JP2006019095A - Illumination system and illumination adjustment method - Google Patents

Illumination system and illumination adjustment method Download PDF

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JP2006019095A
JP2006019095A JP2004194480A JP2004194480A JP2006019095A JP 2006019095 A JP2006019095 A JP 2006019095A JP 2004194480 A JP2004194480 A JP 2004194480A JP 2004194480 A JP2004194480 A JP 2004194480A JP 2006019095 A JP2006019095 A JP 2006019095A
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image display
display device
illuminance
image
wall
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JP4797340B2 (en
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Takashi Saito
孝 斎藤
Takeshi Hino
剛 日野
Wataru Iwai
彌 岩井
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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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

本発明は、画像表示装置が設置されている室内の照明システム、および照明調整方法に関するものである。   The present invention relates to an indoor illumination system in which an image display device is installed, and an illumination adjustment method.

テレビジョン受像機等の画像表示装置の視認性（見やすさ）の向上を目的として、画像表示装置の表示面輝度と、表示面の左右方向のある限定された領域の輝度（側方輝度）との比率を規定した照明装置がある。（例えば、特許文献１参照）
特開２００２−１３４２８５号公報（段落番号［００２１］、図１） 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)

上記従来技術では、表示面の見やすさには注目しているが、空間の臨場感については考慮されていない。一般に、映画、スポーツ競技、音楽コンサート等のように画像観察者（画像の鑑賞者）の嗜好性がより反映される画像を見る場合は、視認性だけでなく、その画像情報にのめり込むような臨場感が要求される。   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.

本発明は、上記事由に鑑みてなされたものであり、その目的は、画像表示装置が設置されている空間の臨場感を高めることが可能な照明システム、および照明調整方法を提供することにある。   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. .

請求項１の発明は、壁面の前方に設置された画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の第１の鉛直面照度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の第２の鉛直面照度との平均値で表される壁面照度を、画像表示装置と画像観察者の視点位置とを結ぶ空間の略中央に位置する床面の水平面照度で除した値が０．５以上となる照明器具を備えることを特徴とする。   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.

この発明によれば、画像観察者は、画像表示装置の画像に対して、従来の照明環境に比べて高い臨場感を得ることができる。   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.

請求項２の発明は、請求項１において、前記照明器具は、画像観察者の位置から画像表示装置を中心に略３０°の視野領域内において輝度１０００ｃｄ／ｍ２以上の領域を略０．００３％未満とし、画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の輝度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の輝度との平均値で表される壁面輝度を、画像表示装置の表示面の略中央の平均輝度で除した値を０．１以上とすることを特徴とする。 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.

この発明によれば、画像観察者は、画像表示装置の画像に対して、従来の照明環境に比べて高い視認性を得ることができ、空間の臨場感と画像の見やすさとの両方を得ることができる。   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.

請求項３の発明は、請求項１において、前記照明器具は前記床面の水平面照度を調整可能であり、前記壁面照度を前記床面の水平面照度で除した値が０．５未満から０．５以上の間で可変となることを特徴とする。   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.

この発明によれば、画像を見ない時にも適切な照明環境とすることができる。   According to the present invention, an appropriate illumination environment can be obtained even when an image is not viewed.

請求項４の発明は、請求項１において、前記照明器具は、前記壁面の第１の鉛直面照度と、前記壁面の第２の鉛直面照度と、前記床面の水平面照度とを同時に調整可能であり、前記壁面照度を前記床面の水平面照度で除した値が０．５未満から０．５以上の間で可変となって、前記壁面照度を前記床面の水平面照度で除した値が０．５以上の時は、画像観察者の位置から画像表示装置を中心に略３０°の視野領域内において輝度１０００ｃｄ／ｍ２以上の領域が略０．００３％未満であり、画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の輝度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の輝度との平均値で表される壁面輝度を、画像表示装置の表示面の略中央の平均輝度で除した値が０．１以上となることを特徴とする。 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.

この発明によれば、画像を見ない時にも適切な照明環境としながら、画像観察者は、空間の臨場感と画像の見やすさとの両方を得ることができる。   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.

請求項５の発明は、壁面の前方に設置された画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の鉛直面照度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の鉛直面照度との平均値で表される壁面照度を、画像表示装置と画像観察者の視点位置とを結ぶ空間の略中央に位置する床面の水平面照度で除した値が０．５以上となるように調整することを特徴とする。   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

この発明によれば、画像観察者は、画像表示装置の画像に対して、従来の照明環境に比べて高い臨場感を得ることができる。   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.

請求項６の発明は、請求項５において、画像観察者の位置から画像表示装置を中心に略３０°の視野領域内において輝度１０００ｃｄ／ｍ２以上の領域が略０．００３％未満であり、画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の輝度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の輝度との平均値で表される壁面輝度を、画像表示装置の表示面の略中央の平均輝度で除した値が０．１以上となるように調整することを特徴とする。 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.

この発明によれば、画像観察者は、画像表示装置の画像に対して、従来の照明環境に比べて高い視認性を得ることができ、空間の臨場感と画像の見やすさとの両方を得ることができる。   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.

以上説明したように、本発明では、画像表示装置が設置されている空間の臨場感を高めることが可能な照明システム、および照明調整方法を提供することができるという効果がある。   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.

まず、本発明の技術根拠となる実験結果について図面に基づいて説明する。   First, experimental results that are the technical basis of the present invention will be described with reference to the drawings.

一般の家庭用テレビに比べて大きな画像表示装置を用いて空間の臨場感と画像の視認性（見やすさ）とについて主観評価実験を行った。この主観評価実験の流れを以下に示す。１．画像観察者（被験者）は暗室環境に５分間順応する。２．実験を行う者は評価する照明環境に設定する。３．画像観察者は設定された照明環境に１分間順応する。４．画像観察者は画像表示装置の画像を約２分間観察する。５．画像観察者は空間の印象や観察した画像の見やすさについて主観評価を行う。６．上記手順２〜５を実験を行う全ての照明環境について繰り返す。   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.

実際に使用した環境を図１０、図１１に示す。照明環境の変更は使用する照明器具、およびその照明器具の調光レベルを変化させることで対応した。実験環境は、一般家庭のリビング空間Ｌを用い、リビング空間Ｌは略直方体状の空間であり、リビング空間Ｌの後壁Ｗ１側にはローボード１００が後壁Ｗ１に沿って床面Ｆ上に配置され、ローボード１００上には画像表示装置１が載置されている。そして、画像表示装置１の前方には後壁Ｗ１に対向した前壁Ｗ２があり、この前壁Ｗ２側には画像観察者Ａが位置する。画像観察者Ａから画像表示装置１方向を見て右側には側壁Ｗ３と遮光カーテン１０１とが設けられ、左側にはダイニングキッチン空間ＤＫが存在する。ここで、リビング空間Ｌの左右方向の幅は３０００ｍｍであり、後壁Ｗ１から画像観察者Ａまでの前後方向の観測距離は３５００ｍｍである。   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.

リビング空間Ｌの天井面Ｗ４は床面Ｆから２４００ｍｍの高さがあり、この天井面Ｗ４には、画像表示装置１の左右方向両側に１つづつ設けられて画像表示装置１の前方近傍を照らす一対のダウンライト１０ａおよび一対のダウンライト１０ｂと、画像表示装置１の左右方向の幅と略同一幅に形成されて画像表示装置１の前方近傍を照らす間接光ライト１１と、画像表示装置１の左右方向両側に１つづつ設けられて後壁Ｗ１を照らすスポットライト１２と、リビング空間Ｌの略中央に設置されてリビング空間Ｌ全体を照らすシーリングライト１３とが取り付けられる。ここで、ダウンライト１０ａ，１０ｂおよびスポットライト１２は、後壁Ｗ１から前方向に６００ｍｍ離れた位置に取り付けられ、間接光ライト１１は、後壁Ｗ１から前方向に８００ｍｍ離れた位置に取り付けられ、シーリングライト１３は、画像表示装置１の前面から前方向に１８５０ｍｍ離れ、且つ側壁Ｗ３から左方向に１６００ｍｍ離れた位置に取り付けられる。また、画像表示装置１の左右に設けられた一対のダウンライト１０ａの間隔は１２００ｍｍに設定される。なお、１対のダウンライト１０ａの中央に画像表示装置１は配置されるが、今回用いた実験室の制約上、１対のダウンライト１０ｂは、画像表示装置１に対して右にずれた位置に設けられており、ダウンライト１０ａとダウンライト１０ｂとは照明環境に応じていずれか一方のみが点灯する。   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.

さらに、画像表示装置１の後側のローボード１００上には、画像表示装置１の左右方向の幅と略同一幅に形成されて後壁Ｗ１を下方から照らすホリゾントライト１４が配置されている。   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.

また、後壁Ｗ１の高さ１８００ｍｍの位置には、画像表示装置１を挟んでブラケット１５が１７００ｍｍ間隔で取り付けられ、後壁Ｗ１を上方から照らしている。   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.

なお、画像表示装置１は画面サイズ４２インチのプラズマディスプレイを用い、評価画像はある映画の１シーン（約２分間）を用いた。画像観察者Ａは照明環境の雰囲気を判断することができる男女１４名（年齢２７〜３８歳）とした。   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.

本実験では、画像表示装置１の後方にある後壁Ｗ１の明るさを代表する位置として、図１２に示すように画像表示装置１の表示面１ａの左右側端部から左右方向に距離Ｘ１＝３１０ｍｍ離れ、且つ表示面１ａの上下方向の中心高さに位置する測定点Ｐ１，Ｐ２を採用した。さらに、表示面１ａが大きくなると観測距離が長くなり、表示面１ａの周囲（特に上部）が画像の視認性に影響することが予想された。そこで、表示面１ａの上端部から上方向に距離Ｘ１＝３１０ｍｍ離れ、且つ表示面１ａの左右方向の中心に位置する測定点Ｐ３も後壁Ｗ１の明るさを代表する位置として採用した。   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.

このような環境において、まず空間の臨場感について実験を行い、各ランプを調光制御することで、後壁Ｗ１の測定点Ｐ１，Ｐ２（第１の鉛直面照度）およびＰ３（第２の鉛直面照度）における各鉛直面照度の平均値（壁面照度）を、画像表示装置１と画像観察者Ａの視点位置とを結ぶ空間の略中央に位置する床面Ｆの水平面照度（床面照度）で除した値（壁面照度／床面照度）を変化させて、画像観察者Ａが各実験条件での空間の臨場感を評価した。ここで、臨場感の評価は、１（非常に臨場感がない）〜７（非常に臨場感がある）の７段階で行った。図１３はその評価結果をグラフに表したもので、横軸は（壁面照度／床面照度）、縦軸が臨場感の評価値を示し、（壁面照度／床面照度）が大きいほど、臨場感が増している。   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.

次に、画像の見やすさについて実験を行った。これは、各ランプを調光制御することで、後壁Ｗ１の測定点Ｐ１〜Ｐ３における各輝度の平均値（壁面輝度）を、画像表示装置１の表示面１ａの略中央の平均輝度（表示面輝度）で除した値（壁面輝度／表示面輝度）を変化させて、画像観察者Ａが各条件での画像の見やすさを評価した。ここで、評価用の画像は動画像を用いたため、表示面輝度は表示面１ａ略中央の逐次輝度の平均値とし、見やすさの評価は、１（非常に見にくい）〜７（非常に見やすい）の７段階で行った。この実験の結果、画像観察者Ａの視野内にグレアが有る場合と、グレアが無い場合とで評価結果の傾向が異なることがわかった。そこで、各実験条件で画像観察者Ａからみた輝度分布測定を行い、画像観察者Ａの位置から画像表示装置１を中心に略３０°の視野領域内において、一般的に光源であると知覚される輝度１０００ｃｄ／ｍ２以上の領域が０．００３％未満の照明環境をグレア無し、０．００３％以上の照明環境をグレア有りとして解析を行った。図１４は、１４個の実験条件について、輝度１０００ｃｄ／ｍ２以上の領域比率、グレア有無の分類の各結果を示す。そして、図１５はグレア無し時の評価結果、図１６はグレア有り時の評価結果をグラフに各々表したもので、横軸は（壁面輝度／表示面輝度）、縦軸が見やすさの評価値を示す。グレア無し時においては、（壁面輝度／表示面輝度）が１に近付くほど、見やすさが向上する。グレア有り時においては、（壁面輝度／表示面輝度）が大きくなると見やすさが低下することがわかった。 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.

なお本実験では、表示面１ａの端部から各測定点Ｐ１〜Ｐ３までの距離Ｘ１（図１２参照）を３１０ｍｍとしたが、距離Ｘ１は略３００ｍｍであれば、本実験の上記結果を得ることができ、後述する各実施形態において距離Ｘ１は略３００ｍｍであればよい。   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.

上記実験結果を技術根拠として、以下、本発明の実施の形態を図面に基づいて説明する。   Based on the above experimental results as technical basis, embodiments of the present invention will be described below with reference to the drawings.

（実施形態１）
図１３に示す臨場感の評価実験から、後壁Ｗ１の測定点Ｐ１〜Ｐ３（図１２参照）における各鉛直面照度の平均値（壁面照度）を、画像表示装置１と画像観察者Ａの視点位置とを結ぶ空間の略中央に位置する床面Ｆの水平面照度（床面照度）で除した値（壁面照度／床面照度）を０．５以上とすると、臨場感の評価値が中間値である４を超え、一般の照明環境と比較して空間の臨場感が向上する。 (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.

そこで本実施形態は、（壁面照度／床面照度）を０．５以上にしたもので、その構成を図１に示す。リビング空間Ｌの構成、およびローボード１００上の画像表示装置１と画像観察者Ａとの位置関係は図１０、図１１と略同様である。なお本実施形態では、図１２における画像表示装置１の表示面１ａの端部と各測定点Ｐ１〜Ｐ３との距離Ｘ１＝３００ｍｍとした。   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.

本実施形態の照明システムでは、画像表示装置１の後側のローボード１００上に、後壁Ｗ１を下方から照らすように光軸を調整した照明器具２（例えばホリゾントライト）が配置されている。照明器具２は、図２に示すように、断面略Ｕ字状の反射板２ａ内に光源２ｂが収納され、反射板２ａに取着した台座２ｃを介してローボード１００上に載置されている。反射板２ａの開口は後壁Ｗ１を下方から照らすように斜め上方向に調整されて、後壁Ｗ１を重点的に照らすような配光としている。光源２ｂは蛍光灯、電球、ＬＥＤ等であり、その種類は限定されない。なお、光源２ｂを点灯させるための安定器や電源ユニット等の本発明とは直接関係のない部分は省略している。   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.

このように、後壁Ｗ１を重点的に照らす照明器具２を画像表示装置１の後側に配置することで、（壁面照度／床面照度）を０．５以上にすることができ、その結果、画像観察者Ａは、画像表示装置１の画像に対して、従来の照明環境に比べて高い臨場感を得ることができる。   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.

なお、表示面１ａの端部から各測定点Ｐ１〜Ｐ３までの距離Ｘ１（図１２参照）は３００ｍｍに限定されるものではなく、距離Ｘ１は略３００ｍｍであれば同様の効果を得ることができる。   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. .

（実施形態２）
本実施形態の照明システムでは、図３に示すように、後壁Ｗ１を上方から照らすように光軸を調整した照明器具３を、画像表示装置１の上方の天井面Ｗ４に取り付けている。 (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.

照明器具３は、図４に示すように、断面略Ｕ字状の反射板３ａ内に光源３ｂが収納され、反射板３ａに取着した台座３ｃを介して天井面Ｗ４に取り付けられている。反射板３ａの開口は後壁Ｗ１を上方から照らすように斜め下方向に調整されて、後壁Ｗ１を重点的に照らすような配光としている。光源３ｂは蛍光灯、電球、ＬＥＤ等であり、その種類は限定されない。なお、光源３ｂを点灯させるための安定器や電源ユニット等の本発明とは直接関係のない部分は省略している。   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.

このように、後壁Ｗ１を重点的に照らす照明器具３を天井面Ｗ４に取り付けることで、（壁面照度／床面照度）を０．５以上にすることができ、その結果、画像観察者Ａは、画像表示装置１の画像に対して、従来の照明環境に比べて高い臨場感を得ることができる。   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.

また最近、家庭用画像表示装置の表示面サイズが大型化および横長化（ワイド化）してきているため、観測距離が従来よりも長くなり、結果として、観察する視野内において画像表示装置１と観察者Ａとの間の床面Ｆや天井面Ｗ４等の画像表示面以外の領域が大きくなってきている。したがって、従来例のように画像表示面の側方輝度の影響だけを考慮したとしても、見やすさを最適に確保することが難しくなっている。   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.

したがって、図１５に示す見やすさの評価実験から、グレアが無い照明環境（画像観察者Ａの位置から画像表示装置１を中心に略３０°の視野領域内において、一般的に光源であると知覚される輝度１０００ｃｄ／ｍ２以上の領域が０．００３％未満）の場合、後壁Ｗ１の測定点Ｐ１〜Ｐ３（図１２参照）における各輝度の平均値（壁面輝度）を、画像表示装置１の表示面１ａの略中央の平均輝度で除した値（壁面輝度／表示面輝度）を０．１以上とすると、見やすさの評価値が５．５以上となり、一般の照明環境と比較して見やすさが向上する。ここで評価値の基準を５．５以上としたのは、画像表示装置１の見やすさは、グレアを感じる等の非常に劣悪な照明環境以外では、見にくいと判断されることはなく、見やすさの評価は４〜７に集中するので、評価値４〜７までを正規化し、その平均値である評価値５．５以上であれば平均よりも見やすいといえるからである。なお、本実施形態では表示面１ａの端部から各測定点Ｐ１〜Ｐ３までの距離Ｘ１（図１２参照）を３００ｍｍとしているが、距離Ｘ１は略３００ｍｍであれば同様の効果を得ることができる。 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. .

そこで本実施形態の照明器具３は、画像表示装置１後方の後壁Ｗ１を照らし、且つ画像表示装置１前方に位置する画像観察者Ａの視線に光源や反射光が入らないように配光を調整しており、画像観察者Ａにグレアを感じさせないようにして、画像表示装置１後方の後壁Ｗ１を照らしている。したがって、グレアが無い状態で後壁Ｗ１を効率よく明るくして、（壁面輝度／表示面輝度）を０．１以上にすることができ、その結果、画像観察者Ａは、画像表示装置１の画像に対して、従来の照明環境に比べて高い視認性を得ることができ、見やすい画像となる。   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.

このように、本実施形態では空間の臨場感と画像の見やすさとの両方を得ることができる。   Thus, in this embodiment, it is possible to obtain both a sense of space and ease of viewing an image.

なお参考例として、画像の見やすさのみを得る場合には、図５に示すように、画像表示装置１の上方の天井面Ｗ４に取り付けられた照明器具９を用いればよい。   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.

照明器具９は、図６に示すように、断面略Ｕ字状の反射板９ａ内に光源９ｂが収納され、反射板９ａを収納したハウジング９ｃを天井面Ｗ４に埋め込んでいる。反射板９ａの開口は画像表示装置１を上方から照らすように下方向に形成される。   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.

そして、画像観察者Ａの視線に光源や反射光が入らないように、ハウジング９ｃの下端前辺から下方に遮光板９ｄを設けている。遮光板９ｄの大きさは、リビング空間Ｌや照明器具９の大きさによって異なるが、図１０、図１１に示すような一般的なリビングでは、反射板９ａの開口に対して略０．６倍（ｔａｎ３０°）の高さの遮光板９ｄが適切である。画像観察者Ａから見えない遮光板９ｄの後面には、後壁Ｗ１を効率的に照らすために反射材９ｅを用いている。反射材９ｅは拡散、鏡面は問わない。   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.

したがって、グレアが無い状態で後壁Ｗ１を効率よく明るくして、（壁面輝度／表示面輝度）を０．１以上にすることができ、その結果、画像観察者Ａは、画像表示装置１の画像に対して、従来の照明環境に比べて高い視認性を得ることができ、見やすい画像となる。   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.

（実施形態３）
一般的な居住空間では画像を見ることだけが目的ではなく、食事や団欒等の様々な行為が行われている。そこで本実施形態の照明システムは、図７に示すように、画像を見ない時は一般的な照明空間と同様に部屋全体を照明し、画像を見る時には実施形態１，２と同様に高い臨場感を得ることができる照明器具４を備えている。 (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.

本実施形態の照明器具４は、実施形態１、２と同様のリビング空間Ｌの天井面Ｗ４に取り付けられるもので、下方向を照らす下方照明部４１と、側方を照らす側方照明部４２とから構成される。下方照明部４１は、環形の蛍光灯４ｂを椀型のカバー４ａ内に収納して構成され、側方照明部４２は、カバー４ａの上側に断面略Ｕ字状の環形の反射板４ｃを設けて反射板４ｃ内に環形の蛍光灯４ｄを収納して構成される。ここで、蛍光灯４ｄは蛍光灯４ｂより径が小さく、反射板４ｃの開口は側方に形成されており、蛍光灯４ｄは、その全周から側方を照明し、下方向を照明しないように遮光されている。また、照明器具４はカバー４ａの略中央から上方に突設した取付部４ｅを介して天井面Ｗ４に取り付けられる。   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.

この照明器具４は、下方照明部４１および側方照明部４２の点灯制御、調光制御によって、後壁Ｗ１の測定点Ｐ１〜Ｐ３における各鉛直面照度と、画像表示装置１と画像観察者Ａの視点位置とを結ぶ空間の略中央に位置する床面Ｆの水平面照度（床面照度）とを同時に調整可能であり、測定点Ｐ１〜Ｐ３における各鉛直面照度の平均値（壁面照度）を上記床面Ｆの水平面照度で除した値（壁面照度／床面照度）が、０．５未満から０．５以上の間で可変となる。あるいは、上記床面Ｆの水平面照度のみを調整可能として、（壁面照度／床面照度）を０．５未満から０．５以上の間で可変としてもよい。   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.

そして、画像表示装置１の画像を見ない時は、下方照明部４１のみの点灯、または下方照明部４１と側方照明部４２両方の点灯によって、（壁面照度／床面照度）を０．５未満としてリビング空間Ｌ全体を明るく照らすことができ、画像を見ない時にも適切な照明環境となる。   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.

一方、画像表示装置１の画像を見る時は、側方照明部４２のみの点灯、または下方照明部４１と側方照明部４２両方を調光制御することで、実施形態１，２と同様に（壁面照度／床面照度）を０．５以上とし、従来の照明環境に比べて高い臨場感を得ることができる。さらには、画像表示装置１前方に位置する画像観察者Ａの視線に光源や反射光が入らないようにしており、画像観察者Ａにグレアを感じさせないようにして、画像表示装置１後方の後壁Ｗ１を照らしている。したがって、グレアが無い状態で後壁Ｗ１を効率よく明るくして、（壁面輝度／表示面輝度）を０．１以上にすることができ、その結果、画像観察者Ａは、画像表示装置１の画像に対して、従来の照明環境に比べて高い視認性を得ることができ、見やすい画像となる。   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.

このように、本実施形態では、画像を見ない時にも適切な照明環境としながら、空間の臨場感と画像の見やすさとの両方を得ることができる。   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.

（実施形態４）
図８は本実施形態の照明器具４を示し、実施形態３とは側方照明部４２の構成が異なるもので、側方照明部４２は、環形の反射板４ｃ内に半周毎に互いに独立して調光可能な光源４ｇ，４ｈを設けている。一般的な画像観察状態を考えると、画像観察者Ａと画像表示装置１との間（中央に限らない）に照明器具４が設置される。よって、画像表示装置１の画像を見る時は、画像観察者Ａ方向への照明は不要であり、側方照明部４２は全周に亘って３６０°方向を照らす必要はない。したがって、側方照明部４２の光源４ｇを後壁Ｗ１側、光源４ｈを画像観察者Ａ側に向け、画像表示装置１の画像を見ない時は光源４ｇ，４ｈともに点灯させ、画像表示装置１の画像を見る時は光源４ｇを点灯させ且つ光源４ｈを消灯させることで、空間の臨場感をより向上させることができ、さらには省エネルギー化を実現することができる。 (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.

（実施形態５）
図９は本実施形態の照明器具４を示し、実施形態４の画像観察者Ａ側の光源４ｈを削除したもので、半環形の反射板４ｆ内に光源４ｇを設けている。したがって、実施形態４と同様に空間の臨場感の向上、省エネルギー化を実現できるとともに、実施形態４に比べて光源の調光制御ブロックを簡素化でき、コスト低減を実現できる。 (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.

本発明の実施形態１の照明システムの構成を示す側面図である。It is a side view which shows the structure of the illumination system of Embodiment 1 of this invention. 同上の照明器具の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of a lighting fixture same as the above. 本発明の実施形態２の照明システムの構成を示す側面図である。It is a side view which shows the structure of the illumination system of Embodiment 2 of this invention. 同上の照明器具の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of a lighting fixture same as the above. 同上の照明システムの参考例を示す側面図である。It is a side view which shows the reference example of an illumination system same as the above. 同上の照明器具の参考例を示す側面断面図である。It is side surface sectional drawing which shows the reference example of a lighting fixture same as the above. 本発明の実施形態３の照明器具の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the lighting fixture of Embodiment 3 of this invention. 本発明の実施形態４の照明器具の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the lighting fixture of Embodiment 4 of this invention. 本発明の実施形態５の照明器具の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the lighting fixture of Embodiment 5 of this invention. 本発明の実験環境を示す上面図である。It is a top view which shows the experimental environment of this invention. 同上を示す側面図である。It is a side view which shows the same as the above. 同上の照度測定位置を示す平面図である。It is a top view which shows the illumination intensity measurement position same as the above. 同上の空間の臨場感の実験結果を示す図である。It is a figure which shows the experimental result of the realistic sensation of the space same as the above. 同上の実験条件毎におけるグレア有無の分類結果を示す図である。It is a figure which shows the classification result of the presence or absence of glare for every experimental condition same as the above. 同上のグレア無し時における画像の見やすさの実験結果を示す図である。It is a figure which shows the experimental result of the visibility of an image when there is no glare same as the above. 同上のグレア有り時における画像の見やすさの実験結果を示す図である。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.

符号の説明Explanation of symbols

１ 画像表示装置
２ 照明器具
１００ ローボード
Ａ 画像観察者
Ｌ リビング空間
Ｆ 床面
Ｗ１ 後壁
Ｗ４ 天井面 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)

壁面の前方に設置された画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の第１の鉛直面照度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の第２の鉛直面照度との平均値で表される壁面照度を、画像表示装置と画像観察者の視点位置とを結ぶ空間の略中央に位置する床面の水平面照度で除した値が０．５以上となる照明器具を備えることを特徴とする照明システム。 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. 前記照明器具は、画像観察者の位置から画像表示装置を中心に略３０°の視野領域内において輝度１０００ｃｄ／ｍ２以上の領域を略０．００３％未満とし、画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の輝度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の輝度との平均値で表される壁面輝度を、画像表示装置の表示面の略中央の平均輝度で除した値を０．１以上とすることを特徴とする請求項１記載の照明システム。 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. 前記照明器具は前記床面の水平面照度を調整可能であり、前記壁面照度を前記床面の水平面照度で除した値が０．５未満から０．５以上の間で可変となることを特徴とする請求項１記載の照明システム。 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. 前記照明器具は、前記壁面の第１の鉛直面照度と、前記壁面の第２の鉛直面照度と、前記床面の水平面照度とを同時に調整可能であり、前記壁面照度を前記床面の水平面照度で除した値が０．５未満から０．５以上の間で可変となって、前記壁面照度を前記床面の水平面照度で除した値が０．５以上の時は、画像観察者の位置から画像表示装置を中心に略３０°の視野領域内において輝度１０００ｃｄ／ｍ２以上の領域が略０．００３％未満であり、画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の輝度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の輝度との平均値で表される壁面輝度を、画像表示装置の表示面の略中央の平均輝度で除した値が０．１以上となることを特徴とする請求項１記載の照明システム。 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. 壁面の前方に設置された画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の鉛直面照度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の鉛直面照度との平均値で表される壁面照度を、画像表示装置と画像観察者の視点位置とを結ぶ空間の略中央に位置する床面の水平面照度で除した値が０．５以上となるように調整することを特徴とする照明調整方法。 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. 画像観察者の位置から画像表示装置を中心に略３０°の視野領域内において輝度１０００ｃｄ／ｍ２以上の領域が略０．００３％未満であり、画像表示装置の表示面の左右側端部から左右方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の上下方向の中心高さに位置する前記壁面の輝度と、画像表示装置の表示面上端部から上方向に略３００ｍｍ離れ、且つ画像表示装置の表示面の左右方向の中心に位置する前記壁面の輝度との平均値で表される壁面輝度を、画像表示装置の表示面の略中央の平均輝度で除した値が０．１以上となるように調整することを特徴とする請求項５記載の照明調整方法。 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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JP2006337617A (en) * 2005-06-01 2006-12-14 Sharp Corp Display apparatus
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