to a preset mapping relation to obtain a current intensity value corresponding to the light passing through a light guide structure of the lighting device, wherein the preset mapping relation records a corresponding relation between the voltage value of the photoelectric sensor and the light intensity value.
9. The illumination control method according to claim 8, wherein if the light guide structure is provided with a reflector, the obtaining a current voltage value fed back by the photosensor comprises:
acquiring a voltage value fed back by the photoelectric sensor and a light intensity value reflection ratio of the reflector;
and taking the quotient of the voltage value fed back by the photoelectric sensor and the reflection ratio of the light intensity value as the current voltage value fed back by the photoelectric sensor.
10. The lighting control method of claim 7, wherein said adjusting the output current of an adjustable constant current source circuit in the lighting device comprises:
adjusting the duty ratio of the PWM signal to obtain an adjusted PWM signal;
and sending the regulated PWM signal to an adjustable constant current source circuit in the lighting device so that the adjustable constant current source circuit outputs current according to the regulated PWM signal.
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| JP2018147605A (en) * | 2017-03-01 | 2018-09-20 | パナソニックＩｐマネジメント株式会社 | Lighting device, lighting apparatus and electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112996174A (en) * | 2021-04-17 | 2021-06-18 | 深圳科宏健半导体照明有限公司 | High-heat-dissipation type explosion-proof LED industrial illuminating lamp |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Applicant after: Beijing Jingwei Hengrun Technology Co.,Ltd. Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Applicant before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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Application publication date: 20200626 |