Rotary type three-dimensional LED plant growth lamp set capable of adapting to different planting environments

Abstract

The invention discloses a rotary type three-dimensional LED plant growth lamp set capable of adapting to different planting environments, and relates to the technical field of plant light supplementing systems, the rotary type three-dimensional LED plant growth lamp set comprises a main truss and an auxiliary truss, a control panel is embedded in the main truss, the main truss and the auxiliary truss are vertically and horizontally arranged on the inner top of a greenhouse body, and illumination assemblies distributed at intervals are installed between the main truss and the auxiliary truss; according to the invention, on one hand, non-difference light supplement is carried out on plants with different plant heights and different areas in the greenhouse through combined actions of transposition, deflection and lifting of the LED lamp group, and on the other hand, the coverage value of branches and leaves and the illumination area value are obtained through the control system; intelligent analysis is carried out in combination with a formula, and synchronous adjustment of the corresponding illumination range and illumination interval is made, so that the light supplementing requirement that feedback intelligent automatic adjustment is lacked according to the plant planting density and plant seedling growth plant height changes is met, and the growth requirements in different planting environments are met.

Description

Technical Field

[0001] The present invention relates to the technical field of plant supplementary lighting systems, and in particular to a rotating three-dimensional LED plant growth lamp group that can adapt to different planting environments. Background Art

[0002] Plant growth lights are artificial light sources designed to stimulate plant growth by emitting an electromagnetic spectrum suitable for photosynthesis. Plant growth lights are used in applications where there is no natural light or supplemental light is required. When daylight hours may not be sufficient to achieve the desired plant growth requirements, plant growth lights are used to extend the time that plants receive light.

[0003] In the prior art, the lighting system for plants is applied to greenhouse cultivation, and the fill-in lights are installed at a uniform height through trusses. However, due to structural layout limitations, the layout density of the fill-in lights is not enough and the height cannot meet the fill-in lighting requirements of different plants. That is, the intensity of the light emitted by the fill-in lights is greatly reduced when it is irradiated on the surface of the plants. In addition, the height of the plants in the greenhouse changes rapidly in the early stage of growth, resulting in the plants being too close to the fill-in lights, which affects the growth of the plant seedlings.

[0004] Therefore, the prior art lacks an LED fill light group that can intelligently and automatically adjust according to plant planting density and changes in plant seedling growth height, and is unable to adapt to plant growth requirements in different planting environments. For this reason, the present application proposes a solution. Summary of the invention

[0005] The purpose of the present invention is to provide a rotating three-dimensional LED plant growth lamp group that can adapt to different planting environments, which is used to solve the problem that there is a lack of LED fill light groups that can intelligently and automatically adjust according to the plant planting density and the changes in the growth height of plant seedlings, and cannot adapt to the plant growth needs in different planting environments.

[0006] The object of the present invention can be achieved by the following technical solutions: a rotating three-dimensional LED plant growth lamp group that can adapt to different planting environments, including a main truss and a sub-truss, a control panel is embedded on the main truss, and the main truss and the sub-truss are arranged vertically and horizontally on the top of the shed body, and lighting components distributed at intervals are installed between the two;

[0007] The lighting assembly includes a rotating rod rotatably arranged between the main trusses, the rotating rod is sleeved with rotating frames distributed at intervals, a plurality of lampshades containing LED lamps are installed at the lower end of the outer ring side of the rotating frame, and a lateral deflection assembly for changing the direction of the lampshade is installed at the outer end of the rotating rod;

[0008] The main truss is a hollow structure with a longitudinal slot hole arranged in the bottom. Both sides of the main truss are provided with transverse slot holes connected with the longitudinal slot holes. The main truss is provided with a displacement component for shifting the lighting component through the longitudinal slot holes and the transverse slot holes.

[0009] It is further configured as follows: the lateral deflection assembly includes a drive motor and a synchronization rod arranged at the outer end of the rotating rod, the synchronization rod is installed at one end of the rotating rod, a rotating seat is installed at the other end of the rotating rod, and a sleeve connected to the drive motor is connected to the outer shell of the synchronization rod.

[0010] It is further configured as follows: an upper clamping cylinder and a lower clamping cylinder are respectively installed at the upper and lower ends of the outer ring surface of the sleeve, and a locking bolt is arranged between the upper clamping cylinder and the lower clamping cylinder.

[0011] It is further configured as follows: the transposition component includes a dual-axis motor arranged in the cavity of the main truss, the output ends of the dual-axis motor are respectively connected to an inner driving wheel and an outer traveling wheel, and the inner driving wheel and the outer traveling wheel are both rollingly connected to the main truss.

[0012] It is further configured as follows: a light-covering lifting assembly for vertically lifting the rotating rod is provided at the lower end of the dual-axis motor, the light-covering lifting assembly includes a cylinder and a connecting rod, the output end of the cylinder is connected to the connecting rod, and the connecting rod is connected to the upper clamping cylinder.

[0013] It is further configured as follows: the rotating rod is provided with insertion holes distributed at intervals, and the rotating rod is provided with a positioning rod connected to the rotating frame through the insertion holes.

[0014] It is further configured that: the control panel has a built-in control system, and the control system includes a plant lighting detection unit, a lighting range analysis unit, a feedback adjustment execution unit and a planting management unit that are communicatively connected;

[0015] The plant lighting detection unit is used to collect the branch and leaf coverage value and the illumination area value of the plant within a time threshold, and send the branch and leaf coverage value and the illumination area value to the illumination range analysis unit through the planting management unit. The illumination range analysis unit immediately analyzes the light exposure of the plant after receiving the branch and leaf coverage value and the illumination area value. The specific analysis process is as follows: the branch and leaf coverage value and the illumination area value within the time threshold are obtained, and the branch and leaf coverage value and the illumination area value are numerically calculated to obtain the light exposure coefficient, and the light exposure coefficient is compared and analyzed with the light exposure threshold preset by the system.

[0016] It is further configured as follows: the comparison and analysis process of the light reception coefficient and the light reception threshold preset by the system is as follows:

[0017] If the light receiving coefficient is less than the light receiving threshold, a threshold expansion signal is generated and sent to the feedback adjustment execution unit. The feedback adjustment execution unit sends the received threshold expansion signal to the drive motor. The drive motor starts to drive the rotating rod to deflect, so that the lampshade deflects outward, that is, the illumination range is expanded;

[0018] If the light receiving coefficient is less than the light receiving threshold, a threshold reduction signal is generated and sent to the feedback adjustment execution unit. The feedback adjustment execution unit sends the received threshold reduction signal to the drive motor. The drive motor starts to drive the rotating rod to deflect, so that the lampshade deflects inward, that is, the illumination range is reduced;

[0019] If the light reception coefficient is within the light reception threshold, no signal is generated.

[0020] The present invention has the following beneficial effects:

[0021] 1. The present invention is aimed at the problem that there is no LED fill light set that can automatically adjust according to the plant planting density and the height change of plant seedling growth, and cannot adapt to the plant growth needs in different planting environments:

[0022] On the one hand, the LED light group can be transposed, deflected and lifted to achieve indiscriminate supplementary lighting for plants of different plant heights and areas in the greenhouse. On the other hand, the control system obtains the branch and leaf coverage value and the light area value, combines the formula for intelligent analysis and makes corresponding synchronous adjustments to the light range and light spacing to meet the need for supplementary lighting that lacks intelligent automatic adjustment based on plant planting density and plant seedling growth height changes, so as to adapt to the growth needs in different planting environments.

[0023] 2. In the process of achieving indiscriminate lighting for plants of different heights and areas in the greenhouse through the combined actions of displacement, deflection and lifting of the LED light group, the main truss and the auxiliary truss are used as the basis, and the lighting components are used for lighting. The lighting components are deflected, displaced and lifted respectively through the lateral deflection components, displacement components and covering light lifting components, so that the plants in the greenhouse can get adaptive light adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0027] Figure 3 It is a schematic diagram of the side illumination range of the present invention;

[0028] Figure 4 It is an installation diagram of the transposition assembly and the light covering lifting assembly of the present invention;

[0029] Figure 5 It is a partial structural diagram of the lateral deflection assembly of the present invention;

[0030] Figure 6 It is a schematic diagram of the installation of the LED and the lampshade of the present invention;

[0031] Figure 7 It is a schematic cross-sectional diagram of the installation of the transposition assembly of the present invention;

[0032] Figure 8 It is a schematic diagram of the installation of the deflection disk of the present invention.

[0033] In the figure: 1. main truss; 2. secondary truss; 3. illumination assembly; 301. rotating frame; 302. lampshade; 303. rotating rod; 304. socket; 305. positioning rod; 306. mounting slot; 307. hanging ring; 308. LED lamp; 309. tension block; 4. longitudinal slot hole; 5. transverse slot hole; 6. transposition assembly; 61. dual-axis motor; 62. inner driving wheel; 63. outer walking wheel; 7. light covering lifting assembly; 71. cylinder; 72. connecting rod; 8. lateral deflection assembly; 81. driving motor; 82. sleeve; 83. upper clamping cylinder; 84. lower clamping cylinder; 85. locking bolt; 86. rotating seat; 87. synchronization rod. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1: Reference Figure 1 - Figure 8 As shown, in this embodiment, the rotating three-dimensional LED plant growth lamp group that can adapt to different planting environments includes a main truss 1 and a sub-truss 2, a control panel is embedded on the main truss 1, and the main truss 1 and the sub-truss 2 are arranged vertically and horizontally on the top of the shed body, and lighting components 3 distributed at intervals are installed between the two;

[0036] The lighting assembly 3 includes a rotating rod 303 rotatably arranged between the main trusses 1, on which the rotating rod 303 is sleeved a rotating frame 301 arranged at intervals, and a plurality of lampshades 302 containing LED lamps 308 are installed at the lower end of the outer ring side of the rotating frame 301, and a lateral deflection assembly 8 for changing the direction of the lampshade 302 is installed at the outer end of the rotating rod 303;

[0037] The main truss 1 is a hollow structure and has a longitudinal slot hole 4 arranged in the bottom longitudinally. Both sides of the main truss 1 are provided with transverse slot holes 5 connected with the longitudinal slot holes 4. The main truss 1 is provided with a displacement assembly 6 for shifting the illumination assembly 3 through the longitudinal slot holes 4 and the transverse slot holes 5. The rotating rod 303 is provided with spaced-apart plug holes 304. The rotating rod 303 is provided with a positioning rod 305 connected with the rotating frame 301 through the plug holes 304.

[0038] The LED lamp group is installed by means of the positioning rods 305 and the rotating frame 301 arranged at intervals. The densely distributed LED lamps can provide supplementary lighting for the plant growth area in the entire greenhouse. The LED lamps 308 of different colors installed in each lampshade 302 can provide supplementary lighting for plants at different growth stages, and the adjustment is convenient.

[0039] Reference Figure 4 and Figure 5 As shown, the lateral deflection assembly 8 includes a driving motor 81 and a synchronization rod 87 disposed at the outer end of the rotating rod 303. The synchronization rod 87 is installed at one end of the rotating rod 303, and a rotating seat 86 is installed at the other end of the rotating rod 303. A sleeve 82 connected to the driving motor 81 is connected to the outer surface of the synchronization rod 87. An upper clamp 83 and a lower clamp 84 are respectively installed at the upper and lower ends of the outer ring surface of the sleeve 82, and a locking bolt 85 is provided between the upper clamp 83 and the lower clamp 84.

[0040] When lateral deflection is required: the driving motor 81 is started to drive the rotating rod 303 to rotate through the synchronous rod 87, and then the rotating frame 301 on the rotating rod 303 drives the lampshade 302 to rotate, and the lighting area of ​​the LED lamp 308 in the lampshade 302 also changes accordingly;

[0041] In order to adjust the illumination area of ​​each LED lamp 308, the following additional features are provided: a semicircular mounting groove 306 is provided at the bottom of the outer ring side of the rotating frame 301, and the rotating frame 301 is provided with a plurality of tightening blocks 309 connected to the lampshade 302 through the mounting groove 306. The tightening blocks 309 can be fixed in position after being installed in the mounting groove 306, and will not shift in position during the deflection of the lampshade 302, so the initial illumination area can be effectively adjusted according to the growth position of the plant and the spread of branches and leaves.

[0042] In addition, it is important to note that: Figure 4 and Figure 6 As shown, by setting the rotating frame 301 as a circular ring structure, the LED lamps 308 on the rotating frame 301 can adjust the illumination range more conveniently, and the LED lamps 308 distributed in a circular array can provide comprehensive illumination for the plants planted in the shed, avoiding the disadvantage that the ceiling-mounted illumination lamps have a fixed illumination range that is not conducive to the comprehensive reception of light by the branches and leaves of the plants.

[0043] Embodiment 2: This embodiment further optimizes the structure of the transposition component 6 in Embodiment 1:

[0044] Reference Figure 1 , Figure 4 As shown, the transposition assembly 6 includes a double-axis motor 61 disposed in the cavity of the main truss 1, the output ends of the double-axis motor 61 are respectively connected to an inner driving wheel 62 and an outer traveling wheel 63, the inner driving wheel 62 and the outer traveling wheel 63 are both rollingly connected to the main truss 1, and the lower end of the double-axis motor 61 is provided with a light covering lifting assembly 7 for vertically lifting the rotating rod 303;

[0045] The cover light lifting assembly 7 includes a cylinder 71 and a connecting rod 72. The output end of the cylinder 71 is connected to the connecting rod 72, and the connecting rod 72 is connected to the upper clamping cylinder 83. The operation process of the transposition assembly 6 is as follows: the double-axis motor 61 is started, driving the inner driving wheel 62 and the outer walking wheel 63 to move in the transverse slot hole 5 on the main truss 1 respectively. During the walking process, the upper clamping cylinder 83 is guided by the longitudinal slot hole 4 to complete the transverse movement, and finally drives the rotating rod 303 to complete the transverse movement through the upper clamping cylinder 83;

[0046] Basic principle: Through the combined actions of displacement, deflection and lifting of the LED light group, the plants of different heights and areas in the greenhouse can be given indiscriminate supplementary lighting. Specifically, the main truss 1 and the auxiliary truss 2 are used as the basis, and the lighting component 3 is used for supplementary lighting. The lateral deflection component 8, the displacement component 6 and the covering light lifting component 7 are used to deflect, displace and lift the lighting component 3 respectively, so that the plants in the greenhouse can get adaptive light adjustment.

[0047] Embodiment 3: This embodiment combines the above-mentioned embodiments 1 and 2, and realizes intelligent follow-up adjustment according to the plant planting density and the change of the height of the seedling growth through intelligent control, as follows; the control panel is built with a control system, and the control system includes a plant lighting detection unit, a lighting range analysis unit, a feedback adjustment execution unit and a planting management unit that are connected to each other;

[0048] The plant lighting detection unit is used to collect the branch and leaf coverage value and the lighting area value of the plant within the time threshold, and send the branch and leaf coverage value and the lighting area value to the lighting range analysis unit and the planting management unit through the planting management unit, wherein the branch and leaf coverage value is measured by the camera set on the main truss 1 and the secondary truss 2 through the overhead photo, and the lighting area value is measured by the light meter;

[0049] The illumination range analysis unit immediately analyzes the light intensity of the plant after receiving the branch and leaf coverage value and the illumination area value. The specific analysis process is as follows: the branch and leaf coverage value and the illumination area value within the time threshold are obtained, and the branch and leaf coverage value ZYs and the illumination area value GZs are calculated by the formula After calculation, the light receiving coefficient SGz is obtained, and the light receiving coefficient is compared and analyzed with the light receiving threshold preset by the system. The comparative analysis process of the light receiving coefficient and the light receiving threshold preset by the system is as follows:

[0050] If the light receiving coefficient is less than the light receiving threshold, a threshold expansion signal is generated and sent to the feedback adjustment execution unit. The feedback adjustment execution unit sends the received threshold expansion signal to the drive motor 81. The drive motor 81 starts to drive the rotating rod 303 to deflect, so that the lampshade 302 deflects outward, and at the same time, the dual-axis motor 61 receives the signal and starts, driving the illumination component 3 to expand the spacing, that is, to expand the illumination range;

[0051] If the light reception coefficient is greater than the light reception threshold, a reduction threshold signal is generated and sent to the feedback adjustment execution unit. The feedback adjustment execution unit sends the received reduction threshold signal to the drive motor 81. The drive motor 81 starts to drive the rotating rod 303 to deflect, causing the lampshade 302 to deflect inward, and at the same time, the dual-axis motor 61 receives the signal and starts, driving the illumination component 3 to reduce the spacing, that is, to reduce the illumination range; if the light reception coefficient is within the light reception threshold, no signal is generated.

[0052] In addition, the planting management unit uses the received branch and leaf coverage value ZYs and light area value GZs through the formula The plant height coefficient PZx is calculated, where d is the preset proportional factor coefficient, and d>0. The plant height coefficient is compared and analyzed with the preset lifting and lowering standard value of the system. The analysis process is as follows:

[0053] If the plant height coefficient is greater than the lifting standard value, it means that the current light emitting height of the LED lamp 308 in the lampshade 302 cannot meet the supplementary lighting of the plant height in the growth stage, which is specifically manifested as the spacing is too close. At this time, the planting management unit generates a positive height adjustment signal, and the cylinder 71 is started to drive the connecting rod 72 and the upper clamp 83 to move upward, that is, the entire lighting assembly 3 moves upward in the vertical position, thereby increasing the distance from the top of the plant in the growth stage to avoid the "drying seedling" phenomenon;

[0054] If the plant height coefficient is less than the lifting standard value, it means that the luminous height of the LED lamp 308 in the current lampshade 302 cannot meet the supplementary lighting of the plant height in the growth stage, which is specifically manifested as the distance is too far. At this time, the planting management unit generates a reverse lowering signal, and the cylinder 71 is started to drive the connecting rod 72 and the upper clamp 83 to move downward, that is, the entire lighting assembly 3 moves downward in the vertical position, thereby reducing the distance from the top of the plant in the growth stage to avoid insufficient supplementary lighting;

[0055] If the plant height coefficient = the lifting and lowering standard value, it means that the current supplementary lighting of the LED lamp 308 is normal and maintains stable operation.

[0056] In summary: when used in a planting greenhouse, the LED lamp group in the present invention has the same basic principle as the conventional LED lamp group in the prior art. The difference lies in that: for plants in different planting environments, on the one hand, the LED lamp group can be displaced, deflected, and lifted to achieve indiscriminate fill lighting for plants of different plant heights and areas in the greenhouse; on the other hand, the control system obtains the branch and leaf coverage value and the light area value, combines the formula for intelligent analysis, and makes corresponding synchronous adjustments to the light range and light spacing to meet the need for fill lighting that lacks intelligent and automatic adjustment based on feedback of plant planting density and changes in plant seedling growth height, so as to adapt to the growth needs under different planting environments.

[0057] The above formulas are obtained by collecting a large amount of data for software simulation and selecting a formula that is close to the actual value. The coefficients in the formula are set by technical personnel in this field according to actual conditions. The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited to this. Any technical personnel familiar with the technical field within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, make equivalent replacement or change, which should be covered within the protection scope of the present invention.

Claims

1. A rotating three-dimensional LED plant growth lamp set adaptable to different planting environments, comprising a main truss (1) and a secondary truss (2), wherein a control panel is embedded on the main truss (1), characterized in that: The main truss (1) and the secondary truss (2) are arranged vertically and horizontally on the top of the shed, and lighting components (3) are installed between the two and are spaced apart; The lighting assembly (3) comprises a rotating rod (303) rotatably arranged between the main trusses (1), the rotating rod (303) being sleeved with rotating frames (301) arranged at intervals, a plurality of lampshades (302) containing LED lamps (308) being mounted at the lower end of the outer ring side of the rotating frame (301), and a lateral deflection assembly (8) for changing the orientation of the lampshades (302) being mounted at the outer end of the rotating rod (303); The main truss (1) is a hollow structure and has a longitudinal slot hole (4) arranged in the bottom longitudinally. Both sides of the main truss (1) are provided with transverse slot holes (5) connected to the longitudinal slot holes (4). The main truss (1) is provided with a displacement component (6) for shifting the illumination component (3) through the longitudinal slot holes (4) and the transverse slot holes (5).

2. The rotating three-dimensional LED plant growth lamp set that can adapt to different planting environments according to claim 1 is characterized in that: The lateral deflection assembly (8) comprises a driving motor (81) and a synchronization rod (87) arranged at the outer end of a rotating rod (303); the synchronization rod (87) is mounted on one end of the rotating rod (303); a rotating seat (86) is mounted on the other end of the rotating rod (303); and a sleeve (82) connected to the driving motor (81) is connected to the outer shell of the synchronization rod (87).

3. The rotating three-dimensional LED plant growth lamp set that can adapt to different planting environments according to claim 2 is characterized in that: An upper clamp (83) and a lower clamp (84) are respectively installed at the upper and lower ends of the outer ring surface of the sleeve (82), and a locking bolt (85) is arranged between the upper clamp (83) and the lower clamp (84).

4. The rotating three-dimensional LED plant growth lamp set that can adapt to different planting environments according to claim 3 is characterized in that: The transposition assembly (6) comprises a dual-axis motor (61) arranged in the cavity of the main truss (1), the output ends of the dual-axis motor (61) are respectively connected to an inner driving wheel (62) and an outer traveling wheel (63), and the inner driving wheel (62) and the outer traveling wheel (63) are both rollingly connected to the main truss (1).

5. The rotating three-dimensional LED plant growth lamp set that can adapt to different planting environments according to claim 4 is characterized in that: A light-covering lifting assembly (7) for vertically lifting the rotating rod (303) is arranged at the lower end of the dual-axis motor (61); the light-covering lifting assembly (7) comprises a cylinder (71) and a connecting rod (72); the output end of the cylinder (71) is connected to the connecting rod (72), and the connecting rod (72) is connected to the upper clamping cylinder (83).

6. The rotating three-dimensional LED plant growth lamp set adaptable to different planting environments according to claim 1 is characterized in that: The rotating rod (303) is provided with insertion holes (304) distributed at intervals, and a positioning rod (305) connected to the rotating frame (301) is installed on the rotating rod (303) through the insertion holes (304).

7. The rotating three-dimensional LED plant growth lamp set that can adapt to different planting environments according to claim 1 is characterized in that: The control panel is built with a control system, and the control system includes a plant lighting detection unit, a lighting range analysis unit, a feedback adjustment execution unit and a planting management unit that are communicatively connected; The plant lighting detection unit is used to collect the branch and leaf coverage value and the illumination area value of the plant within a time threshold, and send the branch and leaf coverage value and the illumination area value to the illumination range analysis unit through the planting management unit. The illumination range analysis unit immediately analyzes the light exposure of the plant after receiving the branch and leaf coverage value and the illumination area value. The specific analysis process is as follows: the branch and leaf coverage value and the illumination area value within the time threshold are obtained, and the branch and leaf coverage value and the illumination area value are numerically calculated to obtain the light exposure coefficient, and the light exposure coefficient is compared and analyzed with the light exposure threshold preset by the system.

8. The rotating three-dimensional LED plant growth lamp set that can adapt to different planting environments according to claim 7 is characterized in that: The comparative analysis process of the light reception coefficient and the light reception threshold preset by the system is as follows: If the light receiving coefficient is less than the light receiving threshold, a threshold expansion signal is generated and sent to the feedback adjustment execution unit. The feedback adjustment execution unit sends the received threshold expansion signal to the drive motor (81). The drive motor (81) is started to drive the rotating rod (303) to deflect, so that the lampshade (302) deflects outward, that is, the illumination range is expanded; If the light receiving coefficient is less than the light receiving threshold, a threshold reduction signal is generated and sent to the feedback adjustment execution unit. The feedback adjustment execution unit sends the received threshold reduction signal to the drive motor (81). The drive motor (81) is started to drive the rotating rod (303) to deflect, so that the lampshade (302) deflects inward, that is, the illumination range is reduced; If the light reception coefficient is within the light reception threshold, no signal is generated.

Images