JP2005182152A - Composite display device and touch panel juxtaposed to the display device - Google Patents

Composite display device and touch panel juxtaposed to the display device Download PDF

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JP2005182152A
JP2005182152A JP2003418151A JP2003418151A JP2005182152A JP 2005182152 A JP2005182152 A JP 2005182152A JP 2003418151 A JP2003418151 A JP 2003418151A JP 2003418151 A JP2003418151 A JP 2003418151A JP 2005182152 A JP2005182152 A JP 2005182152A
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display device
touch panel
conductive film
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Keita Harada
啓太 原田
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Fujitsu Component Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite display device where a depression input part is juxtaposed at the back side on an EL display part for preventing inter-layer peeling, the distortion of an EL display part and the detection failure of a depression input part, and for reducing the overall thickness. <P>SOLUTION: This composite display device 10 is provided with a plate-shaped EL display part 16 having an observation face 12 and a back face 14 and a plate-shaped depression input part 18 arranged on the back face 14 of the EL display part 16. The EL display part 16 is provided with a first substrate 20, an anode layer 22 formed on a back face 20b of the first substrate 20, a light emitting function layer 24 laminated on the anode layer 22 and a cathode layer 26 laminated on the light emitting function layer 24. The depression input part 18 is provided with a second substrate 32, a lower conductive film 34 formed on the surface 32a of the second substrate 32 and an upper conductive film 36 separately arranged so as to be conductively brought into contact with the lower conductive film 34. An insulating coating 44 coating-formed on the back face 14 of the cathode layer 26 by a film formation technology is interposed between the cathode layer 26 of the EL display part 16 and the upper conductive film 36 of the depression input part 18. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、EL表示部と押下入力部とを互いに併設して構成される複合型表示装置に関する。本発明はさらに、表示装置の観察面側に設置されるタッチパネルに関する。   The present invention relates to a composite display device that includes an EL display unit and a pressing input unit. The present invention further relates to a touch panel installed on the observation surface side of the display device.

タッチパネルは、パーソナルコンピュータ、携帯情報端末(PDA)、現金自動預払機(ATM)等の、表示装置を備えたデータ処理装置において、パネル表面の所望位置をオペレータがペンや指で押圧することにより、表示装置における二次元座標データを入力指示する入力装置として知られている。特に、LCD(液晶ディスプレイ)、PDP(プラズマパネル)、CRT(ブラウン管)等の観察面に重ねて設置可能な、それ自体透明な構造を有するタッチパネルが、広く利用されている。   The touch panel is a data processing apparatus equipped with a display device such as a personal computer, a personal digital assistant (PDA), an automatic teller machine (ATM), etc., and an operator presses a desired position on the panel surface with a pen or a finger. It is known as an input device that instructs to input two-dimensional coordinate data in a display device. In particular, touch panels having a transparent structure that can be placed on an observation surface such as an LCD (liquid crystal display), a PDP (plasma panel), and a CRT (CRT) are widely used.

透明構造のタッチパネルは、透明な絶縁基板と絶縁基板表面に設けられる透明な導電膜とを各々に有した一対の板状の検出部材を備えて構成される。それら検出部材は、隙間を介して導電膜同士を対向させた状態で、両絶縁基板の外周縁に沿って帯状に延設される接着剤層を介して、互いに重ね合わせて固定される。通常、オペレータが押圧操作する上側の検出部材の絶縁基板は、可撓性が要求されるので薄層のガラス板や樹脂フィルムから形成される。他方、下側の検出部材の絶縁基板は、基材として剛性が要求される用途では比較的厚みの大きなガラス板や樹脂パネルから形成され、また剛性が要求されない用途では樹脂フィルム等から形成される。   A transparent touch panel includes a pair of plate-like detection members each having a transparent insulating substrate and a transparent conductive film provided on the surface of the insulating substrate. These detection members are fixed by being overlapped with each other via an adhesive layer extending in a strip shape along the outer peripheral edges of both insulating substrates in a state where the conductive films are opposed to each other with a gap. Usually, the insulating substrate of the upper detection member pressed by an operator is formed of a thin glass plate or resin film since flexibility is required. On the other hand, the insulating substrate of the lower detection member is formed from a relatively large glass plate or resin panel in applications that require rigidity as a base material, and is formed from a resin film or the like in applications that do not require rigidity. .

タッチパネルを併設した表示装置において、タッチパネルを透視することによる観察面の視認性低下の問題を解決するために、柔軟な薄板状構造の表示装置を採用するとともに、観察面とは反対側の表示装置の背面に沿ってタッチパネルを設置した複合型表示装置が提案されている。例えば、特許文献1に記載される複合型表示装置は、可撓性を有するエレクトロルミネッセンス(本明細書でELと称する)表示パネルの背面側に、接着層を介してタッチパネルを密着装備したものである。接着層は、EL表示パネルの背面側電極を支持する樹脂フィルム等の支持体の裏面(すなわちEL表示パネルの背面)と、タッチパネルの上側(すなわち押圧側)検出部材の絶縁基板(樹脂フィルム)の表面との間に介在して、両者を相互に固着する。また特許文献1では、EL表示パネルの背面側支持体の裏面に、タッチパネルの押圧側の導電膜を直接形成する構成についても言及されている。   In a display device provided with a touch panel, in order to solve the problem of reduced visibility of the observation surface by seeing through the touch panel, a display device having a flexible thin plate structure is adopted and the display device on the opposite side to the observation surface There has been proposed a composite display device in which a touch panel is installed along the back surface of the display. For example, the composite display device described in Patent Document 1 is a device in which a touch panel is closely attached to the back side of a flexible electroluminescence (referred to as EL in this specification) display panel via an adhesive layer. is there. The adhesive layer is formed on the back surface of the support such as a resin film that supports the back side electrode of the EL display panel (that is, the back surface of the EL display panel) and the insulating substrate (resin film) of the detection member on the upper side (that is, the pressing side) of the touch panel. The two are fixed to each other by being interposed between the surfaces. Patent Document 1 also mentions a configuration in which a conductive film on the pressing side of the touch panel is directly formed on the back side of the back side support of the EL display panel.

ところで、表示装置の観察面側にタッチパネルを設置する構成では、観察面の視認性を向上させるために、一般的なバックライト構造に代えて、観察面をその前方から照らす照明手段(すなわちフロントライト)を設置することが提案されている。例えば、特許文献2に記載される表示部照明付きの情報端末装置では、タッチパネルを有する表示部に対し、ヒンジ部を介して折り畳み自在に取り付けられた蓋部の上端に、表示部の全体を上方から照らす一対のライトが設置されている。また特許文献2には、タッチパネルの使用状況に応じてライトの点灯及び消灯を制御する構成が開示されている。   By the way, in the configuration in which the touch panel is installed on the observation surface side of the display device, in order to improve the visibility of the observation surface, instead of a general backlight structure, illumination means for illuminating the observation surface from the front (that is, the front light) ) Is proposed. For example, in the information terminal device with a display unit illumination described in Patent Document 2, the entire display unit is placed on the upper end of a lid unit that is foldably attached to the display unit having a touch panel via a hinge unit. There is a pair of lights that illuminate from. Patent Document 2 discloses a configuration for controlling lighting and extinguishing of lights in accordance with the usage state of the touch panel.

特開2001−343908号公報JP 2001-343908 A 特開平11−283440号公報JP-A-11-283440

上記特許文献1に記載される複合型表示装置において、EL表示パネルに接着層を介してタッチパネル(すなわち押下入力部)を固着した構成では、EL表示パネルの背面側支持体とタッチパネルの上側(押圧側)絶縁基板とが互いに異なる膨張率を有する材料から形成される場合に、環境温度変化によって接着層に主として剪断方向への応力が加わり、接着層の剥離、EL表示パネルの歪み、押圧側絶縁基板の撓みによるタッチパネルの検出不良等の問題が生じる危惧が有る。また、それぞれに独立した装置であるEL表示パネルとタッチパネルとを互いに密着させる構成であるから、複合型表示装置全体の厚みの増加が懸念される。EL表示パネルの背面側支持体の裏面にタッチパネルの押圧側導電膜を直接形成したとしても、厚みの削減には限界が有る。このような問題は特に、液晶ディスプレイよりも一層の薄形化が可能なEL表示部を有する複合型表示装置において、顕現することが予測される。   In the composite display device described in Patent Document 1, in a configuration in which a touch panel (that is, a pressing input unit) is fixed to an EL display panel via an adhesive layer, a back support body of the EL display panel and an upper side of the touch panel (pressing) Side) When the insulating substrate and the insulating substrate are made of materials having different expansion coefficients, stress in the shearing direction is mainly applied to the adhesive layer due to environmental temperature changes, peeling of the adhesive layer, distortion of the EL display panel, pressure-side insulation There is a risk of problems such as poor detection of the touch panel due to substrate bending. In addition, since the EL display panel and the touch panel, which are independent devices, are in close contact with each other, there is a concern about an increase in the thickness of the entire composite display device. Even if the pressing-side conductive film of the touch panel is directly formed on the back surface of the back-side support of the EL display panel, there is a limit in reducing the thickness. Such a problem is expected to manifest particularly in a composite display device having an EL display unit that can be made thinner than a liquid crystal display.

また、上記特許文献2に記載される表示部照明付きの情報端末装置では、タッチパネルを有する表示部に対し折り畳み自在な蓋部の上端にライトを設置しているから、端末装置全体の寸法及び重量の増加並びに構造の複雑化が問題となる。さらに、表示装置にタッチパネルを併設したこの種のデータ処理装置では、タッチパネルの入力操作時に、表示装置の画面表示以外の手段で、入力の実行を即座に認知できることが、操作確度を向上させる点で所望されている。   Moreover, in the information terminal device with a display part illumination described in the said patent document 2, since the light is installed in the upper end of the cover part which can be folded with respect to the display part which has a touchscreen, the dimension and weight of the whole terminal device Increase in the number and complexity of the structure are problems. Furthermore, in this type of data processing device with a touch panel attached to the display device, it is possible to immediately recognize the execution of input by means other than the screen display of the display device at the time of input operation on the touch panel, in order to improve the operation accuracy. Desired.

本発明の目的は、EL表示部の背面側にタッチパネル構造を有する押下入力部を併設して構成される複合型表示装置において、接着層を介してEL表示部と押下入力部とを相互固着した従来構造における接着層の剥離、EL表示部の歪み、押下入力部の検出不良等の問題を解決でき、しかも装置全体の厚みを可及的に削減できる複合型表示装置を提供することにある。   An object of the present invention is to provide an EL display unit and a press input unit that are bonded to each other through an adhesive layer in a composite display device that includes a press input unit having a touch panel structure on the back side of the EL display unit. An object of the present invention is to provide a composite display device capable of solving problems such as peeling of an adhesive layer, distortion of an EL display portion, and detection failure of a pressing input portion in a conventional structure, and further reducing the thickness of the entire device as much as possible.

本発明の他の目的は、表示装置の観察面側にタッチパネルを設置する構成において、表示装置及びタッチパネルを含む複合システム全体の寸法及び重量の増加を可及的に抑制しつつ、観察面の視認性を向上させることができるとともに、タッチパネルの入力の実行を操作者に即座に認知させることができる簡易構造の照明手段を備えたタッチパネルを提供することにある。   Another object of the present invention is to visually recognize an observation surface while suppressing as much as possible an increase in the size and weight of the entire composite system including the display device and the touch panel in a configuration in which a touch panel is installed on the observation surface side of the display device. It is to provide a touch panel including a lighting device having a simple structure that can improve the performance and allow an operator to immediately recognize execution of input on the touch panel.

上記目的を達成するために、請求項1に記載の発明は、観察面及び観察面の反対側の背面を有する平板状のEL表示部と、EL表示部の該背面に沿って配置される平板状の押下入力部とを備える複合型表示装置において、EL表示部は、観察面を有するとともに光透過性及び可撓性を有する第1基板と、観察面の反対側の第1基板の裏面に形成される光透過性の陽極層と、陽極層に積層される発光機能層と、発光機能層に積層され、背面を有する陰極層とを備え、押下入力部は、第2基板と、第2基板の一表面に形成される下部導電膜と、下部導電膜に対し導通接触可能に対向かつ離間して配置される上部導電膜とを備え、EL表示部の陰極層と押下入力部の上部導電膜との間に、陰極層の背面に成膜技術により被着形成される絶縁皮膜が介在すること、を特徴とする複合型表示装置を提供する。   In order to achieve the above object, the invention described in claim 1 includes a flat EL display unit having an observation surface and a back surface opposite to the observation surface, and a flat plate disposed along the back surface of the EL display unit. In the composite display device including a pressing input unit having a shape, the EL display unit has an observation surface and a light transmitting and flexible first substrate and a back surface of the first substrate opposite to the observation surface. A light-transmitting anode layer formed; a light-emitting functional layer laminated on the anode layer; and a cathode layer laminated on the light-emitting functional layer and having a back surface. A lower conductive film formed on one surface of the substrate; and an upper conductive film disposed opposite to and spaced from the lower conductive film so as to be in conductive contact with each other. An insulating film is formed between the film and the backside of the cathode layer by film formation technology. To it, to provide a composite display apparatus according to claim.

請求項2に記載の発明は、請求項1に記載の複合型表示装置において、押下入力部の上部導電膜が、絶縁皮膜に対し成膜技術により被着形成されている複合型表示装置を提供する。   The invention according to claim 2 provides the composite display device according to claim 1, wherein the upper conductive film of the pressing input portion is deposited on the insulating film by a film forming technique. To do.

請求項3に記載の発明は、透明な絶縁基板及び絶縁基板の一表面に設けられる透明な導電膜をそれぞれに有する一対の検出部材を備え、それら検出部材を導電膜同士が導通接触可能に対向かつ離間する相対配置で互いに組み合わせた状態で、表示装置の観察面に搭載して使用されるタッチパネルにおいて、一対の検出部材の外周領域に設置され、表示装置の動作中に発光するシート状のEL素子を具備することを特徴とするタッチパネルを提供する。   The invention according to claim 3 includes a pair of detection members each having a transparent insulating substrate and a transparent conductive film provided on one surface of the insulating substrate, and the detection members are opposed to each other so that the conductive films can be in conductive contact with each other. In a touch panel that is mounted on the observation surface of the display device in a state of being combined with each other in a spaced relative arrangement, the sheet-like EL is installed in the outer peripheral region of the pair of detection members and emits light during the operation of the display device. Provided is a touch panel including an element.

請求項4に記載の発明は、請求項3に記載のタッチパネルにおいて、一対の検出部材からの入力検出信号に応答してEL素子を発光させる制御回路をさらに具備するタッチパネルを提供する。   The invention according to claim 4 provides the touch panel according to claim 3, further comprising a control circuit for causing the EL element to emit light in response to input detection signals from the pair of detection members.

請求項5に記載の発明は、請求項3又は4に記載のタッチパネルにおいて、EL素子に隣接して配置され、EL素子が発する光を、表示装置の観察面に重なるタッチパネルの検出機能領域に導く導光部材をさらに具備するタッチパネルを提供する。   According to a fifth aspect of the present invention, in the touch panel according to the third or fourth aspect, the light emitted from the EL element is guided to the detection function area of the touch panel that is disposed adjacent to the EL element and overlaps the observation surface of the display device. Provided is a touch panel further comprising a light guide member.

請求項1に記載の発明によれば、EL表示部と押下入力部とが、両者間に支持体を介在させること無く、EL表示部の陰極層に直接に成膜される絶縁皮膜を介して相互に連結されるから、例えば既述の特許文献1に記載されるような、EL表示パネルの背面側支持体とタッチパネルの上側絶縁基板とが接着層を介して相互固着される従来構造における、背面側支持体と上側絶縁基板との膨張率の差に起因した接着層の剥離、EL表示パネルの歪み、タッチパネルの検出不良等の問題が確実に解決される。しかも、絶縁皮膜は、EL表示部と押下入力部とを相互に絶縁するための必須構成要素であるとともに、第1基板と第2基板との間に形成される積層皮膜構造の一要素であるから、それぞれに独立した装置構成を有するEL表示パネルとタッチパネルとを互いに密着させる従来構造に比べ、EL表示パネルの背面側支持体とタッチパネルの上側絶縁基板との双方を省略でき、その結果、複合型表示装置の全体の厚みを可及的に削減できる。   According to the first aspect of the present invention, the EL display unit and the pressing input unit are interposed via the insulating film directly formed on the cathode layer of the EL display unit without interposing a support therebetween. Since they are connected to each other, for example, as described in Patent Document 1 described above, in the conventional structure in which the back side support of the EL display panel and the upper insulating substrate of the touch panel are mutually fixed via an adhesive layer. Problems such as peeling of the adhesive layer, distortion of the EL display panel, and detection failure of the touch panel due to the difference in expansion coefficient between the back side support and the upper insulating substrate are surely solved. In addition, the insulating film is an essential component for insulating the EL display unit and the pressing input unit from each other, and is an element of a laminated film structure formed between the first substrate and the second substrate. Therefore, compared with the conventional structure in which the EL display panel and the touch panel having independent device configurations are in close contact with each other, both the back side support body of the EL display panel and the upper insulating substrate of the touch panel can be omitted. The overall thickness of the type display device can be reduced as much as possible.

請求項2に記載の発明によれば、第1基板と第2基板との間に形成される積層皮膜構造の製造工程が簡略化されるとともに、押下入力部の上部導電膜の成形精度を確保できる。   According to the second aspect of the present invention, the manufacturing process of the laminated film structure formed between the first substrate and the second substrate is simplified, and the forming accuracy of the upper conductive film of the pressing input portion is ensured. it can.

請求項3に記載の発明によれば、EL素子は、タッチパネルを併設する表示装置の動作中に発光して、表示装置の観察面の主表示領域に重畳するタッチパネルの検出機能領域を照射するフロントライトとして機能したり、タッチパネルの入力の実行をオペレータに認知させる手段として機能したりすることができる。このようなフロントライト構造及び入力認知手段は、場所を取らない小型軽量のものであるから、タッチパネル及び表示装置を含む複合システム全体の寸法及び重量の増加を可及的に抑制しつつ、観察面の視認性及びタッチパネルの操作確度を向上させる効果を奏する。   According to the invention described in claim 3, the EL element emits light during operation of the display device provided with the touch panel, and irradiates the detection function region of the touch panel that is superimposed on the main display region of the observation surface of the display device. It can function as a light, or it can function as a means for allowing the operator to recognize the input of the touch panel. Since such a front light structure and input recognition means are small and light without taking up space, the increase in size and weight of the entire composite system including the touch panel and the display device is suppressed as much as possible, and the observation surface is There is an effect of improving the visibility and the operation accuracy of the touch panel.

請求項4に記載の発明によれば、EL素子及びその制御回路を追加するだけの極めて簡易な構造により、タッチパネルの入力操作時に、正確な入力を行う都度、EL素子を発光させて、オペレータに入力の実行を即座に認知させることができる。   According to the invention described in claim 4, the EL element is caused to emit light each time an accurate input is performed at the time of an input operation on the touch panel by an extremely simple structure in which only the EL element and its control circuit are added. The execution of input can be recognized immediately.

請求項5に記載の発明によれば、EL素子が発する光を効率的に検出機能領域に導いて、観察面の視認性を著しく向上させることができる。   According to the invention described in claim 5, the light emitted from the EL element can be efficiently guided to the detection function region, and the visibility of the observation surface can be remarkably improved.

以下、添付図面を参照して、本発明の実施の形態を詳細に説明する。全図面に渡り、対応する構成要素には共通の参照符号を付す。
図面を参照すると、図1及び図2は、本発明の一実施形態による複合型表示装置10の構成を、それぞれ模式図的に示す断面図及び斜視図である。
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Corresponding components are denoted by common reference symbols throughout the drawings.
Referring to the drawings, FIGS. 1 and 2 are a cross-sectional view and a perspective view, respectively, schematically showing the configuration of a composite display device 10 according to an embodiment of the present invention.

複合型表示装置10は、観察面12及び観察面12の反対側の背面14を有する平板状のEL表示部16と、EL表示部16の背面14に沿って配置される平板状の押下入力部18とを備える。EL表示部16は、一方の表面20aが観察面12を構成する光透過性及び可撓性を有する第1基板20と、観察面12とは反対側の第1基板20の裏面20bに薄膜状に形成される光透過性の陽極層22と、第1基板20から見て陽極層22の上に薄膜状に積層形成される発光機能層24と、第1基板20から見て発光機能層24の上に薄膜状に積層形成され、発光機能層24とは反対側の面26aが背面14を構成する陰極層26とを備える。   The composite display device 10 includes a flat EL display unit 16 having an observation surface 12 and a back surface 14 opposite to the observation surface 12, and a flat press input unit arranged along the back surface 14 of the EL display unit 16. 18. The EL display unit 16 has a light-transmitting and flexible first substrate 20 having one surface 20a constituting the observation surface 12, and a thin film on the back surface 20b of the first substrate 20 opposite to the observation surface 12. A light-transmitting anode layer 22 formed on the first substrate 20, a light-emitting functional layer 24 formed in a thin film on the anode layer 22 when viewed from the first substrate 20, and a light-emitting functional layer 24 when viewed from the first substrate 20. A surface 26 a opposite to the light emitting functional layer 24 is provided with a cathode layer 26 constituting the back surface 14.

第1基板20は、PET(ポリエチレンテレフタレート)、PC(ポリカーボネート)等の樹脂材料から作製される。陽極層22は、ITO(酸化インジウム錫)等の導電性皮膜から形成される。発光機能層24は、陽極層24に隣接する正孔輸送層28と、陰極層26に隣接する電子輸送性の発光層30とを含んで構成され、正孔輸送層28としてはNPB(N,N-di(naphthalene-1-yl)-N,N-diphenyl-benzidene)等が、また発光層30としてはAlq(アルミニウムキノリノール錯体)等が使用される。陰極層26は、Mg(マグネシウム)合金等の導電性皮膜から形成される。 The first substrate 20 is made of a resin material such as PET (polyethylene terephthalate) or PC (polycarbonate). The anode layer 22 is formed from a conductive film such as ITO (indium tin oxide). The light emitting functional layer 24 includes a hole transport layer 28 adjacent to the anode layer 24 and an electron transporting light emitting layer 30 adjacent to the cathode layer 26. As the hole transport layer 28, NPB (N, N-di (naphthalene-1-yl) -N, N-diphenyl-benzidene) and the like, and Alq 3 (aluminum quinolinol complex) and the like are used as the light emitting layer 30. The cathode layer 26 is formed from a conductive film such as an Mg (magnesium) alloy.

陽極層24、正孔輸送層28、発光層30及び陰極層26は、第1基板20の裏面20bに対し順次、例えば真空蒸着法等の成膜技術によって積層形成される。陽極層24と陰極層26との間に直流電圧を印加すると、陽極層24から注入された正孔が正孔輸送層28を経て発光層30に到達する一方、陰極層26から注入された電子が発光層30に達し、それら正孔と電子とが発光層30で再結合することにより所定波長の光が発光層30に生じる。なお、本発明は、EL表示部16の構成を限定するものでなく、EL表示装置として従来知られている種々の構成をEL表示部に採用できる。   The anode layer 24, the hole transport layer 28, the light emitting layer 30, and the cathode layer 26 are sequentially stacked on the back surface 20 b of the first substrate 20 by a film forming technique such as a vacuum evaporation method. When a DC voltage is applied between the anode layer 24 and the cathode layer 26, holes injected from the anode layer 24 reach the light emitting layer 30 through the hole transport layer 28, while electrons injected from the cathode layer 26. Reaches the light emitting layer 30, and these holes and electrons recombine in the light emitting layer 30, whereby light having a predetermined wavelength is generated in the light emitting layer 30. The present invention does not limit the configuration of the EL display unit 16, and various configurations conventionally known as EL display devices can be employed in the EL display unit.

押下入力部18は、一般的なタッチパネルに類似した構成を有するものであり、第2基板32と、第2基板32の一表面32aに形成される下部導電膜34と、下部導電膜34に対し導通接触可能に対向かつ離間して配置される上部導電膜36とを備える。下部導電膜34の表面には、電気絶縁性の多数のドットスペーサ38が分散配置される。また下部導電膜34と上部導電膜36とは、両導電膜34、36の外周縁に沿って帯状に延設される電気絶縁性の接着剤層40によって相互に固定される。接着剤層40は、両導電膜34、36の間に予め定めた寸法の隙間42を確保する。またドットスペーサ38は、後述するように、上部導電膜36側の構成要素群の自重による変形を抑制して隙間42を維持する一方で、上部導電膜36側の構成要素群が押圧力下で変形したときには押圧位置における両導電膜34、36の短絡を許容する。   The press input unit 18 has a configuration similar to that of a general touch panel. The press input unit 18 has a second substrate 32, a lower conductive film 34 formed on one surface 32 a of the second substrate 32, and the lower conductive film 34. And an upper conductive film 36 disposed opposite to and spaced apart from each other so as to be in conductive contact. A large number of electrically insulating dot spacers 38 are distributed on the surface of the lower conductive film 34. The lower conductive film 34 and the upper conductive film 36 are fixed to each other by an electrically insulating adhesive layer 40 extending in a strip shape along the outer peripheral edges of the conductive films 34 and 36. The adhesive layer 40 ensures a gap 42 having a predetermined dimension between the conductive films 34 and 36. Further, as will be described later, the dot spacer 38 suppresses deformation due to the weight of the component group on the upper conductive film 36 side and maintains the gap 42, while the component group on the upper conductive film 36 side is under a pressing force. When deformed, a short circuit between the conductive films 34 and 36 at the pressing position is allowed.

第2基板32は、ガラスや樹脂材料(PET等)から作製される。下部導電膜34及び上部導電膜36は、チタン等の比較的高強度の導電性皮膜から形成される。下部導電膜34は、第2基板32の表面32aに対し、スパッタリング等の成膜技術によって形成される。多数のドットスペーサ38は、例えば紫外線硬化樹脂材料からフォトレジスト法により、下部導電膜34上に所定パターンで形成される。また図示しないが、下部導電膜34及び上部導電膜36上には、それら導電膜34、36の互いに90度異なる対向辺に沿って配置される電極対と、導電膜34、36から絶縁してそれぞれの電極対に接続される配線ストリップとが、例えばスクリーン印刷法によりパターン形成される。   The second substrate 32 is made of glass or a resin material (PET or the like). The lower conductive film 34 and the upper conductive film 36 are formed of a relatively high strength conductive film such as titanium. The lower conductive film 34 is formed on the surface 32a of the second substrate 32 by a film forming technique such as sputtering. A large number of dot spacers 38 are formed in a predetermined pattern on the lower conductive film 34 by, for example, a photoresist method from an ultraviolet curable resin material. Although not shown, the lower conductive film 34 and the upper conductive film 36 are insulated from the conductive films 34 and 36 and the electrode pairs disposed along opposite sides of the conductive films 34 and 36 that are different from each other by 90 degrees. A wiring strip connected to each electrode pair is patterned by, for example, a screen printing method.

複合型表示装置10では、その特徴的構成として、EL表示部16の陰極層26と押下入力部18の上部導電膜36との間に、陰極層26の面26aすなわち背面14に成膜技術により被着形成される絶縁皮膜44が介在する。絶縁皮膜44は、例えばSiO(二酸化ケイ素)からなり、陰極層26の背面14に対しスパッタリング等の成膜技術によって形成される。さらに、押下入力部18の上部導電膜36が、絶縁皮膜44に対しスパッタリング等の成膜技術により被着形成される。絶縁皮膜44は、陰極層26と上部導電膜36との間を確実に絶縁できる厚み及び材質を有する。 In the composite display device 10, as a characteristic configuration, the surface 26 a of the cathode layer 26, that is, the back surface 14 is formed between the cathode layer 26 of the EL display unit 16 and the upper conductive film 36 of the push-down input unit 18 by a film formation technique. An insulating film 44 to be deposited is interposed. The insulating film 44 is made of, for example, SiO 2 (silicon dioxide), and is formed on the back surface 14 of the cathode layer 26 by a film forming technique such as sputtering. Further, the upper conductive film 36 of the pressing input unit 18 is deposited on the insulating film 44 by a film forming technique such as sputtering. The insulating film 44 has a thickness and a material that can reliably insulate the cathode layer 26 from the upper conductive film 36.

複合型表示装置10を作製する際には、EL表示部16の第1基板20の裏面20bに対し、陽極層24、正孔輸送層28、発光層30、陰極層26、絶縁皮膜44及び上部導電膜36をこの順序で、いずれも成膜技術によって積層形成する。この状態で、上部導電膜36の表面に、電極対及び配線ストリップをパターン形成する。他方、押下入力部18の第2基板32の表面32aに、下部導電膜34を成膜し、下部導電膜34の表面に、多数のドットスペーサ38を設けるとともに電極対及び配線ストリップをパターン形成する。そして、これら上部導電膜36側の構成要素群と下部導電膜34側の構成要素群とを、両導電膜34、36を接着剤層40により相互に固着することにより、互いに固定的に連結し、それにより複合型表示装置10が完成する。   When the composite display device 10 is manufactured, the anode layer 24, the hole transport layer 28, the light emitting layer 30, the cathode layer 26, the insulating film 44, and the upper part are formed on the back surface 20 b of the first substrate 20 of the EL display unit 16. The conductive films 36 are laminated in this order by a film forming technique. In this state, electrode pairs and wiring strips are formed in a pattern on the surface of the upper conductive film 36. On the other hand, a lower conductive film 34 is formed on the surface 32a of the second substrate 32 of the pressing input unit 18, a number of dot spacers 38 are provided on the surface of the lower conductive film 34, and electrode pairs and wiring strips are patterned. . The component group on the upper conductive film 36 side and the component group on the lower conductive film 34 side are fixedly connected to each other by fixing the conductive films 34 and 36 to each other with the adhesive layer 40. Thus, the composite display device 10 is completed.

上記構成を有する複合型表示装置10は、柔軟な薄板状構造を有するEL表示部16の背面14に沿って、二次元座標データ入力用の押下入力部18を設置したものであるから、表示装置の観察面側にタッチパネルを設置した従来の複合型表示装置に比べて、タッチパネルを透視することによる観察面の視認性低下の問題が解決される。また、押下入力部18に透視機能が要求されないので、押下入力部18の検出要素である下部及び上部導電膜34、36に、ITO等の透明導電膜に比べて機械的強度に優れた不透明な導電性皮膜を使用することができ、それにより押下入力部18の耐久性を向上させることができる。   Since the composite display device 10 having the above-described configuration is provided with a pressing input unit 18 for inputting two-dimensional coordinate data along the back surface 14 of the EL display unit 16 having a flexible thin plate-like structure. Compared to a conventional composite display device in which a touch panel is installed on the viewing surface side, the problem of reduced visibility of the viewing surface caused by seeing through the touch panel is solved. Further, since the push-down input unit 18 is not required to have a fluoroscopic function, the lower and upper conductive films 34 and 36 that are detection elements of the push-down input unit 18 are opaque with excellent mechanical strength compared to a transparent conductive film such as ITO. A conductive film can be used, whereby the durability of the pressing input unit 18 can be improved.

さらに複合型表示装置10によれば、EL表示部16と押下入力部18とが、両者間に樹脂フィルム等の支持体を介在させること無く、EL表示部16の陰極層26に直接に成膜される絶縁皮膜44を介して相互に連結されるから、例えば既述の特許文献1に記載されるような、EL表示パネルの背面側支持体とタッチパネルの上側絶縁基板とが接着層を介して相互固着される従来構造における、背面側支持体と上側絶縁基板との膨張率の差に起因した接着層の剥離、EL表示パネルの歪み、タッチパネルの検出不良等の問題が確実に解決される。しかも、絶縁皮膜44は、EL表示部16と押下入力部18とを相互に絶縁するための必須構成要素であるとともに、一対の基板20、32の間で成膜技術によって順次形成される積層皮膜構造の一要素であるから、それぞれに独立した装置構成を有するEL表示パネルとタッチパネルとを互いに密着させる従来構造に比べ、EL表示パネルの背面側支持体とタッチパネルの上側絶縁基板との双方を省略でき、その結果、複合型表示装置10の全体の厚みを可及的に削減できる。したがって複合型表示装置10によれば、EL表示部16が本質的に奏する薄型化の効果を一層促進することができる。   Furthermore, according to the composite display device 10, the EL display unit 16 and the pressing input unit 18 are directly formed on the cathode layer 26 of the EL display unit 16 without interposing a support such as a resin film between them. Are connected to each other via the insulating film 44, for example, the back side support of the EL display panel and the upper side insulating substrate of the touch panel as described in Patent Document 1 described above, for example, via the adhesive layer Problems such as peeling of the adhesive layer, distortion of the EL display panel, and detection failure of the touch panel due to the difference in expansion coefficient between the back-side support and the upper insulating substrate in the mutually fixed conventional structure are reliably solved. In addition, the insulating film 44 is an essential component for insulating the EL display unit 16 and the pressing input unit 18 from each other, and is a laminated film sequentially formed between the pair of substrates 20 and 32 by a film forming technique. Since it is an element of the structure, both the back support of the EL display panel and the upper insulating substrate of the touch panel are omitted compared to the conventional structure in which the EL display panel and the touch panel having independent device configurations are in close contact with each other. As a result, the overall thickness of the composite display device 10 can be reduced as much as possible. Therefore, according to the composite display device 10, it is possible to further promote the thinning effect inherently exhibited by the EL display unit 16.

図3及び図4は、表示装置の観察面側に設置される本発明の他の実施形態によるタッチパネル50を示す。タッチパネル50は、透明な絶縁基板52及び絶縁基板52の一表面52aに設けられる透明な導電膜54を有する第1検出部材56と、透明な絶縁基板58及び絶縁基板58の一表面58aに設けられる透明な導電膜60を有する第2検出部材62とを備える。それら第1及び第2検出部材56、62は、各々の導電膜54、60同士を隙間64を介し対向させた状態で、両導電膜54、60の周縁に沿って枠状に延設される接着剤層66を介して互いに固定される。   3 and 4 show a touch panel 50 according to another embodiment of the present invention installed on the observation surface side of the display device. The touch panel 50 is provided on a first insulating member 52 having a transparent insulating substrate 52 and a transparent conductive film 54 provided on one surface 52 a of the insulating substrate 52, and on the transparent insulating substrate 58 and one surface 58 a of the insulating substrate 58. And a second detection member 62 having a transparent conductive film 60. The first and second detection members 56 and 62 extend in a frame shape along the peripheral edges of the conductive films 54 and 60 with the conductive films 54 and 60 facing each other with a gap 64 therebetween. They are fixed to each other via an adhesive layer 66.

第1検出部材56は、オペレータによって押圧操作される上側検出部材であり、その絶縁基板52は、PET、PC等の可撓性に富む樹脂フィルムから形成される。これに対し第2検出部材62は、LCD、PDP、CRT等の表示装置68の観察面70に隣接配置される下側検出部材であり、その絶縁基板58は、ガラス板、プラスチック板、樹脂フィルム等から形成される。また、各検出部材56、62の導電膜54、60は、ITO等の導電性皮膜からなり、例えば真空蒸着法によって各絶縁基板52、58の表面52a、58aに被着形成される。   The first detection member 56 is an upper detection member that is pressed by an operator, and the insulating substrate 52 is formed of a flexible resin film such as PET or PC. On the other hand, the second detection member 62 is a lower detection member disposed adjacent to the observation surface 70 of the display device 68 such as an LCD, PDP, or CRT, and the insulating substrate 58 is a glass plate, a plastic plate, or a resin film. Etc. are formed. The conductive films 54 and 60 of the detection members 56 and 62 are made of a conductive film such as ITO, and are formed on the surfaces 52a and 58a of the insulating substrates 52 and 58 by, for example, vacuum deposition.

第2検出部材62の導電膜60上には、電気絶縁性の多数のドットスペーサ72が分散配置される。それらドットスペーサ72は、第1検出部材56の自重による変形を抑制して隙間64を維持する一方で、第1検出部材56が押圧力下で変形したときには押圧位置における両導電膜54、60の短絡を許容する。多数のドットスペーサ72は、例えば紫外線硬化樹脂材料からフォトレジスト法により、導電膜60上に所定パターンで形成される。さらに、第1及び第2検出部材56、62の各々の導電膜54、60上には、それら導電膜54、60のそれぞれの対向辺に沿って互いに90度異なる位置に配置される各一対の電極74、76と、導電膜54、60から絶縁してそれら電極対74、76に接続される第1及び第2配線ストリップ(図示せず)とが、例えばスクリーン印刷法によりパターン形成される。   On the conductive film 60 of the second detection member 62, a large number of electrically insulating dot spacers 72 are distributed. The dot spacers 72 suppress the deformation of the first detection member 56 due to its own weight and maintain the gap 64, while the first detection member 56 is deformed under a pressing force when the two conductive films 54 and 60 at the pressing position are deformed. Allow short circuit. A large number of dot spacers 72 are formed in a predetermined pattern on the conductive film 60 by, for example, a photoresist method from an ultraviolet curable resin material. Further, a pair of each of the first and second detection members 56 and 62 is disposed on the conductive films 54 and 60 at positions different from each other by 90 degrees along the opposing sides of the conductive films 54 and 60. The electrodes 74 and 76 and first and second wiring strips (not shown) insulated from the conductive films 54 and 60 and connected to the electrode pairs 74 and 76 are patterned by, for example, screen printing.

タッチパネル50は、第1及び第2検出部材56、62の外周領域に設置されるシート状のEL素子78を備える。EL素子78は、タッチパネル50の接着剤層66に対応する枠状輪郭を有し、タッチパネル50の非検出機能領域(平面視で接着剤層66に重畳する領域)80に沿って、第1検出部材56の絶縁基板52の外面52bに例えば接着剤層(図示せず)を介して固定的に載置される。EL素子78は、タッチパネル50を併設する表示装置68の動作中に発光して、表示装置68の観察面70の主表示領域に重畳するタッチパネル50の検出機能領域(平面視で接着剤層66の内側の領域)82を照射したり、タッチパネル50の入力の実行をオペレータに認知させたりするように作用する。   The touch panel 50 includes a sheet-like EL element 78 installed in the outer peripheral area of the first and second detection members 56 and 62. The EL element 78 has a frame-like outline corresponding to the adhesive layer 66 of the touch panel 50, and is first detected along the non-detection function area 80 (area overlapping the adhesive layer 66 in plan view) of the touch panel 50. The member 56 is fixedly placed on the outer surface 52b of the insulating substrate 52 through, for example, an adhesive layer (not shown). The EL element 78 emits light during operation of the display device 68 provided with the touch panel 50 and overlaps with the main display region of the observation surface 70 of the display device 68 (the adhesive layer 66 of the adhesive layer 66 in a plan view). It acts to irradiate (inner area) 82 or to allow the operator to recognize the input of touch panel 50.

上記構成を有するタッチパネル50では、例えば、表示装置68を起動すると同時にEL素子78に電圧を印加してEL素子78を継続的に発光させるように構成すれば、第1及び第2検出部材56、62の外周領域に設置されるシート状のEL素子78が、表示装置68の観察面70の主表示領域に重畳する検出機能領域82を照射するフロントライトとして機能する。このようなフロントライト構造は、場所を取らない小型軽量のものであるから、タッチパネル50及び表示装置68を含む複合システム全体の寸法及び重量の増加を可及的に抑制しつつ、観察面70の視認性を向上させることができる。或いはタッチパネル50を、その入力操作の都度、EL素子78に電圧を印加してEL素子78を断続的に発光させるように構成すれば、シート状のEL素子78が、表示装置68の画面表示以外にオペレータに入力の実行を即座に認知させる手段として機能する。このような入力認知手段によれば、複合システム全体の寸法及び重量の増加を可及的に抑制しつつ、タッチパネル50の操作確度を向上させることができる。   In the touch panel 50 having the above-described configuration, for example, if the display device 68 is activated and a voltage is applied to the EL element 78 to cause the EL element 78 to emit light continuously, the first and second detection members 56, The sheet-like EL element 78 installed in the outer peripheral area 62 functions as a front light that irradiates the detection function area 82 that overlaps the main display area of the observation surface 70 of the display device 68. Since such a front light structure is small and light and does not take up space, an increase in the size and weight of the entire composite system including the touch panel 50 and the display device 68 is suppressed as much as possible, and the observation surface 70 is reduced. Visibility can be improved. Alternatively, if the touch panel 50 is configured such that a voltage is applied to the EL element 78 to cause the EL element 78 to emit light intermittently for each input operation, the sheet-like EL element 78 is not displayed on the screen of the display device 68. It functions as a means for allowing the operator to immediately recognize the execution of input. According to such an input recognition means, it is possible to improve the operation accuracy of the touch panel 50 while suppressing as much as possible an increase in the size and weight of the entire complex system.

EL素子78を、検出機能領域82を照射するフロントライトとして使用する場合は、EL素子78に隣接して導光部材84を設置することが有利である。導光部材84は、EL素子78に合致する輪郭を有して、絶縁基板52とは反対側でEL素子78の表面78aに固定的に載置され、EL素子78が発する光を検出機能領域82に導くように作用する。それにより、少ない電力でもEL素子78が発する光を効率的に使用して、観察面70の視認性を著しく向上させることができる。導光部材84の構成は、導光板として公知のプリズム状の構成を採用できる。   When the EL element 78 is used as a front light that irradiates the detection function region 82, it is advantageous to install the light guide member 84 adjacent to the EL element 78. The light guide member 84 has a contour that matches the EL element 78, is fixedly placed on the surface 78 a of the EL element 78 on the side opposite to the insulating substrate 52, and detects light emitted from the EL element 78. 82 to act as a guide. As a result, the light emitted from the EL element 78 can be efficiently used with a small amount of power, and the visibility of the observation surface 70 can be significantly improved. As the configuration of the light guide member 84, a known prismatic configuration as the light guide plate can be adopted.

EL素子78を、タッチパネル50の入力の実行をオペレータに認知させる手段として使用する場合は、第1及び第2検出部材56、62からの入力検出信号に応答してEL素子78を発光させる制御回路86を備えることが有利である。制御回路86は、第1及び第2検出部材56、62における入力情報を検出する入力情報検出部88と、入力情報検出部88で検出された入力情報に基づき、EL素子78へ印加する電圧を調整してEL素子78の発光を制御する発光制御部90とを備える。発光制御部90は、タッチパネル50が正確に入力操作されたとき(すなわち第1及び第2検出部材56、62が相互に導通接触したとき)に、EL素子78を発光させるように構成できる。なお、入力情報検出部88は、検出した入力情報を二次元座標データとして処理するタッチパネル50の処理部(CPU、メモリ等を含む)92に接続され、処理部92がインタフェース部94を介して、パーソナルコンピュータ等のデータ処理装置96に接続される。   When the EL element 78 is used as a means for allowing an operator to recognize the input of the touch panel 50, a control circuit that causes the EL element 78 to emit light in response to input detection signals from the first and second detection members 56 and 62. Advantageously, 86 is provided. The control circuit 86 detects the input information in the first and second detection members 56, 62 and the voltage applied to the EL element 78 based on the input information detected by the input information detection unit 88. A light emission control unit 90 that adjusts and controls light emission of the EL element 78. The light emission control unit 90 can be configured to cause the EL element 78 to emit light when the touch panel 50 is accurately input (that is, when the first and second detection members 56 and 62 are in conductive contact with each other). The input information detection unit 88 is connected to a processing unit (including a CPU and a memory) 92 of the touch panel 50 that processes the detected input information as two-dimensional coordinate data. The processing unit 92 is connected via the interface unit 94. It is connected to a data processing device 96 such as a personal computer.

上記構成によれば、タッチパネル50の入力操作時に、正確な入力を行う都度、EL素子78を発光させることにより、オペレータに入力の実行を即座に認知させることができる。したがって、EL素子78及びその制御回路(実質的には発光制御部90)を追加するだけの極めて簡易な構造により、タッチパネル50の操作確度を著しく向上させることができる。   According to the above configuration, whenever an accurate input is performed on the touch panel 50, the EL element 78 is caused to emit light each time an accurate input is performed, thereby allowing the operator to immediately recognize the execution of the input. Therefore, the operation accuracy of the touch panel 50 can be remarkably improved by an extremely simple structure in which only the EL element 78 and its control circuit (substantially the light emission control unit 90) are added.

なおタッチパネル50では、フロントライト及び入力認知手段のいずれか一方の機能を有する1つのEL素子78を装備することもできるし、それら機能を分掌する2つ以上のEL素子78を装備することもできる。1つの機能を有するEL素子78は、図4及び図5(a)に示すように非検出機能領域80の全体に延設される枠状輪郭を有することもできるし、或いは図5(b)に示すように非検出機能領域80の所望箇所に配置される帯状輪郭を有することもできる。後者の場合、同一機能の複数個の帯状のEL素子78を使用することもできる。また、機能を分掌する2つ以上のEL素子78は、例えば図5(c)に示すように、フロントライト機能を有する平面視コ字状のEL素子781と、入力認知機能を有する平面視矩形状のEL素子782を組み合わせて使用することもできる。   Note that the touch panel 50 can be equipped with one EL element 78 having the function of either the front light or the input recognition means, or can be equipped with two or more EL elements 78 that divide these functions. . The EL element 78 having one function can have a frame-like outline extending over the entire non-detection functional region 80 as shown in FIGS. 4 and 5A, or FIG. As shown in FIG. 4, it may have a belt-like contour arranged at a desired location in the non-detection function region 80. In the latter case, a plurality of strip-shaped EL elements 78 having the same function can be used. In addition, as shown in FIG. 5C, for example, two or more EL elements 78 that divide the functions include an EL element 781 having a U-shape in a plan view having a front light function and a rectangular in a plan view having an input recognition function. A combination of the shaped EL elements 782 can also be used.

図1に示す複合型表示装置10を、以下の構成で作製した。
まず、表面20a(観察面12)にハードコート処理を施したPETフィルムからなる第1基板20の裏面20bに、スパッタリングにより100nm厚のITO製の陽極層22を成膜した。次に、陽極層22の露出面に、抵抗加熱式真空蒸着により50nm厚のNPB製の正孔輸送層28を成膜した。次に、正孔輸送層28の露出面に、抵抗加熱式真空蒸着により50nm厚のAlq製の電子輸送性発光層30を成膜した。次に、発光層30の露出面に、抵抗加熱式真空蒸着(二元同時蒸着)により150nm厚のMg−Ag(マグネシウム銀合金)製の陰極層26を成膜した。次に、陰極層26の面26a(背面14)に、スパッタリングにより500nm厚のSiO製の絶縁皮膜44を成膜した。次に、絶縁皮膜44の露出面に、スパッタリングにより100nm厚のTi(チタン)製の上部導電膜36を成膜した。上部導電膜36の露出面には、スクリーン印刷により銀ペーストからなる電極対及び配線ストリップを形成した。
A composite display device 10 shown in FIG. 1 was produced with the following configuration.
First, an ITO anode layer 22 having a thickness of 100 nm was formed by sputtering on the back surface 20b of the first substrate 20 made of a PET film that had been hard-coated on the surface 20a (observation surface 12). Next, a 50 nm thick NPB hole transport layer 28 was formed on the exposed surface of the anode layer 22 by resistance heating vacuum deposition. Next, an electron transporting light emitting layer 30 made of Alq 3 having a thickness of 50 nm was formed on the exposed surface of the hole transport layer 28 by resistance heating vacuum deposition. Next, a cathode layer 26 made of Mg—Ag (magnesium silver alloy) having a thickness of 150 nm was formed on the exposed surface of the light emitting layer 30 by resistance heating vacuum deposition (binary simultaneous vapor deposition). Next, an insulating film 44 made of SiO 2 having a thickness of 500 nm was formed on the surface 26a (back surface 14) of the cathode layer 26 by sputtering. Next, an upper conductive film 36 made of Ti (titanium) having a thickness of 100 nm was formed on the exposed surface of the insulating film 44 by sputtering. On the exposed surface of the upper conductive film 36, electrode pairs and wiring strips made of silver paste were formed by screen printing.

他方、ソーダライムガラスからなる第2基板32の表面32aに、スパッタリングにより100nm厚のTi(チタン)製の下部導電膜34を成膜した。下部導電膜34の露出面には、スクリーン印刷により銀ペーストからなる電極対及び配線ストリップを形成するとともに、フォトレジスト法により紫外線硬化樹脂材料からなる複数のドットスペーサ38を形成した。最後に、上部導電膜36と下部導電膜34とを接着剤層40により相互に固着することにより、第1基板20に支持される上部導電膜36側の構成要素群と第2基板32に支持される下部導電膜34側の構成要素群とを互いに固定的に連結し、それにより複合型表示装置10を作製した。完成した複合型表示装置10は、層間剥離、EL表示パネルの歪み、タッチパネルの検出不良等を生じることなく安定して操作できるものであって、全体の厚みを削減した薄型表示装置が実現された。   On the other hand, a lower conductive film 34 made of Ti (titanium) having a thickness of 100 nm was formed on the surface 32a of the second substrate 32 made of soda-lime glass by sputtering. On the exposed surface of the lower conductive film 34, electrode pairs and wiring strips made of silver paste were formed by screen printing, and a plurality of dot spacers 38 made of an ultraviolet curable resin material were formed by a photoresist method. Finally, the upper conductive film 36 and the lower conductive film 34 are fixed to each other by the adhesive layer 40, thereby supporting the component group on the upper conductive film 36 side supported by the first substrate 20 and the second substrate 32. The component group on the lower conductive film 34 side is fixedly connected to each other, whereby the composite display device 10 is manufactured. The completed composite display device 10 can be stably operated without causing delamination, distortion of the EL display panel, detection failure of the touch panel, etc., and a thin display device with a reduced overall thickness has been realized. .

本発明に係る複合型表示装置は、例えばパーソナルコンピュータ、携帯情報端末(PDA)、現金自動預払機(ATM)等の、表示装置を備えたデータ処理装置において使用でき、特に、表示装置自体の薄型化が要求される用途で有効に使用される。また、本発明に係るタッチパネルは、特に暗所での使用が予測されるタッチパネル付き表示装置において有効に使用できる。   The composite display device according to the present invention can be used in a data processing device equipped with a display device such as a personal computer, a personal digital assistant (PDA), an automatic teller machine (ATM), and the display device itself is particularly thin. It is effectively used in applications that require the In addition, the touch panel according to the present invention can be used effectively in a display device with a touch panel that is predicted to be used particularly in a dark place.

本発明の一実施形態による複合型表示装置を模式図的に示す断面図である。It is sectional drawing which shows typically the composite type display apparatus by one Embodiment of this invention. 図1の複合型表示装置を模式図的に示す斜視図である。FIG. 2 is a perspective view schematically showing the composite display device of FIG. 1. 本発明の一実施形態によるタッチパネルを模式図的に示す断面図である。It is sectional drawing which shows typically the touch panel by one Embodiment of this invention. 図3のタッチパネルをブロック図と共に模式図的に示す分解斜視図である。FIG. 4 is an exploded perspective view schematically showing the touch panel of FIG. 3 together with a block diagram. 図3のタッチパネルの変形例を示す図で、(a)一体枠状のEL素子、(b)機能分掌した2個のEL素子、及び(c)帯状のEL素子の、それぞれを装備した状態を示す。FIG. 4 is a diagram showing a modification of the touch panel of FIG. 3, in which (a) an integrated frame-shaped EL element, (b) two EL elements with functional division, and (c) a band-shaped EL element are equipped. Show.

符号の説明Explanation of symbols

10…複合型表示装置
12…観察面
14…背面
16…EL表示部
18…押下入力部
20…第1基板
22…陽極層
24…発光機能層
26…陰極層
28…正孔輸送層
30…発光層
32…第2基板
34…下部導電膜
36…上部導電膜
40、66…接着剤層
44…絶縁皮膜
50…タッチパネル
52、58…絶縁基板
54、60…導電膜
56…第1検出部材
62…第2検出部材
78、781、782…EL素子
80…非検出機能領域
82…検出機能領域
84…導光部材
86…制御回路
DESCRIPTION OF SYMBOLS 10 ... Composite-type display apparatus 12 ... Observation surface 14 ... Back surface 16 ... EL display part 18 ... Press input part 20 ... 1st board | substrate 22 ... Anode layer 24 ... Light emission functional layer 26 ... Cathode layer 28 ... Hole transport layer 30 ... Light emission Layer 32 ... Second substrate 34 ... Lower conductive film 36 ... Upper conductive film 40, 66 ... Adhesive layer 44 ... Insulating film 50 ... Touch panel 52, 58 ... Insulating substrates 54, 60 ... Conductive film 56 ... First detection member 62 ... Second detection members 78, 781, 782 ... EL element 80 ... Non-detection function area 82 ... Detection function area 84 ... Light guide member 86 ... Control circuit

Claims (5)

観察面及び該観察面の反対側の背面を有する平板状のEL表示部と、該EL表示部の該背面に沿って配置される平板状の押下入力部とを備える複合型表示装置において、
前記EL表示部は、前記観察面を有するとともに光透過性及び可撓性を有する第1基板と、該観察面の反対側の該第1基板の裏面に形成される光透過性の陽極層と、該陽極層に積層される発光機能層と、該発光機能層に積層され、前記背面を有する陰極層とを備え、
前記押下入力部は、第2基板と、該第2基板の一表面に形成される下部導電膜と、該下部導電膜に対し導通接触可能に対向かつ離間して配置される上部導電膜とを備え、
前記EL表示部の前記陰極層と前記押下入力部の前記上部導電膜との間に、該陰極層の前記背面に成膜技術により被着形成される絶縁皮膜が介在すること、
を特徴とする複合型表示装置。
In a composite display device comprising a flat EL display unit having an observation surface and a back surface opposite to the observation surface, and a flat press input unit arranged along the back surface of the EL display unit,
The EL display unit includes a first substrate having the observation surface and light transmission and flexibility, and a light transmission anode layer formed on the back surface of the first substrate on the opposite side of the observation surface. A light emitting functional layer laminated on the anode layer, and a cathode layer laminated on the light emitting functional layer and having the back surface,
The pressing input unit includes a second substrate, a lower conductive film formed on one surface of the second substrate, and an upper conductive film disposed opposite to and spaced from the lower conductive film so as to be in conductive contact. Prepared,
Between the cathode layer of the EL display unit and the upper conductive film of the pressing input unit, an insulating film deposited on the back surface of the cathode layer by a film forming technique is interposed,
A composite display device characterized by the above.
前記押下入力部の前記上部導電膜が、前記絶縁皮膜に対し成膜技術により被着形成されている請求項1に記載の複合型表示装置。   The composite display device according to claim 1, wherein the upper conductive film of the pressing input unit is formed on the insulating film by a film formation technique. 透明な絶縁基板及び該絶縁基板の一表面に設けられる透明な導電膜をそれぞれに有する一対の検出部材を備え、それら検出部材を該導電膜同士が導通接触可能に対向かつ離間する相対配置で互いに組み合わせた状態で、表示装置の観察面に搭載して使用されるタッチパネルにおいて、
前記一対の検出部材の外周領域に設置され、表示装置の動作中に発光するシート状のEL素子を具備することを特徴とするタッチパネル。
A pair of detection members each having a transparent insulating substrate and a transparent conductive film provided on one surface of the insulating substrate, the detection members being opposed to each other in a relative arrangement so that the conductive films can be in conductive contact with each other; In the combined state, in the touch panel that is mounted and used on the observation surface of the display device,
A touch panel comprising a sheet-like EL element that is installed in an outer peripheral region of the pair of detection members and emits light during operation of the display device.
前記一対の検出部材からの入力検出信号に応答して前記EL素子を発光させる制御回路をさらに具備する請求項3に記載のタッチパネル。   The touch panel according to claim 3, further comprising a control circuit that causes the EL element to emit light in response to an input detection signal from the pair of detection members. 前記EL素子に隣接して配置され、該EL素子が発する光を、表示装置の観察面に重なるタッチパネルの検出機能領域に導く導光部材をさらに具備する請求項3又は4に記載のタッチパネル。   The touch panel according to claim 3, further comprising a light guide member that is disposed adjacent to the EL element and guides light emitted from the EL element to a detection function region of the touch panel that overlaps an observation surface of the display device.
JP2003418151A 2003-12-16 2003-12-16 Composite display device and touch panel juxtaposed to the display device Pending JP2005182152A (en)

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Publication number Priority date Publication date Assignee Title
WO2008032476A1 (en) * 2006-09-11 2008-03-20 Sharp Kabushiki Kaisha Display device provided with touch panel
US8350817B2 (en) 2006-09-11 2013-01-08 Sharp Kabushiki Kaisha Display device provided with touch panel
JP2009086752A (en) * 2007-09-27 2009-04-23 Seiko Precision Inc Illumination touch panel and manufacturing method of the same
KR101071672B1 (en) * 2009-06-23 2011-10-11 한국표준과학연구원 Brightness controllable electro luminescence device with tactile sensor sensing intensity of force or intensity of pressure, flat panel display having the same, mobile terminal keypad having the same
CN106383610A (en) * 2016-09-21 2017-02-08 京东方科技集团股份有限公司 Pressing feedback apparatus, display apparatus and control method of display apparatus
CN106383610B (en) * 2016-09-21 2019-07-05 京东方科技集团股份有限公司 A kind of pressing feedback device, display device and its control method
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US11910691B2 (en) 2018-12-28 2024-02-20 Yungu (Gu'an) Technology Co., Ltd. Display panel, manufacturing method thereof, and display device

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