Sunlight filtering through trees simulation control device

Abstract

This leaf-filtered sunlight simulation control device (100) has a plurality of light sources (1), a single lens (2), and a leaf-filtered sunlight light source control module (3) that controls the positions of the plurality of light sources (1). The leaf-filtered sunlight light source control module (3) controls the positions of the plurality of light sources (1) so that the formula F < A is satisfied, where F is the focal distance of the lens (2) and A is the distance from a center axis (Z1) of the lens (2) to each of the plurality of light sources (1).

Description

Technical Field

[0001] The present disclosure relates to a dappled sunlight simulation control device.

Background Art

[0002] Generally, a lighting device has been proposed that can create a lighting effect such as dappled sunlight using a plurality of lenses (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the conventional technology, since it is necessary to use a plurality of lenses, there is a problem that the device becomes large-sized.

[0005] An object of the present disclosure is to provide a dappled sunlight simulation control device that can simulate dappled sunlight with a simple configuration.

Means for Solving the Problems

[0006] A dappled sunlight simulation control device according to an aspect of the present disclosure includes a single lens, a plurality of light sources arranged parallel to a central axis perpendicular to the optical axis of the lens, a lens position driving unit that adjusts the distance between the lens and the plurality of light sources; outputs an instruction for adjusting the distance between the lens and the plurality of light sources to the lens position driving unit a dappled sunlight light source control module 、 and is provided with when the focal length of the lens is F and the distance from the central axis to each of the plurality of light sources is A, the lens position driving unit adjusts the distance between the lens and the plurality of light sources based on an instruction from the dappled sunlight light source control module so as to satisfy F < A adjusts the distance between the lens and the plurality of light sources . A dappled sunlight simulation control device according to another aspect of the present disclosure a single lens; a plurality of light sources arranged parallel to a central axis perpendicular to the optical axis of the lens; a dappled sunlight light source control module that controls the plurality of light sources and includes when the focal length of the lens is F and the distance from the central axis to each of the plurality of light sources is A, F < A is satisfied, when the distance from the central axis to each of the plurality of light sources is C, A ≤ C and (A × F) / (A - F) < (2 × C × F) / (C - F) is satisfied. A dappled sunlight simulation control device according to another aspect of the present disclosure a single lens; a plurality of light sources arranged parallel to a central axis perpendicular to the optical axis of the lens; a dappled sunlight light source control module that controls the plurality of light sources and includes when the focal length of the lens is F and the distance from the central axis to each of the plurality of light sources is A, F < A is satisfied, the dappled sunlight light source control module has emission point lighting sequence fluctuation data for determining the lighting sequence or extinguishing sequence of the plurality of light sources, emission fluctuation data for determining the light source to be emitted among the plurality of light sources, and fluctuation data for determining the time for holding the lighting or extinguishing of the plurality of light sources and has controls the lighting sequence or extinguishing sequence of the plurality of light sources using the emission point lighting sequence fluctuation data, controls the light source to be emitted using the emission fluctuation data, and controls the time for holding the lighting or extinguishing of the plurality of light sources using the fluctuation data. A dappled sunlight simulation control device according to another aspect of the present disclosure a single lens; a plurality of light sources arranged parallel to a central axis perpendicular to the optical axis of the lens; a dappled sunlight light source control module that controls the plurality of light sources and includes when the focal length of the lens is F and the distance from the central axis to each of the plurality of light sources is A, F < A is satisfied, The sunlight filtering light source control module changes the illuminance of each of the plurality of light sources at a first timing, and increases the illuminance of any of the plurality of light sources to a higher illuminance than the highest illuminance at the first timing at a second timing different from the first timing. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a sunlight filtering through trees simulation control device that can simulate sunlight filtering through trees with a simple configuration. [Brief description of the drawings]

[0008] [Figure 1]1 is a diagram illustrating a schematic diagram of a sunlight filtering simulation control device according to a first embodiment of the present disclosure. [Diagram 2] 1 is a diagram illustrating an example of a relationship between a plurality of light sources, a lens, and a projection surface. [Diagram 3] 1 is a diagram showing an outline of an illuminating pattern formed at a position distance X from the central axis of the lens, and an illuminating pattern formed at a position distance B from the central axis of the lens. [Figure 4] FIG. 11 is a block diagram illustrating a schematic configuration of a sunlight filtering simulation control device according to a second embodiment of the present disclosure. [Diagram 5] 11A and 11B are diagrams illustrating an example of a change in the order in which a plurality of light sources are turned on or a change in the movement of the lights; [Figure 6] FIG. 13 is a diagram showing an example of the occurrence frequency of lighting of a plurality of light sources arranged in the X-axis direction. [Figure 7] 11A and 11B are diagrams illustrating an example of a change in the number of lights emitted by a plurality of light sources or a change in the light emission width. [Figure 8] FIG. 13 is a diagram showing an example of the occurrence frequency of the number of lights emitted by a plurality of light sources arranged in the Z-axis direction (that is, the light-emitting widths of a plurality of light sources). [Figure 9] 11 is a graph showing a relationship between the time for which a light emitting state is maintained and the occurrence frequency. [Figure 10] FIG. 11 is a block diagram illustrating a schematic configuration of a sunlight filtering simulation control device according to a third embodiment of the present disclosure. [Figure 11] 11 is a graph showing a rough relationship between the amount of change from the previous brightness to the next brightness and the occurrence frequency. [Figure 12] FIG. 11 is a block diagram illustrating a schematic configuration of a sunlight filtering simulation control device according to a fourth embodiment of the present disclosure. [Figure 13] FIG. 13 is a diagram illustrating an example of the occurrence frequency of lighting of a plurality of light sources. [Figure 14] FIG. 11 is a diagram illustrating an example of the occurrence frequency of lighting of a plurality of light sources. [Figure 15] 11 is a graph showing a relationship between the time for which a light emitting state is maintained and the occurrence frequency. [Figure 16] 10 is a graph showing a rough relationship between the amount of change (absolute value) from the previous brightness to the next brightness and the occurrence frequency. [Figure 17] It is a block diagram schematically showing the configuration of the dappled sunlight simulation control device according to Embodiment 5 of the present disclosure.

Embodiments for Carrying Out the Invention

[0009] Embodiment 1. FIG. 1 is a diagram schematically showing a dappled sunlight simulation control device 100 according to Embodiment 1 of the present disclosure. The dappled sunlight simulation control device 100 includes a plurality of light sources 1, a single lens 2 through which the light fluxes from the plurality of light sources 1 can pass, and a dappled sunlight light source control module 3 that controls the positions of the plurality of light sources 1. The plurality of light sources 1 are also collectively referred to as a "light source unit".

[0010] FIG. 2 is a diagram showing an example of the relationship among the plurality of light sources 1, the lens 2, and the projection plane. The lens 2 is arranged in front of the plurality of light sources 1. That is, the lens 2 is arranged so as to face the plurality of light sources 1. In the example shown in FIG. 1, the lens 2 is a convex lens. The focal length of the lens 2 is F.

[0011] The central axis Z1 is perpendicular to the optical axis Z2 of the lens 2. The distance A is the distance from the central axis Z1 of the lens 2 to each light source 1 and is the distance on a straight line parallel to the optical axis Z2. In this case, the relationship between the focal length F and the distance A is F < A. The light emission patterns of the plurality of light sources 1 are projected onto the projection plane. Each light source 1 is connected to the dappled sunlight light source control module 3 and is controlled by the dappled sunlight light source control module 3.

[0012] In the present application, the distance from the center Z0 of the lens 2 means the distance from the center Z0 of the lens 2 and is the distance on a straight line parallel to the optical axis Z2, and the distance from the central axis Z1 of the lens 2 means the distance from the central axis Z1 of the lens 2 and is the distance on a straight line parallel to the optical axis Z2.

[0013] In the example shown in FIG. 2, the plurality of light sources 1 are arranged parallel to the central axis Z1. The focused projection image 1FF is projected at a position at a distance B from the central axis Z1 of the lens 2. In the example shown in FIG. 2, the number of light sources 1 is 12. In FIG. 2, the projection image 1FF corresponding to the upper half of the 12 light sources 1 is shown.

[0014] In the example shown in FIG. 2, the relationship (1 / A) + (1 / B) = (1 / F) holds. Therefore, when the relationship between the focal length F and the distance A satisfies F < A, B is a positive value, and the light emission pattern of the plurality of light sources 1 is projected onto the projection surface.

[0015] When projecting the light emission pattern of the light source 1 with a magnification α = (b / a), the focal length F is represented by F = {α / (α + 1)} × A. Therefore, each component of the dappled sunlight simulation control device 100 is included in a positional relationship that satisfies F < A.

[0016] If the condition between the focal length F and the distance A is F < A, the light emission pattern of the plurality of light sources 1 is projected onto the projection surface, but the upper limit side is also assumed. The sunlight reaching from almost infinity is a parallel light beam, and in theory, the dappled sunlight can be a clearly focused projection image in any projection state. However, in reality, since a blurred projection image is formed by light diffraction, even if the magnification α and the focal length F are determined so that the focal length F becomes F = {α / (α + 1)} × A, it is not necessary to determine the distance A.

[0017] Therefore, as shown in FIG. 2, the positions of the multiple light sources 1 are set at a position of distance C from the central axis Z1 of the lens 2. In FIG. 2, the multiple light sources 1 arranged at a position of distance C from the central axis Z1 of the lens 2 are shown as "multiple light sources 1A". In this case, the multiple light sources 1A are also arranged parallel to the central axis Z1 of the lens 2. The distance C is longer than the distance A. In this case, as shown by the dashed line in FIG. 2, the light beams from the multiple light sources 1A are gathered at a position of distance X from the central axis Z1 of the lens 2, a focused projected image 1FF is formed at a position of distance X from the central axis Z1 of the lens 2, and a blurred projected image 1FC including a difference D from the projected image 1FF is formed at a position of distance B from the central axis Z1 of the lens 2.

[0018] FIG. 3 is a diagram showing a schematic view of a projected image 1FF formed at a position distance X from the central axis Z1 of the lens 2, and a projected image 1FC formed at a position distance B from the central axis Z1 of the lens 2. As shown in FIG. When the upper half of the multiple light sources 1A shown in Figure 2 are turned on, off, on, off, on, and off, in order from the top, the light emission pattern from each light source 1A forms a projected image 1FF at a position distance X from the central axis Z1 of the lens 2, as shown in Figure 3, and a blurred projected image 1FC is formed on the projection surface at a position distance B from the central axis Z1 of the lens 2.

[0019] Assuming that the projection image 1FF is smoothed and uniform, it is considered that the length of the blurred projection image 1FC becomes Y+D=2Y when compared to the length Y of the projection image 1FF. Therefore, the distance C needs to be limited so that the difference D is smaller than the length Y.

[0020] When the multiple light sources 1A are located at a distance C from the central axis Z1 of the lens 2, the length of the upper half or lower half of the multiple light sources 1A is y, and the length of the projected image 1FF formed at a position at a distance X from the central axis Z1 of the lens 2 is Y, the following relationship holds: X / C=Y / y

[0021] When a plurality of light sources 1A are located at a position of a distance C from the central axis Z1 of the lens 2, if the length of the upper half or the lower half of the plurality of light sources 1A is y, and the length of the projected image 1FC formed on the projection plane at a distance B from the central axis Z1 of the lens 2 is "Y + D", the following relationship holds. B / C = (Y + D) / y

[0022] In order to suppress the averaging due to blurring, the relationship between the difference D and the length Y is set as D < Y. That is, the difference D is set to be smaller than the length Y. In this case, the following relationship holds. B / C < (Y + Y) / y = 2Y / y = 2X / C

[0023] Therefore, it is necessary to place a plurality of light sources 1A at a position of a distance C from the central axis Z1 of the lens 2 so as to satisfy B < 2X. The distance A from the central axis Z1 of the lens 2 with a focal length F to each light source 1 and the distance B from the central axis Z1 of the lens 2 to the projection plane satisfy the following relationship. (1 / A) + (1 / B) = (1 / F) B = (A×F) / (A - F) < 2X

[0024] The distance C from the central axis Z1 of the lens 2 with a focal length F to each light source 1A and the distance X from the central axis Z1 of the lens 2 to the position where the foci coincide satisfy the following relationship. (1 / C) + (1 / X) = (1 / F) X = (C×F) / (C - F)

[0025] When B < 2X, the difference D, which is the magnitude of blurring, becomes smaller than the length Y. Therefore, when the following relationship is satisfied, the averaging due to blurring can be suppressed. B = (A×F) / (A - F) < 2X =(2×C×F) / (C - F)

[0026] As described above, the positions of the plurality of light sources 1 and the position of the lens 2 having the focal length F are positions where the relationship between the focal length F and the distance A from the central axis Z1 of the lens 2 to each of the plurality of light sources 1 satisfies F < A. That is, the dappled sunlight light source control module 3 controls the positions of the plurality of light sources 1 so as to satisfy F < A. In this case, when the plurality of light sources 1 are arranged so as to satisfy A ≤ C and (A × F) / (A - F) < (2 × C × F) / (C - F), the distance B from the central axis Z1 of the lens 2 to the projection surface becomes a positive value, and a projection image with the difference D, which is the size of the blur, suppressed can be obtained. Thereby, the light of the dappled sunlight that a person visually recognizes can be simulated.

[0027] As described above, according to the present embodiment, it is possible to provide a dappled sunlight simulation control device that can simulate the light of dappled sunlight with a simple configuration. Further, according to the present embodiment, it is possible to project light simulating dappled sunlight over an area wider than the light source unit.

[0028] The dappled sunlight light source control module 3 is composed of, for example, at least one processor and at least one memory. The processor is, for example, a central processing unit (CPU) that executes a program stored in the memory. In this case, the functions of the respective components of the dappled sunlight light source control module 3 are realized by software, firmware, or a combination of software and firmware. Software and firmware can be stored in the memory as a program. With this configuration, the program for realizing the functions of the dappled sunlight light source control module 3 is executed by a computer.

[0029] The memory is a computer-readable recording medium, and is, for example, a volatile memory such as a Random Access Memory (RAM) and a Read Only Memory (ROM), a non-volatile memory, or a combination of a volatile memory and a non-volatile memory.

[0030] The sunlight filtering light source control module 3 may be configured with a processing circuit as dedicated hardware such as a single circuit or a composite circuit. In this case, the functions of each component of the sunlight filtering light source control module 3 are realized by the processing circuit.

[0031] Embodiment 2 4 is a block diagram showing a schematic configuration of a sunlight filtering simulation control device 100 according to the second embodiment of the present disclosure. Note that the lens 2 is not shown in FIG. In the second embodiment, the sunlight filtering light source control module 3 of the sunlight filtering simulation control device 100 has a light source drive circuit 4, a lighting hold time fluctuation data generation circuit 5, a light emission number fluctuation data generation circuit 6, and a light emission lighting order fluctuation data generation circuit 7. The light source drive circuit 4 is composed of, for example, a plurality of light source drive circuits.

[0032] The sunlight filtering light source control module 3 has light emission lighting order fluctuation data that determines the order in which the multiple light sources 1 are turned on or off, light emission fluctuation data that determines which of the multiple light sources 1 are to emit light, and fluctuation data that determines the time for which the multiple light sources 1 are to be kept on or off.

[0033] The sunlight filtering light source control module 3 uses light emission lighting order fluctuation data to control the order in which the multiple light sources 1 are turned on or off, uses the light emission fluctuation data to control which light sources 1 are to emit light, and uses the fluctuation data to control the time for which the multiple light sources 1 are kept on or off.

[0034] The light-on hold time fluctuation data generating circuit 5 generates and outputs fluctuation data. The light-on number fluctuation data generating circuit 6 generates and outputs light-on fluctuation data. The light-on order fluctuation data generating circuit 7 generates and outputs light-on order fluctuation data.

[0035] The output from the light emission lighting order fluctuation data generation circuit 7 is input to the light emission number fluctuation data generation circuit 6, and a command as to whether the multiple light sources 1 are to be turned on or off is output from the light emission number fluctuation data generation circuit 6 and input to the light source drive circuit 4. The light source drive circuit 4 is a circuit that drives each light source 1 to be turned on or off. The duration for which each light source 1 is kept on or off is determined by the lighting retention time fluctuation data generation circuit 5, and the outputs from the light emission lighting order fluctuation data generation circuit 7 and the light emission number fluctuation data generation circuit 6 are updated.

[0036] FIG. 5 is a diagram showing an example of a change in the order in which the light sources 1 are turned on or a change in the movement of the lights. The example shown in FIG. 5 shows a 16 x 16 matrix light source that is turned on or off, with a digital mosaic pattern simulating the appearance of light filtering through the trees from the lit areas.

[0037] The example shown in Fig. 5 is a diagram simulating a state in which an object blocking sunlight (e.g., a tree branch or a tree leaf) is swaying in the X-axis direction, and the lit light source becomes a light-emitting point that reaches the ground as sunlight filtering through the trees. When an object blocking sunlight is swaying in the X-axis direction, the light-emitting point moves in the +X direction (to the right in Fig. 5) in the diagram in the positive direction, and moves in the -X direction (to the left in Fig. 5) in the diagram in the negative direction, with "0" in Fig. 5 as the center.

[0038] The light emission lighting order fluctuation data generation circuit 7 generates and outputs light emission lighting order fluctuation data for determining which light sources 1 should be lit in the positive direction (for example, up to +3) and the negative direction (for example, up to -3) with "0" in Fig. 5 as the center, and for emitting light from each light source 1. In this case, it is desirable to generate and output light emission lighting order fluctuation data for controlling not only the fluctuation in the X-axis direction, but also the light emission points of the fluctuation in the direction perpendicular to the X-axis direction, and to express the fluctuation in two mutually orthogonal axial directions by emitting light from each light source 1.

[0039] FIG. 6 is a diagram showing an example of the occurrence frequency of lighting of a plurality of light sources 1 arranged in the X-axis direction. The light emission lighting sequence fluctuation data generating circuit 7 determines the fluctuation, for example, as shown in Fig. 6. When the central light source among the multiple light sources 1 arranged in the X-axis direction is set to "0", the light emission lighting sequence fluctuation data generating circuit 7 generates and outputs light emission lighting sequence fluctuation data for controlling each light source 1 so that the light sources 1 are frequently lit up to +3 on the positive side of the lighting sequence and frequently lit up to -3 on the negative side.

[0040] On the other hand, the light emission lighting sequence fluctuation data generation circuit 7 generates and outputs light emission lighting sequence fluctuation data for controlling each light source 1 so that it lights up less frequently from +3 to +5, generates and outputs light emission lighting sequence fluctuation data for controlling each light source 1 so that it lights up less frequently from -3 to -5, and generates and outputs light emission lighting sequence fluctuation data for controlling the light source 1 so that it lights up less frequently at position "0".

[0041] By such control, the sunlight filtering simulation control device 100 realizes a fluctuation control where an object blocking sunlight sways stably with a high frequency and an unstable swaying state occurs with a low frequency. In other words, if the lighting order is controlled so that the frequency of maintaining the state at 0 is the highest, and the frequency of lighting up on the positive side of the lighting order up to +5 is reduced, and the frequency of lighting up on the negative side up to -5 is reduced, it is possible to simulate a state where an object blocking sunlight does not sway but sways occasionally.

[0042] FIG. 7 is a diagram showing an example of a change in the number of lights emitted by the plurality of light sources 1 or a change in the light emission width. In the example shown in Fig. 7, a 16 x 16 matrix light source is shown in a lit or unlit state, simulating light leaking through the trees as sunlight filtering through the trees from the lit parts. Specifically, Fig. 7 is a diagram simulating an object (e.g., a tree branch or a tree leaf) blocking sunlight swaying in the Z-axis direction, and the lit light source 1 is the light-emitting point where sunlight filters through the trees. The Z-axis direction is perpendicular to the X-axis direction.

[0043] When an object blocking sunlight sways in the Z-axis direction, as the object blocking sunlight moves away from the sun (light source 1 in the case of the sunlight filtering through trees simulation control device 100) with the light source 1 at position "0" shown in Figure 7 as the center, the light emitting point width (i.e., light emitting area) becomes smaller, and as the object blocking sunlight moves closer to the sun (light source in the case of the sunlight filtering through trees simulation control device 100), the light emitting point width (i.e., light emitting area) becomes larger.

[0044] The light emission number fluctuation data generating circuit 6 generates and outputs light emission fluctuation data for controlling the light emission number (i.e., the light emission width of the multiple light sources 1) so as to simulate a state in which an object (e.g., a tree branch or a tree leaf) blocking sunlight is swaying in the Z-axis direction. For example, the light emission number fluctuation data generating circuit 6 generates and outputs light emission fluctuation data for controlling the turning on and off of the light source 1, such as enlarging or reducing an image.

[0045] FIG. 8 is a diagram showing an example of the occurrence frequency of the number of lights emitted by the multiple light sources 1 arranged in the Z-axis direction (that is, the light emission widths of the multiple light sources 1). The light emission number fluctuation data generating circuit 6 determines the fluctuation, for example, as shown in Fig. 8. When the central light source among the multiple light sources 1 arranged in the Z-axis direction is set to "0", the light emission number fluctuation data generating circuit 6 generates and outputs light emission fluctuation data for controlling each light source 1 so that the number of lights changes frequently to +1 on the positive side of the light emission number and frequently to -1 on the negative side.

[0046] On the other hand, the light emission number fluctuation data generation circuit 6 generates and outputs light emission fluctuation data for controlling each light source 1 so that the frequency with which the light emission number changes from +1 to +2 is reduced, generates and outputs light emission fluctuation data for controlling each light source 1 so that the frequency with which the light emission number changes from -1 to -2 is reduced, and generates and outputs light emission fluctuation data for controlling the light source 1 so that the frequency with which the light emission number changes at the "0" position is reduced.

[0047] By such control, the sunlight filtering simulation control device 100 realizes a fluctuation control where the object blocking the sunlight sways stably with a high frequency and where the unstable swaying state occurs with a low frequency. In other words, if the number of lights emitted is controlled to be maintained at "0" with the highest frequency, and the number of lights emitted changes less frequently up to +2 on the positive side and less frequently up to -2 on the negative side, it is possible to simulate a state where the object blocking the sunlight does not sway but sways occasionally.

[0048] The lighting retention time fluctuation data generating circuit 5 outputs fluctuation data for controlling the retention time of each light emitting state that changes the lighting state from a positive change to a negative change to the light emitting lighting order fluctuation data generating circuit 7 and the light emitting number fluctuation data generating circuit 6. For example, when the light emitting lighting order fluctuation data generating circuit 7 determines the change control from +2 to -2 shown in Fig. 5, the lighting retention time fluctuation data generating circuit 5 outputs fluctuation data for controlling the retention time of the light emitting states of +2, +1, 0, -1, and -2 to the light emitting lighting order fluctuation data generating circuit 7 and the light emitting number fluctuation data generating circuit 6. By controlling the retention time of this light emitting state, it is possible to simulate the period of swaying of an object (e.g., a tree branch or a tree leaf) that blocks sunlight.

[0049] FIG. 9 is a graph showing a relationship between the time during which the light emitting state is maintained and the occurrence frequency. The illumination retention time fluctuation data generating circuit 5 generates the fluctuation data by determining the occurrence frequency, for example, as shown in Fig. 9. By controlling the frequency of occurrence of a state in which the light-emitting state is maintained for a long time to be high and the frequency of occurrence of a state in which the light-emitting state is maintained for a short time to be low, it is possible to simulate a state in which an object blocking sunlight (e.g., tree branches and leaves) steadily sways with a long period (i.e., a state of slow movement) and an object blocking sunlight sways with a short period (i.e., a state of violent movement) rarely (e.g., a state in which a gust of wind blows).

[0050] As described above, according to this embodiment, it is possible to simulate the direction, range, and period of change in the movement of the projected image of sunlight filtering through the trees that is visually recognized by a person. For example, when an object blocking the light source 1 moves laterally due to wind or the like, the sunlight filtering through the trees when the distance between the object blocking the light source and the light source 1 changes due to wind or the like is simulated. This makes it possible to simulate the sunlight filtering through the trees caused by changes due to the lateral movement of a twig or the vertical movement of a branch.

[0051] Embodiment 3 FIG. 10 is a block diagram illustrating a schematic configuration of a sunlight filtering simulation control device 100 according to the third embodiment of the present disclosure. In the third embodiment, the sunlight filtering light source control module 3 of the sunlight filtering simulation control device 100 has at least one light source drive circuit 4, a lighting hold time fluctuation data generation circuit 5, a light emission number fluctuation data generation circuit 6, a light emission lighting order fluctuation data generation circuit 7, a light source illuminance fluctuation data generation circuit 8, and a brightness boost light source control fluctuation data generation circuit 9. The light source drive circuit 4 is composed of, for example, a plurality of light source drive circuits.

[0052] The output from the light emission lighting order fluctuation data generation circuit 7 is input to the light emission number fluctuation data generation circuit 6. The light emission number fluctuation data generation circuit 6 outputs a command to control the turning on and off of the multiple light sources 1, and this output is input to the light source illuminance fluctuation data generation circuit 8 and the brightness boost light source control fluctuation data generation circuit 9. The output from the brightness boost light source control fluctuation data generation circuit 9 is input to the light source illuminance fluctuation data generation circuit 8. The output from the light source illuminance fluctuation data generation circuit 8 is input to the light source drive circuit 4. The light source drive circuit 4 drives the multiple light sources 1 to turn on or off.

[0053] The lighting retention time fluctuation data generation circuit 5 determines and outputs the retention time for the state in which the multiple light sources 1 are turned on or off. The output from the lighting retention time fluctuation data generation circuit 5 is input to the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, and the light source illuminance fluctuation data generation circuit 8. As a result, the outputs from the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, and the light source illuminance fluctuation data generation circuit 8 are updated.

[0054] As a device for simulating sunlight filtering through the trees, the sunlight filtering through the trees simulation control device 100 of embodiment 2 can simulate the swaying of objects that block sunlight (e.g., tree branches and leaves), whereas the sunlight filtering through the trees simulation control device 100 of embodiment 3 can simulate changes in illuminance of light filtering through objects that block sunlight.

[0055] The area through which light leaks from an object blocking sunlight actually changes subtly from moment to moment, and the amount of luminous flux leaking out changes depending on the area. In addition to the area through which light leaks out, the brightness also changes when the sunlight itself is obscured by clouds. Even if the size of each of the multiple light sources 1 is the same, the multiple light sources 1 can be controlled so that the illuminance fluctuates when turned on, thereby simulating the change in the illuminance of sunlight filtering through the trees. For example, the sunlight filtering through the trees light source control module 3 changes the illuminance of each of the multiple light sources 1 at a predetermined timing (also called the "first timing"). This allows the sunlight filtering through the trees simulation control device 100 to simulate the change in the illuminance of light leaking through an object blocking sunlight.

[0056] The commands generated by the light emission lighting order fluctuation data generation circuit 7 and the light emission number fluctuation data generation circuit 6 are input to a light source illuminance fluctuation data generation circuit 8. The light source illuminance fluctuation data generation circuit 8 determines the illuminance of each light source 1 when turned on, and an output indicating the determined illuminance is input to the light source drive circuit 4.

[0057] FIG. 11 is a graph showing a schematic relationship between the amount of change from the previous brightness to the next brightness and the occurrence frequency. The data occurrence frequency set by the light source illuminance fluctuation data generating circuit 8 is shown in Fig. 11, for example. The light source illuminance fluctuation data, whose brightness is updated according to the output timing of the illumination retention time fluctuation data generating circuit 5, is set to occur more frequently as the absolute value of the amount of change from the brightness before the update to the next brightness after the update is smaller, and is set to occur less frequently as the absolute value of the amount of change is larger. This setting makes it possible to simulate the situation in nature, where small changes usually continue without major changes, but where changes rarely occur.

[0058] The luminance boost light source control fluctuation data generating circuit 9 simulates a state where the light suddenly sparkles more than usual. For example, the luminance boost light source control fluctuation data generating circuit 9 simulates a state where the light sparkles more than usual when a reflective object is present in an object blocking the sunlight. In this case, the light source 1 designated to be turned on by the light emission lighting order fluctuation data generating circuit 7 and the light emission number fluctuation data generating circuit 6 is made to emit light more strongly at a timing (also referred to as "second timing") different from the data update timing (e.g., first timing) of the lighting retention time fluctuation data generating circuit 5.

[0059] For example, when simulating a state where the sunlight filtering through the trees simulation control device 100 is more dazzling than usual, the sunlight filtering through the trees light source control module 3 increases the illuminance of any one of the multiple light sources 1 at a predetermined second timing to a higher illuminance than the highest illuminance at the first timing. This allows the sunlight filtering through the trees simulation control device 100 to simulate a state where the sunlight filtering through the trees simulation control device 100 is more dazzling than usual.

[0060] Embodiment 4 FIG. 12 is a block diagram illustrating a schematic configuration of a sunlight filtering simulation control device 100 according to the fourth embodiment of the present disclosure. In the fourth embodiment, the sunlight filtering light source control module 3 of the sunlight filtering simulation control device 100 has a light source drive circuit 4, a lighting hold time fluctuation data generation circuit 5, a light emission number fluctuation data generation circuit 6, a light emission lighting order fluctuation data generation circuit 7, a light source illuminance fluctuation data generation circuit 8, a brightness boost light source control fluctuation data generation circuit 9, and a disturbance input block 10. The light source drive circuit 4 is composed of, for example, a plurality of light source drive circuits.

[0061] The sunlight filtering through the trees simulation control device 100 according to the fourth embodiment differs from the sunlight filtering through the trees simulation control device 100 according to the third embodiment in that the sunlight filtering through the trees light source control module 3 has a disturbance input block 10.

[0062] The disturbance input block 10 is, for example, a pressure sensor that measures pressure in the positive and negative directions on each of the three axes X, Y and Z. In this case, the pressure sensor measures wind pressure in each direction and outputs measurement data.

[0063] The disturbance input block 10 may be, for example, a wind speed sensor that measures wind speed in the positive and negative directions on each of the three axes X, Y, and Z. In this case, the wind speed sensor measures the wind speed in each direction and outputs the measurement data.

[0064] The output from the light emission lighting order fluctuation data generation circuit 7 is input to the light emission number fluctuation data generation circuit 6. A command for controlling the turning on and off of the multiple light sources 1 is output from the light emission number fluctuation data generation circuit 6 and input to the light source illuminance fluctuation data generation circuit 8 and the brightness boost light source control fluctuation data generation circuit 9.

[0065] The output from the brightness boost light source control fluctuation data generation circuit 9 is input to a light source illuminance fluctuation data generation circuit 8, and the output from the light source illuminance fluctuation data generation circuit 8 is input to a light source drive circuit 4. The light source drive circuit 4 drives the multiple light sources 1 to turn them on or off.

[0066] The lighting retention time fluctuation data generation circuit 5 determines and outputs the retention time for the state in which the multiple light sources 1 are turned on or off. The output from the lighting retention time fluctuation data generation circuit 5 is input to the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, and the light source illuminance fluctuation data generation circuit 8. As a result, the outputs from the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, and the light source illuminance fluctuation data generation circuit 8 are updated.

[0067] The sunlight filtering light source control module 3 corrects the light emission lighting order fluctuation data, light emission fluctuation data, and fluctuation data using the measurement data measured by the disturbance input block 10. Specifically, the output from the disturbance input block 10 is input to the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, the light retention time fluctuation data generation circuit 5, and the light source illuminance fluctuation data generation circuit 8, and the data generated by these circuits is corrected.

[0068] The measurement data output corresponding to the XY axis directions detected by the disturbance input block 10 is input to the light emission lighting sequence fluctuation data generation circuit 7, and the measurement data output corresponding to the Z axis direction is input to the light emission number fluctuation data generation circuit 6.

[0069] The sunlight filtering light source control module 3 corrects the illuminance of each of the multiple light sources 1 that changes at the first timing, using the measurement data measured by the disturbance input block 10. In this case, for example, the disturbance input block 10 outputs the average value or maximum absolute value data of the absolute value measurement data in the XYZ directions to the light-on retention time fluctuation data generation circuit 5 and the light source illuminance fluctuation data generation circuit 8.

[0070] FIG. 13 is a diagram showing an example of the occurrence frequency of lighting of a plurality of light sources 1. In FIG. As the wind speed disturbance or wind pressure disturbance in the X-axis and Y-axis directions increases, the light emission lighting sequence fluctuation generating circuit 7 determines the fluctuation as shown in FIG. 13 based on the data output occurrence frequency shown in FIG. 6, for example.

[0071] Because disturbance inputs become large in the X-axis and Y-axis directions, the sunlight filtering light source control module 3 performs fluctuating control so that the lighting order, centered on the "0" position shown in Fig. 5, frequently lights up to +5 on the positive side and frequently lights up to -5 on the negative side, and does not light up at the "0" position. This allows the sunlight filtering simulation control device 100 to simulate fluctuations in which an object blocking sunlight frequently swings widely and a fixed state rarely occurs.

[0072] FIG. 14 is a diagram showing an example of the occurrence frequency of lighting of a plurality of light sources 1. In FIG. As the wind speed disturbance or wind pressure disturbance in the Z-axis direction increases, the light emission number fluctuation data generating circuit 6 determines the fluctuation as shown in Fig. 14 from the data output occurrence frequency shown in Fig. 8, for example, and operates. Since the disturbance input in the Z-axis direction increases, the sunlight filtering light source control module 3 performs control to fluctuate so that the number of lights or the light emission width changes frequently up to +2 on the positive side of the number of lights or the light emission width, centered on "0" shown in Fig. 7, and the number of lights or the light emission width changes frequently up to -2 on the negative side, so that the number of lights or the light emission width does not change at the "0" position. This allows the sunlight filtering simulation control device 100 to simulate fluctuations in which an object blocking sunlight frequently swings widely and in which a fixed state occurs infrequently.

[0073] FIG. 15 is a graph showing a relationship between the time for which the light emitting state is maintained and the occurrence frequency. As the wind speed disturbance or wind pressure disturbance in the XYZ directions increases, the illumination retention time fluctuation data generating circuit 5 determines and operates the data output occurrence frequency as shown in Fig. 15 from the data output occurrence frequency shown in Fig. 9, for example. By controlling the frequency of occurrence of a state in which the light-emitting state is held for a short time to increase and the frequency of occurrence of a state in which the light-emitting state is held for a long time to decrease, it is possible to simulate a state in which an object blocking sunlight (e.g., tree branches, leaves) sways in a short cycle (i.e., a state in which the object moves violently) and a state in which the object blocking sunlight sways in a long cycle (i.e., a state in which the object moves slowly) is unlikely to occur.

[0074] FIG. 16 is a graph showing a rough relationship between the amount of change (absolute value) from the previous brightness to the next brightness and the occurrence frequency. The larger the wind speed disturbance or wind pressure disturbance in the XYZ directions, the light source illuminance fluctuation data generating circuit 8 operates by determining the data output occurrence frequency as shown in Fig. 16 from the data output occurrence frequency shown in Fig. 11, for example. The light source illuminance fluctuation data, whose brightness is updated according to the output timing of the illumination retention time fluctuation data generating circuit 5, is set to occur more frequently as the absolute value of the change in brightness from the brightness before the update to the next brightness after the update increases, and to occur less frequently as the absolute value of the change in brightness decreases. It is possible to simulate the increase in the change in luminous flux or illuminance caused by sunlight leaking when the range of movement of an object (e.g., tree branches, leaves) that blocks sunlight due to a disturbance becomes large and the period of movement becomes faster.

[0075] As described above, according to this embodiment, for example, by making corrections according to the input level (e.g., wind strength) such as shortening the lighting time retention fluctuation data range, increasing the light emission lighting order fluctuation data range, widening the light emission number fluctuation data range, and increasing the light source illuminance fluctuation data range, it is possible to simulate the drastic changes in the sunlight filtering through the trees when the wind gets stronger.

[0076] Embodiment 5. FIG. 17 is a block diagram illustrating a schematic configuration of a sunlight filtering simulation control device 100 according to the fifth embodiment of the present disclosure. In the fifth embodiment, the sunlight filtering through trees simulation control device 100 has a lens position driving unit 11 in addition to a plurality of light sources 1, a lens 2, and a sunlight filtering through trees light source control module 3.

[0077] The sunlight filtering through the trees simulation control device 100 according to the fifth embodiment differs from the sunlight filtering through the trees simulation control device 100 according to the fourth embodiment in that a lens position driving unit 11 is provided.

[0078] The lens position driving unit 11 holds the position of the lens 2 and adjusts the distance between the lens 2 and the multiple light sources 1. The lens position driving unit 11 has, for example, a driving circuit capable of adjusting the position of the lens 2. The lens position driving unit 11 may be, for example, a motor such as a linear motor capable of adjusting the position of the lens 2.

[0079] The light emission lighting sequence fluctuation data generation circuit 7 outputs commands for controlling the turning on and off of the multiple light sources 1 to the light source illuminance fluctuation data generation circuit 8 and the brightness boost light source control fluctuation data generation circuit 9. The output from the light emission lighting sequence fluctuation data generation circuit 7 is input to the light source illuminance fluctuation data generation circuit 8 and the brightness boost light source control fluctuation data generation circuit 9.

[0080] The output from the brightness boost light source control fluctuation data generation circuit 9 is input to a light source illuminance fluctuation data generation circuit 8, and the output from the light source illuminance fluctuation data generation circuit 8 is input to a light source drive circuit 4. The light source drive circuit 4 drives the multiple light sources 1 to turn them on or off.

[0081] The lighting retention time fluctuation data generation circuit 5 determines and outputs the retention time for the state in which the multiple light sources 1 are turned on or off. The output from the lighting retention time fluctuation data generation circuit 5 is input to the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, and the light source illuminance fluctuation data generation circuit 8. As a result, the outputs from the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, and the light source illuminance fluctuation data generation circuit 8 are updated.

[0082] The sunlight filtering light source control module 3 corrects the light emission lighting order fluctuation data, light emission fluctuation data, and fluctuation data using the measurement data measured by the disturbance input block 10. Specifically, the output from the disturbance input block 10 is input to the light emission lighting order fluctuation data generation circuit 7, the light emission number fluctuation data generation circuit 6, the light retention time fluctuation data generation circuit 5, and the light source illuminance fluctuation data generation circuit 8, and the data generated by these circuits is corrected.

[0083] The sunlight filtering light source control module 3 outputs a command to adjust the distance between the lens 2 and the multiple light sources 1 to the lens position drive unit 11. That is, the sunlight filtering light source control module 3 controls the lens position drive unit 11. For example, an output from the light emission number fluctuation data generation circuit 6 is input to the lens position drive unit 11. As a result, the lens position drive unit 11 adjusts the distance between the lens 2 and the multiple light sources 1 based on the command from the sunlight filtering light source control module 3.

[0084] The light emission number fluctuation data generating circuit 6 controls the distance between the lens 2 and the multiple light sources 1 without controlling the number of light emission sources that simulate sunlight filtering through the trees. This makes it possible to simulate, for example, a change in the pattern of sunlight filtering through the trees as shown in FIG.

[0085] As described above, according to this embodiment, by controlling the distance A between the light source 1 and the lens 2 with the fluctuation data of the number of emissions of the light source 1, it is possible to simulate the change in the distance between the light source 1 and an object blocking the light source 1, and to simulate the sunlight filtering through the trees with a blurred feeling. In other words, since there is no need to directly control the number of emissions of the light source 1, and it is possible to obtain an analog change in the light emission area rather than a digital change in the number of emissions (i.e., the light emission area), it is possible to simulate the sunlight filtering through the trees more naturally.

[0086] The features of each of the embodiments and modifications described above can be combined with each other. [Explanation of symbols]

[0087] 1 light source, 2 lens, 3 sunlight filtering through trees light source control module, 4 light source driving circuit, 5 light emission hold time fluctuation data generation circuit, 6 light emission number fluctuation data generation circuit, 7 light emission lighting order fluctuation data generation circuit, 8 light source illuminance fluctuation data generation circuit, 9 brightness boost light source control fluctuation data generation circuit, 10 disturbance input block, 11 lens position driving unit, 100 sunlight filtering through trees simulation control device.

Claims

1. A single lens; A plurality of light sources arranged parallel to a central axis perpendicular to the optical axis of the lens; a lens position driving unit for adjusting a distance between the lens and the plurality of light sources; a sunlight filtering light source control module that outputs a command to the lens position driver to adjust a distance between the lens and the plurality of light sources; Equipped with When the focal length of the lens is F and the distance from the central axis to each of the plurality of light sources is A, the lens position driving unit adjusts the distance between the lens and the plurality of light sources so as to satisfy F<A based on a command from the sunlight filtering light source control module. Sunlight filtering through trees simulation control device.

2. When the distance from the central axis to each of the plurality of light sources is C, A≦C, and (A×F) / (A−F)<(2×C×F) / (C−F) 2. The sunlight filtering simulation control device according to claim 1, which satisfies the above condition.

3. The sunlight filtering light source control module includes: Light emission lighting sequence fluctuation data that determines a lighting sequence or a lighting-out sequence of the plurality of light sources; Light emission fluctuation data for determining which light source is to emit light among the plurality of light sources; Fluctuation data for determining the time for which the plurality of light sources are kept on or off; having Using the light emission lighting sequence fluctuation data, a lighting sequence or an extinguishing sequence of the plurality of light sources is controlled; Using the light emission fluctuation data, control the light source to emit light; Using the fluctuation data, a time for which the plurality of light sources are kept on or off is controlled. The sunlight filtering through trees simulation control device according to claim 1 or 2.

4. 3. The sunlight filtering simulation control device according to claim 1, wherein the sunlight filtering light source control module changes the illuminance of each of the plurality of light sources at a first timing, and increases the illuminance of any of the plurality of light sources to a higher illuminance than the highest illuminance at the first timing at a second timing different from the first timing.

5. The sunlight filtering light source control module has a disturbance input block for measuring wind speed or pressure, The sunlight filtering light source control module corrects the light emission lighting order fluctuation data, the light emission fluctuation data, and the fluctuation data using measurement data measured by the disturbance input block. The sunlight filtering through trees simulation control device according to claim 3.

6. The sunlight filtering light source control module has a disturbance input block for measuring wind speed or pressure, The sunlight filtering light source control module corrects the illuminance of each of the plurality of light sources that changes at the first timing by using the measurement data measured by the disturbance input block. The sunlight filtering through trees simulation control device according to claim 4.

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