TWI248535B - Display device - Google Patents

Display device Download PDF

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Publication number
TWI248535B
TWI248535B TW092126481A TW92126481A TWI248535B TW I248535 B TWI248535 B TW I248535B TW 092126481 A TW092126481 A TW 092126481A TW 92126481 A TW92126481 A TW 92126481A TW I248535 B TWI248535 B TW I248535B
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TW
Taiwan
Prior art keywords
substrate
display device
flat
display panel
reinforcing plate
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TW092126481A
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Chinese (zh)
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TW200413774A (en
Inventor
Noriko Watanabe
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Sharp Kk
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Publication of TWI248535B publication Critical patent/TWI248535B/en

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F15/00Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like
    • G09F15/0006Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels
    • G09F15/0012Boards, hoardings, pillars, or like structures for notices, placards, posters, or the like planar structures comprising one or more panels frames therefor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)

Abstract

A display panel 1 and a frame 2, provided on the periphery of the display panel, are included. The frame 2 includes a supporting member 2 for supporting the display panel 1 on the periphery thereof (i.e., on the principal surface of the substrate of the display panel 1). The supporting member 2 includes a fiat portion 2a and a first curved portion 2b, which are provided so as to face the principal surface of the substrate 1. The first curved portion 2b is continuous with the flat portion 2a. The principal surface of the substrate 1 is fixed onto the flat portion 2a either directly or indirectly. While no external force is being applied to the display panel 1, a gap is created between the principal surface of the substrate 1 and the curved portion 2b.

Description

1248535 玖、發明說明: 【發明所屬之技術領域】 本發明係有關一種顯示裝置’尤其是有關一種顯示面板 的安裝構造。 【先前技術】 近年來,使用各種形式的平面顯示器作為取代CRT的顯示 裝置。即使在扁平型面板顯示器中,》晶顯示裝置係活用 薄型、輕量、低消耗能力的特徵,廣泛作為行動電話或pda 等移動用途的顯示裝置顯示器使用。 特別是在移動用途時,期望顯示裝置可更薄型化、輕量 化而進行佔顯示裝置的厚度與重量大半的破璃基板之^板 化。然而,由於玻璃基板過薄時極易裂開,因此研討使用 塑勝基板取代玻璃基板。 由於塑膠基板即使過薄亦不易裂開,因此可實現薄片顧 示器(或薄膜顯示器)、或穿戴式顯示器等柔性顯示裝置。、 -般來說’塑膠材料與玻璃基板相比彈性原本就高(斷裂 I伸!·生大)且不易裂開。然而,在作為液晶顯示裝置使用 時’無法單獨使用塑膠,,為液晶顯示裝置時,如係 單純矩陣型,雖僅形成-層的無機膜作為像素電極則益問 題,但若為主動矩陣型時,心需在各樣的溫度下沉積複 數個無機膜,又須以較佳精確度圖案化上述無機膜,因此 必須縮小基板的熱膨脹率。 藉由在塑膠基板複合化破璃的填料或纖維,開發一種可 確保透明性且使熱膨脹率下降之基板(以下稱為「複合型塑 膠基板」)。&於複合型塑I基板具有玻璃肖塑膠的中間物 88035 1248535 性,因此在局部產生強的應力之狀況下,亦會產生破損。 例如,以堅硬物體之角強力敲擊基板面時。然而,若除去 這種嚴格的條件,複合型塑膠基板對於外力或衝擊係具有 高的耐性,可確認在一般使用顯示裝置的條件下產生的外 力或衝擊不會導致破損。 然而,嘗試使用複合型塑膠基板的液晶顯示裝置作為移 動顯示器時,基板單體亦有未遭受外力或衝擊而產生破捐 之情況。又’作為柔性顯示器使用時,推測係施加大於習 知的使用條件之外力。 因此’在檢討組裝複合型塑膠基板作為液晶顯示裝置導 致破損的原因時,已知液晶面板的安裝構造對於複合型塑 膠基板之裂開容易度有很大的影響。 周知安裝構造對於玻璃基板裂開容易度的影響,習知提 案有一種用以防止破損的安裝構造。 例如,日本實開昭61_124016號公報提案有一種在液晶面 板的單側全面以黏著劑或兩面膠帶黏合具有液晶面板的總 尽度0·4倍以上厚度的樹脂製補強板。在該構造中,由於在 包含液晶面板的顯示區域全面設置補強板,因此使光的利 用效率降低,較不理想。又,當補強板的剛性過高時,將 損及液晶面板的柔性,當補強板的剛性過低時,將降低抑 制破損的效果。 在使用具備有與液晶面板的顯示區域對應的開口部之框 架支持液晶面板的構成中,日本特開平5_165〇13號公報係揭 不有介以彈性體材料構成的黏著層將液晶面板固定在外裝 88035 1248535 殼體之構成。又,日本特開平1H53781號公報中,揭示一 種將液晶面板的外周部端面插入固定在由軟性材料構成的 Y竽形狀之固定框,將該固定框固定在框架之構成。 【發明内容】 然而,檢討本發明的結果,係在日本特開平5_165〇13號公 報及特開平11-153781號公報所記載的構成中,已知無法有 效抑制破璃基板的破損與複合型塑膠基板的破損。 具體而言,在進行種種檢討後的結果,已知在使用複合 型塑膠基板的液晶面板中,大部分的情況是在觀察者側之 面或與觀察者相反側之面的周緣部上直接將液晶面板固定 在框架的構成,使液晶面板與框架直接相接的部分(稱為支 持部)裂開。此一情況係根據以下的理由。 玻璃基板與塑膠基板相比,由於破裂畸變小,因此使是 比較小的外力或衝擊也會裂開,而藉由彈性體緩和外力或 衝擊,以降低玻璃基板產生的畸變,可有效防止玻璃基板 破損相對於此,就破裂畸變較大的複合型塑膠基板而言, 難以藉由彈性體吸收足以導致複合型塑膠基板破損的外力 或衝擊。 參照圖5(a)至(c),說明將使用複合型塑膠基板的液晶顯 示面板1固定在具有彈性的框架12之構成產生破損之結 構。此外,具有彈性的框架12係模式顯示包含如特開平 5-165〇13號公報所記載之彈性材料構成的黏著層之框架,不 需要為一體。 如圖5(a)所示,在未施加外力的狀態下,使用複合型塑膠 88035 1248535 基板的液晶顯示面板丨固定在具有彈性的框架12。 如圖5(b)之箭頭所示,對液晶面板丨施加外力時,液晶面 板1變形。由於複合型塑膠基板的破裂畸變較大,因此即使 k形的情況比玻璃基板嚴重亦不致產生破損。活用該特 徵,可實現柔性顯示器。 此時,在液晶面板1變形之同時,彈性框架12亦變形,彈 性框架12的角部之功用在於抑制應力集中在液晶面板ι。 然而,如圖5(c)所示,當液晶面板丨的變形量變大時,彈 f生C未12的’文形供法趕上,液晶面板丨應力集中於在彈性框 架12的角部上而產生破損。 此外,該破損產生的頻率係不依存於液晶面板丨是否與框 架12的支持部黏著。 如此,上述特開平5_165〇13號公報及特開平u_15378i號公 報所揭π的彈性材料(軟性材料)介存在液晶面板與框架之 間的構成,對於抑制產生較大變形之液晶面板的破損之效 果不顯著。 —另外,特開2000_200506號公報揭示有:使液晶面板的觀 祭者侧與相反側(r設為下側」)之面所設置的複數片光學 板、導光板、及複數片光學板與液晶面板一體組裝於框架 之構成,係將與最下侧的板相接的框架之部分的内側去角 成圓弧狀之構成。該構成係用以保護導光板的透鏡溝面不 造成損傷,抑制液晶面板的破損之構成則未揭示。 雖以液晶顯示裝置為例說明習知技術的問題點,惟上述 問4並不限足於液晶顯示裝置,係為其他顯示裝置特別是 88035 1248535 具備柔性基板所使用的顯示面板(例如有機EL顯示面板或 電性泳動型顯示面板)之顯示裝置中共同的問題。 本發明係有鑑於上述各問題點而研創者,主要目的在於 提供一種對顯示面板施加外力時,顯示面板不易破損之顯 不裝置。 本發明之顯示裝置,其特徵在於,具備有框架,該框架 係具有基板的顯示面板、及在上述顯示面板的周緣部上以 上述基板的主面支持上述顯示面板的支持部之框架,上述 基板的支持部係在與上述基板的上述主面相對向側具有平 坦部、與上述平坦部連續設置的第丨彎曲部,上述基板的上 述主面係直接或間接地固定在上述平坦部,在未對上述基 ,施加外力的狀態下,在上述基板的上述主面與上述第^ 彎曲部之間形成有空隙,並藉此達成上述目的。 、在某最佳實施形態中,上述支持部係具有與上述第丨彎曲 邵相對向的第2彎曲部。 在某最佳實施形態中 層固定在上述平坦部 在某最佳實施形態中’在上述基板的上述主面與上述 持邯的上述平坦部之間更具有補強板。 上實施形態中’上述補強板係介以黏著層固定 上述支持部以由彈性體所形成較為理想。 =基:為塑膠基板,可使本發明之: 【貫施万式】 88035 1248535 性,因應補強板4的材料之楊格 ^汉疋/予度。在移動用i佘 中,考慮顯示裝置的厚度或輕户陆 … 反4 I度時,補強板4的最佳厚度例 如為 0.1 mm至 0.5 mm。 當採用這種構成時,如圖6所示,與使用具有角的支持部 22之構成相異,在補強板4變形時,防止應力集中在補強板 4與支持部2接觸之部分,可抑制補強板4的破損。 當補強板4破損時,在該破損部上應力集中在顯示㈣ 卜將使顯示面板(基板)β生破損。當補強板4較柔軟時, 雖不會引起破損,但卻缺乏補強基板丨的效果。反之,當補 強板的剛性高時無法構成柔性顯示器。如此,#採用圖6 所示的構成時,亦難以選擇適當的補強板4之材質(剛性的 程度)與厚度。 相對於此,如圖4所示,在支持部4的端部設置彎曲部2b 時,由於應力未集中在補強板4,因此補強板4的選擇肢亦 廣,可充分獲得補強板之功效。 在圖4中’雖使用黏著層3將顯示面板1固定在補強板4, 惟不設置黏著層3而使用其他構成亦可。又,即使將補強板 4固足在支持邵2之構成亦相同,亦可使用黏著層,亦可使 用其他構成。其他構成可為上述例示之螺絲。 又’在圖4所示的構成中,顯示面板1的端部雖具有與支 持邵2的平坦部2a重疊的關係,惟即使位於不重疊的位置, 若補強板4固定在支持部2的平坦部2a,則亦可獲得相同的 功效。 此外,本發明係一種顯示裝置,其特徵在於具備有變形 88035 -15- 1248535 2b 第1彎曲部 2c 第2彎曲部 3 黏著層 17 88035BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly to a mounting structure of a display panel. [Prior Art] In recent years, various forms of flat panel displays have been used as display devices in place of CRTs. Even in flat panel displays, the crystal display device is widely used as a display device display for mobile use such as mobile phones or pdas because of its characteristics of thinness, light weight, and low power consumption. In particular, in the case of mobile use, it is desirable that the display device can be made thinner and lighter, and the glass substrate which occupies most of the thickness and weight of the display device can be formed. However, since the glass substrate is extremely easy to crack when it is too thin, it has been studied to use a plastic substrate instead of a glass substrate. Since the plastic substrate is not easily cracked even if it is too thin, a flexible display device such as a sheet sensor (or a film display) or a wearable display can be realized. - Generally speaking, the plastic material is originally higher in elasticity than the glass substrate (fracture I stretched!) and is not easily cracked. However, when it is used as a liquid crystal display device, it is not possible to use plastic alone. In the case of a liquid crystal display device, if it is a simple matrix type, it is advantageous to form only a layer of inorganic film as a pixel electrode, but in the case of an active matrix type, The core needs to deposit a plurality of inorganic films at various temperatures, and the inorganic film must be patterned with better precision. Therefore, it is necessary to reduce the thermal expansion rate of the substrate. A substrate (hereinafter referred to as a "composite type plastic substrate") which can ensure transparency and lower the coefficient of thermal expansion by developing a filler or a fiber which is laminated on a plastic substrate. & The composite plastic I substrate has the intermediate of the glass plastic, 88035 1248535, so that it will be damaged in the case of strong local stress. For example, when the substrate surface is strongly struck at the corner of a hard object. However, if such a strict condition is removed, the composite plastic substrate has high resistance to an external force or an impact system, and it is confirmed that an external force or an impact generated under the condition that the display device is generally used does not cause breakage. However, when a liquid crystal display device using a composite plastic substrate is used as a mobile display device, the substrate alone may be damaged by external force or impact. Further, when used as a flexible display, it is presumed that a force other than the conventional use conditions is applied. Therefore, when reviewing the assembly of a composite plastic substrate as a cause of damage of the liquid crystal display device, it is known that the mounting structure of the liquid crystal panel greatly affects the ease of cracking of the composite plastic substrate. It is known that the mounting structure has an influence on the ease of cracking of the glass substrate, and the conventional proposal has a mounting structure for preventing breakage. For example, Japanese Laid-Open Patent Publication No. SHO 61-124016 proposes a resin-made reinforcing plate having a thickness of 0.4 times or more of the total thickness of the liquid crystal panel adhered to one side of the liquid crystal panel by an adhesive or a double-sided tape. In this configuration, since the reinforcing plate is provided in the entire display area including the liquid crystal panel, the utilization efficiency of light is lowered, which is not preferable. Further, when the rigidity of the reinforcing plate is too high, the flexibility of the liquid crystal panel is impaired, and when the rigidity of the reinforcing plate is too low, the effect of suppressing the damage is reduced. In the configuration in which the liquid crystal panel is supported by a frame having an opening portion corresponding to the display region of the liquid crystal panel, Japanese Laid-Open Patent Publication No. Hei No. Hei 5_165 No. 13 discloses that the liquid crystal panel is fixed to the exterior with an adhesive layer made of an elastomer material. 88035 1248535 Composition of the housing. Japanese Laid-Open Patent Publication No. Hei. No. HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH However, it is known that the damage of the glass substrate and the composite plastic cannot be effectively suppressed in the configuration described in Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei 11-153781. Damage to the substrate. Specifically, as a result of various reviews, it is known that in a liquid crystal panel using a composite plastic substrate, most of the cases are directly on the surface of the observer or the peripheral portion of the surface opposite to the observer. The liquid crystal panel is fixed to the frame so that the portion where the liquid crystal panel directly contacts the frame (referred to as a support portion) is split. This situation is based on the following reasons. Compared with the plastic substrate, the glass substrate has a small cracking distortion, so that a relatively small external force or impact is cracked, and the elastic body relaxes the external force or impact to reduce the distortion generated by the glass substrate, thereby effectively preventing the glass substrate. In contrast, in the case of a composite plastic substrate having a large crack distortion, it is difficult to absorb an external force or impact sufficient to cause breakage of the composite plastic substrate by the elastic body. Referring to Fig. 5 (a) to (c), the structure in which the liquid crystal display panel 1 using the composite plastic substrate is fixed to the frame 12 having elasticity will be described. Further, the frame 12 having a flexible structure exhibits a frame including an adhesive layer made of an elastic material as described in Japanese Laid-Open Patent Publication No. Hei 5-165- No. 13, and is not necessarily integrated. As shown in Fig. 5 (a), the liquid crystal display panel 使用 of the composite plastic 88035 1248535 substrate is fixed to the frame 12 having elasticity without applying an external force. As shown by the arrow in Fig. 5(b), when an external force is applied to the liquid crystal panel, the liquid crystal panel 1 is deformed. Since the crack of the composite plastic substrate is large, even if the k-shape is severe, the glass substrate is not damaged. By utilizing this feature, a flexible display can be realized. At this time, the elastic frame 12 is also deformed while the liquid crystal panel 1 is being deformed, and the corner portion of the elastic frame 12 functions to suppress stress from being concentrated on the liquid crystal panel ι. However, as shown in FIG. 5(c), when the amount of deformation of the liquid crystal panel turns large, the 'texture supply of the spring C is not 12, and the stress of the liquid crystal panel is concentrated on the corner of the elastic frame 12. And it is damaged. Further, the frequency of the breakage does not depend on whether or not the liquid crystal panel is adhered to the support portion of the frame 12. In the above, the elastic material (soft material) of π disclosed in Japanese Laid-Open Patent Publication No. Hei. No. Hei. Not significant. In addition, Japanese Laid-Open Patent Publication No. 2000-200506 discloses a plurality of optical sheets, a light guide plate, and a plurality of optical plates and liquid crystals provided on the side of the viewer side and the opposite side (r is set to the lower side) of the liquid crystal panel. The panel is integrally assembled to the frame, and the inner side of the portion of the frame that is in contact with the lowermost plate is formed into an arc shape. This configuration is not disclosed for protecting the lens groove surface of the light guide plate from damage and suppressing damage of the liquid crystal panel. Although the liquid crystal display device is taken as an example to explain the problems of the prior art, the above-mentioned question 4 is not limited to the liquid crystal display device, and is a display panel (for example, an organic EL display) which is provided with a flexible substrate, such as other display devices, particularly 88035 1248535. Common problems in display devices of panels or electrophoretic display panels. The present invention has been made in view of the above problems, and a main object of the present invention is to provide a display device which is less likely to be damaged when an external force is applied to a display panel. A display device according to the present invention includes a frame, a frame having a substrate, and a frame supporting a support portion of the display panel on a peripheral portion of the display panel at a peripheral portion of the display panel, the substrate The support portion has a flat portion and a second curved portion that is continuous with the flat portion on a side opposite to the main surface of the substrate, and the main surface of the substrate is directly or indirectly fixed to the flat portion. In the state in which an external force is applied to the base, a gap is formed between the main surface of the substrate and the first curved portion, thereby achieving the above object. In a preferred embodiment, the support portion has a second bending portion that faces the first bending curve. In a preferred embodiment, the layer is fixed to the flat portion. In a preferred embodiment, a reinforcing plate is further provided between the main surface of the substrate and the flat portion of the crucible. In the above embodiment, it is preferable that the reinforcing plate is fixed to the support portion by an adhesive layer to be formed of an elastic body. = base: for the plastic substrate, the invention can be: [Cheng Shiwan] 88035 1248535, according to the material of the reinforcing plate 4, Yang Ge / Han Yu / degree. In the case of the movement, the optimum thickness of the reinforcing plate 4 is, for example, 0.1 mm to 0.5 mm in consideration of the thickness of the display device or the lightness of the home. When such a configuration is employed, as shown in FIG. 6, unlike the configuration in which the support portion 22 having the corners is used, when the reinforcing plate 4 is deformed, stress concentration is prevented from being concentrated on the portion where the reinforcing plate 4 is in contact with the support portion 2, and suppression can be suppressed. Damage of the reinforcing plate 4. When the reinforcing plate 4 is broken, stress on the damaged portion is concentrated on the display (4), and the display panel (substrate) β is broken. When the reinforcing plate 4 is relatively soft, it does not cause breakage, but it lacks the effect of reinforcing the substrate. Conversely, a flexible display cannot be constructed when the rigidity of the reinforcing plate is high. Thus, when # is configured as shown in Fig. 6, it is also difficult to select the material (degree of rigidity) and thickness of the appropriate reinforcing plate 4. On the other hand, as shown in Fig. 4, when the bending portion 2b is provided at the end portion of the support portion 4, since the stress is not concentrated on the reinforcing plate 4, the selection of the reinforcing plate 4 is also wide, and the effect of the reinforcing plate can be sufficiently obtained. In Fig. 4, the display panel 1 is fixed to the reinforcing plate 4 by using the adhesive layer 3, but the adhesive layer 3 may not be provided and another configuration may be used. Further, even if the reinforcing plate 4 is fixed in the same manner as the support of the Shao 2, an adhesive layer can be used, and other configurations can be used. Other configurations may be the screws exemplified above. Further, in the configuration shown in FIG. 4, the end portion of the display panel 1 has a relationship of overlapping with the flat portion 2a supporting the support 2, but the reinforcing plate 4 is fixed to the flat portion of the support portion 2 even at a position where it does not overlap. Part 2a can also achieve the same effect. Further, the present invention is a display device characterized by having a deformation 88035 -15 - 1248535 2b first bending portion 2c second bending portion 3 adhesive layer 17 88035

Claims (1)

似兔12M81號袁刹申請案 年月中文換本(94年9月) 拾、申請專利範園: 1. 一種顯示裝置,其特徵在於: 具備顯示面板,其具有基板;及框架,其在上述顯示 面板的周緣部具有以上述基板的主面支持上述顯示面板 的支持部; 上述支持部在與上述基板的上述主面相對向側具有平 坦邵及接著上述平坦部設置的第1彎曲部; 上述基板的上述主面直接或間接地固定在上述平坦 邵,在外力一未施加於上述基板的狀態下,於上述基板的 上述主面與上述第丨彎曲部之間形成有空隙。 2·如申請專利範圍第1項之顯示裝置,其中上述支持部具有 與上述第1彎曲部相對向的第2彎曲部。 3·如中請專利範圍第丨或2項之顯示裝置,其中上述基板的 上述主面經由黏著層固定在上述平坦部。 4.如申請專利範圍第丨或2項之顯示裝置,其中在上述基板 的上述王面與上述支持部的上述平坦部之間更具有補強 板。 5·如申請專利範圍第4項之顯示裝置,其中上述補強板經由 黏著層固定在上述平坦部。 6·如申請專利範圍第1或2項之顯示裝置,其中上述支持部 係由彈性體所形成。 7·如申請專利範圍第1或2項之顯示裝置,其中上述基板為 塑膠基板。 O:\88\88035-940930.doc 號專利申請案 Φ女圖式替換本(94年9H 巫二二二―— 月 日修(更)正本Similar to the rabbit 12M81, Yuansha application case, the Chinese version of the book (September 1994), picking up, applying for a patent garden: 1. A display device, comprising: a display panel having a substrate; and a frame, wherein a peripheral portion of the display panel has a support portion that supports the display panel on a main surface of the substrate, and the support portion has a flat portion that is flat with respect to the main surface of the substrate and a first curved portion that is provided along the flat portion. The main surface of the substrate is directly or indirectly fixed to the flat surface, and a gap is formed between the main surface of the substrate and the second curved portion in a state where an external force is not applied to the substrate. 2. The display device according to claim 1, wherein the support portion has a second bent portion that faces the first curved portion. 3. The display device of claim 2, wherein the main surface of the substrate is fixed to the flat portion via an adhesive layer. 4. The display device of claim 2 or 2, wherein the reinforcing plate is further provided between the king face of the substrate and the flat portion of the support portion. 5. The display device of claim 4, wherein the reinforcing plate is fixed to the flat portion via an adhesive layer. 6. The display device of claim 1 or 2, wherein the support portion is formed of an elastomer. 7. The display device of claim 1 or 2, wherein the substrate is a plastic substrate. O:\88\88035-940930.doc Patent Application Φ Female Figure Replacement (94 years 9H Wu 2222 - Monthly Repair (more) original 12485351248535 12485351248535 12485351248535 1248535 e S $1248535 e S $ 12485351248535 8803588035
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