JP7610341B2 - LED floodlight device - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act [Reason for Disclosure] Publication: Directed Lighting Catalog "DIRECTED LIGHTING 2023 Vol. 1" Catalog publication date: February 15, 2023 Disclosed by: ODELIC Co., Ltd. [Reason for Disclosure] Website address: ttps://www.odelic.co.jp/webcatalog/dpm/book/index.html#target/page_no=1 Website posting date: February 22, 2023 Disclosed by: ODELIC Co., Ltd. [Reason for Disclosure] Website address: ttps://www.odelic.co.jp/webcatalog/dpm/book/index.html#target/page_no=1 jp/ Website publication date: February 22, 2023 Publisher: ODELIC Co., Ltd. Open the ODELIC Co., Ltd. website, click on "Product Information Search," enter the following product numbers in "Select from product number free word," and click "Search." The product numbers displayed on the screen are "OE033017RG," "OE033018RG," "OE033019RG," and "OE033020RG."

The present invention relates to a floodlight device that uses LEDs.

Light-projecting devices are widely used to illuminate indoor walls and the like, and one such light-projecting device that uses LEDs (Light Emitting Diodes) has been proposed (see, for example, Patent Document 1). In this light-projecting device, a light-projecting section is provided inside a casing, and an imaging element is provided at 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.

The first LED chip includes 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 includes an amber LED that emits amber light. Red light, green light, blue light, and white light are emitted from the first LED chip (red LED, green LED, blue LED, and white LED), and amber light is emitted from the second LED chip (amber LED). The floodlight device can produce various colors of light by combining these five colors, thereby achieving a lighting effect using five colors (red, green, blue, white, and amber).

JP 2012-59514 A

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. This 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. Therefore, further improvements in the arrangement of LEDs were desired.

The objective of the present invention is to provide an LED floodlight device that can combine five different colors to produce a desired light color that blends in with the surroundings.

The LED floodlight device of the present invention 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, 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,
The central LED located in the center of the multiple LEDs arranged in 7 rows x 9 rows is the green LED, and if 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, the 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 emission color of the specific LED .

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

In addition, in such a floodlight device, it is preferable to arrange multiple LEDs so that the emitted light colors are symmetrical in the seventh row direction, the ninth row direction, and both diagonal directions around the central LED located in the center. By arranging them in this way, it is possible to maintain a balance in the colored light and reduce color unevenness.

According to the LED floodlight device of the first aspect of the present invention, the LEDs include a red LED, a green LED, a blue LED, a warm white LED, and a white LED, and 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 light that harmonizes with the surroundings. In addition, 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, so that color unevenness can be reduced. Furthermore, if a green LED is arranged as the center LED of the LEDs arranged in 7 rows x 9 rows, and an LED mounted at an arbitrary position in the 7 row direction and the 9 row direction is set as a specific LED arranged at a specific position, the color of the light emitted by the four adjacent LEDs in the 7 row direction and the 9 row direction is different from the color of the specific LED based on this specific LED, so that LEDs of the same color are not arranged consecutively in the 7 row direction and the 9 row direction, and the specific color can be suppressed from being emphasized.

1 is a perspective view showing a simplified embodiment of an LED floodlight device according to the present invention; 2 is a plan view showing a simplified diagram of an LED board in the LED floodlight device of FIG. 1 . FIG. 2 is a circuit diagram showing a control system of the LED floodlight device of FIG. 1 in a simplified manner. FIG. 2 is a block diagram showing the LED floodlight device of FIG. 1 in a simplified manner. FIG. 1 is a plan view showing a first modified example of an LED substrate; FIG. 11 is a plan view illustrating a second modified embodiment of the LED substrate. FIG. 13 is a plan view showing a simplified third variation of the LED pile plate. FIG. 13 is a plan view illustrating a fourth modified embodiment of the LED substrate.

Below, an embodiment of an LED floodlight according to the present invention will be described with reference to the attached drawings. In Figs. 1 and 2, an LED floodlight 2 has a floodlight housing 4, which has a rectangular opening 6 on its front surface and a transparent cover 8 that covers 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 2, can be adjusted.

The LED board 12 shown in FIG. 2 is built into the floodlight housing 4, and multiple LEDs are mounted on the surface of this LED board 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 configuration, the multiple 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).

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, incandescent LEDs 14L that emit a warm orange color, and white LEDs 14W that emit a natural color close to the brightness of the sun. By configuring it in this way, it is possible to obtain light close to natural light by combining the light from the five types of LEDs 14.

In this embodiment, the 63 LEDs 14 mounted on the LED board 12 are divided into a first group in which a large number of LEDs 14 are mounted on the LED board 12, and a second group in which a small number of LEDs are mounted on the LED board 12. The red LEDs 14R and blue LEDs 14B belong to the first group, and the green LEDs 14G, warm white LEDs 14L, and white LEDs 14W belong to the second group.

The first group of red LEDs 14R and blue LEDs 14B are mounted on the LED board 12 in numbers of 15 to 17, and the second group of green LEDs 14G, warm white LEDs 14L, and white LEDs 14W are mounted on the LED board 12 in numbers of 9 to 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.

The 63 LEDs 14 are preferably arranged, for example, as shown in FIG. 2. To explain further, in the 7 rows x 9 rows arrangement, it is preferable 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).

Bulb-color LEDs 14L are arranged on both sides of this central LED (green LED 14G) in the 7th row direction (m row direction) (M direction in Fig. 2), white LEDs 14W are arranged on both sides of this central LED in the 9th row direction (n row direction) (N direction in Fig. 2), and red LEDs 14R are arranged on both diagonal sides of this central LED. By arranging the first outer LED 14 in this way, it is possible to reduce color unevenness in the central region centered on the central green LED 14G, and to obtain a color development state that is close to natural color in this central region.

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

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 that is arranged outside the warm white LED 14L on both sides in the 7-row direction (m-row direction) of the central LED, and the red LED 14R is arranged outside the blue LED 14B that is arranged outside the white LED 14W on both sides in the 9-row direction (n-row direction) of the central LED, and further, the red LED 14R is arranged outside the blue LED 14B that is 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 that is 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 area centered on the central green LED 14G, and to obtain a color development state close to natural color in this wider central area.

The multiple LEDs 14 are arranged symmetrically with respect to the central LED (green LED 14G). That is, the warm white LED 14L, green LED 14G, and red LED 14R are arranged in 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-row direction (m-row direction), and are arranged symmetrically with respect to the central LED. Also, the white LED 14W, blue LED 14B, red LED 14R, and green LED 14G are arranged in 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-row direction (n-row direction), and are arranged symmetrically with respect to the central LED.

Furthermore, the 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 the 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.

As is clear from FIG. 2, if one LED 14 mounted at any position on the LED board 12 is considered to be a specific LED arranged at a specific position, the emission colors of the four adjacent LEDs 14 adjacent to this specific LED 14 (the LED located at the center) in the seventh row direction (m row direction) and ninth row direction (n row direction) are configured to be different from the emission color of this specific LED 14. By adopting such a different color arrangement structure, it is possible to prevent some emission colors from being emphasized.

For example, looking at the green LED 14G located at the center position as the specific position (which becomes the specific LED when the center position is the specific position), which is located at the base, 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), 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.

For example, if the LED to the right of the central LED in FIG. 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 way, red LEDs 14R are arranged on both sides of the 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 red LEDs 14R, green LEDs 14G and blue LEDs 14B, are arranged around the specific LED 14.

This LED floodlight device 2 constitutes a part of the 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 FIG. 3 and FIG. 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. In addition, 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.

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, and 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 converted into a drive current with a large (or small) current value by the constant current circuit 34.

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. In addition, the fourth circuit 38d of the constant current circuit 34 is electrically connected to the warm white LED 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 LED 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.

In this floodlight 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 constant current drive signal, 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 in response to 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 floodlight housing 4.

The arrangement of the LEDs on the LED board may be configured as shown in FIG. 5. In the first modified LED board shown in FIG. 5, as can be easily understood by comparing FIG. 2 with FIG. 5, white LEDs are arranged in the locations of the warm white LEDs on the LED board in FIG. 2, and warm white LEDs are arranged in the locations of the white LEDs.

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

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 the white LEDs 14W arranged on both sides of the central LED in the 7-row direction (m-row direction), blue LEDs 14B are arranged outside the warm white LEDs 14L arranged on both sides of the central LED in the 9-row direction (n-row direction), and further blue LEDs 14B are arranged outside the red LEDs 14R arranged diagonally on one side of the central LED, and white LEDs 14W are arranged outside the red LEDs 14R arranged diagonally on the other side.

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 of the central LED in the 7-row direction (m-row direction), a red LED 14R is arranged outside the blue LED 14B arranged outside the light bulb color LED 14L on both sides of the central LED in the 9-row direction (n-row direction), a red LED 14R is arranged outside the blue LED 14B arranged outside the red LED 14R on one diagonal direction from 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.

The arrangement of the multiple LEDs 14 in the first modified embodiment also has the above-mentioned symmetrical arrangement and different color arrangement. When the symmetrical arrangement of the multiple LEDs 14 is viewed with the central green LED 14G as a reference, the white LEDs 14W, green LEDs 14G, and red LEDs 14R are arranged in this order 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-row direction (m-row direction) based on the green LED 14G, and the warm white LEDs 14L, blue LEDs 14B, red LEDs 14R, and green ...R are arranged in this order 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-row direction (n-row direction). 4G are arranged, and then red LED 14R, blue LED 14B, and red LED 14R are arranged in order 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, white LED 14W, and red LED 14R are arranged in order toward the outside on one 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 the 7-row direction (m-row direction), 9-row direction (n-row direction), and both diagonal directions with the central LED as the reference.

In addition, when looking at the different color arrangement structure of the multiple LEDs 14, for example, with the central green LED 14G as the 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 with a different light emission color from the green LED 14G as the specific LED 14, in this case white LEDs 14W and warm white LEDs 14L, are arranged.

By arranging multiple LEDs 14 as shown in FIG. 5, i.e., by swapping the locations of the warm white LEDs and the white LEDs on the LED board in FIG. 2 (in other words, by arranging the white LEDs in the locations of the warm white LEDs on the LED board in FIG. 2, and arranging the warm white LEDs in the locations of the white LEDs), it is possible to obtain the same effects as the embodiment shown in FIGS. 1 to 4.

The arrangement of the LEDs on the LED board may be configured as shown in FIG. 6. In the LED board of the second modified form shown in FIG. 6, as can be easily understood by comparing FIG. 2 with FIG. 6, blue LEDs are arranged in the positions of the red LEDs on the LED board in FIG. 2, and red LEDs are arranged in the positions of the blue LEDs.

To specifically explain the LED board 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 7th row direction (m row direction), white LEDs 14W are arranged on both sides of the central LED in the 9th row direction (n row direction), and blue LEDs 14B are arranged on both diagonal directions of the central LED.

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 the warm white LEDs 14L arranged on both sides of the central LED in the 7-row direction (m-row direction), red LEDs 14R are arranged outside the white LEDs 14W arranged on both sides of the central LED in the 9-row direction (n-row direction), and a red LED is arranged outside the blue LED 14B arranged diagonally on one side of the central LED, and warm white LEDs 14L are arranged outside the blue LED arranged diagonally on the other side.

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 of the central LED in the 7-row direction (m-row direction), and a blue LED 14B is arranged outside the red LEDs 14R arranged outside the white LEDs 14W on both sides of the central LED in the 9-row direction (n-row direction), and further, a blue LED 14B is arranged outside the red LED 14R arranged outside the blue LED 14B on one diagonal direction from 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.

The arrangement of the multiple LEDs 14 in the second modified form has the above-mentioned symmetrical arrangement structure and different color arrangement structure, as in the first modified form. When the symmetrical arrangement structure of the multiple LEDs 14 is viewed with the central green LED 14G as a reference, the warm white LED 14L, the green LED 14G, and the blue LED 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-row direction (m-row direction), and the white LED 14W, the red LED 14R, the blue LED 14B, and the green LED 14L 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-row direction (n-row direction). G are arranged, and then blue LED 14B, red LED 14R, and blue LED 14B are arranged in order 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 blue LED 14B, warm white LED 14L, and blue LED 14B are arranged in order 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 the 7-row direction (m-row direction), 9-row direction (n-row direction), and both diagonal directions with the central LED as the reference.

In addition, when looking at the different color arrangement structure of the multiple LEDs 14, for example, with the central green LED 14G as the 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 the 9th row direction (n row direction), and the emission color of the LEDs 14 around the specific LED 14 is different from the emission color of the green LED 14G as the specific LED 14.

By arranging multiple LEDs 14 as shown in FIG. 6, i.e., by changing the positions of the red LEDs and blue LEDs on the LED board in FIG. 2 (in other words, by arranging blue LEDs in the positions of the red LEDs on the LED board in FIG. 2, and arranging red LEDs in the positions of the blue LEDs), it is possible to obtain the same effects as the embodiment shown in FIGS. 1 to 4.

The arrangement of the LEDs on the LED board may be configured as shown in FIG. 7. In the LED board of the third modified form 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 of FIG. 2, and warm white LEDs are arranged in the two locations of the white LEDs, and in this way the arrangement positions of some of the warm white LEDs and some of the white LEDs can be interchanged.

The third modified LED board 12C will be described in detail with reference to FIG. 7. Note that in FIG. 7 and FIG. 8, in order to identify 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.

In this third modified embodiment, white LEDs 14W are mounted at the locations "(1) x (g)" and "(7) x (c)" on the LED board 12C, and warm white LEDs 14L are mounted at the locations "(2) x (h)" and "(6) x (b)". 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 locations "(1) x (g)" and "(7) x (c)" on the LED board, and white LEDs 14W are arranged at the locations "(2) x (h)" and "(6) x (b)". The same effects as described above can be obtained by adopting such an LED board 12C.

The arrangement of the LEDs on the LED board may be configured as shown in FIG. 8. In the LED board of the third modified form 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 of FIG. 2, and warm white LEDs are arranged in the two locations of the green LEDs. In this way, the arrangement positions of some of the warm white LEDs and some of the green LEDs can be interchanged.

Referring to FIG. 8, in this 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)". 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)". The same effects as described above can be obtained by adopting such an LED board 12D.

The above describes one embodiment of an LED floodlight device according to the present invention, but the present invention is not limited to this embodiment, and various changes and modifications are possible without departing from the scope of the present invention.

For example, in the above embodiment, the LED floodlight device is described as having multiple LEDs 14 arranged in 7 rows x 9 rows (m rows x n rows), but the present invention is not limited to such a configuration and can be applied to an LED board having multiple LEDs 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.

For example, in the LED floodlight device described above, the LED board on which the LEDs are arranged in seven rows in the up-down direction (vertical direction) and nine rows in the left-right direction (horizontal direction) is long horizontally and built into the floodlight housing, but this LED board may also be long vertically and built into the floodlight housing, in which case there will be nine rows in the m-row direction and seven rows in the n-row direction, and the same effect can be achieved even if the LED boards are arranged in this way.

For example, in the LED floodlight device described above, 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, blue LED, warm white LED, and white LED. 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, n row direction, and both diagonal directions with the central LED as the center. Even in this configuration, it is preferable to configure the four adjacent LEDs in the m row direction and n row direction to emit light colors different from the emitted light color of the specific LED placed at a specific position in the m row direction and n row direction.

2 LED floodlight device 4 Throwing housing 12, 12A, 12B, 12C, 12D LED board 14 (14R, 14B, 14G, 14L, 14L) LED
22 Light projection system 24 Lighting controller 26 Control line 32 Control signal processing means 34 Constant current circuit

Claims (3)

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 . 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. The LED floodlight device according to claim 1, characterized in that the LEDs are arranged so that the light emission colors are symmetrical in the seventh row direction, the ninth row direction, and both diagonal directions with the central LED as the center.

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