JP2004004683A - Method for adjusting stereoscopic video display device and stereoscopic display system using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for adjusting an optical separating device for a stereoscopic video display device by which the relative position of an optical separating means to a display panel is easily adjusted. <P>SOLUTION: The method for adjusting the stereoscopic video display device is equipped with a liquid crystal display panel for displaying the video consisting of a plurality of visual points and the optical separating device for separating video light from the liquid crystal display panel as the video light from a pair of visual points corresponding to the right and left eyes. By displaying 1st and 2nd pictures on the liquid crystal display panel, an observer recognizes the state of the optical separating device from relation between the 1st and the 2nd specified pictures and interference fringe caused between the liquid crystal display panel and the optical separating device from a position at a distance of 1/2 of an optimum observation position, and adjusts the state of the optical separating device. <P>COPYRIGHT: (C)2004,JPO

Description

【００５０】
上記のような関係により、光学分離装置（パララックスバリア）２と液晶表示パネル１１との相対位置が合致すれば、干渉縞の色や模様も完全に一致する。この干渉縞等の一致を判断することで調整が容易に行える。この時、液晶表示パネル１１に表示させる画像を選べば、より調整が容易になる。以下に、その画像の例を挙げ説明する。
【００５１】
図８に示す例では、理解を容易にするために、液晶表示パネル１１の画面の幅を眼間距離（Ｅ）の４倍にして説明する。また、観察位置は最適観察位置（Ｄ）の１／２の距離である。他の例でも同じである。
【００５２】
この図８に示す例では、画像を色（柄）の異なる一様画像とし、縞を見ながら調整する。例えば、第１画像を右眼映像用画像とすれば、図８（ａ）でクロスハッチングを施して示すように、右眼用画像が表示される液晶表示パネルの当該画素に一様模様又は一色の色の映像が表示される。また、第２画像を左眼映像用画像とすれば、図８（ｂ）において点々で施して示すように、左眼用画像が表示される液晶表示パネルの当該画素に第１画像とは異なる一様模様又は一色の色の映像が表示される。
【００５３】
このような、第１、第２画像を液晶表示パネルに表示し、最適観察位置（Ｄ）の１／２の距離で観察することで、観察者の目には、干渉縞が観察され、その干渉縞を見ながら、光学分離装置（パララックスバリア）２を移動させて調整する。最適観察位置（Ｄ）の１／２の距離で位置あわせが完了すると、眼間距離Ｅの幅に相当する第１画像、第２画像の干渉縞が観察できる。この結果を得るように調整することで、簡単に調整が行える。この調整において、一方の画像を黒、他方の画像を白にすると、干渉縞が最も濃くなり、調整し易い。
【００５４】
図９に示す例は、どの様に位置ずれが発生しているかを容易に判断できるような画像を表示したものである。このため、少なくとも一方の画像に、縞の状態が確認できる画像を付加している。この図９の例では、図９（ｂ）に示すように、第２画像に縞の状態が確認できる画像を付加している。第２画像の上下端部にそれぞれ眼間距離Ｅを隔てて第１画像の画像を付加している。
【００５５】
このような第１画像、第２画像を液晶表示パネルに表示し、最適観察位置（Ｄ）の１／２の距離で観察すると、液晶表示パネルと光学分離装置（パララックスバリア）２との相対位置に回転ずれが発生していると、図９（ｃ）に示すように、縞が斜めになった状態で観察される。このように観察した場合には、回転調整を行い縞が真っ直ぐな状態になるように調整を行う。
【００５６】
液晶表示パネルと光学分離装置（パララックスバリア）２との相対位置に水平の位置ずれが発生していると、図９（ｄ）に示すように、第２の画像の付加した画像が一部だけ観察される。このように観察した場合には、光学分離装置（パララックスバリア）２を水平移動させ、付加した画像が見えなくなるまで調整を行う。
【００５７】
また、逆視状態で水平の位置ずれが発生していると、図９（ｅ）に示すように、第２の画像の付加した画像が完全に観察される。このように観察した場合には、適視距離では逆視状態であると判断できる。このような場合には、液晶表示パネルに表示する左右の画像を入れ替えることでも対応できるが、画像を入れ替えない場合には、光学分離装置（パララックスバリア）２を水平移動させ、付加した画像が見えなくなるまで調整を行う。画像入れ替えなどの表示による調整が不要なので、ユーザの負担が減少する。そして、位置合わせが完了すると、図９（ｆ）に示す画像が観察される。図９（ｆ）に示す状態になれば、適視距離で正視状態で位置合わせが完了したことになる。
【００５８】
図１０に他の調整画像の例を示す。図１０に示すものは、画像を、同じ色（柄）で配置が逆の帯状画像とし、全面が一様になるように位置合わせする。帯は中央が境界となるように描画する。図１０（ａ）、図１０（ｂ）に示すように、両者の画像は中央を境界として、逆のパターンである。尚、帯の幅は、必ずしも眼間距離Ｅと一致する必要はない。また、少なくとも一方の画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。この図１０の例では両方の画像に付加している。）
【００５９】
このような第１画像、第２画像を液晶表示パネルに表示し、最適観察位置（Ｄ）の１／２の距離で観察すると、位置合わせが完了すると、図１０（ｃ）に示すように、一様な画面になる。
【００６０】
図１１に更に他の調整画像の例を示す。図１１に示すものは、同図（ａ）、（ｂ）に示すように、画像を、同じ色（柄）の下地で異なる色（柄）の帯状画像とする。そして、同図（ｃ）に示すように、同じ色（柄）のみが見えて全面が一様になるように位置合わせする。
【００６１】
尚、図示はしないが、少なくとも一方の画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。
【００６２】
このような第１画像、第２画像を液晶表示パネルに表示し、最適観察位置（Ｄ）の１／２の距離で観察すると、位置合わせが完了すると、図１１（ｃ）に示すように、一様な画面になる。
【００６３】
図１２に更に他の調整画像の例を示す。図１２に示すものは、同図（ａ）、（ｂ）に示すように、画像を、同じ色（柄）の下地で異なる色（柄）の帯状画像とする。そして、同図（ｃ）に示すように、異なる色（柄）による縞模様になるように位置合わせする。
【００６４】
尚、少なくとも一方の画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。この図１２の例では、両方の画像に付加している。
【００６５】
図１３に更に異なる調整画像の例を示す。この図１３に示すものは、画像の一部領域の輝度を低くし、観察者の両眼を映して正面位置を確認し易くしたものである。
【００６６】
次に多眼式の例につき説明する。多眼式の場合も同様で、表示装置の真正面にいずれかの視点のペアが位置するように微調整する。ペアが正しくない場合は、各画像の表示画素を変更することで変換できる。図１４は、水平４眼式における最適観察距離での映像の見え方を示す模式図である。
【００６７】
液晶表示パネル１１に視点１，２，３，４の映像が順次表示される。この液晶表示パネル１１の観察者側に距離Ｇだけ離れてパララックスバリア基板２１が配置される。パララックスバリア基板２１には、ストライプ状の遮光薄膜２１ａが設けられている。遮光膜２１ａ、２１ａ間の開口部２１ｂを通過した一対のペアの映像光を観察者が観察する。
【００６８】
図１５に示すＪを２以上の整数とすると、最適観察距離の１／Ｊの距離（Ｄ／Ｊ）では、開口部を通して左右の眼が見る点の間隔がＰの整数倍（ＪＰ）になる。このように、多眼式でも２眼式と同様の議論がなりたち、Ｄ／Ｊの距離で干渉縞の明暗が重なる。このことから前述した２眼式の場合と同様に、画像を観察することにより光学分離装置（パララックスバリア）２の調整が行える。
【００６９】
図１６に表示させる画像の例を示す。理解を容易にするために、液晶表示パネル１１の画面の幅を眼間距離（Ｅ）の４倍にして説明する。また、観察位置は最適観察位置（Ｄ）の１／２の距離である。他の例でも同じである。図１６（ａ）に示すように、全ての視点用に異なる画像を表示する。このように表示すると、（ｂ）に示すように、Ｄ／２の距離で左右の眼に異なる画像が見えて調整しにくい。そこで、表示させる画像を調整しやすい画像にする。
【００７０】
図１７に水平４眼式の調整画像の例を示す。図１７（ａ）に示すように、正面に対応する１視点用にのみ異なる画像を表示し、他は同じ画像を表示する。このような画像を表示すると、調整完了時には図１７（ｂ）に示すように、干渉縞が濃くなる、あるいは色や模様が付くため分かりやすくなる。調整は、片眼の画像により調整ができる。
【００７１】
尚、少なくとも一つの画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。図１７の例では、全ての画像に付加している。
【００７２】
図１８に水平４眼式の調整画像の他の例を示す。図１８（ａ）に示すように、正面に対応する１視点用にのみ帯状の画像を表示し、他は同じ画像を表示する。このような画像を表示すると、調整完了時には図１８（ｂ）に示すように、片眼の画像のみ帯状画像が見える。片眼の画像にのみ帯状の画像が見えるように調整する。
【００７３】
尚、少なくとも一つの画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。図１８の例では、全ての画像に付加している。
【００７４】
図１９に水平４眼式の調整画像の更に他の例を示す。図１９（ａ）に示すように、偶数視点と奇数視点にグループ分けし、それぞれに同じ画像を表示する。調整完了時には図１９（ｂ）に示すように、Ｄ／２の距離で左右の眼に同じ画像が見える。この例では、両眼での調整ができる。
【００７５】
尚、少なくとも一つの画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。図１９では全ての画像に付加している。
【００７６】
また、正面に対応する視点用の画像に印（図１９では●）を付加すると、視点と画像の対応も正しく調整できる。
【００７７】
図２０に水平４眼式の調整画像の異なる例を示す。図２０の例では、偶数視点と奇数視点にグループ分けし、それぞれに帯状画像にしたものである。調整完了時には図２０（ｂ）に示すように、Ｄ／２の距離で左右の眼に同じ画像が見える。この例では、両眼での調整ができる。
【００７８】
尚、少なくとも一つの画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。図２０では全ての画像に付加している。
【００７９】
また、正面に対応する視点用の画像に印（図２０では●）を付加すると、視点と画像の対応も正しく調整できる。
【００８０】
図２１に水平４眼式の調整画像の更に異なる例を示す。図２１の例では、偶数視点と奇数視点にグループ分けし、それぞれに同じ模様の帯状画像にしたものである。調整完了時には図２１（ｂ）に示すように、Ｄ／２の距離で左右の眼に同じ画像が見える。この例では、両眼での調整ができる。
【００８１】
尚、少なくとも一つの画像に、縞の状態が確認できる画像を付加しておくと調整がし易い。
【００８２】
また、正面に対応する視点用の画像に印（図２１では●）を付加すると、視点と画像の対応も正しく調整できる。
【００８３】
次に、垂直方向にも複数の視点を有する場合の調整につき図２２に従い説明する。
【００８４】
水平方向に関しては水平のみの多眼式と同じ考え方で調整が可能である。回転調整については、水平方向と垂直方向の一方の軸で調整すれば他方の軸についても自動的に調整される。水平方向で調整する場合は、垂直方向には同じ画像を表示してもよい。
【００８５】
図２２（ａ）に示す画像を与えれば、Ｄ／２の距離では、左右の眼に図２２（ｂ）に示す映像が観察される。
【００８６】
各視点用の画像は、方形画像や垂直方向の帯状画像でもよい。また、正面に対応する視点用の画像に印（図では●）を付加すると、視点と画像の対応も正しく調整できる。
【００８７】
尚、水平７眼式のように、厳密に正面に対応する２視点がない場合は、例えば中央近傍の２視点である４と５を選択すればよい。
【００８８】
上記した実施形態は、光学分離装置として、パララックスバリア方式を用いたものを説明したが、レンチキュラレンズ方式やマイクロポールを用いた偏光メガネ方式など、モアレを発生させることができるいずれの方式においても同様の手法で調整が可能である。パララックスバリア、レンチキュラレンズ、ピンホールなどを斜めに配置するような方式においても、調整時の観察位置を考慮した適切な画像を適切に合成した画像により調整が可能である。
【００８９】
次に、ピンホールを斜めに配置したパララックスバリアを用いた場合につき説明する。図２３乃至図２６に、視点数が４で、ピンホールを斜めに配置したパララックスバリアを用いた場合につき説明する。図２３は、液晶表示画面に表示される画素の関係を示す模式図、図２４は、この表示画面に対応するパララックスバリアを示す模式図である。
【００９０】
図２３に示すように、左右方向、上下方向共に”４””３””２””１”の順序で繰り返して４つの視点に対応する画像が合成されて表示される。この表示画面に対応して、図２４に示すように、パララックスバリアは、階段状にピンホール２０ａが形成された斜めストライプ状のバリア部２１ａが設けられている。このパララックスバリアを用いると、図２５、図２６に示すように、左右の眼に隣接する視点の画像が分離されて与えられる。図２５は、適視距離において、左眼で図２３に示す表示画面を見た状態を、図２６は、適視距離において、右眼で図２３に示した表示画面を見た状態を示す模式図である。
【００９１】
表示画面とパララックスバリア基板の位置関係を調整すると、図２５、図２６に示すように、この例では、左右の眼に２、３の視点からの映像が観察される。
【００９２】
さて、このように構成されたピンホールを斜めに配置したパララックスバリアを用いた場合の調整方法につき説明する。適視距離においては、上記した図２５、図２６に示すように、左右の眼にそれぞれ１つの視点、この例では２、３の視点からの画像を観察することができる。しかし、適視位置より近くから観察すると、異なる視点からの画像を観察することになる。図２７及び図２８にパララックスバリアと表示パネルとの位置調整が終了した時の表示装置において、適視距離の半分の距離で観察した様子を示す。図２７は、適視距離の半分の距離において、左眼で図２３に示す表示画面を見た状態を、図２８は、適視距離の半分の距離において、右眼で図２３に示した表示画面を見た状態を示す模式図である。
【００９３】
左右の眼の正面付近は、眼とピンホールと画素との位置関係がほとんど変わらないので、適視距離と同じ視点の画像が見える。しかし、その他の領域は、眼とピンホールと画素との位置関係が変わるため、異なる視点の画像が見える。図２９は、左右の眼に大まかにどの視点の画像が見えているかを示す模式図であり、図２９（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。このように、左右の眼には複数の視点、この実施形態では４つの視点の画像が観察される。図３０は、各画像の中で左右の眼が実際に見ている領域を示す、（ａ）は視点１の画像において左右の眼が実際に見ている領域、（ｂ）は視点２の画像において左右の眼が実際に見ている領域、（ｃ）は視点３の画像において左右の眼が実際に見ている領域、（ｄ）は視点４の画像において左右の眼が実際に見ている領域を示している。
【００９４】
調整画像を作る際には、図２９及び図３０を参考にし、図３１の（ａ）から（ｄ）に示すように、各領域の色や表示する文字などを決めればよい。この図３１において、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。この例では、左右眼に同じ色（図中括弧内の色）の模様を見せ、かつ、それぞれの眼の正面にだけ文字（Ｌ），（Ｒ）を見せるような画像を作成している。
【００９５】
このような画像を形成することで、図３２に示すように、左右の眼に赤と青の同じ縞模様が見える。図３２において、（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。なお、色の書いていない部分の色はどのような色でも良い。
【００９６】
ここで、文字を省略すると、画像１と３、画像２と４の区別がなくなるので、調整画像としては不十分である。逆に色を省略し、文字のみの場合は調整画像として効果がある。この場合は全画像の背景色が白などで統一されるが、薄く明暗のモアレは見えるので、これを見ながら回転方向の調整を行い、文字の見え方で水平方向の調整を行なえばよい。
【００９７】
次に、具体的な調整画像の例を図３３に示す。図３３において、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。モアレを見ている状態では、画像の境界付近は２つの視点画像が混ざる領域となる。ここでは、この画像の境界となる上下の部分に、縞の状態が確認できる画像として黒い帯の画像を付加している。この黒い帯の中に描かれた全画像に共通の画像が、モアレを合わせる目標となる。これにより調整完了時の見え方が、図３４のように上下に同じ色もしくは模様となる。なお、垂直画素ピッチが水平画素ピッチのｎ倍の時、水平モアレピッチは眼間距離に等しく、垂直モアレピッチは眼間距離のｎ倍となる。例えば、カラー画像の場合には、垂直画素ピッチが３倍となる。
【００９８】
図３５は、更に他の具体的な調整画像の例を示し、画像に「Ｌ」及び「Ｒ」の文字を入れる例を示している。図３５において、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。この図３５に示す調整画像を用いると、調整完了時には、図３６（ａ）（ｂ）に示すように画像が観察できる。図３６において、（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。、右眼では「Ｒ」が、左眼では「Ｌ」が見える。なお、調整においては中央付近のモアレのみが見えればよいので、ここでは不要な領域を一定の色や模様としている。
【００９９】
図３７は、更に異なる具体的な調整画像の例を示し、左右の眼で見える文字や画像が、両方で意味をもつように作られている。図３７において、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。この図３６に示す調整画像を用いると、図３７に示すように、左右の眼で見た状態で、意味のある言葉や顔の画像となっている。
【０１００】
図示しないが、全画像に共通の固定パターンに、最終的にどのような文字、言葉、図などが見えるべきかを示してもよい。
【０１０１】
次に、より視点数が多い場合について説明する。なお、ここでは水平方向のモアレのみを説明する。図３９は、パララックスバリア２１のある開口部と８つの異なる視点に対応する画素との関係を示す模式図である。この図３９の例では、適視距離では右眼が「５」、左眼が「４」を観察する状態である。そして、調整完了時においてモアレを見る距離では、左右の眼に見える画像は図４０のようになる。図４０において、（ａ）は左眼に見える画像、（ｂ）は右眼に見える画像を示している。この図４０から分かるように、右眼の正面は「５」で左眼の正面は「４」となっている。この状態でバリアが左にずれると、適視距離では右眼が「６」、左眼が「５」を見る状態となるので、モアレを見る距離では図４１（ａ）のようになる。逆にバリアが右にずれると、適視距離では右眼が「４」、左眼が「３」を見る状態となるので、モアレを見る距離では図４１（ｂ）のようになる。
【０１０２】
図４２は、このような場合の各視点の調整画像の例である。（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域、（ｅ）は視点５の画像において左右の眼が見ている領域、（ｆ）は視点６の画像において左右の眼が見ている領域、（ｇ）は視点７の画像において左右の眼が見ている領域、（ｈ）は視点８の画像において左右の眼が見ている領域を示す。
【０１０３】
調整完了時には、図４３に示すのように矢印は見えないが、バリアが左右にずれた状態では、図４４（ａ）、（ｂ）のように調整の方向を示す矢印が右眼もしくは左眼に見える。視点数が多いと水平方向の調整範囲が広くなるので、このような手法で正しい位置が近づいていることを示すことができる。なお、ここでは調整の方向はバリアを移動すべき方向としているが、モアレが移動すべき方向としてもよい。図４０、図４１からバリアの移動と画像の移動、つまりモアレの移動は逆であることがわかる。
【０１０４】
視点が多い場合は、必ずしも正面の画像が正確に合っている必要はない。そこで、中心付近の視点の画像を他と異なる画像とするだけでも調整は可能である。図４５の例では、視点３〜６の画像に白帯を表示し、正面で画面中央付近に白い筋が見えるように調整する。
【０１０５】
尚、図４５において、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域、（ｅ）は視点５の画像において左右の眼が見ている領域、（ｆ）は視点６の画像において左右の眼が見ている領域、（ｇ）は視点７の画像において左右の眼が見ている領域、（ｈ）は視点８の画像において左右の眼が見ている領域を示す。
【０１０６】
以上の例で、視点数が奇数、例えば７の場合は両端の画像画像１もしくは画像８を省けばよいし、図４５の例では画像３〜６のうちのひとつを省いて白帯を表示する画像を３つにしても良い。
【０１０７】
また、矢印は垂直方向の調整にも使用でき、見える矢印の関係から回転方向の調整も行うことができる。
【０１０８】
また、各領域の色、模様、文字や画像、矢印を表示する位置などは以上の例と同じである必要はない。
【０１０９】
また、バリアは以上の例とは異なるものでもよく、例えば、図４６のような形状のもが考えられる。
【０１１０】
尚、上記実施形態においては、画面幅を全て眼間距離の４倍として説明したが、これに限定されるものではない。
【０１１１】
また、モアレを観察する距離を適視距離の１／２として説明したが、１／３などの場合も同様の手法で調整画像が作成できる。
【０１１２】
次に、これらの調整をソフトウェアで指示しながら対話形式に行う例につき説明する。図４７は、液晶ディスプレイ装置１に表示される画像の例を示す模式図であり、画像には調整のためのつまみを矢印で示し、調整が完了した時の見え方を表示している。このような画像を調整の各段階で表示して調整する。
【０１１３】
この調整方法が適用される立体映像表示システム構成を図４８に示す。図４８は立体映像表示装置のシステム構成を示すブロック図であり、ディスプレイ１００には上記した映像分離装置２が装着されている。ディスプレイ装置１００には、液晶表示パネルを備える。この液晶表示パネルには、図２３に示すように複数の視点からの画像が表示される。映像処理回路１０２は、画像メモリ１０５に一旦保持された複数の視点の画像データを取り込み、処置の信号処理を施し、映像ドライブ回路１０１に与える。映像ドライブ回路１０１は、与えられた画像信号に基づきドライバを駆動し、ディスプレイ装置１００に所定の画像を表示させる。コントローラ１０３はマイクロコンピュータにより構成され、プログラムメモリ１０４に格納されたプログラムに基づき各ブロックを制御する。このプログラムメモリ１０４には、各種動作を制御するプログラムの他、この実施形態においては、後述する画像調整用プログラムが格納され、画像調整動作をユーザに対して対話式に動作を行えるように制御する。
【０１１４】
この画像調整用プログラムは、例えば、ＣＤ−ＲＯＭなどに格納され、このＲＯＭからシステムにインストールすることにより利用される。立体画像データはインターフェース１０６を介して画像メモリ１０５に取り込まれる。
【０１１５】
このようなシステムにおいて、位置調整をソフトウェアで指示しながら対話形式に行う手順につき、図４９、図５０のフローチャート並びに図５１から図５７に示す表示画面の例に参照して説明する。
【０１１６】
位置調整動作を開始させると、ディスプレイ装置１００に図５１に示すような調整初期画面を表示させる（ステップＳ１）。初期調整画面は、調整に必要なつまみを矢印で示し、回転調整が完了した時の見え方を表示する。続いて、調整完了動作をユーザが行うか否か待機する（ステップＳ２）。ユーザは調整が終了するとリターンキーや調整完了ボタンをマウスなどのポインティングデバイスを用いて指示すると動作が終了する。調整完了動作が行われない場合には、調整方法の指示があるまで待機し（ステップＳ３）、調整方法が指示されると次の調整画面である高さ調整の指示の画面をディスプレイ装置１００に表示させる（ステップＳ４）。ディスプレイ装置１００には、図５２に示す表示がなされる。
【０１１７】
ユーザはディスプレイ装置１００に表示された指示に従い、映像分離装置２を構成するフィルタキットの背面が液晶表示画面に密着する高さに調整して取り付ける。続いて、次入力されるまで待機し（ステップＳ５）、次の指示動作が行われると、次に進むという指示か否か判断される（ステップＳ６）。指示が次に進むでない場合にはステップＳ７へ進み、次に進むの場合にはステップＳ８に進む。ステップＳ７においては、戻るという指示か否か判断され、戻るという指示であれば、ステップＳ１に戻り、初期画面に戻る。戻るでない場合には、この実施形態では完了（ＯＫ）を指示したと判断し、動作が終了する。
【０１１８】
ステップＳ８においては、次の調整画面である観察位置調整の指示の画面をディスプレイ装置１００に表示させる。ディスプレイ装置１００には、図５３に示す表示がなされる。図５３の表示に従いユーザが観察位置を調整すると、次入力されるまで待機し（ステップＳ９）、次の指示動作が行われると、次に進むという指示か否か判断される（ステップＳ１０）。指示が次に進むでない場合にはステップＳ１１へ進み、次に進むの場合にはステップＳ１２に進む。ステップＳ１１においては、戻るという指示か否か判断され、戻るという指示であれば、ステップＳ４に戻り、高さ調整の画面に戻る。戻るでない場合には、この実施形態では完了（ＯＫ）を指示したと判断し、動作が終了する。
【０１１９】
ステップＳ１２においては、次の調整画面である斜め調整の指示の画面をディスプレイ装置１００に表示させる。ディスプレイ装置１００には、図５４に示す表示がなされる。図５４の表示に従いユーザが斜め調整つまみを回して斜め位置の観察位置を調整すると、次入力されるまで待機し（ステップＳ１３）、次の指示動作が行われると、次に進むという指示か否か判断される（ステップＳ１４）。指示が次に進むでない場合にはステップＳ１５へ進み、次に進むの場合にはステップＳ１６に進む。ステップＳ１５においては、戻るという指示か否か判断され、戻るという指示であれば、ステップＳ８に戻り、観察位置調整の画面に戻る。戻るでない場合には、この実施形態では完了（ＯＫ）を指示したと判断し、動作が終了する。
【０１２０】
ステップＳ１６においては、次の調整画面である観察位置調整の指示の画面をディスプレイ装置１００に表示させる。ディスプレイ装置１００には、図５５に示す表示がなされる。図５５の表示に従いユーザが画面の中央に観察位置を調整すると、次入力されるまで待機し（ステップＳ１７）、次の指示動作が行われると、次に進むという指示か否か判断される（ステップＳ１８）。指示が次に進むでない場合にはステップＳ１９へ進み、次に進むの場合にはステップＳ２０に進む。ステップＳ１９においては、戻るという指示か否か判断され、戻るという指示であれば、ステップＳ１２に戻り、斜め調整の画面に戻る。戻るでない場合には、この実施形態では完了（ＯＫ）を指示したと判断し、動作が終了する。
【０１２１】
ステップＳ２０においては、次の調整画面である水平位置調整の指示の画面をディスプレイ装置１００に表示させる。ディスプレイ装置１００には、図５６に示す表示がなされる。図５６の表示に従いユーザが水平移動調整つまみを用いて水平位置を調整すると、次入力されるまで待機し（ステップＳ２１）、次の指示動作が行われると、次に進むという指示か否か判断される（ステップＳ２２）。指示が次に進むでない場合にはステップＳ２３へ進み、次に進むの場合にはステップＳ２４に進む。ステップＳ２３においては、戻るという指示か否か判断され、戻るという指示であれば、ステップＳ１６に戻り、観察調整の画面に戻る。戻るでない場合には、この実施形態では完了（ＯＫ）を指示したと判断し、動作が終了する。そして、ステップＳ２４においては、ディスプレイ装置１００に位置調整が完了したことを表す画像を表示し、ユーザに確認を促す。ユーザは調整が終了するとリターンキーや図示していないＯＫボタンを押す。という具合である。このようにして調整が容易に行える。
【０１２２】
また、上記した実施形態は、光学分離装置が着脱自在のものに適用する場合につき説明したが、光学分離装置を位置調整後、表示パネルに固定する立体映像表示装置にも後調整や画像調整に適用できることは言うまでもない。
【０１２３】
また、上記した実施形態においては、映像表示装置として、液晶表示ディスプレイ装置を用いたが、他の表示装置、例えばプラズマディスプレイ、リアプロジェクション装置、有機ＥＬ発光デバイスを用いた装置などを用いることもできる。
【０１２４】
【発明の効果】
以上、説明したように、この発明によれば、左右の眼に見える干渉縞の明暗の位置が完全に一致し、違和感がなくなり、その画像を観察することにより光学分離装置の調整を容易に行える。また、適視距離より近い距離で調整を行うことができるので、適視距離が遠い立体表示装置であっても調整時には光学分離装置に手が届き、調整画像を見ながら容易に調整を行える。
【０１２５】
【図面の簡単な説明】
【図１】
この発明が適用される液晶ディスプレイ装置を示す正面図である。
【図２】
この発明が適用して好適な光学分離装置を示す正面図である。
【図３】
この光学分離装置を液晶ディスプレイ装置に取り付ける状態を示す正面図である。
【図４】
この光学分離装置を液晶ディスプレイ装置に取り付けた状態を示す正面図である。
【図５】
この光学分離装置を液晶ディスプレイ装置に取り付けた状態を示す側面図である。
【図６】
２眼式立体映像表示装置における最適観察距離での映像の見え方を示す模式図である。
【図７】
この発明における調整時の観察距離での映像の見え方を示す模式図である。
【図８】
この発明における調整画像の例を示す図である。
【図９】
この発明における調整画像の例を示す図である。
【図１０】
この発明における他の調整画像の例を示す図である。
【図１１】
この発明における更に他の調整画像の例を示す図である。
【図１２】
この発明における異なる調整画像の例を示す図である。
【図１３】
この発明における更に異なる調整画像の例を示す図である。
【図１４】
水平４眼式立体映像表示装置における最適観察距離での映像の見え方を示す模式図である。
【図１５】
水平４眼式立体映像表示装置における調整時の観察距離での映像の見え方を示す模式図である。
【図１６】
水平４眼式立体映像表示装置での表示画像を示す図である。
【図１７】
この発明における水平４眼式立体映像表示装置での調整画像の例を示す図である。
【図１８】
この発明における水平４眼式立体映像表示装置での他の調整画像の例を示す図である。
【図１９】
この発明における水平４眼式立体映像表示装置での更に他の調整画像の例を示す図である。
【図２０】
この発明における水平４眼式立体映像表示装置での異なる調整画像の例を示す図である。
【図２１】
この発明における水平４眼式立体映像表示装置での更に異なる調整画像の例を示す図である。
【図２２】
垂直にも複数の視点を有する立体映像表示装置での調整画像を示す図である。
【図２３】
斜めバリアを用いたときの液晶表示画面に表示される画素の関係を示す模式図である。
【図２４】
図２３の表示画面に対応するパララックスバリアを示す模式図である。
【図２５】
適視距離において、左眼で図２３に示す表示画面を見た状態を示す模式図である。
【図２６】
適視距離において、右眼で図２３に示した表示画面を見た状態を示す模式図である。
【図２７】
適視距離の半分の距離において、左眼で図２３に示す表示画面を見た状態を示す模式図である。
【図２８】
適視距離の半分の距離において、右眼で図２３に示した表示画面を見た状態を示す模式図である。
【図２９】
左右の眼に大まかにどの視点の画像が見えているかを示す模式図であり、（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。
【図３０】
各画像の中で左右の眼が実際に見ている領域を示す模式図であり、（ａ）は視点１の画像において左右の眼が実際に見ている領域、（ｂ）は視点２の画像において左右の眼が実際に見ている領域、（ｃ）は視点３の画像において左右の眼が実際に見ている領域、（ｄ）は視点４の画像において左右の眼が実際に見ている領域を示す。
【図３１】
調整画像の一例を示す模式図であり、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。
【図３２】
図３１に示す調整画像を観察した状態を示す模式図であり、（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。
【図３３】
調整画像の他の例を示す模式図であり、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。
【図３４】
図３３に示す調整画像を観察した状態を示す模式図であり、（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。
【図３５】
調整画像の更に他の例を示す模式図であり、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。
【図３６】
図３５に示す調整画像を観察した状態を示す模式図であり、（ａ）は、左眼に見える画像、同（ｂ）は右眼に見える画像をそれぞれ示す。
【図３７】
調整画像の異なる例を示す模式図であり、（ａ）は視点１の画像において左右の眼が見ている領域、（ｂ）は視点２の画像において左右の眼が見ている領域、（ｃ）は視点３の画像において左右の眼が見ている領域、（ｄ）は視点４の画像において左右の眼が見ている領域を示す。
【図３８】
図３１に示す調整画像を観察した状態を示す模式図である。
【図３９】
パララックスバリアのある開口部と８つの異なる視点に対応する画素との関係を示す模式図である。
【図４０】
調整完了時においてモアレを見る距離で見える画像を示す模式図であり、（ａ）は左眼に見える画像、（ｂ）は右眼に見える画像を示している。
【図４１】
モアレを見る距離でバリアずれた状態を示す模式図であり、（ａ）は左にずれるた場合、（ｂ）は右にずれた状態を示す。
【図４２】
調整画像の一例を示す模式図である。
【図４３】
図４２に示す調整画像を観察した状態を示す模式図である。
【図４４】
図４２に示す調整画像でバリアがずれている場合を示す模式図であり、（ａ）はバリアが左にずれている場合、（ｂ）は右にずれている場合を示す。
【０００１】
図４２は、このような場合の各視点の調整画像の例である。
【図４５】
調整画像の一例を示す模式図である。
【図４６】
パララックスバリアの例を示す平面図である。
【図４７】
液晶ディスプレイ装置に表示される画像の例を示す模式図である。
【図４８】
この発明の立体映像表示システムの構成を示すブロック図である。
【図４９】
この発明の立体映像表示システムの調整画像の制御動作を示すフロー図である。
【図５０】
この発明の立体映像表示システムの調整画像の制御動作を示すフロー図である。
【図５１】
この発明の立体映像表示システムの調整画像を示す模式図である。
【図５２】
この発明の立体映像表示システムの調整画像を示す模式図である。
【図５３】
この発明の立体映像表示システムの調整画像を示す模式図である。
【図５４】
この発明の立体映像表示システムの調整画像を示す模式図である。
【図５５】
この発明の立体映像表示システムの調整画像を示す模式図である。
【図５６】
この発明の立体映像表示システムの調整画像を示す模式図である。
【図５７】
この発明の立体映像表示システムの調整画像を示す模式図である。
【符号の説明】
１　液晶ディスプレイ装置
１１　液晶パネル
２　光学分離装置
２１　パララックスバリア基板[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for adjusting an optical separation device of a stereoscopic image display device.
[0002]
[Prior art]
2. Description of the Related Art In recent years, in the field of electronic display devices, technology has been remarkably developed, and display screens have been increased in size and definition. As the display screen is enlarged and the definition is increased, the ratio of the image to the human visual field on the display screen is increased, and pixels can be arranged with a high density that cannot be determined by the resolution of human eyes. As a result, the image becomes natural, close to the real thing, and produces high realism. However, such an image is two-dimensional, whereas an actual object is three-dimensional. Therefore, there is a limit to a two-dimensional image in order to obtain a natural image with a more realistic feeling.
[0003]
By the way, a human can see an object three-dimensionally by the action of the two eyes. Therefore, if an object can be displayed in three dimensions, a higher sense of realism will be created. Therefore, in recent years, studies on three-dimensional display of objects have been actively conducted.
[0004]
Conventionally, various stereoscopic video display devices have been proposed, and among them, a device using an optical separation unit such as a lenticular lens or a parallax barrier is known as a device for displaying a stereoscopic video without special glasses. I have. Japanese Patent Application Laid-Open No. 10-268232 proposes a stereoscopic image display device including a backlight, a liquid crystal display panel as a display panel, and a parallax barrier disposed on the viewer side of the liquid crystal display panel. ing.
[0005]
[Problems to be solved by the invention]
In a conventional stereoscopic image display device, optical separation means such as a parallax barrier is attached after adjusting the relative position with respect to the display panel. If these relative positions are deviated, there arises a problem that stereoscopic vision cannot be obtained, and that left and right images are mixed and interference fringes are observed. For this reason, in the conventional three-dimensional image display device, after the relative position between the optical separation means and the display panel is accurately adjusted, and after the attachment, the removal is not usually performed. That is, the display panel of the conventional stereoscopic video display device is prepared exclusively for stereoscopic video.
[0006]
In addition, the above-mentioned adjustment work is also troublesome, and at present, it is difficult to make adjustments without experience.
[0007]
On the other hand, recently, liquid crystal display devices and notebook personal computers have been remarkably popularized, and it is desired that these devices can easily observe a stereoscopic image. When attaching an optical separation means to these devices, it is desired that the above-described position adjustment can be easily performed.
[0008]
Therefore, an object of the present invention is to provide a method of adjusting an optical separation device of a stereoscopic video display device, which can easily adjust a relative position between an optical separation unit and a display panel.
[0009]
[Means for Solving the Problems]
The method of adjusting a three-dimensional image display device according to the present invention includes: an image display unit that displays an image composed of a plurality of viewpoints; and an image light from the image display unit that is separated as image light from a pair of viewpoints corresponding to the left and right eyes. Optical display means, and a predetermined image is displayed on the video display means, and a predetermined image is generated between the video display means and the optical separation means from a position different from the optimal observation position by the observer. It is characterized in that the state of the optical separation means is recognized from the relationship with the interference fringes to be made, and the state of the optical separation means is adjusted.
[0010]
In addition, the position of the observer is in front of the stereoscopic video display device, and may be a position at a distance of a half of the optimal observation distance, and may be at a position of a half of the distance.
[0011]
With the above configuration, the light and dark positions of the interference fringes seen by the left and right eyes completely match, and the sense of discomfort is eliminated. By observing the image, the adjustment of the optical separation device can be easily performed.
[0012]
Further, the predetermined image may be a band-shaped image, a uniform image, or a combination thereof. It is preferable that the band-shaped image is drawn at a cycle that is an integral multiple of the cycle of the interference fringes generated at the position of the observer. Further, the band-shaped image may be an image having a width equal to an interval between interference fringes generated at a position of an observer.
[0013]
With the configuration described above, the adjustment images can be easily distinguished, and adjustment can be easily performed.
[0014]
Further, an image for confirming the state of the interference fringes may be added to the predetermined image, and the image for confirming the state of the interference fringes may be an image representing how the interference fringes appear when the adjustment is completed.
[0015]
With the above configuration, the state of displacement can be clearly grasped, and adjustment can be easily performed.
[0016]
Further, it is preferable that the predetermined image has a low-luminance area within a range where the position of the observer reflected on the stereoscopic video display device can be recognized.
[0017]
With the above configuration, it is easy to confirm the position where the observer stands.
[0018]
The predetermined image may be composed of characters, arrows, graphics, or a combination thereof.
[0019]
The arrow can be configured to be invisible when the adjustment is completed, and to indicate the direction in which the optical separation unit should be moved in other states.
[0020]
Further, the arrow may be configured to be invisible when adjustment is completed, and to indicate a direction in which the moiré should be moved in other states.
[0021]
In addition, the character or graphic can be configured to be a meaningful word or graphic when viewed with the left and right eyes when the adjustment is completed.
The method for adjusting a three-dimensional image display device according to claim 10, wherein:
[0022]
Further, an image for confirming the state of interference fringes may be added to an area where a plurality of viewpoint images can be seen when adjustment is completed.
[0023]
With the configuration described above, the adjustment images can be easily distinguished, and adjustment can be easily performed.
[0024]
Further, the present invention is a video display means for displaying an image composed of a plurality of viewpoints, an optical separation means for separating the video light from the video display means as video light from a pair of viewpoints corresponding to the left and right eyes, Control means for controlling the image display means to display a predetermined image, and means for determining an instruction of the observer, wherein the control means adjusts the position of the observer at a position different from the optimal observation position. A predetermined image that can be determined is displayed on the image display means, and the state of the optical separation means is recognized based on the relationship between interference fringes generated between the image display means and the optical separation means to assist in adjusting the state of the optical separation means. It is characterized by doing.
[0025]
The position of a knob for adjustment may be indicated on the predetermined image by an arrow. Further, it is possible to display the appearance of the predetermined image when the adjustment is completed.
[0026]
With the configuration described above, it is possible to provide a stereoscopic image display system that can be easily adjusted.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a liquid crystal display device to which the present invention is applied, FIG. 2 is a front view showing an optical separation device suitable for applying the present invention, and FIG. FIG. 4 is a front view showing a state in which the optical separation device is attached to a liquid crystal display device, and FIG. 5 is a side view showing a state in which the optical separation device is attached to a liquid crystal display device. is there.
[0028]
As shown in FIG. 1, a display device 1 composed of a liquid crystal monitor or the like is used as a display device of a personal computer or the like, and accommodates a liquid crystal display panel 11 in a housing 12. A leg 13 is attached to the housing 12, and the leg 13 is installed on a desk or the like.
[0029]
An image signal is given to the liquid crystal display device 1 from a personal computer (not shown) or the like, and a predetermined image is displayed on the liquid crystal display panel 11. In the case of a stereoscopic image, an image corresponding to the number of viewpoints is displayed. For example, when the number of viewpoints is two, the left-eye image and the right-eye image are displayed alternately. By attaching the optical separation device 2 to the liquid crystal display device 1, the device is used as a device for displaying a stereoscopic image.
[0030]
As shown in FIG. 2, in the optical separation device 2, for example, a parallax barrier is used, and a large number of stripe-shaped light-shielding thin films are formed on a substrate such as glass or transparent resin in accordance with the pitch of the liquid crystal display panel. A parallax barrier substrate 21 is held by a support frame 22. At both ends of the upper portion of the support frame 22, locking portions 23 each having a shape bent at a right angle are formed.
[0031]
As shown in FIG. 3, the position of the parallax barrier substrate 21 of the optical separation device 2 and the position of the liquid crystal display panel 11 of the liquid crystal display device 1 are aligned, and the locking portion 23 is hooked on the upper part of the housing 12 of the liquid crystal display device 1. Then, the optical separation device 2 is locked to the liquid crystal display device 1.
[0032]
As shown in FIGS. 4 and 5, the optical separation device 2 is mounted at a position covering the liquid crystal display panel 11 of the liquid crystal display device 1 at the time of use. As a result, a viewer of the liquid crystal display device 1 views an image displayed on the liquid crystal display panel 11 of the liquid crystal display device 1 through the optical separation device 2.
[0033]
For example, in the case of the binocular system, the image for the right eye and the image for the left eye are displayed on the liquid crystal display panel 11 for each column. The image transmitted through the light from the backlight is separated by the parallax barrier substrate 21, and the viewer of the liquid crystal display device 1 observes the image for the left eye with the left eye and the image for the right eye with the right eye, You will see the stereoscopic video.
[0034]
As shown in the side view of FIG. 5, the optical separation device 2 is mounted along the display surface of the liquid crystal display device 1 on which the optical separation device 2 is mounted. Are kept constant. Further, since the optical separation device 2 is locked by hooking the locking portion 23 on the upper part of the housing 12 of the liquid crystal display device 1, the optical separation device 2 can be easily detached from the liquid crystal display device 1.
[0035]
The optical separation device 2 attached to the liquid crystal display device 1 cannot perform stereoscopic vision unless the positional relationship between the pixel position of the liquid crystal display panel 11 and the stripe-shaped light-shielding thin film of the optical separation device 2 is good. That is, the image cannot be separated into right and left. Therefore, after the image is attached to the liquid crystal display device 1 by the locking member 23 on the optical separation device 2, the optical separation device 2 is adjusted.
[0036]
The following three kinds of adjustments are performed.
First, rotation adjustment of the optical separation device (parallax barrier) 2 is performed. In this adjustment, the angle between the vertical direction of the striped light-shielding thin film of the parallax barrier and the vertical direction of the pixel of the liquid crystal display panel is adjusted. This adjustment is an essential adjustment, and if it goes wrong, stereoscopic vision cannot be achieved.
[0037]
The second adjustment is a fine adjustment of the horizontal position of the optical separation device (parallax barrier) 2. In the case of the twin-lens system, fine adjustment is performed so that two viewpoints are located in front of the liquid crystal display panel. The reverse viewing state can be converted to a normal viewing state by reversing the display pixels of the left and right images. Even if this adjustment is not performed, stereoscopic viewing is possible if the observer adjusts the head position. Similarly, in the case of the multi-view system, fine adjustment is performed so that one of the viewpoint pairs is located directly in front of the display device. If the pair is not correct, it can be converted by changing the display pixels of each image.
[0038]
The third adjustment is a horizontal position adjustment (coincidence between the viewpoint and the image) of the optical separation device (parallax barrier) 2 when the process of inverting the display pixels of the left and right images is not performed in the second adjustment. . This adjustment is strictly performed including the arrangement of the left and right images (pair images). After this processing, the second fine adjustment is performed, but since these can be adjusted by a common operation, the burden on the user is reduced.
[0039]
The present invention provides a method for easily performing this adjustment. First, how the image is viewed at the optimum viewing distance in the twin-lens system will be described with reference to FIG.
[0040]
The right-eye image R and the left-eye image L are alternately displayed on the liquid crystal display panel 11. A parallax barrier substrate 21 is arranged at a distance G from the viewer side of the liquid crystal display panel 11. The parallax barrier substrate 21 is provided with a stripe-shaped light-shielding thin film 21a. An observer observes the image light passing through the opening 21b between the light shielding films 21a. No interference fringes occur at the optimum viewing distance (D). At this time, the following relationship is established.
[0041]
PD = GE
I (G + D) = 2PD
I = 2PE / (E + P)
[0042]
Here, P is the pitch between pixels, D is the optimal observation distance from the parallax barrier substrate to the viewer, G is the distance between the liquid crystal display panel and the parallax barrier substrate, and I is the distance between the openings of the parallax barrier substrate. Is the distance between the eyes of the observer.
[0043]
Generally, when the observer moves forward and backward from the optimal observation distance (D), interference fringes (moire) occur. Since the way of seeing the interference fringes (the position of light and dark) differs between the left and right eyes, a sense of discomfort occurs.
[0044]
Next, the adjusting method according to the present invention will be described. FIG. 7 shows the observation distance at the time of adjustment in the present invention.
[0045]
Assuming that J shown in FIG. 7 is an integer of 2 or more, at a distance (D / J) of 1 / J of the optimal observation distance, the interval between the points viewed by the left and right eyes through the opening is an integral multiple of P (JP). . Therefore, the light and dark positions of the interference fringes seen by the left and right eyes completely match, and the sense of incongruity is eliminated. By observing the image, the optical separation device (parallax barrier) 2 can be adjusted.
[0046]
Depending on the value of J and the image to be displayed, the colors and patterns of the interference fringes completely match, and the sense of discomfort is completely removed.
[0047]
At this time, the pitch (period) of the interference fringes is E / (J-1). When J = 2, the pitch of the interference fringes is E.
[0048]
It can be seen from the following relational expression that the above is true.
[0049]

[0050]
According to the above relationship, if the relative positions of the optical separation device (parallax barrier) 2 and the liquid crystal display panel 11 match, the colors and patterns of the interference fringes completely match. Adjustment can be easily performed by judging the coincidence of the interference fringes and the like. At this time, if an image to be displayed on the liquid crystal display panel 11 is selected, adjustment becomes easier. Hereinafter, an example of the image will be described.
[0051]
In the example shown in FIG. 8, the width of the screen of the liquid crystal display panel 11 is set to be four times the interocular distance (E) for easy understanding. Further, the observation position is a distance that is 1/2 of the optimal observation position (D). The same applies to other examples.
[0052]
In the example shown in FIG. 8, the image is made a uniform image having different colors (patterns), and the image is adjusted while looking at the stripes. For example, assuming that the first image is a right-eye image, as shown by cross-hatching in FIG. 8A, the pixel of the liquid crystal display panel on which the right-eye image is displayed has a uniform pattern or one color. Is displayed. If the second image is a left-eye image, the pixel of the liquid crystal display panel on which the left-eye image is displayed is different from the first image, as indicated by dots in FIG. 8B. An image of a uniform pattern or a single color is displayed.
[0053]
By displaying such first and second images on the liquid crystal display panel and observing them at a distance of の of the optimal observation position (D), interference fringes are observed in the eyes of the observer. The optical separation device (parallax barrier) 2 is moved and adjusted while observing the interference fringes. When the alignment is completed at a distance of の of the optimal observation position (D), the interference fringes of the first image and the second image corresponding to the width of the interocular distance E can be observed. The adjustment can be easily performed by performing the adjustment to obtain the result. In this adjustment, if one image is black and the other image is white, the interference fringes are the darkest and adjustment is easy.
[0054]
The example shown in FIG. 9 displays an image that allows the user to easily determine how the position shift has occurred. For this reason, an image in which the state of the stripe can be confirmed is added to at least one of the images. In the example of FIG. 9, as shown in FIG. 9B, an image in which the state of the stripe can be confirmed is added to the second image. The image of the first image is added to the upper and lower ends of the second image with an interocular distance E therebetween.
[0055]
When such a first image and a second image are displayed on the liquid crystal display panel and observed at a distance of の of the optimal observation position (D), the relative position between the liquid crystal display panel and the optical separation device (parallax barrier) 2 is increased. When a rotational displacement occurs at the position, the stripes are observed in an oblique state, as shown in FIG. 9C. When the observation is performed in this manner, the rotation is adjusted so that the stripes are straightened.
[0056]
If a horizontal displacement occurs in the relative position between the liquid crystal display panel and the optical separation device (parallax barrier) 2, as shown in FIG. Only be observed. When the observation is performed in this manner, the optical separation device (parallax barrier) 2 is moved horizontally, and adjustment is performed until the added image disappears.
[0057]
Further, when a horizontal positional shift occurs in the reverse viewing state, as shown in FIG. 9E, the image to which the second image is added is completely observed. When the observation is performed in this manner, it can be determined that the subject is in a pseudoscopic state at an appropriate viewing distance. In such a case, the left and right images displayed on the liquid crystal display panel can be exchanged. However, if the images are not exchanged, the optical separation device (parallax barrier) 2 is moved horizontally to remove the added image. Make adjustments until they are no longer visible. Since adjustment by display such as image replacement is not required, the burden on the user is reduced. When the alignment is completed, the image shown in FIG. 9F is observed. When the state shown in FIG. 9F is reached, the positioning has been completed in the normal viewing state at an appropriate viewing distance.
[0058]
FIG. 10 shows another example of the adjustment image. In the image shown in FIG. 10, the images are band-shaped images of the same color (pattern) and the arrangement is reversed, and the images are aligned so that the entire surface becomes uniform. The band is drawn with the center as the boundary. As shown in FIGS. 10A and 10B, both images have opposite patterns with the center as a boundary. Note that the width of the band does not necessarily need to match the interocular distance E. Adjustment is easy if at least one of the images is added with an image in which the state of the stripes can be confirmed. In the example of FIG. 10, the image is added to both images. )
[0059]
When the first image and the second image are displayed on the liquid crystal display panel and observed at a distance of １ ／ of the optimal observation position (D), when the alignment is completed, as shown in FIG. The screen is uniform.
[0060]
FIG. 11 shows still another example of the adjustment image. In the image shown in FIG. 11, as shown in FIGS. 11A and 11B, the image is a band-shaped image of the same color (pattern) and a different color (pattern). Then, as shown in FIG. 9C, the alignment is performed so that only the same color (pattern) is visible and the entire surface is uniform.
[0061]
Although not shown, it is easy to adjust if at least one of the images is added with an image in which the state of the stripes can be confirmed.
[0062]
When the first image and the second image are displayed on the liquid crystal display panel and observed at a distance of １ ／ of the optimal observation position (D), when the alignment is completed, as shown in FIG. The screen is uniform.
[0063]
FIG. 12 shows another example of the adjustment image. In the image shown in FIG. 12, as shown in FIGS. 12A and 12B, the image is a band image of a different color (pattern) on the same color (pattern) underlayer. Then, as shown in FIG. 3C, the alignment is performed so as to form a stripe pattern of different colors (patterns).
[0064]
It should be noted that if an image in which the state of the stripes can be confirmed is added to at least one of the images, adjustment is easy. In the example of FIG. 12, the image is added to both images.
[0065]
FIG. 13 shows another example of the adjusted image. In FIG. 13, the brightness of a partial area of the image is reduced to make it easier to see the observer's eyes and to confirm the front position.
[0066]
Next, an example of a multi-view system will be described. Similarly, in the case of the multi-view system, fine adjustment is performed so that one of the viewpoint pairs is located directly in front of the display device. If the pair is not correct, it can be converted by changing the display pixels of each image. FIG. 14 is a schematic diagram showing how a video image is viewed at an optimal viewing distance in a horizontal four-lens system.
[0067]
Images from viewpoints 1, 2, 3, and 4 are sequentially displayed on the liquid crystal display panel 11. A parallax barrier substrate 21 is arranged at a distance G from the viewer side of the liquid crystal display panel 11. The parallax barrier substrate 21 is provided with a stripe-shaped light-shielding thin film 21a. An observer observes a pair of video lights that have passed through the opening 21b between the light shielding films 21a.
[0068]
Assuming that J shown in FIG. 15 is an integer of 2 or more, at a distance (D / J) of 1 / J of the optimal observation distance, the interval between points viewed by the left and right eyes through the opening is an integral multiple of P (JP). . As described above, the same discussion as in the twin-lens system is made in the multi-view system, and the brightness of the interference fringes overlaps at the distance of D / J. From this, as in the case of the above-described twin-lens system, the optical separation device (parallax barrier) 2 can be adjusted by observing the image.
[0069]
FIG. 16 shows an example of an image to be displayed. For ease of understanding, the description will be made with the screen width of the liquid crystal display panel 11 being four times the interocular distance (E). Further, the observation position is a distance that is 1/2 of the optimal observation position (D). The same applies to other examples. As shown in FIG. 16A, different images are displayed for all viewpoints. When displayed in this manner, as shown in (b), different images are seen by the left and right eyes at a distance of D / 2, and adjustment is difficult. Therefore, an image to be displayed is changed to an image that can be easily adjusted.
[0070]
FIG. 17 shows an example of a horizontal four-eye adjustment image. As shown in FIG. 17A, a different image is displayed only for one viewpoint corresponding to the front, and the same image is displayed for the others. When such an image is displayed, when the adjustment is completed, as shown in FIG. 17B, the interference fringes become darker or have a color or pattern, so that it becomes easier to understand. The adjustment can be made with an image of one eye.
[0071]
It should be noted that if at least one image is added with an image in which the state of the stripes can be confirmed, adjustment is easy. In the example of FIG. 17, the image is added to all images.
[0072]
FIG. 18 shows another example of a horizontal four-lens adjustment image. As shown in FIG. 18A, a band-shaped image is displayed only for one viewpoint corresponding to the front, and the same image is displayed for the others. When such an image is displayed, at the time of completion of the adjustment, as shown in FIG. Adjust so that a band-like image can be seen only in one eye image.
[0073]
It should be noted that if at least one image is added with an image in which the state of the stripes can be confirmed, adjustment is easy. In the example of FIG. 18, the image is added to all images.
[0074]
FIG. 19 shows still another example of a horizontal four-eye adjustment image. As shown in FIG. 19A, the images are grouped into even-numbered viewpoints and odd-numbered viewpoints, and the same image is displayed on each group. When the adjustment is completed, the same image can be seen by the left and right eyes at a distance of D / 2, as shown in FIG. In this example, adjustment can be made with both eyes.
[0075]
It should be noted that if at least one image is added with an image in which the state of the stripes can be confirmed, adjustment is easy. In FIG. 19, it is added to all images.
[0076]
Also, if a mark (in FIG. 19, a circle) is added to the image for the viewpoint corresponding to the front, the correspondence between the viewpoint and the image can be correctly adjusted.
[0077]
FIG. 20 shows a different example of the horizontal four-eye adjustment image. In the example of FIG. 20, the images are grouped into even-numbered viewpoints and odd-numbered viewpoints, each of which is a band image. When the adjustment is completed, the same image can be seen by the left and right eyes at a distance of D / 2, as shown in FIG. In this example, adjustment can be made with both eyes.
[0078]
It should be noted that if at least one image is added with an image in which the state of the stripes can be confirmed, adjustment is easy. In FIG. 20, it is added to all images.
[0079]
In addition, if a mark (in FIG. 20) is added to the viewpoint image corresponding to the front, the correspondence between the viewpoint and the image can be adjusted correctly.
[0080]
FIG. 21 shows still another example of the horizontal four-eye adjustment image. In the example of FIG. 21, the image is grouped into even-numbered viewpoints and odd-numbered viewpoints, and each is formed into a band image having the same pattern. When the adjustment is completed, the same image can be seen by the left and right eyes at a distance of D / 2, as shown in FIG. In this example, adjustment can be made with both eyes.
[0081]
It should be noted that if at least one image is added with an image in which the state of the stripes can be confirmed, adjustment is easy.
[0082]
Further, if a mark (in FIG. 21) is added to the viewpoint image corresponding to the front, the correspondence between the viewpoint and the image can be correctly adjusted.
[0083]
Next, the adjustment in the case of having a plurality of viewpoints in the vertical direction will be described with reference to FIG.
[0084]
In the horizontal direction, the adjustment can be made in the same way as in the multi-view type using only the horizontal direction. Regarding the rotation adjustment, if adjustment is performed on one of the horizontal and vertical axes, the other axis is also automatically adjusted. When adjusting in the horizontal direction, the same image may be displayed in the vertical direction.
[0085]
Given the image shown in FIG. 22 (a), the image shown in FIG. 22 (b) is observed by the left and right eyes at a distance of D / 2.
[0086]
The image for each viewpoint may be a square image or a vertical band image. Also, if a mark (in the figure, a black circle) is added to the viewpoint image corresponding to the front, the correspondence between the viewpoint and the image can be adjusted correctly.
[0087]
If there are no two viewpoints strictly corresponding to the front as in the case of a horizontal seven-lens system, for example, four viewpoints 4 and 5 near the center may be selected.
[0088]
In the above-described embodiment, the optical separation device using the parallax barrier method has been described.However, any method that can generate moire, such as a lenticular lens method or a polarizing glasses method using a micropole, can be used. Adjustment can be made in a similar manner. Even in a system in which a parallax barrier, a lenticular lens, a pinhole, and the like are arranged obliquely, adjustment can be performed using an image obtained by appropriately combining an appropriate image in consideration of an observation position at the time of adjustment.
[0089]
Next, a case where a parallax barrier having pinholes arranged diagonally is used will be described. FIGS. 23 to 26 illustrate a case where the number of viewpoints is 4, and a parallax barrier having pinholes arranged obliquely is used. FIG. 23 is a schematic diagram showing a relationship between pixels displayed on the liquid crystal display screen, and FIG. 24 is a schematic diagram showing a parallax barrier corresponding to the display screen.
[0090]
As shown in FIG. 23, the images corresponding to the four viewpoints are repeatedly displayed in the order of “4”, “3”, “2”, and “1” in both the left-right direction and the up-down direction. Corresponding to this display screen, as shown in FIG. 24, the parallax barrier is provided with a diagonally striped barrier portion 21a in which pinholes 20a are formed in a stepwise manner. When this parallax barrier is used, as shown in FIGS. 25 and 26, images at viewpoints adjacent to the left and right eyes are separated and provided. FIG. 25 is a schematic diagram showing a state in which the display screen shown in FIG. 23 is viewed by the left eye at an appropriate viewing distance, and FIG. 26 is a schematic view showing a state of viewing the display screen shown in FIG. FIG.
[0091]
When the positional relationship between the display screen and the parallax barrier substrate is adjusted, as shown in FIGS. 25 and 26, in this example, images from two or three viewpoints are observed by the left and right eyes.
[0092]
Now, a description will be given of an adjustment method using a parallax barrier in which the pinholes configured as described above are arranged obliquely. At the appropriate viewing distance, as shown in FIGS. 25 and 26, the left and right eyes can observe images from one viewpoint, in this example, from two or three viewpoints. However, when observing from a position closer to the appropriate viewing position, an image from a different viewpoint is observed. FIGS. 27 and 28 show a state in which the display device is observed at a distance of half the proper viewing distance on the display device when the position adjustment between the parallax barrier and the display panel is completed. FIG. 27 shows a state in which the display screen shown in FIG. 23 is viewed by the left eye at a distance of half the optimal viewing distance, and FIG. 28 shows a state shown in FIG. 23 by the right eye at a distance of half the optimal viewing distance. It is a schematic diagram which shows the state which looked at the screen.
[0093]
In the vicinity of the front of the left and right eyes, since the positional relationship between the eye, the pinhole, and the pixel hardly changes, an image at the same viewpoint as the suitable viewing distance can be seen. However, in other areas, the positional relationship between the eye, the pinhole, and the pixel changes, so that images from different viewpoints can be seen. FIG. 29 is a schematic diagram showing which viewpoint image is roughly seen by the left and right eyes. FIG. 29A shows an image seen by the left eye, and FIG. 29B shows an image seen by the right eye. Show. In this manner, images of a plurality of viewpoints, in this embodiment, four viewpoints, are observed by the left and right eyes. FIGS. 30A and 30B show an area actually viewed by the left and right eyes in each image. FIG. 30A shows an area actually viewed by the left and right eyes in the image of viewpoint 1, and FIG. , The region actually viewed by the left and right eyes, (c) is the region actually viewed by the left and right eyes in the image of viewpoint 3, and (d) is the region actually viewed by the left and right eyes in the image of viewpoint 4. The area is shown.
[0094]
When creating the adjustment image, the colors of the respective regions, the characters to be displayed, and the like may be determined as shown in FIGS. 31A to 31D with reference to FIGS. 29 and 30. In FIG. 31, (a) is an area viewed by the left and right eyes in the image of viewpoint 1, (b) is an area viewed by the left and right eyes in the image of viewpoint 2, and (c) is an area viewed by the image of viewpoint 3 An area viewed by the left and right eyes, and (d) illustrates an area viewed by the left and right eyes in the image of the viewpoint 4. In this example, an image is created in which the left and right eyes show patterns of the same color (colors in parentheses in the figure) and characters (L) and (R) are shown only in front of each eye.
[0095]
By forming such an image, the same stripe pattern of red and blue can be seen in the left and right eyes as shown in FIG. 32A shows an image seen by the left eye, and FIG. 32B shows an image seen by the right eye. The color of the portion where no color is written may be any color.
[0096]
Here, if the characters are omitted, the images 1 and 3 and the images 2 and 4 cannot be distinguished from each other, so that they are insufficient as the adjusted images. Conversely, omitting the color and using only characters is effective as an adjusted image. In this case, the background color of all images is unified with white or the like, but since moiré of light and dark is visible, adjustment of the rotation direction may be performed while looking at the moire, and adjustment of the horizontal direction may be performed according to the character appearance.
[0097]
Next, FIG. 33 shows an example of a specific adjustment image. In FIG. 33, (a) is an area viewed by the left and right eyes in the image of viewpoint 1, (b) is an area viewed by the left and right eyes in the image of viewpoint 2, and (c) is a left and right image in the image of viewpoint 3 (D) shows an area viewed by the left and right eyes in the image of the viewpoint 4. In the state where the moiré is viewed, the vicinity of the boundary of the image is an area where the two viewpoint images are mixed. Here, a black band image is added to the upper and lower portions that are boundaries of the image as an image in which the state of the stripe can be confirmed. The image common to all the images drawn in this black band is the target for matching moire. As a result, the appearance at the time of completion of the adjustment becomes the same color or pattern up and down as shown in FIG. When the vertical pixel pitch is n times the horizontal pixel pitch, the horizontal moire pitch is equal to the interocular distance, and the vertical moire pitch is n times the interocular distance. For example, in the case of a color image, the vertical pixel pitch is tripled.
[0098]
FIG. 35 shows still another specific example of the adjustment image, and shows an example in which the characters “L” and “R” are inserted into the image. In FIG. 35, (a) is an area viewed by the left and right eyes in the image of viewpoint 1, (b) is an area viewed by the left and right eyes in the image of viewpoint 2, and (c) is a left and right image in the image of viewpoint 3 (D) shows an area viewed by the left and right eyes in the image of the viewpoint 4. When the adjustment image shown in FIG. 35 is used, when the adjustment is completed, the image can be observed as shown in FIGS. 36A shows an image seen by the left eye, and FIG. 36B shows an image seen by the right eye. , The right eye sees “R” and the left eye sees “L”. Since only the moiré near the center needs to be seen in the adjustment, the unnecessary area is set to a certain color or pattern here.
[0099]
FIG. 37 shows still another example of a specific adjustment image, in which characters and images that can be seen by the left and right eyes have meanings in both. In FIG. 37, (a) is a region viewed by the left and right eyes in the image of viewpoint 1, (b) is a region viewed by the left and right eyes in the image of viewpoint 2, and (c) is a left and right region in the image of viewpoint 3 (D) shows an area viewed by the left and right eyes in the image of the viewpoint 4. When the adjustment image shown in FIG. 36 is used, as shown in FIG. 37, the image becomes a meaningful word or face image when viewed with the left and right eyes.
[0100]
Although not shown, a fixed pattern common to all images may indicate what characters, words, figures, and the like should be finally seen.
[0101]
Next, a case where the number of viewpoints is larger will be described. Here, only the moire in the horizontal direction will be described. FIG. 39 is a schematic diagram showing a relationship between an opening of the parallax barrier 21 and pixels corresponding to eight different viewpoints. In the example of FIG. 39, the right eye observes “5” and the left eye observes “4” at an appropriate viewing distance. Then, at the distance at which the moiré is viewed when the adjustment is completed, the images visible to the left and right eyes are as shown in FIG. In FIG. 40, (a) shows an image seen by the left eye, and (b) shows an image seen by the right eye. As can be seen from FIG. 40, the front of the right eye is “5” and the front of the left eye is “4”. If the barrier shifts to the left in this state, the right eye will see "6" and the left eye will see "5" at the appropriate viewing distance, and the moiré viewing distance will be as shown in FIG. 41 (a). Conversely, if the barrier shifts to the right, the right eye will see “4” and the left eye will see “3” at the appropriate viewing distance, and the moiré viewing distance will be as shown in FIG. 41 (b).
[0102]
FIG. 42 is an example of an adjusted image of each viewpoint in such a case. (A) is an area viewed by the left and right eyes in the image of viewpoint 1, (b) is an area viewed by the left and right eyes in the image of viewpoint 2, (c) is an area viewed by the left and right eyes in the image of viewpoint 3 (D) is a region viewed by the left and right eyes in the image of viewpoint 4, (e) is a region viewed by the left and right eyes in the image of viewpoint 5, (f) is a left and right region in the image of viewpoint 6. (G) shows the area seen by the left and right eyes in the image of the viewpoint 7, and (h) shows the area seen by the left and right eyes in the image of the viewpoint 8.
[0103]
When the adjustment is completed, the arrow is not visible as shown in FIG. 43. However, when the barrier is shifted left and right, the arrow indicating the direction of adjustment is displayed on the right or left eye as shown in FIGS. 44 (a) and (b). Looks like. If the number of viewpoints is large, the adjustment range in the horizontal direction is widened, and it is possible to show that a correct position is approaching by such a method. Here, the direction of the adjustment is the direction in which the barrier is to be moved, but may be the direction in which the moiré should be moved. 40 and 41 that the movement of the barrier and the movement of the image, that is, the movement of the moire are opposite.
[0104]
When there are many viewpoints, the front image does not always need to be exactly aligned. Therefore, the adjustment can be made by simply setting the image of the viewpoint near the center to an image different from the others. In the example of FIG. 45, white bands are displayed on the images of the viewpoints 3 to 6, and adjustment is performed so that white stripes can be seen near the center of the screen in front.
[0105]
In FIG. 45, (a) is an area viewed by the left and right eyes in the image of viewpoint 1, (b) is an area viewed by the left and right eyes in the image of viewpoint 2, and (c) is an image of viewpoint 3 , The area viewed by the left and right eyes in the image of viewpoint 4, (d) the area viewed by the left and right eyes in the image of viewpoint 4, (e) the area viewed by the left and right eyes in the image of viewpoint 5, and (f) The area viewed by the left and right eyes in the image of the viewpoint 6, (g) is the area viewed by the left and right eyes in the image of the viewpoint 7, and (h) is the area viewed by the left and right eyes in the image of the viewpoint 8. Show.
[0106]
In the above example, when the number of viewpoints is an odd number, for example, 7, the image images 1 or 8 at both ends may be omitted, and in the example of FIG. 45, one of the images 3 to 6 is omitted and a white band is displayed. Three images may be used.
[0107]
The arrow can also be used for vertical adjustment, and the rotation direction can be adjusted based on the relationship between the visible arrows.
[0108]
Further, the colors, patterns, characters, images, positions where the arrows are displayed, and the like of each area do not need to be the same as in the above example.
[0109]
Further, the barrier may be different from the above example. For example, the barrier may have a shape as shown in FIG.
[0110]
In addition, in the said embodiment, although the screen width was demonstrated as four times the interocular distance, it is not limited to this.
[0111]
Also, the description has been made assuming that the distance for observing moiré is １ ／ of the appropriate viewing distance. However, in the case of で or the like, an adjusted image can be created by the same method.
[0112]
Next, an example will be described in which these adjustments are performed interactively while instructed by software. FIG. 47 is a schematic diagram illustrating an example of an image displayed on the liquid crystal display device 1. In the image, a knob for adjustment is indicated by an arrow, and the appearance when the adjustment is completed is displayed. Such an image is displayed and adjusted at each stage of the adjustment.
[0113]
FIG. 48 shows a stereoscopic video display system configuration to which this adjustment method is applied. FIG. 48 is a block diagram showing the system configuration of the stereoscopic video display device. The above-described video separation device 2 is mounted on the display 100. The display device 100 includes a liquid crystal display panel. Images from a plurality of viewpoints are displayed on the liquid crystal display panel as shown in FIG. The video processing circuit 102 takes in the image data of a plurality of viewpoints once stored in the image memory 105, performs signal processing of the treatment, and supplies the processed signal to the video drive circuit 101. The video drive circuit 101 drives a driver based on a given image signal, and causes the display device 100 to display a predetermined image. The controller 103 is configured by a microcomputer, and controls each block based on a program stored in the program memory 104. In this embodiment, an image adjustment program described later is stored in the program memory 104 in addition to a program for controlling various operations, and controls the image adjustment operation so that the user can interactively operate the image adjustment operation. .
[0114]
The image adjustment program is stored in, for example, a CD-ROM or the like, and is used by being installed in the system from the ROM. The stereoscopic image data is taken into the image memory 105 via the interface 106.
[0115]
In such a system, a procedure for interactively performing the position adjustment while instructing the position adjustment by software will be described with reference to flowcharts of FIGS. 49 and 50 and examples of display screens shown in FIGS. 51 to 57.
[0116]
When the position adjustment operation is started, an initial adjustment screen as shown in FIG. 51 is displayed on the display device 100 (step S1). On the initial adjustment screen, knobs necessary for the adjustment are indicated by arrows, and the appearance when the rotation adjustment is completed is displayed. Subsequently, the process waits for the user to perform an adjustment completion operation (step S2). When the user has completed the adjustment, the user terminates the operation by instructing a return key or an adjustment completion button using a pointing device such as a mouse. If the adjustment completion operation is not performed, the process waits until an adjustment method is instructed (step S3). When the adjustment method is instructed, the next adjustment screen, a height adjustment instruction screen, is displayed on the display device 100. It is displayed (step S4). The display shown in FIG. 52 is displayed on the display device 100.
[0117]
In accordance with the instructions displayed on the display device 100, the user adjusts and attaches the filter kit constituting the image separation device 2 to a height at which the back surface of the filter kit is in close contact with the liquid crystal display screen. Subsequently, the process waits until the next input is performed (step S5), and when the next instruction operation is performed, it is determined whether or not the instruction is to proceed to the next (step S6). If the instruction does not proceed to the next step, the process proceeds to step S7, and if it does, the process proceeds to step S8. In step S7, it is determined whether or not the instruction is to return. If the instruction is to return, the process returns to step S1 and returns to the initial screen. If not returning, in this embodiment, it is determined that completion (OK) has been instructed, and the operation ends.
[0118]
In step S <b> 8, the display device 100 causes the display device 100 to display a screen for instructing observation position adjustment, which is the next adjustment screen. The display shown in FIG. 53 is displayed on the display device 100. When the user adjusts the observation position according to the display of FIG. 53, the user waits until the next input is made (step S9), and when the next instruction operation is performed, it is determined whether or not the instruction to proceed to the next (step S10). If the instruction does not proceed to the next step, the process proceeds to step S11, and if it does, the process proceeds to step S12. In step S11, it is determined whether or not the instruction is to return. If the instruction is to return, the process returns to step S4 and returns to the height adjustment screen. If not returning, in this embodiment, it is determined that completion (OK) has been instructed, and the operation ends.
[0119]
In step S <b> 12, the display device 100 displays a screen for instructing diagonal adjustment, which is the next adjustment screen. The display shown in FIG. 54 is displayed on the display device 100. When the user adjusts the oblique observation position by turning the oblique adjustment knob in accordance with the display of FIG. 54, the user waits until the next input is performed (step S13), and when the next instruction operation is performed, an instruction to proceed to the next is performed. Is determined (step S14). If the instruction does not proceed to the next step, the process proceeds to step S15, and if it does, the process proceeds to step S16. In step S15, it is determined whether or not the instruction is to return. If the instruction is to return, the process returns to step S8 and returns to the observation position adjustment screen. If not returning, in this embodiment, it is determined that completion (OK) has been instructed, and the operation ends.
[0120]
In step S16, the display device 100 displays a screen for an instruction to adjust the observation position, which is the next adjustment screen. The display shown in FIG. 55 is displayed on the display device 100. When the user adjusts the observation position to the center of the screen according to the display of FIG. 55, the user waits until the next input is made (step S17), and when the next instruction operation is performed, it is determined whether or not the instruction to proceed to the next (step S17). Step S18). If the instruction does not proceed to the next step, the process proceeds to step S19, and if it does, the process proceeds to step S20. In step S19, it is determined whether or not the instruction is to return. If the instruction is to return, the process returns to step S12, and returns to the screen for oblique adjustment. If not returning, in this embodiment, it is determined that completion (OK) has been instructed, and the operation ends.
[0121]
In step S20, a screen for instructing horizontal position adjustment, which is the next adjustment screen, is displayed on display device 100. The display shown in FIG. 56 is displayed on the display device 100. When the user adjusts the horizontal position using the horizontal movement adjustment knob according to the display in FIG. 56, the user waits until the next input is performed (step S21), and when the next instruction operation is performed, determines whether or not the instruction to proceed to the next is made. Is performed (step S22). If the instruction does not proceed to the next step, the process proceeds to step S23, and if it does, the process proceeds to step S24. In step S23, it is determined whether or not the instruction is to return. If the instruction is to return, the process returns to step S16, and returns to the observation adjustment screen. If not returning, in this embodiment, it is determined that completion (OK) has been instructed, and the operation ends. Then, in step S24, an image indicating that the position adjustment has been completed is displayed on display device 100, and the user is prompted for confirmation. When the adjustment is completed, the user presses a return key or an OK button (not shown). It is so. Adjustment can be easily performed in this manner.
[0122]
In the above-described embodiment, the case where the optical separation device is applied to a detachable one has been described. However, after adjusting the position of the optical separation device, the stereoscopic image display device fixed to the display panel is also used for post-adjustment and image adjustment. It goes without saying that it can be applied.
[0123]
In the above-described embodiment, the liquid crystal display device is used as the image display device. However, other display devices, for example, a plasma display, a rear projection device, a device using an organic EL light emitting device, and the like can be used. .
[0124]
【The invention's effect】
As described above, according to the present invention, the light and dark positions of the interference fringes seen by the left and right eyes are completely matched, and there is no discomfort, and the optical separation device can be easily adjusted by observing the image. . In addition, since the adjustment can be performed at a distance shorter than the optimum viewing distance, the optical separation device can be reached at the time of adjustment even with a stereoscopic display device having a long optimum viewing distance, and the adjustment can be easily performed while viewing the adjustment image.
[0125]
[Brief description of the drawings]
FIG.
1 is a front view showing a liquid crystal display device to which the present invention is applied.
FIG. 2
It is a front view showing the optical separation device suitable for applying the present invention.
FIG. 3
It is a front view showing the state where this optical separation device is attached to a liquid crystal display device.
FIG. 4
It is a front view showing the state where this optical separation device was attached to a liquid crystal display device.
FIG. 5
It is a side view which shows the state which attached this optical separation apparatus to the liquid crystal display device.
FIG. 6
It is a schematic diagram which shows how the image | video looks at the optimal observation distance in a binocular stereoscopic image display apparatus.
FIG. 7
It is a schematic diagram which shows how the image | video looks at the observation distance at the time of adjustment in this invention.
FIG. 8
FIG. 5 is a diagram illustrating an example of an adjustment image according to the present invention.
FIG. 9
FIG. 5 is a diagram illustrating an example of an adjustment image according to the present invention.
FIG. 10
It is a figure showing the example of other adjustment pictures in the present invention.
FIG. 11
FIG. 14 is a diagram illustrating still another example of an adjustment image according to the present invention.
FIG.
It is a figure showing the example of a different adjustment picture in the present invention.
FIG. 13
FIG. 11 is a diagram illustrating an example of still another adjusted image according to the present invention.
FIG. 14
It is a schematic diagram which shows how the image | video looks at the optimal observation distance in a horizontal four-lens type stereoscopic image display apparatus.
FIG.
It is a schematic diagram which shows how the image | video looks at the observation distance at the time of adjustment in a horizontal four-lens stereoscopic image display apparatus.
FIG.
It is a figure which shows the display image in a horizontal four-lens type stereoscopic video display apparatus.
FIG.
FIG. 4 is a diagram illustrating an example of an adjustment image in the horizontal four-lens stereoscopic image display device according to the present invention.
FIG.
FIG. 10 is a diagram illustrating an example of another adjustment image in the horizontal four-lens stereoscopic image display device according to the present invention.
FIG.
FIG. 11 is a diagram showing an example of still another adjusted image in the horizontal four-lens stereoscopic image display device according to the present invention.
FIG.
It is a figure showing an example of a different adjustment picture in a horizontal four-lens type stereoscopic picture display in this invention.
FIG. 21
It is a figure which shows the example of a further different adjustment image in the horizontal four-lens type stereoscopic video display apparatus in this invention.
FIG.
It is a figure which shows the adjustment image in the three-dimensional video display apparatus which has several viewpoints also perpendicularly.
FIG. 23
It is a schematic diagram which shows the relationship of the pixel displayed on a liquid crystal display screen at the time of using an oblique barrier.
FIG. 24
FIG. 24 is a schematic diagram showing a parallax barrier corresponding to the display screen of FIG. 23.
FIG. 25
FIG. 24 is a schematic diagram showing a state in which the display screen shown in FIG. 23 is viewed with the left eye at an appropriate viewing distance.
FIG. 26
FIG. 24 is a schematic diagram showing a state in which the display screen shown in FIG. 23 is viewed with the right eye at an appropriate viewing distance.
FIG. 27
FIG. 24 is a schematic diagram showing a state in which the display screen shown in FIG. 23 is viewed with the left eye at a distance of half the suitable viewing distance.
FIG. 28
FIG. 24 is a schematic diagram illustrating a state in which the display screen illustrated in FIG. 23 is viewed with the right eye at a distance that is half the optimal viewing distance.
FIG. 29
It is a schematic diagram which roughly shows the image of the viewpoint which is seen by right and left eyes, (a) shows the image seen by the left eye, and (b) shows the image seen by the right eye, respectively.
FIG.
It is a schematic diagram which shows the area | region which right and left eyes actually see in each image, (a) is the area | region which right and left eyes actually see in the image of viewpoint 1, (b) is the image of viewpoint 2 , The region actually viewed by the left and right eyes, (c) is the region actually viewed by the left and right eyes in the image of viewpoint 3, and (d) is the region actually viewed by the left and right eyes in the image of viewpoint 4. Indicates the area.
FIG. 31
It is a schematic diagram which shows an example of an adjustment image, (a) is the area | region which right and left eyes are looking at in the image of viewpoint 1, (b) is the area which right and left eyes are looking at in the image of viewpoint 2, (c) Indicates an area viewed by the left and right eyes in the image of the viewpoint 3, and (d) indicates an area viewed by the left and right eyes in the image of the viewpoint 4.
FIG. 32
32A and 32B are schematic diagrams illustrating a state in which the adjustment image illustrated in FIG. 31 is observed, wherein FIG. 31A illustrates an image viewed by a left eye, and FIG.
FIG. 33
It is a schematic diagram which shows the other example of an adjustment image, (a) is the area | region which the right and left eyes look at in the image of the viewpoint 1, (b) is the area which the left and right eyes look in the image of the viewpoint 2, ( c) shows the area seen by the left and right eyes in the image of viewpoint 3, and (d) shows the area seen by the left and right eyes in the image of viewpoint 4.
FIG. 34
FIG. 34A is a schematic diagram illustrating a state in which the adjustment image illustrated in FIG. 33 is observed, wherein FIG. 33A illustrates an image viewed by the left eye, and FIG.
FIG. 35
It is a schematic diagram which shows another example of an adjustment image, (a) is the area | region which right and left eyes are looking at in the image of viewpoint 1, (b) is the area which right and left eyes are looking at in the image of viewpoint 2, (C) shows a region viewed by the left and right eyes in the image of the viewpoint 3, and (d) shows a region viewed by the left and right eyes in the image of the viewpoint 4.
FIG. 36
FIG. 36 is a schematic diagram showing a state in which the adjustment image shown in FIG. 35 is observed, where (a) shows an image seen by the left eye and (b) shows an image seen by the right eye.
FIG. 37
It is a schematic diagram which shows the different example of an adjustment image, (a) is the area | region which right and left eyes look at in the image of viewpoint 1, (b) is the area | region which right and left eyes see in the image of viewpoint 2, (c) ) Indicates an area viewed by the left and right eyes in the image of the viewpoint 3, and (d) indicates an area viewed by the left and right eyes in the image of the viewpoint 4.
FIG. 38
FIG. 32 is a schematic diagram illustrating a state in which the adjustment image illustrated in FIG. 31 is observed.
FIG. 39
It is a schematic diagram which shows the relationship between the opening part with a parallax barrier, and the pixel corresponding to eight different viewpoints.
FIG. 40
It is a schematic diagram which shows the image which can be seen at the distance which sees a moire at the time of completion of adjustment, (a) shows the image which can be seen by the left eye, (b) has shown the image which can be seen by the right eye.
FIG. 41
It is a mimetic diagram showing the state where barrier was shifted by the distance to see moiré, where (a) shows a state shifted to the left and (b) shows a state shifted to the right.
FIG. 42
It is a schematic diagram which shows an example of an adjustment image.
FIG. 43
FIG. 43 is a schematic diagram illustrating a state in which the adjustment image illustrated in FIG. 42 is observed.
FIG. 44
43A and 43B are schematic diagrams illustrating a case where the barrier is shifted in the adjustment image illustrated in FIG. 42, where FIG.
[0001]
FIG. 42 is an example of an adjusted image of each viewpoint in such a case.
FIG. 45
It is a schematic diagram which shows an example of an adjustment image.
FIG. 46
It is a top view showing the example of a parallax barrier.
FIG. 47
It is a schematic diagram which shows the example of the image displayed on a liquid crystal display device.
FIG. 48
1 is a block diagram illustrating a configuration of a stereoscopic video display system according to the present invention.
FIG. 49
It is a flowchart which shows the control operation of the adjustment image of the stereoscopic video display system of this invention.
FIG. 50
It is a flowchart which shows the control operation of the adjustment image of the stereoscopic video display system of this invention.
FIG. 51
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
FIG. 52
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
FIG. 53
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
FIG. 54
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
FIG. 55
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
FIG. 56
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
FIG. 57
It is a schematic diagram which shows the adjustment image of the stereoscopic video display system of this invention.
[Explanation of symbols]
1 Liquid crystal display device
11 LCD panel
2 Optical separation device
21 Parallax barrier board

Claims (17)

Image display means for displaying an image composed of a plurality of viewpoints, and optical separation means for separating image light from the image display means as image light from a pair of viewpoints corresponding to the left and right eyes, The state of the optical separation means is determined based on the relationship between the predetermined image and the interference fringe generated between the image display means and the optical separation means from a position different from the optimum observation position by the observer. And adjusting the state of the optical separation means. 2. The method according to claim 1, wherein the position of the observer is in front of the three-dimensional image display device, and is a position at a distance that is a fraction of an integer with respect to the optimum observation distance. . 3. The method according to claim 2, wherein the position of the observer is in front of the three-dimensional image display device, and is a position at a half distance from an optimum observation distance. . 4. The method according to claim 1, wherein the predetermined image is a band-shaped image, a uniform image, or a combination thereof. 5. The method according to claim 4, wherein the band-shaped image is drawn at a cycle that is an integral multiple of a cycle of an interference fringe generated at a position of an observer. 6. The method according to claim 4, wherein the band-shaped image is an image having a width equal to an interval between interference fringes generated at a position of an observer. 7. The method according to claim 1, wherein an image for confirming the state of interference fringes is added to the predetermined image. The method for adjusting a three-dimensional image display device according to claim 7, wherein the image for confirming the state of the interference fringes is an image representing how the interference fringes look when adjustment is completed. The method according to any one of claims 1 to 8, wherein the predetermined image has a low-luminance area within a range in which a position of an observer reflected on the stereoscopic video display device can be recognized. 9. The method according to claim 1, wherein the predetermined image is a character, an arrow, a graphic, or a combination thereof. The method according to claim 10, wherein the arrow is invisible when the adjustment is completed, and indicates a direction in which the optical separation unit should be moved in other states. 11. The method according to claim 10, wherein the arrow is invisible when the adjustment is completed, and indicates a direction in which the moiré should be moved in other states. 11. The method according to claim 10, wherein the character or graphic becomes a meaningful word or graphic when viewed with left and right eyes when the adjustment is completed. The method according to claim 8, wherein an image for confirming the state of the interference fringes is added to an area where a plurality of viewpoint images can be seen when the adjustment is completed. Image display means for displaying an image composed of a plurality of viewpoints; optical separation means for separating image light from the image display means as image light from a pair of viewpoints corresponding to the left and right eyes; Control means for controlling an image to be displayed, and means for judging an instruction of the observer, wherein the control means converts a predetermined image from which the observer can judge position adjustment at a position different from the optimal observation position. It is displayed on the image display means, and recognizes the state of the optical separation means from the relationship between interference fringes generated between the image display means and the optical separation means, and assists in adjusting the state of the optical separation means. 3D image display system. The stereoscopic image display system according to claim 15, wherein a knob position for adjustment is indicated by an arrow on the predetermined image. 17. The stereoscopic video display system according to claim 15, wherein the predetermined image is displayed as to how it looks when the adjustment is completed.

Images