CN110113835B

CN110113835B - LED light source control device, method, light source component and photoelectric pulse detection device

Info

Publication number: CN110113835B
Application number: CN201910237960.2A
Authority: CN
Inventors: 唐明; 陈建强; 欧阳威; 张小东
Original assignee: Shenzhen JPT Optoelectronics Co Ltd
Current assignee: Shenzhen JPT Optoelectronics Co Ltd
Priority date: 2019-03-27
Filing date: 2019-03-27
Publication date: 2021-08-27
Anticipated expiration: 2039-03-27
Also published as: CN110113835A; WO2020192694A1

Abstract

The application relates to an LED light source control device, an LED light source control method, a light source component and a photoelectric pulse detection device. The LED light source control device is used for controlling the LED light source, and the LED light source comprises a plurality of LED lamps. The LED light source control device comprises a plurality of constant current driving modules and a control module. The constant current driving modules are respectively electrically connected with the LED lamps and used for driving the LED lamps. The control module comprises a uniformity processing module and a current control module. The uniformity processing module is electrically connected with the current control module, and the current control module is electrically connected with the constant current driving modules respectively. The uniformity processing module is used for receiving uniformity parameters of the LED light source and determining a driving current adjusting scheme for the plurality of LED lamps according to the uniformity parameters. The current control module is used for adjusting the driving currents of the LED lamps according to the driving current adjusting scheme. The LED light source control device can improve the uniformity of the LED light source.

Description

LED light source control device, method, light source component and photoelectric pulse detection device

Technical Field

The present disclosure relates to the field of LEDs, and in particular, to an LED light source control device, method, light source assembly and photoelectric pulse detection device.

Background

An LED (Light Emitting Diode) is a semiconductor electronic component that converts electrical energy into optical energy. With the continuous progress of technology, LEDs have been widely used for displays, televisions, lighting decorations, and illumination.

The LED light source generally includes a plurality of LED lamps. Brightness uniformity is an important indicator of LED light sources. The LED light source in the conventional art has a problem of poor brightness uniformity due to non-uniformity of a mounting position, a driving voltage or a current, and the like.

Disclosure of Invention

In view of the above, it is desirable to provide an LED light source control device, method, light source module and photoelectric pulse detection device.

An LED light source control apparatus for controlling an LED light source including a plurality of LED lamps, comprising:

the constant current driving modules are respectively electrically connected with the LED lamps and used for driving the LED lamps;

the control module comprises a uniformity processing module and a current control module, the uniformity processing module is electrically connected with the current control module, and the current control module is electrically connected with the constant current driving modules respectively; the uniformity processing module is used for receiving uniformity parameters of the LED light source and determining a driving current adjusting scheme for the plurality of LED lamps according to the uniformity parameters; the current control module is used for adjusting the driving currents of the LED lamps according to the driving current adjusting scheme.

In one embodiment, the control module further comprises:

the current control module is electrically connected with the constant current driving modules through the driving control module respectively, and the synchronous driving control module is used for controlling the constant current driving modules to work synchronously according to the driving currents of the LED lamps.

In one embodiment, the constant current driving module includes:

the constant current control module is electrically connected with the LED lamp;

the digital-to-analog conversion module is electrically connected with the constant current control module and the synchronous drive control module and is used for converting digital signals into analog signals;

the LED light source control device also comprises a plurality of analog-to-digital conversion modules which are respectively electrically connected with the constant current control modules, and are electrically connected with the synchronous drive control modules and used for converting analog signals into digital signals.

In one embodiment, the LED light source control device further includes:

and the constant temperature device is arranged at the bottom of the LED light source and used for adjusting the temperature of the LED light source and keeping the temperature of the LED light source constant.

In one embodiment, the thermostat device includes:

the temperature adjusting component is arranged at the bottom of the LED light source and used for adjusting the temperature of the LED light source;

the temperature detection assembly is arranged at the bottom of the LED light source and used for detecting the temperature of the LED light source;

the temperature adjusting driving module is electrically connected with the temperature adjusting assembly;

the control module further comprises a temperature control module, and the temperature control module is electrically connected with the temperature adjusting driving module and the temperature detection assembly;

the temperature control module is used for outputting a control signal to the temperature adjusting driving module according to a preset temperature and the temperature detected by the temperature detection assembly;

the temperature adjusting driving module is used for driving the temperature adjusting assembly to work according to the control signal output by the temperature control module, so that the temperature of the LED light source is kept constant.

In one embodiment, the LED light source control device further includes:

the photoelectric detection device is used for detecting the light intensity signal of the LED light source and converting the light intensity signal into a light intensity electric signal;

the control module group further comprises a light intensity alarm module, the light intensity alarm module is electrically connected with the photoelectric detection device and used for comparing the light intensity electric signal with a preset threshold value, and when the light intensity electric signal is larger than the preset threshold value, an alarm signal is output.

An LED light source assembly comprising:

an LED light source comprising a plurality of LED lamps;

the LED light source control device comprises a plurality of constant current driving modules, a control module and a constant temperature device;

the plurality of constant current driving modules are respectively electrically connected with the plurality of LED lamps and used for driving the plurality of LED lamps;

the constant temperature device is arranged at the bottom of the LED light source and used for adjusting the temperature of the LED light source and keeping the temperature of the LED light source constant;

the control module comprises a uniformity processing module, a current control module and a synchronous driving control module, wherein the uniformity processing module is electrically connected with the current control module and is used for receiving uniformity parameters of the LED light source and determining driving current adjusting schemes for the plurality of LED lamps according to the uniformity parameters; the current control module is electrically connected with the constant current driving modules through the driving control module respectively, and is used for adjusting the driving currents of the LED lamps according to the driving current adjusting scheme; the synchronous drive control module is used for respectively controlling the constant current drive modules to synchronously work according to the drive currents of the LED lamps.

A photoelectric pulse detection device comprises the LED light source component.

The embodiment of the application provides LED light source controlling means LED light source subassembly and photoelectricity pulse detection device includes a plurality of constant current drive module with the control module group. The plurality of constant current driving modules are respectively electrically connected with the plurality of LED lamps, so that the plurality of LED lamps can be driven independently. The driving of each LED lamp is not influenced by other LED lamps, so that the stability of the LED light source is improved. The control module comprises a uniformity processing module and the current control module. The uniformity processing module receives the uniformity parameters and determines a driving current driving scheme for the plurality of LED lamps according to the uniformity parameters. The current control module adjusts the driving currents of the plurality of LED lamps according to the driving current adjusting scheme, so that the light intensity of the LED lamps is adjusted respectively, and the LED light source is uniform in light emitting. The embodiment of the application provides LED light source controlling means LED light source subassembly and photoelectricity pulse detection device can effectively improve the homogeneity of LED light source improves the light-emitting effect of LED light source.

An LED light source control method for controlling an LED light source comprising a plurality of LED lights, the method comprising:

obtaining uniformity parameters of the LED light source, wherein the uniformity parameters represent the uniformity of the light intensity of the LED light source;

determining a driving current adjustment scheme for the plurality of LED lamps according to the uniformity parameter, wherein the driving current adjustment scheme comprises the number and the adjustment value of the LED lamp needing to adjust the driving current;

adjusting the driving current of the plurality of LED lamps according to the driving current adjustment scheme.

In one embodiment, the determining the driving current adjustment scheme for the plurality of LED lamps according to the uniformity parameter includes:

determining the light intensity of each LED lamp according to the uniformity parameter;

determining the driving current adjusting scheme according to the light intensity of each LED lamp;

comparing the light intensity of each LED lamp with a corresponding preset light intensity threshold value;

and when the light intensity of the LED lamp is not equal to the corresponding preset light intensity threshold value, acquiring the serial number of the LED lamp, and determining the adjustment value of the LED lamp according to the light intensity of the LED lamp and the corresponding preset light intensity threshold value.

According to the method provided by the embodiment of the application, the uniformity parameters of the LED light sources are obtained, and the driving current adjustment schemes of the LED lamps are determined according to the uniformity parameters. And further adjusting the driving current of the plurality of LED lamps according to the driving current adjusting scheme, so that the light emitting intensity of each LED lamp in the LED light source can be adjusted in real time, the LED light source emits light uniformly, and the light emitting effect is improved.

Drawings

Fig. 1 is a schematic structural diagram of an LED light source control device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of an LED light source control device according to an embodiment of the present application;

FIG. 3 is a circuit diagram of a constant current control module provided in one embodiment of the present application;

fig. 4 is a circuit diagram of a digital-to-analog conversion module according to an embodiment of the present application;

fig. 5 is a circuit diagram of an analog-to-digital conversion module according to an embodiment of the present application;

fig. 6 is a circuit diagram of a temperature adjustment driving module according to an embodiment of the present application;

FIG. 7 is a flowchart illustrating steps of a method for controlling an LED light source according to an embodiment of the present disclosure;

FIG. 8 is a flowchart illustrating steps provided in one embodiment of the present application for determining a driving current adjustment scheme for the plurality of LED lamps based on the uniformity parameter;

fig. 9 is a flowchart illustrating steps of determining the driving current adjustment scheme according to the light intensity of each LED lamp according to an embodiment of the present application.

Description of the reference numerals

LED light source control device 10

Constant current driving module 100

Constant current control module 110

Digital-to-analog conversion module 120

Control module 200

Uniformity processing module 210

Current control module 220

Synchronous drive control module 230

Temperature control module 240

Light intensity alarm module 250

Analog-to-digital conversion module 300

Constant temperature device 400

Temperature regulating assembly 410

Temperature sensing assembly 420

Temperature regulating driving module 430

Photo-detection device 500

LED light source 20

LED lamp 21

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below by way of embodiments and with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be considered as limiting the present application.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The embodiment of the application provides an LED light source control device 10 and an LED light source assembly. In one embodiment, the LED light source control device 10 and the LED light source assembly may be applied to a photo-pulse detection device. The photoelectric pulse detection device is used for detecting the pulse of a human body, so that the heart rate condition of the human body is reflected. The Photoelectric pulse detection device mainly comprises an LED light source component and a Photoelectric Detector (PD). The principle of the photoelectric pulse detection device for detecting the pulse is mainly that the LED light source component emits light and irradiates arterial blood. Light is reflected through the arterial blood onto the PD. The pulse condition can be calculated by the light intensity received by the PD. Photoelectric pulse detection device can exclusive use, also can integrate on wearable electronic equipment such as intelligent bracelet, intelligent wrist strap.

Based on the principle that the photoelectric pulse detection device detects the pulse, whether the light output of the LED light source component used by the photoelectric pulse detection device is uniform or not is of great importance to the accuracy of pulse detection. Therefore, the embodiment of the application provides LED light source controlling means 10 with LED light source subassembly is applied to photoelectricity pulse detection device, have the pulse detection function on intelligent bracelet, intelligent wrist strap etc. can effectively improve the accuracy that the pulse detected.

In one embodiment, the LED light source control device 10 and the LED light source assembly can also be applied to detection of PD array functions. The LED light source control device 10 controls the LED light source to emit uniform light, and projects the light onto the PD array. The photoelectric effect of the PD array converts the projected optical signal into an electrical signal. The post-stage acquisition system acquires an electric signal and judges the strength of the acquired electric signal so as to judge the performance of the PD array. The light source capable of generating uniform light is adopted to detect the PD array function, the influence of the light source on the intensity of the collected signal can be effectively eliminated, and the detection accuracy is improved.

In one embodiment, the LED light source control device 10 and the LED light source can also be applied to test the light transmission uniformity of light transmission materials, such as glass lenses, and the like, so as to improve the detection accuracy.

In other embodiments, the LED light source assembly can also be used as a light source of an industrial Camera (CDD) to improve the shooting effect of the camera.

The LED light source control device 10 and the LED light source assembly are further described with reference to specific embodiments.

Referring to fig. 1, in one embodiment, the LED light source control device 10 is used for controlling an LED light source 20. The LED light source 20 includes a plurality of LED lamps 21. The number of the LED lamps 21 is not limited. The plurality of LED lamps 21 may be disposed on the PCB board. The arrangement and the shape of the LED lamps 21 are not limited, and may be a circular array or a directional array.

The LED light source control device 10 includes a plurality of constant current driving modules 100 and a control module 200. The control module 200 includes a uniformity processing module 210 and a current control module 220.

The plurality of constant current driving modules 100 are electrically connected to the plurality of LED lamps 21, respectively. The uniformity processing module 210 is electrically coupled to the current control module 220. The current control module 220 is electrically connected to the plurality of constant current driving modules 100, respectively.

The number of the constant current driving modules 100 is the same as that of the LED lamps 21. The constant current driving module 100 is configured to drive the LED lamp 21 to be turned on at a constant current. The structure of the constant current module 100 is not particularly limited, and may be selected according to actual requirements.

The uniformity processing module 210 is configured to receive the uniformity parameter of the LED light source 20 and determine a driving current adjustment scheme of the LED lamps 21 according to the uniformity parameter. Wherein the uniformity parameter is used to characterize the uniformity of the light intensity of the LED light source 20. For example, the LED light source 20 is a 2 × 10 matrix formed by 20 LED lamps 21. The 20 LED lamps 21 emit light simultaneously, and the final light emitting effect is displayed, and the light intensity numbered (1, 1), (1, 5) and (2, 1) in the matrix is weak, so that the uniformity parameter is A. The uniformity parameter can be an image parameter, a digital parameter, or any other parameter capable of representing the difference condition of the light intensity of each LED lamp. The uniformity parameter can be obtained by detecting the uniformity parameter by a device and transmitted to the uniformity processing module. The uniformity parameter can also be detected by manual visual inspection or manual hand-held equipment, and inputted into the uniformity processing module 210 through a keyboard or the like. Specifically, the manner of obtaining the uniformity parameter and the expression form of the uniformity parameter are not limited in this application. The driving current adjusting scheme refers to adjusting the driving current of each LED lamp 21 according to the uniformity parameter. The drive current adjustment schemes include, but are not limited to: whether the LED lamp 21 needs to be adjusted, the number of the LED lamp 21 whose driving current needs to be adjusted, and the driving current adjustment value of the LED lamp 21 whose driving current needs to be adjusted. For example, the driving current adjustment scheme derived from the uniformity parameter is: the LED lamps 21 numbered (1, 1) and (2, 1) need to be adjusted; the drive current adjustment value for the LED lamp 21 numbered (1, 1) is +2mA, and the drive current adjustment value for the LED lamp 21 numbered (2, 1) is +1 mA.

The current control module 220 is configured to adjust the driving currents of the plurality of LED lamps 21 according to the driving current adjustment scheme. The current control module 220 is directly or indirectly electrically connected to each of the constant current driving modules 100, and correspondingly sends the adjusted driving current to each of the LED lamps 21. The constant current driving module 100 drives the corresponding LED lamp 21 to light up with the driving current.

The uniformity processing module 210 and the current control module 220 may be implemented by a hardware circuit, or may be implemented by a combination of a chip and a software program. The uniformity processing module 210 and the current control module 220 may be separately provided or may be integrated into a single structure. In a specific embodiment, the functions of the uniformity processing module 210 and the current control module 220 are implemented by programming a Micro Controller Unit (MCU). The MCU may include a plurality of pins and an interface. The MCU is connected to the plurality of constant current driver modules 100 and other modules or devices through pins and interfaces.

The working process of the LED light source control device 10 is as follows: the uniformity processing module 210 receives the uniformity processing module 210, performs calculation processing in a preset manner, and determines the driving current adjustment schemes for the plurality of LED lamps 21. The uniformity processing module 210 transmits the driving current adjustment scheme to the plurality of constant current driving modules 100. The plurality of constant current driving modules 100 drive the plurality of LED lamps 21 to light up. The LED light source control device 10 repeats the above process and continuously adjusts the driving current to adjust the brightness of each of the LED lamps 21, so that the light emitted from the LED lamps 21 is uniformly distributed in the effective area.

In this embodiment, the LED light source control device 10 includes the plurality of constant current driving modules 100 and the control module 200. The constant current driving modules 100 are electrically connected to the LED lamps 21, respectively, so as to individually drive the LED lamps 21. The driving of each LED lamp 21 is not affected by the other LED lamps 21, which improves the stability of the LED light source 20. The control module 200 includes a uniformity processing module 210 and the current control module 220. The uniformity processing module 210 receives the uniformity parameter and determines a driving current driving scheme for the plurality of LED lamps 21 according to the uniformity parameter. The current control module 220 adjusts the driving currents of the plurality of LED lamps 21 according to the driving current adjustment scheme, so as to adjust the light intensities of the LED lamps 21 respectively, thereby achieving uniform light emission of the LED light source 20. The LED light source control device 10 provided in this embodiment can effectively improve the uniformity of the LED light source 20, and improve the light emitting effect of the LED light source 20.

Referring to fig. 2, in one embodiment, the control module 200 further includes a synchronous driving control module 230. The synchronous driving control module 230 is connected between the plurality of constant current driving modules 100 and the current control module 220. An output terminal of the current control module 220 is electrically connected to an input terminal of the synchronous drive control module 230. The output end of the synchronous driving control module 230 is electrically connected to the plurality of constant current driving modules 100. The synchronous driving control module 230 is configured to control the constant current driving modules 100 to work synchronously according to the driving currents of the LED lamps 21.

In one embodiment, the synchronous drive control module 230 may be a Field-Programmable Gate Array (FPGA). When the MCU realizes the functions of the uniformity processing module 210 and the current control module 220, the executed codes are sequential loops, and the timeliness is not good. The codes of the FPGA can be executed in parallel, and timeliness is better. Therefore, the FPGA can realize the synchronous lighting of a plurality of the LED lamps 21. In addition, the time from receiving an instruction by the MCU to executing the instruction is not fixed, and the time from receiving an instruction by the FPGA to executing the instruction is fixed, so that the work synchronization of the plurality of LED lamps 21 can be realized by the FPGA.

In one embodiment, each of the constant current driving modules 100 includes a constant current control module 110 and a digital-to-analog conversion module 120. The input end of the digital-to-analog conversion module 120 is electrically connected with the output end of the constant current control module 110. The output end of the digital-to-analog conversion module 120 is connected with the input end of the constant current control module 110. The constant current control module 110 is electrically connected to the LED lamp 21. The digital-to-analog conversion module 120 is configured to convert the driving current digital signal output by the synchronous driving control module 230 into a driving current analog signal. The constant current control module 110 is configured to drive the LED lamp 21 according to the driving current analog signal. The specific circuit of the constant current control module 110 may include a current negative feedback formed by a sampling resistor, an operational amplifier, and the like. The sampling resistor is used for collecting the current of the LED lamp 21 and feeding back the current to the operational amplifier. The operational amplifier adjusts the current of the LED lamp 21 in real time according to the current of the LED lamp 21 and the driving current input by the digital-to-analog conversion module 120, so as to realize constant current driving. In one embodiment, the constant current control module 110 is shown in circuit diagram form in FIG. 3. The circuit diagram of the digital-to-analog conversion module 120 is shown in fig. 4.

In one embodiment, the LED light source control device 10 further includes a plurality of analog-to-digital conversion modules 300. The input ends of the analog-to-digital conversion modules 300 are electrically connected with the output ends of the constant current control modules 110, respectively. The output ends of the analog-to-digital conversion modules 300 are electrically connected with the input end of the synchronous driving control module 230, respectively. The analog-to-digital conversion module 300 is configured to convert the current analog current signal of the LED lamp 21 collected by the sampling resistor in the constant current control module 110 into a digital current signal, and output the digital current signal to the synchronous driving control module 230. The synchronous drive control module 230 further transmits the digital current signal to the MCU. The MCU may set the output port. The current output of the LED lamp 21 is displayed through an output port. In one embodiment, the circuit diagram of the analog-to-digital conversion module 300 is shown in fig. 5.

Referring to fig. 2, in an embodiment, the LED light source control device 10 further includes a thermostat 400. The constant temperature device 400 is disposed at the bottom of the LED light source 20. The thermostat 400 may be disposed at the bottom of the PCB board of the LED light source 20. The thermostat 400 is used for adjusting the temperature of the bottom of the LED light source 20 to keep the temperature of the LED light source 20 constant, so that the plurality of LED lamps 21 are not affected by the ambient temperature and the power is kept stable. The power stability of the LED light source 20 is the basis of constant current driving and light emitting uniformity.

The specific structure of the thermostatic device 400 can be selected according to actual requirements. In one embodiment, the thermostat 400 includes a temperature regulating component 410, a temperature detecting component 420, and a temperature control portion. The temperature control part is electrically connected with the temperature adjusting assembly 410 and the temperature detecting assembly 420. The temperature adjustment component 410 and the temperature detection component 420 are both disposed at the bottom of the LED light source 20. The temperature adjustment assembly 410 is used to adjust the temperature of the LED light source 20. The temperature detecting assembly 420 is used for detecting the temperature of the LED light source 20. The temperature detecting assembly 420 may be a temperature sensor disposed on the PCB board of the plurality of LED lamps 21. The temperature adjustment assembly 410 may have an area. The temperature adjustment assembly 410 may adjust the ambient temperature of the LED light source 20 by transferring heat or cooling to the PCB board of the LED lamp 21.

The temperature control part is used for controlling the temperature adjusting component 410 to work through the current temperature of the LED light source 20 detected by the temperature detecting component 420, so as to adjust the temperature of the LED light source 20. The temperature control part can be realized by a temperature control circuit, and can also be realized by a chip and a program. In one embodiment, the control module 200 may further include a temperature control module 240. The temperature control module 240 is electrically connected to the temperature adjustment assembly and the temperature detection assembly 420. The temperature control module 240 is configured to adjust and control the operation of the temperature adjustment component 410 according to a preset temperature and the temperature detected by the temperature detection component 420, so that the temperature of the LED light source 20 is maintained at the preset temperature and kept constant.

One such temperature regulating assembly 410 is a semiconductor cooler. The temperature control module 240 controls the semiconductor refrigerator to operate according to the temperature detected by the temperature detection assembly 420 and a preset temperature value. When the temperature detecting assembly 420 detects that the current temperature of the LED light source 20 is higher than a preset temperature value, the temperature control module 240 controls the semiconductor refrigerator to refrigerate. When the current temperature of the LED light source 20 detected by the temperature detecting assembly 420 is lower than a preset temperature value, the temperature control module 240 controls the semiconductor refrigerator to heat.

In one embodiment, the thermostat 400 further comprises a thermostat drive module 430. The temperature adjusting driving module 430 is electrically connected with the temperature adjusting assembly 410 and the temperature control module 240. The temperature control module 240 obtains the current temperature of the LED light source 20 and the preset temperature according to the detection of the temperature detection component 420, and outputs a control signal for operating the temperature adjustment component 410. The temperature adjusting driving module 430 further drives the temperature adjusting component 410 to operate according to the control signal. In one embodiment, the circuit diagram of the tempering drive module 430 is shown in fig. 6.

Referring to fig. 2, in an embodiment, the LED light source control device 10 further includes a photo detector 500. The photo detection device 500 can be disposed around the LED light source 20 without affecting the light emitting direction and the light emitting intensity. For example, the photo detection device 500 may be disposed on an inner wall of a housing in which the LED light source 20 is installed. The photo detector 500 is used for detecting the light intensity signal of the LED light source 20 and converting the light intensity signal into a light intensity electrical signal. The control module 200 further comprises a light intensity alarm module 250. The light intensity alarm module 250 is electrically connected to the photo detector 500. The light intensity alarm module 250 is used for comparing the light intensity electrical signal with a preset threshold. When the light intensity electrical signal is greater than the preset threshold, the light intensity alarm module 250 outputs an alarm signal. The light intensity alarm module 250 may further be electrically connected to an alarm device. The alarm device can be a sound alarm device, a light alarm device and a device for simultaneously giving an alarm by sound and light. In this embodiment, through the photoelectric detection device 500 and the light intensity alarm module 250, when the light intensity of the LED light source 20 is too strong, an alarm signal is output to prompt the worker of the abnormal condition that the light intensity is too strong, so that the worker can adjust and process the light intensity in time.

An embodiment of the present application further provides an LED light source control system. The LED light source control system comprises the LED light source control device 10 as described above and a processor. The processor is in communication with the control module 200 of the LED light source control device 10. The processor may be a processor of a computer device, a Programmable Logic Controller (PLC), or a host computer. The processor and the control module 20 may be connected by wire or wirelessly. The relevant control signals may be input to the control module 20 by the processor. The output signals of the control module 20 may also be further processed or displayed, etc. by the processor. The LED light source control system provided by this embodiment includes the LED light source control device 10. The LED light source control device 10 can realize uniform light output of the LED light source 20. The LED light source control system improves the light-emitting uniformity of the LED light source 20 and improves the light-emitting effect of the LED light source 20.

One embodiment of the present disclosure provides an LED light source assembly, which includes an LED light source 20 and an LED light source control device 10. The LED light source includes a plurality of LED lamps 21. The LED light source control device 10 includes a plurality of constant current driving modules 100, a control module 200, and a thermostat 400.

The constant current driving modules 100 are electrically connected to the LED lamps 21, respectively. The constant current driving modules 100 are used for driving the LED lamps 21. The constant temperature device 400 is disposed at the bottom of the LED light source 20. The thermostat 400 is used for adjusting the temperature of the bottom of the LED light source 20 and keeping the temperature of the LED light source 20 constant.

The control module 200 includes a uniformity processing module 210, a current control module 220, and a synchronous drive control module 230. The uniformity processing module 210 is electrically connected to the current control module 220, and the uniformity processing module 210 is configured to receive a uniformity parameter of the LED light source 20 and determine a driving current adjustment scheme for the plurality of LED lamps 21 according to the uniformity parameter. The current control module 220 is electrically connected to the plurality of constant current driving modules 100 through the synchronous driving control module 230. The current control module 220 is configured to adjust the driving currents of the plurality of LED lamps 21 according to the driving current adjustment scheme. The synchronous driving control module 230 is configured to control the constant current driving modules 100 to work synchronously according to the driving currents of the LED lamps 21.

For the specific structure, function and beneficial effect of the LED light source assembly provided in this embodiment, refer to the above embodiments, and are not described herein again.

An embodiment of the present application further provides a photoelectric pulse detection device. The photoelectric pulse detection device comprises the LED light source component.

An embodiment of the present application also provides a smart wearable electronic device, which includes the light i but pulse detection apparatus as described above.

The working principle and the beneficial effects of the photoelectric pulse detection device and the intelligent wearable electronic equipment are as described in the above embodiments, and are not repeated here.

Referring to fig. 7, an embodiment of the present application provides a method for controlling an LED light source. The method is used to control the LED light source 20. The LED light source includes a plurality of LED lamps 21. The execution subject of the method can be computer equipment, and can also be the MCU. The method comprises the following steps:

and S10, acquiring the uniformity parameter of the LED light source 20. The uniformity parameter characterizes the uniformity of the light intensity of the LED light source 20.

And S20, determining a driving current adjusting scheme for the plurality of LED lamps 21 according to the uniformity parameter. Wherein the driving current adjusting scheme comprises the number of the LED lamp 21 requiring driving current adjustment and the adjustment value of the LED lamp 21 requiring driving current adjustment.

S30, adjusting the driving currents of the LED lamps 21 according to the driving current adjustment scheme.

The specific adjustment process of the LED light source control method can be seen in the above embodiments. In this embodiment, the uniformity parameter of the LED light source 20 is obtained, and the driving current adjustment scheme for the LED lamps 21 is determined according to the uniformity parameter. And further adjusting the driving current of the plurality of LED lamps 21 according to the driving current adjusting scheme, so that the light emitting intensity of each LED lamp 21 in the LED light source 20 can be adjusted in real time, the LED light source 20 emits light uniformly, and the light emitting effect is improved.

Referring to fig. 8, in one embodiment, S20 includes:

s210, determining the light intensity of each LED lamp 21 according to the uniformity parameter.

S220, determining the driving current adjustment scheme according to the light intensity of each LED lamp 21.

In fig. 9, in one embodiment, S220 includes:

and S221, comparing the light intensity of each LED lamp 21 with a corresponding preset light intensity threshold value.

S222, when the light intensity of the LED lamp 21 is not equal to the corresponding preset light intensity threshold, acquiring the number of the LED lamp 21, and determining the adjustment value of the LED lamp 21 according to the light intensity of the LED lamp 21 and the corresponding preset light intensity threshold.

The preset light intensity threshold may be set for each of the LED lamps 21 according to the difference of the LED light sources 20. When the light intensity of the LED lamp 21 is equal to the preset light intensity threshold corresponding thereto, it indicates that the LED lamp 21 does not need to be adjusted. When the light intensity of the LED lamp 21 is not equal to the preset light intensity threshold corresponding to the light intensity, it indicates that the LED lamp 21 needs to adjust the driving current, so that the LED light source 20 emits light uniformly. The specific adjustment value of the driving current of the LED lamp 21 is calculated according to the current light intensity of the LED lamp 21 and the corresponding preset light intensity threshold. For example, according to the uniformity parameter, the light intensity of the LED lamp 21 numbered (1, 1) is 5. The preset light intensity threshold of the LED lamp 21 numbered (1, 1) is 4. The driving current of the LED lamp 21 numbered (1, 1) needs to be adjusted. The adjusting value of the driving current can be determined according to the light intensity (5) and the preset light intensity threshold (4) and the corresponding relation between the preset light intensity adjustment and the driving current. After adjustment, the light intensity of the LED lamp 21 numbered (1, 1) is 4.

In this embodiment, the light intensity of each LED lamp 21 is determined according to the uniformity parameter, and the light intensity of each LED lamp 21 is compared with a corresponding preset light intensity threshold. When the light intensity of the LED lamp 21 is not equal to the corresponding preset light intensity threshold value, the serial number of the LED lamp 21 is obtained, and the adjustment value of the LED lamp 21 is determined according to the light intensity of the LED lamp 21 and the corresponding preset light intensity threshold value. The method provided by the embodiment can accurately obtain the adjustment value of the driving current of each LED lamp 21, thereby realizing the adjustment of the light intensity of each LED lamp 21 and further effectively improving the light-emitting uniformity of the LED light source 20.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An LED light source control apparatus for controlling an LED light source (20) including a plurality of LED lamps (21), the LED light source control apparatus comprising:

the constant current driving modules (100) are respectively electrically connected with the LED lamps (21) and used for driving the LED lamps (21), wherein the number of the constant current driving modules (100) is consistent with that of the LED lamps (21);

the control module (200) comprises a uniformity processing module (210) and a current control module (220), the uniformity processing module (210) is electrically connected with the current control module (220), and the current control module (220) is electrically connected with the constant current driving modules (100) respectively; the uniformity processing module (210) is used for receiving uniformity parameters of the LED light source (20) and determining a driving current adjusting scheme for the plurality of LED lamps (21) according to the uniformity parameters; the current control module (220) is used for adjusting the driving current of the plurality of LED lamps (21) according to the driving current adjusting scheme;

the control module (200) further comprises:

the current control module (220) is electrically connected with the constant current driving modules (100) through the synchronous driving control module (230), the synchronous driving control module (230) is used for controlling the constant current driving modules (100) to work synchronously according to the driving currents of the LED lamps (21), and the synchronous driving control module (230) is a field programmable gate array.

2. The LED light source control device according to claim 1, wherein the constant current driving module (100) comprises:

a constant current control module (110) electrically connected to the LED lamp (21);

the digital-to-analog conversion module (120) is electrically connected with the constant current control module (110) and the synchronous drive control module (230) and is used for converting a digital signal into an analog signal;

the LED light source control device further comprises a plurality of analog-to-digital conversion modules (300), wherein the analog-to-digital conversion modules are respectively electrically connected with the constant current control module (110), and are electrically connected with the synchronous driving control module (230) and used for converting analog signals into digital signals.

3. The LED light source control apparatus according to claim 1, further comprising:

the constant temperature device (400) is arranged at the bottom of the LED light source (20) and used for adjusting the temperature of the LED light source (20) and keeping the temperature of the LED light source (20) constant.

4. LED light source control device according to claim 3, characterized in that the thermostat (400) comprises:

the temperature adjusting component (410) is arranged at the bottom of the LED light source (20) and is used for adjusting the temperature of the LED light source (20);

the temperature detection assembly (420) is arranged at the bottom of the LED light source (20) and is used for detecting the temperature of the LED light source (20);

a temperature adjustment driving module (430) electrically connected with the temperature adjustment assembly (410);

the control module (200) further comprises a temperature control module (240), and the temperature control module (240) is electrically connected with the temperature regulation driving module (430) and the temperature detection assembly (420);

the temperature control module (240) is used for outputting a control signal to the temperature regulation driving module (430) according to a preset temperature and the temperature detected by the temperature detection component (420);

the temperature adjusting driving module (430) is used for driving the temperature adjusting component (410) to work according to the control signal output by the temperature control module (240), so that the temperature of the LED light source (20) is kept constant.

5. The LED light source control device according to claim 4, wherein the temperature regulation assembly (410) is a semiconductor refrigerator.

6. The LED light source control apparatus according to claim 1, further comprising:

the photoelectric detection device (500) is used for detecting a light intensity signal of the LED light source (20) and converting the light intensity signal into a light intensity electric signal;

the control module (200) further comprises a light intensity alarm module (250), the light intensity alarm module (250) is electrically connected with the photoelectric detection device (500), the light intensity alarm module (250) is used for comparing the light intensity electric signal with a preset threshold value, and when the light intensity electric signal is larger than the preset threshold value, an alarm signal is output.

7. An LED light source assembly, comprising:

an LED light source (20) comprising a plurality of LED lamps (21);

the LED light source control device (10) comprises a plurality of constant current driving modules (100), a control module (200) and a constant temperature device (400);

the plurality of constant current driving modules (100) are respectively electrically connected with the plurality of LED lamps (21) and used for driving the plurality of LED lamps (21), wherein the number of the constant current driving modules (100) is consistent with that of the LED lamps (21);

the constant temperature device (400) is arranged at the bottom of the LED light source (20) and is used for adjusting the temperature of the LED light source (20) and keeping the temperature of the LED light source (20) constant;

the control module (200) comprises a uniformity processing module (210), a current control module (220) and a synchronous drive control module (230), wherein the uniformity processing module (210) is electrically connected with the current control module (220), and the uniformity processing module (210) is used for receiving uniformity parameters of the LED light source (20) and determining a drive current adjustment scheme for the plurality of LED lamps (21) according to the uniformity parameters; the current control module (220) is electrically connected with the constant current driving modules (100) through the synchronous driving control module (230), and the current control module (220) is used for adjusting the driving currents of the LED lamps (21) according to the driving current adjusting scheme; the synchronous drive control module (230) is used for respectively controlling the constant current drive modules (100) to synchronously work according to the drive currents of the LED lamps (21); the synchronous drive control module (230) is a field programmable logic gate array.

8. Photoelectric pulse detection device, comprising the LED light source assembly according to claim 7.

9. A control method of an LED light source control device according to any one of claims 1-6 for controlling an LED light source (20) comprising a plurality of LED lamps (21), characterized in that the method comprises:

obtaining a uniformity parameter of the LED light source (20), the uniformity parameter characterizing uniformity of light intensity of the LED light source (20);

determining a driving current adjustment scheme for the plurality of LED lamps (21) according to the uniformity parameter, wherein the driving current adjustment scheme comprises the number and the adjustment value of the LED lamp (21) needing to adjust the driving current;

and adjusting the driving current of the plurality of LED lamps (21) according to the driving current adjusting scheme, and enabling the plurality of LED lamps (21) to work synchronously.

10. The control method of claim 9, wherein said determining a drive current adjustment scheme for said plurality of LED lamps (21) based on said uniformity parameter comprises:

determining the light intensity of each LED lamp (21) according to the uniformity parameter;

comparing the light intensity of each LED lamp (21) with a corresponding preset light intensity threshold value;

when the light intensity of the LED lamp (21) is not equal to the corresponding preset light intensity threshold value, the serial number of the LED lamp (21) is obtained, and the adjusting value of the LED lamp (21) is determined according to the light intensity of the LED lamp (21) and the corresponding preset light intensity threshold value.