JP2001066593A - Liquid crystal display device and electronic instrument - Google Patents
Liquid crystal display device and electronic instrumentInfo
- Publication number
- JP2001066593A JP2001066593A JP23867899A JP23867899A JP2001066593A JP 2001066593 A JP2001066593 A JP 2001066593A JP 23867899 A JP23867899 A JP 23867899A JP 23867899 A JP23867899 A JP 23867899A JP 2001066593 A JP2001066593 A JP 2001066593A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- display device
- light
- light emitting
- 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.)
- Granted
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 102
- 239000000758 substrate Substances 0.000 claims abstract description 50
- 239000003086 colorant Substances 0.000 claims description 9
- 230000005684 electric field Effects 0.000 claims description 6
- 238000005401 electroluminescence Methods 0.000 claims description 2
- 239000010408 film Substances 0.000 description 14
- 238000000034 method Methods 0.000 description 9
- 239000007850 fluorescent dye Substances 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- -1 polyparaphenylene vinylene Polymers 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- KLCLIOISYBHYDZ-UHFFFAOYSA-N 1,4,4-triphenylbuta-1,3-dienylbenzene Chemical compound C=1C=CC=CC=1C(C=1C=CC=CC=1)=CC=C(C=1C=CC=CC=1)C1=CC=CC=C1 KLCLIOISYBHYDZ-UHFFFAOYSA-N 0.000 description 3
- ZMLPKJYZRQZLDA-UHFFFAOYSA-N 1-(2-phenylethenyl)-4-[4-(2-phenylethenyl)phenyl]benzene Chemical group C=1C=CC=CC=1C=CC(C=C1)=CC=C1C(C=C1)=CC=C1C=CC1=CC=CC=C1 ZMLPKJYZRQZLDA-UHFFFAOYSA-N 0.000 description 3
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229960000956 coumarin Drugs 0.000 description 3
- 235000001671 coumarin Nutrition 0.000 description 3
- 230000010365 information processing Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、液晶表示装置およ
び電子機器に関し、特に反射型表示、透過型表示の双方
が可能な液晶表示装置に関するものである。The present invention relates to a liquid crystal display device and an electronic apparatus, and more particularly to a liquid crystal display device capable of both a reflection type display and a transmission type display.
【０００２】[0002]
【従来の技術】従来、反射型液晶装置は、消費電力が小
さいために携帯機器や装置の付属的表示部等に多用され
ているが、外光を利用して表示を視認可能にしているた
め、暗い場所では表示を読みとることができないという
問題があった。このため、明るい場所では通常の反射型
液晶装置と同様に外光を利用するが、暗い場所では内部
の光源により表示を視認可能にした形式の液晶装置が提
案されている。これは、特開昭５７−４９２７１号公報
等に記載されているように、液晶パネルの観察側と反対
側の外面に偏光板、半透過反射板、バックライトを順次
配置した構成となっている。この液晶装置では、周囲が
明るい場合には外光を取り入れて半透過反射板にて反射
された光を利用して反射型表示を行い、周囲が暗くなる
とバックライトを点灯して半透過反射板を透過させた光
により表示を視認可能とした透過型表示を行う。2. Description of the Related Art Conventionally, reflection type liquid crystal devices have been frequently used in portable devices and auxiliary display units of the devices because of their low power consumption. However, there is a problem that the display cannot be read in a dark place. For this reason, there has been proposed a liquid crystal device of a type in which external light is used in a bright place similarly to a normal reflection type liquid crystal device, but in a dark place, the display can be visually recognized by an internal light source. As described in JP-A-57-49271, a polarizing plate, a transflective plate, and a backlight are sequentially arranged on the outer surface of the liquid crystal panel opposite to the observation side. . In this liquid crystal device, when the surroundings are bright, external light is taken in and reflective display is performed using light reflected by the semi-transmissive reflecting plate. When the surroundings are dark, the backlight is turned on and the semi-transmissive reflecting plate is turned on. A transmissive display in which the display can be visually recognized by the light transmitted through is provided.
【０００３】別の液晶装置としては、反射型表示の明る
さを向上させた特開平８−２９２４１３号公報に記載さ
れたものがある。この液晶装置は、液晶パネルの観察側
と反対側の外面に半透過反射板、偏光板、バックライト
を順次配置した構成をしている。周囲が明るい場合には
外光を取り入れて半透過反射板にて反射された光を利用
して反射型表示を行い、周囲が暗くなるとバックライト
を点灯して偏光板と半透過反射板を透過させた光により
表示を視認可能とした透過型表示を行う。このような構
成にすると、液晶パネルと半透過反射板の間に偏光板が
ないため、前述した液晶装置よりも明るい反射型表示が
得られる。As another liquid crystal device, there is one disclosed in Japanese Patent Application Laid-Open No. Hei 8-292413 in which the brightness of a reflective display is improved. This liquid crystal device has a configuration in which a transflective plate, a polarizing plate, and a backlight are sequentially arranged on the outer surface of the liquid crystal panel opposite to the observation side. When the surroundings are bright, external light is taken in and reflective display is performed using the light reflected by the semi-transmissive reflector. When the surroundings are dark, the backlight is turned on and the polarizing plate and the semi-transmissive reflector are transmitted. A transmissive display in which the display is visually recognizable by the applied light is performed. With such a configuration, since there is no polarizing plate between the liquid crystal panel and the transflective plate, a reflective display brighter than the liquid crystal device described above can be obtained.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
たような反射型表示、透過型表示の双方が可能な液晶表
示装置、いわゆる半透過型液晶表示装置は、使用環境が
明るい場合にも暗い場合にも視認が可能であるという長
所を持つ反面、バックライトの存在により装置全体の消
費電力が増大するという欠点を有していた。特に、この
種の半透過型液晶表示装置を携帯機器等の表示部に採用
する場合、電源容量にも限りがあるため、バックライト
の消費電力を極力低減し、液晶表示装置全体としてより
一層の低消費電力化を図ることが重要な課題となってい
た。However, a liquid crystal display device capable of performing both the reflection type display and the transmission type display as described above, that is, a so-called transflective type liquid crystal display device can be used in both bright and dark environments. Although it has the advantage of being able to be visually recognized, it has the disadvantage that the power consumption of the entire device increases due to the presence of the backlight. In particular, when this type of transflective liquid crystal display device is used in a display unit of a portable device or the like, since the power supply capacity is limited, the power consumption of the backlight is reduced as much as possible, and the entire liquid crystal display device is further improved. It has been an important issue to reduce power consumption.
【０００５】本発明は、上記の課題を解決するためにな
されたものであって、バックライトに要する消費電力を
低減でき、例えば携帯電子機器等の表示部に用いて好適
な半透過型液晶表示装置を提供することを目的とする。The present invention has been made to solve the above-mentioned problems, and can reduce the power consumption required for a backlight, and is suitable for a transflective liquid crystal display suitable for use in a display section of a portable electronic device or the like. It is intended to provide a device.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明の液晶表示装置は、一対の基板間に液晶層
が挟持されてなり、一対の基板のうちの一方の基板上
に、他方の基板側から入射された光を反射するとともに
他方の基板上の対向電極との間で液晶層に電界を印加す
る複数の反射電極が設けられた液晶表示装置であって、
一対の基板の外面側にエレクトロルミネッセンス素子
（Electroluminescence,以下、ＥＬ素子と略記する）が
配置され、複数の反射電極のうち、少なくとも一部の電
極に開口部が設けられ、開口部の位置に対応する領域に
エレクトロルミネッセンス素子の発光部が形成されたこ
とを特徴とするものである。In order to achieve the above object, a liquid crystal display device according to the present invention comprises a liquid crystal layer sandwiched between a pair of substrates, and a liquid crystal layer is provided on one of the pair of substrates. A liquid crystal display device provided with a plurality of reflective electrodes that reflect light incident from the other substrate side and apply an electric field to the liquid crystal layer between the counter electrode on the other substrate and
An electroluminescence element (hereinafter, abbreviated as EL element) is arranged on the outer surface side of the pair of substrates, and an opening is provided in at least a part of the plurality of reflective electrodes, corresponding to the position of the opening. The light emitting portion of the electroluminescent element is formed in a region where the light emission is performed.
【０００７】本発明の液晶表示装置における反射電極
は、他方の基板側から入射された光を反射すると同時に
他方の基板上の対向電極との間で液晶層に電界を印加す
るためのものであるが、反射電極の一部に開口部が設け
られ、一対の基板の外面側に位置するＥＬ素子から出射
された光が反射電極の開口部を通して液晶層を透過する
ように構成されている。つまり、本発明の液晶表示装置
は反射型表示と透過型表示を切り換えて表示することの
できる半透過型液晶表示装置である。The reflection electrode in the liquid crystal display device of the present invention reflects the light incident from the other substrate side and simultaneously applies an electric field to the liquid crystal layer between the reflection electrode and the counter electrode on the other substrate side. However, an opening is provided in a part of the reflective electrode, and light emitted from an EL element located on the outer surface side of the pair of substrates is transmitted through the liquid crystal layer through the opening of the reflective electrode. That is, the liquid crystal display device of the present invention is a transflective liquid crystal display device capable of switching between reflective display and transmissive display.
【０００８】しかしながら、従来のごく一般的な半透過
型液晶表示装置は、一対の基板の観察側と反対側の外面
（背面）に冷陰極管、導光板等を備えたバックライトを
配置し、冷陰極管等の光源から導光板を通じてバックラ
イトの全面から光を出射していた。However, a conventional and very common transflective liquid crystal display device has a backlight provided with a cold-cathode tube, a light guide plate, etc., on the outer surface (back surface) of the pair of substrates opposite to the observation side. Light was emitted from the entire surface of the backlight from a light source such as a cold cathode tube through a light guide plate.
【０００９】これに対して、本発明の液晶表示装置の場
合、冷陰極管、導光板等を備えた従来一般のバックライ
トに代えてＥＬ素子を用い、さらにはＥＬ素子の全面を
発光部とするのではなく、反射電極の開口部の下方のみ
に発光部（本明細書で言う「発光部」とは、ＥＬ素子の
発光源となる蛍光体を形成した領域と定義する）を設け
たものである。この構成によれば、反射電極の開口部下
方の最小限の領域に発光部を設ければ済むので、従来の
バックライトを用いた液晶表示装置に比べて消費電力を
低減することができる。ＥＬ素子は、製法上の理由か
ら、局所的に蛍光体を形成するのが比較的容易であり、
本発明の液晶表示装置のバックライトとして好適であ
る。On the other hand, in the case of the liquid crystal display device of the present invention, an EL element is used in place of a conventional general backlight having a cold cathode tube, a light guide plate, and the like. Rather, a light-emitting portion (the “light-emitting portion” in this specification is defined as a region where a phosphor serving as a light-emitting source of an EL element is formed) is provided only below an opening of a reflective electrode. It is. According to this configuration, it is sufficient to provide the light emitting section in a minimum area below the opening of the reflective electrode, so that power consumption can be reduced as compared with a conventional liquid crystal display device using a backlight. The EL element is relatively easy to locally form a phosphor for manufacturing reasons,
It is suitable as a backlight for the liquid crystal display device of the present invention.
【００１０】前記ＥＬ素子としては、有機ＥＬ素子を用
いることが好ましい。It is preferable to use an organic EL element as the EL element.
【００１１】なぜならば、ＥＬ素子の中でも、特に有機
ＥＬ素子は、例えば１０Ｖ以下の電圧で１００〜１００
０００cd/m２ 程度の輝度というように低電圧で高輝度
の発光が得られる、蛍光物質の種類の選択により青色か
ら赤色までのあらゆる可視光の発光が可能になる、とい
った利点があるからである。有機ＥＬ素子は、従来、低
分子系材料からなるホスト材料に対して蛍光色素を添加
したものを用い、真空蒸着法等により形成するのが一般
的であったが、本出願人は、これとは別に、高分子有機
化合物の前駆体と蛍光色素とを含む組成物を用い、この
組成物をインクジェット方式で基板上に噴出させ、パタ
ーン形成して有機ＥＬ素子を作製する技術を既に出願し
ている（特開平１１−５４２７０号公報参照）。本発明
における有機ＥＬ素子にはこの技術を応用することが可
能である。This is because, among the EL elements, particularly, the organic EL element is, for example, 100 to 100 at a voltage of 10 V or less.
This is because there are advantages that high-luminance light emission can be obtained at a low voltage such as a luminance of about 000 cd / m 2 , and that all kinds of visible light from blue to red can be emitted by selecting the type of fluorescent substance. . Conventionally, an organic EL element has generally been formed by using a host material made of a low-molecular material to which a fluorescent dye has been added, and by a vacuum deposition method or the like. Separately, using a composition containing a precursor of a high-molecular organic compound and a fluorescent dye, the composition is ejected onto a substrate by an ink jet method, and a technique for forming an organic EL element by patterning has already been applied for. (See Japanese Patent Application Laid-Open No. 11-54270). This technology can be applied to the organic EL device of the present invention.
【００１２】より具体的には、上記の前駆体として、ポ
リパラフェニレンビニレンまたはその誘導体の前駆体を
用いることができる。また、蛍光色素として、ローダミ
ンまたはその誘導体を用いれば赤色の発色光を得ること
ができる。キナクリドンまたはその誘導体を用いれば緑
色の発色光を得ることができる。ジスチリルビフェニル
またはその誘導体を用いれば青色の発色光を得ることが
できる。もしくは、クマリンまたはその誘導体、テトラ
フェニルブタジエンまたはその誘導体を用いても青色の
発色光を得ることができる。More specifically, as the above precursor, a precursor of polyparaphenylene vinylene or a derivative thereof can be used. When rhodamine or a derivative thereof is used as a fluorescent dye, red color light can be obtained. When quinacridone or a derivative thereof is used, green colored light can be obtained. When distyrylbiphenyl or a derivative thereof is used, blue colored light can be obtained. Alternatively, blue colored light can also be obtained using coumarin or a derivative thereof, or tetraphenylbutadiene or a derivative thereof.
【００１３】なお、上述したように、有機ＥＬ素子の発
光は輝度が高いため、例えば実際の発光源が点光源のよ
うなごく微細な面積であったとしても、実効的な発光面
積はその５〜２０倍程度にもなる。したがって、上で
「開口部の位置に対応する領域にＥＬ素子の発光部が形
成された」という表現を用いたが、開口部の位置や寸法
と発光部の位置や寸法を全く一致させても良いが、開口
部に対応する位置に発光部を形成しさえすれば、開口部
に対して発光部をかなり小さく形成しても、バックライ
トとして画面全域を照らすに充分な輝度を得ることがで
きる。As described above, since the light emitted from the organic EL element has a high luminance, even if the actual light emitting source has a very small area such as a point light source, the effective light emitting area is 5 times. About 20 times. Therefore, although the expression "the light emitting portion of the EL element is formed in the region corresponding to the position of the opening" is used above, even if the position and size of the opening and the position and size of the light emitting portion are completely matched. Good, but as long as the light emitting portion is formed at a position corresponding to the opening, even if the light emitting portion is formed relatively small with respect to the opening, it is possible to obtain sufficient brightness as a backlight to illuminate the entire screen. .
【００１４】前記反射電極に設ける開口部は、反射電極
上のいずれの位置に設けてもよいが、複数の反射電極と
対向電極とで規定される画素領域毎に開口部を設けると
よい。The opening provided in the reflection electrode may be provided at any position on the reflection electrode. However, it is preferable to provide an opening for each pixel region defined by a plurality of reflection electrodes and a counter electrode.
【００１５】この構成によれば、各画素領域に開口部、
すなわちＥＬ素子の発光部を設けることにより、表示画
面全体として見たときに輝度ムラが少なく、均一な明る
さを持つ画面とすることができる。According to this configuration, an opening is provided in each pixel region,
That is, by providing the light emitting portion of the EL element, a screen having less luminance unevenness and uniform brightness when viewed as a whole display screen can be obtained.
【００１６】また、画素領域毎に開口部を設ける場合、
画素領域毎に複数の開口部を設け、これら複数の開口部
に対応するＥＬ素子の各発光部がそれぞれ異なる色の光
を発光する構成とすることができる。When an opening is provided for each pixel region,
A plurality of openings may be provided for each pixel region, and each light-emitting portion of the EL element corresponding to the plurality of openings may emit light of a different color.
【００１７】上述したように、ＥＬ素子を有機ＥＬ素子
とした場合、添加する蛍光色素の種類を適宜選択するこ
とによって、赤、緑、青等、種々の色を持つ発光を得る
ことができる。したがって、例えば各画素領域毎に３つ
の開口部を設け、これら３つの開口部に対応して赤色光
用発光部、緑色光用発光部、青色光用発光部をそれぞれ
形成しておけば、透過光表示として用いる際に各発光部
を任意に駆動することにより様々な色のバックライト
（背景色）を得ることができる。As described above, when the EL element is an organic EL element, light having various colors such as red, green, and blue can be obtained by appropriately selecting the type of fluorescent dye to be added. Therefore, for example, if three openings are provided for each pixel region, and a red light emitting portion, a green light emitting portion, and a blue light emitting portion are formed corresponding to these three openings, respectively, When the light-emitting portions are arbitrarily driven when used for light display, backlights of various colors (background colors) can be obtained.
【００１８】さらに、一対の基板のいずれか一方にカラ
ーフィルター層を設けた場合、ＥＬ素子の各発光部から
発光される光の色と当該発光部に対応する領域における
カラーフィルター層の色を一致させた構成とするとよ
い。Further, when a color filter layer is provided on one of the pair of substrates, the color of light emitted from each light emitting portion of the EL element matches the color of the color filter layer in a region corresponding to the light emitting portion. It is good to make it the structure which made it.
【００１９】この構成によれば、光の利用効率が良くな
る。例えば、白色のバックライトを使う場合、カラーフ
ィルターによってその色以外の波長はカットされてしま
うが、光源がカラーフィルターの波長とほぼあった特性
であればカットされる波長がほとんど無くなり、効率が
良い。なお、上で「ＥＬ素子の各発光部からの発光色と
カラーフィルター層の色を一致させる」と記載したが、
これは分光特性を完全に一致させるという意味ではな
く、例えば赤なら赤、緑なら緑というようにほぼ同じ色
に合わせるという意味である。According to this configuration, the light use efficiency is improved. For example, when using a white backlight, wavelengths other than the color are cut off by the color filter, but if the light source has characteristics that are almost the same as the wavelength of the color filter, there is almost no cut-off wavelength, resulting in high efficiency. . Note that, above, "the color of the light emitted from each light emitting portion of the EL element and the color of the color filter layer are matched",
This does not mean that the spectral characteristics are completely matched, but that they are almost the same color, such as red for red and green for green.
【００２０】液晶表示装置の画素領域毎に開口部を設け
た場合、その開口部に対応して複数の発光部が存在する
ことになるが、そのうちの一部の発光部を用いると、Ｅ
Ｌ素子を任意の形状に発光させることができる。When an opening is provided for each pixel region of the liquid crystal display device, there are a plurality of light emitting portions corresponding to the openings.
The L element can emit light in any shape.
【００２１】すなわち、本発明の液晶表示装置は、全面
から光が出射されるバックライトを備えたわけではな
く、バックライトとなるＥＬ素子の発光部を表示画面内
に複数設けた構成である。したがって、全ての発光部を
一様に駆動すれば、実質的に全面が発光するバックライ
トを構成できるし、複数の発光部の中で任意の一部の発
光部のみを駆動するように駆動方法を工夫すれば、通常
の表示とは別にバックライトとして所望の文字や絵柄等
を明るく浮かび上がらせることができ、装飾性に優れた
液晶表示装置を実現することもできる。That is, the liquid crystal display device of the present invention does not include a backlight from which light is emitted from the entire surface, but has a structure in which a plurality of light emitting portions of EL elements serving as a backlight are provided in a display screen. Therefore, if all the light-emitting units are driven uniformly, a backlight that emits light over substantially the entire surface can be formed, and a driving method that drives only an arbitrary part of the plurality of light-emitting units is used. By devising the above, desired characters and pictures can be brightly emerged as a backlight separately from a normal display, and a liquid crystal display device with excellent decorativeness can be realized.
【００２２】本発明の電子機器は、上記本発明の液晶表
示装置を備えたことを特徴とするものである。An electronic apparatus according to the present invention includes the liquid crystal display device according to the present invention.
【００２３】本発明の電子機器においては、本発明の液
晶表示装置を備えたことにより、バックライト部分に要
する消費電力を低減することができ、高効率の電子機器
を実現することができる。In the electronic device of the present invention, the provision of the liquid crystal display device of the present invention makes it possible to reduce the power consumption required for the backlight portion, thereby realizing a highly efficient electronic device.
【００２４】[0024]
【発明の実施の形態】［第１の実施の形態］以下、本発
明の第１の実施の形態を図１および図２を参照して説明
する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS.
【００２５】図１は本実施の形態の液晶表示装置１の各
画素領域を示す平面図、図２は図１のＡ−Ａ’線に沿う
断面図である。なお、ここでは図示の都合上、縦横３本
ずつの電極しか示していないが、実際の液晶表示装置で
はより多くの電極が設けられている。FIG. 1 is a plan view showing each pixel region of the liquid crystal display device 1 of the present embodiment, and FIG. 2 is a cross-sectional view taken along the line AA 'in FIG. Here, for convenience of illustration, only three vertical and horizontal electrodes are shown, however, more electrodes are provided in an actual liquid crystal display device.
【００２６】本実施の形態はパッシブマトリックスＳＴ
Ｎ（Super Twisted Nematic）型液晶表示装置の例であ
り、図２に示すように、液晶パネル部２の前面側および
背面側に、位相差板３，４、偏光板５，６が配置された
周知の構成となっている。そして、液晶パネル部２の背
面側の偏光板６の外方にバックライトとして機能する有
機ＥＬ素子７が配置されている。In this embodiment, the passive matrix ST
This is an example of an N (Super Twisted Nematic) type liquid crystal display device. As shown in FIG. 2, retardation plates 3 and 4 and polarizing plates 5 and 6 are disposed on the front and back sides of a liquid crystal panel unit 2. It has a well-known configuration. An organic EL element 7 functioning as a backlight is disposed outside the polarizing plate 6 on the back side of the liquid crystal panel unit 2.
【００２７】液晶パネル部２は、例えばガラス基板等か
らなる第１の基板８と第２の基板９（一対の基板）とが
対向配置され、その間に液晶層１０が挟持されている。
第１の基板８の第２の基板９と対向する対向面上に、ア
ルミニウム膜等の高反射率の金属膜からなる反射電極１
１が、図１に示すように直線状に並行して複数形成され
ている。In the liquid crystal panel section 2, a first substrate 8 and a second substrate 9 (a pair of substrates) made of, for example, a glass substrate are arranged to face each other, and a liquid crystal layer 10 is sandwiched therebetween.
A reflection electrode 1 made of a metal film having a high reflectance such as an aluminum film is provided on a facing surface of a first substrate 8 facing a second substrate 9.
1 are formed in parallel in a straight line as shown in FIG.
【００２８】一方、第２の基板９の第１の基板８と対向
する対向面上には、ＩＴＯ（IndiumTin Oxide）等の透
明導電膜からなる対向電極１２が、図１に示すように直
線状に並行して複数形成されている（図１において対向
電極１２は２点鎖線で示す）。これら第１の基板８上の
反射電極１１と第２の基板９上の対向電極１２とは互い
に交差して格子状となるように配置されており、各反射
電極１１と各対向電極１２との交差部分が１つの画素領
域１３となっている。On the other hand, an opposing electrode 12 made of a transparent conductive film such as ITO (Indium Tin Oxide) is linearly formed on the opposing surface of the second substrate 9 opposing the first substrate 8 as shown in FIG. (In FIG. 1, the counter electrode 12 is shown by a two-dot chain line). The reflective electrode 11 on the first substrate 8 and the opposing electrode 12 on the second substrate 9 are arranged so as to intersect each other and form a lattice. The intersection part is one pixel area 13.
【００２９】第１の基板８および第２の基板９の表示領
域に対応する部分の対向面上には、反射電極１１上およ
び対向電極１２上を覆うように配向膜１４，１５がそれ
ぞれ形成されており、所定方向にラビング処理が施され
ている。さらに、第１の基板８と第２の基板９との間に
は、所定の寸法を有する複数のギャップ材（図示せず）
が分散して配置され、それにより液晶パネル部２のセル
ギャップが一定に保持されている。また、第１の基板８
および第２の基板９の対向面の縁部にはシール材１６が
配置され、シール材１６により封止された第１の基板８
と第２の基板９との間にＳＴＮ型液晶が封入されて液晶
層１０が形成され、液晶パネル部２が構成されている。Alignment films 14 and 15 are formed on the opposing surfaces of the portions corresponding to the display areas of the first substrate 8 and the second substrate 9 so as to cover the reflective electrode 11 and the opposing electrode 12, respectively. And a rubbing process is performed in a predetermined direction. Further, a plurality of gap members (not shown) having predetermined dimensions are provided between the first substrate 8 and the second substrate 9.
Are dispersedly arranged, so that the cell gap of the liquid crystal panel unit 2 is kept constant. Also, the first substrate 8
A sealing material 16 is disposed at an edge of the facing surface of the second substrate 9, and the first substrate 8 sealed with the sealing material 16 is provided.
The liquid crystal layer 10 is formed by enclosing STN type liquid crystal between the substrate and the second substrate 9, thereby forming the liquid crystal panel section 2.
【００３０】以下の構成が本発明の最大の特徴点であ
り、第１の基板８上の各反射電極１１には、画素領域１
３毎に２個ずつのスリット１７（開口部）が形成されて
いる。スリット１７は反射電極１１をなすアルミニウム
膜を厚さ方向に貫通しており、この部分は光を透過する
ようになっている。なお、スリット１７の面積は液晶層
１０への電界印加に悪影響を及ぼさない程度の大きさに
設定される必要がある。そして、液晶パネル部２の背面
側に配置された有機ＥＬ素子７は、反射電極１１のスリ
ット１７が形成された位置に対応して発光部１８が設け
られている。The following configuration is the most significant feature of the present invention. Each reflective electrode 11 on the first substrate 8 has a pixel region 1
Two slits 17 (openings) are formed for every three. The slit 17 penetrates through the aluminum film forming the reflective electrode 11 in the thickness direction, and this portion transmits light. The area of the slit 17 needs to be set to a size that does not adversely affect the application of an electric field to the liquid crystal layer 10. The organic EL element 7 arranged on the back side of the liquid crystal panel section 2 is provided with a light emitting section 18 corresponding to the position where the slit 17 of the reflective electrode 11 is formed.
【００３１】有機ＥＬ素子７自体の構成は、一対のガラ
ス基板１９，２０が対向配置され、下側のガラス基板１
９の対向面上にアルミニウム膜等からなる反射電極２１
が設けられ、上側のガラス基板２０の対向面上にはＩＴ
Ｏ等からなる透明電極２２が設けられている。２枚のガ
ラス基板１９，２０間は、発光部１８以外の領域には光
遮断層とインクジェット法により有機発光層を形成する
際のインク垂れ防止用の隔壁とを兼ねた樹脂ブラックレ
ジストからなる壁部２３が形成され、壁部２３と壁部２
３の間（発光部１８となる領域）に蛍光色素を含有した
ポリパラフェニレンビニレンまたはその誘導体の前駆体
等が充填されて有機発光層２４が形成されている。また
図示は省略するが、実際には有機発光層２４と反射電極
２１との間にアルミニウムキノリノール錯体等からなる
電子輸送層が形成されている。The configuration of the organic EL element 7 itself is such that a pair of glass substrates 19 and 20 are arranged to face each other and the lower glass substrate 1
9, a reflection electrode 21 made of an aluminum film or the like on the opposing surface
Is provided, and an IT
A transparent electrode 22 made of O or the like is provided. Between the two glass substrates 19 and 20, in a region other than the light emitting portion 18, a wall made of a resin black resist which also serves as a light blocking layer and a partition for preventing ink dripping when an organic light emitting layer is formed by an inkjet method. The wall 23 and the wall 2 are formed.
The organic light emitting layer 24 is formed by filling a polyparaphenylene vinylene or a derivative of a derivative thereof containing a fluorescent dye or the like in a space between the light emitting portions 3 (a region to be the light emitting portion 18). Although not shown, an electron transport layer made of an aluminum quinolinol complex or the like is actually formed between the organic light emitting layer 24 and the reflective electrode 21.
【００３２】平面的に見ると、本実施の形態では、図１
に示すように、発光部１８（破線で示す）はスリット１
７よりも若干大きく形成されているが、発光部１８とス
リット１７の大きさは全く一致していても良いし、逆に
発光部１８がスリット１７よりも小さく形成されていて
も良い。いずれにしても、液晶表示装置１全体の全ての
発光部１８の面積の合計が表示領域の面積の１／２０〜
１／５程度あれば、表示領域全域を照らすのに充分足り
る。In a plan view, in this embodiment, FIG.
As shown in the figure, the light emitting unit 18 (shown by a broken line) is
7, the size of the light emitting portion 18 and the size of the slit 17 may be completely the same, or conversely, the size of the light emitting portion 18 may be smaller than the size of the slit 17. In any case, the sum of the areas of all the light emitting units 18 of the entire liquid crystal display device 1 is 1/20 to the area of the display area.
About 1/5 is enough to illuminate the entire display area.
【００３３】本実施の形態の液晶表示装置１において
は、周囲が明るい状況では、第２の基板９側から入射さ
れた光を反射電極１１で反射させて反射型表示を行うこ
とができ、周囲が暗い状況では第１の基板８の背面側に
配置された有機ＥＬ素子７から出射させた光を反射電極
１１のスリット１７を通して液晶層１０を透過させて透
過型表示を行うことができる。この際、本実施の形態の
液晶表示装置１の場合、冷陰極管、導光板等を備えた従
来一般のバックライトとは異なり、有機ＥＬ素子７をバ
ックライトに用い、さらには反射電極１１のスリット１
７の下方のみに発光部１８を設けたため、従来のバック
ライトを用いた液晶表示装置に比べて消費電力を低減す
ることができる。In the liquid crystal display device 1 of the present embodiment, when the surroundings are bright, light incident from the second substrate 9 side is reflected by the reflective electrode 11 so that a reflective display can be performed. In a dark state, light emitted from the organic EL element 7 disposed on the back side of the first substrate 8 can be transmitted through the liquid crystal layer 10 through the slit 17 of the reflective electrode 11 to perform transmissive display. At this time, in the case of the liquid crystal display device 1 of the present embodiment, unlike a conventional general backlight including a cold cathode tube, a light guide plate, and the like, the organic EL element 7 is used for the backlight, and Slit 1
Since the light emitting section 18 is provided only below the light emitting device 7, power consumption can be reduced as compared with a conventional liquid crystal display device using a backlight.
【００３４】また特にＥＬ素子として有機ＥＬ素子７を
用いたため、低電圧で高輝度の発光が得られる、蛍光物
質の種類の選択により青色から赤色までのあらゆる可視
光の発光が可能になる、といった利点も得ることができ
る。In particular, since the organic EL element 7 is used as the EL element, high-luminance light emission can be obtained at a low voltage, and all kinds of visible light from blue to red can be emitted by selecting the type of fluorescent substance. Benefits can also be obtained.
【００３５】さらに、各反射電極１１の画素領域１３毎
に２つずつのスリット１７を設け、各スリット１７に有
機ＥＬ素子７の発光部１８を設けたため、表示画面全体
として見たときに輝度ムラが少なく、均一な明るさを持
つ画面とすることができる。Further, since two slits 17 are provided for each pixel region 13 of each reflective electrode 11 and the light emitting portion 18 of the organic EL element 7 is provided in each slit 17, luminance unevenness when viewed as a whole display screen. Screen with less brightness and uniform brightness.
【００３６】［第２の実施の形態］以下、本発明の第２
の実施の形態を図３および図４を参照して説明する。[Second Embodiment] Hereinafter, a second embodiment of the present invention will be described.
Will be described with reference to FIGS. 3 and 4. FIG.
【００３７】図３は本実施の形態の液晶表示装置３０の
各画素領域を示す平面図、図４は図３のＢ−Ｂ’線に沿
う断面図である。FIG. 3 is a plan view showing each pixel region of the liquid crystal display device 30 of the present embodiment, and FIG. 4 is a cross-sectional view taken along the line BB 'in FIG.
【００３８】本実施の形態の構成は第１の実施の形態と
ほぼ同様であり、反射電極に形成した開口部周辺の構成
が異なるのみである。よって、図３および図４において
図１および図２と共通の構成要素については同一の符号
を付し、詳細な説明は省略する。The configuration of this embodiment is almost the same as that of the first embodiment, except for the configuration around the opening formed in the reflection electrode. Therefore, in FIGS. 3 and 4, the same reference numerals are given to the same components as those in FIGS. 1 and 2, and the detailed description will be omitted.
【００３９】第１の実施の形態では反射電極がアルミニ
ウム膜１層のみで構成され、反射電極を貫通するスリッ
トが形成されていたが、本実施の形態では、図３に示す
ように、アルミニウム膜からなる反射電極３１の各画素
領域１３の中央に矩形状の開口部３２が形成されてい
る。このように、本実施の形態では開口部３２の面積が
大きいため、アルミニウム膜の反射電極３１の１層のみ
では開口部３２のところで液晶層１０の電界が乱れてし
まう。そこで、図４に示すように、アルミニウム膜の反
射電極３１の下にＩＴＯ等の透明導電膜からなる下部電
極３３を設け、反射電極３１の開口部３２では下部電極
３３が露出する構成とした。この構成により、液晶層１
０への電界の印加に支障がなくなると同時に、有機ＥＬ
素子７からの出射光は透明な下部電極３３中を透過す
る。In the first embodiment, the reflective electrode is formed of only one layer of the aluminum film, and the slit penetrating the reflective electrode is formed. However, in the present embodiment, as shown in FIG. A rectangular opening 32 is formed at the center of each pixel region 13 of the reflective electrode 31 made of. As described above, in this embodiment, since the area of the opening 32 is large, the electric field of the liquid crystal layer 10 is disturbed at the opening 32 with only one layer of the reflective electrode 31 made of an aluminum film. Therefore, as shown in FIG. 4, a lower electrode 33 made of a transparent conductive film such as ITO is provided below the reflective electrode 31 of the aluminum film, and the lower electrode 33 is exposed in the opening 32 of the reflective electrode 31. With this configuration, the liquid crystal layer 1
At the same time that the application of an electric field to
Light emitted from the element 7 passes through the transparent lower electrode 33.
【００４０】そして、本実施の形態の場合も、反射電極
３１の開口部３２に相当する位置に有機ＥＬ素子７の発
光部１８が形成されている。図３に示すように、発光部
１８（破線で示す）は開口部３２よりも若干大きく形成
されているが、発光部１８と開口部３２の大きさは全く
一致していても良いし、逆に発光部１８が開口部３２よ
りも小さく形成されていても良い。この点は、第１の実
施の形態と同様である。Also in the case of the present embodiment, the light emitting portion 18 of the organic EL element 7 is formed at a position corresponding to the opening 32 of the reflection electrode 31. As shown in FIG. 3, the light emitting section 18 (shown by a broken line) is formed slightly larger than the opening 32, but the size of the light emitting section 18 and the opening 32 may be exactly the same, or vice versa. The light emitting section 18 may be formed smaller than the opening 32. This is the same as in the first embodiment.
【００４１】本実施の形態の場合も、消費電力の低減が
図れ、輝度ムラの少ない半透過型液晶表示装置が得られ
る、という第１の実施の形態と同様の効果を奏すること
ができる。Also in the case of the present embodiment, it is possible to achieve the same effect as in the first embodiment in that the power consumption can be reduced and a transflective liquid crystal display device with less luminance unevenness can be obtained.
【００４２】［第３の実施の形態］以下、本発明の第３
の実施の形態を図５および図６を参照して説明する。[Third Embodiment] Hereinafter, a third embodiment of the present invention will be described.
Will be described with reference to FIGS. 5 and 6. FIG.
【００４３】図５は本実施の形態の液晶表示装置４０の
各画素領域を示す平面図、図６は図５のＣ−Ｃ’線に沿
う断面図である。FIG. 5 is a plan view showing each pixel region of the liquid crystal display device 40 of the present embodiment, and FIG. 6 is a cross-sectional view taken along line CC 'of FIG.
【００４４】本実施の形態の構成は有機ＥＬ素子におけ
る複数の発光部で有機発光層に添加する蛍光色素の種類
を変えたものであり、バックライトの色が変えられる例
を示している。本実施の形態も、図５および図６におい
て図１および図２と共通の構成要素については同一の符
号を付し、その部分の詳細な説明は省略する。The configuration of the present embodiment changes the kind of the fluorescent dye added to the organic light emitting layer in a plurality of light emitting portions in the organic EL element, and shows an example in which the color of the backlight can be changed. Also in the present embodiment, in FIGS. 5 and 6, the same components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description of those portions is omitted.
【００４５】本実施の形態においては、第１の基板８上
の各反射電極１１には、各画素領域１３毎に３個ずつの
スリット１７（開口部）が形成されており、有機ＥＬ素
子７は反射電極１１のスリット１７が形成された位置に
対応して、すなわち各画素領域１３毎に３個ずつの発光
部１８ｒ，１８ｇ，１８ｂが設けられている。In the present embodiment, each of the reflective electrodes 11 on the first substrate 8 is formed with three slits 17 (openings) for each pixel region 13. Corresponds to the position where the slit 17 of the reflective electrode 11 is formed, that is, three light-emitting portions 18 r, 18 g, and 18 b are provided for each pixel region 13.
【００４６】有機ＥＬ素子の基本的な構成は第１の実施
の形態と同様であるが、各画素領域１３の３個の発光部
１８ｒ，１８ｇ，１８ｂにおいて有機発光層の材料が一
様ではなく、ポリパラフェニレンビニレンまたはその誘
導体の前駆体に添加される蛍光色素がそれぞれ異なって
いる。本実施の形態の場合、例えば各画素領域１３の３
個の発光部１８ｒ，１８ｇ，１８ｂのうち、左側の発光
部１８ｒにローダミンまたはその誘導体が添加され、中
央の発光部１８ｇにキナクリドンまたはその誘導体が添
加され、右側の発光部１８ｂにはジスチリルビフェニル
またはその誘導体、クマリンまたはその誘導体、テトラ
フェニルブタジエンまたはその誘導体のいずれかが添加
されている。ローダミンまたはその誘導体は赤色光を発
光する作用を有しているため、左側の発光部１８ｒは赤
色光用発光部となり、キナクリドンまたはその誘導体は
緑色光を発光する作用を有しているため、中央の発光部
１８ｇは緑色光用発光部となり、ジスチリルビフェニル
またはその誘導体、クマリンまたはその誘導体、テトラ
フェニルブタジエンまたはその誘導体などは青色光を発
光する作用を有しているため、右側の発光部１８ｂは青
色光用発光部となる。Although the basic structure of the organic EL element is the same as that of the first embodiment, the material of the organic light emitting layer is not uniform in the three light emitting portions 18r, 18g and 18b of each pixel region 13. The fluorescent dye added to the precursor of polyparaphenylenevinylene or a derivative thereof is different from each other. In the case of the present embodiment, for example, 3 of each pixel region 13
Of the light emitting portions 18r, 18g and 18b, rhodamine or a derivative thereof is added to the left light emitting portion 18r, quinacridone or a derivative thereof is added to the central light emitting portion 18g, and distyrylbiphenyl is added to the right light emitting portion 18b. Alternatively, one of a derivative thereof, coumarin or a derivative thereof, and tetraphenylbutadiene or a derivative thereof is added. Since rhodamine or a derivative thereof has a function of emitting red light, the left light emitting portion 18r serves as a light emitting portion for red light, and quinacridone or a derivative thereof has a function of emitting green light. The light-emitting portion 18b of the right side is a green light-emitting portion, and distyrylbiphenyl or a derivative thereof, coumarin or a derivative thereof, tetraphenylbutadiene or a derivative thereof has a function of emitting blue light, and therefore, the right light-emitting portion 18b Is a light emitting section for blue light.
【００４７】本実施の形態の液晶表示装置４０の場合、
反射型表示として用いる場合には一様の背景色である
が、各画素領域１３毎に３つのスリット１７が設けら
れ、これら３つのスリット１７に対応して赤色光用発光
部１８ｒ、緑色光用発光部１８ｇ、青色光用発光部１８
ｂがそれぞれ形成されているため、透過光表示として用
いる際には各発光部１８ｒ，１８ｇ，１８ｂを独立して
任意に駆動することにより有機ＥＬ素子７から出射され
る光が赤、緑、青、またはその他の色というように色が
変わり、様々な背景色の画面を得ることができる。In the case of the liquid crystal display device 40 of the present embodiment,
When used as a reflective display, it has a uniform background color, but three slits 17 are provided for each pixel region 13, and a red light emitting portion 18 r and a green light Light emitting part 18g, light emitting part 18 for blue light
Since each of the light emitting portions 18r, 18g, and 18b is independently and arbitrarily driven when used for transmitted light display, light emitted from the organic EL element 7 is red, green, and blue. Or other colors, so that screens with various background colors can be obtained.
【００４８】［第４の実施の形態］以下、本発明の第４
の実施の形態を図７および図８を参照して説明する。[Fourth Embodiment] Hereinafter, a fourth embodiment of the present invention will be described.
Will be described with reference to FIGS. 7 and 8. FIG.
【００４９】図７は本実施の形態の液晶表示装置５０の
各画素領域を示す平面図、図８は図７のＤ−Ｄ’線に沿
う断面図である。FIG. 7 is a plan view showing each pixel region of the liquid crystal display device 50 of the present embodiment, and FIG. 8 is a sectional view taken along the line DD 'of FIG.
【００５０】第３の実施の形態で有機ＥＬ素子の複数の
発光部で有機発光層に添加する蛍光色素の種類を変え、
バックライトの色が変えられる例を示したが、本実施の
形態はその構成にカラーフィルターを付加し、半透過型
カラー液晶表示装置とした例である。よって、図７およ
び図８において図５および図６と共通の構成要素につい
ては同一の符号を付し、その部分の詳細な説明は省略す
る。In the third embodiment, the kind of the fluorescent dye added to the organic light emitting layer is changed in a plurality of light emitting portions of the organic EL element.
Although an example in which the color of the backlight can be changed has been described, the present embodiment is an example in which a color filter is added to the configuration to obtain a transflective color liquid crystal display device. Therefore, in FIGS. 7 and 8, the same reference numerals are given to the same components as those in FIGS. 5 and 6, and detailed description of those portions will be omitted.
【００５１】本実施の形態の場合、第２の基板９の第１
の基板８と対向する対向面上には、例えば樹脂ブラック
レジスト等からなる遮光膜５１（ブラックマトリクス）
が格子状に形成され、遮光膜５１間にはＲ（赤）、Ｇ
（緑）、Ｂ（青）の３原色に対応するカラーフィルター
層５２ｒ，５２ｇ，５２ｂが形成されている。カラーフ
ィルター層５２ｒ，５２ｇ，５２ｂを覆うようにオーバ
ーコート膜５３が形成され、オーバーコート膜５３上に
ＩＴＯ等の透明導電膜からなる対向電極１２が、図７に
示すように直線状に並行して複数形成されている。In the case of the present embodiment, the first substrate 9
A light-shielding film 51 (black matrix) made of, for example, a resin black resist or the like
Are formed in a lattice shape, and R (red), G
Color filter layers 52r, 52g, and 52b corresponding to the three primary colors (green) and B (blue) are formed. An overcoat film 53 is formed so as to cover the color filter layers 52r, 52g, and 52b. On the overcoat film 53, the counter electrodes 12 made of a transparent conductive film such as ITO are linearly parallel as shown in FIG. Are formed.
【００５２】また平面的に見ると、図７に示すように、
Ｒ、Ｇ、Ｂ各色毎のカラーフィルター層５２ｒ，５２
ｇ，５２ｂは、各画素領域１３が３分割されて各領域内
にカラーフィルターとほぼ同じ色の有機ＥＬ素子７の１
つの発光部１８ｒ，１８ｇ，１８ｂが含まれるように配
置されるとともに、カラーフィルター層５２ｒ，５２
ｇ，５２ｂの色の配置と有機ＥＬ素子の発光部１８ｒ，
１８ｇ，１８ｂの色の配置が一致している。When viewed in plan, as shown in FIG.
Color filter layers 52r, 52 for each of R, G, B colors
g and 52b denote one of the organic EL elements 7 having substantially the same color as the color filter in each of the pixel regions 13 divided into three.
The light emitting portions 18r, 18g, and 18b are arranged so as to include the light emitting portions 18r, 18g, and 18b.
g, 52b and the light emitting portions 18r,
The arrangement of the colors of 18g and 18b matches.
【００５３】本実施の形態の構成によれば、光の利用効
率が良くなる。例えば、白色のバックライトを使う場
合、カラーフィルターによってその色以外の波長はカッ
トされてしまうが、光源がカラーフィルターの波長とほ
ぼあった特性であればカットされる波長がほとんど無く
なり、効率が良い。According to the configuration of the present embodiment, the light use efficiency is improved. For example, when using a white backlight, wavelengths other than the color are cut off by the color filter, but if the light source has characteristics that are almost the same as the wavelength of the color filter, there is almost no cut-off wavelength, resulting in high efficiency. .
【００５４】［第５の実施の形態］以下、本発明の第５
の実施の形態を図９および図１０を参照して説明する。[Fifth Embodiment] Hereinafter, a fifth embodiment of the present invention will be described.
Will be described with reference to FIGS. 9 and 10. FIG.
【００５５】図９は本実施の形態の液晶表示装置の有機
ＥＬ素子６０の概略構成を示す平面図、図１０は１つの
画素領域１３内の構成をより詳細に示した平面図であ
る。FIG. 9 is a plan view showing a schematic configuration of the organic EL element 60 of the liquid crystal display device of the present embodiment, and FIG. 10 is a plan view showing the configuration in one pixel region 13 in more detail.
【００５６】本実施の形態においては、液晶パネルの構
成に関する説明を省略するが、上記第１〜第４の実施の
形態の液晶パネルと同様のものが用いられる。そして、
反射電極には各画素領域毎に開口部がそれぞれ形成さ
れ、各開口部に対応して有機ＥＬ素子の発光部が形成さ
れている。この構成も上記実施の形態と同様である。画
面上で見ると、図９に示すように、多数の発光部６１，
６１ａが配置されているが、本実施の形態の場合、有機
ＥＬ素子６０の各発光部６１，６１ａ（電極）を接続す
る配線６２，６２ａが特殊な接続関係になっている。そ
のため、図９に示した各配線６２，６２ａに同一の電圧
を印加した場合には全ての発光部６１が均一に発光する
が、例えば配線６２ａのみに大きな電圧を印加した場合
には配線６２ａに接続された発光部６１ａのみが強く発
光し、この例では「Ａ」の文字が明るく浮き上がること
になる。各発光部６１，６１ａの中は、図１０に示した
ように、例えば第３の実施の形態で説明したように、各
画素領域１３毎に３つの発光部１８を設け、これら３つ
の発光部１８を並列に接続した構成とすればよい。In this embodiment, the description of the configuration of the liquid crystal panel is omitted, but the same one as the liquid crystal panel of the above-described first to fourth embodiments is used. And
Openings are formed in the reflective electrode for each pixel region, and a light emitting portion of the organic EL element is formed corresponding to each opening. This configuration is the same as in the above embodiment. When viewed on the screen, as shown in FIG.
Although 61a is arranged, in the case of the present embodiment, wires 62, 62a connecting the light emitting portions 61, 61a (electrodes) of the organic EL element 60 have a special connection relationship. Therefore, when the same voltage is applied to each of the wirings 62 and 62a shown in FIG. 9, all the light emitting units 61 emit light uniformly, but when a large voltage is applied only to the wiring 62a, for example, Only the connected light emitting unit 61a emits light intensely, and in this example, the character of "A" comes up brightly. As shown in FIG. 10, for example, as described in the third embodiment, three light emitting units 18 are provided for each pixel region 13 in each of the light emitting units 61 and 61a. 18 may be connected in parallel.
【００５７】このように、本実施の形態の液晶表示装置
によれば、有機ＥＬ素子６０の多数の発光部６１，６１
ａの中で任意の一部の発光部６１ａのみに個別に電圧を
印加し得る構成としたことによって、通常の表示とは別
にバックライトとして所望の文字や絵柄等を浮かび上が
らせることができ、装飾性に優れた液晶表示装置を実現
することができる。As described above, according to the liquid crystal display device of the present embodiment, the large number of light emitting portions 61 of the organic EL element 60 are provided.
a, by applying a voltage individually to only a part of the light emitting portions 61a, desired characters and pictures can be displayed as a backlight separately from a normal display, and decoration can be performed. A liquid crystal display device having excellent performance can be realized.
【００５８】［第６の実施の形態］以下、上記の第１〜
第５の実施の形態の液晶表示装置を備えた電子機器の具
体例について説明する。[Sixth Embodiment] Hereinafter, the first to sixth embodiments will be described.
A specific example of an electronic apparatus including the liquid crystal display device according to the fifth embodiment will be described.
【００５９】図１１は、携帯電話の一例を示した斜視図
である。FIG. 11 is a perspective view showing an example of a mobile phone.
【００６０】図１１において、符号１０００は携帯電話
本体を示し、符号１００１は上記の液晶表示装置を用い
た液晶表示部を示している。In FIG. 11, reference numeral 1000 denotes a main body of a portable telephone, and reference numeral 1001 denotes a liquid crystal display unit using the above-mentioned liquid crystal display device.
【００６１】図１２は、腕時計型電子機器の一例を示し
た斜視図である。FIG. 12 is a perspective view showing an example of a wristwatch-type electronic device.
【００６２】図１２において、符号１１００は時計本体
を示し、符号１００１は上記の液晶表示装置を用いた液
晶表示部を示している。In FIG. 12, reference numeral 1100 denotes a watch main body, and reference numeral 1001 denotes a liquid crystal display unit using the above liquid crystal display device.
【００６３】図１３は、ワープロ、パソコンなどの携帯
型情報処理装置の一例を示した斜視図である。FIG. 13 is a perspective view showing an example of a portable information processing device such as a word processor or a personal computer.
【００６４】図１３において、符号１２００は情報処理
装置、符号１２０２はキーボードなどの入力部、符号１
２０４は情報処理装置本体、符号１００１は上記の液晶
表示装置を用いた液晶表示部を示している。In FIG. 13, reference numeral 1200 denotes an information processing device, reference numeral 1202 denotes an input unit such as a keyboard, and reference numeral 1 denotes an input unit.
Reference numeral 204 denotes an information processing apparatus main body, and reference numeral 1001 denotes a liquid crystal display unit using the above liquid crystal display device.
【００６５】図１１〜図１３に示す電子機器は、上記の
液晶表示装置を用いた液晶表示部を備えたものであるの
で、バックライトに起因する消費電力が低減され、効率
の良いものとすることができる。Since the electronic apparatus shown in FIGS. 11 to 13 is provided with a liquid crystal display unit using the above-described liquid crystal display device, the power consumption due to the backlight is reduced and the efficiency is improved. be able to.
【００６６】なお、本発明の技術範囲は上記実施の形態
に限定されるものではなく、本発明の趣旨を逸脱しない
範囲において種々の変更を加えることが可能である。例
えば上記実施の形態においては、反射電極に形成する開
口部の形状としてスリットの例と矩形状の例を示した
が、開口部の形状や寸法は適宜設計変更が可能である。
上記実施の形態では各画素領域毎に開口部を設けたた
め、バックライトの輝度ムラをなくす意味で好ましい
が、この点を別にすれば開口部を反射電極上のどの位置
に形成してもかまわない。また上述したように、発光部
の形状や寸法も適宜設計変更が可能である。有機ＥＬ素
子の作製方法としては高分子系組成物をインクジェット
方式で噴射して形成する例を挙げたが、その方法に代え
て、低分子系組成物を真空蒸着法、マスクスパッタ法等
により形成する方法を採っても良い。さらに、本発明
は、ＳＴＮ型液晶表示装置に限らず、ＴＦＤ（Thin Fil
m Diode）型液晶表示装置、ＴＦＴ（Thin Film Transis
tor）型液晶表示装置等にも適用が可能である。The technical scope of the present invention is not limited to the above embodiment, and various changes can be made without departing from the spirit of the present invention. For example, in the above embodiment, the example of the slit and the example of the rectangular shape are shown as the shape of the opening formed in the reflective electrode. However, the shape and size of the opening can be appropriately changed in design.
In the above embodiment, an opening is provided for each pixel region, which is preferable in terms of eliminating luminance unevenness of the backlight. However, apart from this point, the opening may be formed at any position on the reflective electrode. . Further, as described above, the shape and dimensions of the light emitting unit can be appropriately changed in design. As an example of a method for manufacturing an organic EL element, a high-molecular composition is formed by jetting the high-molecular composition by an inkjet method. Instead, a low-molecular composition is formed by a vacuum deposition method, a mask sputtering method, or the like. May be adopted. Further, the present invention is not limited to the STN type liquid crystal display device, but may be applied to a TFD (Thin Fil
m Diode) liquid crystal display, TFT (Thin Film Transis)
It is also applicable to tor) type liquid crystal display devices and the like.
【００６７】[0067]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、反射電極の開口部の下方のみにＥＬ素子の発光
部を設ける構成を採用したことによって、開口部下方の
最小限の領域のみに発光部を設ければ済み、従来のバッ
クライトを用いた半透過型液晶表示装置に比べて消費電
力を充分に低減することができる。特にＥＬ素子として
有機ＥＬ素子を用いた場合、低電圧で高輝度の発光が得
られ、輝度ムラが少なく、明るい表示画面を得ることが
できる。As described above in detail, according to the present invention, the structure in which the light emitting portion of the EL element is provided only below the opening of the reflection electrode is employed, thereby minimizing the light emission below the opening. It is sufficient to provide the light emitting portion only in the region, and the power consumption can be sufficiently reduced as compared with a conventional transflective liquid crystal display device using a backlight. In particular, when an organic EL element is used as the EL element, high-luminance light emission can be obtained at a low voltage, and a bright display screen with less luminance unevenness can be obtained.
【図１】 本発明の第１の実施形態の液晶表示装置の各
画素領域を示す平面図である。FIG. 1 is a plan view showing each pixel region of a liquid crystal display device according to a first embodiment of the present invention.
【図２】 図１のＡ−Ａ’線に沿う断面図である。FIG. 2 is a sectional view taken along the line A-A 'of FIG.
【図３】 本発明の第２の実施形態の液晶表示装置の各
画素領域を示す平面図である。FIG. 3 is a plan view showing each pixel region of a liquid crystal display device according to a second embodiment of the present invention.
【図４】 図１のＢ−Ｂ’線に沿う断面図である。FIG. 4 is a sectional view taken along the line B-B 'of FIG.
【図５】 本発明の第３の実施形態の液晶表示装置の各
画素領域を示す平面図である。FIG. 5 is a plan view showing each pixel region of a liquid crystal display device according to a third embodiment of the present invention.
【図６】 図５のＣ−Ｃ’線に沿う断面図である。FIG. 6 is a sectional view taken along line C-C ′ in FIG. 5;
【図７】 本発明の第４の実施形態の液晶表示装置の各
画素領域を示す平面図である。FIG. 7 is a plan view illustrating each pixel region of a liquid crystal display device according to a fourth embodiment of the present invention.
【図８】 図７のＤ−Ｄ’線に沿う断面図である。FIG. 8 is a sectional view taken along line D-D 'of FIG.
【図９】 本発明の第５の実施形態の液晶表示装置の有
機ＥＬ素子の概略構成を示す平面図である。FIG. 9 is a plan view illustrating a schematic configuration of an organic EL element of a liquid crystal display device according to a fifth embodiment of the present invention.
【図１０】 同、有機ＥＬ素子の１つの画素領域内の構
成をより詳細に示した平面図である。FIG. 10 is a plan view showing the configuration in one pixel region of the organic EL element in more detail.
【図１１】 上記実施形態の液晶表示装置を用いた電子
機器の一例を示す斜視図である。FIG. 11 is a perspective view illustrating an example of an electronic apparatus using the liquid crystal display device of the embodiment.
【図１２】 同、電子機器の他の例を示す斜視図であ
る。FIG. 12 is a perspective view showing another example of the electronic device.
【図１３】 同、電子機器のさらに他の例を示す斜視図
である。FIG. 13 is a perspective view showing still another example of the electronic apparatus.
１，３０，４０，５０ 液晶表示装置 ７，６０ 有機ＥＬ素子 ８ 第１の基板 ９ 第２の基板 １０ 液晶層 １１，３１ 反射電極 １２ 対向電極 １３ 画素領域 １７ スリット（開口部） １８，１８ｒ，１８ｇ，１８ｂ，６１，６１ａ 発光部 ２４ 有機発光層 ３２ 開口部 ５２ｒ，５２ｇ，５２ｂ カラーフィルター層 1, 30, 40, 50 Liquid crystal display device 7, 60 Organic EL element 8 First substrate 9 Second substrate 10 Liquid crystal layer 11, 31 Reflective electrode 12 Counter electrode 13 Pixel region 17 Slit (opening) 18, 18r, 18g, 18b, 61, 61a Light-emitting part 24 Organic light-emitting layer 32 Opening 52r, 52g, 52b Color filter layer
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H091 FA02Y FA14Y FA34Y FA44Z FB02 FD04 GA02 HA10 LA12 3K007 AA02 AA04 AA06 AB17 CA01 CB01 DA01 DB03 EB00 5G435 AA03 AA16 AA18 BB05 BB12 BB15 BB16 CC12 DD10 DD13 EE11 EE26 EE30 FF03 GG11 GG25 GG26 GG27 HH13 KK03 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H091 FA02Y FA14Y FA34Y FA44Z FB02 FD04 GA02 HA10 LA12 3K007 AA02 AA04 AA06 AB17 CA01 CB01 DA01 DB03 EB00 5G435 AA03 AA16 AA18 BB05 BB12 BB15 BB11 BB11 BB10 GG27 HH13 KK03
Claims (7)
り、前記一対の基板のうちの一方の基板上に、他方の基
板側から入射された光を反射するとともに他方の基板上
の対向電極との間で前記液晶層に電界を印加する複数の
反射電極が設けられた液晶表示装置であって、前記一対
の基板の外面側にエレクトロルミネッセンス素子が配置
され、前記複数の反射電極のうち、少なくとも一部の電
極に開口部が設けられ、該開口部の位置に対応する領域
に前記エレクトロルミネッセンス素子の発光部が形成さ
れたことを特徴とする液晶表示装置。1. A liquid crystal layer is sandwiched between a pair of substrates, and reflects light incident on one of the pair of substrates from the other substrate and opposes the light on the other substrate. A liquid crystal display device provided with a plurality of reflective electrodes for applying an electric field to the liquid crystal layer between the electrodes, wherein an electroluminescent element is arranged on an outer surface side of the pair of substrates, and A liquid crystal display device, wherein an opening is provided in at least a part of the electrodes, and a light emitting portion of the electroluminescent element is formed in a region corresponding to the position of the opening.
機エレクトロルミネッセンス素子であることを特徴とす
る請求項１に記載の液晶表示装置。2. The liquid crystal display device according to claim 1, wherein said electroluminescent element is an organic electroluminescent element.
規定される画素領域毎に、前記開口部が設けられたこと
を特徴とする請求項１または２に記載の液晶表示装置。3. The liquid crystal display device according to claim 1, wherein the opening is provided for each pixel region defined by the plurality of reflective electrodes and the counter electrode.
れ、これら複数の開口部に対応する前記エレクトロルミ
ネッセンス素子の各発光部がそれぞれ異なる色の光を発
光する構成とされたことを特徴とする請求項３に記載の
液晶表示装置。4. A plurality of openings are provided for each of said pixel regions, and each light emitting portion of said electroluminescent element corresponding to said plurality of openings emits light of a different color. The liquid crystal display device according to claim 3, wherein
フィルター層が設けられ、前記エレクトロルミネッセン
ス素子の各発光部から発光される光の色と当該発光部に
対応する領域における前記カラーフィルター層の色とが
一致していることを特徴とする請求項４に記載の液晶表
示装置。5. A color filter layer is provided on one of the pair of substrates, and a color of light emitted from each light emitting portion of the electroluminescence element and a color filter layer in a region corresponding to the light emitting portion are provided. The liquid crystal display device according to claim 4, wherein the colors match.
に対応する複数の発光部のうちの一部の発光部を用いて
前記エレクトロルミネッセンス素子を任意の形状に発光
させることを特徴とする請求項３ないし５のいずれか一
項に記載の液晶表示装置。6. The electroluminescent element is configured to emit light in an arbitrary shape by using a part of a plurality of light emitting units corresponding to the openings provided for each of the pixel regions. The liquid crystal display device according to claim 3.
の液晶表示装置を備えたことを特徴とする電子機器。7. An electronic apparatus comprising the liquid crystal display device according to claim 1. Description:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23867899A JP3767264B2 (en) | 1999-08-25 | 1999-08-25 | Liquid crystal display device and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23867899A JP3767264B2 (en) | 1999-08-25 | 1999-08-25 | Liquid crystal display device and electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001066593A true JP2001066593A (en) | 2001-03-16 |
| JP3767264B2 JP3767264B2 (en) | 2006-04-19 |
Family
ID=17033691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23867899A Expired - Fee Related JP3767264B2 (en) | 1999-08-25 | 1999-08-25 | Liquid crystal display device and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3767264B2 (en) |
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