Lighting device

Abstract

To achieve downsizing while improving light extraction efficiency.SOLUTION: A luminaire A1 includes a first LED array 21, a second LED array 22, a first lens block 31, a second lens block 32, and a diffusion member 4. The first LED array 21 has a line-like light emitting region. The second LED array 22 has a line-like light emitting region and is adjacent to the first LED array 21. The first lens block 31 controls a light distribution of the light radiated from the first LED array 21. The second lens block 32 controls the light distribution of the light radiated from the second LED array 22. The diffusion member 4 opposes to an emission surface 312 of the first lens block 31 and an emission surface 322 of the second lens block 32. A light distribution characteristic of the first lens block 31 and a light distribution characteristic of the second lens block 32 are different from each other.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a lighting device, and more particularly, to a lighting device for effect lighting.

Background Art

[0002] As a conventional example, the lighting device described in Patent Document 1 is exemplified. The lighting device described in Patent Document 1 (hereinafter referred to as the conventional example) is used for the application (effect lighting) of illuminating a wall surface (horizon surface) serving as a background in a television shooting studio or a stage.

[0003] The conventional example includes a light source unit, a power supply unit that supplies power to the light source unit, and a support unit that supports the light source unit with an adjustable angle relative to the power supply unit. The light source unit includes a housing, a light emitting module housed in the housing, and a reflection device.

[0004] The light emitting module includes a horizontally elongated substrate and a plurality of light emitting elements (LEDs or organic EL elements) mounted on one surface of the substrate. The reflection device includes a first reflector and a second reflector. The housing includes a case having an opening on an upper surface which is one surface thereof, and a prism lens disposed to cover the opening of the case.

[0005] In the conventional example, when the light emitting element emits light, the light traveling in the optical axis direction from the light emitting element passes through the prism lens and is directly irradiated onto the light irradiation surface (wall surface) as direct light. Further, the light traveling from the light emitting element toward the first reflector is reflected by the reflection surface of the first reflector, then passes through the prism lens and is emitted. Furthermore, the light traveling from the light emitting element toward the second reflector is reflected by the reflection surface of the second reflector, passes through the prism lens and is emitted.

Prior Art Literature

Patent Literature

[0006]

Patent Literature 1

Summary of the Invention

[0007] In conventional structures where the light distribution of a light-emitting element is controlled by a reflector, it is difficult to improve the efficiency of light extraction, and it is also difficult to miniaturize the lighting device.

[0008] The purpose of this disclosure is to provide a lighting device that can be miniaturized while improving the light extraction efficiency. [Means for solving the problem]

[0009] An illumination device according to one aspect of the present disclosure comprises a first light source having a linear light-emitting region and a second light source having a linear light-emitting region and adjacent to the first light source. The illumination device comprises a first lens block for controlling the light distribution of light emitted from the first light source and a second lens block for controlling the light distribution of light emitted from the second light source. The illumination device comprises a diffusion member facing the emission surface of the first lens block and the emission surface of the second lens block. The light distribution characteristics of the first lens block and the light distribution characteristics of the second lens block are different. The light distribution characteristics of the first lens block have a first light distribution characteristic and a second light distribution characteristic, the first light distribution characteristic is biased toward the direction approaching the second lens block, and the second light distribution characteristic is biased toward the direction away from the second lens block. The first light source comprises a substrate and a plurality of first light-emitting elements mounted on the substrate. The second light source comprises a plurality of second light-emitting elements mounted on the substrate. The first lens block and the second lens block are integrally formed with a flat base from a translucent material. The first lens block and the second lens block are provided on the rear surface of the base. On the rear surface of the base, a plurality of ribs are provided that protrude rearward from between the first lens block and the second lens block and abut against the substrate. [Effects of the Invention]

[0010] The lighting device described herein has the effect of being able to be miniaturized while improving the efficiency of light extraction. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a front view of a lighting device according to an embodiment of the present disclosure. [Figure 2] Figure 2 is a right side view of the same lighting device. [Figure 3]Figure 3 is a rear view of the same lighting device. [Figure 4] Figure 4 is an exploded perspective view of the light source unit in the same lighting device. [Figure 5] Figure 5 is a side view of the same light source unit with the end plate omitted. [Figure 6] Figure 6 is a rear view of the same light source unit with a portion of the lens unit omitted. [Figure 7] Figure 7 is an explanatory diagram illustrating the light distribution control of the lens unit in the same light source unit. [Figure 8] Figure 8 is a side view of the lighting device in use. [Figure 9] Figure 9A shows the light distribution characteristics of the first lens block in the lens unit shown above. Figure 9B shows the light distribution characteristics of the lens unit shown above, including the first lens block and the diffusion member. [Figure 10] Figure 10A shows the light distribution characteristics of the second lens block in the same lens unit. Figure 10B shows the light distribution characteristics including the second lens block and the diffusion member in the same lens unit. [Figure 11] Figure 11 shows the light distribution characteristics of the lens unit and diffusion member combined. [Modes for carrying out the invention]

[0012] Hereinafter, a lighting device according to an embodiment of this disclosure will be described in detail with reference to the drawings. However, the figures described in the following embodiments are schematic diagrams, and the ratios of the size and thickness of each component do not necessarily reflect the actual dimensional ratios. Furthermore, the configuration described in the following embodiments is merely one example of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0013] (1) Overview The lighting device A1 according to an embodiment of the present disclosure includes a first light source (first LED array 21), a second light source (second LED array 22), a first lens block 31, a second lens block 32, and a diffusion member 4 (see FIGS. 1 to 4). The first light source (first LED array 21) has a linear light-emitting region. The second light source (second LED array 22) has a linear light-emitting region and is adjacent to the first light source (first LED array 21). The first lens block 31 controls the light distribution of light emitted from the first light source (first LED array 21). The second lens block 32 controls the light distribution of light emitted from the second light source (second LED array 22). The diffusion member 4 faces the exit surface of the first lens block 31 and the exit surface of the second lens block 32. The light distribution characteristic of the first lens block 31 is different from that of the second lens block 32.

[0014] Accordingly, the lighting device A1 according to an embodiment of the present disclosure includes the first lens block 31 that controls light distribution of the first light source (first LED array 21), and the second lens block 32 that controls light distribution of the second light source (second LED array 22). Therefore, compared with conventional technologies that use a reflector to control light distribution, the lighting device A1 according to an embodiment of the present disclosure can achieve size reduction while improving the light extraction efficiency of the first light source (first LED array 21) and the second light source (second LED array 22). Moreover, since the lighting device A1 according to an embodiment of the present disclosure has different light distribution characteristics between the first lens block 31 and the second lens block 32, it can expand the light irradiation range while improving the uniformity of light on the irradiation surface.

[0015] (2) Details Illuminating device A1 according to an embodiment of the present disclosure (hereinafter abbreviated as illuminating device A1) comprises a light source unit B1 and a control unit C1, as shown in Figures 1 to 3. It should be noted that illuminating device A1 is a so-called cyclorama light (lower cyclorama light) that is used for the purpose (effect lighting, stage lighting) of illuminating a wall surface (cyclorama surface) serving as a background such as a photography studio or a stage of a television station, similar to conventional examples. However, the illuminating device according to the embodiment may be an upper cyclorama light that illuminates a wall surface from above, and may also be an illuminating device for effect lighting or stage lighting other than cyclorama lights.

[0016] (2-1) Control Unit The control unit C1 comprises a metal housing 7, a power supply device and a control device accommodated in the housing 7, and a pair of arms 70 (see Figures 1 to 3).

[0017] The power supply device has a power conversion circuit that converts AC power supplied from a commercial power system into DC power. The power conversion circuit is formed of, for example, a switching power supply circuit including a semiconductor switching element.

[0018] The control device has a microcontroller as a main component. The control device also includes a communication circuit for communicating with an external controller (e.g., a dimming console). The communication circuit has a function of transmitting and receiving digital control signals (hereinafter referred to as DMX signals) compliant with a communication standard suitable for illumination control, for example, DMX (Digital Multiplex) 512A. However, the communication circuit may also have a function of transmitting and receiving control signals compliant with communication standards other than DMX512A, for example, DALI (Digital Addressable Lighting Interface: registered trademark), or wired LAN standards such as 100BASE-T and 1000BASE-T.

[0019] The control unit, by executing a lighting control program using a microcontroller, controls the power supply in response to commands received from an external controller via a communication circuit, and performs functions such as blinking, dimming, and color adjustment of the light source unit B1.

[0020] The housing 7 is formed from metal plates into a long, box-like shape. The power supply unit and control unit are housed inside the housing 7. A trapezoidal protrusion 71 is formed at one end of the shorter side of the upper surface of the housing 7 (see Figure 2).

[0021] Each of the pair of arms 70 is formed in an arc shape from a metal plate. An arc-shaped groove 700 runs through each of the arms 70 in the direction of its thickness. The pair of arms 70 are screwed to both ends in the longitudinal direction of the housing 7 by two thumb screws 72, one of which is inserted through each groove 700. The front ends of the pair of arms 70 are fixed to the rear surface of the main body 1 of the light source unit B1, which will be described later (see Figures 2 and 3).

[0022] (2-2) Light source unit The light source unit B1 comprises a main body 1, two LED modules 2, a lens unit 3, and a diffusion member 4 (see Figure 4). In the following description, unless otherwise specified, the front, back, left, right, and up and down directions indicated by arrows in Figure 4 are defined as the front, back, left, right, and up and down directions of the light source unit B1.

[0023] (2-2-1) Main body The main unit 1 comprises a mounting base 10 to which two LED modules 2, a lens unit 3, and a diffusion member 4 are attached, and a pair of end plates 18 (see Figures 4 and 5).

[0024] The mounting base 10 has a pair of side plates 11, a support part 12, a plurality of heat sinks 13, and a bottom plate 14, and is made of a material with good thermal conductivity such as aluminum or an aluminum alloy (see Figure 5). Each of the pair of side plates 11 is formed in the shape of a rectangular plate. However, of the pair of side plates 11, the lower side plate 11 is sometimes called the lower side plate 11D, and the upper side plate 11 is sometimes called the upper side plate 11U.

[0025] A first retaining portion 111 and a second retaining portion 112 are provided at the front ends of a pair of side plates 11. The first retaining portion 111 and the second retaining portion 112 are each formed in a trough shape. The second retaining portion 112 is located at the front end of each side plate 11. The first retaining portion 111 is located behind the second retaining portion 112 on each side plate 11.

[0026] The support portion 12 is formed in the shape of a rectangular flat plate and protrudes perpendicularly from the upper plate 11U from approximately the center in the short direction (front-to-back direction) of the upper plate 11U (see Figures 4 and 5). Two LED modules 2 are supported on the front surface of the support portion 12, arranged side by side in the longitudinal direction (left-to-right direction) (see Figure 4). Preferably, the two LED modules 2 are fixed to the support portion 12 by, for example, screwing the substrate 20 to the support portion 12.

[0027] Each of the multiple heat sinks 13 is formed in the shape of a rectangular flat plate. The multiple heat sinks 13 are arranged with gaps between them in the vertical direction and protrude perpendicularly from the rear surface of the support portion 12. However, one of the multiple heat sinks 13 is formed in the shape of an L when viewed from the left-right direction (see Figure 5).

[0028] The base plate 14 is formed in a rectangular, flat shape and connects the rear end of the lowest heat sink 13 to the rear end of the lower side plate 11D. A through hole is provided in the center of the longitudinal direction of the base plate 14. A gasket 15 is fitted into this through hole. The gasket 15 protects the cable 16 (see Figure 4) that electrically connects the two LED modules 2 and the power supply of the control unit C1.

[0029] The pair of end plates 18 are formed in the same way as the mounting base 10, using a material with good thermal conductivity to create rectangular flat plates. One end plate 18 is fixed to one end (left end) in the longitudinal direction of the mounting base 10. The other end plate 18 is fixed to the other end (right end) in the longitudinal direction of the mounting base 10.

[0030] (2-2-2) LED module The two LED modules 2 have a common configuration. Each LED module 2 includes a rectangular substrate 20, a plurality of first LEDs 210, and a plurality of second LEDs 220.

[0031] The multiple first LEDs 210 are, for example, packaged LEDs. The multiple first LEDs 210 are mounted in a single row along the longitudinal direction (left-right direction) of the substrate 20 at one end (bottom end) in the short direction (up-down direction) on the front (mounting surface) of the substrate 20. However, the multiple first LEDs 210 may be mounted in a zigzag pattern, for example. The multiple first LEDs 210 form a line-shaped light-emitting region. Here, the multiple first LEDs 210 each contain multiple LEDs that emit light of multiple different colors (for example, red, green, blue, white, etc.). In the following description, these multiple first LEDs 210 will be collectively referred to as the first LED array 21.

[0032] The multiple second LEDs 220, like the first LEDs 210, are packaged LEDs. The multiple second LEDs 220 are mounted in a single row along the longitudinal direction of the substrate 20 on the other end (upper end) of the short side of the front surface of the substrate 20. However, the multiple second LEDs 220 may be mounted in a zigzag pattern, for example. The multiple second LEDs 220 form a line-shaped light-emitting region. Here, like the multiple first LEDs 210, each of the multiple second LEDs 220 contains multiple LEDs that emit light of multiple different colors (for example, red, green, blue, white, etc.). In the following description, these multiple second LEDs 220 will be collectively referred to as the second LED array 22. Furthermore, the substrate on which the multiple first LEDs 210 are mounted and the substrate on which the multiple second LEDs 220 are mounted may be separate and independent substrates.

[0033] (2-2-3) Diffusion member The diffusion member 4 is formed in the shape of a rectangular flat plate from a translucent synthetic resin material such as acrylic resin or polycarbonate resin (see Figures 4 and 5).

[0034] The diffusion member 4 is configured to diffuse transmitted light by filling a synthetic resin material with a filler such as titanium dioxide, glass beads, or mica, for example. Alternatively, the diffusion member 4 may be configured to diffuse transmitted light by having an uneven or textured surface or both front and back surfaces.

[0035] (2-2-4) Lens Unit The lens unit 3 includes a first lens block 31, a second lens block 32, a base 30, and a plurality of ribs 33 (see Figures 5 and 6). The first lens block 31, the second lens block 32, the base 30, and the plurality of ribs 33 are integrally formed as a molded body of a translucent synthetic resin such as acrylic resin or polycarbonate resin.

[0036] The base 30 is formed in the shape of a rectangular flat plate. A first lens block 31 and a second lens block 32 are provided on the rear surface of the base 30. The first lens block 31 is provided on the lower side of the rear surface of the base 30 along the longitudinal direction of the base 30. The second lens block 32 is provided on the upper side of the rear surface of the base 30 along the longitudinal direction of the base 30. Therefore, the front surface of the base 30 becomes the emission surface of the first lens block 31 and the second lens block 32.

[0037] The second lens block 32 controls the light distribution of the second LED array 22. The second lens block 32 has a light-gathering section 320 and a pair of reflecting sections 321. The light-gathering section 320 is a collimator lens and controls the light distribution so that a portion of the light emitted from the second LED array 22 (hereinafter sometimes referred to as the second emitted light) is made closer to parallel light and emitted from the emission surface 322 (see Figure 7). The pair of reflecting sections 321 are mirror images of each other and are provided so as to sandwich the light-gathering section 320 from above and below. The pair of reflecting sections 321 are configured to internally totally reflect a portion of the second emitted light (see Figure 7).

[0038] The first lens block 31 also has a light-gathering section 310 and a reflecting section 311. The light-gathering section 310 of the first lens block 31 is a collimator lens. The first lens block 31 controls the light distribution so that a portion of the first radiated light (hereinafter sometimes referred to as the first radiated light) emitted from the first LED array 21 in the range above the optical axis of the first LED array 21 is made closer to parallel light and emitted from the emission surface 322 (see Figure 7). The reflecting section 311 is provided above the light-gathering section 310. The reflecting section 311 is configured to internally totally reflect a portion of the first radiated light emitted in the range above the optical axis of the first LED array 21 (see Figure 7). The first radiated light emitted in the range below the optical axis of the first LED array 21 is transmitted through the base 30 without being controlled by the first lens block 31 (see Figure 7).

[0039] Each of the multiple ribs 33 is formed in a cylindrical shape (see Figures 5 and 6). Each of the multiple ribs 33 protrudes vertically backward from between the first lens block 31 and the second lens block 32 on the rear surface of the base 30. The rear end of each of the multiple ribs 33 is located behind the rear ends of the first lens block 31 and the second lens block 32, respectively (see Figure 5).

[0040] (2-2-5) Assembly of the light source unit Next, we will explain the procedure for assembling the light source unit B1.

[0041] First, two LED modules 2 are mounted on the front surface of the mounting base 10. Next, the short ends of the base 30 of the lens unit 3 are inserted into a pair of first holding parts 111 of the mounting base 10 from one end of the mounting base 10 in the longitudinal direction. As a result, the lens unit 3 is held by the pair of first holding parts 111 (see Figure 5). At this time, the rear ends of the multiple ribs 33 of the lens unit 3 come into contact with the front surface of the substrate 20 of the LED module 2, thereby positioning the lens unit 3 relative to the LED module 2.

[0042] Next, both ends of the diffusion member 4 in the shorter direction are inserted into the pair of second holding parts 112 of the mounting base 10 from one end in the longitudinal direction of the mounting base 10. As a result, the diffusion member 4 is held by the pair of second holding parts 112 (see Figure 5).

[0043] Finally, a pair of end plates 18 are fixed to each end of the mounting base 10, completing the assembly of the light source unit B1.

[0044] The light source unit B1 is rotatably mounted to the housing 7 (the inclined surface of the protruding base 71) of the control unit C1 by two hinges 17 attached to the rear surface of the mounting base 10 (see Figures 2 and 3). However, the light source unit B1 is rotatable along the grooves 700 of the pair of arms 70 and is fixed in any position on the arms 70 by being tightened with two thumb screws 72.

[0045] (2-3) Operation of the lighting device As shown in Figure 8, the lighting device A1 is installed on the floor F1 of the shooting studio or stage and illuminates the background surface W1 (wall or backdrop) with light (first illumination light and second illumination light) to perform theatrical lighting.

[0046] The first LED array 21 and the second LED array 22 of the light source unit B1 are supplied with DC power from the power supply of the control unit C1 and emit first and second synchrotron radiation.

[0047] A portion of the first synchrotron radiation is directed to the first lens block 31, while the remainder is not directed to the first lens block 31. Curve α11 in Figure 9A shows the vertical (short-side direction of the lens unit 3) light distribution characteristics of the first lens block 31, and curve β11 in Figure 9A shows the horizontal (long-side direction of the lens unit 3) light distribution characteristics of the first lens block 31. In Figure 9A, the 0-degree axis coincides with the optical axis of the first LED array 21, the positive direction indicates upward (approaching the first lens block 31) and leftward, and the negative direction indicates downward (away from the first lens block 31) and rightward. As is clear from Figure 9A, there are two light distribution characteristics: a first light distribution characteristic and a second light distribution characteristic. The first light distribution characteristic is a light distribution characteristic biased towards approaching the second lens block 32 (upward). On the other hand, the second light distribution characteristic is a light distribution characteristic that is directed away from the second lens block 32 (downward). The lateral light distribution characteristic of the first lens block 31 is almost flat in the left-right direction (see curve β11).

[0048] The first synchrotron radiation that has passed through the lens unit 3 is then diffused by the diffusion member 4 and irradiated onto a relatively low position on the background surface W1 (see Figure 8). Curve α12 in Figure 9B shows the vertical light distribution characteristics of the first synchrotron radiation that has passed through the diffusion member 4, and curve β12 in Figure 9B shows the horizontal light distribution characteristics of the first synchrotron radiation that has passed through the diffusion member 4. As is clear from Figure 9B, the first synchrotron radiation that has been diffused by the diffusion member 4 is distributed slightly downward in the vertical direction relative to the optical axis of the first LED array 21.

[0049] However, the first synchrotron radiation emitted from the first LED array 21 is controlled to distribute light to the first lens block 31 and diffused by the diffusion member 4, thereby expanding the light irradiation range and improving the uniformity of light on the irradiated surface. The first synchrotron radiation contains light of different colors such as red light, green light, blue light, and white light, but these are diffused and mixed when they pass through the diffusion member 4. As a result, color unevenness of the first synchrotron radiation irradiated onto the background surface W1 is suppressed.

[0050] The second synchrotron radiation is light-distributed and controlled by the second lens block 32. Curve α21 in Figure 10A shows the vertical light distribution characteristics of the second lens block 32, and curve β21 in Figure 10A shows the horizontal light distribution characteristics of the second lens block 32. In Figure 10A, the 0-degree axis coincides with the optical axis of the second LED array 22, the positive direction indicates upward and leftward, and the negative direction indicates downward and rightward. As is clear from Figure 10A, the second synchrotron radiation, light-distributed and controlled by the second lens block 32, has a peak in light intensity close to the optical axis of the second LED array 22 (see curve α21). Note that the horizontal light distribution characteristics of the second lens block 32 are wider in the left-right direction compared to the vertical direction (see curve β21).

[0051] The second synchrotron radiation that has passed through the lens unit 3 is then diffused by the diffusion member 4 and irradiated onto a relatively high position on the background surface W1 (see Figure 8). Curve α22 in Figure 10B shows the vertical light distribution characteristics of the second synchrotron radiation that has passed through the diffusion member 4, and curve β22 in Figure 10B shows the horizontal light distribution characteristics of the second synchrotron radiation that has passed through the diffusion member 4. As is clear from Figure 10B, the second synchrotron radiation that has been diffused by the diffusion member 4 is distributed slightly upward in the vertical direction relative to the optical axis of the second LED array 22.

[0052] However, the second synchrotron radiation emitted from the second LED array 22 is controlled to distribute light to the second lens block 32 and diffused by the diffusion member 4, thereby expanding the light irradiation range and improving the uniformity of light on the irradiated surface. The second synchrotron radiation contains light of different colors such as red light, green light, blue light, and white light, but these are diffused and mixed when they pass through the diffusion member 4. As a result, color unevenness of the second synchrotron radiation irradiated onto the background surface W1 is suppressed.

[0053] Here, curve α31 in Figure 11 shows the vertical light distribution characteristics of the entire synchrotron radiation, which is a combination of the first and second synchrotron radiation transmitted through the diffusion member 4, and curve β31 in Figure 11 shows the horizontal light distribution characteristics of the entire synchrotron radiation transmitted through the diffusion member 4. As is clear from Figure 11, the illumination device A1 can expand the light irradiation range while improving the uniformity of light on the irradiation surface.

[0054] (3) Summary A lighting device (A1) according to a first aspect of this disclosure comprises a first light source (first LED array 21), a second light source (second LED array 22), a first lens block (31), a second lens block (32), and a diffusion member (4). The first light source has a linear light-emitting region. The second light source has a linear light-emitting region and is adjacent to the first light source. The first lens block (31) controls the light distribution of the light emitted from the first light source. The second lens block (32) controls the light distribution of the light emitted from the second light source. The diffusion member (4) faces the emission surface (312) of the first lens block (31) and the emission surface (322) of the second lens block (32). The light distribution characteristics of the first lens block (31) and the second lens block (32) are different.

[0055] The lighting device (A1) according to the first embodiment can be miniaturized while improving the light extraction efficiency of the first and second light sources compared to conventional examples that control light distribution using a reflector. Moreover, since the lighting device (A1) according to the first embodiment has different light distribution characteristics for the first lens block (31) and the second lens block (32), it is possible to expand the light irradiation range and improve the uniformity of light on the irradiated surface.

[0056] A lighting device (A1) according to a second aspect of this disclosure can be realized by combining it with the first aspect. In the lighting device (A1) according to the second aspect, it is preferable that the light distribution characteristics of the first lens block (31) are biased toward the direction away from the second lens block (32).

[0057] The illumination device (A1) according to the second embodiment can further expand the light irradiation range and further improve the uniformity of light on the irradiated surface.

[0058] A lighting device (A1) according to a third aspect of the present disclosure can be realized in combination with the first or second aspect. In the lighting device (A1) according to the third aspect, the light distribution characteristics of the second lens block (32) are preferably biased toward the direction away from the first lens block (31).

[0059] The third embodiment of the lighting device (A1) can further expand the light irradiation range while further improving the uniformity of light on the irradiated surface.

[0060] An illumination device (A1) according to a fourth aspect of the present disclosure can be realized in combination with any of the first to third aspects. In the illumination device (A1) according to the fourth aspect, the light distribution characteristics of the first lens block (31) preferably have a first light distribution characteristic and a second light distribution characteristic. The first light distribution characteristic is preferably biased toward the second lens block (32). The second light distribution characteristic is preferably biased toward the second lens block (32).

[0061] The illumination device (A1) according to the fourth embodiment can further expand the light irradiation range and further improve the uniformity of light on the irradiated surface.

[0062] A lighting device (A1) according to a fifth aspect of this disclosure can be realized in combination with any of the first to fourth aspects. In the lighting device (A1) according to the fifth aspect, the first light source preferably has a substrate (20) and a plurality of first light-emitting elements (first LED 210) mounted on the substrate (20). The second light source preferably has a plurality of second light-emitting elements (second LED 220) mounted on the substrate (20).

[0063] In the fifth embodiment of the lighting device (A1), since multiple first light-emitting elements and multiple second light-emitting elements are mounted on a single substrate (20), it is possible to reduce manufacturing costs and miniaturize the device by reducing the number of components.

[0064] A lighting device (A1) according to the sixth aspect of this disclosure can be realized in combination with any of the first to fifth aspects. In the lighting device (A1) according to the sixth aspect, it is preferable that the first lens block (31) and the second lens block (32) are integrally formed from a light-transmitting material.

[0065] In the sixth embodiment of the lighting device (A1), the first lens block (31) and the second lens block (32) are integrally formed, thus reducing the number of parts, thereby lowering manufacturing costs and simplifying assembly work.

[0066] The lighting device (A1) according to the seventh aspect of this disclosure can be realized in combination with any of the first to sixth aspects. In the lighting device (A1) according to the seventh aspect, the diffusion member (4) is preferably formed in the shape of a plate from a light-transmitting material.

[0067] The lighting device (A1) according to the seventh embodiment is easy to manufacture and improves assembly efficiency because the diffusion member (4) is formed in a plate shape.

[0068] An illumination device (A1) according to the eighth aspect of this disclosure can be realized in combination with any of the first to seventh aspects. Preferably, the illumination device (A1) according to the eighth aspect further comprises a body (1) that holds a first light source, a second light source, a first lens block (31), a second lens block (32), and a diffusion member (4), and a support part (housing 7, arm 70) that rotatably supports the body (1).

[0069] The lighting device (A1) according to the eighth embodiment allows the direction of light irradiation to be adjusted by rotating the main body (1) relative to the support part. [Explanation of Symbols]

[0070] A1 Lighting device B1 Light Source Unit C1 Control Unit 1 Main unit 4 Diffusion member 7 Housing (support part) 20 circuit boards 21. First LED array (first light source) 22. Second LED array (second light source) 31. First lens block 32 Second lens block 70 Arm (support part) 210 First LED (First light-emitting element) 220 Second LED (Second Light-Emitting Device) 312 Ejection surface 322 Ejection surface

Claims

1. A first light source having a linear light-emitting region, A second light source having a linear light-emitting region and adjacent to the first light source, A first lens block that controls the light distribution of the light emitted from the first light source, A second lens block that controls the light distribution of the light emitted from the second light source, A diffusion member facing the emission surface of the first lens block and the emission surface of the second lens block, Equipped with, The light distribution characteristics of the first lens block and the light distribution characteristics of the second lens block are different. The light distribution characteristics of the first lens block have a first light distribution characteristic and a second light distribution characteristic, wherein the first light distribution characteristic is biased toward the direction approaching the second lens block, and the second light distribution characteristic is biased toward the direction away from the second lens block. The first light source comprises a substrate and a plurality of first light-emitting elements mounted on the substrate, The second light source has a plurality of second light-emitting elements mounted on the substrate, The first lens block and the second lens block are integrally formed from a translucent material together with a flat base. The first lens block and the second lens block are provided on the rear surface of the base. On the rear surface of the base, a plurality of ribs are provided that protrude rearward from between the first lens block and the second lens block and abut against the substrate. Lighting device.

2. The light distribution characteristics of the first lens block are biased toward the direction away from the second lens block. The lighting device according to claim 1.

3. The light distribution characteristics of the second lens block are biased toward the direction away from the first lens block. The lighting device according to claim 1 or 2.

4. The diffusion member is formed in the shape of a plate from a light-transmitting material. A lighting device according to any one of claims 1 to 3.

5. A body that holds the first light source, the second light source, the first lens block, the second lens block, and the diffusion member, A support portion that rotatably supports the main body, It also has, A lighting device according to any one of claims 1 to 4.

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