Lighting fixture and filter

Abstract

To improve comfort of lighting by a lighting fixture.SOLUTION: A lighting fixture 10 includes: a white light source 12; and a filter 20 disposed while being laminated on the white light source 12. In the lighting fixture 10, the filter 20 includes a plurality of element regions 30. The element regions 30 include one or more white element regions 32 and one or more chromatic color element regions 34. The chromatic color element regions 34 are arranged in a pattern having no regularity.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to lighting fixtures and filters. [Background technology]

[0002] Various attempts have been made to improve the comfort of lighting. For example, attempts have been made to improve the comfort of lighting by simulating a natural environment. For example, based on the fact that many people find sunlight filtering through trees to be comfortable, a combination of white light simulating sunlight and green light simulating light passing through leaves has been considered. Non-Patent Document 1 discloses a lighting fixture including a white light source and a filter laminated on the white light source. The filter has a pattern in which white and green areas are arranged, for example, in a checkerboard pattern. A portion of the light emitted from the white light source passes through the white area included in the filter to illuminate an illuminated area, such as a desk top, and another portion passes through the green area included in the filter to illuminate the illuminated area. Such a lighting fixture has the advantage of improving the comfort of lighting. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Riho Takizawa et al., "The Effect of Green Lighting on the Impression Evaluation of Space," Architectural Institute of Japan Technical Report, Architectural Institute of Japan, February 20, 2024, Vol. 30, No. 74, pp. 181-186 Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for further improvements in the comfort of lighting in lighting fixtures. The present inventors have further studied the comfort of lighting provided by such lighting fixtures and have found that the comfort of lighting can be dramatically improved by changing the pattern of chromatic colors such as green on the light-emitting surface of the lighting fixture to an irregular pattern that resembles the sunlight filtering through the leaves in real life.

[0005] The present invention has been made in consideration of the above points, and has an object to improve the comfort of lighting provided by a lighting fixture. [Means for solving the problem]

[0006] The lighting fixture of this embodiment is [1] A lighting device comprising a white light source and a filter disposed on the white light source, the filter includes a plurality of element regions; the plurality of element regions include one or more white element regions and one or more chromatic element regions, The chromatic color element regions are arranged in a random pattern, and are lighting fixtures.

[0007] The lighting fixture of this embodiment is [2] A lighting device as described in [1], wherein, when viewed from the normal direction of the filter, the plurality of element regions are arranged along a first direction and along a second direction non-parallel to the first direction.

[0008] The lighting fixture of this embodiment is [3] The chromatic color element region includes a first element region having a first brightness and a second element region having a second brightness different from the first brightness, the first element regions are arranged in an irregular pattern, The lighting device according to [1] or [2], wherein the second element regions are arranged in an irregular pattern.

[0009] The lighting fixture of this embodiment is [4] The chromatic color element region includes a third element region having a third brightness different from the first brightness and the second brightness, The lighting device according to [3], wherein the third element regions are arranged in an irregular pattern.

[0010] The lighting fixture of this embodiment is [5] The lighting device according to any one of [1] to [4], wherein the white element regions are arranged in an irregular pattern.

[0011] The lighting fixture of this embodiment is [6] The lighting device according to any one of [1] to [5], wherein the chromatic color element region has a green color.

[0012] The lighting fixture of this embodiment is [7] When the chromaticity of the green color in the CIE 1931 chromaticity diagram is (x, y), [6] The lighting device according to [6], wherein x is 0.15 or more and 0.35 or less, and y is 0.45 or more and 0.65 or less.

[0013] The filter of this embodiment is [8] A plurality of element regions; the plurality of element regions include one or more white element regions and one or more chromatic element regions, The chromatic color element regions are filters that are arranged in an irregular pattern. [Effects of the Invention]

[0014] According to the present invention, it is possible to improve the comfort of lighting provided by a lighting fixture. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram for explaining an embodiment of the present invention, showing an example of a lighting fixture. [Figure 2] FIG. 2 is a plan view showing a filter of the lighting fixture. [Figure 3] FIG. 3 is a diagram showing an example of an arrangement pattern of white element regions and chromatic color element regions in a filter. [Figure 4] FIG. 4 is a diagram showing the brightness of the chromatic color element regions in FIG. [Figure 5] FIG. 5 is a plan view showing an outline of the laboratory used in the experimental example. [Figure 6] FIG. 6 is a side view showing an outline of the laboratory used in the experimental example. [Figure 7] FIG. 7 is a diagram showing the arrangement pattern of the white element regions and chromatic element regions of the filter F used in the experimental example. [Figure 8] FIG. 8 is a graph showing the xy chromaticity of the chromatic color element region of the filter used in the experimental example. [Figure 9] FIG. 9 is a histogram showing the preference ratings for each filter color in the experimental example. [Figure 10] FIG. 10 is a histogram showing the preference ratings for each filter transmittance pattern in the experimental example. [Figure 11] FIG. 11 is a histogram showing the evaluation of the comfort of the office space for each filter color in the experimental example. [Figure 12] FIG. 12 is a histogram showing the evaluation of the comfort of the office space for each filter transmittance pattern in the experimental example. [Figure 13] FIG. 13 is a histogram showing the evaluation of comfort as a relaxing space for each filter color in the experimental example. [Figure 14] FIG. 14 is a histogram showing the evaluation of comfort as a relaxation space for each filter transmittance pattern in the experimental example. DETAILED DESCRIPTION OF THE INVENTION

[0016] An embodiment of the present invention will be described below with reference to the accompanying drawings. Note that in the drawings attached to this specification, the scale and aspect ratios may be changed from those of the actual objects for the sake of illustration and ease of understanding. The following embodiment is an example of an embodiment of the present invention. Therefore, the present invention should not be interpreted as being limited to these embodiments.

[0017] The term "sheet surface" refers to the surface that coincides with the direction in which the target sheet-like member extends when viewed from an overall and global perspective. The surface direction refers to the direction along the sheet surface of the sheet-like member. Furthermore, the normal direction used for a surface or sheet-like member refers to the direction in which the normal to the surface or sheet surface of the member extends.

[0018] Terms used in this specification that specify shapes, geometric conditions, and their degrees, such as "parallel," "orthogonal," and "identical," as well as values ​​of lengths and angles, are not to be construed as being bound by strict meanings, but rather as including a range within which similar functions can be expected.

[0019] Fig. 1 is a diagram for explaining one embodiment of the present invention, showing an example of a lighting device 10. The lighting device 10 includes a white light source 12 and a filter 20. Fig. 2 is a plan view showing the filter 20.

[0020] The white light source 12 is a device that emits white light. The type of white light source 12 is not particularly limited, and may be, for example, an LED (light-emitting diode), a fluorescent lamp, or a mercury lamp. In particular, an LED is preferable as the white light source 12 because it is small and has relatively low power consumption. The color temperature of the light emitted by the white light source 12 may be 3000 K or more and 7000 K or less. Preferably, the color temperature of the light emitted by the white light source 12 may be 4000 K or more and 6000 K or less. As an example, the color temperature of the light emitted by the white light source 12 may be 5000 K. In this embodiment, the color temperature is measured using a spectroradiometer CL-500A manufactured by Konica Minolta.

[0021] The white light source 12 has a light-emitting surface 15 that emits light. The light-emitting surface 15 faces the filter 20. The light-emitting surface 15 may be flat or curved. In this embodiment, the light-emitting surface 15 is flat. In this embodiment, the light-emitting surface 15 has a rectangular shape when viewed from the normal direction dn of the light-emitting surface 15. However, the light-emitting surface 15 may have other shapes, such as a circle, an ellipse, a triangle, a pentagon, a hexagon, or an octagon, when viewed from the normal direction dn.

[0022] The filter 20 is a member that transmits light emitted from the white light source 12. In this embodiment, the filter 20 has an overall sheet-like shape. The filter 20 has a light incident surface 22 and a light exit surface 24. Light emitted from the white light source 12 enters the filter 20 from the light incident surface 22, and light that passes through the filter 20 exits from the light exit surface 24. The light incident surface 22 faces the white light source 12. In particular, the light incident surface 22 faces the light emitting surface 15 of the white light source 12. The light incident surface 22 may be a flat surface or a curved surface. The light exit surface 24 may be a flat surface or a curved surface. The light incident surface 22 and the light exit surface 24 may extend parallel to each other. In this embodiment, the light emitting surface 15, the light incident surface 22, and the light exit surface 24 are all flat surfaces and extend parallel to each other. Therefore, the normal direction of the light-emitting surface 15, the normal direction of the light-entering surface 22, and the normal direction of the light-exiting surface 24 are all coincident with one another. In this embodiment, the normal direction of the light-emitting surface 15, the normal direction of the light-entering surface 22, and the normal direction of the light-exiting surface 24 are all referred to as normal directions dn.

[0023] The filter 20 includes a plurality of element regions 30. In this embodiment, the plurality of element regions 30 are arranged along a first direction d1 and a second direction d2. In this specification, "arranged" means "arranged side by side." The first direction d1 and the second direction d2 each extend along the sheet surface of the filter 20 (i.e., in the planar direction). The first direction d1 and the second direction d2 are not parallel to each other. The first direction d1 and the second direction d2 may be perpendicular to each other. In this case, the first direction d1, the second direction d2, and the normal direction dn are perpendicular to each other. In this embodiment, as shown in FIGS. 1 to 4, the first direction d1 and the second direction d2 are perpendicular to each other.

[0024] In this embodiment, each element region 30 has a rectangular shape when viewed from the normal direction dn. Of the two pairs of opposite sides of an element region 30, one pair of opposite sides extends along the first direction d1, and the other pair of opposite sides extends along the second direction d2. Two element regions 30 adjacent to each other in the first direction d1 may share one side. Two element regions 30 adjacent to each other in the second direction d2 may also share one side. A gap may be formed between two element regions 30 adjacent to each other in the first direction d1. A gap may be formed between two element regions 30 adjacent to each other in the second direction d2. Multiple element regions 30 may have the same shape. Multiple element regions 30 may have the same dimensions. Multiple element regions 30 may have the same area. Each element region 30 may have a square shape when viewed from the normal direction dn. Furthermore, without being limited to these, each element region 30 may have other shapes such as a circle, an ellipse, a triangle, a pentagon, a hexagon, or an octagon.

[0025] The plurality of element regions 30 include one or more white element regions 32 and one or more chromatic element regions 34. The white element region 32 has a function of emitting light incident from the white light source 12 from the light-emitting surface 24 without substantially changing the color of the light. The white element region 32 may be formed of a transparent member. In this specification, a member being transparent means that the member has a total light transmittance of 80% or more. The total light transmittance is measured in accordance with JIS K7361-1:1997. The light-entering surface 22 and the light-emitting surface 24 of the white element region 32 may each be formed flat, so that light incident from the light-entering surface 22 exits from the light-emitting surface 24 without being substantially diffused by the white element region 32. Alternatively, the light-entering surface 22 and / or the light-emitting surface 24 of the white element region 32 may be formed as a surface including irregularities, so that light incident from the light-entering surface 22 is diffused by the white element region 32 and exits from the light-emitting surface 24.

[0026] The chromatic color element regions 34 have a chromatic color and function to emit light emitted from the white light source 12 and incident on the element regions 30 as light having a predetermined chromatic color. Methods for imparting a chromatic color to the chromatic color element regions 34 include, for example, attaching a colored sheet to the surface of the chromatic color element regions 34 in the transparent film that constitutes the filter 20, or applying a colored paint. The colored sheet or paint may be provided on the light entrance surface 22 or on the light exit surface 24. As an alternative method, the material that constitutes the filter 20 in the chromatic color element regions 34 may itself be colored.

[0027] Examples of chromatic colors that the chromatic color element region 34 may have include green, red, yellow, and brown. Green is the color of common tree leaves and is therefore preferred. Red, yellow, and brown are also preferred colors of tree leaves in autumn. When the chromatic color element region 34 has green, when the chromaticity of this green in the CIE 1931 chromaticity diagram is (x, y), it is preferable that x is 0.15 or more and 0.35 or less, and y is 0.45 or more and 0.65 or less. More preferably, x is 0.25 or more and 0.35 or less, and y is 0.45 or more and 0.65 or less. Even more preferably, x is 0.30 or more and 0.35 or less, and y is 0.45 or more and 0.60 or less. Chromaticity is measured using a Konica Minolta CL-500A spectroradiometer.

[0028] All of the chromatic color element regions 34 included in one filter 20 may have the same color. That is, all of the chromatic color element regions 34 included in one filter 20 may have green. All of the chromatic color element regions 34 included in one filter 20 may have red. All of the chromatic color element regions 34 included in one filter 20 may have yellow. All of the chromatic color element regions 34 included in one filter 20 may have brown. Furthermore, all of the chromatic color element regions 34 included in one filter 20 may have the same chromaticity.

[0029] 3 is a diagram showing an example of an arrangement pattern of the white element regions 32 and the chromatic color element regions 34 in the filter 20. FIG. 4 is a diagram showing the brightness of the chromatic color element regions 34 in FIG.

[0030] The chromatic color element region 34 may have multiple types of element regions with different brightnesses. In the example shown in FIG. 3, the chromatic color element region 34 includes a first element region 341 having a first brightness and a second element region 342 having a second brightness different from the first brightness. Also, in the example shown in FIG. 3, the chromatic color element region 34 includes a third element region 343 having a third brightness different from the first and second brightnesses. In FIG. 4, the first brightness is represented by a, the high brightness by b, and the third brightness by c. The multiple first element regions 341 have the same brightness a. The multiple second element regions 342 have the same brightness b. The multiple third element regions 343 have the same brightness c. The second brightness b is greater than the first brightness a, and the third brightness c is greater than the second brightness b. That is, the magnitude relationship between the first brightness a, the second brightness b, and the third brightness c is as follows: First brightness a < Second brightness b < Third brightness c

[0031] The chromatic color element regions 34 are arranged in an irregular pattern. Here, the arrangement pattern of the chromatic color element regions 34 being "irregular" means that there is no repeating pattern of the chromatic color element regions 34 within one filter 20. Specifically, first, a divided region 36 (first divided region 361) is set, which groups together a total of nine element regions 30: three in the first direction d1 and three in the second direction d2. Next, another divided region 36 (second divided region 362) is set adjacent to this first divided region 361 from any direction. When the arrangement pattern of the chromatic color element regions 34 in the first divided region 361 is translated to the second divided region 362, if there is one or more chromatic color element regions 34 that do not match each other in chromaticity and / or lightness, the second divided region 362 is determined not to be a repeating pattern of the first divided region 361. When there are no second divided areas 362 that form a repeating pattern among all the divided areas 36 (first divided areas 361) that can be set within the filter 20, the chromatic color element areas 34 are considered to be arranged in a pattern that has no regularity. Note that when two divided areas 36 are "adjacent," this means that the two divided areas 36 share a part (including a single point) of the outer periphery of each divided area 36.

[0032] In this embodiment, the first element regions 341 are arranged in an irregular pattern, the second element regions 342 are arranged in an irregular pattern, the third element regions 343 are arranged in an irregular pattern, and the white element regions 32 are arranged in an irregular pattern. The "irregular" arrangement patterns of the first element regions 341 to the third element regions 343 and the white element regions 32 are defined in the same way as the "irregular" arrangement pattern of the chromatic color element regions 34 described above.

[0033] The lighting device 10 of this embodiment is a lighting device 10 comprising a white light source 12 and a filter 20 stacked on the white light source 12, wherein the filter 20 includes a plurality of element regions 30, each of which includes one or more white element regions 32 and one or more chromatic element regions 34, and the chromatic element regions 34 are arranged in an irregular pattern.

[0034] The filter 20 of this embodiment comprises a plurality of element regions 30, each of which includes one or more white element regions 32 and one or more chromatic element regions 34, and the chromatic element regions 34 are arranged in an irregular pattern.

[0035] In the past, in order to simulate the effect of sunlight filtering through the leaves under trees, it has been considered to use a lighting fixture in which areas emitting green light are arranged in a regular pattern, such as a checkerboard pattern. However, the comfort of lighting provided by such lighting fixtures was not sufficient. The present inventors further investigated the comfort of lighting provided by such lighting fixtures and found that the comfort of lighting can be improved by changing the pattern of chromatic colors, such as green, on the light-emitting surface of the lighting fixture to an irregular pattern that resembles the effect of sunlight filtering through the leaves in real life.

[0036] According to lighting fixture 10 and filter 20 of the present embodiment, chromatic color element regions 34 are arranged in a non-regular pattern, which increases the degree of freedom in arranging chromatic color element regions 34 and makes it possible to provide illumination with a color arrangement pattern that is closer to the color arrangement pattern of actual sunlight filtering through the leaves. This dramatically improves the comfort of lighting provided by lighting fixture 10.

[0037] In the lighting device 10 of this embodiment, when viewed from the normal direction dn of the filter 20, the multiple element regions 30 are arranged along a first direction d1 and also along a second direction d2 that is non-parallel to the first direction d1.

[0038] With this lighting device 10, it is possible to provide irregularity in the arrangement pattern of the chromatic color element regions 34 while arranging the element regions 30 in a regular pattern. Therefore, it is not necessary to make the arrangement pattern of the element regions 30 irregular, and the arrangement pattern of the element regions 30 can be easily determined. This makes it possible to easily produce a filter 20 having the element regions 30.

[0039] In the lighting device 10 of this embodiment, the chromatic color element region 34 includes a first element region 341 having a first brightness and a second element region 342 having a second brightness different from the first brightness, and the first element region 341 is arranged in an irregular pattern, and the second element region 342 is arranged in an irregular pattern.

[0040] In the lighting device 10 of this embodiment, the chromatic color element region 34 includes a third element region 343 having a third brightness different from the first brightness and the second brightness, and the third element region 343 is arranged in an irregular pattern.

[0041] In the lighting fixture 10 of this embodiment, the white element regions 32 are arranged in an irregular pattern.

[0042] With such a lighting device 10, the arrangement pattern of the first element region 341, the second element region 342, the third element region 343 and / or the white element region 32 has no regularity, which can impart further irregularity to the arrangement pattern of the chromatic element regions 34.

[0043] In the lighting fixture 10 of this embodiment, the chromatic color element region 34 has green color.

[0044] Such lighting fixture 10 can provide illumination similar to that of sunlight filtering through the leaves of a tree.

[0045] In lighting device 10 of this embodiment, when the chromaticity of green in the CIE 1931 chromaticity diagram is (x, y), x is equal to or greater than 0.15 and equal to or less than 0.35, and y is equal to or greater than 0.45 and equal to or less than 0.65.

[0046] In this lighting fixture 10, the chromatic color element regions 34 emit light of a slightly yellowish green color that is close to the color of Zelkova leaves. As shown in the experimental results described below, the chromatic color element regions 34 emitting light of this color can further improve the comfort of lighting provided by the lighting fixture 10.

[0047] An example of an experiment carried out by the present inventors will be described below, but the present invention is not limited to the following experimental example.

[0048] Fig. 5 is a plan view showing an outline of a laboratory 50 in an experimental example of the present invention. Fig. 6 is a side view showing an outline of a laboratory 50 in an experimental example of the present invention.

[0049] The dimensions of the experimental room 50 were 2500 mm wide x 2600 mm deep x 2600 mm high. A desk 53 was set up inside the experimental room 50. An adaptation room 55 was set up next to the experimental room 50. The front and right side of the subject 51 were separated by a white curtain 57. The walls not covered by the curtain 57 were white, and the floor was brown wood flooring. The opening was shielded with a blackout curtain. Reference numeral 59 denotes an operating PC.

[0050] The white light source 12 used was an LED panel light SKYPANEL S60 from ARRI. The dimensions of the light-emitting surface were 645 mm wide x 300 mm high. The color temperature of the illumination light was 5000 K. When this lighting was used, the illuminance on the top surface of the desk 53 was 500 lx. The white light source 12 was installed so that the center of its light-emitting surface was 2000 mm above the floor of the laboratory 50.

[0051] The filter 20 was made by attaching a green color LEE filter (31.25 mm × 30 mm) manufactured by LEE Filters to the portion of a 0.5 mm thick vinyl chloride sheet that served as the base material, which corresponded to the chromatic color element region 34. The filter 20 was made for each condition and attached to the light source for use.

[0052] The following three types of color LEE filters were used: F124: Filter number 124 (Dark Green), light transmittance 29.7% F089: Filter number 089 (Moss Green), light transmittance 29.8% F121ND: Filter number 121 (Lee Green) overlaid with an ND filter to adjust light transmittance, total light transmittance 32.3%

[0053] The arrangement pattern of the chromatic color element regions 34 is the same as the arrangement pattern described with reference to Figures 3 and 4. Therefore, the number of element regions 30 is 200. The light transmittance of the first element region 341 is 5%, the light transmittance of the second element region 342 is 15%, and the light transmittance of the third element region 343 is 30%.

[0054] The filters 20 were prepared using three types of color LEE filters: F124, F089, and F121ND. Using each color LEE filter, filters A to D were prepared, each with the same layout pattern as that described with reference to Figures 3 and 4, and filter F, in which chromatic color element regions 34 were arranged in a regular pattern. Filters A to D have different area ratios for element regions with a light transmittance of 30%, element regions with a light transmittance of 15%, and element regions with a light transmittance of 5%, as shown below. Figure 7 shows the pattern of filter F. Filter F includes white element regions 132 and chromatic color element regions 134. In filter F, the white element regions 132 and chromatic color element regions 134 are arranged in a regular pattern, resulting in virtually no variation in light transmittance. Experiments were conducted under a total of 15 conditions, combining the three types of color LEE filters and five different light transmittance patterns. The area ratios listed below for filters A to D refer to the number of corresponding element regions 30, totaling 200. A White: Area ratio of light transmittance 30%:15%:5% = 60:24:52:64 B White: Area ratio of light transmittance 30%:15%:5% = 60:64:52:24 C White: Area ratio of light transmittance 30%:15%:5% = 60:43:64:43 D White: Area ratio of light transmittance 30%:15%:5% = 60:4:52:84

[0055] Fig. 8 is a graph showing the xy chromaticity of the chromatic color element region 34 of the filter 20 used in the experiment. In Fig. 8, the curve marked Lb is the blackbody locus, and the curve marked Ls is the spectrum locus.

[0056] The subjects were 20 men and women in their 20s and 30s with normal color vision. Evaluation was conducted by subjective sensory evaluation. There were 20 evaluation items in total: 8 items for the impression of the space, 6 items for the room's limited use as an office space, and 6 items for the relaxation space. The evaluation was conducted using the SD method, in which each subject rated each item on a 7-point scale. The evaluation items are shown in Table 1.

[0057] [Table 1]

[0058] The experimental procedure was as follows: Steps 2 to 5 were repeated a predetermined number of times. 1. Procedure explanation (acclimatization room, 4 minutes) 2. 100-square calculation (laboratory, 30 seconds) 3. Indoor observation (laboratory, 10 seconds) 4. Evaluation Form (Laboratory, 2 minutes) 5. Waiting (acclimatization) (acclimatization room, 2 minutes) 6. Filling out paperwork (acclimatization room, 1 minute)

[0059] 9 to 14 are histograms showing the number of people who evaluated some of the items in Table 1. FIG. 9 shows the evaluation of preference for each filter color ("Preference" in Table 1). FIG. 10 shows the evaluation of preference for each filter transmittance pattern. FIG. 11 shows the evaluation of comfort as an office space for each filter color ("E. Comfort" in Table 1). FIG. 12 shows the evaluation of comfort as an office space for each filter transmittance pattern. FIG. 13 shows the evaluation of comfort as a relaxation space for each filter color ("L. Comfort" in Table 1). FIG. 14 shows the evaluation of comfort as a relaxation space for each filter transmittance pattern.

[0060] In color evaluation, the highest percentage of positive responses were F121ND, F89, and F124 for all items. In particular, the percentage of negative responses was 20% for "Preference" and "Re. Comfort," with no one stating "Very Disliked" or "Very Disliked." Furthermore, while the percentage of positive responses for F89 exceeded 50% for all three items, the number of people who answered "Very Liked" or "Very Comfortable" was less than 10%. Regarding filter pattern evaluation, patterns A and D for "Re. Comfort" and "Re. Comfort" received high ratings of approximately 70%. Pattern C also received a relatively high percentage of positive ratings for "Re. Comfort." Pattern B received low ratings of approximately 40% for all three items, with approximately 10% stating "Very Disliked" or "Very Disliked." Pattern F, which has uniform transmittance and a regular filter arrangement, received low ratings for approximately half of the responses. This suggests that, regardless of room use, varying transmittance and random arrangement is perceived as more comfortable and preferred than a uniform green output. [Explanation of symbols]

[0061] 10 Lighting fixtures 12 White light source 15 Light-emitting surface 20 filters 30 element area 32 White element area 34 Chromatic element area 341 First element area 342 Second element area 343 Third element area d1 1st direction d2 2nd direction dn normal direction

Claims

1. A lighting device comprising a white light source and a filter disposed on the white light source, the filter includes a plurality of element regions; the plurality of element regions include one or more white element regions and one or more chromatic element regions, A lighting fixture, wherein the chromatic color element regions are arranged in an irregular pattern.

2. 2. The lighting device according to claim 1, wherein, when viewed from a normal direction of the filter, the plurality of element regions are arranged along a first direction and along a second direction non-parallel to the first direction.

3. the chromatic color element regions include a first element region having a first brightness and a second element region having a second brightness different from the first brightness, the first element regions are arranged in an irregular pattern, The lighting device according to claim 1 , wherein the second element regions are arranged in an irregular pattern.

4. the chromatic color element region includes a third element region having a third lightness different from the first lightness and the second lightness, The lighting device according to claim 3 , wherein the third element regions are arranged in an irregular pattern.

5. The lighting device according to claim 1 , wherein the white element regions are arranged in a random pattern.

6. The lighting fixture of claim 1 , wherein the chromatic color element region has a green color.

7. When the chromaticity of the green color in the CIE 1931 chromaticity diagram is (x, y), 7. The lighting device according to claim 6, wherein x is equal to or greater than 0.15 and equal to or less than 0.35, and y is equal to or greater than 0.45 and equal to or less than 0.

65.

8. A plurality of element regions is provided, the plurality of element regions include one or more white element regions and one or more chromatic element regions, A filter in which the chromatic color element regions are arranged in an irregular pattern.

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