JP2003241175A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JP2003241175A JP2003241175A JP2002039502A JP2002039502A JP2003241175A JP 2003241175 A JP2003241175 A JP 2003241175A JP 2002039502 A JP2002039502 A JP 2002039502A JP 2002039502 A JP2002039502 A JP 2002039502A JP 2003241175 A JP2003241175 A JP 2003241175A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- film
- crystal display
- semi
- polarizing film
- 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.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電源ＯＮ時では液
晶が駆動し、画面として利用され、電源ＯＦＦ時の液晶
画面を有効利用した鏡面となる液晶表示素子に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display element in which a liquid crystal is driven when a power is turned on and is used as a screen, and which is a mirror surface which effectively uses the liquid crystal screen when the power is turned off.
【０００２】[0002]
【従来の技術】従来、液晶表示素子は、液晶を駆動し画
面を表示することを主体においている。透過型液晶表示
素子の場合、バックライトを用い、画面を表示する。こ
こ最近、情報の個人化にともない携帯電話の高性能化に
見られるように携帯性を重視した情報端末機器が急速に
発達している。情報端末機器において液晶は顔であり、
機器の大半の領域は液晶である。また、近年は従来の液
晶表示素子に比べ、さらに多機能性を追求した液晶表示
素子が求められている。図７に従来の透過型液晶表示素
子を示す。従来の透過型液晶表示素子は基板１ａ、ｂ間
に液晶層２を狭持させた液晶セル４と、その液晶セル４
の表面側には偏光フィルム３ａが貼合され、裏面側には
第２の偏光フィルム３ｂと、その下にはバックライト５
が設置されている。2. Description of the Related Art Conventionally, liquid crystal display elements have been mainly based on driving a liquid crystal to display a screen. In the case of a transmissive liquid crystal display element, a backlight is used to display a screen. Recently, with the personalization of information, information terminal devices that emphasize portability have been rapidly developed as seen in the improvement in performance of mobile phones. In information terminal equipment, the liquid crystal is the face,
Most areas of the device are liquid crystals. Further, in recent years, there has been a demand for a liquid crystal display element that pursues more versatility than the conventional liquid crystal display element. FIG. 7 shows a conventional transmissive liquid crystal display device. A conventional transmissive liquid crystal display device includes a liquid crystal cell 4 in which a liquid crystal layer 2 is sandwiched between substrates 1a and 1b, and the liquid crystal cell 4
The polarizing film 3a is attached to the front side of the, the second polarizing film 3b is provided on the back side, and the backlight 5 is provided below the second polarizing film 3b.
Is installed.
【０００３】従来の透過型液晶表示素子では、電源ＯＮ
時は液晶が駆動して画像が表示するが、電源ＯＦＦ時に
は画面に何も表示されない無効領域となる。特にコンパ
クト型（折畳式）機器では、コンパクトを閉じた状態で
は液晶画面は低消費電力化のため、電源ＯＦＦ状態とな
り、コンパクトを開いたときに電源ＯＮされるタイプ、
または操作することで電源ＯＮされ、画面表示されるタ
イプの機器が大半を占めている。In the conventional transmissive liquid crystal display device, the power is turned on.
At this time, the liquid crystal is driven to display an image, but when the power is turned off, the screen becomes an ineffective area where nothing is displayed on the screen. Especially in compact type (folding type) devices, the liquid crystal screen is in a power-off state when the compact is closed to reduce power consumption, and is turned on when the compact is opened.
Alternatively, most of the devices are of a type in which the power is turned on by operating and the screen is displayed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
場合電源ＯＮ時は液晶が駆動して画像を表示するが、電
源ＯＦＦ時には画面に何も表示されない。また、表面に
使用されている偏光フィルムはＡＲ（アンチリフレクシ
ョン）処理が施され表面反射を防止していることが多
く、表示時以外は画面が無効領域となるというような欠
点があった。However, in the above case, the liquid crystal is driven to display an image when the power is turned on, but nothing is displayed on the screen when the power is turned off. Further, the polarizing film used on the surface is often subjected to AR (anti-reflection) treatment to prevent surface reflection, and there is a drawback that the screen becomes an ineffective area except during display.
【０００５】そこで本発明は上記課題に鑑み、液晶セル
の表面側に配置された偏光フィルム上に反射と透過の機
能を有する半透過膜を配置することで、液晶セルの裏面
側の偏光フィルム下に配置されたバックライト光源から
光を入射させて表示する液晶表示素子において、電源Ｏ
Ｎ時には液晶画面として、そして電源ＯＦＦ時には鏡面
としての機能を付加することでこれまで無効であった表
示領域を有効利用した液晶表示素子を提供することにあ
る。Therefore, in view of the above problems, the present invention arranges a semi-transmissive film having a function of reflection and a transmission on a polarizing film arranged on the front surface side of a liquid crystal cell, whereby In a liquid crystal display device that displays light by making light incident from a backlight light source arranged in
It is to provide a liquid crystal display element that effectively utilizes a display area that has been ineffective until now by adding a function as a liquid crystal screen at N and a mirror surface at power off.
【０００６】[0006]
【課題を解決するための手段】この課題を解決するため
に本発明の液晶表示素子は、液晶セルの表面側に配置さ
れた偏光フィルム上に反射と透過の機能を有する半透過
膜を配置することである。In order to solve this problem, in the liquid crystal display element of the present invention, a semi-transmissive film having reflection and transmission functions is arranged on a polarizing film arranged on the surface side of a liquid crystal cell. That is.
【０００７】そのため、本発明は、一対の基板間に液晶
を封入してなる液晶セルと、液晶セルの表面側に配置さ
れた第１の偏光フィルムと、液晶セルの裏面側に配置さ
れた第２の偏光フィルムと、第２の偏光フィルムの裏面
側に配置されたバックライト光源と、からなり、液晶セ
ルの表面側に配置された第１の偏光フィルムの表面側
に、半透過膜を有することを特徴とする液晶表示素子で
ある。Therefore, in the present invention, a liquid crystal cell in which liquid crystal is sealed between a pair of substrates, a first polarizing film arranged on the front surface side of the liquid crystal cell, and a first polarizing film arranged on the rear surface side of the liquid crystal cell. No. 2 polarizing film and a backlight light source arranged on the back surface side of the second polarizing film, and has a semi-transmissive film on the front surface side of the first polarizing film arranged on the front surface side of the liquid crystal cell. A liquid crystal display element characterized by the above.
【０００８】また、本発明は、半透過膜の反射率Ｒが３
０％≦Ｒ≦７０％である半透過膜を備えることを特徴と
する液晶表示素子である。Further, according to the present invention, the reflectance R of the semitransparent film is 3
A liquid crystal display device comprising a semi-transmissive film with 0% ≦ R ≦ 70%.
【０００９】また、本発明は、半透過膜がＡｌまたはＡ
ｇまたはＡｇ合金を蒸着したフィルムからなる半透過膜
を備えることを特徴とする液晶表示素子である。Further, according to the present invention, the semi-transmissive film is made of Al or A.
A liquid crystal display device comprising a semi-transmissive film made of a film obtained by vapor deposition of g or Ag alloy.
【００１０】また、本発明は、半透過膜がＡｌまたはＡ
ｇまたはＡｇ合金を蒸着した側に少なくとも無機または
有機の透明樹脂膜を有する半透過膜を備えることを特徴
とする液晶表示素子である。Further, according to the present invention, the semi-permeable film is made of Al or A.
A liquid crystal display device comprising a semi-transmissive film having at least an inorganic or organic transparent resin film on the side on which g or Ag alloy is vapor-deposited.
【００１１】また、本発明は、半透過膜がＡｌまたはＡ
ｇまたはＡｇ合金を蒸着した側に少なくとも無機または
有機の透明増反射膜を多層に形成されている半透過膜を
備えることを特徴とする液晶表示素子である。Further, according to the present invention, the semitransparent film is Al or A.
A liquid crystal display device, comprising: a semi-transmissive film having at least an inorganic or organic transparent reflection-increasing film formed in multiple layers on the side on which g or Ag alloy is vapor-deposited.
【００１２】この本発明によれば、電源ＯＮ時には液晶
画面として、そして電源ＯＦＦ時には鏡面としての機能
を付加することでこれまで無効であった表示領域を有効
利用にし、より付加価値のある液晶表示素子を提供する
ことができる。According to the present invention, by adding a function as a liquid crystal screen when the power is turned on and as a mirror surface when the power is turned off, the display area, which has been ineffective until now, is effectively used, and a liquid crystal display having a higher added value is displayed. An element can be provided.
【００１３】[0013]
【発明の実施の形態】本発明は、一対の基板間に液晶を
封入した液晶セルと、液晶セルの表面側に配置された第
１の偏光フィルムと、液晶セルの裏面側に配置された第
２の偏光フィルムと、第２の偏光フィルム下に配置され
たバックライト光源とからなり、液晶セルの表面側に配
置された第１の偏光フィルム上に反射と透過の機能を有
する半透過膜が設けられていることを特徴とする液晶表
示素子であって、電源ＯＮ時には液晶画面として、そし
て電源ＯＦＦ時には鏡面として利用することができると
いう作用を有する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a liquid crystal cell in which liquid crystal is sealed between a pair of substrates, a first polarizing film arranged on the front surface side of the liquid crystal cell, and a first polarizing film arranged on the rear surface side of the liquid crystal cell. A polarizing film of No. 2 and a backlight light source arranged under the second polarizing film, and a semi-transmissive film having a function of reflection and transmission on the first polarizing film arranged on the surface side of the liquid crystal cell. A liquid crystal display element characterized by being provided, and has an effect that it can be used as a liquid crystal screen when the power is turned on and as a mirror surface when the power is turned off.
【００１４】また本発明は、半透過膜の反射率Ｔは３０
％≦Ｔ≦７０％であることを特徴とする液晶表示素子で
あって、電源ＯＮ時には液晶画面として、そして電源Ｏ
ＦＦ時には鏡面として利用することができるという作用
を有する。Further, according to the present invention, the reflectance T of the semi-transmissive film is 30.
A liquid crystal display device characterized by% ≤ T ≤ 70%, which is used as a liquid crystal screen when the power is turned on, and when the power is turned on.
It has the effect that it can be used as a mirror surface during FF.
【００１５】また本発明は、半透過膜はＡｌまたはＡ
ｇ、Ａｇ合金を蒸着したフィルムからなることを特徴と
する液晶表示素子であって、電源ＯＮ時には液晶画面と
して、そして電源ＯＦＦ時には鏡面として利用すること
ができるという作用を有する。In the present invention, the semi-transmissive film is made of Al or A.
A liquid crystal display element characterized by being formed of a film obtained by vapor deposition of g and Ag alloys, and has an effect that it can be used as a liquid crystal screen when the power is on and as a mirror surface when the power is off.
【００１６】また本発明は、半透過膜のＡｌまたはＡ
ｇ、Ａｇ合金の蒸着側に少なくとも無機もしくは有機の
透明樹脂膜を有することを特徴とする半透過膜を有する
液晶表示素子であって、電源ＯＮ時には液晶画面とし
て、電源ＯＦＦ時には鏡面として利用することができる
という作用を有する。The present invention also relates to a semi-permeable film of Al or A.
A liquid crystal display device having a semi-transmissive film characterized by having at least an inorganic or organic transparent resin film on the vapor deposition side of g and Ag alloys, which is used as a liquid crystal screen when the power is turned on and as a mirror surface when the power is turned off. It has the effect that
【００１７】また本発明は、半透過膜のＡｌはＡｇ、Ａ
ｇ合金の蒸着側に少なくとも無機または有機の透明増反
射膜が多層形成されていることを特徴とする半透過膜を
有する液晶表示素子であって、電源ＯＮ時には液晶画面
として、そして電源ＯＦＦ時には鏡面として利用するこ
とができるという作用を有する。In the present invention, Al in the semi-transmissive film is Ag, A
A liquid crystal display element having a semi-transmissive film, characterized in that at least an inorganic or organic transparent reflection-increasing film is formed on the vapor deposition side of a g-alloy, which is a liquid crystal screen when the power is on, and a mirror surface when the power is off. It has the effect that it can be used as.
【００１８】以下、本発明の実施の形態について、図１
を用いて説明する。FIG. 1 shows an embodiment of the present invention.
Will be explained.
【００１９】図１は本発明の液晶表示素子の断面構成を
示してある。FIG. 1 shows a sectional structure of a liquid crystal display element of the present invention.
【００２０】図１では、基板１ａ、ｂ間に液晶層２を狭
持させた液晶セル４と、その液晶セル４の表面側には偏
光フィルム３ａが貼合され、その上面には半透過膜６が
設けられ、裏面側には第２の偏光フィルム３ｂと、その
下にはバックライト５が設置されている。In FIG. 1, a liquid crystal cell 4 in which a liquid crystal layer 2 is sandwiched between substrates 1a and 1b, and a polarizing film 3a is pasted on the surface side of the liquid crystal cell 4, and a semitransparent film is formed on the upper surface thereof. 6 is provided, the second polarizing film 3b is provided on the back side, and the backlight 5 is provided below the second polarizing film 3b.
【００２１】以上の実施の形態のように、電源ＯＮ時に
は透過時色再現性を損なうことのない光学特性バランス
のとれた液晶画面として、電源ＯＦＦ時には反射率が高
く鏡として利用することができる機能を付加すること
で、これまで無効であった表示領域を有効利用でき、よ
り付加価値のある液晶表示素子を提供することができる
という作用を有する。上記実施の形態では、液晶セル４
の表面側に偏光フィルム３ａが貼合され、その上に反射
と透過の機能を有する半透過膜６を設けてバックライト
５が１５００ｃｄ／ｃｍ2の輝度上でパネル透過率を測
定したところ、透過率２．７％、色再現性範囲を示すＮ
ａｔｉｏｎａｌ ＴｅｌｅｖｉｓｉｏｎＳｙｓｔｅｍ
Ｃｏｍｍｉｔｅｅ（以下ＮＴＳＣと称す）比が３０％、
コントラストが８０であった。このとき電源ＯＦＦし、
反射率を測定したところ反射率５０％の鏡面であった。
ここでは、液晶セル４の裏面側に貼合した偏光フィルム
３ｂとして輝度向上偏光フィルム（日東電工社製ＰＣ
Ｆ）を使用すると、透過率４．２％、色再現性範囲を示
すＮＴＳＣ比が３２％、コントラスト８０となり、透過
率を向上することができた。液晶セル４の表面側に貼合
した半透過膜６はＡｌを１５ｎｍ蒸着したオレフィン系
フィルムを使用した。また、Ａｌを１０ｎｍ蒸着した半
透過膜６を偏光フィルム３ａに設けたパネルを作製した
ところ、透過率６．５％、色再現性範囲を示すＮＴＳＣ
比が３４％、コントラストが８０、電源ＯＦＦ時の反射
率は３０％となった。また、Ａｌを２５ｎｍ蒸着した半
透過膜６を偏光フィルム３ａに設けたパネルを作製した
ところ、透過率２．７％、色再現性範囲を示すＮＴＳＣ
比が２８％、コントラストが７０、電源ＯＦＦ時の反射
率は７０％となり、電源ＯＮ時には透過時色再現性を損
なうことのない光学特性バランスのとれた液晶画面とし
て、そして電源ＯＦＦ時には反射率が高く鏡として利用
することができる液晶表示素子が得られた。As in the above embodiment, the liquid crystal screen has a balanced optical characteristic that does not impair the color reproducibility during transmission when the power is on, and has a high reflectance when the power is off and can be used as a mirror. By adding the above, it is possible to effectively use a display area that has been ineffective until now, and it is possible to provide a liquid crystal display element having more added value. In the above embodiment, the liquid crystal cell 4
A polarizing film 3a is attached to the front side of the panel, a semi-transmissive film 6 having a function of reflection and transmission is provided thereon, and the backlight 5 has a panel transmittance measured at a luminance of 1500 cd / cm 2. Rate 2.7%, N showing color reproducibility range
national Television System
Commitee (hereinafter referred to as NTSC) ratio is 30%,
The contrast was 80. At this time, turn off the power,
When the reflectance was measured, it was a mirror surface with a reflectance of 50%.
Here, a brightness enhancement polarizing film (PC manufactured by Nitto Denko Corporation) is used as the polarizing film 3b attached to the back surface side of the liquid crystal cell 4.
When F) was used, the transmittance was 4.2%, the NTSC ratio showing the color reproducibility range was 32%, the contrast was 80, and the transmittance could be improved. As the semi-transmissive film 6 attached to the front surface side of the liquid crystal cell 4, an olefin-based film having 15 nm of Al deposited was used. Further, when a panel in which a semi-transmissive film 6 in which Al is vapor-deposited to 10 nm is provided on a polarizing film 3a is manufactured, NTSC showing a transmittance of 6.5% and a color reproducibility range is obtained.
The ratio was 34%, the contrast was 80, and the reflectance when the power was off was 30%. Further, when a panel in which a semi-transmissive film 6 having 25 nm of Al vapor deposited is provided on the polarizing film 3a, NTSC showing a transmittance of 2.7% and a color reproducibility range is obtained.
The ratio is 28%, the contrast is 70, the reflectance when the power is off is 70%, and when the power is on, the liquid crystal screen has a balanced optical characteristic that does not impair the color reproducibility during transmission, and when the power is off, the reflectance is high. Thus, a liquid crystal display device which can be used as a mirror is obtained.
【００２２】ところが、反射率が３０％未満のときは、
電源ＯＮ時透過時色再現性を損なうことのない光学特性
バランスのとれた液晶画面として利用できるが、電源Ｏ
ＦＦ時には反射率が低く、鏡として機能しない。また、
反射率が７０％を超えると逆に鏡としては利用できる
が、半透過膜を透過せず、液晶表示として機能しない。
上記のように、反射率を３０％から７０％の範囲に設定
すれば、液晶表示ができなおかつ反射時に鏡として利用
できる液晶表示素子を得ることができる。However, when the reflectance is less than 30%,
It can be used as a liquid crystal screen with well-balanced optical characteristics that does not impair the color reproducibility when the power is on.
At FF, the reflectance is low and it does not function as a mirror. Also,
On the contrary, when the reflectance exceeds 70%, it can be used as a mirror, but it does not pass through the semitransparent film and does not function as a liquid crystal display.
As described above, when the reflectance is set in the range of 30% to 70%, it is possible to obtain a liquid crystal display device which can perform liquid crystal display and can be used as a mirror during reflection.
【００２３】また、図３のように上記半透過膜６上に無
機もしくは有機の透明樹脂膜７を形成することで、信頼
性を確保できる上、半透過膜の腐食や酸化による、反射
率劣化やキズを防止でき、歩留り向上にもつながる。さ
らに、図４に示すように、Ａｌを１５ｎｍ蒸着した半透
過膜６上に無機または有機Ｓｉ系の透明増反射膜８を多
層形成してその特性を測定したところ、透過率が２．６
％、色再現性範囲を示すＮＴＳＣ比が３０％、コントラ
ストが７５となった。このとき電源ＯＦＦし、反射率を
測定したところ反射率６０％の鏡面となり、反射率を１
０％向上することができた。By forming an inorganic or organic transparent resin film 7 on the semi-transmissive film 6 as shown in FIG. 3, reliability can be ensured and reflectance deterioration due to corrosion or oxidation of the semi-transmissive film. It also prevents scratches and scratches and improves yield. Further, as shown in FIG. 4, when a multi-layered inorganic or organic Si-based transparent reflection-increasing film 8 was formed on the semi-transmissive film 6 on which Al was vapor-deposited with a thickness of 15 nm, and its characteristics were measured, the transmittance was 2.6.
%, The NTSC ratio showing the range of color reproducibility was 30%, and the contrast was 75. At this time, the power supply was turned off and the reflectance was measured. As a result, a mirror surface with a reflectance of 60% was obtained.
It was possible to improve by 0%.
【００２４】また、Ａｇを１５ｎｍ蒸着した半透過膜６
を形成時に、バックライト５が１５００ｃｄ／ｃｍ2の
輝度上でパネル透過率を測定したところ、透過率２％、
色再現性範囲を示すＮＴＳＣ比が３０％、コントラスト
が８０となった。このとき電源ＯＦＦし、反射率を測定
したところ反射率５８％の鏡面を得ることができた。A semi-transmissive film 6 in which Ag is vapor-deposited to a thickness of 15 nm
When the backlight 5 was formed, the panel transmittance was measured at a luminance of 1500 cd / cm 2 , and the transmittance was 2%.
The NTSC ratio showing the range of color reproducibility was 30%, and the contrast was 80. At this time, the power supply was turned off and the reflectance was measured. As a result, a mirror surface having a reflectance of 58% could be obtained.
【００２５】また、ＡｌまたはＡｇまたはＡｇ合金を蒸
着した半透過膜の代わりに、ＰＭＭＡ（ポリメチルメタ
アクリレート）とＰＣ（ポリカーボネート）とを積層し
たフィルムを偏光フィルムに貼合した、ＤＢＥＦ−Ｐ
（住友化学社製）を液晶セル４に貼合して、バックライ
ト５が１５００ｃｄ／ｃｍ2の輝度上でパネル透過率を
測定したところ、透過率８％、色再現性範囲を示すＮＴ
ＳＣ比が３０％、コントラストが８０となった。このと
き電源ＯＦＦし、反射率を測定したところ反射率５０％
の鏡面となり、透過率、コントラストが高く、透過時液
晶表示の見栄えがよく、電源ＯＦＦ時には鏡として利用
できる液晶表示素子を得ることができた。また、ＤＢＥ
Ｆ−Ｐ（住友化学社製）を液晶パネル４の表裏両面に貼
合することで、さらに透過率１５％、色再現性範囲を示
すＮＴＳＣ比が３０％、コントラストが１００となり、
反射率５０％の透過時の液晶表示特性をより向上するこ
とができた。Also, instead of the semi-transmissive film vapor-deposited of Al, Ag or Ag alloy, a film obtained by laminating PMMA (polymethylmethacrylate) and PC (polycarbonate) is laminated on a polarizing film, DBEF-P.
(Sumitomo Chemical Co., Ltd.) was attached to the liquid crystal cell 4, and the panel transmittance was measured with the backlight 5 at a brightness of 1500 cd / cm 2 , and the transmittance was 8%, and the color reproducibility range was NT.
The SC ratio was 30% and the contrast was 80. At this time, the power supply was turned off and the reflectance was measured.
Thus, it is possible to obtain a liquid crystal display device which has a high transmittance and a high contrast, has a good appearance of the liquid crystal display during transmission, and can be used as a mirror when the power is turned off. Also, DBE
By pasting FP (Sumitomo Chemical Co., Ltd.) on both front and back surfaces of the liquid crystal panel 4, the transmittance is 15%, the NTSC ratio showing the color reproducibility range is 30%, and the contrast is 100,
The liquid crystal display characteristics when transmitting with a reflectance of 50% could be further improved.
【００２６】上記のように、反射と透過の機能を有する
半透過膜６の反射率が３０％から７０％の範囲であれ
ば、電源ＯＮ時には透過時色再現性を損なうことのない
光学特性バランスのとれた液晶画面となり、さらに電源
ＯＦＦ時には反射率が高いことから鏡として利用するこ
とができる機能を付加することで、これまで無効であっ
た表示領域を有効利用でき、より付加価値のある液晶表
示素子を提供することができる。また、液晶セル４に貼
合された偏光フィルム３ｂに上記ＤＢＥＦ−Ｐ（住友化
学社製）、またはＰＣＦ（日東電工社製）を使用するこ
とでより透過率を向上することができ、見栄えのよい液
晶表示が得られ、なおかつ反射率が高く鏡として利用で
きる液晶表示素子を得ることができた。As described above, when the reflectance of the semi-transmissive film 6 having the functions of reflection and transmission is in the range of 30% to 70%, the balance of optical characteristics does not impair the color reproducibility during transmission when the power is turned on. The liquid crystal screen has a high resolution, and since the reflectance is high when the power is turned off, by adding a function that can be used as a mirror, the previously ineffective display area can be effectively used, and a liquid crystal with more added value A display element can be provided. Further, by using the above DBEF-P (manufactured by Sumitomo Chemical Co., Ltd.) or PCF (manufactured by Nitto Denko Corporation) for the polarizing film 3b attached to the liquid crystal cell 4, it is possible to further improve the transmittance and to make it look good. A good liquid crystal display was obtained, and a liquid crystal display element having a high reflectance and usable as a mirror could be obtained.
【００２７】なお、実施の形態では電源ＯＮ、ＯＦＦで
の表示について示したが、これはバックライト光源と液
晶パネルが電源ＯＮ時、透過型液晶表示でき、バックラ
イト光源の電源ＯＦＦ時、液晶パネルが電源ＯＮ、ＯＦ
Ｆどちらでも十分に鏡としての利用効果が得られる。と
くに、液晶パネルを黒表示にするとより鏡としての利用
効果をあげることができる。また、パッシブもしくはア
クティブマトリクス駆動のバックライトを有する透過型
もしくは半透過型液晶に用いることを前提として示して
いるが、これらに限定されるものではなく、偏光フィル
ムを用いないゲスト−ホスト方式やポリマー分散液晶方
式、さらにカラーフィルタを用いない積層方式の液晶表
示装置、自発光型有機ＥＬ（エレクトロルミネッセン
ス）にも反射と透過の機能を有する半透過膜を貼合する
ことで、パネルの電源ＯＮ、ＯＦＦつまり表示、無表示
により十分に同様の効果を得ることができる。In the embodiment, the display when the power source is turned on and off is shown. However, when the backlight light source and the liquid crystal panel are turned on, transmissive liquid crystal display can be performed, and when the backlight light source is turned off, the liquid crystal panel is displayed. Power on, OF
Both of F can sufficiently obtain the effect of use as a mirror. In particular, when the liquid crystal panel is displayed in black, the effect of using it as a mirror can be improved. Further, although it is shown on the premise that it is used for a transmissive or semi-transmissive liquid crystal having a passive or active matrix driving backlight, it is not limited to these, and a guest-host system or a polymer without a polarizing film is used. The power of the panel can be turned on by attaching a semi-transmissive film that has a function of reflection and transmission to a liquid crystal display device of a dispersion liquid crystal system, a laminated system that does not use a color filter, and a self-luminous organic EL (electroluminescence). The same effect can be sufficiently obtained by OFF, that is, by displaying or not displaying.
【００２８】[0028]
【発明の効果】以上のように本発明によれば、電源ＯＮ
時には透過時色再現性を損なうことのない光学特性バラ
ンスのとれた液晶画面として、電源ＯＦＦ時には反射率
が高いことから鏡として利用することができる機能を付
加することで、これまで無効であった表示領域を有効利
用でき、より付加価値のある液晶表示素子を容易に得る
ことができるという有利な効果がもたらされる。As described above, according to the present invention, the power is turned on.
It has been ineffective until now by adding a function that can be used as a mirror because it has a high reflectance when the power is off and as a liquid crystal screen with balanced optical characteristics that sometimes does not impair color reproducibility during transmission. The display region can be effectively used, and the advantageous effect that a liquid crystal display element with a higher added value can be easily obtained is brought about.
【図１】本発明の液晶表示素子の断面構成図FIG. 1 is a sectional configuration diagram of a liquid crystal display element of the present invention.
【図２】従来の透過型の液晶表示素子の断面構成図FIG. 2 is a sectional configuration diagram of a conventional transmissive liquid crystal display element.
【図３】本発明の一実施の形態における液晶表示素子の
断面構成図FIG. 3 is a sectional configuration diagram of a liquid crystal display element according to an embodiment of the present invention.
【図４】本発明の一実施の形態における液晶表示素子の
断面構成図FIG. 4 is a sectional configuration diagram of a liquid crystal display element according to an embodiment of the present invention.
１ａ 基板 １ｂ 基板 ２ 液晶層 ３ａ 第１の偏光フィルム ３ｂ 第２の偏光フィルム ４ 液晶セル ５ バックライト ６ 半透過膜 ７ 透明樹脂膜 ８ 透明増反射膜 1a substrate 1b substrate 2 Liquid crystal layer 3a First polarizing film 3b Second polarizing film 4 Liquid crystal cell 5 backlight 6 Semi-permeable membrane 7 Transparent resin film 8 Transparent reflective film
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H042 DA02 DA04 DA11 DA17 DA21 DB01 DB07 DC02 DE00 2H091 FA15X FB08 FC02 FC29 FC30 FD05 FD06 FD12 FD14 FD23 GA07 JA02 LA03 LA11 LA12 LA13 5C094 AA60 BA43 HA10 5G435 AA00 BB12 BB15 FF03 FF05 GG09 HH02 LL07 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 2H042 DA02 DA04 DA11 DA17 DA21 DB01 DB07 DC02 DE00 2H091 FA15X FB08 FC02 FC29 FC30 FD05 FD06 FD12 FD14 FD23 GA07 JA02 LA03 LA11 LA12 LA13 5C094 AA60 BA43 HA10 5G435 AA00 BB12 BB15 FF03 FF05 GG09 HH02 LL07
Claims (5)
セルと、前記液晶セルの表面側に配置された第１の偏光
フィルムと、前記液晶セルの裏面側に配置された第２の
偏光フィルムと、前記第２の偏光フィルムの裏面側に配
置されたバックライト光源と、からなり、前記液晶セル
の表面側に配置された前記第１の偏光フィルムの表面側
に、半透過膜を有することを特徴とする液晶表示素子。1. A liquid crystal cell in which a liquid crystal is sealed between a pair of substrates, a first polarizing film arranged on the front surface side of the liquid crystal cell, and a second polarizing film arranged on the back surface side of the liquid crystal cell. A polarizing film and a backlight light source arranged on the back surface side of the second polarizing film, and a semi-transmissive film on the front surface side of the first polarizing film arranged on the front surface side of the liquid crystal cell. A liquid crystal display device having.
７０％である半透過膜を備えることを特徴とする請求項
１に記載の液晶表示素子。2. The reflectance R of the semi-transmissive film is 30% ≦ R ≦
The liquid crystal display device according to claim 1, further comprising a semi-transmissive film having a thickness of 70%.
ｇ合金を蒸着したフィルムからなることを特徴とする請
求項１または２に記載の液晶表示素子。3. The semi-transparent film is Al, Ag or A
The liquid crystal display element according to claim 1 or 2, wherein the liquid crystal display element comprises a film obtained by vapor deposition of a g-alloy.
Ａｇ合金を蒸着した側に少なくとも無機または有機の透
明樹脂膜を有することを特徴とする請求項１から３のい
ずれかに記載の液晶表示素子。4. The liquid crystal display according to claim 1, wherein the semi-transmissive film has at least an inorganic or organic transparent resin film on a side on which Al, Ag, or an Ag alloy is vapor-deposited. element.
Ａｇ合金を蒸着した側に少なくとも無機または有機の透
明増反射膜を多層に形成されていることを特徴とする請
求項１から３のいずれかに記載の液晶表示素子。5. The semi-transmissive film is formed by forming at least an inorganic or organic transparent reflection-increasing film in multiple layers on a side on which Al, Ag, or an Ag alloy is vapor-deposited. The liquid crystal display element according to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002039502A JP2003241175A (en) | 2002-02-18 | 2002-02-18 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002039502A JP2003241175A (en) | 2002-02-18 | 2002-02-18 | Liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003241175A true JP2003241175A (en) | 2003-08-27 |
Family
ID=27780506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002039502A Pending JP2003241175A (en) | 2002-02-18 | 2002-02-18 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003241175A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005045481A1 (en) * | 2003-11-11 | 2005-05-19 | Koninklijke Philips Electronics N.V. | Mirror with built-in display |
| JP2008194978A (en) * | 2007-02-14 | 2008-08-28 | Kyocera Mita Corp | Image forming device |
| KR101408984B1 (en) * | 2012-12-06 | 2014-06-17 | 오디하이텍(주) | Liquid crystal panel assembly usable as mirror |
| WO2014112525A1 (en) | 2013-01-16 | 2014-07-24 | シャープ株式会社 | Mirror display, half mirror plate, and electronic device |
| US10012866B2 (en) | 2014-03-19 | 2018-07-03 | Sharp Kabushiki Kaisha | Mirror display and electronic device |
| US10054818B2 (en) | 2014-07-08 | 2018-08-21 | Sharp Kabushiki Kaisha | Mirror plate and mirror display |
| US10146093B2 (en) | 2015-03-20 | 2018-12-04 | Sharp Kabushiki Kaisha | Mirror display |
| US10146086B2 (en) | 2013-08-05 | 2018-12-04 | Sharp Kabushiki Kaisha | Mirror display, half mirror plate, and electronic device |
| US10148942B2 (en) | 2014-06-05 | 2018-12-04 | Sharp Kabushiki Kaisha | Mirror display system |
| US10254455B2 (en) | 2014-06-05 | 2019-04-09 | Sharp Kabushiki Kaisha | Mirror display and mirror display unit |
| CN111343448A (en) * | 2018-12-19 | 2020-06-26 | 卡西欧计算机株式会社 | Display device, display method, and recording medium |
-
2002
- 2002-02-18 JP JP2002039502A patent/JP2003241175A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7903335B2 (en) | 2003-11-11 | 2011-03-08 | Koninklijke Philips Electronics N.V. | Mirror with built-in display |
| WO2005045481A1 (en) * | 2003-11-11 | 2005-05-19 | Koninklijke Philips Electronics N.V. | Mirror with built-in display |
| JP2008194978A (en) * | 2007-02-14 | 2008-08-28 | Kyocera Mita Corp | Image forming device |
| KR101408984B1 (en) * | 2012-12-06 | 2014-06-17 | 오디하이텍(주) | Liquid crystal panel assembly usable as mirror |
| EP3370112A1 (en) | 2013-01-16 | 2018-09-05 | Sharp Kabushiki Kaisha | Mirror display |
| WO2014112525A1 (en) | 2013-01-16 | 2014-07-24 | シャープ株式会社 | Mirror display, half mirror plate, and electronic device |
| US9684204B2 (en) | 2013-01-16 | 2017-06-20 | Sharp Kabushiki Kaisha | Mirror display, half mirror plate, and electronic device |
| US10146086B2 (en) | 2013-08-05 | 2018-12-04 | Sharp Kabushiki Kaisha | Mirror display, half mirror plate, and electronic device |
| US10012866B2 (en) | 2014-03-19 | 2018-07-03 | Sharp Kabushiki Kaisha | Mirror display and electronic device |
| US10148942B2 (en) | 2014-06-05 | 2018-12-04 | Sharp Kabushiki Kaisha | Mirror display system |
| US10254455B2 (en) | 2014-06-05 | 2019-04-09 | Sharp Kabushiki Kaisha | Mirror display and mirror display unit |
| US10054818B2 (en) | 2014-07-08 | 2018-08-21 | Sharp Kabushiki Kaisha | Mirror plate and mirror display |
| US10146093B2 (en) | 2015-03-20 | 2018-12-04 | Sharp Kabushiki Kaisha | Mirror display |
| CN111343448A (en) * | 2018-12-19 | 2020-06-26 | 卡西欧计算机株式会社 | Display device, display method, and recording medium |
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