JP4637513B2 - Display device and driving method thereof - Google Patents
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Description
本発明は、フラットパネル型の表示装置に係り、特にその表示パネルに通常の画像表示を行う領域とミラー機能をも備えた領域とを併設した、所謂ツー・イン・ワン（２ｉｎ１）型の表示装置に関する。 The present invention relates to a flat panel type display device, and in particular, a so-called two-in-one (2 in 1) type display in which a normal image display area and an area having a mirror function are provided on the display panel. Relates to the device.
自発光機能を持つフラットパネル型の表示装置の一つに有機エレクトロルミネッセンス（以下、有機ＥＬと略称する）が知られている。有機ＥＬ表示装置は、有機エレクトロルミネッセンスダイオード素子（以下、有機ＥＬ素子、あるいはＯＬＥＤ素子とも称する）で構成される多数の画素を基板上の表示領域にマトリクス状に配置したものである。基板上で表示領域の外側には、表示領域に配置された各画素を選択する走査線駆動回路と、選択された画素に映像信号（画像信号とも称し、文字、数字、記号なども含む。以下同じ）を供給する信号線駆動回路、およびその他の表示に必要とする各種回路が配置される。 Organic electroluminescence (hereinafter abbreviated as organic EL) is known as one of flat panel display devices having a self-luminous function. An organic EL display device is a device in which a large number of pixels composed of organic electroluminescence diode elements (hereinafter also referred to as organic EL elements or OLED elements) are arranged in a matrix in a display area on a substrate. Outside the display area on the substrate, a scanning line driving circuit for selecting each pixel arranged in the display area and a video signal (also referred to as an image signal, including letters, numbers, symbols, etc.) to the selected pixel. A signal line driving circuit for supplying the same) and other various circuits necessary for display are arranged.
ＯＬＥＤ素子には様々な表示方式があるが、ガラス等の透明な絶縁基板の主面（内面）に透明な一方の電極、有機発光層、他方の電極をこの順で積層し、他方の電極上をガラス等の封止板で気密に封止した構造が一般的である。このようなＯＬＥＤ素子を前記したように多数マトリクス配置して有機ＥＬ表示装置が構成される。上記の一方の電極には、通常はＩＴＯを用いた陽極とし、他方の電極としてはアルミ二ウムを好適とする反射率の高い金属を用いて陰極とする。有機発光層から生成した表示光は陽極を通ってガラス等の透明な絶縁基板から外部に出射する直接光と、有機発光層から生成し、陰極で反射して有機発光層、陽極、ガラス等の透明な絶縁基板から外部に出射する反射光とが表示光となる。 There are various display methods for OLED elements, but one transparent electrode, organic light emitting layer, and the other electrode are laminated in this order on the main surface (inner surface) of a transparent insulating substrate such as glass, and the other electrode is In general, the structure is hermetically sealed with a sealing plate such as glass. As described above, an organic EL display device is configured by arranging a large number of such OLED elements in a matrix. One of the electrodes is usually an anode using ITO, and the other electrode is a cathode made of a highly reflective metal such as aluminum. The display light generated from the organic light emitting layer is generated directly from the transparent insulating substrate such as glass through the anode and the organic light emitting layer, reflected from the cathode and reflected from the organic light emitting layer, anode, glass, etc. The reflected light emitted from the transparent insulating substrate to the outside becomes display light.
このような有機ＥＬ表示装置においては、陰極に反射率の高い金属を用いているため、透明な絶縁基板の外から入射する光（外光）が陰極で反射し、上記の表示光と混じることによる表示画像の視認性の低下（コントラストの低下）を招く。このため、通常は表示面を構成するガラス等の透明な絶縁基板の外面に円偏光板を貼り付けて、外光の反射を防止している。このような偏光板の取り付けの結果、表示される画像が奥行きに乏しい平坦なものになりやすい。 In such an organic EL display device, a metal having high reflectivity is used for the cathode, so that light incident from the outside of the transparent insulating substrate (external light) is reflected by the cathode and mixed with the display light. This causes a decrease in the visibility of the display image (decrease in contrast). For this reason, a circularly polarizing plate is usually attached to the outer surface of a transparent insulating substrate such as glass constituting the display surface to prevent reflection of external light. As a result of attaching such a polarizing plate, the displayed image tends to be flat with a small depth.
特許文献１は、表示面を構成するガラス等の透明な絶縁基板の外面あるいは内面にハーフミラーを設けたものを開示する。また、有機ＥＬパネルに反射ミラーあるいはハーフミラーを設けた車両用ミラーを特許文献２が開示する。
上記した特許文献１に開示される発明は、有機ＥＬパネルの基板を反射ミラーまたはハーフミラーの基板に共用することで、後方視界と表示情報との視差を低減するものであるが有機ＥＬパネルの全表示領域に反射ミラーを形成するものであり、有機ＥＬの表示画像に後部の様子をミックスして観察者（運転手）に提供するものであるため、情報の識別性に難がある。 The invention disclosed in Patent Document 1 described above reduces the parallax between the rear field of view and display information by sharing the substrate of the organic EL panel with the substrate of the reflection mirror or the half mirror. Since the reflection mirror is formed in the entire display area, and the state of the rear part is mixed with the display image of the organic EL and provided to the observer (driver), there is a difficulty in identifying information.
本発明の目的は、外光反射を有効に利用する領域と有機ＥＬの自発光表示機能を優先する領域とを併設して、状況に応じてこれらの各領域を同時に機能させ、あるいは個別に機能させ、若しくは使用目的に応じて何れか一方の機能を優先した表示装置に特化することを可能とした表示装置およびその駆動方法を提供することにある。 An object of the present invention is to provide a region that effectively uses external light reflection and a region that prioritizes the self-luminous display function of the organic EL, and allows these regions to function simultaneously or individually according to the situation. Another object of the present invention is to provide a display device that can be specialized in a display device that prioritizes one of the functions according to the purpose of use, and a driving method thereof.
本発明の表示装置は、透明絶縁基板の主面に画素対応でマトリクス配置した多数の薄膜トランジスタおよびこの薄膜トランジスタに駆動信号を与えるための配線を有する配線／薄膜トランジスタ部と、前記配線／薄膜トランジスタ部に隣接して、前記薄膜トランジスタの各出力電極に接続した透明材料からなる一方の電極が形成されて、該一方の電極の各々の上に画素対応で積層した複数の有機発光層とを形成した画素部とを有する。 The display device of the present invention includes a plurality of thin film transistors arranged in a matrix corresponding to pixels on a main surface of a transparent insulating substrate, a wiring / thin film transistor portion having wirings for supplying a driving signal to the thin film transistor, and adjacent to the wiring / thin film transistor portion. A pixel portion formed with one electrode made of a transparent material connected to each output electrode of the thin film transistor, and a plurality of organic light emitting layers laminated in correspondence with the pixel on each of the one electrode; Have.
そして、前記配線／薄膜トランジスタ部と前記画素部を含む領域の前面あるいは複数画素にわたって共通に覆う他方の電極が配置され、前記他方の電極を含む前記透明絶縁基板の主面側を封止板で気密に封止されており、前記透明絶縁基板の一部に円偏光板が貼付されて高品位表示領域が形成され、かつ、前記他方の電極の前記有機発光層側は鏡面で、前記高品位表示領域を除く部分が鏡機能付加表示領域である構成とされる。 The other electrode that covers the front surface of the region including the wiring / thin film transistor portion and the pixel portion or the plurality of pixels in common is disposed, and the main surface side of the transparent insulating substrate including the other electrode is hermetically sealed with a sealing plate A high-quality display region is formed by pasting a circularly polarizing plate on a part of the transparent insulating substrate, and the organic light-emitting layer side of the other electrode is a mirror surface, and the high-quality display The part excluding the area is a mirror function added display area.
前記画素部は隣接する配線部に有する低反射性のバンクで囲まれており、前記バンクの内側に前記有機発光層が形成されており、少なくとも前記鏡機能付加表示領域の前記透明絶縁基板の主面側の前記配線／薄膜トランジスタ部に反射率向上層を設けるか、あるいは該主面側にハーフミラー層を設ける。 The pixel portion is surrounded by a low-reflective bank in an adjacent wiring portion, the organic light emitting layer is formed inside the bank, and at least the main part of the transparent insulating substrate in the mirror function added display region A reflectance improving layer is provided on the wiring / thin film transistor portion on the surface side, or a half mirror layer is provided on the main surface side.
前記高品位表示領域では、前記円偏光板から入射して前記他方の電極で反射する外光が該円偏光板で外部への出射が制限され、前記有機発光層の発光光が主として該円偏光板から外部に出射する。 In the high-definition display region, external light that is incident from the circularly polarizing plate and reflected by the other electrode is restricted from being emitted to the outside by the circularly polarizing plate, and light emitted from the organic light emitting layer is mainly the circularly polarized light. The light is emitted from the plate to the outside.
また、少なくとも前記鏡機能付加表示領域の前記透明絶縁基板の主面側にハーフミラー層を有し、前記透明絶縁基板から入射する外光が、前記他方の電極と前記ハーフミラー層とで反射して該透明絶縁基板から外部に出射する。 In addition, a half mirror layer is provided at least on the main surface side of the transparent insulating substrate in the mirror function-added display area, and external light incident from the transparent insulating substrate is reflected by the other electrode and the half mirror layer. Then, the light is emitted from the transparent insulating substrate.
前記高品位表示領域は自発光による高コントラストの情報表示を行う領域であり、前記鏡機能付加表示領域は自発光による情報表示が可能な反射鏡としての機能を提供する領域である。 The high-quality display area is an area for displaying high-contrast information by self-light emission, and the mirror function-added display area is an area for providing a function as a reflecting mirror capable of displaying information by self-light emission.
前記配線／薄膜トランジスタ部の配線は、前記薄膜トランジスタを選択するための走査信号線、選択された薄膜トランジスタに画像データを供給するためのデータ信号線、選択された薄膜トランジスタで駆動される画素に発光用の電流を供給するための電流供給線を少なくとも含む。そして、前記走査信号線に走査信号を供給する走査信号駆動回路と、前記データ信号線に表示データを供給するデータ信号駆動回路と、前記電流供給線に電流を供給する発光電源回路とを備え、前記発光電源回路と前記データ信号駆動回路の何れか一方により前記高品位表示領域と前記鏡機能付加表示領域との輝度を制御する。 The wiring of the wiring / thin film transistor unit includes a scanning signal line for selecting the thin film transistor, a data signal line for supplying image data to the selected thin film transistor, and a current for emitting light to a pixel driven by the selected thin film transistor. At least a current supply line for supplying. A scanning signal driving circuit that supplies a scanning signal to the scanning signal line; a data signal driving circuit that supplies display data to the data signal line; and a light-emitting power supply circuit that supplies current to the current supply line. The luminance of the high-quality display area and the mirror function-added display area is controlled by one of the light emission power supply circuit and the data signal drive circuit.
前記発光電源回路を前記高品位表示領域と前記鏡機能付加表示領域とのそれぞれに対応して別個に設け、あるいは前記データ信号駆動回路を前記高品位表示領域と前記鏡機能付加表示領域とに共通に設けることができる。 The light-emitting power supply circuit is provided separately for each of the high-quality display area and the mirror function-added display area, or the data signal driving circuit is shared by the high-quality display area and the mirror function-added display area. Can be provided.
また、前記データ信号駆動回路を前記高品位表示領域と前記鏡機能付加表示領域とに独立に設けることができ、あるいは前記データ信号駆動回路を前記高品位表示領域と前記鏡機能付加表示領域とのそれぞれに対応して別個に設けることができる。 Further, the data signal driving circuit can be provided independently in the high-quality display area and the mirror function-added display area, or the data signal driving circuit can be provided between the high-quality display area and the mirror function-added display area. Each can be provided separately.
前記高品位表示領域と前記鏡機能付加表示領域との両方を用いて一つの情報を表示する際などに、前記発光電源回路と前記データ信号駆動回路の何れか一方により前記高品位表示領域と前記鏡機能付加表示領域との輝度を略同一に制御することができる。また、前記高品位表示領域と前記鏡機能付加表示領域との両方を用いて一つ鏡とすることができる。 When displaying one piece of information using both the high-quality display area and the mirror function-added display area, the high-quality display area and the data signal driving circuit are used to display the high-quality display area and the data signal driving circuit. The brightness of the mirror function additional display area can be controlled to be substantially the same. Further, a single mirror can be formed by using both the high-quality display area and the mirror function-added display area.
なお、本発明は、上記の構成および後述する実施の形態に開示される構成に限定されるものではなく、本発明の技術思想を逸脱することなく、種々の変更が可能である。 Note that the present invention is not limited to the above-described configuration and the configuration disclosed in the embodiments described below, and various modifications can be made without departing from the technical idea of the present invention.
画素部に加えて配線／薄膜トランジスタ部にも反射性を付与することで、全体として高い反射性を持つ鏡機能を付加した有機ＥＬパネルが得られる。そして、高い品質の表示を必要とする高品位表示領域には円偏光板を貼付して高コントラスト表示を実現し、鏡としての機能を優先する鏡機能付加表示領域には円偏光板を貼付しないことで高反射性をもつ有機ＥＬパネルが得られる。なお、高品位表示領域または鏡機能付加表示領域が有機ＥＬパネルの全領域とすることもできる。 By adding reflectivity to the wiring / thin film transistor portion in addition to the pixel portion, an organic EL panel to which a mirror function having high reflectivity as a whole is added can be obtained. A high-definition display area that requires high quality display is attached with a circularly polarizing plate to achieve a high-contrast display, and a circularly polarizing plate is not attached to a mirror function-added display area that prioritizes mirror function. Thus, an organic EL panel having high reflectivity can be obtained. Note that the high-quality display area or the mirror function-added display area may be the entire area of the organic EL panel.
パネルの一部に円偏光板を貼り付けた本発明の表示装置を車両のバックミラーに用いることで、該円偏光板を貼り付けた高品位表示領域に車両運転／運行のための重要情報を表示し、円偏光板を貼り付けない鏡機能付加表示領域は後部画像の反射表示を主とするバックミラーとして機能させる多機能のバックミラーを提供できる。なお、この鏡機能付加表示領域に適宜の情報を表示させることもできる。 By using the display device of the present invention in which a circularly polarizing plate is attached to a part of a panel as a vehicle rearview mirror, important information for driving / operating the vehicle is displayed in a high-definition display region where the circularly polarizing plate is attached A mirror function-added display area that displays and does not attach a circularly polarizing plate can provide a multifunctional rear-view mirror that functions mainly as a rear-view mirror for reflective display of the rear image. It is also possible to display appropriate information in this mirror function addition display area.
以下、本発明の実施の形態について、実施例により詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to examples.
図１は、本発明による表示装置の実施例１を示す有機ＥＬパネルの説明図で、図１の（ａ）は正面図、図１の（ｂ）は側面図である。符号ＰＮＬは有機ＥＬパネルを示し、符号ＰＯＬは有機ＥＬパネルＰＮＬの一部に貼付した円偏光板を示す。有機ＥＬパネルＰＮＬは、詳細は後述するように、二枚の透明絶縁基板としてのガラス基板ＳＵＢ１とＳＵＢ２を貼り合わせて構成されている。ガラス基板ＳＵＢ１は主基板であり、ガラス基板ＳＵＢ２は封止缶である。ガラス基板板ＳＵＢ１の外面の一部には円偏光板ＰＯＬが粘着剤で貼り付けられている。円偏光板ＰＯＬを貼り付けた領域は高品位表示領域Ｒ１となり、円偏光板ＰＯＬの存在しない領域は鏡機能付加表示領域Ｒ２となる。 1A and 1B are explanatory diagrams of an organic EL panel showing Embodiment 1 of a display device according to the present invention, in which FIG. 1A is a front view and FIG. 1B is a side view. Symbol PNL indicates an organic EL panel, and symbol POL indicates a circularly polarizing plate attached to a part of the organic EL panel PNL. As will be described in detail later, the organic EL panel PNL is configured by bonding two glass substrates SUB1 and SUB2 as transparent insulating substrates. The glass substrate SUB1 is a main substrate, and the glass substrate SUB2 is a sealing can. A circularly polarizing plate POL is attached to a part of the outer surface of the glass substrate plate SUB1 with an adhesive. The region where the circularly polarizing plate POL is pasted becomes the high-quality display region R1, and the region where the circularly polarizing plate POL does not exist becomes the mirror function-added display region R2.
円偏光板ＰＯＬを貼り付ける粘着剤を弱粘着性粘着剤とすることで、円偏光板ＰＯＬを剥ぎ取って有機ＥＬパネルＰＮＬの全面を鏡機能付加表示領域とすることができる。また、円偏光板ＰＯＬを再貼付することで図１に示したような高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２を持つ表示装置に戻すことができる。 By making the adhesive for attaching the circularly polarizing plate POL a weak adhesive, the entire surface of the organic EL panel PNL can be used as a mirror function added display region by peeling off the circularly polarizing plate POL. Further, by reattaching the circularly polarizing plate POL, it is possible to return to the display device having the high-quality display region R1 and the mirror function added display region R2 as shown in FIG.
高品位表示領域Ｒ１は円偏光板ＰＯＬにより外光反射が防止され、有機ＥＬとしての表示画像のコントラストが向上し高品質表示が可能となる。そのため、この表示装置を自動車のバックミラーなどに用いた場合には、この高品位表示領域Ｒ１は重要情報の表示に好適となる。したがって、この場合、高品位表示領域Ｒ１は鏡としての機能は小さくなる。 In the high quality display region R1, reflection of external light is prevented by the circularly polarizing plate POL, and the contrast of the display image as the organic EL is improved, thereby enabling high quality display. Therefore, when this display device is used for a rearview mirror of an automobile, the high-quality display area R1 is suitable for displaying important information. Therefore, in this case, the high-quality display region R1 has a small function as a mirror.
一方、鏡機能付加表示領域Ｒ２は円偏光板が除去された状態で、かつ外光反射率を向上させる素子構造となっていることから、その領域全体が鏡（反射鏡）として機能する。なお、この鏡機能付加表示領域Ｒ２は有機ＥＬとしての自発光型の情報表示も可能であるが、その表示品質は高品位表示領域Ｒ１のそれより劣る。 On the other hand, since the mirror function-added display region R2 has an element structure in which the circularly polarizing plate is removed and the external light reflectance is improved, the entire region functions as a mirror (reflecting mirror). The mirror function-added display area R2 can display self-luminous information as an organic EL, but its display quality is inferior to that of the high-quality display area R1.
図２は、図１における高品位表示領域の１画素付近の構造例を説明する模式断面図である。有機ＥＬパネルは透明ガラス基板（以下、単にガラス基板）ＳＵＢ１の主面（すなわち、内面）に形成された配線や薄膜トランジスタなどの駆動構造ＷＴ、および絶縁層ＩＮＳが成膜されている。その上に有機ＥＬ素子の一方の電極（ここでは、陽極）ＡＮＤが画素ごとに形成されている。図示はしないが、陽極ＡＮＤは駆動構造ＷＴを構成する薄膜トランジスタの駆動出力に接続されている。そして、駆動構造ＷＴが形成された配線／薄膜トランジスタ部ＷＴＲには隣接する画素間を区画するバンクＢＡＮが形成されている。バンクＢＡＮは、光反射率が小さい樹脂で形成される。バンクＢＡＮの間は画素部ＰＸＲである。 FIG. 2 is a schematic cross-sectional view for explaining a structural example near one pixel in the high-definition display region in FIG. In the organic EL panel, a driving structure WT such as a wiring and a thin film transistor formed on a main surface (that is, an inner surface) of a transparent glass substrate (hereinafter simply referred to as a glass substrate) SUB1, and an insulating layer INS are formed. On top of this, one electrode (here, anode) AND of the organic EL element is formed for each pixel. Although not shown, the anode AND is connected to the drive output of the thin film transistor constituting the drive structure WT. A bank BAN that partitions adjacent pixels is formed in the wiring / thin film transistor portion WTR in which the drive structure WT is formed. The bank BAN is made of a resin having a low light reflectance. Between the banks BAN is a pixel portion PXR.
そして、一対のバンクＢＡＮの間に形成される凹部に有機発光層ＯＬＥが真空蒸着やインクジェットなどの塗布手段で設けられる。有機発光層ＯＬＥは、ホール注入層／ホール移送層／発光層／電子移送層／電子注入層などを積層した多層構造からなる。この有機発光層ＯＬＥを覆って他方の電極（ここでは、陰極）ＣＴＤが成膜されている。陰極ＣＴＤは高品位表示領域にある全画素または複数画素を共通に覆って形成される。最も一般的には、該全画素を共通に覆って形成される。なお、この場合、後述する鏡機能付加表示領域の画素を含めて共通に形成することもできる。 Then, an organic light emitting layer OLE is provided in a recess formed between the pair of banks BAN by a coating means such as vacuum deposition or ink jet. The organic light emitting layer OLE has a multilayer structure in which a hole injection layer / a hole transport layer / a light emitting layer / an electron transport layer / an electron injection layer are stacked. The other electrode (in this case, the cathode) CTD is formed so as to cover the organic light emitting layer OLE. The cathode CTD is formed so as to cover all pixels or a plurality of pixels in the high-definition display area in common. Most commonly, it is formed so as to cover all the pixels in common. In this case, it can be formed in common including pixels in a mirror function-added display area described later.
ガラス基板ＳＵＢ１の外面（主面と反対の面）には、粘着剤ＡＤＨを介して円偏光板ＰＯＬが貼付されている。粘着剤ＡＤＨは弱粘着性のものを用いるのが好適である。これにより、円偏光板ＰＯＬを引き剥がしてパネル全面を鏡機能付加表示領域としたり、円偏光板ＰＯＬを再度貼り付けて高品位表示領域を再形成することが容易になる。 A circularly polarizing plate POL is attached to the outer surface (the surface opposite to the main surface) of the glass substrate SUB1 via an adhesive ADH. The pressure-sensitive adhesive ADH is preferably weakly adhesive. Accordingly, it becomes easy to peel off the circularly polarizing plate POL to make the entire surface of the panel a mirror function-added display region, or to reattach the circularly polarizing plate POL and re-form the high-quality display region.
なお、陰極ＣＴＤを成膜したガラス基板ＳＵＢ１の主面は、封止缶とも称する他のガラス基板ＳＵＢ２で気密に封止される。このガラス基板ＳＵＢ２の内面の適当な場所には乾燥剤（吸湿剤）ＤＳＣが配置されており、二枚のガラス板で囲まれる空間を乾燥状態に保持している。 The main surface of the glass substrate SUB1 on which the cathode CTD is formed is hermetically sealed with another glass substrate SUB2, which is also called a sealing can. A desiccant (hygroscopic agent) DSC is disposed at an appropriate location on the inner surface of the glass substrate SUB2, and the space surrounded by the two glass plates is kept in a dry state.
このように構成した高品位表示領域では、円偏光板ＰＯＬとガラス基板ＳＵＢ１を通して配線／薄膜トランジスタ部ＷＴＲに入射する外光Ｌ１は絶縁層ＩＮＳやバンクＢＡＮ当の構造層で反射されることなく減衰し、また円偏光板ＰＯＬとガラス基板ＳＵＢ１を通して画素部ＰＸＲに入射する外光Ｌ２が陰極ＣＴＤで反射しても円偏光板ＰＯＬを再度通過することなく減衰される。画素部ＰＸＲの発光層ＯＬＥから出射する自発光光ＬＳは円偏光板ＰＯＬを通過して外部に出射する。 In the high-quality display area configured as described above, the external light L1 incident on the wiring / thin film transistor section WTR through the circularly polarizing plate POL and the glass substrate SUB1 is attenuated without being reflected by the structural layer corresponding to the insulating layer INS or the bank BAN. Further, even if the external light L2 incident on the pixel unit PXR through the circularly polarizing plate POL and the glass substrate SUB1 is reflected by the cathode CTD, it is attenuated without passing through the circularly polarizing plate POL again. The self-emitting light LS emitted from the light emitting layer OLE of the pixel unit PXR passes through the circularly polarizing plate POL and is emitted to the outside.
図３は、図１における鏡機能付加表示領域の１画素付近の構造を説明する模式断面図である。鏡機能付加表示領域Ｒ２の１画素の構造は、ガラス基板ＳＵＢ１の外面に円偏光板を有しない。そして、他の構造においては、配線／薄膜トランジスタ部ＷＴＲのガラス基板ＳＵＢ１の主面に反射率向上層ＲＩＭを有している点を除いて図２で説明した断面構造と同じである。反射率向上層ＲＩＭは光反射性が良好な金属材料または非金属材料で形成されるが、ここではアルミニウム膜が使用される。 FIG. 3 is a schematic cross-sectional view for explaining the structure near one pixel in the mirror function-added display region in FIG. The structure of one pixel in the mirror function additional display region R2 does not have a circularly polarizing plate on the outer surface of the glass substrate SUB1. The other structure is the same as the cross-sectional structure described with reference to FIG. 2 except that the reflectance improving layer RIM is provided on the main surface of the glass substrate SUB1 of the wiring / thin film transistor portion WTR. The reflectivity improving layer RIM is formed of a metal material or a non-metal material having good light reflectivity, and an aluminum film is used here.
図３の構造とした鏡機能付加表示領域において、ガラス基板ＳＵＢ１を通して配線／薄膜トランジスタ部ＷＴＲに入射する外光Ｌ１は反射率向上層ＲＩＭで反射してガラス基板ＳＵＢ１を通して外部に出射する。また、ガラス基板ＳＵＢ１を通して画素部ＰＸＲに入射する外光Ｌ２は陰極ＣＴＤで反射してガラス基板ＳＵＢ１を通して外部に出射する。そして、画素部ＰＸＲの発光層ＯＬＥから出射する自発光光ＬＳはガラス基板ＳＵＢ１を通して外部に出射する。 In the mirror function-added display region having the structure of FIG. 3, the external light L1 incident on the wiring / thin film transistor portion WTR through the glass substrate SUB1 is reflected by the reflectance enhancement layer RIM and is emitted to the outside through the glass substrate SUB1. Further, the external light L2 incident on the pixel unit PXR through the glass substrate SUB1 is reflected by the cathode CTD and is emitted to the outside through the glass substrate SUB1. Then, the self-emitting light LS emitted from the light emitting layer OLE of the pixel unit PXR is emitted to the outside through the glass substrate SUB1.
図１の高品位表示領域Ｒ１に図２に示した構造を採用し、鏡機能付加表示領域Ｒ２に図３に示した構造を採用した有機ＥＬパネルを用いて表示装置を構成することで、高い品質の表示を必要とする高品位表示領域には円偏光板を貼付して高コントラスト表示を実現し、鏡としての機能を優先する鏡機能付加表示領域には円偏光板を貼付しないことで高反射性をもつ有機ＥＬパネルが得られる。 The structure shown in FIG. 2 is adopted for the high-quality display region R1 in FIG. 1, and the display device is configured by using an organic EL panel adopting the structure shown in FIG. 3 for the mirror function added display region R2. A high-definition display area that requires quality display is attached with a circularly polarizing plate to achieve high-contrast display, and a circularly polarizing plate is not attached to a mirror function-added display area that prioritizes mirror function. An organic EL panel having reflectivity is obtained.
図４は、本発明による表示装置の実施例２を説明する図１における鏡機能付加表示領域の１画素付近の構造を説明する模式断面図である。実施例２の高品位表示領域Ｒ１の構造は図２と同じである。実施例２の鏡機能付加表示領域Ｒ２は、図３に示したような配線／薄膜トランジスタ部ＷＴＲに形成する反射率向上層ＲＩＭに代えて、配線／薄膜トランジスタ部ＷＴＲと画素部ＰＸＲを含むガラス基板ＳＵＢ１の主面の全域にハーフミラー層ＨＭＲを設けたものである。このハーフミラー層ＨＭＲはクロム（Ｃｒ）薄膜のコーティングや誘電体多層膜のコーティングが好適であり、ここではクロム（Ｃｒ）薄膜を用いた。その他の構造は図３と同様である。 FIG. 4 is a schematic cross-sectional view illustrating the structure near one pixel in the mirror function-added display region in FIG. 1 for explaining the second embodiment of the display device according to the present invention. The structure of the high-quality display region R1 in Example 2 is the same as that in FIG. The mirror function-added display region R2 according to the second embodiment has a glass substrate SUB1 including a wiring / thin film transistor portion WTR and a pixel portion PXR instead of the reflectance enhancement layer RIM formed in the wiring / thin film transistor portion WTR as shown in FIG. A half mirror layer HMR is provided over the entire area of the main surface. The half mirror layer HMR is preferably a chromium (Cr) thin film coating or a dielectric multilayer coating, and a chromium (Cr) thin film is used here. Other structures are the same as those in FIG.
図４の構造とした鏡機能付加表示領域において、ガラス基板ＳＵＢ１を通して配線／薄膜トランジスタ部ＷＴＲに入射する外光Ｌ１はハーフミラー層ＨＭＲでほぼ反射し、再度ガラス基板ＳＵＢ１を通して外部に出射する。また、ガラス基板ＳＵＢ１を通して画素部ＰＸＲに入射しハーフミラー層ＨＭＲを透過した外光Ｌ２は陰極ＣＴＤで反射し、ハーフミラー層ＨＭＲとガラス基板ＳＵＢ１を通して外部に出射する。さらに、ガラス基板ＳＵＢ１を通して画素部ＰＸＲに入射し、ハーフミラー層ＨＭＲで反射した外光Ｌ３はガラス基板ＳＵＢ１を通して外部に出射する。そして、画素部ＰＸＲの発光層ＯＬＥから出射する自発光光ＬＳはガラス基板ＳＵＢ１を通して外部に出射する。 In the mirror function-added display region having the structure of FIG. 4, the external light L1 incident on the wiring / thin film transistor portion WTR through the glass substrate SUB1 is substantially reflected by the half mirror layer HMR, and is emitted to the outside again through the glass substrate SUB1. Further, the external light L2 that has entered the pixel portion PXR through the glass substrate SUB1 and transmitted through the half mirror layer HMR is reflected by the cathode CTD, and is emitted to the outside through the half mirror layer HMR and the glass substrate SUB1. Further, the external light L3 incident on the pixel unit PXR through the glass substrate SUB1 and reflected by the half mirror layer HMR is emitted to the outside through the glass substrate SUB1. Then, the self-emitting light LS emitted from the light emitting layer OLE of the pixel unit PXR is emitted to the outside through the glass substrate SUB1.
図１の高品位表示領域Ｒ１に図２に示した構造を採用し、鏡機能付加表示領域Ｒ２に図４に示した構造を採用した有機ＥＬパネルを用いて表示装置を構成することで、高い品質の表示を必要とする高品位表示領域には円偏光板を貼付して高コントラスト表示を実現し、鏡としての機能を優先する鏡機能付加表示領域には円偏光板を貼付しないことで高反射性をもつ有機ＥＬパネルが得られる。 The structure shown in FIG. 2 is adopted for the high-quality display region R1 in FIG. 1, and the display device is configured by using an organic EL panel adopting the structure shown in FIG. 4 for the mirror function added display region R2. A high-definition display area that requires quality display is attached with a circularly polarizing plate to achieve high-contrast display, and a circularly polarizing plate is not attached to a mirror function-added display area that prioritizes mirror function. An organic EL panel having reflectivity is obtained.
円偏光板の可視光域の透過率は約４２％であるため、円偏光板を貼り付けた高品位表示領域Ｒ１と円偏光板を有しない鏡機能付加表示領域Ｒ２の両方を用いて一つの情報を表示する場合、パネル全体を共通に駆動すると、高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２の間に輝度差が発生する。その解決手段としては、次に説明するような駆動方法とする。 Since the transmittance of the visible light region of the circularly polarizing plate is about 42%, the high-quality display region R1 to which the circularly polarizing plate is attached and the mirror function-added display region R2 having no circularly polarizing plate are used for one. When displaying information, if the entire panel is driven in common, a luminance difference is generated between the high-quality display area R1 and the mirror function-added display area R2. As a means for solving the problem, a driving method as described below is adopted.
図５は、本発明による表示装置の駆動方法の１例を説明する図である。図５において、有機ＥＬパネルＰＮＬは円偏光板を貼り付けた高品位表示領域Ｒ１と円偏光板を有しない鏡機能付加表示領域Ｒ２を有する。この有機ＥＬパネルＰＮＬには、その走査信号線を選択するための走査信号を供給する走査線駆動回路ＳＳＤと選択されたデータ信号線に接続する画素に表示データを供給するデータ信号線駆動回路ＤＳＤおよび表示データが供給される画素の有機ＥＬ素子に電流を供給するための電流供給回路ＰＷＳが接続されている。 FIG. 5 is a diagram for explaining an example of the driving method of the display device according to the present invention. In FIG. 5, the organic EL panel PNL has a high-quality display region R1 with a circularly polarizing plate attached and a mirror function added display region R2 without a circularly polarizing plate. The organic EL panel PNL includes a scanning line driving circuit SSD that supplies a scanning signal for selecting the scanning signal line, and a data signal line driving circuit DSD that supplies display data to pixels connected to the selected data signal line. A current supply circuit PWS for supplying current to the organic EL element of the pixel to which display data is supplied is connected.
走査線駆動回路ＳＳＤとデータ信号線駆動回路ＤＳＤは、外部信号源ＨＳＴから供給される表示信号の基づいて有機ＥＬパネルの表示用のデータとタイミング信号等の各種信号を生成する表示制御装置ＣＴＲに接続している。 The scanning line drive circuit SSD and the data signal line drive circuit DSD are provided in the display control device CTR that generates various signals such as display data and timing signals for the organic EL panel based on the display signal supplied from the external signal source HST. Connected.
走査線駆動回路ＳＳＤは高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２の走査信号線の一方または両方に走査信号を供給する。データ信号線駆動回路ＤＳＤは、高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２に対して共通に設けられている。高品位表示領域Ｒ１にのみ画像を表示し、鏡機能付加表示領域Ｒ２は鏡としてのみで機能させる場合は、走査線駆動回路ＳＳＤは高品位表示領域Ｒ１の走査線にのみ走査信号を供給する。高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２の両方に画像を表示する場合は、走査線駆動回路ＳＳＤは両方の表示領域に走査信号を供給する。なお、鏡機能付加表示領域Ｒ２にのみ画像を表示する場合は、走査線駆動回路ＳＳＤは鏡機能付加表示領域Ｒ２にのみ走査信号を供給する。 The scanning line driving circuit SSD supplies a scanning signal to one or both of the scanning signal lines in the high quality display region R1 and the mirror function added display region R2. The data signal line drive circuit DSD is provided in common for the high-quality display area R1 and the mirror function added display area R2. When an image is displayed only in the high-quality display area R1, and the mirror function added display area R2 functions only as a mirror, the scanning line drive circuit SSD supplies a scanning signal only to the scanning lines in the high-quality display area R1. When displaying an image in both the high-quality display area R1 and the mirror function-added display area R2, the scanning line driving circuit SSD supplies a scanning signal to both display areas. When an image is displayed only in the mirror function additional display region R2, the scanning line driving circuit SSD supplies a scanning signal only to the mirror function additional display region R2.
この構成例では、電流供給回路ＰＷＳを高品位表示領域Ｒ１用の電流供給回路ＰＷＳ１ と鏡機能付加表示領域Ｒ２用の電流供給回路ＰＷＳ２の二つで構成している。電流供給回路ＰＷＳ１と電流供給回路ＰＷＳ２は、高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２の両方を用いて一つの情報を表示する場合に、両表示領域の発光輝度が同じになるように出力電流量が調整されている。また、この出力電流量が調整は使用者が任意に調整できるように構成することも可能である。 In this configuration example, the current supply circuit PWS includes two current supply circuits PWS1 for the high-quality display region R1 and current supply circuit PWS2 for the mirror function additional display region R2. When the current supply circuit PWS1 and the current supply circuit PWS2 display one information using both the high-quality display area R1 and the mirror function-added display area R2, the output brightness is the same in both display areas. The amount of current is adjusted. The output current amount can be adjusted as desired by the user.
これにより、円偏光板を貼り付けた高品位表示領域Ｒ１と円偏光板を有しない鏡機能付加表示領域Ｒ２の両方を用いて一つの情報を表示する場合の両表示領域での輝度差が低減ないしは解消される。 As a result, the difference in luminance between the two display areas is reduced when one information is displayed using both the high-quality display area R1 with the circularly polarizing plate and the mirror function-added display area R2 without the circularly polarizing plate. Or it is eliminated.
図６は、本発明による表示装置の駆動方法の他例を説明する図である。図６示した構成では、電流供給回路ＰＷＳは高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２とに共通に設けられており、走査線駆動回路ＳＳＤは図５と同様の構成となっている。そして、図６では、高品位表示領域Ｒ１と鏡機能付加表示領域Ｒ２とに対し、それぞれ独立にデータ信号を供給するデータ信号線駆動回路ＤＳＤ１とデータ信号線駆動回路ＤＳＤ２を設けている。その他の構成は図５と同様である。 FIG. 6 is a diagram for explaining another example of the driving method of the display device according to the present invention. In the configuration shown in FIG. 6, the current supply circuit PWS is provided in common for the high-quality display region R1 and the mirror function-added display region R2, and the scanning line drive circuit SSD has the same configuration as that in FIG. In FIG. 6, a data signal line drive circuit DSD1 and a data signal line drive circuit DSD2 that supply data signals independently to the high-quality display region R1 and the mirror function added display region R2 are provided. Other configurations are the same as those in FIG.
図６の構成において、データ信号線駆動回路ＤＳＤ１は円偏光板の低透過率による鏡機能付加表示領域Ｒ２との輝度差を補償するように高品位表示領域Ｒ１の画素に供給するデータ信号の表示用電流量が増加するように調整する。これにより、円偏光板を貼り付けた高品位表示領域Ｒ１と円偏光板を有しない鏡機能付加表示領域Ｒ２の両方を用いて一つの情報を表示する場合の両表示領域での輝度差が低減ないしは解消される。 In the configuration of FIG. 6, the data signal line drive circuit DSD1 displays the data signal supplied to the pixels in the high-definition display region R1 so as to compensate for the luminance difference from the mirror function-added display region R2 due to the low transmittance of the circularly polarizing plate. Adjust the current to increase. As a result, the difference in luminance between the two display areas is reduced when one information is displayed using both the high-quality display area R1 with the circularly polarizing plate and the mirror function-added display area R2 without the circularly polarizing plate. Or it is eliminated.
図７は、有機ＥＬパネルへの円偏光板の貼付形態の一例を説明する図であり、図７（ａ）は正面図、図７（ｂ）は側面図である。この例では、有機ＥＬパネルＰＮＬの全面に円偏光板ＰＯＬを弱粘着剤で貼付してある。円偏光板ＰＯＬは、線ＣＴＬで予め切断され、または容易に分離する程度にミシン目が入れられている。また、円偏光板ＰＯＬは、その一部の端部が有機ＥＬパネルＰＮＬの端縁から少しはみ出して貼付することで、剥離を容易にしてある。 7A and 7B are diagrams for explaining an example of a circularly polarizing plate attached to an organic EL panel. FIG. 7A is a front view and FIG. 7B is a side view. In this example, a circularly polarizing plate POL is stuck on the entire surface of the organic EL panel PNL with a weak adhesive. The circularly polarizing plate POL is perforated to such an extent that it is cut in advance by a line CTL or easily separated. Further, the circularly polarizing plate POL has a part of its end part slightly protruding from the end edge of the organic EL panel PNL and is attached to facilitate peeling.
この円偏光板ＰＯＬを有機ＥＬパネルＰＮＬの全面に貼付した状態では有機ＥＬパネルＰＮＬの全面で高品位表示領域として使用でき、円偏光板ＰＯＬを全部剥がした状態では有機ＥＬパネルＰＮＬの全面を鏡機能付加表示領域として使用できる。そして、線ＣＴＬで円偏光板ＰＯＬを分離し、その一方（Ａ部分またはＢ部分）を有機ＥＬパネルＰＮＬに残すことで、円偏光板ＰＯＬが残された領域が高品位表示領域となり、偏光板ＰＯＬが剥離された領域が鏡機能付加表示領域となる。 When this circularly polarizing plate POL is pasted on the entire surface of the organic EL panel PNL, it can be used as a high-quality display area on the entire surface of the organic EL panel PNL. It can be used as a function addition display area. Then, the circularly polarizing plate POL is separated by the line CTL, and one of the portions (A portion or B portion) is left on the organic EL panel PNL, so that the region where the circularly polarizing plate POL is left becomes a high-quality display region. The area where POL is peeled off becomes a mirror function added display area.
図８は、図１と同様の表示装置を車両のバックミラーに適用した場合の表示の具体例を説明する図であり、図８（ａ）は正面図、図８（ｂ）は側面図である。円偏光板ＰＯＬを貼付した高品位表示領域Ｒ１には、図示しない道路交通情報受信手段で受信した重要な交通情報を表示する。円偏光板ＰＯＬを有しない鏡機能付加表示領域Ｒ２は通常のバックミラーとして使用されると共に、必要に応じて任意の情報を表示することができる。 FIG. 8 is a diagram for explaining a specific example of display when the display device similar to FIG. 1 is applied to a vehicle rearview mirror. FIG. 8 (a) is a front view, and FIG. 8 (b) is a side view. is there. In the high-quality display area R1 to which the circularly polarizing plate POL is attached, important traffic information received by road traffic information receiving means (not shown) is displayed. The mirror function-added display region R2 that does not have the circularly polarizing plate POL is used as a normal rearview mirror, and can display arbitrary information as necessary.
図９は、本発明による表示装置の高品位表示領域と鏡機能付加表示領域の他の構成例を説明する図である。そして、図９（ａ）は正面図、図９（ｂ）は側面図、図９（ｃ）は下側面図である。この構成例では、鏡機能付加表示領域Ｒ２を枠状に囲んで高品位表示領域Ｒ１が形成されている。各表示領域の機能は図８と同様である。 FIG. 9 is a diagram illustrating another configuration example of the high-quality display area and the mirror function added display area of the display device according to the present invention. 9A is a front view, FIG. 9B is a side view, and FIG. 9C is a lower side view. In this configuration example, the high-quality display region R1 is formed by surrounding the mirror function additional display region R2 in a frame shape. The function of each display area is the same as in FIG.
図１０は、本発明による表示装置の高品位表示領域と鏡機能付加表示領域のさらに他の構成例を説明する図である。そして、図１０（ａ）は正面図、図１０（ｂ）は側面図、図１０（ｃ）は下側面図である。この構成例では、鏡機能付加表示領域Ｒ２の両側にそれぞれ高品位表示領域Ｒ１が形成されている。各表示領域の機能は図８や図９と同様であるが、この例では、車両のバックミラーに適用した場合に、図示しないカメラで撮影した左右後方の死角部分の画像を鏡機能付加表示領域Ｒ２の両側にある高品位表示領域Ｒ１のそれぞれに表示するような使い方ができる。なお、このとき、鏡機能付加表示領域Ｒ２に後方中央の画像を表示するように構成することも可能である。 FIG. 10 is a diagram for explaining still another configuration example of the high-quality display area and the mirror function-added display area of the display device according to the present invention. 10A is a front view, FIG. 10B is a side view, and FIG. 10C is a lower side view. In this configuration example, high-quality display areas R1 are formed on both sides of the mirror function-added display area R2. The functions of each display area are the same as those in FIGS. 8 and 9, but in this example, when applied to a vehicle rearview mirror, images of left and right rear blind spots taken by a camera (not shown) are mirror function-added display areas. It can be used in such a way that it is displayed on each of the high-quality display areas R1 on both sides of R2. At this time, the rear center image may be displayed in the mirror function additional display region R2.
図１１は、本発明の典型的な適用例の説明図であり、本発明の表示装置を車両のバックミラーに用い、さらに車両の後部に取り付けたカメラの画像をバックミラーとしての表示装置をバックモニタとして用いて表示させるようにしたシステム例である。また、図１２は、図１１におけるバックミラーとしての表示装置の正面図である。このシステムに用いるバックミラーとしての表示装置は図７に示したものと類似しているが、有機ＥＬパネルＰＮＬに貼り付けた円偏光板ＰＯＬは分割されていない。 FIG. 11 is an explanatory diagram of a typical application example of the present invention, in which the display device of the present invention is used as a rearview mirror of a vehicle, and the image of a camera attached to the rear part of the vehicle is used as a rearview mirror. This is an example of a system that is used as a monitor for display. FIG. 12 is a front view of the display device as the rearview mirror in FIG. The display device as a rearview mirror used in this system is similar to that shown in FIG. 7, but the circularly polarizing plate POL attached to the organic EL panel PNL is not divided.
図１１において、車両ＶＨＬの運転席に設置したバックミラーＢ／Ｍは制御装置CONを介して車両の後部に取り付けたCCDカメラCAMに接続されている。バックミラーＢ／Ｍは、その有機ELパネルPNLの表示面の全域に円偏光板POLが貼付されている。 In FIG. 11, the rearview mirror B / M installed in the driver's seat of the vehicle VHL is connected to a CCD camera CAM attached to the rear part of the vehicle via a control device CON. The rear-view mirror B / M has a circularly polarizing plate POL attached to the entire display surface of the organic EL panel PNL.
通常はCCDカメラCAMの撮影画像をバックミラーＢ／Ｍに表示することで後方の死角部分のシーン（様子）を確認することができる。また、バックミラーＢ／Ｍの動きをCCDカメラCAMの視野に連動させることで所望の方向のシーンを確認できる。また、このシステムが正常に機能しなくなったときは円偏光板を剥離して、反射鏡としたバックミラーにすることもできる。 Usually, the scene (mode) of the blind spot behind can be confirmed by displaying the captured image of the CCD camera CAM on the rearview mirror B / M. Further, a scene in a desired direction can be confirmed by linking the movement of the rearview mirror B / M with the visual field of the CCD camera CAM. Further, when this system fails to function normally, the circularly polarizing plate can be peeled off to form a rearview mirror as a reflecting mirror.
ＰＮＬ・・・有機ＥＬパネル、ＰＯＬ・・・円偏光板、ＳＵＢ１・・・ガラス基板（主基板）、ＳＵＢ２・・・ガラス基板（封止缶）、Ｒ１・・・高品位表示領域、Ｒ２・・・鏡機能付加表示領域。
PNL: Organic EL panel, POL: Circular polarizing plate, SUB1: Glass substrate (main substrate), SUB2: Glass substrate (sealing can), R1: High quality display area, R2 ..Mirror function additional display area.
Claims (18)
前記配線／薄膜トランジスタ部に隣接して、前記薄膜トランジスタの各出力電極に接続した透明材料からなる一方の電極が形成されて、該一方の電極の各々の上に画素対応で積層した複数の有機発光層とを形成した画素部とを有し、
前記配線／薄膜トランジスタ部と前記画素部を含む領域を複数画素にわたって共通に覆う他方の電極が配置され、
前記他方の電極を含む前記透明絶縁基板の主面側を封止板で気密に封止されており、
前記透明絶縁基板の一部に円偏光板が、その端部が前記透明絶縁基板の端縁からはみ出すように弱粘着剤で貼付されて高品位表示領域が形成され、かつ、前記他方の電極の前記有機発光層側は鏡面で、前記高品位表示領域を除く部分が鏡機能付加表示領域であることを特徴とする表示装置。 A plurality of thin film transistors arranged in a matrix corresponding to the pixels on the main surface of the transparent insulating substrate, and a wiring / thin film transistor section having wirings for supplying drive signals to the thin film transistors;
Adjacent to the wiring / thin film transistor portion, a plurality of organic light-emitting layers are formed by forming one electrode made of a transparent material connected to each output electrode of the thin film transistor, and laminating correspondingly to each of the one electrode And a pixel portion formed with
The other electrode that covers the wiring / thin film transistor portion and the region including the pixel portion in common over a plurality of pixels is disposed,
The main surface side of the transparent insulating substrate including the other electrode is hermetically sealed with a sealing plate;
A circularly polarizing plate is attached to a part of the transparent insulating substrate, and a high-quality display region is formed by being pasted with a weak adhesive so that an end thereof protrudes from an edge of the transparent insulating substrate , and the other electrode The display device, wherein the organic light emitting layer side is a mirror surface, and a portion excluding the high-quality display region is a mirror function-added display region.
前記配線／薄膜トランジスタ部に隣接して、前記薄膜トランジスタの各出力電極に接続した透明材料からなる一方の電極が形成されて、該一方の電極の各々の上に画素対応で積層した複数の有機発光層とを形成した画素部とを有し、
前記配線／薄膜トランジスタ部と前記画素部を含む領域を複数画素にわたって共通に覆う他方の電極が配置され、
前記他方の電極を含む前記透明絶縁基板の主面側を封止板で気密に封止されており、
前記透明絶縁基板の一部に円偏光板が、その端部が前記透明絶縁基板の端縁からはみ出すように弱粘着剤で貼付されて高品位表示領域が形成され、かつ、前記他方の電極の前記有機発光層側は鏡面で、前記高品位表示領域を除く部分が鏡機能付加表示領域であり、
前記画素部は隣接する配線部に有する低反射性のバンクで囲まれており、前記バンクの内側に前記有機発光層が形成され、
前記高品位表示領域では、前記円偏光板から入射して前記他方の電極で反射する外光が該円偏光板で外部への出射が制限され、前記有機発光層の発光光が主として該円偏光板から外部に出射することを特徴とする表示装置。 A plurality of thin film transistors arranged in a matrix corresponding to the pixels on the main surface of the transparent insulating substrate, and a wiring / thin film transistor section having wirings for supplying drive signals to the thin film transistors;
Adjacent to the wiring / thin film transistor portion, a plurality of organic light-emitting layers are formed by forming one electrode made of a transparent material connected to each output electrode of the thin film transistor, and laminating correspondingly to each of the one electrode And a pixel portion formed with
The other electrode that covers the wiring / thin film transistor portion and the region including the pixel portion in common over a plurality of pixels is disposed,
The main surface side of the transparent insulating substrate including the other electrode is hermetically sealed with a sealing plate;
A circularly polarizing plate is attached to a part of the transparent insulating substrate, and a high-quality display region is formed by being pasted with a weak adhesive so that an end thereof protrudes from an edge of the transparent insulating substrate , and the other electrode The organic light emitting layer side is a mirror surface, the portion excluding the high-quality display area is a mirror function additional display area,
The pixel portion is surrounded by a low-reflective bank in an adjacent wiring portion, and the organic light emitting layer is formed inside the bank,
In the high-definition display region, external light that is incident from the circularly polarizing plate and reflected by the other electrode is restricted from being emitted to the outside by the circularly polarizing plate, and light emitted from the organic light emitting layer is mainly the circularly polarized light. A display device that emits light to the outside from a plate.
前記透明絶縁基板から入射する外光が、前記他方の電極と前記反射率向上層とで反射して該透明絶縁基板から外部に出射することを特徴とする請求項６に記載の表示装置。 The pixel portion is surrounded by a low-reflective bank in an adjacent wiring portion, the organic light emitting layer is formed inside the bank, and at least the main surface side of the transparent insulating substrate in the mirror function added display region The wiring / thin film transistor portion has a reflectance improving layer,
The display device according to claim 6, wherein external light incident from the transparent insulating substrate is reflected by the other electrode and the reflectance improving layer and is emitted to the outside from the transparent insulating substrate.
前記透明絶縁基板から入射する外光が、前記他方の電極と前記ハーフミラー層とで反射して該透明絶縁基板から外部に出射することを特徴とする請求項６に記載の表示装置。 The pixel portion is surrounded by a low-reflective bank in an adjacent wiring portion, the organic light emitting layer is formed inside the bank, and at least the main surface side of the transparent insulating substrate in the mirror function added display region Has a half mirror layer,
The display device according to claim 6, wherein external light incident from the transparent insulating substrate is reflected by the other electrode and the half mirror layer and is emitted to the outside from the transparent insulating substrate.
前記配線／薄膜トランジスタ部に隣接して、前記薄膜トランジスタの各出力電極に接続した透明材料からなる一方の電極が形成されて、該一方の電極の各々の上に画素対応で積層した複数の有機発光層とを形成した画素部とを有し、
前記配線／薄膜トランジスタ部と前記画素部を含む領域を複数画素にわたって共通に覆う他方の電極が配置され、
前記他方の電極を含む前記透明絶縁基板の主面側を封止板で気密に封止されており、
前記透明絶縁基板の一部に円偏光板が、その端部が前記透明絶縁基板の端縁からはみ出すように弱粘着剤で貼付されて高品位表示領域が形成され、かつ、前記他方の電極の前記有機発光層側は鏡面で、前記高品位表示領域を除く部分が鏡機能付加表示領域であり、
前記画素部は隣接する配線部に有する低反射性のバンクで囲まれて、前記バンクの内側に前記有機発光層が形成され、
前記高品位表示領域では、前記円偏光板から入射して前記他方の電極で反射する外光が該円偏光板で外部への出射が制限され、前記有機発光層の発光光が主として該円偏光板から外部に出射する如く構成されており、
前記配線は前記薄膜トランジスタを選択するための走査信号線、選択された薄膜トランジスタに画像データを供給するためのデータ信号線、選択された薄膜トランジスタで駆動される画素に発光用の電流を供給するための電流供給線を少なくとも含み、
前記走査信号線に走査信号を供給する走査信号駆動回路と、前記データ信号線に表示データを供給するデータ信号駆動回路と、前記電流供給線に電流を供給する発光電源回路とを備え、
前記発光電源回路と前記データ信号駆動回路の何れか一方により前記高品位表示領域と前記鏡機能付加表示領域との輝度を制御することを特徴とする表示装置の駆動方法。 A plurality of thin film transistors arranged in a matrix corresponding to the pixels on the main surface of the transparent insulating substrate, and a wiring / thin film transistor section having wirings for supplying drive signals to the thin film transistors;
Adjacent to the wiring / thin film transistor portion, a plurality of organic light-emitting layers are formed by forming one electrode made of a transparent material connected to each output electrode of the thin film transistor, and laminating correspondingly to each of the one electrode And a pixel portion formed with
The other electrode that covers the wiring / thin film transistor portion and the region including the pixel portion in common over a plurality of pixels is disposed,
The main surface side of the transparent insulating substrate including the other electrode is hermetically sealed with a sealing plate;
A circularly polarizing plate is attached to a part of the transparent insulating substrate, and a high-quality display region is formed by being pasted with a weak adhesive so that an end thereof protrudes from an edge of the transparent insulating substrate , and the other electrode The organic light emitting layer side is a mirror surface, the portion excluding the high-quality display area is a mirror function additional display area,
The pixel portion is surrounded by a low-reflective bank in an adjacent wiring portion, and the organic light emitting layer is formed inside the bank,
In the high-definition display region, external light that is incident from the circularly polarizing plate and reflected by the other electrode is restricted from being emitted to the outside by the circularly polarizing plate, and light emitted from the organic light emitting layer is mainly the circularly polarized light. It is configured to exit from the plate to the outside,
The wiring includes a scanning signal line for selecting the thin film transistor, a data signal line for supplying image data to the selected thin film transistor, and a current for supplying a light emission current to a pixel driven by the selected thin film transistor. Including at least a supply line;
A scanning signal driving circuit for supplying a scanning signal to the scanning signal line, a data signal driving circuit for supplying display data to the data signal line, and a light emitting power supply circuit for supplying a current to the current supply line,
A method of driving a display device, wherein the luminance of the high-quality display area and the mirror function-added display area is controlled by one of the light emission power supply circuit and the data signal driving circuit.
17. The display device driving method according to claim 16, wherein both the high-quality display area and the mirror function-added display area are used as a single mirror.
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| JP6078275B2 (en) * | 2012-09-13 | 2017-02-08 | 株式会社カネカ | Organic EL device and organic EL module |
| KR101976068B1 (en) | 2012-12-06 | 2019-05-09 | 삼성디스플레이 주식회사 | Display device and method of manufacturing display device |
| KR102056864B1 (en) | 2013-04-09 | 2019-12-18 | 삼성디스플레이 주식회사 | Organic light emitting display apparatus providing mirror function |
| JP6276086B2 (en) * | 2014-03-27 | 2018-02-07 | 株式会社カネカ | Mirror device with organic EL panel |
| JP6677494B2 (en) * | 2015-01-14 | 2020-04-08 | 日東電工株式会社 | Video display mirror for vehicles |
| JP6224180B2 (en) * | 2016-07-11 | 2017-11-01 | 株式会社カネカ | Lighting device |
| CN109449192A (en) * | 2018-12-07 | 2019-03-08 | 合肥鑫晟光电科技有限公司 | A kind of oled display substrate and display panel |
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| JP2000196718A (en) * | 1998-12-30 | 2000-07-14 | Kenji Sato | Portable electronic unit |
| JP2002215067A (en) * | 2001-01-15 | 2002-07-31 | Hitachi Ltd | Light emitting element, and display device |
| JP2003115388A (en) * | 2001-10-01 | 2003-04-18 | Semiconductor Energy Lab Co Ltd | Light emitting equipment and electronic device, and organic polarizing film |
| JP2003178865A (en) * | 2001-12-11 | 2003-06-27 | Nec Corp | Organic el display and portable terminal using it |
| JP2004030955A (en) * | 2002-06-21 | 2004-01-29 | Hitachi Ltd | Display device |
| JP2004177591A (en) * | 2002-11-26 | 2004-06-24 | Seiko Epson Corp | Display device and electronic apparatus equipped with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000196718A (en) * | 1998-12-30 | 2000-07-14 | Kenji Sato | Portable electronic unit |
| JP2002215067A (en) * | 2001-01-15 | 2002-07-31 | Hitachi Ltd | Light emitting element, and display device |
| JP2003115388A (en) * | 2001-10-01 | 2003-04-18 | Semiconductor Energy Lab Co Ltd | Light emitting equipment and electronic device, and organic polarizing film |
| JP2003178865A (en) * | 2001-12-11 | 2003-06-27 | Nec Corp | Organic el display and portable terminal using it |
| JP2004030955A (en) * | 2002-06-21 | 2004-01-29 | Hitachi Ltd | Display device |
| JP2004177591A (en) * | 2002-11-26 | 2004-06-24 | Seiko Epson Corp | Display device and electronic apparatus equipped with same |
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| Publication number | Publication date |
|---|---|
| JP2006011043A (en) | 2006-01-12 |
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