LED floodlight

Abstract

To provide an LED floodlight device which can obtain desired coloring which is harmonized with a circumference by combining five kinds of luminescent colors.SOLUTION: An LED floodlight device comprises a floodlight housing incorporated with an LED baseboard 12 on which a plurality of LEDs 14 are mounted. The plurality of LEDs 14 are constituted of five kinds of LEDs of red color LEDs 14R, green color LEDs 14G, blue color LEDs 14B, bulb color LEDs 14L and white color LEDs 14W, and arranged in seven rows in a vertical direction (M direction) or a horizontal direction (N direction) of the floodlight housing, and also arranged in nine rows in the horizontal direction or the vertical direction. The red color LEDs 14R and the blue color LEDs 14B in a first group are mounted on the LED baseboard 12 at 15 to 17 pieces, and the green color LEDs 14G, the bulb color LEDs 14L and the white color LEDs 14W in a second group are mounted on the LED baseboard 12 at 9 to 12 pieces.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a floodlight device using an LED. [Background technology]

[0002] Light-projecting devices are widely used to illuminate indoor walls and the like, and a light-projecting device using LEDs (Light Emitting Diodes) has been proposed (see, for example, Patent Document 1). In this light-projecting device, a light-projecting section is provided in a casing, and an imaging element is provided in the center of this light-projecting section. A plurality of first LED chips are arranged around the imaging element at intervals in the circumferential direction, and a plurality of second LED chips are arranged at intervals radially inward of the plurality of first LED chips.

[0003] The first LED chip is equipped with a red LED that emits red light, a green LED that emits green light, a blue LED that emits blue light, and a white LED that emits white light, and the second LED chip is equipped with an amber LED that emits amber light, and the first LED chip (red LED, green LED, blue LED, and white LED) emits red light, green light, blue light, and white light, and the second LED chip (amber LED) emits amber light, so that the floodlight device can produce light of various colors by combining these five colors, thereby achieving a lighting effect using five colors (red, green, blue, white, and amber). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-59514 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in this floodlight device, multiple first LED chips (red LEDs, green LEDs, blue LEDs, and white LEDs) are arranged radially outward, and second LED chips (amber LEDs) are arranged radially inward of these first LED chips, which makes it easy for color unevenness to occur in part of the light-projecting area of ​​the light-projecting part of the casing, and it is difficult to combine these five light colors to obtain a desired light color that harmonizes with the surroundings in a room, for example.For this reason, further improvements in the arrangement of LEDs were desired.

[0006] An object of the present invention is to provide an LED floodlight device that can combine five emitted colors to obtain a desired emitted color that harmonizes with the surroundings. [Means for solving the problem]

[0007] The present invention LEDs The floodlight device is an LED floodlight device including an LED board on which a plurality of LEDs are mounted, and a floodlight housing that incorporates the LED board, The plurality of LEDs are composed of five types of LEDs, including red LEDs that emit red light, green LEDs that emit green light, blue LEDs that emit blue light, warm white LEDs that emit orange light, and white LEDs that emit natural light close to the brightness of the sun, and are arranged in seven rows in the vertical or horizontal direction of the floodlight housing and nine rows in the horizontal or vertical direction; The five types of LEDs are divided into a first group having a large number of LEDs mounted on the LED board, a second group having a small number of LEDs mounted on the LED board, and a third group having a large number of LEDs mounted on the LED board. Group 2 The red LEDs and the blue LEDs belong to the first group, and 15 to 17 LEDs are mounted on the LED board. The green LEDs, the warm white LEDs, and the white LEDs belong to the second group, and 9 to 12 LEDs are mounted on the LED board. And, The central LED located at the center of the plurality of LEDs arranged in 7 rows x 9 rows is the green LED, and an LED mounted at any position in the 7 row direction and the 9 row direction is a specific LED located at a specific position. With respect to the specific LED, the emission color of four adjacent LEDs adjacent to the 7 row direction and the 9 row direction is different from the emission color of the specific LED. It is characterized by:

[0008] In such an LED floodlight device of the first invention, it is preferable to mount 16 red LEDs and blue LEDs on the LED board, 11 green LEDs on the LED board, and 10 warm white LEDs and white LEDs on the LED board. By configuring in this manner, it is possible to obtain a natural emitted light color by combining the light from these LEDs.

[0010] In addition, in such a floodlight device, it is preferable to arrange multiple LEDs so that the emitted light colors are symmetrical in the 7th row direction, 9th row direction, and both diagonal directions around the central LED located in the center.By arranging them in this manner, it is possible to maintain a balance in the colored light and reduce color unevenness. Effect of the Invention

[0018] According to the LED floodlight of the first invention of the present invention, the LEDs include red LEDs, green LEDs, blue LEDs, warm white LEDs, and white LEDs, so that by combining the colors emitted from these five types of LEDs, it is possible to obtain a color state close to natural colors and a desired color of emitted light that harmonizes with the surroundings. Also, since 15 to 17 red LEDs and blue LEDs are mounted on the LED board, and 9 to 12 green LEDs, warm white LEDs, and white LEDs are mounted on the LED board, color unevenness can be reduced. Furthermore, if a green LED is placed as the central LED among multiple LEDs arranged in 7 rows x 9 rows, and an LED mounted at any position in the 7-row and 9-row directions is designated as a specific LED placed at a specific position, the light emission color of the four adjacent LEDs in the 7-row and 9-row directions adjacent to this specific LED will be different from the light emission color of the specific LED, so that LEDs of the same color will not be arranged consecutively in the 7-row and 9-row directions, and the emphasis on a specific color can be suppressed. [Brief description of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a simplified embodiment of an LED floodlight device according to the present invention; [Diagram 2] 2 is a plan view showing a simplified diagram of an LED substrate in the LED floodlight device of FIG. 1; [Diagram 3] FIG. 2 is a circuit diagram showing a simplified control system of the LED floodlight device of FIG. 1. [Figure 4] FIG. 2 is a block diagram showing the LED floodlight device of FIG. 1 in a simplified manner. [Diagram 5] FIG. 1 is a plan view showing a first modified example of an LED substrate; [Figure 6]FIG. 11 is a plan view illustrating a second modified embodiment of the LED substrate. [Figure 7] FIG. 11 is a plan view showing a simplified third variation of the LED pile plate. [Figure 8] FIG. 13 is a plan view illustrating a fourth modified embodiment of the LED substrate. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] An embodiment of an LED floodlight according to the present invention will be described below with reference to the accompanying drawings. In Fig. 1 and Fig. 2, an LED floodlight 2 includes a floodlight housing 4, a rectangular opening 6 is provided on the front surface of the floodlight housing 4, and a transparent cover 8 is provided to cover the opening 6. A support member 10 is attached to the rear surface of the floodlight housing 4, and by adjusting the inclination angle of the support member 10, the inclination angle of the floodlight housing 4, in other words, the light projection direction of the LED floodlight device 2 can be adjusted.

[0023] 2 is built into the floodlight housing 4, and a plurality of LEDs are mounted on the surface of this LED substrate 12 at intervals in the M direction (the up-down direction in FIG. 2) and the N direction (the left-right direction in FIG. 2). In this embodiment, the plurality of LEDs 14 are arranged in seven rows at equal intervals in the M direction and nine rows at equal intervals in the N direction, for a total of 63 LEDs 14 mounted in 7 rows (m rows) x 9 rows (n rows).

[0024] In this LED floodlight device 2, the multiple LEDs 14 are composed of five types of LEDs: red LEDs 14R that emit red light, green LEDs 14G that emit green light, blue LEDs 14B that emit blue light, warm white LEDs 14L that emit light in an orange color, and white LEDs 14W that emit light in a natural color close to the brightness of the sun. By configuring it in this way, it is possible to combine the light from the five types of LEDs 14 to obtain light that is close to natural light.

[0025] In this embodiment, the 63 LEDs 14 mounted on the LED board 12 are divided into a first group having a large number of LEDs mounted on the LED board 12 and a second group having a small number of LEDs mounted on the LED board 12, with the red LEDs 14R and blue LEDs 14B belonging to the first group, and the green LEDs 14G, warm white LEDs 14L, and white LEDs 14W belonging to the second group.

[0026] Fifteen to seventeen of the red LEDs 14R and blue LEDs 14B of the first group are mounted on the LED board 12, and nine to twelve of the green LEDs 14G, warm white LEDs 14L and white LEDs 14W of the second group are mounted on the LED board 12. As shown in Fig. 2, it is preferable that the number of LEDs 14 mounted on the LED board 12 is 16 for the red LEDs 14R and blue LEDs 14B, 11 for the green LEDs 14G, and 10 for the warm white LEDs 14L and white LEDs 14W, and thus a natural light emission color can be obtained by combining the light emission colors from these LEDs 14.

[0027] The 63 LEDs 14 are desirably arranged, for example, as shown in Fig. 2. More specifically, in the 7 rows x 9 rows arrangement, it is desirable that the central LED located in the middle is a green LED 14G, and the remaining LEDs 14 are arranged, for example, as follows, so as to spread out around this green LED 14G (central LED).

[0028] Warm white LEDs 14L are arranged on both sides of this central LED (green LED 14G) in the 7-column direction (m-column direction) (M direction in Figure 2), white LEDs 14W are arranged on both sides of this central LED in the 9-column direction (n-column direction) (N direction in Figure 2), and red LEDs 14R are arranged on both diagonal sides of this central LED. By arranging the first outer LED 14 around the central LED in this manner, it is possible to reduce color unevenness in the central region around the central green LED 14G and to obtain a color development state that is close to natural colors in this central region.

[0029] In relation to such an arrangement of LEDs 14, it is preferable to configure the arrangement of the second outer LED 14 centered on the central LED as follows: green LED 14G is arranged outside warm white LED 14L arranged on both sides of the central LED in the 7-column direction (m-column direction), blue LED 14B is arranged outside white LED 14W arranged on both sides of the central LED in the 9-column direction (n-column direction), and further blue LED 14B is arranged outside red LED 14R arranged diagonally on one side of the central LED, and warm white LED 14L is arranged outside red LED 14R arranged diagonally on the other side. By arranging the second outer LED 14 in this way in relation to the arrangement of the first LED 14 centered on the central LED, it is possible to reduce color unevenness in a wide central region centered on the central green LED 14G, and to obtain a color development state close to natural color in this wide central region.

[0030] Furthermore, in relation to the arrangement of the first and second such LEDs 14, it is preferable to configure the arrangement of the third outer LED 14 centered on the central LED as follows: The red LED 14R is arranged outside the green LED 14G arranged outside the warm white LED 14L on both sides in the 7-column direction (m-column direction) of the central LED, the red LED 14R is arranged outside the blue LED 14B arranged outside the white LED 14W on both sides in the 9-column direction (n-column direction) of the central LED, and further the red LED 14R is arranged outside the blue LED 14B arranged outside the red LED 14R on one diagonal direction of the central LED, and the red LED 14R is arranged outside the warm white LED 14L arranged outside the red LED 14W on the other diagonal direction. By arranging the third outer LED 14 in this way in relation to the arrangement of the first and second LEDs 14 centered on the central LED, it is possible to reduce color unevenness in a wider central region centered on the central green LED 14G, and to obtain a color development state close to natural color in this wider central region.

[0031] The LEDs 14 are arranged symmetrically with respect to the central LED (green LED 14G). That is, the warm white LED 14L, the green LED 14G, and the red LED 14R are arranged in this order from the central green LED 14G toward the outside on one side (e.g., the upper side in FIG. 2) and the other side (e.g., the lower side in FIG. 2) of the seven-column direction (m-column direction), and are arranged symmetrically with respect to the central LED. Also, the white LED 14W, the blue LED 14B, the red LED 14R, and the green LED 14G are arranged in this order from the central green LED 14G toward the outside on one side (e.g., the left side in FIG. 2) and the other side (e.g., the right side in FIG. 2) of the nine-column direction (n-column direction), and are arranged symmetrically with respect to the central LED.

[0032] Furthermore, red LED 14R, blue LED 14B, and red LED 14R are arranged in order from the central green LED 14G toward the outside on one diagonal side (e.g., the upper left side in FIG. 2) and the other side (e.g., the lower right side in FIG. 2), and red LED 14R, warm white LED 14L, and red LED 14R are arranged in order from the central green LED 14G toward the outside on the other diagonal side (e.g., the upper right side in FIG. 2) and the other side (e.g., the lower left side in FIG. 2), and are arranged symmetrically in both diagonal directions with the central LED as the base. By adopting such a symmetrical arrangement structure, the occurrence of color unevenness in the light-emitting state of the multiple LEDs 14 is suppressed.

[0033] Furthermore, as is clear from FIG. 2, if one LED 14 mounted at any position on the LED substrate 12 is considered to be a specific LED arranged at a specific position, the emission colors of four adjacent LEDs 14 adjacent to this specific LED 14 (the LED located at the center) in the 7-row direction (m-row direction) and 9-row direction (n-row direction) are configured to be different from the emission color of this specific LED 14, and by adopting such a different color arrangement structure, it is possible to prevent some emission colors from being emphasized.

[0034] For example, if one takes a green LED 14G (which becomes the specific LED when the central position is taken as the specific position) located at the center as a specific position as a reference point, warm white LEDs 14L are arranged on either side of this green LED 14G in the 7th row direction (m row direction), and white LEDs 14W are arranged on either side of it in the 9th row direction (n row direction), and LEDs 14 of a different color from the green LED 14G, in this case the warm white LEDs 14L and white LEDs 14W, are arranged around the specific LED 14.

[0035] Also, for example, if the LED to the right of this central LED in Figure 2 is taken as the specific LED 14, the white LED 14W to the right of the green LED 14G will be viewed as the reference, and when viewed in this manner, red LEDs 14R are arranged on both sides of this white LED 14W in the 7th row direction (m row direction), and green LEDs 14G and blue LEDs 14B are arranged on both sides in the 9th row direction (n row direction), and LEDs 14 of a different color from the white LED 14W, in this case the red LED 14R, green LED 14G and blue LED 14B, are arranged around the specific LED 14.

[0036] This LED floodlight device 2 constitutes a part of a floodlight system 22 shown in Fig. 3, and is controlled by a lighting controller 24 that controls the lighting of the entire system. With reference to Figs. 3 and 4, this floodlight system 22 includes a plurality of LED floodlight devices 2, which are connected in series via a control line 26, and the lighting of these LED floodlight devices 2 is controlled by a lighting control signal from the lighting controller 24. Commercial power (e.g., 100V) from a commercial power source 28 is supplied to the floodlight system 22 through a power supply line 30, and the commercial power thus supplied is supplied to the lighting controller 24 through a first branch line 30a, and is also supplied to the corresponding LED floodlight devices 2 through a plurality of second branch lines 30b.

[0037] The control system of the LED floodlight device 2 is configured as shown in Fig. 4 and includes a control signal processing means 32, a constant current circuit 34, and a switching power supply 36, and the constant current circuit 34 has first to fifth circuits 38a to 38e. The control signal processing means 32 is configured, for example, by a microprocessor, processes the lighting control signal from the lighting controller 24 as required, and sends it to the constant current circuit 34. The switching power supply 36 converts commercial power (AC power) from the commercial power supply 28 into a pulse current, and the pulse current from the switching power supply 36 is sent to the constant low current circuit 34 and converted into a constant current. The switching power supply 36 generates a pulse current with a predetermined duty ratio, and the pulse current with a large (or small) duty ratio is turned into a drive current with a large (or small) current value by the constant current circuit 34.

[0038] In this embodiment, the first circuit 38a of the constant current circuit 34 is electrically connected to the red LED 14R (only one of the 16 is shown in FIG. 4), and the 16 red LEDs 14R emit light by the drive current supplied from the first circuit 38a. The second circuit 38b of the constant current circuit 34 is electrically connected to the green LED 14G (only one of the 11 is shown in FIG. 4), and the 11 green LEDs 14G emit light by the drive current supplied from the second circuit 38b. The third circuit 38c of the constant current circuit 34 is electrically connected to the blue LED 14B (only one of the 16 is shown in FIG. 4), and the 16 blue LEDs 14B emit light by the drive current supplied from the third circuit 38c. Moreover, the fourth circuit 38d of the constant current circuit 34 is electrically connected to the warm white LEDs 14L (only one of the ten is shown in FIG. 4), and the ten warm white LEDs 14L emit light by the drive current supplied from the fourth circuit 38d. Furthermore, the fifth circuit 38e of the constant current circuit 34 is electrically connected to the white LEDs 14W (only one of the ten is shown in FIG. 4), and the ten white LEDs 14W emit light by the drive current supplied from the fifth circuit 38e.

[0039] In this light projection system 22, for example, when a red lighting control signal (and a green lighting control signal, a blue lighting control signal, a light bulb color lighting control signal, and a white lighting control signal) is supplied from the lighting controller 24, the control signal processing means 32 processes the red lighting control signal (and a green lighting control signal, a blue lighting control signal, a light bulb color lighting control signal, and a white lighting control signal) as required, and the constant current circuit 34 converts the pulse signal from the switching power supply 34 into a drive signal of a constant current, and the 16 red LEDs 14R (and 11 green LEDs 14G, 16 blue LEDs 14B, 10 light bulb color LEDs 14L, and 10 white LEDs 14W) emit light by the drive signal generated by the first circuit 38a (and the second circuit 38b, the third circuit 38c, the fourth circuit 38d, and the fifth circuit 38e), and the light thus emitted is projected to the front side from the opening 6 of the light projection housing 4.

[0040] The LEDs on the LED board may be arranged as shown in Fig. 5. In the LED board of the first modified embodiment shown in Fig. 5, as can be easily understood by comparing Fig. 2 with Fig. 5, white LEDs are arranged in the positions where the warm white LEDs are arranged on the LED board in Fig. 2, and warm white LEDs are arranged in the positions where the white LEDs are arranged.

[0041] To specifically explain the LED substrate 12A of the first modified form with reference to Figure 5, in this modified form as well, a green LED 14G is arranged as the central LED, white LEDs 14W are arranged on both sides of this central LED in the 7-row direction (m-row direction), warm white LEDs 14L are arranged on both sides of this central LED in the 9-row direction (n-row direction), and red LEDs 14R are arranged on both diagonal sides of this central LED.

[0042] In relation to the arrangement of the first outer LED 14, the arrangement of the second outer LED 14 is configured as follows: green LEDs 14G are arranged outside white LEDs 14W arranged on both sides of the central LED in the 7-column direction (m-column direction), blue LEDs 14B are arranged outside warm white LEDs 14L arranged on both sides of the central LED in the 9-column direction (n-column direction), and further blue LEDs 14B are arranged outside red LEDs 14R arranged diagonally on one side of the central LED, and white LEDs 14W are arranged outside red LEDs 14R arranged diagonally on the other side.

[0043] Furthermore, in relation to the arrangement of the first and second LEDs 14, the arrangement of the third outer LED 14 centered on the central LED is configured as follows: A red LED 14R is arranged outside the green LED 14G arranged outside the white LED 14W on both sides in the 7-column direction (m-column direction) of the central LED, a red LED 14R is arranged outside the blue LED 14B arranged outside the warm white LED 14L on both sides in the 9-column direction (n-column direction) of the central LED, a red LED 14R is arranged outside the blue LED 14B arranged outside the red LED 14R on one diagonal direction of the central LED, and a red LED 14R is arranged outside the white LED 14W arranged outside the red LED 14W on the other diagonal direction.

[0044] The arrangement of the plurality of LEDs 14 in the first modified embodiment also has the above-mentioned symmetrical arrangement and different color arrangement. When the symmetrical arrangement of the plurality of LEDs 14 is viewed with the central green LED 14G as a reference, the white LEDs 14W, the green LEDs 14G, and the red LEDs 14R are arranged in order from the green LED 14G toward the outside on one side (e.g., the upper side in FIG. 2) and the other side (e.g., the lower side in FIG. 2) of the 7-column direction (m-column direction) toward the outside on one side (e.g., the left side in FIG. 2) and the other side (e.g., the right side in FIG. 2) of the 9-column direction (n-column direction), the warm white LEDs 14L, the blue LEDs 14B, the red LEDs 14R, and the green LEDs 14L, 2) and the other side (for example, the lower right side in FIG. 2), red LED 14R, blue LED 14B, and red LED 14R are arranged in that order toward the outside, and red LED 14R, white LED 14W, and red LED 14R are arranged in that order toward the outside on one side (for example, the upper left side in FIG. 2) and the other side (for example, the lower left side in FIG. 2) of the other diagonal direction, and are arranged symmetrically in the 7-row direction (m-row direction), 9-row direction (n-row direction), and both diagonal directions with the central LED as the base.

[0045] In addition, when looking at the different color arrangement structure of the multiple LEDs 14, for example, with the central green LED 14G as a reference, white LEDs 14W are arranged on both sides of this green LED 14G in the 7th row direction (m row direction), and warm white LEDs 14L are arranged on both sides of it in the 9th row direction (n row direction). Around the specific LED 14, LEDs 14 of a different light color from the green LED 14G as the specific LED 14, in this case the white LEDs 14W and warm white LEDs 14L, are arranged.

[0046] The same effects as those of the embodiment shown in Figures 1 to 4 can also be obtained by arranging multiple LEDs 14 as shown in Figure 5, i.e., by swapping the locations of the warm white LEDs and the white LEDs on the LED board in Figure 2 (in other words, by arranging white LEDs in the locations of the warm white LEDs on the LED board in Figure 2, and arranging warm white LEDs in the locations of the white LEDs).

[0047] The LEDs on the LED board may be arranged as shown in Fig. 6. In the LED board of the second modified embodiment shown in Fig. 6, as can be easily understood by comparing Fig. 2 with Fig. 6, blue LEDs are arranged in the positions where the red LEDs are arranged on the LED board in Fig. 2, and red LEDs are arranged in the positions where the blue LEDs are arranged.

[0048] To specifically explain the LED substrate 12B of the second modified form with reference to Figure 6, in this modified form as well, a green LED 14G is arranged as the central LED, warm white LEDs 14L are arranged on both sides of the central LED in the 7-column direction (m-column direction), white LEDs 14W are arranged on both sides of the central LED in the 9-column direction (n-column direction), and blue LEDs 14B are arranged on both diagonal sides of the central LED.

[0049] In relation to the arrangement of the first outer LED 14, the arrangement of the second outer LED 14 is configured as follows: green LEDs 14G are arranged outside warm white LEDs 14L arranged on both sides of the central LED in the 7-column direction (m-column direction), red LEDs 14R are arranged outside white LEDs 14W arranged on both sides of the central LED in the 9-column direction (n-column direction), and further a red LED is arranged outside blue LEDs 14B arranged diagonally on one side of the central LED, and warm white LEDs 14L are arranged outside blue LEDs arranged diagonally on the other side.

[0050] Furthermore, in relation to the arrangement of the first and second LEDs 14, the arrangement of the third outer LED 14 centered on the central LED is configured as follows: A blue LED is arranged outside the green LEDs 14G arranged outside the warm white LEDs 14L on both sides in the 7-column direction (m-column direction) of the central LED, and a blue LED 14B is arranged outside the red LEDs 14R arranged outside the white LEDs 14W on both sides in the 9-column direction (n-column direction) of the central LED, and further, a blue LED 14B is arranged outside the red LED 14R arranged outside the blue LED 14B on one diagonal direction of the central LED, and a blue LED 14B is arranged outside the warm white LED 14L arranged outside the blue LED 14B on the other diagonal direction.

[0051] Similarly to the first modified embodiment, the arrangement of the LEDs 14 in the second modified embodiment has the above-mentioned symmetrical arrangement and different color arrangement. When the symmetrical arrangement of the LEDs 14 is viewed with the green LED 14G in the center as a reference, the warm white LEDs 14L, the green LEDs 14G, and the blue LEDs 14B are arranged in this order from the green LED 14G toward the outside on one side (e.g., the upper side in FIG. 2) and the other side (e.g., the lower side in FIG. 2) of the 7-column direction (m-column direction) toward the outside on one side (e.g., the left side in FIG. 2) and the other side (e.g., the right side in FIG. 2) of the 9-column direction (n-column direction), the white LEDs 14W, the red LEDs 14R, the blue LEDs 14B, and the green LEDs 14C are arranged in this order from the green LED 14G toward the outside on one side (e.g., the left side in FIG. 2) and the other side (e.g., the right side in FIG. 2) of the 9-column direction (n-column direction). 2) and the other side (for example, the lower right side in FIG. 2), blue LED 14B, red LED 14R, and blue LED 14B are arranged in that order toward the outside, and blue LED 14B, warm white LED 14L, and blue LED 14B are arranged in that order toward the outside on one side (for example, the upper left side in FIG. 2) and the other side (for example, the lower left side in FIG. 2) of the other diagonal direction, and are arranged symmetrically in the 7-row direction (m-row direction), 9-row direction (n-row direction), and both diagonal directions with the central LED as the base.

[0052] In addition, when looking at the different color arrangement structure of the multiple LEDs 14, for example, with the central green LED 14G as a reference, warm white LEDs 14L are arranged on both sides of this green LED 14G in the 7th row direction (m row direction), and white LEDs 14W are arranged on both sides of it in the 9th row direction (n row direction), so that the light emission color of the LEDs 14 around a particular LED 14 is different from the light emission color of the green LED 14G as the particular LED 14.

[0053] 1 to 4 can be obtained by arranging multiple LEDs 14 as shown in FIG. 6, i.e., by swapping the locations of the red LEDs and the blue LEDs on the LED board in FIG. 2 (in other words, by arranging a blue LED in the location of the red LED on the LED board in FIG. 2, and arranging a red LED in the location of the blue LED).

[0054] The LEDs on the LED board may be arranged as shown in Fig. 7. In the LED board of the third modified embodiment shown in Fig. 7, as can be easily understood by comparing Fig. 2 with Fig. 7, white LEDs are arranged in the two locations of the warm white LEDs on the LED board in Fig. 2, and warm white LEDs are arranged in the two locations of the white LEDs, and thus the arrangement positions of some of the warm white LEDs and some of the white LEDs can be interchanged.

[0055] The LED board 12C of the third modified embodiment will be specifically described with reference to Fig. 7. In Fig. 7 and Fig. 8, in order to specify the position of each LED, the seven-column direction (m-column direction) will be numbered (1) to (7) from bottom to top in Fig. 7 and Fig. 8, and the nine-column direction (n-column direction) will be numbered (a) to (i) from left to right in Fig. 7 and Fig. 8.

[0056] In this third modified embodiment, white LEDs 14W are mounted at the position "(1)×(g)" and the position "(7)×(c)" on the LED board 12C, and warm white LEDs 14L are mounted at the position "(2)×(h)" and the position "(6)×(b)" on the LED board. The remaining LEDs 14 are arranged as shown in FIG. 2, similar to the embodiment shown in FIG. 1 to FIG. 4. In FIG. 2, warm white LEDs 14L are arranged at the position "(1)×(g)" and the position "(7)×(c)" on the LED board, and white LEDs 14W are arranged at the position "(2)×(h)" and the position "(6)×(b)". The same effects as described above can be obtained by adopting such an LED board 12C.

[0057] The LEDs on the LED board may be arranged as shown in Fig. 8. In the LED board of the third modified embodiment shown in Fig. 8, as can be easily understood by comparing Fig. 2 with Fig. 8, green LEDs are arranged in the two locations of the warm white LEDs on the LED board in Fig. 2, and warm white LEDs are arranged in the two locations of the green LEDs, and thus the arrangement positions of some of the warm white LEDs and some of the green LEDs can be interchanged.

[0058] 8, in the fourth modified embodiment, green LEDs 14WG are mounted at the positions "(1)×(g)" and "(7)×(c)" on the LED board 12D, and warm white LEDs 14L are mounted at the positions "(4)×(a)" and "(4)×(i)" on the LED board 12D, and the remaining LEDs 14 are arranged as shown in FIG. 2, similar to the embodiment shown in FIG. 1 to FIG. 4. In FIG. 2, warm white LEDs 14L are arranged at the positions "(1)×(g)" and "(7)×(c)" on the LED board, and green LEDs 14G are arranged at the positions "(4)×(a)" and "(4)×(i)" on the LED board. Even if such an LED board 12D is used, the same effects as those described above can be obtained.

[0059] While one embodiment of the LED floodlight device according to the present invention has been described above, the present invention is not limited to this embodiment, and various changes and modifications can be made without departing from the scope of the present invention.

[0060] For example, in the above-described embodiment, the present invention has been described as being applied to an LED floodlight device in which multiple LEDs 14 are arranged in 7 rows by 9 rows (m rows by n rows), but the present invention is not limited to such a configuration and can be similarly applied to an LED substrate in which multiple LEDs are arranged in m rows in the M direction (m is an odd number greater than or equal to 7) or in n rows in the N direction (n is an odd number greater than or equal to 7), and m and n may be different numbers or may be the same number.

[0061] Furthermore, for example, in the LED floodlight described above, the LED board having multiple LEDs arranged in seven rows in the up-down direction (vertical direction) and nine rows in the left-right direction (horizontal direction) is built into the floodlight housing in a horizontal configuration; however, this LED board may also be built into the floodlight housing in a vertical configuration, in which case the m-row direction will be nine rows and the n-row direction will be seven rows, and the same effects will be achieved even if the LED boards are arranged in this manner.

[0062] Also, for example, in the above-mentioned LED floodlight device, the central LED located at the center of the multiple LEDs arranged in m rows x n rows is a green LED, but instead of this green LED, the central LED may be any of a red LED, a blue LED, an incandescent LED, and a white LED, and even in this configuration, it is preferable to arrange the multiple LEDs (i.e., LEDs of five emitting colors) so that the emitted colors are symmetrical in the m row direction, the n row direction, and both diagonal directions with the central LED as the center. Also, even in this configuration, it is preferable to configure the four adjacent LEDs in the m row direction and the n row direction to emit light colors different from the emitted light color of the specific LED based on the specific LED arranged at a specific position in the m row direction and the n row direction. [Explanation of symbols]

[0063] 2 LED floodlights 4. Haiku Housing 12,12A,12B,12C,12D LED board 14(14R,14B,14G,14L,14L) LED 22 Floodlight system 24 Lighting Controller 26 Control Line 32 Control signal processing means 34 Constant current circuit

Claims

1. An LED floodlight device including an LED board on which a plurality of LEDs are mounted, and a floodlight housing that houses the LED board, the plurality of LEDs are composed of five types of LEDs, namely, red LEDs that emit red light, green LEDs that emit green light, blue LEDs that emit blue light, incandescent LEDs that emit a warm orange color, and white LEDs that emit a natural color close to the brightness of the sun, and are arranged in seven rows in the vertical or horizontal direction of the floodlight housing and nine rows in the horizontal or vertical direction; The five types of LEDs are divided into a first group in which a large number of LEDs are mounted on the LED board and a second group in which a small number of LEDs are mounted on the LED board, the red LEDs and the blue LEDs belong to the first group, and 15 to 17 LEDs are mounted on the LED board, and the green LEDs, the warm white LEDs, and the white LEDs belong to the second group, and 9 to 12 LEDs are mounted on the LED board, This LED floodlight device is characterized in that a central LED located in the center of the multiple LEDs arranged in 7 rows x 9 rows is the green LED, and an LED mounted at any position in the 7-row direction and the 9-row direction is defined as a specific LED located at a specific position, and the light emission color of four adjacent LEDs adjacent to the specific LED in the 7-row direction and the 9-row direction is different from the light emission color of the specific LED based on the specific LED.

2. The LED floodlight device according to claim 1, characterized in that 16 of the red LEDs and blue LEDs are mounted on the LED board, 11 of the green LEDs are mounted on the LED board, and 10 of the warm white LEDs and white LEDs are mounted on the LED board.

3. 2. The LED floodlight device according to claim 1, wherein the plurality of LEDs are arranged so that the emitted light colors are symmetrical in the seventh row direction, the ninth row direction and both oblique directions with the central LED as a center.

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