JP2006019095A - Illumination system and illumination adjustment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an illumination system and an illumination adjustment method capable of enhancing realistic sensation of a space with an image display device installed therein. <P>SOLUTION: A luminaire 2 (for instance, a horizontal light) with an optical axis adjusted so as to illuminate a rear wall W1 from the lower side is disposed on a raw board 100 behind the image display device 1; and a value (wall surface illuminance/floor surface illuminance) obtained by dividing an average value of illuminance (wall surface illuminance) of respective vertical surfaces at a measurement point distant nearly by 300 mm in the lateral direction from the left and right side ends of a display surface 1a of the image display device 1 and located at the vertical center height of the display surface 1a and at a measurement point distant nearly by 300 mm in the upper direction from the upper end of the display surface 1a and positioned at the lateral center of the display surface 1a by horizontal surface illuminance (floor surface illuminance) of a floor surface F positioned nearly at the center of a space connecting the image display device 1 and the viewing point of an image observing person A is set not smaller than 0.5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an indoor illumination system in which an image display device is installed, and an illumination adjustment method.

For the purpose of improving the visibility (ease of viewing) of an image display device such as a television receiver, the brightness of the display surface of the image display device and the brightness of a limited area in the left-right direction (side brightness) of the display surface There is a lighting device that defines the ratio of (For example, see Patent Document 1)
JP 2002-134285 A (paragraph number [0021], FIG. 1)

  In the above prior art, attention is paid to the visibility of the display surface, but the realism of the space is not taken into consideration. In general, when viewing images that reflect the preference of image viewers (image viewers), such as movies, sports competitions, music concerts, etc., not only the visibility but also the presence of the image information. A feeling is required.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide an illumination system and an illumination adjustment method capable of enhancing a sense of reality in a space where an image display device is installed. .

  The invention of claim 1 is located approximately 300 mm in the left-right direction from the left and right ends of the display surface of the image display device installed in front of the wall surface, and is located at the center height in the vertical direction of the display surface of the image display device. The first vertical surface illuminance of the wall surface and the second vertical surface of the wall surface which is approximately 300 mm upward from the upper end of the display surface of the image display device and located at the center in the left-right direction of the display surface of the image display device Illumination in which the value obtained by dividing the wall surface illuminance represented by the average value of the illuminance by the horizontal illuminance of the floor located at the approximate center of the space connecting the image display device and the viewpoint position of the image observer is 0.5 or more An instrument is provided.

  According to the present invention, the image observer can obtain a higher sense of presence in the image of the image display device than in the conventional illumination environment.

According to a second aspect of the present invention, in the first aspect, the luminaire has a luminance of about 1000 cd / m ² or more in a visual field region of about 30 ° from the position of the image observer around the image display device. % Of the wall surface, which is approximately 300 mm in the left-right direction from the left and right end portions of the display surface of the image display device and located at the center height in the vertical direction of the display surface of the image display device, A wall surface brightness expressed by an average value of the brightness of the wall surface located approximately 300 mm upward from the upper end of the display surface and located at the center in the left-right direction of the display surface of the image display device is A value obtained by dividing the average luminance at a substantially center is 0.1 or more.

  According to the present invention, the image observer can obtain higher visibility for the image of the image display device than the conventional illumination environment, and can obtain both the sense of realism in the space and the visibility of the image. Can do.

  According to a third aspect of the present invention, in the first aspect, the luminaire can adjust the horizontal illuminance of the floor surface, and a value obtained by dividing the wall surface illuminance by the horizontal illuminance of the floor surface is less than 0.5 to 0.00. It is variable between 5 or more.

  According to the present invention, an appropriate illumination environment can be obtained even when an image is not viewed.

A fourth aspect of the present invention is the lighting device according to the first aspect, wherein the lighting fixture can simultaneously adjust a first vertical surface illuminance of the wall surface, a second vertical surface illuminance of the wall surface, and a horizontal surface illuminance of the floor surface. The value obtained by dividing the wall surface illuminance by the horizontal illuminance on the floor is variable between less than 0.5 and 0.5 or more, and the value obtained by dividing the wall illuminance by the horizontal illuminance on the floor is When it is 0.5 or more, an area with a luminance of 1000 cd / m ² or more is less than about 0.003% in a visual field area of about 30 ° from the position of the image observer around the image display apparatus. The brightness of the wall surface located approximately 300 mm in the left-right direction from the left and right end portions of the display surface and located at the center height in the vertical direction of the display surface of the image display device, and upward from the upper end portion of the display surface of the image display device Left and right direction of display surface of image display device about 300 mm apart The walls luminance represented by an average value of the luminance of the wall located in the center, a value obtained by dividing a substantially center of the average luminance of the display surface of the image display apparatus is characterized in that a 0.1 or higher.

  According to the present invention, the image observer can obtain both a sense of realism in the space and ease of viewing the image while maintaining an appropriate illumination environment even when the image is not viewed.

  The invention according to claim 5 is located approximately 300 mm in the left-right direction from the left and right ends of the display surface of the image display device installed in front of the wall surface, and is positioned at the center height in the vertical direction of the display surface of the image display device. The average value of the vertical surface illuminance of the wall surface and the vertical surface illuminance of the wall surface which is approximately 300 mm upward from the upper end of the display surface of the image display device and located at the center in the left-right direction of the display surface of the image display device The wall surface illuminance represented is adjusted so that a value obtained by dividing the wall surface illuminance by the horizontal illuminance of the floor located substantially in the center of the space connecting the image display device and the viewpoint position of the image observer is 0.5 or more. And

  According to the present invention, the image observer can obtain a higher sense of presence in the image of the image display device than in the conventional illumination environment.

The invention of claim 6 is the invention according to claim 5, wherein the area having a luminance of 1000 cd / m ² or more is less than about 0.003% in a visual field area of about 30 ° centering on the image display device from the position of the image observer. The brightness of the wall surface, which is approximately 300 mm in the left-right direction from the left and right end portions of the display surface of the image display device and located at the center height in the vertical direction of the display surface of the image display device, and the upper end portion of the display surface of the image display device The wall luminance expressed by the average value of the luminance of the wall surface located approximately 300 mm away from the top and located at the center in the left-right direction of the display surface of the image display device is an average of the approximate center of the display surface of the image display device. An adjustment is made so that the value divided by the luminance is 0.1 or more.

  According to the present invention, the image observer can obtain higher visibility for the image of the image display device than the conventional illumination environment, and can obtain both the sense of realism in the space and the visibility of the image. Can do.

  As described above, according to the present invention, there is an effect that it is possible to provide an illumination system and an illumination adjustment method that can enhance the presence of the space in which the image display device is installed.

  First, experimental results that are the technical basis of the present invention will be described with reference to the drawings.

  A subjective evaluation experiment was conducted on the presence of space and the visibility (ease of viewing) of images using a larger image display device than a general home TV. The flow of this subjective evaluation experiment is shown below. 1. The image observer (subject) adapts to the dark room environment for 5 minutes. 2. The person who performs the experiment sets the lighting environment to be evaluated. 3. The image observer adapts to the set lighting environment for 1 minute. 4). The image observer observes the image on the image display device for about 2 minutes. 5. The image observer performs subjective evaluation on the impression of the space and the visibility of the observed image. 6). Repeat steps 2-5 for all lighting environments in which the experiment is performed.

  The actual environment used is shown in FIGS. The lighting environment was changed by changing the lighting fixture to be used and the dimming level of the lighting fixture. The experiment environment uses a living space L of a general home. The living space L is a substantially rectangular parallelepiped space, and a row board 100 is arranged on the floor F along the rear wall W1 on the rear wall W1 side of the living space L. The image display device 1 is placed on the raw board 100. A front wall W2 facing the rear wall W1 is located in front of the image display device 1, and an image observer A is located on the front wall W2 side. A side wall W3 and a light-shielding curtain 101 are provided on the right side when viewing the image display device 1 from the image viewer A, and a dining kitchen space DK exists on the left side. Here, the width of the living space L in the left-right direction is 3000 mm, and the observation distance in the front-rear direction from the rear wall W1 to the image observer A is 3500 mm.

  The ceiling surface W4 of the living space L has a height of 2400 mm from the floor surface F. One ceiling surface W4 is provided on each side of the image display device 1 in the left-right direction to illuminate the vicinity of the front of the image display device 1. A pair of downlights 10 a and a pair of downlights 10 b, an indirect light 11 that is formed to have substantially the same width as the horizontal direction of the image display device 1 and illuminates the front vicinity of the image display device 1, and the image display device 1 A spotlight 12 that is provided one on each side in the left-right direction and illuminates the rear wall W1 and a ceiling light 13 that is installed substantially in the center of the living space L and illuminates the entire living space L are attached. Here, the downlights 10a and 10b and the spotlight 12 are attached at a position 600 mm away from the rear wall W1, and the indirect light 11 is attached at a position 800 mm away from the rear wall W1. The ceiling light 13 is mounted at a position 1850 mm away from the front surface of the image display device 1 in the forward direction and 1600 mm away from the side wall W3 in the left direction. The distance between the pair of downlights 10a provided on the left and right sides of the image display device 1 is set to 1200 mm. Although the image display device 1 is arranged in the center of the pair of downlights 10a, the pair of downlights 10b are shifted to the right with respect to the image display device 1 due to the limitations of the laboratory used this time. Only one of the downlight 10a and the downlight 10b is turned on according to the lighting environment.

  Further, on the row board 100 on the rear side of the image display device 1, a horizont light 14 that is formed to have substantially the same width as the horizontal width of the image display device 1 and illuminates the rear wall W <b> 1 from below is disposed.

  Further, brackets 15 are attached to the rear wall W1 at a height of 1800 mm at intervals of 1700 mm with the image display device 1 interposed therebetween, and illuminate the rear wall W1 from above.

  The image display apparatus 1 used a plasma display with a screen size of 42 inches, and the evaluation image used one scene (about 2 minutes) of a movie. The image observer A was 14 men and women (age 27-38 years) who can judge the atmosphere of the lighting environment.

  In this experiment, as a position representative of the brightness of the rear wall W1 behind the image display device 1, as shown in FIG. 12, the distance X1 = left and right from the left and right ends of the display surface 1a of the image display device 1 is set. Measurement points P1 and P2 that are 310 mm apart and located at the center height in the vertical direction of the display surface 1a are employed. Furthermore, when the display surface 1a becomes larger, the observation distance becomes longer, and it is expected that the periphery (particularly the upper part) of the display surface 1a affects the visibility of the image. Therefore, the measurement point P3 located at the center of the display surface 1a in the left-right direction and the distance X1 = 310 mm upward from the upper end of the display surface 1a is also adopted as a position representing the brightness of the rear wall W1.

  In such an environment, first, an experiment is performed on the realistic sensation of the space, and the dimming control of each lamp makes it possible to measure the measurement points P1, P2 (first vertical surface illuminance) and P3 (second vertical illumination) of the rear wall W1. The horizontal plane illuminance (floor illuminance) of the floor F located at the approximate center of the space connecting the image display device 1 and the viewpoint position of the image observer A is the average value (wall illuminance) of each vertical surface illuminance). The image observer A evaluated the realistic sensation of the space under each experimental condition by changing the value divided by (wall illuminance / floor illuminance). Here, the evaluation of the presence was performed in seven stages from 1 (not very realistic) to 7 (very realistic). FIG. 13 is a graph showing the evaluation results. The horizontal axis indicates (wall illuminance / floor illuminance), the vertical axis indicates the evaluation value of realistic sensation, and the greater the (wall illuminance / floor illuminance), the more realistic The feeling is increasing.

Next, an experiment was conducted on the visibility of images. This is because each lamp is dimmed and controlled so that the average value (wall luminance) of each luminance at the measurement points P1 to P3 of the rear wall W1 is the average luminance (display) at the approximate center of the display surface 1a of the image display device 1. The value (wall surface brightness / display surface brightness) divided by (surface brightness) was changed, and image observer A evaluated the visibility of the image under each condition. Here, since a moving image is used as the image for evaluation, the display surface luminance is the average value of the sequential luminance at the approximate center of the display surface 1a, and the evaluation of the visibility is 1 (very difficult to see) to 7 (very easy to see). It was performed in 7 stages. As a result of this experiment, it has been found that the tendency of the evaluation results differs depending on whether the glare is present in the visual field of the image observer A or not. Therefore, the luminance distribution as viewed from the image observer A is measured under each experimental condition, and it is generally perceived as a light source within the visual field region of about 30 ° centering on the image display device 1 from the position of the image observer A. The analysis was performed assuming that the illumination environment in which the brightness of 1000 cd / m ² or more is less than 0.003% is not glare and the illumination environment of 0.003% or more is glare. FIG. 14 shows the results of area ratios with luminance of 1000 cd / m ² or more and the presence / absence of glare for 14 experimental conditions. FIG. 15 is a graph showing the evaluation results without glare, and FIG. 16 is a graph showing the evaluation results with glare. The horizontal axis is (wall surface luminance / display surface luminance), and the vertical axis is the evaluation value for ease of viewing. Indicates. When there is no glare, as (wall surface brightness / display surface brightness) approaches 1, the visibility is improved. In the presence of glare, it was found that the visibility was reduced as (wall surface brightness / display surface brightness) increased.

  In this experiment, the distance X1 (see FIG. 12) from the end of the display surface 1a to each of the measurement points P1 to P3 is 310 mm. However, if the distance X1 is approximately 300 mm, the above result of this experiment is obtained. In each embodiment described later, the distance X1 may be approximately 300 mm.

  Based on the above experimental results as technical basis, embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
From the evaluation experiment of realistic sensation shown in FIG. 13, the average value (wall illuminance) of each vertical surface illuminance at the measurement points P1 to P3 (see FIG. 12) of the rear wall W1 is the viewpoint of the image display device 1 and the image observer A. If the value (wall illuminance / floor illuminance) divided by the horizontal illuminance (floor illuminance) of the floor F located at the approximate center of the space connecting the positions is 0.5 or more, the evaluation value of the sense of presence is an intermediate value Therefore, the realistic sensation of the space is improved as compared with the general lighting environment.

  Therefore, in this embodiment, (wall illuminance / floor illuminance) is 0.5 or more, and the configuration is shown in FIG. The configuration of the living space L and the positional relationship between the image display device 1 on the row board 100 and the image observer A are substantially the same as those in FIGS. In the present embodiment, the distance X1 = 300 mm between the end of the display surface 1a of the image display device 1 in FIG. 12 and the measurement points P1 to P3.

  In the lighting system of the present embodiment, a lighting fixture 2 (for example, a horizont light) whose optical axis is adjusted so as to illuminate the rear wall W1 from below is disposed on the low board 100 on the rear side of the image display device 1. As shown in FIG. 2, the luminaire 2 has a light source 2b housed in a reflector 2a having a substantially U-shaped cross section, and is placed on the low board 100 via a base 2c attached to the reflector 2a. . The opening of the reflecting plate 2a is adjusted obliquely upward so as to illuminate the rear wall W1 from below, and has a light distribution that illuminates the rear wall W1 with priority. The light source 2b is a fluorescent lamp, a light bulb, an LED, or the like, and the type thereof is not limited. Note that parts not directly related to the present invention, such as a ballast and a power supply unit for turning on the light source 2b, are omitted.

  Thus, by arranging the lighting fixture 2 that illuminates the rear wall W1 on the rear side of the image display device 1, the (wall illuminance / floor illuminance) can be 0.5 or more, and as a result. The image observer A can obtain a higher sense of presence with respect to the image of the image display device 1 than in the conventional illumination environment.

  In addition, the distance X1 (refer FIG. 12) from the edge part of the display surface 1a to each measurement point P1-P3 is not limited to 300 mm, If the distance X1 is about 300 mm, the same effect can be acquired. .

(Embodiment 2)
In the illumination system of the present embodiment, as shown in FIG. 3, the luminaire 3 whose optical axis is adjusted so as to illuminate the rear wall W <b> 1 from above is attached to the ceiling surface W <b> 4 above the image display device 1.

  As shown in FIG. 4, the lighting fixture 3 includes a light source 3b housed in a reflecting plate 3a having a substantially U-shaped cross section, and is attached to a ceiling surface W4 via a pedestal 3c attached to the reflecting plate 3a. The opening of the reflecting plate 3a is adjusted obliquely downward so as to illuminate the rear wall W1 from above, and has a light distribution that illuminates the rear wall W1 with priority. The light source 3b is a fluorescent lamp, a light bulb, an LED or the like, and the type thereof is not limited. Note that portions not directly related to the present invention, such as a ballast and a power supply unit for turning on the light source 3b, are omitted.

  Thus, by attaching the lighting fixture 3 that illuminates the back wall W1 to the ceiling surface W4, (wall illuminance / floor illuminance) can be set to 0.5 or more. As a result, the image observer A Can obtain a higher sense of presence in the image of the image display device 1 than in the conventional lighting environment.

  Recently, the display surface size of household image display devices has become larger and wider (wider), so the observation distance has become longer than before, and as a result, the image display device 1 and the observation within the field of view to be observed. Regions other than the image display surface such as the floor surface F and the ceiling surface W4 with the person A are becoming larger. Therefore, even if only the influence of the side luminance of the image display surface is taken into consideration as in the conventional example, it is difficult to ensure optimal visibility.

Accordingly, from the evaluation experiment of visibility shown in FIG. 15, it is generally perceived as a light source in a glare-free illumination environment (a visual field of about 30 ° from the position of the image observer A centering on the image display device 1). In the case where the brightness of 1000 cd / m ² or more is less than 0.003%), the average value (wall brightness) of each brightness at the measurement points P1 to P3 (see FIG. 12) of the rear wall W1 is obtained. If the value divided by the average luminance at the approximate center of the display surface 1a (wall surface luminance / display surface luminance) is 0.1 or more, the evaluation value of visibility is 5.5 or more, which is compared with the general lighting environment. The visibility is improved. Here, the criterion of the evaluation value is set to 5.5 or more because the visibility of the image display apparatus 1 is not judged to be difficult to see except in a very bad lighting environment such as feeling glare, and is easy to see. This is because the evaluation of 4 is concentrated on 4 to 7, so that the evaluation values 4 to 7 are normalized, and an average evaluation value of 5.5 or higher is easier to see than the average. In the present embodiment, the distance X1 (see FIG. 12) from the end of the display surface 1a to each of the measurement points P1 to P3 is 300 mm, but the same effect can be obtained if the distance X1 is approximately 300 mm. .

  Therefore, the luminaire 3 of this embodiment illuminates the rear wall W1 behind the image display device 1 and distributes light so that no light source or reflected light enters the line of sight of the image observer A located in front of the image display device 1. The rear wall W1 behind the image display device 1 is illuminated so that the image observer A does not feel glare. Accordingly, the rear wall W1 can be efficiently brightened without glare, and (wall surface brightness / display surface brightness) can be made 0.1 or more. As a result, the image observer A can High visibility can be obtained for the image as compared with the conventional illumination environment, and the image is easy to see.

  Thus, in this embodiment, it is possible to obtain both a sense of space and ease of viewing an image.

  As a reference example, when only the visibility of an image is obtained, as shown in FIG. 5, a lighting fixture 9 attached to the ceiling surface W4 above the image display device 1 may be used.

  As shown in FIG. 6, the lighting fixture 9 includes a light source 9b housed in a reflector 9a having a substantially U-shaped cross section, and a housing 9c housing the reflector 9a is embedded in the ceiling surface W4. The opening of the reflecting plate 9a is formed downward so as to illuminate the image display device 1 from above.

  A light shielding plate 9d is provided below the front end of the lower end of the housing 9c so that the light source and the reflected light do not enter the line of sight of the image observer A. Although the size of the light shielding plate 9d varies depending on the size of the living space L and the lighting fixture 9, in a general living room as shown in FIGS. 10 and 11, it is approximately 0.6 times larger than the opening of the reflecting plate 9a. A light shielding plate 9d having a height of (tan 30 °) is appropriate. A reflector 9e is used on the rear surface of the light shielding plate 9d that cannot be seen by the image observer A in order to efficiently illuminate the rear wall W1. The reflecting material 9e may be diffused or mirrored.

  Accordingly, the rear wall W1 can be efficiently brightened without glare, and (wall surface brightness / display surface brightness) can be made 0.1 or more. As a result, the image observer A can High visibility can be obtained for the image as compared with the conventional illumination environment, and the image is easy to see.

(Embodiment 3)
In general living spaces, not only the purpose of viewing images, but various acts such as meals and social gatherings are performed. Therefore, as shown in FIG. 7, the illumination system of the present embodiment illuminates the entire room in the same way as a general illumination space when not viewing an image, and has a high presence as in the first and second embodiments when viewing an image. The lighting fixture 4 which can obtain a feeling is provided.

  The lighting fixture 4 of this embodiment is attached to the ceiling surface W4 of the living space L similar to Embodiments 1 and 2, and includes a lower illumination unit 41 that illuminates the lower direction, and a side illumination unit 42 that illuminates the side. Consists of The lower illumination unit 41 is configured by housing the annular fluorescent lamp 4b in a bowl-shaped cover 4a, and the side illumination unit 42 is provided with an annular reflector 4c having a substantially U-shaped cross section on the upper side of the cover 4a. Then, a circular fluorescent lamp 4d is housed in the reflecting plate 4c. Here, the fluorescent lamp 4d is smaller in diameter than the fluorescent lamp 4b, and the opening of the reflector 4c is formed on the side. The fluorescent lamp 4d illuminates the side from the entire periphery and does not illuminate the lower direction. It is shielded from light. Moreover, the lighting fixture 4 is attached to the ceiling surface W4 via the attachment part 4e which protruded upwards from the approximate center of the cover 4a.

  The luminaire 4 is configured to control the lighting of the lower illumination unit 41 and the side illumination unit 42 and the dimming control, the vertical surface illuminance at the measurement points P1 to P3 of the rear wall W1, the image display device 1, and the image observer A. The horizontal plane illuminance (floor illuminance) of the floor F located substantially in the center of the space connecting the viewpoint positions can be adjusted simultaneously, and the average value (wall illuminance) of each vertical plane illuminance at the measurement points P1 to P3 can be adjusted. The value (wall illuminance / floor illuminance) divided by the horizontal illuminance of the floor F is variable between less than 0.5 and 0.5 or more. Alternatively, only the horizontal illuminance of the floor surface F can be adjusted, and (wall illuminance / floor illuminance) may be variable between less than 0.5 and 0.5 or more.

  When the image of the image display device 1 is not viewed, the (wall illuminance / floor illuminance) is set to 0.5 by lighting only the lower illumination unit 41 or both the lower illumination unit 41 and the side illumination unit 42. As a result, the entire living space L can be illuminated brightly, and an appropriate lighting environment can be obtained even when the image is not viewed.

  On the other hand, when viewing the image of the image display device 1, only the side illumination unit 42 is turned on, or the dimming control is performed on both the lower illumination unit 41 and the side illumination unit 42, as in the first and second embodiments. (Wall illuminance / floor illuminance) is set to 0.5 or more, and a high sense of realism can be obtained as compared with the conventional illumination environment. Furthermore, the light source and the reflected light are prevented from entering the line of sight of the image observer A located in front of the image display apparatus 1 so that the glare is not perceived by the image observer A, and the rear of the image display apparatus 1 is rearward. The wall W1 is illuminated. Accordingly, the rear wall W1 can be efficiently brightened without glare, and (wall surface brightness / display surface brightness) can be made 0.1 or more. As a result, the image observer A can High visibility can be obtained for the image as compared with the conventional illumination environment, and the image is easy to see.

  As described above, in the present embodiment, it is possible to obtain both a sense of realism in the space and an easy-to-see image while maintaining an appropriate lighting environment even when the image is not viewed.

(Embodiment 4)
FIG. 8 shows the luminaire 4 of the present embodiment. The configuration of the side illuminator 42 is different from that of the third embodiment, and the side illuminators 42 are independent from each other every half circumference in the annular reflector 4c. Light sources 4g and 4h that can be dimmed are provided. Considering a general image observation state, the luminaire 4 is installed between the image observer A and the image display device 1 (not limited to the center). Therefore, when viewing the image of the image display device 1, illumination in the direction of the image observer A is not necessary, and the side illumination unit 42 does not need to illuminate the 360 ° direction over the entire circumference. Accordingly, the light source 4g of the side illumination unit 42 is directed to the rear wall W1 and the light source 4h is directed to the image viewer A side. When the image of the image display device 1 is not viewed, both the light sources 4g and 4h are turned on. When viewing the image, the light source 4g is turned on and the light source 4h is turned off, so that the realistic sensation of the space can be further improved and further energy saving can be realized.

(Embodiment 5)
FIG. 9 shows the luminaire 4 of the present embodiment, in which the light source 4h on the image observer A side of the fourth embodiment is omitted, and a light source 4g is provided in a semi-annular reflector 4f. Therefore, as in the fourth embodiment, it is possible to improve the realistic sensation of the space and save energy, simplify the dimming control block of the light source compared to the fourth embodiment, and realize cost reduction.

It is a side view which shows the structure of the illumination system of Embodiment 1 of this invention. It is side surface sectional drawing which shows the structure of a lighting fixture same as the above. It is a side view which shows the structure of the illumination system of Embodiment 2 of this invention. It is side surface sectional drawing which shows the structure of a lighting fixture same as the above. It is a side view which shows the reference example of an illumination system same as the above. It is side surface sectional drawing which shows the reference example of a lighting fixture same as the above. It is side surface sectional drawing which shows the structure of the lighting fixture of Embodiment 3 of this invention. It is side surface sectional drawing which shows the structure of the lighting fixture of Embodiment 4 of this invention. It is side surface sectional drawing which shows the structure of the lighting fixture of Embodiment 5 of this invention. It is a top view which shows the experimental environment of this invention. It is a side view which shows the same as the above. It is a top view which shows the illumination intensity measurement position same as the above. It is a figure which shows the experimental result of the realistic sensation of the space same as the above. It is a figure which shows the classification result of the presence or absence of glare for every experimental condition same as the above. It is a figure which shows the experimental result of the visibility of an image when there is no glare same as the above. It is a figure which shows the experimental result of the visibility of an image at the time of a glare same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image display apparatus 2 Lighting fixture 100 Low board A Image observer L Living space F Floor surface W1 Rear wall W4 Ceiling surface

Claims (6)

The first vertical of the wall surface located approximately 300 mm in the left-right direction from the left and right end portions of the display surface of the image display device installed in front of the wall surface and positioned at the center height in the vertical direction of the display surface of the image display device. It is expressed as an average value of the surface illuminance and the second vertical surface illuminance of the wall surface that is approximately 300 mm upward from the upper end of the display surface of the image display device and located at the center in the left-right direction of the display surface of the image display device. Characterized by comprising a luminaire in which the value obtained by dividing the wall illuminance by the horizontal illuminance of the floor located substantially in the center of the space connecting the image display device and the viewpoint position of the image observer is 0.5 or more. Lighting system. In the illumination apparatus, an area with a luminance of 1000 cd / m ² or more is less than about 0.003% within a visual field area of about 30 ° from the position of the image observer centering on the image display apparatus, and left and right of the display surface of the image display apparatus About 300 mm away from the side edge in the left-right direction and at the center height in the vertical direction of the display surface of the image display device, and approximately 300 mm away from the upper end of the display surface of the image display device, A value obtained by dividing the wall surface brightness represented by the average value with the brightness of the wall surface located at the center in the left-right direction of the display surface of the image display device by the average brightness at the approximate center of the display surface of the image display device is 0. The lighting system according to claim 1, wherein the number is one or more. The lighting fixture is capable of adjusting the horizontal illuminance of the floor surface, and a value obtained by dividing the wall surface illuminance by the horizontal illuminance of the floor surface is variable between less than 0.5 and 0.5 or more. The lighting system according to claim 1. The lighting fixture can simultaneously adjust a first vertical surface illuminance of the wall surface, a second vertical surface illuminance of the wall surface, and a horizontal surface illuminance of the floor surface, and the wall surface illuminance can be adjusted to a horizontal surface of the floor surface. When the value divided by the illuminance is variable between less than 0.5 and 0.5 or more, and the value obtained by dividing the wall surface illuminance by the horizontal illuminance on the floor surface is 0.5 or more, An area with a luminance of 1000 cd / m ² or more is less than about 0.003% in a visual field area of approximately 30 ° from the position centering on the image display apparatus, and is approximately in the left-right direction from the left and right end portions of the display surface of the image display apparatus. The brightness of the wall surface that is 300 mm apart and located at the center height in the vertical direction of the display surface of the image display device, and approximately 300 mm away from the upper end of the display surface of the image display device and about the display surface of the image display device Flatness with the brightness of the wall located in the center in the horizontal direction Lighting system according to claim 1, wherein the wall surface luminance represented by a value, the value obtained by dividing a substantially center of the average luminance of the display surface of the image display apparatus is characterized in that a 0.1 or higher. The vertical surface illuminance of the wall surface, which is approximately 300 mm in the left-right direction from the left and right ends of the display surface of the image display device installed in front of the wall surface and is located at the center height in the vertical direction of the display surface of the image display device The wall surface illuminance represented by the average value of the vertical surface illuminance of the wall surface that is approximately 300 mm away from the upper end of the display surface of the image display device and located at the center in the left-right direction of the display surface of the image display device, An illumination adjustment method, wherein a value obtained by dividing by a horizontal plane illuminance of a floor located substantially in the center of a space connecting an image display device and an image observer's viewpoint position is adjusted to 0.5 or more. An area with a luminance of 1000 cd / m ² or more is less than about 0.003% in a visual field area of about 30 ° from the position of the image observer centering on the image display apparatus, and from the left and right end portions of the display surface of the image display apparatus. The brightness of the wall surface that is approximately 300 mm away in the left-right direction and located at the center height in the up-down direction of the display surface of the image display device, and approximately 300 mm away from the upper end of the display surface of the image display device. The value obtained by dividing the wall luminance represented by the average value with the luminance of the wall surface located at the center in the left-right direction of the display surface by the average luminance at the approximate center of the display surface of the image display device is 0.1 or more. The illumination adjustment method according to claim 5, wherein the adjustment is performed as follows.

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