Illumination device

Abstract

To provide a lighting device.SOLUTION: A lighting device includes a driving power source, a first lamp row, a second lamp row, a constant current controller, and a pulse width modulation controller. The driving power supply is used for providing DC driving current to a shunting node. The first lamp row is electrically connected between the shunt node and a ground terminal and is driven by first pulsating direct current. The second lamp row is electrically connected to the shunt node and is driven by second pulsating DC current. The second lamp row and the constant current controller are electrically connected in series between the shunt node and the ground terminal. The pulse width modulation controller is used for providing a pulse signal to the constant current controller, and the constant current controller controls a pulsation frequency of the second pulsating direct current provided to the second lamp row based on the pulse signal.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present application relates to a lighting device, and particularly to a lighting device having a flashing function.

Background Art

[0002] Currently, lighting is closely related to human life. Good lighting can improve the quality of human life. In some cases, in order to meet specific needs, the stimulation of visible flashing light is required. However, in an environment of visible flashing light, human vision is easily fatigued, increasing the stress on the visual system. As a result, working, studying, or living in a flashing light environment for a long time may cause effects such as dizziness, increased eye pressure, and / or decreased vision. Therefore, how to provide a lighting device to solve the above problems is an important issue in the art.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The present disclosure provides a lighting device. The lighting device includes a driving power source that provides a DC driving current to a shunt node, a first lamp string that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, a second lamp string that is electrically connected to the shunt node and is driven by a second pulsating DC current, a constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp string, and a pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls the pulsating frequency of the second pulsating DC current provided to the second lamp string based on the pulse signal.

Means for Solving the Problems

[0004] In some embodiments, the pulsating frequency of the second pulsating DC current is lower than 80 Hz, and the pulsating frequency of the first pulsating DC current is equal to the pulsating frequency of the second pulsating DC current.

[0005] In some embodiments, the first pulsating direct current and the second pulsating direct current are out of phase by 180 degrees, and the maximum width value and the minimum width value of the second pulsating direct current are set within the range of 0 to 1 times the width value of the direct current driving current.

[0006] In some embodiments, the lighting device further includes a lamp board. A plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are on the lamp board. These first light-emitting elements are installed in the outer peripheral region of the lamp board, and these second light-emitting elements are installed in the central region of the lamp board.

[0007] In some embodiments, the lighting device further includes a lamp board, and a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged on the lamp board.

[0008] In some embodiments, the lighting device further includes a lamp board, and a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged in a checkerboard pattern on the lamp board.

[0009] In some embodiments, the lighting device further includes a third lamp row connected between the driving power source and the shunt node and driven by the direct current driving current.

[0010] In some embodiments, the lighting device further includes a lamp board, a plurality of first light-emitting elements of the first lamp row, a plurality of second light-emitting elements of the second lamp row, and a plurality of third light-emitting elements of the third lamp row are arranged on the lamp board, and these second light-emitting elements, these first light-emitting elements, and these third light-emitting elements are arranged in order from the center of the lamp board to the outside of the lamp board.

[0011] In some embodiments, the lighting device further includes a lamp board, a plurality of third light-emitting elements of the third lamp row are arranged outside the lamp board, and a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged in a checkerboard pattern in the central region of the lamp board.

[0012] In some embodiments, the lighting device further includes a lamp board, and a plurality of first light-emitting elements in the first lamp row, a plurality of second light-emitting elements in the second lamp row, and a plurality of third light-emitting elements in the third lamp row are alternately arranged in a checkerboard pattern on the lamp board.

[0013] In some embodiments, the driving power source controls the width value of the DC driving current. The constant current controller is further used to control the maximum width value and the minimum width value of the second pulsating DC current, and the first pulsating DC current is determined based on the DC driving current and the second pulsating DC current.

[0014] In some embodiments, the ratio of the radiation output of the first lamp row to the radiation output of the second lamp row is in the range of 1:1 to 100:1.

Advantages of the Invention

[0015] As described above, the lighting device of the present disclosure controls the pulsation frequency of the second pulsating DC current provided to the second lamp row, so that the second lamp row emits flashing light, thereby achieving specific requirements (for example, treating, preventing or improving specific diseases or symptoms). Further, the DC driving current is a constant current, the first pulsating DC current and the second pulsating DC current are shunted from the DC driving current, the first pulsating DC current flowing through the first lamp row and the second pulsating DC current are out of phase by 180 degrees, and the first lamp row is driven using the first pulsating DC current, and further improves the degree of human visual perception of the flashing light of the second lamp row.

Brief Description of the Drawings

[0016] To make the above and other objects, features, advantages and embodiments of the present disclosure clearer and easier to understand, the accompanying drawings are described as follows.

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Mode for Carrying Out the Invention

[0017] Examples will be given below and described in detail with reference to the accompanying drawings. However, the provided examples are not intended to limit the scope included in the present disclosure, and the description of the structure and operation is not intended to limit the order of execution. Any structure in which elements are recombined, any device that is generated and has an equivalent effect is within the scope included in the present disclosure. Note that the drawings are for illustrative purposes only and are not drawn to actual dimensions. For ease of understanding, the same or similar elements in the following description are denoted by the same reference numerals. The terms used throughout the specification and the scope of the patent application generally have the general meaning in which each term is used in the art, the general meaning in the content disclosed herein and the special content, unless otherwise specified. Also, the terms used in this specification, such as "comprising", "including", "having", "containing", etc., are all open terms, that is, they mean "including but not limited to". Also, "and / or" used in this specification includes any one or more of the related listed items and all combinations thereof.

[0018] Referring to FIG. 1, FIG. 1 is a schematic diagram of a lighting device 100 according to an embodiment of the present disclosure. As shown in FIG. 1, the lighting device 100 includes a drive power source 110, a lighting module 120, and a lamp cover LS. In some embodiments, the lighting module 120 is a light-emitting diode lighting module. In some embodiments, the lighting module 120 and the lamp cover LS and / or the lamp base constitute a lamp fixture, and the lamp fixture may be a recessed lamp, a table lamp, a floor lamp, or other types of lamp fixtures. In some embodiments, the drive power source 110 is a light-emitting diode driver. In some embodiments, the drive power source 110 may be used as a voltage converter. In some embodiments, the drive power source 110 is electrically connected to the power supply EPS, whereby the alternating current power AC or direct current power DC provided by the power supply EPS is converted into a direct current drive current I driIt is converted to drive the lighting module 120 to emit light. In some embodiments, the driving power supply 110 has a constant current control function to provide a direct current driving current I to the lighting module 120 dri to adjust the width value. In some embodiments, the power supply EPS may be implemented as a commercial power supply, a battery, or other power supply.

[0019] Referring to FIGS. 1 and 2, FIG. 2 is a schematic diagram of a lighting device 200 according to an embodiment of the present disclosure. As shown in FIG. 2, the lighting device 200 includes a driving power supply 210, a lamp board 224, a dimming circuit 226, and light emitting elements L1 and L2. In some embodiments, the light emitting elements L1 and L2 are light emitting diodes. In some embodiments, the light emitting elements L1 and L2 are light emitting diode chips. In some embodiments, the lamp board 224 may be implemented as a printed circuit board. In some embodiments, the lamp board 224 may be implemented as a light emitting diode printed circuit board. In some embodiments, the light emitting elements L1 and L2 and the dimming circuit 226 are mounted on the lamp board 224, and the lamp board 224 supplies power to the light emitting elements L1 and L2, thereby operating the above elements and / or components as an independent device lighting module 220. In some embodiments, the operating modes of the driving power supply 210 and the lighting module 220 correspond to the operating modes of the driving power supply 110 and the lighting module 120 in FIG. 1 respectively, and will not be described further herein.

[0020] In some embodiments, a part of the lamp board 224 for mounting the light emitting element L2 is defined as a light emitting diode block Bf, and the brightness and frequency of the blinking light emitted by the light emitting diode block Bf are controlled by the dimming circuit 226. In some embodiments, the dimming circuit 226 has functions of constant current control and pulse width modulation strobe control, and the dimming circuit 226 is used to control the light emitting element L2 in the light emitting diode block Bf to emit blinking light.

[0021] In some embodiments, another part of the lamp plate 224 for mounting the light-emitting element L1 is defined as the light-emitting diode block Bfa, and the light-emitting diode block Bfa emits a blinking light that is 180 degrees out of phase with the blinking light emitted by the light-emitting diode block Bf.

[0022] In some embodiments, the light-emitting elements L1 and L2 arranged on the lamp plate 224 are white light-emitting diodes such that the light-emitting diode block Bf on the lamp plate 224 emits white blinking light, and the light-emitting diode block Bfn emits white blinking light that is 180 degrees out of phase with the white blinking light emitted by the light-emitting diode block Bf. In some embodiments, the color temperature of the white light-emitting diode is in the range of 2700K to 6500K, but the color temperature is not limited thereto. In some other embodiments, the color temperature of the white light-emitting diode may be designed to be lower than 2700K or higher than 6500K according to special requirements.

[0023] In some other embodiments, one of the light-emitting elements L1 and L2 is a white light-emitting diode, and the other of the light-emitting elements L1 and L2 is a single-color light-emitting diode, so that the lamp plate 224 emits a mixed light of white flashing light and single-color flashing light, and the white flashing light and the single-color flashing light are out of phase by 180 degrees. In some embodiments, the single-color light-emitting diode has a specific peak wavelength / light spectrum range, thereby providing a corresponding therapeutic effect to the user based on the specific light spectrum range of the single-color light-emitting element. For example, the single-color light-emitting diode may be implemented as a red light diode, a near-infrared light diode or a far-infrared light diode, and emits light in the light spectrum range of red light, near-infrared light or far-infrared light, thereby preventing / improving symptoms such as retinal inflammation and vision degradation. Further, for example, the single-color light-emitting diode may be implemented as a green light diode, and emits light in the light spectrum range of green light, thereby preventing / improving diseases such as glaucoma. In some other embodiments, the single-color light-emitting diode is a blue light-emitting diode. The above single-color light-emitting diode is only an example, and the content of the present disclosure is not limited thereto.

[0024] FIG. 3 is a schematic diagram of the functional blocks of the lighting device 200 according to an embodiment of the present disclosure. As shown in FIG. 3, a plurality of light-emitting elements L1 are connected in series to form a lamp string 1, and a plurality of light-emitting elements L2 are connected in series to form a lamp string 2.

[0025] In some embodiments, the anodes of the lamp strings 1 and 2 are electrically connected to the shunt node N1, and the cathode of the lamp string 1 is grounded. In some embodiments, the dimming circuit 226 is electrically connected between the cathode of the lamp string 2 and the ground terminal. That is, the lamp string 2 and the dimming circuit 226 are electrically connected in series between the shunt node N1 and the ground terminal.

[0026] In some embodiments, a direct current drive current I dri is provided to the shunt node N1, and the output terminal of the drive power supply 210 is electrically connected to the shunt node N1. In some embodiments, a direct current drive current Idri is the pulsating direct current I flowing through the lamp string 1 p1 and the pulsating direct current I flowing through the lamp string 2 p2 are shunted at the shunt node N1. In some embodiments, the pulsating direct current I flowing through the lamp string 2 p2 is controlled by the dimming circuit 226, and the pulsating direct current I flowing through the lamp string 1 p1 is the direct current drive current I dri and the pulsating direct current I p2 is generated based on the difference therebetween.

[0027] In some embodiments, the dimming circuit 226 includes a pulse width modulation controller PWM and a constant current controller CC. In some embodiments, the pulse width modulation controller PWM is used to generate a low-frequency pulse signal S PWM and provide it to the constant current controller CC. In some embodiments, the constant current controller CC has a constant current control function and / or a pulse width modulation function, and the constant current controller CC causes the lamp string 2 to emit a light beam that blinks at a low frequency based on the pulsating direct current I p2 so as to control the pulsating frequency and width value of the pulsating direct current I PWM flowing through the lamp string 2 based on the pulse signal S p2 .

[0028] In some embodiments, the low-frequency blinking light beam emitted by the lamp string 2 described above is used to prevent, improve, and / or treat a specific disease (for example, Alzheimer's disease) or symptom (for example, attention deficit, autonomic nervous disorder, or other symptoms). In some embodiments, the low frequency of the blinking light beam for a specific use emitted by the lamp string 2 is a frequency that can be perceived by humans, for example, a frequency of 80 Hz or less. Therefore, so that the lamp string 2 emits a low-frequency blinking light beam that prevents, improves, and / or treats a specific disease / symptom, the pulsating frequency of the pulse signal S PWM and the pulsating direct current I p2 may be set to 80 Hz or less.

[0029] In some other embodiments, stimulation by a light beam of 40 Hz can prevent, ameliorate, and / or treat certain degenerative nerve diseases, such as Alzheimer's disease. Therefore, the pulse signal S PWM and the pulsating direct current I p2 may be set to 40 Hz in terms of pulsating frequency.

[0030] In some further embodiments, the blinking frequency of the blinking light beam emitted by the lamp array 2 may be set based on the frequencies of human brain waves (such as alpha waves (e.g., 8 Hz to 14 Hz), beta waves (e.g., 12.5 Hz to 28 Hz), gamma waves (e.g., 25 Hz to 100 Hz), etc.), thereby synchronizing the stimulation by the light beam with the activity rhythm of human brain cells, and further bringing about improvements in human concentration, stabilization of emotions, reduction of stress, and / or enhancement of consciousness. Therefore, the frequency of the low-frequency blinking light beam emitted by the lamp array 2, the pulse signal S PWM and / or the pulsating frequency of the pulsating direct current I p2 may be implemented as other desired frequencies, and the present application is not limited thereto.

[0031] However, the lamp string 1 refers not to the arrangement form on the lamp board 224 of the non-light-emitting element L1, but to the electrical series relationship in the circuit of the light-emitting element L1, and the lamp string 2 refers not to the arrangement form on the lamp board 224 of the non-light-emitting element L2, but to the electrical series relationship in the circuit of the light-emitting element L2. In some embodiments, the light-emitting elements L1 of the lamp string 1 and the light-emitting elements L2 of the lamp string 2 may be arranged on the lamp board 224 in a plurality of different forms. In some embodiments, one or more lamp strings 1 and one or more lamp strings 2 may be arranged on the lamp board 224. In some embodiments, a plurality of lamp strings 1 and one lamp string 2 are arranged on the lamp board 224, and the plurality of lamp strings 1 are connected in parallel between the shunt node N1 and the ground terminal. In some embodiments, a plurality of lamp strings 1 and a plurality of lamp strings 2 are arranged on the lamp board 224, and the plurality of lamp strings 2 are connected in parallel between the shunt node N1 and the constant current controller CC. The number of the lamp strings 1 and 2 arranged on the lamp board 224 is only an example, and the content of the present disclosure is not limited thereto.

[0032] Referring back to FIG. 2, the light-emitting elements L1 and L2 are arranged in order from the center of the lamp board 224 to the outside of the lamp board 224. In the embodiment of FIG. 2, the light-emitting diode block Bfa for mounting the light-emitting element L1 is at the central portion of the lamp board 224, and the light-emitting diode block Bf for mounting the light-emitting element L2 is at the outer peripheral portion of the lamp board 224. That is, the light-emitting element L1 is installed in the central region of the lamp board 224 and the light-emitting element L2 is installed in the outer peripheral region of the lamp board 224 so that the light-emitting element L2 surrounds the light-emitting element L1.

[0033] In some embodiments, the light-emitting elements L2 and L1 are arranged in order from the center of the lamp plate to the outside of the lamp plate. That is, the light-emitting element L2 is installed in the central region of the lamp plate 224, and the light-emitting element L1 is installed in the outer peripheral region of the lamp plate 224. In this way, the light-emitting element L2 is surrounded by the light-emitting element L1. In some embodiments, in the lamp plate, the number of the light-emitting elements L1 is larger than the number of the light-emitting elements L2 (for example, the number of the lamp rows 1 is larger than the number of the lamp rows 2), and the pulsating direct current I p1 provided to the light-emitting element L1 max1 has a smaller difference between the maximum width value A min1 and the minimum width value A

[0034] than that of the light-emitting element L2, so that the light-emitting element L1 has a smaller stroboscopic fluctuation width value of the radiation output, and the ratio of the overall radiation output of the light-emitting element L1 to the overall radiation output of the light-emitting element L2 increases, and further, it becomes more difficult for the human vision to perceive the flickering. In this case, by arranging the light-emitting elements L1 so as to surround the light-emitting element L2, the hardly perceivable, flickering / stroboscopic light rays emitted by the light-emitting element L1 surround the flickering light rays emitted by the light-emitting element L2, and it becomes more difficult for the human vision to perceive the flickering in the radiation output of the lamp plate. As a result, the lighting device 100 can be used as a general-purpose lighting device. In this way, the lighting device 100 can be used as a general-purpose lighting device for improving concentration / preventing specific diseases.

[0035] In some embodiments, the light-emitting elements L1 and L2 are alternately arranged on the lamp plate. In some embodiments, the light-emitting elements L1 and L2 are alternately arranged in a checkerboard pattern on the lamp plate.

[0036] In some embodiments, the light-emitting elements L1 and L2 are alternately arranged in rows on the lamp plate.

[0037] Referring to FIGS. 3, 4A, and 4B, FIGS. 4A and 4B show the DC drive current I of an embodiment of the present disclosuredri and pulsating direct current I p1 and I p2 is a schematic diagram. As shown in FIGS. 4A to 4B, the direct current drive current I dri output by the drive power supply 210 is a constant current and is the pulsating direct current I flowing through the lamp string 1 p1 and the pulsating direct current I flowing through the lamp string 2 p2 changes periodically with time t0 to t8.

[0038] In some embodiments, the constant current controller CC controls the pulsating frequency of the pulsating direct current I p2 so as to be in phase with the pulse signal S PWM based on the pulse signal S PWM of the pulsating direct current I p2 In some embodiments, according to Kirchhoff's current law, the sum of the pulsating direct current I flowing through the lamp string 1 p1 and the pulsating direct current I flowing through the lamp string 2 p2 is substantially equal to the direct current drive current I dri and the direct current drive current I dri is a constant current, whereby the pulsating direct current I p2 and the pulsating direct current I p1 are out of phase by 180 degrees. In some embodiments, the pulsating direct current I p1 and the pulsating direct current I p2 are out of phase by 180 degrees, and since the lamp string 1 driven by the pulsating direct current I p1 can compensate for the brightness of the lamp string 2, the overall radiation output of the lighting module 220 is not zero at each time point, and further provides a low-frequency blinking stimulus, reduces the sensitivity of the human visual system to the blinking light rays emitted by the lamp string 2, and further improves the stimulus to the blinking light and the stress on the human visual system.

[0039] In some embodiments, the constant current controller CCs is the maximum width value A p2 of the pulsating direct current I max2 and the minimum width value A min2It can be controlled and / or adjusted to adjust the stimulation intensity of the flashing light emitted by the lamp string 2. In some embodiments, the pulsating direct current I p2 The maximum width value A max2 And the minimum width value A min2 Is set within the range of 0 to 1 times the width value A dri Of the direct current drive current I dri In some embodiments, the pulsating direct current I p2 The maximum width value A max2 Is greater than 0 and the width value A dri Of the direct current drive current I dri May be set to a value in a range smaller than. In some embodiments, the pulsating direct current I p2 The minimum width value A min2 May be 0 amperes. In some other embodiments, the pulsating direct current I p2 The minimum width value A min2 Is greater than 0 amperes and the maximum width value A max2 May be a value smaller than.

[0040] In some embodiments, the maximum width value A p1 Of the pulsating direct current I max1 Is the difference between the width value A dri Of the direct current drive current I dri And the minimum width value A p2 Of the pulsating direct current I min2 In some embodiments, the minimum width value A p1 Of the pulsating direct current I min1 Is the difference between the width value A dri Of the direct current drive current I dri And the maximum width value A p2 Of the pulsating direct current I max2

[0041] In some embodiments, the period of the pulsating direct current I p1 Corresponds to the period of the pulsating direct current I p2 That is, the pulsation frequency of the pulsating direct current I p1 Is equal to the pulsation frequency of the pulsating direct current I p2

[0042] In some embodiments, the pulsating direct current I p2 ​​The duty cycle (the ratio of the high potential time (for example, time t1 to t2) to the cycle time (for example, time t0 to t2)) does not change with time. That is, the pulsating direct current I p2 The duty cycle is set to a constant value. Accordingly, the duty cycle of the pulsating direct current I p1 is also constant.

[0043] Referring to FIG. 5, FIG. 5 is a schematic diagram of an illumination device 300 according to an embodiment of the present disclosure. The illumination device 300 includes a drive power source 310, a lamp board 324, a dimming circuit 326, and light emitting elements L1, L2, and L3. In some embodiments, the light emitting elements L1, L2, and L3 are light emitting diodes. In some embodiments, the operating modes of the drive power source 310, the light emitting elements L1, L2, L3, and the dimming circuit 326 in FIG. 6A respectively correspond to the operating modes of the drive power source 310, the light emitting elements L1, L2, L3, and the dimming circuit 326 in FIG. 5. In some embodiments, the light emitting elements L1, L2, and L3 are light emitting diode chips. In some embodiments, the lamp board 324 may be implemented as a printed circuit board. In some embodiments, the lamp board 324 may be implemented as a light emitting diode printed circuit board. In some embodiments, the light emitting elements L1, L2, L3, and the dimming circuit 326 are mounted on the lamp board 324, and the lamp board 324 supplies power to the light emitting elements L1 and L2, thereby operating the above elements and / or components as an illumination module 320 of an independent device. In some embodiments, the operating modes of the drive power source 310 and the dimming circuit 226 respectively correspond to the operating modes of the drive power source 210 and the dimming circuit 326 in FIG. 2, which will not be described further herein.

[0044] In some embodiments, the total number of the light emitting elements L1 and L2 of the illumination device 300 is less than or equal to the total number of the light emitting element L3 of the illumination device 300.

[0045] In some embodiments, the sum of the radiation output / total radiation output ratios of the light emitting elements L1 and L2 of the illumination device 300 is less than or equal to the radiation output / total radiation output ratio of the light emitting element L3 of the illumination device 300.

[0046] In some embodiments, some of the lamp plates 224 for mounting the light-emitting element L2 are defined as the light-emitting diode block Bf, and the brightness and frequency of the blinking light rays emitted by the light-emitting diode block Bf are controlled by the dimming circuit 326. In some embodiments, the dimming circuit 326 has the functions of constant current control and pulse width modulation strobe control, and the dimming circuit 326 is used to control the light-emitting element L2 in the light-emitting diode block Bf so as to emit blinking light.

[0047] In some embodiments, another part of the lamp plate 324 for mounting the light-emitting element L1 is defined as the light-emitting diode block Bfa, and the light-emitting diode block Bfa is used to emit blinking light that is 180 degrees out of phase with the blinking light emitted by the light-emitting diode block Bf.

[0048] In some embodiments, yet another part of the lamp plate 324 for mounting the light-emitting element L3 is defined as the light-emitting diode block Bfn, and the light-emitting diode block Bfn is used to emit light rays without visible blinking. In this way, the overall radiation output of the lighting device 300 can be maintained above a certain value, thereby improving the stress on the human vision caused by the light rays that blink in the bright and dark states when the light-emitting element L2 emits light.

[0049] In some embodiments, in the lighting device 300, the ratio between the radiation output of the light-emitting diode block Bfn for emitting visible blinking light and the radiation output of the light-emitting diode block Bf for emitting non-visible blinking light may be set within the range of 1:1 to 1:100.

[0050] In some embodiments, all of the light-emitting elements L1, L2, and L3 disposed on the lamp panel 324 are white light-emitting diodes so that the lamp panel 324 emits a mixed light of non-blinking white light and white blinking light. In some embodiments, the color temperature of the white light-emitting diode is in the range of 2700K to 6500K, but the color temperature is not limited thereto. In some other embodiments, the color temperature of the white light-emitting diode may be designed to be lower than 2700K or higher than 6500K according to special requirements.

[0051] In some embodiments, the light-emitting elements L1, L2, and L3 disposed on the lamp panel 324 include at least one white light-emitting diode and at least one single-color light-emitting diode. The single-color light-emitting diode has a specific peak wavelength / light spectrum range, thereby providing a corresponding therapeutic effect to the user based on the specific light spectrum range of the single-color light-emitting diode. For example, the single-color light-emitting diode may be implemented as a red light diode, a near-infrared light diode, or a far-infrared light diode, and emits light in the light spectrum range of red light, near-infrared light, or far-infrared light, thereby preventing / improving symptoms such as retinal inflammation and vision degradation. Further, for example, the single-color light-emitting diode may be implemented as a green light diode and emits light in the light spectrum range of green light, thereby preventing / improving diseases such as glaucoma. In some other embodiments, the single-color light-emitting diode is a blue light-emitting diode. The light spectrum range of the single-color light-emitting diode is only an example, and the content of the present disclosure is not limited thereto.

[0052] In some embodiments, the light-emitting element L3 disposed on the lamp panel 324 is a white light-emitting diode, and the light-emitting element L1 or the light-emitting element L2 disposed on the lamp panel 324 is a monochromatic light-emitting diode, so that the lamp panel 324 emits a mixed light of non-flashing white light and monochromatic flashing light. In some embodiments, the light-emitting elements L2 and L3 disposed on the lamp panel 324 are white light-emitting diodes, the light-emitting element L1 disposed on the lamp panel 324 is a monochromatic light-emitting diode, and the total radiation output of the white light-emitting diodes is greater than the total radiation output of the monochromatic light-emitting diode, so that the lamp panel 324 emits a mixed light of bright white light and dim monochromatic flashing light. In some embodiments, the light-emitting elements L1 and L3 disposed on the lamp panel 324 are white light-emitting diodes, the light-emitting element L2 disposed on the lamp panel 324 is a monochromatic light-emitting diode, and the total radiation output of the white light-emitting diodes is greater than the total radiation output of the monochromatic light-emitting diode, so that the lamp panel 324 emits a mixed light of bright white light and dim monochromatic flashing light. In some embodiments, the light-emitting element L3 disposed on the lamp panel 324 is a white light-emitting diode, and both the light-emitting elements L1 and L2 disposed on the lamp panel 324 are monochromatic light-emitting diodes, so that the lamp panel 324 emits a mixed light of non-flashing white light and monochromatic light that flashes out of phase. In some embodiments, the light-emitting element L3 disposed on the lamp panel 324 is a monochromatic light-emitting diode, and the light-emitting element L1 or L2 disposed on the lamp panel 324 is a white light-emitting diode, so that the lamp panel 324 emits a mixed light of non-flashing monochromatic light and flashing white light. The above are only examples, and the content of the present disclosure is not limited thereto.

[0053] Referring to FIGS. 5 and 6A, FIG. 6A is a schematic diagram of the functional blocks of an illumination device 300a according to an embodiment of the present disclosure. As shown in FIG. 6A, the illumination device 300a includes a driving power source 310, a plurality of light-emitting elements L3, a light-emitting element L1, a light-emitting element L2, and a dimming circuit 326, and the plurality of light-emitting elements L3 are connected in series to form a lamp string 3.

[0054] In some embodiments, the anodes of the lamp string 3 are electrically connected to the output terminals of the driving power source 310, the cathodes of the lamp string 3 are electrically connected to the shunt node N1, and a DC driving current I provided by the driving power source 310 dri is used to emit a light beam without visible flickering.

[0055] In some embodiments, the anode of the light-emitting element L1 is electrically connected to the shunt node N1, and the cathode of the light-emitting element L1 is grounded. In some embodiments, the anode of the light-emitting element L2 is electrically connected to the shunt node N1, and the cathode of the light-emitting element L2 is electrically connected to the dimming circuit 326. The light-emitting elements L1, L2 and the dimming circuit 326 of the lighting device 300a are the same as the light-emitting elements L1, L2 and the dimming circuit 226 in the lighting device 200 of FIG. 3 respectively, and will not be described further here. Also, the DC driving current I flowing through the lamp string 3 dri , the pulsating DC current I flowing through the light-emitting element L1 p1 and the pulsating DC current I flowing through the light-emitting element L2 p2 are the same as the DC driving current I dri , the pulsating DC current I p1 and the pulsating DC current I p2 in FIGS. 4A and 4B respectively, and will not be described further here.

[0056] Referring to FIG. 6B, FIG. 6B is a schematic diagram of the functional blocks of a lighting device 300b according to an embodiment of the present disclosure. As shown in FIG. 6B, the lighting device 300b includes a driving power source 310, a lamp string 1 composed of a plurality of light-emitting elements L1, a lamp string 2 composed of a plurality of light-emitting elements L2, a lamp string 3 composed of a plurality of light-emitting elements L3, and a dimming circuit 326. In some embodiments, the operating modes of the driving power source 310, the light-emitting elements L1, L2, L3, and the dimming circuit 326 in FIG. 6B respectively correspond to the operating modes of the driving power source 310, the light-emitting elements L1, L2, L3, and the dimming circuit 326 in FIG. 5.

[0057] Comparing the lighting device 300b in FIG. 6B with the lighting device 300a in FIG. 6A, the difference lies in the number of light-emitting elements L1 and L2. More specifically, the lighting device 300b in FIG. 6B includes a lamp string 1 formed by connecting in series a plurality of light-emitting elements L1 electrically connected between the shunt node N1 and the ground terminal, and a lamp string 2 formed by connecting in series a plurality of light-emitting elements L2 electrically connected between the shunt node N1 and the dimming circuit 326. Therefore, the number of the light-emitting elements L1, L2, and L3 included in the lighting devices 300a and 300b of the present application is not limited thereto. Other detailed connection relationships and operating modes of the lighting device 300b are substantially the same as those of the lighting device 300a in the previous FIG. 6A embodiment, and will not be described further herein.

[0058] Referring to FIG. 7, FIG. 7 is a schematic diagram of a functional block of a lighting device 300c according to an embodiment of the present disclosure. As shown in FIG. 7, the lighting device 300c includes a driving power source 310, a plurality of lamp strings 1[1] to 1[x], a plurality of lamp strings 2[1] to 2[y], a plurality of lamp strings 3[1] to 3[z], and a dimming circuit 326. In some embodiments, the operating modes of the driving power source 310, the light-emitting elements L1, L2, L3, and the dimming circuit 326 in FIG. 7 respectively correspond to the operating modes of the driving power source 310, the light-emitting elements L1, L2, L3, and the dimming circuit 326 in FIG. 5.

[0059] In some embodiments, the anodes of the plurality of lamp strings 3[1] to 3[z] are electrically connected to the output terminals of the driving power source 310, the cathodes of the plurality of lamp strings 3[1] to 3[z] are electrically connected to the shunt node N1, and the plurality of lamp strings 3[1] to 3[z] are respectively driven based on the DC driving currents I dri1 ~I[[ID=!1]] driz . In some embodiments, the sum of the DC driving currents I dri1 ~I driz is the DC driving current I dri .

[0060] In some embodiments, the anodes of the plurality of lamp strings 2[1] to 2[y] are electrically connected to the shunt node N1, the cathodes of the plurality of lamp strings 2[1] to 2[y] are electrically connected to the dimming circuit 326, and the pulsating direct current I flowing through the plurality of lamp strings 2[1] to 2[y] p21 ~I p2y is controlled by the dimming circuit 326. In some embodiments, the dimming circuit 326 includes a voltage generator VG, a pulse width modulation controller PWM, and a constant current controller CC.

[0061] In some embodiments, the voltage generator VG has pins Vin, Vout, and GND. In some embodiments, the pin GND of the voltage generator VG is grounded. In some embodiments, the pin Vin of the voltage generator VG is electrically connected to the output terminal of the driving power supply 310, converts a part of the output of the driving power supply 310 into an operating voltage, and outputs the operating voltage via the pin Vout.

[0062] In some embodiments, the pulse width modulation controller PWM has pins VCC, PWM-out, and GND. In some embodiments, the pin GND of the pulse width modulation controller PWM is grounded. In some embodiments, the pulse width modulation controller PWM receives the operating voltage generated by the voltage generator VG via the pin VCC. In some embodiments, the pulse width modulation controller PWM generates a pulse signal S PWM and is used to output the pulse signal S PWM via the pin PWM-out.

[0063] In some embodiments, the constant current controller CC has pins LED_cath, PWM-in, and GND. In some embodiments, the pin GND of the constant current controller CC is grounded. In some embodiments, the pin PWM-in of the constant current controller CC is used to receive the pulse signal S PWM generated by the pulse width modulation controller PWM. In some embodiments, the pin LED_cath of the constant current controller CC is electrically connected to the cathodes of the lamp strings 2[1] to 2[y], and the pulse signal SPWM Based on this, the pulsating direct current I flowing through the lamp strings 2[1] to 2[y] is controlled. That is, the pulsating frequency and width value of the pulsating direct current I flowing through the lamp strings 2[1] to 2[y] are controlled by the constant current controller CC, so that the lamp strings 2[1] to 2[y] respectively emit visible flashing light based on the pulsating direct current I p21 ~I p2y Based on this, the pulsating frequency and width value of the pulsating direct current I flowing through the lamp strings 2[1] to 2[y] are controlled. That is, the pulsating frequency and width value of the pulsating direct current I flowing through the lamp strings 2[1] to 2[y] are controlled by the constant current controller CC, so that the lamp strings 2[1] to 2[y] respectively emit visible flashing light based on the pulsating direct current I p2 Based on this, the pulsating frequency and width value of the pulsating direct current I flowing through the lamp strings 2[1] to 2[y] are controlled by the constant current controller CC, so that the lamp strings 2[1] to 2[y] respectively emit visible flashing light based on the pulsating direct current I p21 ~I p2y Based on this, the pulsating frequency and width value of the pulsating direct current I flowing through the lamp strings 2[1] to 2[y] are controlled by the constant current controller CC, so that the lamp strings 2[1] to 2[y] respectively emit visible flashing light based on the pulsating direct current I. In some embodiments, the sum of the pulsating direct current I p21 ~I p2y is the pulsating direct current I p2 .

[0064] In some embodiments, the direct current drive current I dri is shunted to the shunt node N1 by the pulsating direct current I p1 and I p2 . According to Kirchhoff's current law, the pulsating direct current I p1 is determined based on the direct current drive current I dri and the pulsating direct current I p2 . In some embodiments, the difference between the direct current drive current I dri and the pulsating direct current I p2 is the width value of the pulsating direct current I p1 . In some embodiments, the anodes of the plurality of lamp strings 1[1] to 1[x] are electrically connected to the shunt node N1, the cathodes of the plurality of lamp strings 1[1] to 1[x] are grounded, and the plurality of lamp strings 1[1] to 1[x] are respectively driven based on the pulsating direct current I p11 ~I p1x . In some embodiments, the sum of the pulsating direct current I p11 ~I p1x is the pulsating direct current I p1 .

[0065] In some embodiments, the anodes of the plurality of lamp strings 3[1] to 3[x] are electrically connected to the output terminals of the drive power supply 310, the cathodes of the plurality of lamp strings 3[1] to 3[x] are electrically connected to the shunt node N1, and the plurality of lamp strings 3[1] to 3[x] are respectively based on the direct current drive current I dri1 ~I drizIt is driven based on this. In some embodiments, the DC drive current I dri1 ~I driz The sum with is the DC drive current I dri is.

[0066] In some embodiments, by controlling the width value of the DC drive current I dri by the drive power supply 310 and controlling the pulsating DC current I p2 by the constant current controller CC, the ratio of the radiation output of the lamp strings 3[1] to 3[x] and the radiation output of the lamp strings 2[1] to 2[y] can be set within the range of 1:1 to 100:1.

[0067] However, each of the lamp strings 1[1] to 1[x] is not the arrangement form on the lamp board 324a of the non-light-emitting element L1, but the electrical series relationship in the circuit of the light-emitting element L1. Each of the lamp strings 2[1] to 2[y] is not the arrangement form on the lamp board 324a of the light-emitting element L2, but the electrical series relationship in the circuit of the light-emitting element L2. Each of the lamp strings 3[1] to 3[z] is not the arrangement form on the lamp board 324a of the non-light-emitting element L3, but the electrical series relationship in the circuit of the light-emitting element L3. In some embodiments, the light-emitting elements L1 of the lamp strings 1[1] to 1[x], the light-emitting elements L2 of the lamp strings 2[1] to 2[y], and the light-emitting elements L3 of the lamp strings 3[1] to 3[z] may be arranged on the lamp board 324a in a plurality of different forms.

[0068] Returning to FIG. 5, the light-emitting elements L1, L2, and L3 are sequentially arranged on the lamp board from the center of the lamp board 324a to the outside of 324a. That is, the light-emitting diode block Bfa for mounting the light-emitting element L1 is the central portion of the lamp board 324a, the light-emitting diode block Bf for mounting the light-emitting element L2 is the inner ring portion of the lamp board 324a, and the light-emitting diode block Bfn for mounting the light-emitting element L3 is the outer ring portion of the lamp board 324a.

[0069] In some embodiments, the light emitting elements L2, L1, and L3 are arranged in order from the center of the lamp plate to the outside of the lamp plate. That is, the light emitting element L2 is installed in the central region of the lamp plate, the light emitting element L3 is installed in the outer peripheral region of the lamp plate, and the light emitting element L1 is installed in the intermediate region between the central region and the outer peripheral region, so that the light emitting elements L3 and L1 surround the light emitting element L2. In some embodiments, the overall radiation output of the light emitting element L3 is greater than the overall radiation output of the light emitting element L2, and the non-flashing light rays emitted by the light emitting element L3 surround the flashing light rays emitted by the light emitting element L2, making it difficult for the human visual sense to perceive the flashing in the radiation output of the lamp plate. In some embodiments, by setting the number of the light emitting elements L1 to be greater than the number of the light emitting elements L2 (for example, the number of the lamp rows 1[1] to 1[x] is greater than the number of the lamp rows 2[1] to 2[y]), the ratio of the overall radiation output of the light emitting element L1 to the overall radiation output of the light emitting element L2 can be increased, the light emitting element L1 has a smaller stroboscopic fluctuation width value for the radiation output, and the ratio of the overall radiation output of the light emitting element L1 to the overall radiation output of the light emitting element L2 is increased, making it even more difficult for the human visual sense to perceive the flashing. In this case, by arranging the light emitting elements L1 and L3 to surround the light emitting element L2, the non-flashing light rays emitted by the light emitting element L3 and the hardly perceivable, flashing / stroboscopic light rays emitted by the light emitting element L1 can surround the flashing light rays emitted by the light emitting element L2, making it difficult for the human visual sense to perceive the flashing in the radiation output of the lamp plate.

[0070] In some further embodiments, the light emitting elements L1, L2, and L3 are arranged on the lamp plate in different array forms. Refer to FIGS. 8 to 17 for the array forms of the light emitting elements L1, L2, and L3 on the lamp plate. Note that FIGS. 8 to 17 are examples, and the light emitting elements L1, L, and L3 may be arranged on the lamp plate in other suitable forms. Therefore, the present application is not limited thereto.

[0071] Figures 8 to 17 are schematic views of the lamp plates 324b to 324j of an embodiment of the present disclosure. In the embodiments of Figures 8 to 17, with respect to the light emitting diode block Bfa, some of the lamp plates are configured to mount a light emitting element L1 for emitting visible blinking light, and with respect to the light emitting diode block Bf, some other lamp plates are configured to mount a light emitting element L2 for emitting visible blinking light. The blinking light emitted by the light emitting element L1 is out of phase by 180 degrees with the blinking light emitted by the light emitting element L2. Also, with respect to the light emitting diode block Bfn, some other lamp plates are configured to mount a light emitting element L3 for emitting non-visible blinking light. In some embodiments, each of the light emitting elements L1, L2, and L3 of the lamp plates 324b to 324j may be implemented as the light emitting elements L1 and L2 in the lighting device 300a and the light emitting element L3 of the lamp row 3, respectively. In some further embodiments, each of the light emitting elements L1, L2, and L3 of the lamp plates 324b to 324j may be implemented as the light emitting elements L1 to L3 of the lamp rows 1 to 3 in the lighting device 300b, respectively. In some other embodiments, each of the light emitting elements L1, L2, and L3 of the lamp plates 324b to 324j may be implemented as the light emitting elements L1 to L3 in the lamp rows 1[1] to 1[x], 2[1] to 2[y], and 3[1] to 3[z] in the lighting device 300c, respectively. Therefore, the present application is not limited thereto.

[0072] As shown in Figure 8, the lamp plate 324b is a circular lamp plate, and the light emitting elements L1, L3, and L2 are arranged in order from the center of the lamp plate 324b to the outside of the lamp plate 324a. That is, the light emitting diode block Bfa for mounting the light emitting element L1 is the central portion of the lamp plate 324b, the light emitting diode block Bfn for mounting the light emitting element L3 is the inner ring portion of the lamp plate 324b, and the light emitting diode block Bf for mounting the light emitting element L2 is the outer ring portion of the lamp plate 324b.

[0073] As shown in FIG. 9, the lamp plate 324c is a rectangular lamp plate, and the light emitting elements L1 and L3 are alternately arranged in a checkered pattern in the central region of the lamp plate 324c, and the light emitting element L2 is arranged in the outer peripheral region / outside of the lamp plate 324c. That is, the light emitting diode blocks Bfa for mounting the light emitting element L1 and the light emitting diode blocks Bfn for mounting the light emitting element L3 are alternately arranged in a checkered pattern, and the light emitting diode blocks Bfa and Bfn are surrounded by the light emitting diode block Bf for mounting the light emitting element L2.

[0074] In some embodiments, by reducing the average luminance of the light emitting element L2, the light emitting element L1 in the central region can have a high average luminance, thereby improving the degree of human visual perception of the switching between the bright state and the dark state of the blinking light of the light emitting element L2. Further, by arranging the light emitting element L3 for emitting non-visible blinking light so as to surround the light emitting element L2 in the central region, the stress on the human visual system due to the stimulation of the blinking light can be further improved.

[0075] In some embodiments, by increasing the average luminance of the light emitting element L2, the stimulation of the blinking light of the light emitting element L2 can be enhanced, and further the specific effect of treating / preventing a specific disease / symptom can be enhanced. Further, by arranging the light emitting element L3 for emitting non-visible blinking light so as to surround the light emitting element L2 in the central region, the stress on the human visual system due to the stimulation of the blinking light can be further improved.

[0076] As shown in FIG. 10, the lamp plate 324d is a rectangular lamp plate, and the lamp plates 324c of the light emitting elements L1 and L2 are alternately arranged in a checkered pattern in the central region, and the light emitting element L3 is arranged in the outer peripheral region / outside of the lamp plate 324d. That is, the light emitting diode blocks Bfa for mounting the light emitting element L1 and the light emitting diode blocks Bf for mounting the light emitting element L2 are alternately arranged in a checkered pattern, and the light emitting diode blocks Bfa and Bf are surrounded by the light emitting diode block Bfn for mounting the light emitting element L3.

[0077] As shown in FIG. 11, the lamp plate 324e is a rectangular lamp plate, and the light-emitting elements L1, L2, and L3 are arranged in order from the center of the lamp plate 324e to the outside of the lamp plate 324e. That is, the light-emitting diode block Bfa for mounting the light-emitting element L1 is at the central portion of the lamp plate 324e, the light-emitting diode block Bf for mounting the light-emitting element L2 is at the inner ring portion of the lamp plate 324e, and the light-emitting diode block Bfn for mounting the light-emitting element L3 is at the outer ring portion of the lamp plate 324e.

[0078] In some embodiments, the light-emitting diode block Bfn for emitting non-visible blinking light surrounds the light-emitting diode block Bf and / or Bfa for emitting visible blinking light, so that the non-blinking light can surround the blinking light, thereby reducing the degree of human visual perception of the blinking light emitted by the light-emitting diode block Bf and / or Bfa, and further improving the stress on the human visual system caused by the stimulation of the blinking light.

[0079] As shown in FIG. 12, the lamp plate 324f is a rectangular lamp plate, and the light-emitting elements L3, L1, and L2 are arranged in order from the center of the lamp plate 324f to the outside of the lamp plate 324f. That is, the light-emitting diode block Bfn for mounting the light-emitting element L3 is at the central portion of the lamp plate 324f, the light-emitting diode block Bfa for mounting the light-emitting element L1 is at the inner ring portion of the lamp plate 324f, and the light-emitting diode block Bf for mounting the light-emitting element L2 is at the outer ring portion of the lamp plate 324f.

[0080] As shown in FIG. 13, the lamp plate 324g is a rectangular lamp plate, and the arrangement form of the light-emitting elements L1, L2, and L3 on the lamp plate 324g is the same as the arrangement form of the light-emitting elements L1, L2, and L3 on the lamp plate 324e, and will not be described further here.

[0081] As shown in FIG. 14, the lamp plate 324h is a rectangular lamp plate, and the arrangement forms of the light-emitting elements L1, L2, and L3 on the lamp plate 324h are the same as those on the lamp plate 324f of the light-emitting elements L1, L2, and L3, and will not be described further here.

[0082] As shown in FIG. 15, the lamp plate 324i is a rectangular lamp plate, and the light-emitting elements L1, L2, and L3 are arranged alternately in rows on the lamp plate 324i. That is, the light-emitting diode blocks Bfa for mounting the light-emitting element L1, the light-emitting diode block Bf for mounting the light-emitting element L2, and the light-emitting diode block Bfn configured to mount the light-emitting element L3 are arranged alternately in rows.

[0083] As shown in FIG. 16, the lamp plate 324j is a rectangular lamp plate, and the light-emitting elements L1, L2, and L3 are arranged alternately in a checkerboard pattern on the lamp plate 324j. That is, the light-emitting diode blocks Bfa for mounting the light-emitting element L1, the light-emitting diode block Bf for mounting the light-emitting element L2, and the light-emitting diode block Bfn configured to mount the light-emitting element L3 are arranged alternately in a checkerboard pattern.

[0084] As shown in FIG. 17, the lamp plate 324k is a quadrangular lamp plate, and the light-emitting elements L1, L2, and L3 are arranged alternately in a honeycomb pattern on the lamp plate 324k. That is, the light-emitting diode blocks Bfa for mounting the light-emitting element L1, the light-emitting diode block Bf for mounting the light-emitting element L2, and the light-emitting diode block Bfn configured to mount the light-emitting element L3 are arranged alternately in a honeycomb pattern.

[0085] As described above, the lighting device 200 of the present disclosure controls the pulsation frequency of the pulsating direct current I provided to the lamp string 2, so that the lamp string 2 emits blinking light, thereby achieving a specific demand (for example, treating, preventing, or improving a specific disease or symptom). Further, the DC drive current I p2 is a constant current, and the pulsating direct current I dri and the second pulsating direct current I p1 ​p2 is shunted from the DC drive current I dri and flows through the lamp string 1 as a pulsating DC current I p1 and the pulsating DC current I p2 are 180 degrees out of phase, and the pulsating DC current I p1 is used to drive the lamp string 1, and further improve the degree of human visual perception of the blinking light of the lamp string 2. In addition, the lighting devices 300, 300a to 300c of the present disclosure further include a lamp string 3 for emitting non-visible blinking light, and drive the lamp string 3 by using the DC drive current I dri to improve the degree of human visual perception of the blinking light of the lamp string 2, and further improve the stress on the human visual system caused by the blinking light stimulus, so that the lighting devices 200, 300 and 300a to 300c can be used as general lighting devices that can improve concentration / prevent specific diseases.

[0086] Although the present disclosure is disclosed in embodiments as described above, the above-described embodiments are not used to limit the present disclosure, and any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. The protection scope of the present disclosure should be based on what is defined by the scope of the patent application attached later.

Description of Reference Numerals

[0087] To make the above and other objects, features, advantages, and embodiments of the present disclosure clearer and easier to understand, the description of the attached reference numerals is as follows. 1, 2, 3, 1[1] to 1[x], 2[1] to 2[y], 3[1] to 3[z]: lamp string 100, 200, 300, 300a, 300b, 300c: lighting device 110, 210, 310: drive power supply 120, 220, 320: lighting module 224, 324, 324a to 324k: lamp board 226, 326: dimming circuit L1, L2, L3: light emitting element I dri : DC drive current I p1 1. I p2 : Pulsating direct current S PWM : Pulse signal N1: Shunt node PWM: Pulse width modulation controller CC: Constant current controller AC: Alternating current power DC: Direct current power VG: Voltage generator Bf, Bfa, Bfn: Light emitting diode block LS: Lamp cover A dri : Width value A max1 1. A max2 : Maximum width value A min1 1. A min2 : Minimum width value

Claims

1. A drive power source that provides a DC drive current to a shunt node, A first lamp string that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, A second lamp string that is electrically connected to the shunt node and is driven by a second pulsating DC current, A constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp string, A pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls the pulsation frequency of the second pulsating DC current provided to the second lamp string based on the pulse signal, Including, An illumination device, wherein the pulsation frequency of the second pulsating DC current is lower than 80 Hz, and the pulsation frequency of the first pulsating DC current is equal to the pulsation frequency of the second pulsating DC current.

2. The illumination device according to claim 1, wherein the first pulsating DC current and the second pulsating DC current are out of phase by 180 degrees, and the maximum width value and the minimum width value of the second pulsating DC current are set within the range of 0 to 1 times the width value of the DC drive current.

3. Further including a lamp board, a plurality of first light emitting elements of the first lamp string and a plurality of second light emitting elements of the second lamp string are on the lamp board, the first light emitting elements are installed in the outer peripheral region of the lamp board, and the second light emitting elements are installed in the central region of the lamp board. The illumination device according to claim 1.

4. A drive power source that provides a DC drive current to a shunt node, A first lamp string that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, A second lamp string that is electrically connected to the shunt node and is driven by a second pulsating DC current, A constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp string, A pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls the pulsation frequency of the second pulsating DC current provided to the second lamp string based on the pulse signal, Including, Further including a lamp board, a plurality of first light emitting elements of the first lamp string and a plurality of second light emitting elements of the second lamp string are on the lamp board, the first light emitting elements are installed in the outer peripheral region of the lamp board, and the second light emitting elements are installed in the central region of the lamp board. An illumination device.

5. The lighting device according to claim 1, further comprising a lamp board, wherein a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged on the lamp board.

6. A drive power source that provides a DC drive current to a shunt node, a first lamp row that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, a second lamp row that is electrically connected to the shunt node and is driven by a second pulsating DC current, a constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp row, a pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls a pulsation frequency of the second pulsating DC current provided to the second lamp row based on the pulse signal, comprising a lighting device, further comprising a lamp board, wherein a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged on the lamp board.

7. The lighting device according to claim 1, further comprising a lamp board, wherein a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged in a checkered pattern on the lamp board.

8. A drive power source that provides a DC drive current to a shunt node, a first lamp row that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, a second lamp row that is electrically connected to the shunt node and is driven by a second pulsating DC current, a constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp row, a pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls a pulsation frequency of the second pulsating DC current provided to the second lamp row based on the pulse signal, comprising a lighting device, further comprising a lamp board, wherein a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are alternately arranged in a checkered pattern on the lamp board.

9. The lighting device according to claim 1, further comprising a third lamp row that is connected between the drive power source and the shunt node and is driven by the DC drive current.

10. Further including a lamp board, a plurality of first light-emitting elements of the first lamp row, a plurality of second light-emitting elements of the second lamp row, and a plurality of third light-emitting elements of the third lamp row are arranged on the lamp board, and the second light-emitting elements, the first light-emitting elements, and the third light-emitting elements are arranged in order from the center of the lamp board to the outside of the lamp board. The lighting device according to claim 9.

11. A drive power source that provides a DC drive current to a shunt node, A first lamp row that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, A second lamp row that is electrically connected to the shunt node and is driven by a second pulsating DC current, A constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp row, A pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls the pulsation frequency of the second pulsating DC current provided to the second lamp row based on the pulse signal, Including, Further including a third lamp row that is connected between the drive power source and the shunt node and is driven by the DC drive current, Further including a lamp board, a plurality of first light-emitting elements of the first lamp row, a plurality of second light-emitting elements of the second lamp row, and a plurality of third light-emitting elements of the third lamp row are arranged on the lamp board, and the second light-emitting elements, the first light-emitting elements, and the third light-emitting elements are arranged in order from the center of the lamp board to the outside of the lamp board. A lighting device.

12. Further including a lamp board, a plurality of third light-emitting elements of the third lamp row are arranged outside the lamp board, and a plurality of first light-emitting elements of the first lamp row and a plurality of second light-emitting elements of the second lamp row are arranged alternately in a checkerboard pattern in the central region of the lamp board. The lighting device according to claim 9.

13. A drive power source that provides a DC drive current to a shunt node, A first lamp row that is electrically connected between the shunt node and a ground terminal and is driven by a first pulsating DC current, A second lamp row that is electrically connected to the shunt node and is driven by a second pulsating DC current, A constant current controller that is electrically connected in series between the shunt node and the ground terminal together with the second lamp row, A pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls the pulse frequency of the second pulsating direct current provided to the second lamp string based on the pulse signal; comprising; further comprising a third lamp string connected between the driving power source and the shunt node and driven by the direct current driving current; further comprising a lamp board, a plurality of third light emitting elements of the third lamp string are arranged outside the lamp board, and a plurality of first light emitting elements of the first lamp string and a plurality of second light emitting elements of the second lamp string are arranged in a checkerboard pattern and alternately arranged in the central region of the lamp board, a lighting device.

14. further comprising a lamp board, and a plurality of first light emitting elements of the first lamp string, a plurality of second light emitting elements of the second lamp string, and a plurality of third light emitting elements of the third lamp string are arranged in a checkerboard pattern and alternately arranged on the lamp board, the lighting device according to claim 9.

15. A driving power source that provides a direct current driving current to a shunt node, a first lamp string electrically connected between the shunt node and a ground terminal and driven by a first pulsating direct current; a second lamp string electrically connected to the shunt node and driven by a second pulsating direct current; a constant current controller electrically connected in series between the shunt node and the ground terminal together with the second lamp string; a pulse width modulation controller that is used to provide a pulse signal to the constant current controller, and the constant current controller controls the pulse frequency of the second pulsating direct current provided to the second lamp string based on the pulse signal; comprising; further comprising a third lamp string connected between the driving power source and the shunt node and driven by the direct current driving current; further comprising a lamp board, and a plurality of first light emitting elements of the first lamp string, a plurality of second light emitting elements of the second lamp string, and a plurality of third light emitting elements of the third lamp string are arranged in a checkerboard pattern and alternately arranged on the lamp board, a lighting device.

16. The driving power source controls the width value of the direct current driving current, the constant current controller controls the maximum width value and the minimum width value of the second pulsating direct current, and the first pulsating direct current is determined based on the direct current driving current and the second pulsating direct current, the lighting device according to claim 1.

17. The lighting device according to claim 1, wherein a ratio of a radiation output of the first lamp array to a radiation output of the second lamp array is within a range of 1:1 to 100:1.