CN110649082B - Display panel - Google Patents
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- CN110649082B CN110649082B CN201910951600.9A CN201910951600A CN110649082B CN 110649082 B CN110649082 B CN 110649082B CN 201910951600 A CN201910951600 A CN 201910951600A CN 110649082 B CN110649082 B CN 110649082B
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Abstract
本发明公开了一种显示面板，包括：一第一基板，具有一显示区；一薄膜晶体管元件，设置在该第一基板的一表面上；一绝缘层，设置在该第一基板上，其中该绝缘层具有一接触孔，且该接触孔设置在该显示区中；一第二金属线，其中部分的该第二金属线设置在该接触孔中；以及一有机显示介质，设置在该第二金属线上；其中于一剖面图中从该接触孔的一侧壁起算，该部分的该第二金属线于平行该第一基板的该表面的法线方向上的厚度具有厚薄厚的变化。
The present invention discloses a display panel, comprising: a first substrate having a display area; a thin film transistor element arranged on a surface of the first substrate; an insulating layer arranged on the first substrate, wherein the insulating layer has a contact hole, and the contact hole is arranged in the display area; a second metal line, wherein a portion of the second metal line is arranged in the contact hole; and an organic display medium is arranged on the second metal line; wherein in a cross-sectional view, starting from a side wall of the contact hole, the thickness of the portion of the second metal line in a normal direction parallel to the surface of the first substrate has a thickness variation.
Description
本申请是分案申请，母案的申请号：201510150718.3，申请日：2015年4月1日，名称：显示面板。This application is a divisional application, the application number of the parent application is: 201510150718.3, the application date is: April 1, 2015, and the name is: display panel.
技术领域Technical Field
本发明涉及一种显示面板，尤其是涉及一种具有特殊形状设计金属层的显示面板。The present invention relates to a display panel, and in particular to a display panel with a metal layer designed in a special shape.
背景技术Background technique
随着显示器技术不断进步，所有的显示装置均朝体积小、厚度薄、重量轻等趋势发展，故目前市面上主流的显示器装置已由以往的阴极射线管发展成平面显示器，如液晶显示装置或有机发光二极管显示装置等。其中，液晶显示装置或有机发光二极管显示装置可应用的领域相当多，例如日常生活中使用的手机、笔记本电脑、摄影机、照相机、音乐播放器、导航装置、电视等显示装置，大多数均使用这些显示面板。With the continuous advancement of display technology, all display devices are developing towards the trend of small size, thin thickness, light weight, etc. Therefore, the mainstream display devices on the market have developed from the previous cathode ray tube to flat display, such as liquid crystal display devices or organic light emitting diode display devices. Among them, liquid crystal display devices or organic light emitting diode display devices can be applied in quite a lot of fields, such as mobile phones, laptops, video cameras, cameras, music players, navigation devices, televisions and other display devices used in daily life, most of which use these display panels.
虽然液晶显示装置或有机发光二极管显示装置已为市面上常见的显示装置，特别是液晶显示装置的技术更是相当成熟，但随着显示装置不断发展且消费者对显示装置的显示品质要求日趋提高，各家厂商无不极力发展出具有更高显示品质的显示装置。其中，薄膜晶体管基板的结构，也为影响显示品质的因素之一。Although liquid crystal display devices or organic light emitting diode display devices are common display devices on the market, and the technology of liquid crystal display devices is particularly mature, with the continuous development of display devices and consumers' increasing requirements for display quality, all manufacturers are striving to develop display devices with higher display quality. Among them, the structure of the thin film transistor substrate is also one of the factors that affect the display quality.
有鉴于此，即便目前液晶显示装置或有机发光二极管显示装置已为市面上常见的显示装置，但仍需针对薄膜晶体管基板提出改良，以期能发展出具有更佳显示品质的显示装置，以便符合消费者需求。Therefore, even though liquid crystal display devices or organic light emitting diode display devices are common display devices on the market, improvements are still needed on thin film transistor substrates in order to develop display devices with better display quality to meet consumer demand.
发明内容Summary of the invention
本发明涉及一种显示面板，通过设计非显示区的金属线形状以增加胶材在金属线上的附着力，同时设计显示区中金属线的形状，以降低显示区中金属线的阻抗。The invention relates to a display panel, which increases the adhesion of glue on the metal wires by designing the shape of metal wires in a non-display area, and reduces the impedance of the metal wires in the display area by designing the shape of metal wires in the display area.
本发明的一实施例是提供一种显示面板，包括：一第一基板；一第一金属线，设置在该第一基板上，其中该第一金属线具有一第一表面与一第一侧壁，其中该第一侧壁与该第一表面连接，且该第一侧壁具有一内凹形状；以及一胶材，覆盖该第一表面及该第一侧壁。An embodiment of the present invention provides a display panel, comprising: a first substrate; a first metal line disposed on the first substrate, wherein the first metal line has a first surface and a first side wall, wherein the first side wall is connected to the first surface and has a concave shape; and a glue material covering the first surface and the first side wall.
此实施例的显示面板中，该第一金属线包括一第一金属层及一第二金属层，该第二金属层位于该第一金属层与该第一基板之间，且该胶材覆盖该第一金属层。In the display panel of this embodiment, the first metal line includes a first metal layer and a second metal layer, the second metal layer is located between the first metal layer and the first substrate, and the adhesive covers the first metal layer.
此实施例的显示面板中，该第二金属层的第一侧壁比该第一金属层的第一侧壁更远离该第一基板的一基板边缘。In the display panel of this embodiment, the first side wall of the second metal layer is farther away from a substrate edge of the first substrate than the first side wall of the first metal layer.
此实施例的显示面板中，该第一金属线还包括一第三金属层，且该第二金属层位于该第一金属层与该第三金属层之间，其中该胶材更位于该第一金属层与该第三金属层之间。In the display panel of this embodiment, the first metal line further includes a third metal layer, and the second metal layer is located between the first metal layer and the third metal layer, wherein the glue is further located between the first metal layer and the third metal layer.
此实施例的显示面板中，该第二金属层的第一侧壁比该第一金属层及该第三金属层的第一侧壁更远离该第一基板的一基板边缘。In the display panel of this embodiment, the first side wall of the second metal layer is farther away from a substrate edge of the first substrate than the first side walls of the first metal layer and the third metal layer.
此实施例的显示面板中，该第一表面与该第一侧壁的夹角为一锐角。In the display panel of this embodiment, the included angle between the first surface and the first side wall is an acute angle.
此实施例的显示面板中，该第一金属线更具有一第二表面，位于该第一表面的相对且与该第一侧壁连接，且该第二表面与该第一侧壁的夹角为一锐角。In the display panel of this embodiment, the first metal line further has a second surface located opposite to the first surface and connected to the first side wall, and the included angle between the second surface and the first side wall is an acute angle.
此实施例的显示面板中，该胶材为一玻璃胶材。In the display panel of this embodiment, the adhesive is a glass adhesive.
此实施例的显示面板中，该第一基板具有一显示区及设置在该显示区外的一非显示区，该第一金属线设置在该非显示区中，且该显示面板还包括：一绝缘层，设置在该第一基板上，且该绝缘层具有一接触孔，设置在该显示区中；一第二金属线，设置在该接触孔中，具有一第三表面，该第三表面具有一中间区与一周缘区，其中该周缘区比该中间区更邻近该接触孔的一侧壁，且该中间区较该周缘区凸出。In the display panel of this embodiment, the first substrate has a display area and a non-display area arranged outside the display area, the first metal line is arranged in the non-display area, and the display panel also includes: an insulating layer arranged on the first substrate, and the insulating layer has a contact hole arranged in the display area; a second metal line, arranged in the contact hole, has a third surface, the third surface has a middle area and a peripheral area, wherein the peripheral area is closer to a side wall of the contact hole than the middle area, and the middle area protrudes more than the peripheral area.
本发明的另一实施例是提供一种显示面板，包括：一第一基板，具有一显示区；一绝缘层，设置在该第一基板上，且该绝缘层具有一接触孔，设置在该显示区中；一第二金属线，设置在该接触孔中，具有一第三表面，该第三表面具有一中间区与一周缘区，其中该周缘区比该中间区更邻近该接触孔的一侧壁，且该中间区较该周缘区凸出。Another embodiment of the present invention is to provide a display panel, comprising: a first substrate having a display area; an insulating layer disposed on the first substrate, and the insulating layer having a contact hole disposed in the display area; a second metal line disposed in the contact hole, having a third surface, the third surface having a middle area and a peripheral area, wherein the peripheral area is closer to a side wall of the contact hole than the middle area, and the middle area protrudes more than the peripheral area.
此实施例的显示面板中，该第二金属线包括一第四金属层及第五金属层，该第五金属层位于该第一基板及该第四金属层之间，且该第四金属层具有该第三表面及一第二侧壁，其中该第三表面与该第二侧壁连接且夹角为一钝角。In the display panel of this embodiment, the second metal line includes a fourth metal layer and a fifth metal layer, the fifth metal layer is located between the first substrate and the fourth metal layer, and the fourth metal layer has the third surface and a second side wall, wherein the third surface is connected to the second side wall and the included angle is an obtuse angle.
此实施例的显示面板中，还包括一有机显示介质，设置在该第二金属线上。The display panel of this embodiment further includes an organic display medium disposed on the second metal line.
此实施例的显示面板中，与该中间区相对的该第二金属线厚度大于与该周缘区相对的该第二金属线厚度。In the display panel of this embodiment, the thickness of the second metal line opposite to the middle area is greater than the thickness of the second metal line opposite to the peripheral area.
此实施例的显示面板中，该第一基板还具有一设置在该显示区外的非显示区，且该显示面板还包括：一设置在该非显示区中的第一金属线，其中该第一金属线具有一第一表面与一第一侧壁，该第一侧壁与该第一表面连接，且该第一侧壁具有一内凹形状；以及一胶材，覆盖该第一表面及该第一侧壁。In the display panel of this embodiment, the first substrate also has a non-display area arranged outside the display area, and the display panel also includes: a first metal wire arranged in the non-display area, wherein the first metal wire has a first surface and a first side wall, the first side wall is connected to the first surface, and the first side wall has a concave shape; and a glue material covering the first surface and the first side wall.
此实施例的显示面板中，该胶材为一玻璃胶材。In the display panel of this embodiment, the adhesive is a glass adhesive.
此实施例的显示面板中，该第一金属线包括一第一金属层及一第二金属层，该第二金属层位于该第一金属层与该第一基板之间，且该胶材覆盖该第一金属层。In the display panel of this embodiment, the first metal line includes a first metal layer and a second metal layer, the second metal layer is located between the first metal layer and the first substrate, and the adhesive covers the first metal layer.
此实施例的显示面板中，该第一金属线还包括一第三金属层，且该第二金属层位于该第一金属层与该第三金属层之间，其中该胶材更位于该第一金属层与该第三金属层之间。In the display panel of this embodiment, the first metal line further includes a third metal layer, and the second metal layer is located between the first metal layer and the third metal layer, wherein the glue is further located between the first metal layer and the third metal layer.
此实施例的显示面板中，该第二金属层的第一侧壁比该第一金属层及该第三金属层的第一侧壁更远离该第一基板的一基板边缘。In the display panel of this embodiment, the first side wall of the second metal layer is farther away from a substrate edge of the first substrate than the first side walls of the first metal layer and the third metal layer.
此实施例的显示面板中，该第一表面与该第一侧壁的夹角为一锐角。In the display panel of this embodiment, the included angle between the first surface and the first side wall is an acute angle.
此实施例的显示面板中，该第一金属线还具有一第二表面，位于该第一表面的相对且与该第一侧壁连接，且该第二表面与该第二侧壁的夹角为一锐角。In the display panel of this embodiment, the first metal line further has a second surface, which is located opposite to the first surface and connected to the first side wall, and the included angle between the second surface and the second side wall is an acute angle.
在本发明前述实施例所提供的显示面板中，通过设计非显示区的金属线形状，特别是将非显示区的金属线的侧壁设计成具有一内凹形状，而得以提升胶材在涂布过程中对于金属线的附着力，而避免胶材的剥落。同时，通过设计显示区的金属线形状，特别是将接触孔中的金属线设计成中央区较周缘区凸出，而可增加金属线的横截面积，进而降低显示面板操作中的金属线阻抗。在此，显示区的金属线形状并不具有如非显示区金属线的内凹形状，而是显示区金属线的表面与侧壁间的夹角为一钝角而使得金属线侧壁呈现一相对平滑的斜线形状，由此可避免诸如非显示区金属线的表面与侧壁间所夹锐角所造成的电荷累积而有尖端放电的情形的发生，从而可以防止显示区抗静电能力的劣化。In the display panel provided by the aforementioned embodiment of the present invention, by designing the shape of the metal wire in the non-display area, especially by designing the side wall of the metal wire in the non-display area to have a concave shape, the adhesion of the adhesive to the metal wire during the coating process is improved, thereby avoiding the peeling of the adhesive. At the same time, by designing the shape of the metal wire in the display area, especially by designing the metal wire in the contact hole to be protruding in the central area compared to the peripheral area, the cross-sectional area of the metal wire can be increased, thereby reducing the metal wire impedance during the operation of the display panel. Here, the shape of the metal wire in the display area does not have a concave shape like the metal wire in the non-display area, but the angle between the surface of the metal wire in the display area and the side wall is an obtuse angle, so that the side wall of the metal wire presents a relatively smooth oblique line shape, thereby avoiding the occurrence of situations such as charge accumulation caused by the acute angle between the surface of the metal wire in the non-display area and the side wall, thereby preventing the degradation of the antistatic ability of the display area.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是本发明一优选实施例的有机发光二极管显示面板的剖面示意图；FIG1 is a cross-sectional schematic diagram of an organic light emitting diode display panel according to a preferred embodiment of the present invention;
图2是本发明一优选实施例的有机发光二极管显示面板的电路布线示意图；FIG2 is a schematic diagram of circuit wiring of an organic light emitting diode display panel according to a preferred embodiment of the present invention;
图3是本发明一优选实施例的有机发光二极管显示面板的薄膜晶体管基板示意图；FIG3 is a schematic diagram of a thin film transistor substrate of an organic light emitting diode display panel according to a preferred embodiment of the present invention;
图4A是本发明一优选实施例的有机发光二极管显示面板的显示区及非显示区的部分剖面示意图；4A is a partial cross-sectional schematic diagram of a display area and a non-display area of an organic light emitting diode display panel according to a preferred embodiment of the present invention;
图4B是本发明另一优选实施例的有机发光二极管显示面板的显示区及非显示区的部分剖面示意图。4B is a partial cross-sectional schematic diagram of a display area and a non-display area of an organic light emitting diode display panel according to another preferred embodiment of the present invention.
【附图标记说明】[Description of Reference Numerals]
101 有源层 102 第一绝缘层101 active layer 102 first insulating layer
103 下层金属层 104 第二绝缘层103 lower metal layer 104 second insulating layer
105 上层金属层 11 第一基板105 upper metal layer 11 first substrate
111 基板边缘 1121 接触孔111 substrate edge 1121 contact hole
115 第一金属线 1151 第一表面115 first metal line 1151 first surface
1152 第一侧壁 1153 第二表面1152 first side wall 1153 second surface
115a 第一金属层 115b 第二金属层115a first metal layer 115b second metal layer
115c 第三金属层 116 第二金属线115c Third metal layer 116 Second metal line
1161 第三表面 1162 第二侧壁1161 third surface 1162 second side wall
116a 第四金属层 116b 第五金属层116a fourth metal layer 116b fifth metal layer
116c 第六金属层 12 第二基板116c sixth metal layer 12 second substrate
13 胶材 14 支撑元件13 Adhesive material 14 Supporting element
15 有机发光二极管单元 151 第一电极15 organic light emitting diode unit 151 first electrode
152 有机显示介质 153 第二电极152 Organic display medium 153 Second electrode
16 像素界定层 A 显示区16 pixels define the layer A display area
B 非显示区 C 电容区B Non-display area C Capacitor area
D1、D2、D3 距离 TFT1、TFT2 薄膜晶体管元件区D1, D2, D3 Distance TFT1, TFT2 Thin film transistor element area
P1 中间区 P2 周缘区P1 Middle area P2 Peripheral area
θ1、θ2 锐角 θ3 钝角θ1, θ2 acute angle θ3 obtuse angle
具体实施方式Detailed ways
以下是通过特定的具体实施例说明本发明的实施方式，本领域技术人员可由本说明书所公开的内容轻易地了解本发明的其他优点与功效。本发明亦可通过其他不同的具体实施例加以实施或应用，本说明书中的各项细节也可针对不同观点与应用，在不背离本发明的精神下进行各种修饰与变更。The following is an explanation of the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways for different viewpoints and applications without departing from the spirit of the present invention.
图1是本发明一优选实施例的有机发光二极管显示面板的剖面示意图。在有机发光二极管显示面板的制作过程中，先提供一第一基板11及一第二基板12。其中，第一基板11上设置有一有机发光二极管单元15及一像素界定层16，其中每一像素界定层16设置在两相邻的有机发光二极管单元15之间。同时，第二基板12上则设置有多个支撑元件14，并在第二基板12的边缘先形成有一胶材13(在本实施例中，为一玻璃胶材)，且胶材13是透过点胶及加热烧结工艺粘合在第二基板12上。接着，将第一基板11及第二基板12进行对组，其中第二基板12上的支撑元件14是对应于像素界定层16的未形成有像素开口161的区域。而后，以激光加热的方式，使胶材13与第一基板11进行接合，而制得本实施例的有机发光二极管显示面板。FIG. 1 is a cross-sectional schematic diagram of an organic light emitting diode display panel according to a preferred embodiment of the present invention. In the process of manufacturing the organic light emitting diode display panel, a first substrate 11 and a second substrate 12 are first provided. An organic light emitting diode unit 15 and a pixel defining layer 16 are provided on the first substrate 11, wherein each pixel defining layer 16 is provided between two adjacent organic light emitting diode units 15. At the same time, a plurality of supporting elements 14 are provided on the second substrate 12, and a glue material 13 (in this embodiment, a glass glue material) is first formed on the edge of the second substrate 12, and the glue material 13 is bonded to the second substrate 12 through a dispensing and heating sintering process. Next, the first substrate 11 and the second substrate 12 are assembled, wherein the supporting element 14 on the second substrate 12 corresponds to the area of the pixel defining layer 16 where the pixel opening 161 is not formed. Then, the glue material 13 is bonded to the first substrate 11 by laser heating, and the organic light emitting diode display panel of this embodiment is obtained.
在本实施例中，第一基板11及第二基板12均为玻璃基板。此外，本实施例的有机发光二极管显示面板包括一显示区A及一非显示区B，所谓的非显示区B即走线分布的区域，而所谓的显示区A则为布设有前述有机发光二极管单元15以及薄膜晶体管元件(图中未示出)的区域。再则，在本实施例中，每一有机发光二极管单元15可分别发出红光、绿光及蓝光，但其他实施例并不仅限于此；举例来说，有机发光二极管单元15可为一白光有机发光二极管单元，在此情形下，第一基板11或第二基板12的其中一侧更需设置一彩色滤光元件(图中未示出)。In the present embodiment, the first substrate 11 and the second substrate 12 are both glass substrates. In addition, the organic light emitting diode display panel of the present embodiment includes a display area A and a non-display area B, the so-called non-display area B is the area where the wiring is distributed, and the so-called display area A is the area where the aforementioned organic light emitting diode units 15 and thin film transistor elements (not shown in the figure) are arranged. Furthermore, in the present embodiment, each organic light emitting diode unit 15 can emit red light, green light and blue light respectively, but other embodiments are not limited to this; for example, the organic light emitting diode unit 15 can be a white light organic light emitting diode unit, in which case, a color filter element (not shown in the figure) needs to be set on one side of the first substrate 11 or the second substrate 12.
此外，在本实施例的有机发光二极管显示面板中，有机发光二极管单元15包括在第一基板11上依序叠置的一第一电极151、一有机显示介质152及一第二电极153；其中，第一电极151与第一基板11上的薄膜晶体管元件(图中未示出)电连接，而像素界定层16设置在第一电极151与有机显示介质152之间，且透过像素界定层16的画素开口161以定义出光区域。In addition, in the organic light emitting diode display panel of the present embodiment, the organic light emitting diode unit 15 includes a first electrode 151, an organic display medium 152 and a second electrode 153 stacked in sequence on the first substrate 11; wherein the first electrode 151 is electrically connected to the thin film transistor element (not shown in the figure) on the first substrate 11, and the pixel defining layer 16 is arranged between the first electrode 151 and the organic display medium 152, and the pixel opening 161 of the pixel defining layer 16 is used to define the light emitting area.
再则，在本实施例的有机发光二极管显示面板中，第一电极151可选用本发明所属技术领域已知的反射电极或透明电极，而第二电极153可选用本发明所属技术领域已知的透明电极或半透明电极。其中，反射电极可为Ag、Ge、Al、Cu、Mo、Ti、Sn、AlNd、ACX、APC等所制成的电极；透明电极可为透明氧化物电极(TCO电极)，如ITO电极或IZO电极；而半透明电极可为一金属薄膜电极，如镁银合金薄膜电极、金薄膜电极、铂薄膜电极、铝薄膜电极等。此外，若需要，本发明的第二电极153可选用透明电极与半透明电极的复合电极，如：TCO电极与铂薄膜电极的复合电极。在此，仅以包含有第一电极151、有机显示介质152及第二电极153的有机发光二极管元件作为举例，但本发明并不仅限于此；其他本技术领域常用的有机发光二极管元件均可应用于本发明的有机发光二极管显示面板中，例如：包括电子传输层、电子注入层、空穴传输层、空穴注入层及其他可帮助电子空穴传输结合的层的有机发光二极管元件均可应用于本发明中。Furthermore, in the organic light emitting diode display panel of the present embodiment, the first electrode 151 may be a reflective electrode or a transparent electrode known in the technical field of the present invention, and the second electrode 153 may be a transparent electrode or a semi-transparent electrode known in the technical field of the present invention. The reflective electrode may be an electrode made of Ag, Ge, Al, Cu, Mo, Ti, Sn, AlNd, ACX, APC, etc.; the transparent electrode may be a transparent oxide electrode (TCO electrode), such as an ITO electrode or an IZO electrode; and the semi-transparent electrode may be a metal thin film electrode, such as a magnesium-silver alloy thin film electrode, a gold thin film electrode, a platinum thin film electrode, an aluminum thin film electrode, etc. In addition, if necessary, the second electrode 153 of the present invention may be a composite electrode of a transparent electrode and a semi-transparent electrode, such as a composite electrode of a TCO electrode and a platinum thin film electrode. Here, only an organic light emitting diode element including a first electrode 151, an organic display medium 152 and a second electrode 153 is taken as an example, but the present invention is not limited thereto; other organic light emitting diode elements commonly used in the technical field can be applied to the organic light emitting diode display panel of the present invention, for example: organic light emitting diode elements including an electron transport layer, an electron injection layer, a hole transport layer, a hole injection layer and other layers that can help electron-hole transport combination can be applied to the present invention.
图2是本实施例的有机发光二极管显示面板的一像素单元的电路布线示意图。如图2所示，在本实施例的有机发光二极管显示面板中，每一像素单元分别包括：一扫描线、一数据线、一电容线、一电源供给线、一开关薄膜晶体管元件(如图2的开关TFT所示)、一驱动薄膜晶体管元件(如图2的驱动TFT所示)、一储存电容及一分别与第一电极及第二电极连接的有机发光二极管元件(如图2的OLED所示)。FIG2 is a schematic diagram of the circuit wiring of a pixel unit of the organic light emitting diode display panel of the present embodiment. As shown in FIG2, in the organic light emitting diode display panel of the present embodiment, each pixel unit includes: a scan line, a data line, a capacitor line, a power supply line, a switch thin film transistor element (as shown in the switch TFT of FIG2), a drive thin film transistor element (as shown in the drive TFT of FIG2), a storage capacitor and an organic light emitting diode element (as shown in the OLED of FIG2) connected to the first electrode and the second electrode respectively.
图3是本实施例的有机发光二极管显示面板的薄膜晶体管基板的剖面示意图。请同时参照图1及图3，本实施例的薄膜晶体管基板包括：一第一基板11；以及其上方所设置的薄膜晶体管元件。如图3所示，在图1的显示区A中，首先，提供一第一基板11，其上方还形成有一有源层101，其是由非晶硅激光退火后所形成的多晶硅层。接着，在第一基板11上依序形成一第一绝缘层102、一下层金属层103及一第二绝缘层104。其中，位于薄膜晶体管元件区TFT1、TFT2中的下层金属层103作为一栅极；而第一绝缘层102是作为一栅极绝缘层，其材料为本技术领域常用的绝缘层材料，如氧化硅、氮化硅等；同样的，第二绝缘层104也可使用前述本技术领域常用的绝缘层材料所制成。而后，再在第二绝缘层104上形成一上层金属层105。其中，位于薄膜晶体管元件区TFT1、TFT2中的上层金属层105更贯穿第一绝缘层102及第二绝缘层104，而做为源极及漏极，以与有源层101电连接。如此，则完成本实施例的薄膜晶体管基板。FIG3 is a cross-sectional schematic diagram of the thin film transistor substrate of the organic light emitting diode display panel of the present embodiment. Please refer to FIG1 and FIG3 simultaneously. The thin film transistor substrate of the present embodiment includes: a first substrate 11; and a thin film transistor element arranged on the first substrate 11. As shown in FIG3, in the display area A of FIG1, first, a first substrate 11 is provided, and an active layer 101 is formed on the first substrate 11, which is a polysilicon layer formed by laser annealing of amorphous silicon. Then, a first insulating layer 102, a lower metal layer 103 and a second insulating layer 104 are sequentially formed on the first substrate 11. Among them, the lower metal layer 103 located in the thin film transistor element area TFT1 and TFT2 serves as a gate; and the first insulating layer 102 serves as a gate insulating layer, and its material is an insulating layer material commonly used in the technical field, such as silicon oxide, silicon nitride, etc.; similarly, the second insulating layer 104 can also be made of the aforementioned insulating layer material commonly used in the technical field. Then, an upper metal layer 105 is formed on the second insulating layer 104. The upper metal layer 105 in the thin film transistor element regions TFT1 and TFT2 further penetrates the first insulating layer 102 and the second insulating layer 104 and serves as a source and a drain to be electrically connected to the active layer 101. Thus, the thin film transistor substrate of this embodiment is completed.
在本实施例中，薄膜晶体管基板包含有两个薄膜晶体管元件区TFT1、TFT2，其中薄膜晶体管元件区TFT1是对应于图2的开关TFT，薄膜晶体管元件区TFT2则对应于图2的驱动TFT。此外，在本实施例中，除了薄膜晶体管元件区TFT1、TFT2外，还同时形成一电容区C，其对应于图2的储存电容。在此，薄膜晶体管基板上的薄膜晶体管元件为低温多晶硅薄膜晶体管；然而，在其他实施例中，薄膜晶体管的形式与结构并不仅限于图3所示的薄膜晶体管元件。此外，在本发明其他实施例中，薄膜晶体管元件并非仅包括如图3所示的各层，亦可包括其他层，如缓冲层及其他绝缘层，以帮助各层之间的附着性及薄膜晶体管元件的电学性能。In the present embodiment, the thin film transistor substrate includes two thin film transistor element areas TFT1 and TFT2, wherein the thin film transistor element area TFT1 corresponds to the switch TFT of FIG. 2, and the thin film transistor element area TFT2 corresponds to the driving TFT of FIG. 2. In addition, in the present embodiment, in addition to the thin film transistor element areas TFT1 and TFT2, a capacitor area C is also formed at the same time, which corresponds to the storage capacitor of FIG. 2. Here, the thin film transistor element on the thin film transistor substrate is a low temperature polycrystalline silicon thin film transistor; however, in other embodiments, the form and structure of the thin film transistor are not limited to the thin film transistor element shown in FIG. 3. In addition, in other embodiments of the present invention, the thin film transistor element does not only include the layers shown in FIG. 3, but may also include other layers, such as a buffer layer and other insulating layers, to help the adhesion between the layers and the electrical performance of the thin film transistor element.
在本实施例中，上层金属层可以以本技术领域已知的方法形成，例如沉积法、电镀法等。在此，为了提升上层金属层在非显示区的附着力并降低上层金属层在显示区中的阻抗，可在形成上层金属层后利用掩膜进行后续图案化工艺(如，使用掩膜进行蚀刻)，以使上层金属层具有预定图案；或者直接以印刷法形成具有预定图案的上层金属层。In this embodiment, the upper metal layer can be formed by a method known in the art, such as a deposition method, an electroplating method, etc. Here, in order to improve the adhesion of the upper metal layer in the non-display area and reduce the impedance of the upper metal layer in the display area, a subsequent patterning process (e.g., etching using a mask) can be performed after the upper metal layer is formed so that the upper metal layer has a predetermined pattern; or the upper metal layer with a predetermined pattern can be directly formed by a printing method.
下面将详细描述本实施例的上层金属层在显示区及非显示区上结构的差别。The differences in the structures of the upper metal layer in the display area and the non-display area of this embodiment will be described in detail below.
请参照图4A，其为本实施例的有机发光二极管显示面板的显示区及非显示区的部分剖面示意图，其中图4A左侧所示为图1的非显示区B的部分剖面示意图，而右侧所示为图1的显示区A且特别是图3区域E的部分剖面示意图。Please refer to Figure 4A, which is a partial cross-sectional schematic diagram of the display area and non-display area of the organic light emitting diode display panel of the present embodiment, wherein the left side of Figure 4A shows a partial cross-sectional schematic diagram of the non-display area B of Figure 1, and the right side shows a partial cross-sectional schematic diagram of the display area A of Figure 1 and especially the area E of Figure 3.
如图4A所示，在本实施例的有机发光二极管显示面板的非显示区中，显示面板包括：一第一基板11，具有一基板边缘111；一第一金属线115，设置在第一基板11上，其中第一金属线115为前述形成的上层金属层所包括的其中的一金属线，且第一金属线115具有一第一表面1151、一第二表面1153及一第一侧壁1152，其中，第二表面1153位于第一表面1151的相对侧，且第一侧壁1152位于第一表面1151及第二表面1153之间并与第一表面1151及第二表面1153连接；以及一胶材13，覆盖第一表面1151及第一侧壁1152。更具体地，胶材13覆盖部分第一表面1151及整个第一侧壁1152。As shown in FIG4A , in the non-display area of the organic light emitting diode display panel of the present embodiment, the display panel includes: a first substrate 11 having a substrate edge 111; a first metal line 115 disposed on the first substrate 11, wherein the first metal line 115 is one of the metal lines included in the upper metal layer formed above, and the first metal line 115 has a first surface 1151, a second surface 1153 and a first side wall 1152, wherein the second surface 1153 is located on the opposite side of the first surface 1151, and the first side wall 1152 is located between the first surface 1151 and the second surface 1153 and connected to the first surface 1151 and the second surface 1153; and a glue 13 covering the first surface 1151 and the first side wall 1152. More specifically, the glue 13 covers a portion of the first surface 1151 and the entire first side wall 1152.
在本实施例中，第一金属线115的第一侧壁1152具有一内凹形状。更具体地，第一金属线115包括一第一金属层115a、一第二金属层115b及一第三金属层115c，第二金属层115b位于第一金属层115a及第一基板11之间且位于第一金属层115a与第三金属层115c之间。因此，胶材13覆盖第一金属层115a，且更位于第一金属层115a与第三金属层115c之间。换言之，与第二金属层115b对应的第一侧壁1152比与第一金属层115a及第三金属层115c对应的第一侧壁1152更远离第一基板11的基板边缘111；即与第二金属层115b对应的第一侧壁1152上的任一端点与第一基板11的基板边缘111延伸线的距离D2，大于与第一金属层115a及第三金属层115c对应的第一侧壁1152上的端点与第一基板11的基板边缘111延伸线的最短距离D1、D3。更换言之，第一金属线115的第一表面1151与第一侧壁1152的夹角为一锐角θ1，且第二表面1153与第一侧壁1152的夹角为另一锐角θ2；在本实施例中，锐角θ1、θ2并无特殊限制，只要是介于0度及90度之间的角度即可。此外，第一侧壁1152除了具有一内凹形状外，还具有一不规则表面。In the present embodiment, the first sidewall 1152 of the first metal line 115 has a concave shape. More specifically, the first metal line 115 includes a first metal layer 115a, a second metal layer 115b and a third metal layer 115c, and the second metal layer 115b is located between the first metal layer 115a and the first substrate 11 and between the first metal layer 115a and the third metal layer 115c. Therefore, the adhesive 13 covers the first metal layer 115a and is further located between the first metal layer 115a and the third metal layer 115c. In other words, the first side wall 1152 corresponding to the second metal layer 115b is farther away from the substrate edge 111 of the first substrate 11 than the first side walls 1152 corresponding to the first metal layer 115a and the third metal layer 115c; that is, the distance D2 between any end point on the first side wall 1152 corresponding to the second metal layer 115b and the extension line of the substrate edge 111 of the first substrate 11 is greater than the shortest distances D1 and D3 between the end points on the first side wall 1152 corresponding to the first metal layer 115a and the third metal layer 115c and the extension line of the substrate edge 111 of the first substrate 11. In other words, the angle between the first surface 1151 of the first metal line 115 and the first side wall 1152 is an acute angle θ1, and the angle between the second surface 1153 and the first side wall 1152 is another acute angle θ2; in this embodiment, the acute angles θ1 and θ2 are not particularly limited, as long as they are angles between 0 degrees and 90 degrees. In addition, the first side wall 1152 has an irregular surface in addition to having a concave shape.
如上所述，在本实施例的薄膜晶体管基板中，第一金属线115是设计成其第一侧壁1152具有一内凹形状，而可增加第一金属线115与胶材13之间的附着力，胶材13在涂布时不易剥落，而提升显示面板的合格率。此外，更通过将第一金属线115的第一侧壁1152设计成一不规则表面，而更进一步提升第一金属线115与胶材13之间的附着力。As described above, in the thin film transistor substrate of the present embodiment, the first metal line 115 is designed such that its first side wall 1152 has a concave shape, which can increase the adhesion between the first metal line 115 and the adhesive 13, and the adhesive 13 is not easy to peel off during coating, thereby improving the qualified rate of the display panel. In addition, by designing the first side wall 1152 of the first metal line 115 to be an irregular surface, the adhesion between the first metal line 115 and the adhesive 13 is further improved.
然而，若在显示区中的金属线设计成像非显示区的第一金属线一样具有一内凹形状，则靠近金属线表面的尖角容易累积电荷，使得抗静电能力降低。因此，在本发明的有机发光二极管显示面板中，显示区中的金属线与非显示区中的金属线设计并不相同。However, if the metal line in the display area is designed to have a concave shape like the first metal line in the non-display area, the sharp corners near the surface of the metal line are prone to accumulate charges, resulting in reduced anti-static ability. Therefore, in the organic light emitting diode display panel of the present invention, the metal line in the display area is designed differently from the metal line in the non-display area.
如图3及图4A所示，在本实施例的有机发光二极管显示面板的显示区中，显示面板包括：一第一基板11；一绝缘层(第一绝缘层102及第二绝缘层104)，设置在第一基板11上，且绝缘层(第一绝缘层102及第二绝缘层104)具有一接触孔1121；一第二金属线116，设置在接触孔1121中，其中第二金属线116为前述形成的上层金属层所包括的其中的一金属线，且第二金属线116具有一第三表面1161及一与第三表面1161连接的第二侧壁1162，第三表面1161具有一中间区P1与一周缘区P2，其中周缘区P2比中间区P1更邻近接触孔1121的侧壁，且中间区P1较周缘区P2凸出。更具体地，中间区P1的第二金属线116厚度大于与周缘区P2相对的第二金属线116厚度。通过将第二金属线116的中间区P1设计成较周缘区P2凸出，可增加第二金属线116的横截面积，由此可降低第二金属线116的阻抗，而提升薄膜晶体管元件的电学性能。As shown in FIG. 3 and FIG. 4A , in the display area of the organic light emitting diode display panel of the present embodiment, the display panel includes: a first substrate 11; an insulating layer (a first insulating layer 102 and a second insulating layer 104) disposed on the first substrate 11, and the insulating layer (the first insulating layer 102 and the second insulating layer 104) has a contact hole 1121; a second metal line 116 disposed in the contact hole 1121, wherein the second metal line 116 is one of the metal lines included in the upper metal layer formed above, and the second metal line 116 has a third surface 1161 and a second sidewall 1162 connected to the third surface 1161, and the third surface 1161 has a middle area P1 and a peripheral area P2, wherein the peripheral area P2 is closer to the sidewall of the contact hole 1121 than the middle area P1, and the middle area P1 is more protruding than the peripheral area P2. More specifically, the thickness of the second metal line 116 in the middle area P1 is greater than the thickness of the second metal line 116 opposite to the peripheral area P2. By designing the middle region P1 of the second metal line 116 to be more protruding than the peripheral region P2 , the cross-sectional area of the second metal line 116 can be increased, thereby reducing the impedance of the second metal line 116 and improving the electrical performance of the thin film transistor element.
此外，在本实施例的有机发光二极管显示面板的显示区中，第二金属线116包括一第四金属层116a、一第五金属层116b及一第六金属层116c，其中第五金属层116b位于第一基板11及第四金属层116a之间且位于第四金属层116a及第六金属层116c之间。在此，第四金属层116a具有第三表面1161及第二侧壁1162，其中第三表面1161与第二侧壁1162的夹角为一钝角θ3。在本实施例中，钝角θ3的角度并无特别限制，只要是介于90度至180度间的角度即可。In addition, in the display area of the organic light emitting diode display panel of the present embodiment, the second metal line 116 includes a fourth metal layer 116a, a fifth metal layer 116b and a sixth metal layer 116c, wherein the fifth metal layer 116b is located between the first substrate 11 and the fourth metal layer 116a and between the fourth metal layer 116a and the sixth metal layer 116c. Here, the fourth metal layer 116a has a third surface 1161 and a second side wall 1162, wherein the angle between the third surface 1161 and the second side wall 1162 is an obtuse angle θ3. In the present embodiment, the obtuse angle θ3 is not particularly limited, as long as it is an angle between 90 degrees and 180 degrees.
请比较图4A左侧所示的非显示区及右侧所示的显示区，可发现非显示区的第一金属线115的第一侧壁1152为一内凹且不规则表面，而显示区的第二金属线116的第二侧壁1162为一相对平滑的斜面；特别是，非显示区的第一金属线115其第一表面1151及第二表面1153与第一侧壁1152的夹角分别为锐角θ1、θ2，而显示区的第二金属线116其第三表面1161与第二侧壁1162的夹角为一钝角θ3。因此，在本实施例的显示面板中，显示区的第二金属线116不会有如同非显示区的第一金属线115的尖角产生，故可避免显示区有电荷累积的现象，而提升显示区元件的抗静电能力。其中，有机显示介质152(图1)是设置在第二金属线116上。Comparing the non-display area shown on the left side of FIG. 4A with the display area shown on the right side, it can be found that the first sidewall 1152 of the first metal line 115 in the non-display area is a concave and irregular surface, while the second sidewall 1162 of the second metal line 116 in the display area is a relatively smooth inclined surface; in particular, the angles between the first surface 1151 and the second surface 1153 of the first metal line 115 in the non-display area and the first sidewall 1152 are acute angles θ1 and θ2 respectively, while the angle between the third surface 1161 of the second metal line 116 in the display area and the second sidewall 1162 is an obtuse angle θ3. Therefore, in the display panel of the present embodiment, the second metal line 116 in the display area does not have a sharp angle like the first metal line 115 in the non-display area, so that the phenomenon of charge accumulation in the display area can be avoided, and the antistatic ability of the display area element can be improved. Among them, the organic display medium 152 (FIG. 1) is disposed on the second metal line 116.
图4B为本发明的另一优选实施例的有机发光二极管显示面板的显示区及非显示区的部分剖面示意图。其中，本发明另一实施例的有机发光二极管显示面板制作方法及结构与前述实施例相同，除了本发明另一实施例的显示面板中的第一金属线115不包括第三金属层115c，而第二金属线116不包括第六金属层116c。因此，第一金属线115仅包括一第一金属层115a及一第二金属层115b，第二金属层115b位于该第一金属层115a及第一基板11之间，且胶材13覆盖第一金属层115a；同时，第二金属层115b的第一侧壁1152比第一金属层115a的第一侧壁1152更远离第一基板11的基板边缘111。FIG4B is a partial cross-sectional schematic diagram of the display area and non-display area of an organic light emitting diode display panel according to another preferred embodiment of the present invention. The manufacturing method and structure of the organic light emitting diode display panel according to another preferred embodiment of the present invention are the same as those of the aforementioned embodiment, except that the first metal line 115 in the display panel according to another preferred embodiment of the present invention does not include the third metal layer 115c, and the second metal line 116 does not include the sixth metal layer 116c. Therefore, the first metal line 115 only includes a first metal layer 115a and a second metal layer 115b, the second metal layer 115b is located between the first metal layer 115a and the first substrate 11, and the adhesive 13 covers the first metal layer 115a; at the same time, the first side wall 1152 of the second metal layer 115b is farther away from the substrate edge 111 of the first substrate 11 than the first side wall 1152 of the first metal layer 115a.
在本实施例中，如图3、图4A及图4B所示，下层金属层103及作为第一金属线115及第二金属线116的上层金属层105的材料并无特殊限制，可为本技术领域常用的金属电极材料。在本发明的前述实施例中，下层金属层103的材料为钼，第一金属层115a的材料为钛，第二金属层115b的材料为铝，第三金属层115c的材料为钛，第四金属层116a的材料为钛，第五金属层116b的材料为铝，而第七金属层116c的材料为钛。In the present embodiment, as shown in FIG3, FIG4A and FIG4B, the materials of the lower metal layer 103 and the upper metal layer 105 as the first metal line 115 and the second metal line 116 are not particularly limited, and can be metal electrode materials commonly used in the art. In the aforementioned embodiment of the present invention, the material of the lower metal layer 103 is molybdenum, the material of the first metal layer 115a is titanium, the material of the second metal layer 115b is aluminum, the material of the third metal layer 115c is titanium, the material of the fourth metal layer 116a is titanium, the material of the fifth metal layer 116b is aluminum, and the material of the seventh metal layer 116c is titanium.
在本发明的前述实施例所提供的薄膜晶体管基板中，所述的第一金属线与第二金属线可为同一条导线或不同条导线，并无特殊限制，只要是符合前述条件即可。In the thin film transistor substrate provided by the aforementioned embodiment of the present invention, the first metal wire and the second metal wire may be the same conductive line or different conductive lines without any special limitation, as long as the aforementioned conditions are met.
在本发明的实施例中，是以有机发光二极管显示面板作为举例；然而，在本发明的其他实施例中，前述的薄膜晶体管基板也可以用于液晶显示面板上。当前述薄膜晶体管基板应用于液晶显示面板上时，所得的液晶显示面板更与背光模组组合设置，以提供一液晶显示装置。In the embodiment of the present invention, an organic light emitting diode display panel is used as an example; however, in other embodiments of the present invention, the aforementioned thin film transistor substrate can also be used in a liquid crystal display panel. When the aforementioned thin film transistor substrate is applied to a liquid crystal display panel, the resulting liquid crystal display panel is further combined with a backlight module to provide a liquid crystal display device.
本发明前述实施例所制得的显示面板，也可以与本技术领域已知的触控面板合并使用，而作为一触控显示装置。The display panel manufactured in the above-mentioned embodiment of the present invention can also be used in combination with a touch panel known in the art to serve as a touch display device.
本发明前述实施例所制得的显示面板或触控显示装置，可以应用于本技术领域已知的任何需要显示屏幕的电子装置上，如显示器、手机、笔记本电脑、摄影机、照相机、音乐播放器、导航装置、电视等。The display panel or touch display device manufactured in the aforementioned embodiments of the present invention can be applied to any electronic device requiring a display screen known in the art, such as monitors, mobile phones, notebook computers, video cameras, music players, navigation devices, televisions, etc.
以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
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