JP2008210660A - Color-correction illuminating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color-correction illuminating device capable of brilliantly illuminating a red-color object. <P>SOLUTION: The color-correction illuminating device (1) is provided with a fluorescent lamp (20) as a white light source, and a red light-emitting diode (26) as a red light source, illuminating in mixture light of the fluorescent lamp (20) and the red light-emitting diode (26). Further, a reflecting plate (22) guiding light of the fluorescent lamp (20) toward an illumination direction has a drilled hole (27) bored, toward the rear of which (27), the red light-emitting diode (26) is arranged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a correction illumination device that corrects the color appearance of an illuminated article, and more particularly, to a color correction illumination device suitable for food illumination.

In merchandise stores and grocery stores, the vivid colors of the displayed products have a great influence on the number of products sold.

  In general, fluorescent lamps are used for illumination of products from the viewpoint of energy saving and energy saving (see Patent Document 1).

  In the showcase described in Patent Document 1, a straight tube fluorescent lamp or an LED module arranged in an array is attached as an edge illumination light source for the left and right transparent side plates of the case body, and the side plate is used as a light guide plate. In addition, it is also proposed that a blue LED and a red LED are used in combination as the LED module, and these are switched and turned on to display the refrigerated product and the warmed product separately.

  In addition, because of the light emission principle of fluorescent lamps, the amount of red light is insufficient, so neodymium lamps are often used for lighting fresh food products.

In addition, in illuminating devices other than food, there is an illuminating device for photographing that includes a fluorescent lamp as a white light source and an LED as a color light source (see Patent Document 2).
JP 2006-334275 A JP 2006-349802 A

  However, lighting by fluorescent lamps makes red foods such as tomatoes and meat look dull and lacks the effect of vividly displaying the original color of the food. Even if high-color-rendering fluorescent lamps, which are relatively close to natural light, are used, red foods cannot be vividly displayed. In addition, lighting with a neodymium lamp tends to be avoided by consumers because food appears more pink than necessary.

  The illuminating device of Patent Document 2 uses a LED to give a background color instead of a background screen at the time of taking a picture, and does not illuminate a subject with fluorescent light and LED light.

In view of the above-described background art, an object of the present invention is to provide a color correction illumination device capable of illuminating red articles, particularly red foods.
That is, the color correction illumination device of the present invention has the configurations described in [1] to [6] below.

  [1] A color correction illumination device comprising a fluorescent lamp as a white light source and a red light emitting diode as a red light source, and illuminating with a mixed light of the fluorescent lamp and the red light emitting diode.

  [2] The color correction illumination device according to [1], wherein the red light emitting diode is a light emitting diode having a peak wavelength at 620 to 650 nm.

  [3] The color correction illumination device according to item 1 or 2, wherein the luminous flux of the red light emitting diode is 6 to 65 lm (lumen) with respect to the luminous flux of 1000 lm (lumen) of the fluorescent lamp.

  [4] The color correction illumination device according to any one of items 1 to 3, wherein the fluorescent lamp is a high color rendering fluorescent lamp having an average color rendering index (Ra) of 80 or more.

  [5] The color correction illumination according to any one of [1] to [4], wherein a punched hole is formed in a reflecting plate that guides the light of the fluorescent lamp in an illumination direction, and a red light emitting diode is disposed behind the punched hole. apparatus.

  [6] The color correction illumination device according to any one of items 1 to 5, wherein the color correction illumination device is an illumination device that illuminates food.

  According to the color correction illumination device described in [1] above, since the red light of the red light-emitting diode is supplemented to the fluorescent lamp having a weak light quantity in the red region, the mixed light becomes a well-balanced white light. For this reason, when a red article is illuminated, the original red color of the article can be displayed vividly.

  According to each of the color correction illumination devices described in [2], [3], and [4], it is possible to obtain white mixed light that has a particularly high color rendering property and is well-balanced, and can show red vividly.

  According to the color correction illumination device described in [5] above, it is possible to make red appear vividly without exposing the red light emitting diode.

  According to the color correction illumination device described in [6] above, it is possible to illuminate a red food and make the original red color of the food look vivid.

  The color correction illumination device of the present invention secures brightness as illumination by using a fluorescent lamp of a white light source as a main light source, and a red light emitting diode (hereinafter abbreviated as “red LED”) as a red light source as a sub light source. ) And illuminating with the mixed light of these light sources, in particular, corrects the appearance of the color of the red article, and illuminates so that the original color of the article appears vividly.

  There are various types of fluorescent lamps with peak wavelengths of 2, 3, and 5 wavelengths, and there are various types of luminescent colors, such as a warm-colored type and a cold-colored type. Fluorescent lamps also have a low emission intensity in the red region. When a red article is illuminated with such a fluorescent lamp, the color appears to be different from that when illuminated with natural light.

  Such color shift due to the light source is defined as color rendering. Color rendering is the effect of the appearance of an object color by a certain light source compared to the appearance of the object color by a reference light source under specified conditions. It is expressed as a converted color rendering index (R1 to R8). The color rendering index is 100 when viewed with reference light, and the numerical value decreases as the color shift increases. Further, the average value of the color rendering index R1 to R8 is defined as the average color rendering index (Ra), and five realistic test colors for special color rendering evaluation (red, yellow, green, blue, Western skin color, leaf color) It is expressed numerically as a special color rendering index (R9 to R15) for color, Japanese skin color.

Table 1 shows the color rendering index (R1 to R8), average color rendering index (Ra), and special color rendering index (R9 to R15) of fluorescent lamps (FHF type, 54W, L color), and luminance as a reference value. (Cd / m ² ), chromaticity (x, y), color temperature (K), and distance (Δuv) from the black body locus. The distance (Δuv) from the black body locus becomes more green as the + value increases, and pink as the − value increases. FIG. 1A shows the spectral distribution of the fluorescent lamp.

Illumination of red products such as tomatoes and meat red foods using only such fluorescent lamps is insufficient in vividness, but red LED supplements red light to improve the balance as white light. The original red color of food looks vivid. Table 1 shows the color rendering index (R1 to R8), average color rendering index (Ra), and special color rendering evaluation when a red LED (peak wavelength: about 635 nm, 130 mA, 8 W) is added to one fluorescent lamp. Number (R9 to R15), luminance (cd / m ² ), chromaticity (x, y), color temperature (K), and distance (Δuv) from the black body locus. FIG. 2B shows the spectral distribution of the mixed light of the fluorescent lamp and the red LED.

  From Table 1, it is clear that the red special color rendering index (R9) was significantly increased from “−3” to “16” and the red color was compensated by adding the red LED. 1A and 1B also show that the intensity of the red region has increased. Compared to the intensity of the fluorescent light at the red peak wavelength (about 610 to 615 nm), the increase in intensity due to the red LED is small, but the effect on the increase in the red special color rendering index (R9) is extremely large, and the red color shift is It can be seen that there is a marked improvement.

  Moreover, even if the intensity of the red LED is too high, the balance as white light is lost. It is preferable to adjust the light of the fluorescent lamp and the light of the red LED so that the luminous flux of the fluorescent lamp is in a range of 6 to 65 lm with respect to the luminous flux of 1000 lm (lumen). Good white light. The ratio can be appropriately set according to the output of the fluorescent lamp and the red LED, the number ratio of the red LED to the fluorescent lamp, and the like. For example, when 16 red LEDs (0.5 W per LED: 8 W) are used for one 54 W fluorescent lamp in Table 1, the luminous flux of the red LED is about 34 lm with respect to 1000 lm of fluorescent lamp light. is there.

  In the present invention, the fluorescent lamp can be used regardless of the number of peak wavelengths, the color tone of warm colors, cold colors, and the like. This is because all of these fluorescent lamps have low emission intensity in the red wavelength region, and the balance of white light is improved by supplementing with a red LED. The shape of the fluorescent lamp such as a straight tube, a ring shape, or a spherical shape is not limited. However, there are various colors of articles to be illuminated, and it is preferable to use a fluorescent lamp having high color rendering properties in order to illuminate various colors vividly. This is because a more balanced white light can be obtained by using a fluorescent lamp with high color rendering properties. Specifically, it is preferable to use a high color rendering fluorescent lamp having an average color rendering index (Ra) of 80 or more.

  The red LED preferably has a peak wavelength in the range of 620 to 650 nm in order to compensate for the wavelength region where the emission intensity of the fluorescent lamp is low. It is also optional to use a plurality of types of red LEDs having different peak wavelengths. Further, since the LED has a smaller light emitting area than the fluorescent lamp, it is also preferable to arrange a plurality of LEDs for one fluorescent lamp in order to compensate for the illumination area of the fluorescent lamp uniformly. For example, for a straight tube fluorescent lamp, it is preferable to arrange a plurality of LEDs along the length direction of the fluorescent lamp. Of course, the number of fluorescent lamps is also arbitrary. What is necessary is just to determine suitably the number of red LED with respect to a fluorescent lamp so that it may become the preferable light beam ratio of the fluorescent lamp and red LED mentioned above according to the spreading angle and emitted light intensity of LED.

  The present invention supplements only red light to improve the balance as white light, and does not impair the appearance of articles of other colors by supplementing red light. For example, green vegetables look vivid by reflecting the light in the green area of fluorescent lamps, but they absorb red light and are not affected or hardly affected by the red LED. Never see. In addition, since fluorescent lamps have sufficient light emission intensity in the green region, green vegetables can be seen vividly, and when green LED is added to increase green light, the balance as white light is broken and bright. I can't show you. The present invention can achieve a remarkable effect by combining a red LED with a fluorescent lamp having a weak red region.

  Hereinafter, an embodiment of a color correction illumination device that illuminates with mixed light using a fluorescent lamp and a red LED as a light source will be described with reference to the drawings.

(First embodiment)
2 to 6 show an embodiment of a color correction illumination device according to the present invention.

  As shown in FIG. 2, this color correction illumination device (1) is mounted above a flat product display case (45) via arms (40) and (40) attached to both ends in the longitudinal direction. In this case, the product in the case is illuminated from directly above.

  The color correction illumination device (1) includes a main body (10), fluorescent lamps (20) and (21) and red LEDs (26) as light sources, reflectors (22) and (25), and electrical components for lighting the light sources. It is comprised by.

  As shown in FIGS. 3 to 5, the main body (10) is made of a plate material, and the side plates (12) and (12) on the long side of the rectangular upper surface plate (11) are inclined downward so that the side on the short side A light source mounting recess (14) is formed by hanging the face plate (13). The lower surface direction of the main body (10) is the main illumination direction. On the other hand, translucent resin plates (15) and (15) are attached to a window in which a part of the upper surface plate (11) is cut out, so that some light is emitted upward. The upward light alerts the viewer and is useful when a POP advertisement is attached to the top plate (11).

  There are four fluorescent lamps (20), (20), (21), and (21), each of which is a straight tube type of 54W and 24W, and two fluorescent lamps (20) ( 21) are arranged in the longitudinal direction and attached in two rows. Therefore, the light source mounting recess (14) is provided with a partition plate (16) at an intermediate portion in the longitudinal direction, and fluorescent lamps are provided on both surfaces of the partition plate (16) and the inner surface of the short side surface plate (13). A socket (17) is attached. The 54W fluorescent lamp (20) is a high color rendering fluorescent lamp of the FHF type, L color and average color rendering index (Ra) of 82 shown in Table 1, and the 24W fluorescent lamp (21) is different only in the W number. It is a high color rendering fluorescent lamp. (19) is a box for storing electrical components.

  The reflectors (22) and (25) are made of mirror-finished aluminum plates, and the longitudinal center of the main body (10), that is, between the two rows of fluorescent lamps (20), (20), (21) and (21). And the long side surface plate (12). Further, since the light source mounting recess (14) is divided in the longitudinal direction by the partition plate (16), the reflecting plate is also divided in the longitudinal direction, so that the two central reflecting plates (22) and the four left-right reflections are obtained. And a plate (25).

  As shown in FIGS. 2 to 5, the central reflector (22) is bent so that the central portion in the width direction protrudes downward, and the left and right rising surfaces (23) and (23) are left and right fluorescent lamps (20 ) (21) Reflective surface. In addition, the bottom surface (24) between the left and right rising surfaces (23) and (23) is a reflection surface of both fluorescent lamps, and a plurality of holes (27) for irradiating light from the red LED (26) are long. It is perforated at equal intervals in one row along the direction. 36 punch holes (27) are formed for the 54W fluorescent lamp (20) and 12 holes are formed for the 24W fluorescent lamp (21). The position of the red LED (26) on the substrate (28) to be described later is formed. It is formed to match. As shown in FIG. 6, the central reflector (22) has L-shaped members (18) attached to the short side plate (13) and the partition plate (16) of the main body (10) at both ends in the longitudinal direction. ). FIG. 6 shows a mounting structure on the side plate (13) side on the short side, and a similar mounting structure using an L-shaped member is also provided on the partition plate (16) side (not shown).

  On the other hand, the left and right reflectors (25) are screwed to a spacer (29) joined to the long side plate (12).

  The red LED 26 is an LED having peak wavelengths shown in Table 1 of about 635 nm, 130 mA, 24 W (0.5 W per LED). As shown in FIG. 6, a plurality of red LEDs (26) are mounted on the substrate (28) in a line at equal intervals. That is, 36 red LEDs (26) are mounted on the substrate (28) on the 54W fluorescent lamp (20) side, and 12 red LEDs (26) are mounted on the substrate (28) on the 24W fluorescent lamp (21) side. Is installed. Note that eight red LEDs (26) are mounted on one substrate (28), and six substrates (28) are used. These substrates (28) are screwed to the back surface of the central reflector (22) via spacers (30). By this spacer (30), the red LED (26) is fixed at a position slightly retracted from the reflecting surface, and cannot be seen from the outside unless viewed from the front of the punched hole (27). For this reason, the scattered red LEDs (26) can illuminate without attracting the line of sight and impairing the degree of attention to the product. In FIGS. 3 and 4, the screws for attaching the substrate (28) are not shown.

  As shown in FIG. 3, the arm (40) includes two pipe-like stays (41) (41), plates (42) attached to the upper portions of these stays (41) (41), and And a fitting member (43) having an inverted U-shaped cross section attached to the lower portion. Then, the plate (42) is screwed to the bent portion (13a) at the tip of the short side plate (13) of the main body (10) of the illuminating device (1), and the fitting member as shown in FIG. (43) is fitted into the upper edge (46) of the product display case (45), and further screwed. At this time, the power cord (not shown) of the illuminating device (1) is passed through the stay (41) from the through hole (32) of the bent portion (13a) and is taken out to the outside. Thereby, the color correction illumination device (1) is fixed above the product display case (45), and the product in the case is illuminated with the mixed light of the fluorescent lamps (20) (21) and the red LED (26).

  In the color correction illumination device (1), when four fluorescent lamps (20) and (21) (54W × 2, 24W × 2) and 48 red LEDs (26) are used, the ratio of luminous flux is The red LED is about 34 lm with respect to the fluorescent lamp 1000 lm.

(Second Embodiment)
7 to 9 show other embodiments of the color correction illumination device according to the present invention. This color correction illumination device (2) is attached to the top plate (49) of a multistage product display case (48) via a curved arm (47), and illuminates the product on the shelf from diagonally above. To do.

The color correction illumination device (2) includes a main body (50), a fluorescent lamp (20) as a light source, a red LED (26), a reflector (60), and an electrical component for lighting the light source. The fluorescent lamp (20) and the red LED (26) are the same as those used in Table 1 and the color correction illumination device (1).
As shown in FIGS. 8 and 9, the main body (50) is made of a plate material, and an upper surface plate (52) curved from the upper end of the rear surface plate (51) is extended, and side surface plates (53) ( By attaching (53), a light source mounting recess (54) is formed. In the light source mounting recess (54), a plate-shaped reflection plate stopper (55b) is screwed to a receiving metal (55a) protruding from the upper surface plate (52). Further, the rear plate (51) is provided with a groove (56) along the longitudinal direction, and a pair of two metal fittings (57) for attaching the arm (47) is fitted into the groove (56). (Only one is shown). Further, (58) is a box for storing electrical components, and (59) is a hole for taking out a power cord (not shown) from the main body (50).

  As the fluorescent lamp, one 54 W straight tube fluorescent lamp (20) is used, and a socket (17) for the fluorescent lamp is attached to the inner surface of the side plate (53).

  The reflecting plate (60) is made of a mirror-finished aluminum plate, and a flat plate portion (62) is extended from the rear end of the curved portion (61) disposed above the fluorescent lamp (20). The reflection plate (60) is screwed to the reflection plate fixing bracket (56) through a screw hole provided at the top of the bending portion (61). Further, 16 flat holes (63) for irradiating the light of the red LED (26) are formed in the flat plate portion (62) at regular intervals in a line along the longitudinal direction. The punched hole (63) is formed so as to match the position of a red LED (26) on a substrate (28) described later.

  Similarly to the color correction illumination device (1) of the first embodiment described above, 16 red LEDs (26) are mounted on the substrate (28) in a line at equal intervals, and the substrate (28) Screwed to the back surface of the flat plate portion (62) of the plate (60) through a spacer. With this spacer, the red LED (26) is fixed at a position slightly retracted from the reflecting surface, and cannot be seen from the outside unless it is viewed from the front of the punched hole (63). The method for attaching the substrate (28) is the same as that in the first embodiment, and is not shown.

  The arm (47) is joined to a base end portion on the product display case (48) side by a plate-shaped mounting bracket (not shown). Then, the tip of the arm (47) is screwed to the metal fitting (57) attached to the color correction illumination device (2), and the top plate (49 of the product display case (48) is attached via the metal fitting for attachment. ). The illumination direction can be appropriately adjusted according to the connection angle between the receiving metal fitting (58) and the arm (47). Thus, the color correction illumination device (2) is attached to the top plate (49) of the product display case (48), and the product in the case is mixed obliquely from the fluorescent lamp (20) and the red LED (26). Illuminate with.

  In the color correction illumination device (2), when one 54W fluorescent lamp (20) and 16 red LEDs (26) are used, the ratio of the luminous flux is about 34 lm for the red LED with respect to 1000 lm for the fluorescent lamp. is there.

  The color correction illumination device of the present invention is not limited to the two embodiments described above, and details can be arbitrarily changed without departing from the technical scope of the present invention.

  The mounting position of the red LED is not limited to the rear of the reflecting plate, and can be mounted on the reflecting plate or in front of the reflecting plate. The positional relationship between the fluorescent lamp and the red LED can also be set arbitrarily. It is not limited to attaching to a reflecting plate, It can also attach directly to a main body etc. Furthermore, the present invention includes a case where no reflector is provided.

  Further, the installation position of the color correction illumination device is not limited at all, and the color correction illumination device can be installed in the product display case by changing the shape of the main body. For example, the flat product display case (45) of FIG. 2 can be attached inside the upper edge (56), and the multistage product display case of FIG. It can also be installed on the lower surface of the plate. In addition to directly irradiating the article with light from a light source, a transparent light guide plate or the like can be used in combination.

  Furthermore, the illumination object of the color correction illumination device of the present invention is not limited to food, and can be used for illumination of various articles. Moreover, it is not limited to the illumination with respect to a specific article | item, It can use also as interior illumination.

  The color correction illumination device of the present invention has an effect of making red appear vividly. For this reason, for example, in a grocery store, it can be suitably used as a lighting device for foods containing red foods displayed in a product display case.

It is a spectral distribution map of a fluorescent lamp. It is a spectral distribution figure of the mixed light of a fluorescent lamp and red LED. It is a perspective view which shows the state which attached the example of the color correction illumination apparatus concerning this invention above the flat type product display case. FIG. 3 is an exploded perspective view of the color correction illumination device and arm of FIG. 2. FIG. 3 is a perspective view of the color correction illumination device of FIG. 2. It is the VV sectional view taken on the line of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a perspective view which shows the state which attached the other example of the color correction illumination apparatus concerning this invention to the top plate of a multistage type product display case. It is a disassembled perspective view of the color correction illumination apparatus of FIG. It is sectional drawing of the color correction illumination apparatus of FIG.

Explanation of symbols

1,2… Color correction lighting device
10, 50 ... Body
20… 54W fluorescent lamp (high color rendering fluorescent lamp)
21 ... 24W fluorescent lamp (high color rendering fluorescent lamp)
22 ... Central reflector (reflector)
27, 63 ... Punched holes
26 ... Red LED (Red Light Emitting Diode)
60 ... Reflector
63 ... Punching hole

Claims (6)

A color correction illumination device comprising a fluorescent lamp as a white light source and a red light emitting diode as a red light source, and illuminating with mixed light of the fluorescent lamp and the red light emitting diode. The color correction illumination device according to claim 1, wherein the red light emitting diode is a light emitting diode having a peak wavelength at 620 to 650 nm. 3. The color correction illumination device according to claim 1, wherein a luminous flux of the red light emitting diode is 6 to 65 lm (lumen) with respect to a luminous flux of 1000 lm (lumen) of the fluorescent lamp. The color correction illumination device according to any one of claims 1 to 3, wherein the fluorescent lamp is a high color rendering fluorescent lamp having an average color rendering index (Ra) of 80 or more. The color correction illumination device according to any one of claims 1 to 4, wherein a hole is formed in a reflector that guides light of the fluorescent lamp in an illumination direction, and a red light emitting diode is disposed behind the hole. The color correction illumination apparatus according to claim 1, wherein the color correction illumination apparatus is an illumination apparatus that illuminates food.

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