JP2011209604A - Display device - Google Patents

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Publication number
JP2011209604A
JP2011209604A JP2010078937A JP2010078937A JP2011209604A JP 2011209604 A JP2011209604 A JP 2011209604A JP 2010078937 A JP2010078937 A JP 2010078937A JP 2010078937 A JP2010078937 A JP 2010078937A JP 2011209604 A JP2011209604 A JP 2011209604A
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Japan
Prior art keywords
front window
display device
plate
printed
region
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Pending
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JP2010078937A
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Japanese (ja)
Inventor
Eiji Ohira
栄治 大平
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Panasonic Liquid Crystal Display Co Ltd
Japan Display Inc
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Panasonic Liquid Crystal Display Co Ltd
Hitachi Displays Ltd
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Application filed by Panasonic Liquid Crystal Display Co Ltd, Hitachi Displays Ltd filed Critical Panasonic Liquid Crystal Display Co Ltd
Priority to JP2010078937A priority Critical patent/JP2011209604A/en
Priority to US13/053,347 priority patent/US20110239510A1/en
Priority to KR1020110027925A priority patent/KR101162017B1/en
Priority to CN2011100816868A priority patent/CN102207646A/en
Publication of JP2011209604A publication Critical patent/JP2011209604A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/13332—Front frames
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Abstract

PROBLEM TO BE SOLVED: To provide a display device where the printed part on a front window is prevented from being shaved and a defect is prevented from being produced.SOLUTION: The display device has a display panel and a front window (FW) provided on the front side of the display panel and includes; a plate member (TP) pasted to the rear surface of the front window which is smaller than the front window; an adhesive film (30) for pasting the front window and the plate member together that is smaller than the plate member; and a printed part (20) printed on the rear surface of the front window and formed around the display region of the display panel, and in the region (23) where the front window makes contact with the edge of the plate member, the printed part is thicker than the other regions.

Description

本発明は表示装置に関し、特に、フロントウィンドウを有する表示装置に関する。   The present invention relates to a display device, and more particularly to a display device having a front window.

携帯電話、携帯情報端末（ＰＤＡ）、デジタルカメラ、マルチメディアプレーヤーなど、多くの携帯型の情報機器の表示装置に液晶モジュール（液晶表示装置）、有機エレクトロルミネッセンス表示装置などの各種表示装置が利用されている。   Various display devices such as liquid crystal modules (liquid crystal display devices) and organic electroluminescence display devices are used as display devices for many portable information devices such as mobile phones, personal digital assistants (PDAs), digital cameras, and multimedia players. ing.

近年では、特許文献１に示すように、これらの表示装置には、表示パネルを保護するため、フロントウィンドウとして透明の保護カバーを貼り付けたハイブリッド構造が一般的となっている。また、図１に示すようなタッチパネル（ＴＰ）を備えた多機能な表示装置も提供され、表示パネルの表面側にタッチパネルやフロントウィンドウを順次貼り合わせる構造が提案されている。   In recent years, as shown in Patent Document 1, a hybrid structure in which a transparent protective cover is pasted as a front window is generally used for these display devices in order to protect the display panel. In addition, a multifunctional display device including a touch panel (TP) as shown in FIG. 1 is also provided, and a structure in which a touch panel and a front window are sequentially attached to the surface side of the display panel is proposed.

図１に示すタッチパネルは、静電容量方式のタッチパネルガラス（タッチパネルスクリーン部）１に配線用のフレキシブル・プリント回路１１が接続され、さらに必要に応じて、タッチパネルの動作を制御する電子部品１２を設け、フレキシブル・プリント回路の他端には、インターフェース端子部１３が形成されている。   In the touch panel shown in FIG. 1, a flexible printed circuit 11 for wiring is connected to a capacitive touch panel glass (touch panel screen portion) 1, and an electronic component 12 for controlling the operation of the touch panel is provided if necessary. An interface terminal portion 13 is formed at the other end of the flexible printed circuit.

他方、フロントウィンドウ（ＦＷ）については、図２に示すように、フロントウィンドウの裏面には、表示パネルの画像表示領域を除き、印刷部分２０が施されている。特に、液晶表示装置では、画像表示領域外からバックライト等の光が漏れないよう、当該印刷部分には黒色系の印刷が施されている。   On the other hand, as for the front window (FW), as shown in FIG. 2, a printed portion 20 is provided on the back surface of the front window except for the image display area of the display panel. In particular, in a liquid crystal display device, black printing is applied to the print portion so that light such as a backlight does not leak from outside the image display area.

図３は、図１のタッチパネル（ＴＰ）を、図２のフロントウィンドウ（ＦＷ）に貼り付けた状態を示す平面図であり、図４は、図３の一点鎖線Ｘ−Ｘ’における断面図を示している。符号３０は、フロントウィンドウとタッチパネルを張り付ける粘着膜を示している。   3 is a plan view showing a state in which the touch panel (TP) of FIG. 1 is attached to the front window (FW) of FIG. 2, and FIG. 4 is a cross-sectional view taken along one-dot chain line XX ′ of FIG. Show. Reference numeral 30 denotes an adhesive film for attaching the front window and the touch panel.

通常、タッチパネル（ＴＰ）などフロントウィンドウ（ＦＷ）に貼り付ける部材は、フロントウィンドウの寸法より小さく、粘着膜３０は、タッチパネルなどよりもさらに寸法が小さくなっている。このため、図５に示すように、フロントウィンドウのエッジに押圧力が加わると、フロントウィンドウ（ＦＷ）が撓み、タッチパネル（ＴＰ）などのエッジと符号Ａの部分で接触し、印刷部分２０の一部が削れ、印刷部分の不良品となる。   Usually, a member attached to the front window (FW) such as the touch panel (TP) is smaller than the size of the front window, and the size of the adhesive film 30 is further smaller than that of the touch panel or the like. For this reason, as shown in FIG. 5, when a pressing force is applied to the edge of the front window, the front window (FW) bends and comes into contact with the edge of the touch panel (TP) or the like at the portion denoted by A, and The part is scraped off, resulting in a defective printed part.

図４の印刷部分２０とタッチパネル（ＴＰ）との間に緩衝材を配置することも考えられるが、両者のギャップ量は、０．１ｍｍ以下と非常に狭いため、緩衝材を配置することは困難である。   Although it is conceivable to arrange a cushioning material between the printing part 20 and the touch panel (TP) in FIG. 4, it is difficult to arrange the cushioning material because the gap amount between them is as narrow as 0.1 mm or less. It is.

特願２００９−０８５４７３号（出願日：２００９年３月３１日）Japanese Patent Application No. 2009-085473 (Filing date: March 31, 2009)

本発明の解決しようとする課題は、上述した問題を解消し、フロントウィンドウの印刷部分の削れを抑制し、不良品の発生を抑制した表示装置を提供することである。   The problem to be solved by the present invention is to provide a display device that solves the above-described problems, suppresses the printed portion of the front window from being scraped, and suppresses the generation of defective products.

本発明者は、鋭意研究を重ねた結果、図６に示すように、フロントウィンドウの印刷部分２１を厚くし、タッチパネルなどのエッジが接触して印刷部分が全部削れるのを防止する方法を提案した。しかしながら、印刷部分を１０μｍより厚くすると、印刷部分２１と粘着膜３０との重なった部分の近傍（符号ＢやＣ）に気泡（粘着膜の欠損）が発生し易すくなり、新たな不良品問題を生ずることが判明した。   As a result of extensive research, the present inventor has proposed a method of increasing the thickness of the printed portion 21 of the front window and preventing the printed portion from being scraped by contact with an edge of a touch panel or the like, as shown in FIG. . However, if the printed part is thicker than 10 μm, bubbles (adhesive film defects) are more likely to occur in the vicinity (signs B and C) where the printed part 21 and the adhesive film 30 overlap, resulting in a new defective product problem. It has been found that

また、図７に示すように、厚くした印刷部分２１の内側に、厚みが１０μｍ以下の薄い印刷領域２２を形成し、当該印刷領域２２に重なるように粘着膜３０を設けることも提案した。しかしながら、粘着膜３０からタッチパネル（ＴＰ）のエッジまでの距離Ｓが長くなるため、フロントウィンドウとタッチパネル（ＴＰ）が剥がれ易くなるという問題が、新たに生じることが判明した。   In addition, as shown in FIG. 7, it has also been proposed that a thin print region 22 having a thickness of 10 μm or less is formed inside the thick print portion 21, and an adhesive film 30 is provided so as to overlap the print region 22. However, since the distance S from the adhesive film 30 to the edge of the touch panel (TP) is increased, it has been found that a new problem arises that the front window and the touch panel (TP) are easily peeled off.

本発明者らは、さらに工夫を重ね、以下に示すような特徴を有する表示装置を発明し、上述した課題の解決を図った。
（１） 表示パネルと該表示パネルの表側に配置されたフロントウィンドウとを有する表示装置において、該フロントウィンドウの裏面に貼り付けられる、該フロントウィンドウより寸法の小さい板状部材と、該フロントウィンドウと該板状部材とを貼り付ける、該板状部材より寸法の小さい粘着膜と、該フロントウィンドウの裏面に印刷され、該表示パネルの表示領域の周囲に形成された印刷部分と、該フロントウィンドウと該板状部材のエッジ部分が接触する領域には、該印刷部分の厚みをその他の領域よりも厚くしたことを特徴とする。 The inventors have further devised, invented a display device having the following characteristics, and attempted to solve the problems described above.
(1) In a display device having a display panel and a front window arranged on the front side of the display panel, a plate-like member having a size smaller than that of the front window, attached to the back surface of the front window, and the front window An adhesive film having a size smaller than that of the plate-like member, a printed portion printed on the back surface of the front window and formed around the display area of the display panel, and the front window; In the region where the edge portion of the plate-like member contacts, the thickness of the printed portion is made thicker than other regions.

（２） 上記（１）に記載の表示装置において、該印刷部分を厚くする領域は、該板状部材のコーナー・エッジに対応する領域であることを特徴とする。 (2) In the display device according to (1), the region where the printed portion is thickened is a region corresponding to a corner / edge of the plate-like member.

（３） 上記（１）又は（２）に記載の表示装置において、該印刷部分を厚くする領域は、該板状部材のエッジ部分が配置される位置を中心に、０．５ｍｍ以上の幅を有することを特徴とする。 (3) In the display device according to the above (1) or (2), the region where the printed portion is thick has a width of 0.5 mm or more around the position where the edge portion of the plate-like member is arranged. It is characterized by having.

（４） 上記（１）乃至（３）のいずれかに記載の表示装置において、該印刷部分を厚くする領域は、印刷を２回以上、重ね塗りされていることを特徴とする。 (4) In the display device according to any one of (1) to (3), a region where the printed portion is thickened is overprinted twice or more.

（５） 上記（１）乃至（４）のいずれかに記載の表示装置において、該板状部材は、タッチパネルスクリーン部又は表示パネルのいずれかであることを特徴とする。 (5) In the display device according to any one of (1) to (4), the plate-like member is either a touch panel screen unit or a display panel.

本発明のように、フロントウィンドウと板状部材のエッジ部分が接触する領域には、フロントウィンドウに印刷した印刷部分の厚みをその他の領域よりも厚くするため、タッチパネルなどの板状部材のエッジが印刷部分に接触しても、印刷部分全部が削れることが無く、不良品の発生が抑制できる。   As in the present invention, in the region where the front window and the edge portion of the plate-like member are in contact with each other, the edge of the plate-like member such as a touch panel is formed in order to make the printed portion printed on the front window thicker than other regions. Even if it contacts the printed part, the entire printed part is not scraped, and the occurrence of defective products can be suppressed.

しかも、粘着膜の形成される部分の印刷部分の厚みは、従来通り薄く形成されているため、フロントウィンドウと粘着膜との間や板状部材と粘着膜との間に気泡が発生することがない。さらに、粘着膜から板状部材のエッジ部分までの距離も短くでき、フロントウィンドウと板状部材との剥がれも防止することが可能となる。   Moreover, since the thickness of the printed part of the part where the adhesive film is formed is thin as before, bubbles may be generated between the front window and the adhesive film or between the plate-like member and the adhesive film. Absent. Furthermore, the distance from the adhesive film to the edge portion of the plate-like member can be shortened, and peeling between the front window and the plate-like member can be prevented.

タッチパネルの平面図である。It is a top view of a touch panel. フロントウィンドウの平面図である。It is a top view of a front window. フロントウィンドウとタッチパネルとを貼り合わせた場合の様子を示す平面図である。It is a top view which shows the mode at the time of bonding a front window and a touch panel. 図３の一点鎖線Ｘ−Ｘ’における断面図である。FIG. 4 is a cross-sectional view taken along one-dot chain line X-X ′ in FIG. 3. 図４のフロントウィンドウを撓ませた場合の状態を説明する図である。It is a figure explaining the state at the time of bending the front window of FIG. 印刷部分の厚みを増加させた場合の状態を説明する図である。It is a figure explaining the state at the time of increasing the thickness of a printing part. 厚手の印刷部分の内側に薄い印刷部分を設けた場合の状態を説明する図である。It is a figure explaining the state at the time of providing a thin printing part inside a thick printing part. 本発明の表示装置を示す平面図である。It is a top view which shows the display apparatus of this invention. 図８の一点鎖線Ｘ−Ｘ’における断面図である。It is sectional drawing in the dashed-dotted line X-X 'of FIG.

本発明に係る表示装置について、以下に詳細に説明する。図８は、本発明の表示装置を示す平面図であり、図９は、図８における一点鎖線Ｘ−Ｘ’における断面図を示す図である。
本発明の表示装置の特徴は、表示パネル（不図示）と該表示パネルの表側に配置されたフロントウィンドウ（ＦＷ）とを有する表示装置において、該フロントウィンドウの裏面に貼り付けられる、該フロントウィンドウより寸法の小さい板状部材（ＴＰ）と、該フロントウィンドウと該板状部材とを貼り付ける、該板状部材より寸法の小さい粘着膜（３０）と、該フロントウィンドウの裏面に印刷され、該表示パネルの表示領域の周囲に形成された印刷部分（２０）と、該フロントウィンドウと該板状部材のエッジ部分が接触する領域（符号２３の形成領域）には、該印刷部分の厚みをその他の領域よりも厚くしたことを特徴とする。 The display device according to the present invention will be described in detail below. FIG. 8 is a plan view showing the display device of the present invention, and FIG. 9 is a cross-sectional view taken along the alternate long and short dash line XX ′ in FIG.
The display device of the present invention is characterized in that the front window is attached to the back surface of the front window in a display device having a display panel (not shown) and a front window (FW) disposed on the front side of the display panel. A plate-like member (TP) having a smaller size, the front window and the plate-like member are attached, an adhesive film (30) having a smaller size than the plate-like member, and printed on the back surface of the front window, In the printed part (20) formed around the display area of the display panel and the area where the front window and the edge part of the plate-shaped member are in contact (formation area of reference numeral 23), the thickness of the printed part is It is characterized by being thicker than the region.

フロントウィンドウとしては、アクリル系材料など樹脂系材料が好適に利用可能である。また、強化ガラスに飛散防止フィルムを張り付けたものを利用することも可能である。   As the front window, a resin material such as an acrylic material can be suitably used. It is also possible to use a tempered glass with a scattering prevention film attached thereto.

フロントウィンドウに貼り付ける板状部材としては、特許文献１に示したようなタッチパネルがある。この場合、フロントウィンドウ（ＦＷ）に粘着膜で貼り付けられる部分は、タッチパネルスクリーン部となる。また、タッチパネル以外にも、表示パネル自体をフロントウィンドウに貼り付けることも可能である。表示パネルに液晶表示パネルや有機エレクトロルミネッセンス表示パネルを利用する場合には、これらの表示パネルに設けられる偏光板が、粘着膜によってフロントウィンドウに貼り付けられる。   As a plate-like member to be attached to the front window, there is a touch panel as shown in Patent Document 1. In this case, the part pasted on the front window (FW) with the adhesive film is a touch panel screen part. In addition to the touch panel, the display panel itself can be attached to the front window. When a liquid crystal display panel or an organic electroluminescence display panel is used as the display panel, a polarizing plate provided on these display panels is attached to the front window with an adhesive film.

印刷部分を厚くする領域は、図８に示すように、板状部材（タッチパネルＴＰ）のコーナー・エッジに対応する領域であることが好ましい。これは、フロントウィンドウ（ＦＷ）のコーナー部分が他の部分よりより撓み易く、また、板状部材のコーナー部分（コーナー・エッジ）により、容易に印刷部分が削れ易いためである。   As shown in FIG. 8, it is preferable that the area where the printed portion is thick be an area corresponding to the corner / edge of the plate-like member (touch panel TP). This is because the corner portion of the front window (FW) is more easily bent than the other portions, and the printed portion is easily scraped by the corner portion (corner edge) of the plate-like member.

印刷部分を厚くする領域（符号２３）は、板状部材のエッジ部分が配置される位置（Ｅ）を中心に、０．５ｍｍ以上の幅（ｄ）を有することが好ましい。一般に、タッチパネル（ＴＰ）などの板状部材とフロントウィンドウとの組立精度を０．２ｍｍ以下に設定されている。このため、仮に、この範囲で板状部材がフロントウィンドウに対してズレても、常に、板状部材のエッジ部分が厚手の印刷領域に入っているよう構成することができる。   The region (reference numeral 23) for thickening the printed portion preferably has a width (d) of 0.5 mm or more around the position (E) where the edge portion of the plate-like member is arranged. Generally, the assembly accuracy between a plate-like member such as a touch panel (TP) and a front window is set to 0.2 mm or less. For this reason, even if the plate-like member is displaced from the front window in this range, the edge portion of the plate-like member can always be in the thick print region.

印刷部分を厚くする領域の形成方法としては、印刷を２回以上、重ね塗りすることが好ましい。これにより、容易に厚手印刷部分を形成することが可能となる。なお、厚手印刷部分以外の領域の厚みは、１０μｍ以下の設定し、粘着膜が気泡を発生させないよう設定されている。   As a method for forming a region where the printed portion is thickened, it is preferable to perform overprinting twice or more. Thereby, it is possible to easily form the thick print portion. Note that the thickness of the region other than the thick print portion is set to 10 μm or less, and the adhesive film is set so as not to generate bubbles.

以上のように、本発明によれば、フロントウィンドウの印刷部分の削れを抑制し、不良品の発生を抑制した表示装置を提供することが可能となる。   As described above, according to the present invention, it is possible to provide a display device that suppresses scraping of the printed portion of the front window and suppresses the generation of defective products.

２０〜２３ 印刷部分
３０ 粘着膜
ＦＷ フロントウィンドウ
ＴＰ タッチパネル 20-23 Printing part 30 Adhesive film FW Front window TP Touch panel

Claims (5)

表示パネルと該表示パネルの表側に配置されたフロントウィンドウとを有する表示装置において、
該フロントウィンドウの裏面に貼り付けられる、該フロントウィンドウより寸法の小さい板状部材と、
該フロントウィンドウと該板状部材とを貼り付ける、該板状部材より寸法の小さい粘着膜と、
該フロントウィンドウの裏面に印刷され、該表示パネルの表示領域の周囲に形成された印刷部分と、
該フロントウィンドウと該板状部材のエッジ部分が接触する領域には、該印刷部分の厚みをその他の領域よりも厚くしたことを特徴とする表示装置。 In a display device having a display panel and a front window arranged on the front side of the display panel,
A plate-like member having a size smaller than that of the front window, which is attached to the back surface of the front window;
Adhering the front window and the plate member, an adhesive film having a smaller dimension than the plate member,
Printed on the back side of the front window and formed around the display area of the display panel;
A display device characterized in that in the region where the front window and the edge portion of the plate-shaped member are in contact with each other, the thickness of the printed portion is made thicker than other regions. 請求項１に記載の表示装置において、該印刷部分を厚くする領域は、該板状部材のコーナー・エッジに対応する領域であることを特徴とする表示装置。   The display device according to claim 1, wherein the thickened region of the printed portion is a region corresponding to a corner edge of the plate-like member. 請求項１又は２に記載の表示装置において、該印刷部分を厚くする領域は、該板状部材のエッジ部分が配置される位置を中心に、０．５ｍｍ以上の幅を有することを特徴とする表示装置。   3. The display device according to claim 1, wherein a region where the printed portion is thick has a width of 0.5 mm or more around a position where an edge portion of the plate-like member is disposed. Display device. 請求項１乃至３のいずれかに記載の表示装置において、該印刷部分を厚くする領域は、印刷を２回以上、重ね塗りされていることを特徴とする表示装置。   4. The display device according to claim 1, wherein the region where the printed portion is thick is overprinted twice or more times. 5. 請求項１乃至４のいずれかに記載の表示装置において、該板状部材は、タッチパネルスクリーン部又は表示パネルのいずれかであることを特徴とする表示装置。   5. The display device according to claim 1, wherein the plate-like member is one of a touch panel screen unit and a display panel.
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