JP2002189230A - Liquid crystal display device and stereoscopic display device - Google Patents
Liquid crystal display device and stereoscopic display deviceInfo
- Publication number
- JP2002189230A JP2002189230A JP2000386626A JP2000386626A JP2002189230A JP 2002189230 A JP2002189230 A JP 2002189230A JP 2000386626 A JP2000386626 A JP 2000386626A JP 2000386626 A JP2000386626 A JP 2000386626A JP 2002189230 A JP2002189230 A JP 2002189230A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- selective reflection
- reflection layer
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、低コストで高輝度
が実現できる液晶表示装置、及び立体視表示装置に関す
る。[0001] 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device capable of realizing high luminance at low cost and a stereoscopic display device.
【０００２】[0002]
【従来の技術】紙のように両面で表示可能な液晶表示装
置は、２枚の液晶表示装置を貼り合わせて実現されてい
た。2. Description of the Related Art A liquid crystal display device capable of displaying on both sides like paper has been realized by bonding two liquid crystal display devices together.
【０００３】一方、従来の立体視表示装置は、２枚の液
晶パネルを並列配置するか時分割駆動し、右目と左目の
情報を合成して表示を行っていた。On the other hand, in a conventional stereoscopic display device, two liquid crystal panels are arranged in parallel or driven in a time-division manner, and display is performed by combining information of the right and left eyes.
【０００４】[0004]
【発明が解決しようとする課題】２枚の液晶表示装置を
貼り合わせて両面表示を行うと２組の液晶表示装置が必
要となり、低コスト化が困難であった。また、厚みが増
加するという課題もあった。さらに、両面で表示可能な
液晶表示装置は吸収型の偏光板を用いており、低電力化
と高輝度化が図れなかった。When two liquid crystal display devices are bonded and two-sided display is performed, two sets of liquid crystal display devices are required, and it has been difficult to reduce the cost. There was also a problem that the thickness increased. Further, a liquid crystal display device capable of displaying images on both sides uses an absorption-type polarizing plate, so that low power and high luminance cannot be achieved.
【０００５】一方、複数の液晶パネルを用いる従来の立
体視表示装置は、バックライトも同数必要なため低電力
化が困難であった。また、時分割駆動で立体視を行う立
体視表示装置は時分割駆動のため輝度が低下する課題が
あった。On the other hand, a conventional stereoscopic display device using a plurality of liquid crystal panels requires the same number of backlights, so that it has been difficult to reduce power consumption. In addition, a stereoscopic display device that performs stereoscopic viewing by time-division driving has a problem in that luminance is reduced due to time-division driving.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決するため
に、両面表示型の液晶表示装置、及びそれを用いた立体
視表示装置において、以下の手段を講じた。In order to solve the above-mentioned problems, the following means have been taken in a double-sided display type liquid crystal display device and a stereoscopic display device using the same.
【０００７】本発明の第１の液晶表示装置は、１枚の導
光体の両面に液晶表示パネルを配置したことを特徴とす
る。導光体の両面に液晶表示パネルを配置することで、
導光体が１枚で済み低コスト化が図れる。このとき、液
晶パネルの一方を半透過型液晶パネルとし、他方を透過
型液晶パネルとすると、表示面を見る状況により、必要
な表示品位を実現することが可能である。例えば、折り
たたみ式の携帯電話において、蓋の表面を半透過型パネ
ルとし、裏面を透過型パネルの側とすると、待機時は低
消費電力に優れた半透過型パネルのみ駆動し、動画像等
の高品位表示時は裏面の透過型パネルを使用することが
できる。また、本発明の液晶表示装置は、導光体と液晶
パネル間に偏光選択反射層を積層し、さらに導光体の両
側で偏光選択反射層が互いに異なる偏光選択性を有する
ことを特徴とする。A first liquid crystal display device according to the present invention is characterized in that liquid crystal display panels are arranged on both sides of one light guide. By arranging liquid crystal display panels on both sides of the light guide,
Only one light guide is required and cost reduction can be achieved. At this time, if one of the liquid crystal panels is a transflective liquid crystal panel and the other is a transmissive liquid crystal panel, necessary display quality can be realized depending on the situation of viewing the display surface. For example, in a foldable mobile phone, if the front surface of the lid is a transflective panel and the rear surface is the side of the transmissive panel, only the transflective panel with low power consumption is driven during standby, and a At the time of high-quality display, a transmission type panel on the back side can be used. Further, the liquid crystal display device of the present invention is characterized in that a polarization selective reflection layer is laminated between the light guide and the liquid crystal panel, and the polarization selective reflection layers have different polarization selectivities on both sides of the light guide. .
【０００８】偏光選択反射層として、例えば導光体の片
側にＰ波を透過しＳ波を反射するものを設け、他方の側
にはＳ波を透過しＰ波を反射するものを設ける。この場
合、一方の偏光選択反射層で反射した反射光は他方の偏
光選択反射層を透過することが可能である。従って導光
体の両側に液晶パネルを積層してもバックライト光が吸
収されることなく効率的にどちらかの液晶パネルに入射
される。このため低電力化と高輝度化が図れる。このと
き、偏光選択反射層は、円偏光に対して偏光選択性を有
しても同様の効果が得られる。As the polarization selective reflection layer, for example, a layer that transmits a P-wave and reflects an S-wave is provided on one side of the light guide, and a layer that transmits a P-wave and reflects the P-wave is provided on the other side. In this case, the reflected light reflected on one polarization selective reflection layer can pass through the other polarization selective reflection layer. Therefore, even if liquid crystal panels are stacked on both sides of the light guide, the backlight light is efficiently incident on one of the liquid crystal panels without being absorbed. Therefore, low power and high luminance can be achieved. At this time, the same effect can be obtained even if the polarization selective reflection layer has polarization selectivity for circularly polarized light.
【０００９】本発明の第２の液晶表示装置は、光源を配
設した第１基板の片面側に第１液晶層と第２基板が形成
され、第１基板の他面側に第２液晶層と第３基板が形成
された液晶表示装置において、第１基板と第１液晶層、
及び第１基板と第２液晶層間に偏光選択反射層が積層さ
れ、さらに第１基板の両側で偏光選択反射層が互いに異
なる偏光選択性を有することを特徴とする。導光体を別
途用いずに、液晶層を保持する基板自体に導光機能を持
たせ、さらに偏光選択反射層を基板に内付けすることで
薄型化が図れる。According to a second liquid crystal display device of the present invention, a first liquid crystal layer and a second substrate are formed on one surface of a first substrate on which a light source is disposed, and a second liquid crystal layer is formed on the other surface of the first substrate. And a third substrate, the first substrate and the first liquid crystal layer,
And a polarization selective reflection layer is laminated between the first substrate and the second liquid crystal layer, and the polarization selective reflection layers have different polarization selectivities on both sides of the first substrate. Without using a light guide separately, the substrate holding the liquid crystal layer itself has the light guiding function, and the polarization selective reflection layer is internally provided in the substrate, whereby the thickness can be reduced.
【００１０】本発明の第３の液晶表示装置は、光源を配
設した導光体の片面に第１液晶パネルが積層され、第１
液晶パネルが、導光体側から第１偏光選択反射層、第１
液晶層、及び第２偏光選択反射層を有し、さらに導光体
の他面に第２液晶パネルが積層され、第２液晶パネル
が、導光体側から第３偏光選択反射層、第２液晶層、及
び第４偏光選択反射層を有するときに、第１偏光選択反
射層と第３偏光選択反射層が互いに異なる偏光選択性を
有し、さらに第１偏光選択反射層と第２偏光選択反射
層、及び第３偏光選択反射層と第４偏光選択反射層がそ
れぞれ互いに異なる偏光選択性を有することを特徴とす
る。本構成により、第１液晶パネル、及び第２液晶パネ
ルの黒表示部に入射した光が導光体に再度入射すること
が可能となり、光利用効率がさらに向上する。In a third liquid crystal display device according to the present invention, a first liquid crystal panel is laminated on one side of a light guide provided with a light source,
The liquid crystal panel has a first polarization selective reflection layer,
A liquid crystal layer, a second polarization selective reflection layer, and a second liquid crystal panel laminated on the other surface of the light guide, wherein the second liquid crystal panel is a third polarization selective reflection layer, a second liquid crystal from the light guide side. The first polarization selective reflection layer and the third polarization selective reflection layer have different polarization selectivity from each other, and further have the first polarization selective reflection layer and the second polarization selective reflection layer. The layers and the third and fourth polarization selective reflection layers have different polarization selectivities from each other. According to this configuration, light that has entered the black display portions of the first liquid crystal panel and the second liquid crystal panel can enter the light guide again, and the light use efficiency is further improved.
【００１１】本発明の第４の液晶表示装置は、端面付近
に光源を配設した第１基板の片面側に第１基板側から、
第１偏光選択反射層、第１液晶層、第２偏光選択反射
層、及び第２基板が形成され、第１基板の他面側に第１
基板側から第３偏光選択反射層、第２液晶層、第４偏光
選択反射層、及び第３基板が形成された液晶表示装置に
おいて、第１偏光選択反射層と第３偏光選択反射層が互
いに異なる偏光選択性を有し、さらに第１偏光選択反射
層と第２偏光選択反射層、及び第３偏光選択反射層と第
４偏光選択反射層がそれぞれ互いに異なる偏光選択性を
有することを特徴とする。本構成により第３の液晶表示
装置と同様の理由で光利用効率が向上する。In a fourth liquid crystal display device according to the present invention, a light source is disposed near an end face on one side of a first substrate.
A first polarization selective reflection layer, a first liquid crystal layer, a second polarization selective reflection layer, and a second substrate are formed, and the first substrate is formed on the other surface of the first substrate.
In the liquid crystal display device in which the third polarization selective reflection layer, the second liquid crystal layer, the fourth polarization selective reflection layer, and the third substrate are formed from the substrate side, the first polarization selective reflection layer and the third polarization selective reflection layer are mutually separated. It has different polarization selectivity, and the first polarization selective reflection layer and the second polarization selective reflection layer, and the third polarization selective reflection layer and the fourth polarization selective reflection layer each have different polarization selectivity. I do. With this configuration, the light use efficiency is improved for the same reason as in the third liquid crystal display device.
【００１２】本発明の第１の立体視表示装置は、請求項
５から８記載の液晶表示装置の何れかと光路変更機構を
含む立体視表示装置において、前記液晶表示装置の両側
の表示部がそれぞれ右目信号と左目信号を表示し、光路
変更機構により、右目信号と左目信号が合成されること
で立体視を行うことを特徴とする。両面表示のそれぞれ
を右目と左目の信号に用いることで立体視が可能とな
る。A first stereoscopic display device according to the present invention is a stereoscopic display device including any one of the liquid crystal display devices according to claims 5 to 8 and an optical path changing mechanism, wherein the display units on both sides of the liquid crystal display device are respectively provided. A right-eye signal and a left-eye signal are displayed, and stereoscopic viewing is performed by combining the right-eye signal and the left-eye signal by an optical path changing mechanism. By using each of the two-sided display for the signals of the right eye and the left eye, stereoscopic viewing becomes possible.
【００１３】本発明の第２の立体視表示装置は、請求項
５から８記載の液晶表示装置の何れかと光路変更機構を
含む立体視表示装置において、液晶表示装置の両側の表
示部がそれぞれ右目信号と左目信号を表示し、光路変更
機構により、右目信号と左目信号が別個にそれぞれ右目
と左目に入射することで立体視を行うことを特徴とす
る。According to a second stereoscopic display device of the present invention, in the stereoscopic display device including the liquid crystal display device according to any one of claims 5 to 8 and an optical path changing mechanism, the display portions on both sides of the liquid crystal display device are each provided with a right eye. A signal and a left-eye signal are displayed, and stereoscopic viewing is performed by the right-path signal and the left-eye signal being separately incident on the right-eye and the left-eye, respectively, by an optical path changing mechanism.
【００１４】信号が右目と左目に個別に入射しても立体
視が得られる。[0014] Even if the signals enter the right eye and the left eye individually, a stereoscopic vision can be obtained.
【００１５】本発明の第３の立体視表示装置は、請求項
５から８記載の液晶表示装置の何れかと光路変更機構を
含む立体視表示装置において、液晶表示装置の両側の表
示部がそれぞれ目の焦点深度が異なる状態に対応する表
示情報を表示し、光路変更機構により表示情報を合成す
ることで立体視を行うことを特徴とする。目の焦点深度
が異なる状態に対応する表示情報を重ねても立体視が得
られる。According to a third stereoscopic display device of the present invention, in the stereoscopic display device including the liquid crystal display device according to any one of claims 5 to 8 and an optical path changing mechanism, the display portions on both sides of the liquid crystal display device are each provided with an eye. Is characterized in that display information corresponding to a state in which the focal depths are different is displayed, and the display information is synthesized by an optical path changing mechanism to perform stereoscopic viewing. Even when the display information corresponding to the state where the depth of focus of the eyes is different is superimposed, stereoscopic vision can be obtained.
【００１６】[0016]
【発明の実施の形態】以下の実施の形態１から４の液晶
表示装置は、基板の両側に表示部を有する液晶表示装置
である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The liquid crystal display devices according to the following first to fourth embodiments are liquid crystal display devices having a display portion on both sides of a substrate.
【００１７】（実施の形態１）図２は本発明の液晶表示
装置で光利用効率が向上することを示す原理図である。
図２において、光源２０７から無偏光で出射した光源光
２０３が、偏光選択反射層Ａ２０１に入射すると、偏光
選択反射層Ａ２０１を直線偏光のＳ波２０５は透過する
がＰ波２０４は反射する。反射したＰ波２０４は偏光選
択反射層Ｂ２０２に入射する。このとき、偏光選択反射
層Ｂ２０２がＰ波を透過しＳ波を反射する構成であれ
ば、偏光選択反射層Ａ２０１からの反射光は偏光選択反
射層Ｂ２０２を透過する。このため原理的に光源光２０
３は偏光選択反射層Ａ２０１、または偏光選択反射層Ｂ
２０２のどちらかを透過することになる。このため、従
来の吸収型偏光層を用いる場合に比べ光利用効率が大幅
に向上する。なお、偏光の選択性はＰ波とＳ波以外にも
左円偏光と右円偏光に対して選択性を有しても良い。偏
光選択反射層Ａ２０１と偏光選択反射層Ｂ２０２で偏光
選択性が互いに異なれば、同様の効果が得られる。(Embodiment 1) FIG. 2 is a principle view showing that the light use efficiency is improved in the liquid crystal display device of the present invention.
In FIG. 2, when light source light 203 emitted from the light source 207 as unpolarized light enters the polarization selective reflection layer A201, the linearly polarized S wave 205 is transmitted through the polarization selective reflection layer A201, but the P wave 204 is reflected. The reflected P-wave 204 enters the polarization selective reflection layer B202. At this time, if the polarization selective reflection layer B202 transmits the P wave and reflects the S wave, the reflected light from the polarization selective reflection layer A201 transmits through the polarization selective reflection layer B202. Therefore, in principle, the light source light 20
3 is a polarization selective reflection layer A201 or a polarization selective reflection layer B
202 will be transmitted. Therefore, the light use efficiency is greatly improved as compared with the case where the conventional absorption type polarizing layer is used. Note that the polarization selectivity may have selectivity for left-handed circularly polarized light and right-handed circularly polarized light in addition to the P-wave and S-wave. The same effect can be obtained if the polarization selective reflection layer A201 and the polarization selective reflection layer B202 have different polarization selectivities.
【００１８】図１は本発明の第１の液晶表示装置の断面
図である。光源１１４を出射した光の一部は、集光フィ
ルム１０１で法線方向に集光された後、偏光選択反射層
Ａ１０２に入射する。偏光選択反射層Ａ１０２は、Ｐ波
を反射しＳ波を透過する構成を有している。このため、
Ｓ波は液晶Ａ１０４を透過し、基板Ｂ１０５から出射す
る（出射光Ａ１１５）。一方、Ｐ波は偏光選択反射層Ａ
１０２で反射して、偏光選択反射層Ｂ１０８に入射す
る。偏光選択反射層Ｂ１０８はＰ波を透過しＳ波を反射
する構成を有している。このため、偏光選択反射層Ａ１
０２からの反射光（Ｐ波）は偏光選択反射層Ｂ１０８を
透過し、基板Ｄ１１１から出射する（出射光Ｂ１１
６）。FIG. 1 is a sectional view of a first liquid crystal display device of the present invention. Part of the light emitted from the light source 114 is condensed in the normal direction by the light condensing film 101, and then enters the polarization selective reflection layer A102. The polarization selective reflection layer A102 has a configuration that reflects a P wave and transmits an S wave. For this reason,
The S wave transmits through the liquid crystal A104 and exits from the substrate B105 (emission light A115). On the other hand, the P wave is
The light is reflected at 102 and enters the polarization selective reflection layer B108. The polarization selective reflection layer B108 has a configuration that transmits a P wave and reflects an S wave. Therefore, the polarization selective reflection layer A1
02 (P wave) is transmitted through the polarization selective reflection layer B108 and is emitted from the substrate D111 (emitted light B11).
6).
【００１９】一方、光源から偏光選択反射層Ｂ１０８に
入射した光も同様の原理で、Ｐ波は出射光Ｃ１１７と成
り、Ｓ波は出射光Ｄ１１８と成る。このため光源の光は
吸収されること無く基板Ｂ１０５、又は基板Ｄ１１１の
一方から出射されることに成り、光利用効率が向上す
る。On the other hand, the light incident on the polarization selective reflection layer B108 from the light source has the same principle, and the P wave becomes the emission light C117 and the S wave becomes the emission light D118. Therefore, the light of the light source is emitted from one of the substrate B105 and the substrate D111 without being absorbed, and the light use efficiency is improved.
【００２０】Ｐ波とＳ波の偏光選択反射層としては、例
えばＤ−ＢＥＦ（３Ｍ社製）を用いることができる。ま
た、円偏光に対する偏光選択性を利用しても良く、例え
ばコレステリック液晶ポリマー素子等を用いることがで
きる。As the P- and S-wave polarization selective reflection layers, for example, D-BEF (manufactured by 3M) can be used. In addition, the polarization selectivity for circularly polarized light may be used. For example, a cholesteric liquid crystal polymer element or the like can be used.
【００２１】また、集光フィルムを用いることで、光源
光が法線方向に集光され偏光選択性が向上する。これ
は、偏光選択反射層の偏光選択性には入射角度依存性が
あり、法線方向が最も偏光選択性が高いためである。Further, by using the light-condensing film, the light from the light source is condensed in the normal direction and the polarization selectivity is improved. This is because the polarization selectivity of the polarization selective reflection layer depends on the incident angle, and the normal direction has the highest polarization selectivity.
【００２２】上記は透過型の液晶表示装置の構成である
が、これは画素の一部に開口を有するか、半透過膜を用
いた半透過型液晶表示装置の構成でも良い。また、導光
体を挟んだ一方が透過型で他方が半透過型でも良い。The above is the configuration of the transmissive liquid crystal display device, which may have an opening in a part of the pixel or a transflective liquid crystal display device using a transflective film. Further, one of the light guides may be of a transmissive type and the other may be of a transflective type.
【００２３】また、導光体を挟んで配置された液晶パネ
ルの一方が透過型液晶パネルか半透過型パネルで、他方
が反射型パネルでも良い。この場合、両面表示は出来な
いが、片側から表示面を観察する場合に、必要に応じて
反射型表示と透過型（又は半透過型）表示を切り替える
ことができる。このため反射型で低消費電力、透過型で
高品位表示と目的に応じて使い分けが可能である。One of the liquid crystal panels sandwiching the light guide may be a transmissive liquid crystal panel or a transflective panel, and the other may be a reflective panel. In this case, double-sided display is not possible, but when observing the display surface from one side, it is possible to switch between reflective display and transmissive (or semi-transmissive) display as necessary. For this reason, it is possible to use the reflective type with low power consumption and the transmissive type with high quality display depending on the purpose.
【００２４】（実施の形態２）図３は本発明の第２の液
晶表示装置の断面図を示す。基板Ａ３００の両側に偏光
選択反射層と液晶層を形成し、基板Ａ３００の端部に光
源３１１が埋め込まれている。基板Ａ３００は液晶の保
持機能と導光体の機能を兼用している。このとき、実施
の形態１に示した導光体が不要となり薄型化が図れる。(Embodiment 2) FIG. 3 is a sectional view of a second liquid crystal display device according to the present invention. A polarization selective reflection layer and a liquid crystal layer are formed on both sides of the substrate A300, and a light source 311 is embedded at an end of the substrate A300. The substrate A300 has both the function of holding liquid crystal and the function of a light guide. At this time, the light guide shown in Embodiment 1 is not required, and the thickness can be reduced.
【００２５】基板Ａ３００の表面には、光源光が基板内
を均一に導光するように微小な凹凸構造を設けても良
い。凹凸構造としては、溝状、ドット状、または半円柱
状等の凹凸構造を、面内輝度が均一となるように大きさ
と分布密度を適時変えて用いることができる。A fine uneven structure may be provided on the surface of the substrate A300 so that the light from the light source can be uniformly guided in the substrate. As the concavo-convex structure, a concavo-convex structure such as a groove shape, a dot shape, or a semi-cylindrical shape can be used by appropriately changing its size and distribution density so that in-plane luminance is uniform.
【００２６】（実施の形態３）図４は本発明の第３の液
晶表示装置の断面図を示す。実施の形態１と同様の構成
において、基板Ｃ４２１の外側に偏光選択反射層Ｄ４２
２、基板Ｄ４１１の外側に偏光選択反射層Ｃ４１２を形
成した。また、偏光選択反射層Ａ４０２と偏光選択反射
層Ｂ４０８は異なる偏光選択反射性を有する。さらに、
偏光選択反射層Ａ４０２と偏光選択反射層Ｄ４２２、及
び偏光選択反射層Ｂ４０８と偏光選択反射層Ｃ４１２も
異なる偏光選択反射性を有する。具体的には、偏光選択
反射層Ａ４０２と偏光選択反射層Ｃ４１２は、Ｓ波を透
過してＰ波を反射する。また、偏光選択反射層Ｄ４２２
と偏光選択反射層Ｂ４０８は、Ｐ波を透過してＳ波を反
射する。また、液晶Ａ４０４、液晶Ｂ４１０は黒表示時
に液晶層を通過する光に対して位相が変調せず白表示時
に位相変調を行う表示モードとする。本構成により、パ
ネルの黒表示部に相当する位置の液晶層に入射した光源
光は導光体側に反射され、導光体の反対側に位置する液
晶層の白表示部から出射することが可能と成る。このた
め、光利用効率がさらに向上する。(Embodiment 3) FIG. 4 is a sectional view of a third liquid crystal display device according to the present invention. In the same configuration as in the first embodiment, the polarization selective reflection layer D42 is provided outside the substrate C421.
2. A polarization selective reflection layer C412 was formed outside the substrate D411. Further, the polarization selective reflection layer A402 and the polarization selective reflection layer B408 have different polarization selective reflection properties. further,
The polarization selective reflection layer A402 and the polarization selective reflection layer D422, and the polarization selective reflection layer B408 and the polarization selective reflection layer C412 also have different polarization selective reflection properties. Specifically, the polarization selective reflection layer A402 and the polarization selective reflection layer C412 transmit an S wave and reflect a P wave. In addition, the polarization selective reflection layer D422
And the polarization selective reflection layer B408 transmits the P wave and reflects the S wave. In addition, the liquid crystal A404 and the liquid crystal B410 are set to a display mode in which the phase of light passing through the liquid crystal layer during black display is not modulated and the phase is modulated during white display. With this configuration, the light source light incident on the liquid crystal layer at the position corresponding to the black display portion of the panel is reflected toward the light guide, and can be emitted from the white display portion of the liquid crystal layer located on the opposite side of the light guide. It becomes. Therefore, the light use efficiency is further improved.
【００２７】偏光選択反射層Ａ４０２を透過したＳ波の
うち、黒表示部４０５に入射した光は、液晶層で位相変
調を受けない。このため偏光選択反射層Ｄ４２２にＳ波
のまま入射し、導光体側に反射されて反対側の白表示部
４１３から出射する。また、白表示部４０６に入射した
光は液晶Ａ４０４で位相変調（Ｓ波→Ｐ波）を受けるた
め基板Ｃ４２１側から出射する（出射光Ｂ４１８）。Of the S waves transmitted through the polarization selective reflection layer A402, the light incident on the black display portion 405 is not subjected to phase modulation by the liquid crystal layer. Therefore, the S-wave enters the polarization selective reflection layer D422 as it is, is reflected toward the light guide, and exits from the white display unit 413 on the opposite side. Further, the light incident on the white display portion 406 exits from the substrate C421 side because the liquid crystal A404 receives the phase modulation (S wave → P wave) (emitted light B418).
【００２８】液晶層の表示モードには、ノーマリブラッ
クモードの場合は横電界で駆動するホモジニアス配向
や、垂直配向モードを用いることができる。また、捻れ
ネマチック配向の場合は、ノーマリホワイトモードで用
いると黒表示時に位相変調が小さく良好な偏光選択性が
得られる。As the display mode of the liquid crystal layer, in the case of the normally black mode, a homogeneous alignment driven by a lateral electric field or a vertical alignment mode can be used. In the case of the twisted nematic orientation, when used in the normally white mode, the phase modulation is small at the time of black display, and good polarization selectivity can be obtained.
【００２９】（実施の形態４）図５は本発明の第４の液
晶表示装置の断面図である。実施の形態２とほぼ同様の
構成で、基板Ｂ５０３の外側に偏光選択反射層Ｂ５０
４、基板Ｃ５０７の外側に偏光選択反射層Ｄ５０８を形
成した。また、偏光選択反射層Ａ５０１と偏光選択反射
層Ｃ５０５は異なる偏光選択反射性を有する。さらに、
偏光選択反射層Ａ５０１と偏光選択反射層Ｂ５０４、及
び偏光選択反射層Ｃ５０５と偏光選択反射層Ｄ５０８も
異なる偏光選択反射性を有する。具体的には、偏光選択
反射層Ａ５０１と偏光選択反射層Ｄ５０８は、Ｓ波を透
過してＰ波を反射する。また、偏光選択反射層Ｃ５０５
と偏光選択反射層Ｂ５０４は、Ｐ波を透過してＳ波を反
射する。(Embodiment 4) FIG. 5 is a sectional view of a fourth liquid crystal display device of the present invention. With a configuration substantially similar to that of the second embodiment, a polarization selective reflection layer B50 is provided outside the substrate B503.
4. A polarization selective reflection layer D508 was formed outside the substrate C507. Further, the polarization selective reflection layer A501 and the polarization selective reflection layer C505 have different polarization selective reflection properties. further,
The polarization selective reflection layer A501 and the polarization selective reflection layer B504, and the polarization selective reflection layer C505 and the polarization selective reflection layer D508 also have different polarization selective reflection properties. Specifically, the polarization selective reflection layer A501 and the polarization selective reflection layer D508 transmit an S wave and reflect a P wave. In addition, the polarization selective reflection layer C505
And the polarization selective reflection layer B504 transmits the P wave and reflects the S wave.
【００３０】また、液晶Ａ５０２、液晶Ｂ５０６は黒表
示時に液晶層を通過する光に対して位相が変調せず白表
示時に位相変調を行う表示モードとする。本構成によ
り、実施の形態３と同様の原理で光利用効率が向上す
る。The liquid crystal A 502 and the liquid crystal B 506 are in a display mode in which the phase of light passing through the liquid crystal layer during black display is not modulated and the phase is modulated during white display. With this configuration, the light use efficiency is improved on the same principle as in the third embodiment.
【００３１】以下の実施の形態５、及び６の液晶表示装
置は基板の片側に表示部を有する液晶表示装置である。The liquid crystal display devices according to the following fifth and sixth embodiments are liquid crystal display devices having a display portion on one side of a substrate.
【００３２】（実施の形態５）図６は本発明の第１の立
体視表示装置の構成図である。導光体９００に液晶パネ
ルＡ９０１と液晶パネルＢ９０２が積層された実施の形
態１記載の液晶表示装置が配置されている。表示面に対
面して、光路変更機構として反射板Ａ９０４、反射板Ｂ
９０５、光学素子Ａ９０６、及び光学素子Ｂ９０７が配
置されている。光学素子は、表示面の信号をスクリーン
９０８上に均一に照射する機能を有している。また、液
晶表示装置は両面の表示面がそれぞれ右目信号と左目信
号を表示する。信号は上記の光路変更機構により、スク
リーン９０８上で合成されることで立体視が可能とな
る。(Embodiment 5) FIG. 6 is a configuration diagram of a first stereoscopic display device of the present invention. The liquid crystal display device according to the first embodiment in which the liquid crystal panel A901 and the liquid crystal panel B902 are stacked on the light guide 900 is provided. Reflecting plate A904, reflecting plate B as an optical path changing mechanism facing the display surface
905, an optical element A906, and an optical element B907. The optical element has a function of uniformly irradiating a signal on the display surface onto the screen 908. In the liquid crystal display device, both display surfaces respectively display a right eye signal and a left eye signal. The signals are combined on the screen 908 by the above-described optical path changing mechanism to enable stereoscopic viewing.
【００３３】液晶表示装置は、実施形態１から４記載の
液晶表示装置の何れかを用いれば良い。また、光路変更
機構は上記以外にもスクリーン上で右目信号と左目信号
が合成できるように形成できる。As the liquid crystal display device, any one of the liquid crystal display devices described in the first to fourth embodiments may be used. In addition, the optical path changing mechanism can be formed so that the right-eye signal and the left-eye signal can be combined on the screen.
【００３４】（実施の形態６）図７は本発明の第２の立
体視表示装置の構成図である。導光体８００、液晶パネ
ルＡ８０１、及び液晶パネルＢ８０２等から成る実施の
形態１記載の液晶表示装置が配置されている。また、反
射板Ａ８０３、及び反射板Ｂ８０４から成る光路変更機
構が形成されている。このとき、液晶表示装置の両側の
表示部がそれぞれ右目信号と左目信号を表示し、光路変
更機構により、右目信号と左目信号が別個にそれぞれ右
目と左目に入射する構成とすることで、立体視を行うこ
とが可能となる。(Embodiment 6) FIG. 7 is a configuration diagram of a second stereoscopic display device of the present invention. The liquid crystal display device according to the first embodiment, which includes a light guide 800, a liquid crystal panel A801, a liquid crystal panel B802, and the like, is provided. Further, an optical path changing mechanism including a reflection plate A 803 and a reflection plate B 804 is formed. At this time, the display units on both sides of the liquid crystal display device display the right-eye signal and the left-eye signal, respectively, and the optical path changing mechanism causes the right-eye signal and the left-eye signal to be separately incident on the right-eye and the left-eye, respectively. Can be performed.
【００３５】（実施の形態７）本発明の第３の立体視表
示装置は、実施の形態５と同様の構成において、液晶表
示装置の両側の表示部が、それぞれ目の焦点深度が異な
る状態に対応する表示情報を表示する。目の焦点深度が
異なる画像を合成すると立体視を行うことが可能とな
る。(Embodiment 7) In a third stereoscopic display apparatus according to the present invention, in a configuration similar to that of Embodiment 5, the display sections on both sides of the liquid crystal display apparatus have different focal depths of eyes. Displays the corresponding display information. When images with different focal depths of eyes are combined, stereoscopic vision can be performed.
【００３６】[0036]
【発明の効果】以上、本発明によれば、両面表示、又は
片面表示の液晶表示装置の光利用効率が向上し高輝度化
と低電力化が図れる。また、基板に導光体機能を付与す
ることで、薄型化が図れる。As described above, according to the present invention, the light use efficiency of the liquid crystal display device for double-sided display or single-sided display is improved, and higher luminance and lower power can be achieved. Further, by providing the substrate with a light guide function, the thickness can be reduced.
【図１】実施の形態１の液晶表示装置の断面図FIG. 1 is a cross-sectional view of a liquid crystal display device of Embodiment 1.
【図２】光利用効率の向上の原理図FIG. 2 is a diagram illustrating the principle of improving light use efficiency.
【図３】実施の形態２の液晶表示装置の断面図FIG. 3 is a cross-sectional view of a liquid crystal display device according to Embodiment 2.
【図４】実施の形態３の液晶表示装置の断面図FIG. 4 is a cross-sectional view of a liquid crystal display device according to a third embodiment.
【図５】実施の形態４の液晶表示装置の断面図FIG. 5 is a cross-sectional view of a liquid crystal display device of Embodiment 4.
【図６】実施の形態５の立体視表示装置の構成図FIG. 6 is a configuration diagram of a stereoscopic display device according to a fifth embodiment.
【図７】実施の形態６の立体視表示装置の構成図FIG. 7 is a configuration diagram of a stereoscopic display device according to a sixth embodiment.
１００ 導光体 １０１ 集光フィルム １０２ 偏光選択反射層Ａ １０３ 基板Ａ １０４ 液晶Ａ １０５ 基板Ｂ １０６ 偏光板Ａ １０７ 集光フィルム １０８ 偏光選択反射層Ｂ １０９ 基板Ｃ １１０ 液晶Ｂ １１１ 基板Ｄ １１２ 偏光板Ｂ １１３ ランプカバー １１４ 光源 １１５ 出射光Ａ １１６ 出射光Ｂ １１７ 出射光Ｃ １１８ 出射光Ｄ REFERENCE SIGNS LIST 100 light guide 101 condensing film 102 polarization selective reflection layer A 103 substrate A 104 liquid crystal A 105 substrate B 106 polarizing plate A 107 condensing film 108 polarization selective reflection layer B 109 substrate C 110 liquid crystal B 111 substrate D 112 polarizing plate B 113 Lamp cover 114 Light source 115 Outgoing light A 116 Outgoing light B 117 Outgoing light C 118 Outgoing light D
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｇ０２Ｆ 1/13357 Ｇ０９Ｆ 9/00 ３３６Ｊ ５Ｃ０９４ Ｇ０９Ｆ 9/00 ３３６ ３６１ ５Ｇ４３５ ３６１ 9/40 ３０３ 9/40 ３０３ Ｈ０４Ｎ 13/04 Ｈ０４Ｎ 13/04 Ｇ０２Ｆ 1/1335 ５３０ Ｆターム(参考） 2H049 BA05 BA43 BB03 BB06 BC22 2H088 EA08 HA18 HA21 HA30 MA06 2H089 HA21 QA16 TA15 TA17 TA18 UA09 2H091 FA08Z FA14Z FA37Z FA41Z FD15 LA16 MA01 5C061 AB11 AB14 AB16 AB18 5C094 AA10 AA15 AA22 AA56 BA16 BA43 CA21 DA01 DA08 DA12 DA13 EA04 EA05 EA06 EB02 EB03 EB04 ED11 ED14 FA02 5G435 AA03 AA18 BB12 BB15 BB16 CC11 DD04 DD10 EE11 EE27 FF03 FF05 FF08 FF11 GG46──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) G02F 1/13357 G09F 9/00 336J 5C094 G09F 9/00 336 361 5G435 361 9/40 303 9/40 303 H04N 13/04 H04N 13/04 G02F 1/1335 530 F-term (reference) 2H049 BA05 BA43 BB03 BB06 BC22 2H088 EA08 HA18 HA21 HA30 MA06 2H089 HA21 QA16 TA15 TA17 TA18 UA09 2H091 FA08Z FA14Z FA37Z FA41Z14 AB11 AB16 AB11 AA10 AA15 AA22 AA56 BA16 BA43 CA21 DA01 DA08 DA12 DA13 EA04 EA05 EA06 EB02 EB03 EB04 ED11 ED14 FA02 5G435 AA03 AA18 BB12 BB15 BB16 CC11 DD04 DD10 EE11 EE27 FF03 FF05 FF08 FF11 GG46
Claims (17)
た液晶表示装置。1. A liquid crystal display device in which liquid crystal display panels are arranged on both sides of a light guide.
示パネルであり、他方が透過型液晶表示パネルであるこ
とを特徴とする請求項１記載の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein one of said liquid crystal panels is a transflective liquid crystal display panel and the other is a transmissive liquid crystal display panel.
パネルであり、他方が透過型液晶表示パネルであること
を特徴とする請求項１記載の液晶表示装置。3. The liquid crystal display device according to claim 1, wherein one of said liquid crystal panels is a reflection type liquid crystal display panel and the other is a transmission type liquid crystal display panel.
示パネルであることを特徴とする請求項１記載の液晶表
示装置。4. The liquid crystal display device according to claim 1, wherein both of said liquid crystal panels are transmissive liquid crystal display panels.
晶表示装置において、前記導光体と前記液晶パネル間に
偏光選択反射層が配置され、さらに前記導光体の両側で
前記偏光選択反射層が互いに異なる偏光選択性を有する
ことを特徴とする液晶表示装置。5. A liquid crystal display device in which a liquid crystal panel is disposed on both sides of a light guide, wherein a polarization selective reflection layer is disposed between the light guide and the liquid crystal panel, and wherein the polarization selective reflection layer is disposed on both sides of the light guide. A liquid crystal display device, wherein the selective reflection layers have different polarization selectivities.
が形成され、前記第１基板の他面側に第２液晶層と第３
基板が形成された液晶表示装置において、前記第１基板
と前記第１液晶層、及び前記第１基板と前記第２液晶層
間に偏光選択反射層が積層され、さらに前記第１基板の
両側で前記偏光選択反射層が互いに異なる偏光選択性を
有することを特徴とする液晶表示装置。6. A first liquid crystal layer and a second substrate are formed on one side of the first substrate, and a second liquid crystal layer and a third liquid crystal layer are formed on the other side of the first substrate.
In a liquid crystal display device having a substrate formed thereon, a polarization selective reflection layer is laminated on the first substrate and the first liquid crystal layer, and between the first substrate and the second liquid crystal layer, and further on both sides of the first substrate. A liquid crystal display device, wherein the polarization selective reflection layers have different polarization selectivities.
れ、前記第１液晶パネルが、前記導光体側から第１偏光
選択反射層、第１液晶層、及び第２偏光選択反射層を有
し、さらに前記導光体の他面に第２液晶パネルが配置さ
れ、前記第２液晶パネルが、前記導光体側から第３偏光
選択反射層、第２液晶層、及び第４偏光選択反射層を有
するときに、前記第１偏光選択反射層と前記第３偏光選
択反射層が互いに異なる偏光選択性を有し、さらに前記
第１偏光選択反射層と前記第２偏光選択反射層、及び前
記第３偏光選択反射層と前記第４偏光選択反射層がそれ
ぞれ互いに異なる偏光選択性を有することを特徴とする
液晶表示装置。7. A first liquid crystal panel is disposed on one surface of a light guide, and the first liquid crystal panel is a first polarization selective reflection layer, a first liquid crystal layer, and a second polarization selective reflection layer from the light guide side. And a second liquid crystal panel is disposed on the other surface of the light guide, and the second liquid crystal panel is arranged from the light guide side to a third polarization selective reflection layer, a second liquid crystal layer, and a fourth polarization selective reflection layer. When having a reflection layer, the first polarization selective reflection layer and the third polarization selective reflection layer have different polarization selectivities, and further, the first polarization selective reflection layer and the second polarization selective reflection layer, and The liquid crystal display device, wherein the third polarization selective reflection layer and the fourth polarization selective reflection layer have different polarization selectivities.
第１偏光選択反射層、第１液晶層、第２偏光選択反射
層、及び第２基板が形成され、前記第１基板の他面側に
前記第１基板側から第３偏光選択反射層、第２液晶層、
第４偏光選択反射層、及び第３基板が形成された液晶表
示装置において、前記第１偏光選択反射層と前記第３偏
光選択反射層が互いに異なる偏光選択性を有し、さらに
前記第１偏光選択反射層と前記第２偏光選択反射層、及
び前記第３偏光選択反射層と前記第４偏光選択反射層が
それぞれ互いに異なる偏光選択性を有することを特徴と
する液晶表示装置。8. A method according to claim 1, wherein one side of the first substrate is provided from the first substrate side.
A first polarization selective reflection layer, a first liquid crystal layer, a second polarization selective reflection layer, and a second substrate are formed, and a third polarization selective reflection layer is formed on the other surface of the first substrate from the first substrate side. 2 liquid crystal layers,
In a liquid crystal display device having a fourth polarization selective reflection layer and a third substrate, the first polarization selective reflection layer and the third polarization selective reflection layer have different polarization selectivities, and the first polarization selective reflection layer has a different polarization selectivity. A liquid crystal display device, wherein the selective reflection layer and the second polarization selective reflection layer, and the third polarization selective reflection layer and the fourth polarization selective reflection layer have different polarization selectivities, respectively.
光選択性を有することを特徴とする請求項５から８のい
ずれかに記載の液晶表示装置。9. The liquid crystal display device according to claim 5, wherein the polarization selective reflection layer has polarization selectivity for circularly polarized light.
て偏光選択性を有することを特徴とする請求項５から８
のいずれかに記載の液晶表示装置。10. The polarization selective reflection layer has polarization selectivity with respect to linearly polarized light.
The liquid crystal display device according to any one of the above.
求項５、又は７記載の液晶表示装置。11. The liquid crystal display device according to claim 5, wherein a light source is provided on an end face of said light guide.
とを特徴とする請求項５、又は７記載の液晶表示装置。12. The liquid crystal display device according to claim 5, wherein a light source is provided in a part of the light guide.
請求項６、又は８記載の液晶表示装置。13. The liquid crystal display device according to claim 6, wherein a light source is provided on an end face of said first substrate.
ことを特徴とする請求項６、又は８記載の液晶表示装
置。14. The liquid crystal display device according to claim 6, wherein a light source is provided on a part of said first substrate.
表示装置と光路変更機構を含む立体視表示装置におい
て、前記液晶表示装置の両側の表示部がそれぞれ右目信
号と左目信号を表示し、前記光路変更機構により、前記
右目信号と前記左目信号が合成されることで立体視を行
う立体視表示装置。15. A stereoscopic display device including the liquid crystal display device according to claim 5 and an optical path changing mechanism, wherein display portions on both sides of the liquid crystal display device display a right eye signal and a left eye signal, respectively. A stereoscopic display device that performs stereoscopic vision by combining the right eye signal and the left eye signal by the optical path changing mechanism.
表示装置と光路変更機構を含む立体視表示装置におい
て、前記液晶表示装置の両側の表示部がそれぞれ右目信
号と左目信号を表示し、前記光路変更機構により、前記
右目信号と前記左目信号が別個にそれぞれ右目と左目に
入射することで立体視を行う立体視表示装置。16. A stereoscopic display device including the liquid crystal display device according to claim 5 and an optical path changing mechanism, wherein display portions on both sides of the liquid crystal display device display a right eye signal and a left eye signal, respectively. A stereoscopic display device that performs stereoscopic vision by separately entering the right eye signal and the left eye signal by the optical path changing mechanism.
表示装置と光路変更機構を含む立体視表示装置におい
て、前記液晶表示装置の両側の表示部がそれぞれ目の焦
点深度が異なる状態に対応する表示情報を表示し、前記
光路変更機構により前記表示情報を合成することで立体
視を行う立体視表示装置。17. A stereoscopic display device comprising the liquid crystal display device according to claim 5 and an optical path changing mechanism, wherein the display units on both sides of the liquid crystal display device have different focal depths of eyes. A stereoscopic display device that displays corresponding display information and performs stereoscopic viewing by combining the display information with the optical path changing mechanism.
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|---|---|---|---|
| JP2000386626A JP4119085B2 (en) | 2000-12-20 | 2000-12-20 | Liquid crystal display device and stereoscopic display device |
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| JP4119085B2 JP4119085B2 (en) | 2008-07-16 |
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