Patent Publication Number: US-2023161208-A1

Title: Array substrate and display panel

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of Chinese patent application No. 202111421038.2 filed on Nov. 26, 2021, the contents of which are incorporated herein by reference. 
     TECHNICAL FIELD 
     The present application relates to array substrates, and in particular, to an array substrate and a display panel. 
     BACKGROUND 
     Generally, in a typical wiring design of bonding lead, the bonding lead includes data bonding lead, dummy bonding lead, and gate-driver-on-array (GOA) bonding lead. 
     GOA unit test wiring and GOA signal wiring can vary from several to a dozen depending on product resolution and size, and the width of these wirings is limited by the space above and below the GOA bonding lead, that is, the more wirings, the thinner each wiring and the greater the impedance. For narrow-bezel products, the GOA unit test wiring and the GOA signal wiring are even thinner, which may affect the overall design of the product. 
     SUMMARY 
     An embodiment of the present application provides an array substrate and a display panel, in which a wiring area is formed on a first side of a first bonding-lead part and/or a second side of the first bonding-lead part, in order to solve the problem that the first bonding-lead part in the bonding area of the existing array substrates occupies too much space, so that limiting space is provided for the GOA unit test wiring and the GOA signal wiring. 
     In order to achieve the above-mentioned objectives, an aspect of the present application provides an array substrate, which includes a display region and a non-display region. A first bonding-lead part, a second bonding-lead part and a third bonding-lead part are arranged in sequence in a bonding area of the non-display region. A first side of the first bonding-lead part is used for connecting with a gate driver unit test wiring, and a second side of the first bonding-lead part is used for connecting with a gate driver signal wiring. A width of the first bonding-lead part is smaller than a width of the second bonding-lead part, such that a wiring area is formed on the first side of the first bonding-lead part and/or the second side of the first bonding-lead part. 
     In an embodiment of the present application, the first bonding-lead part includes a plurality of GOA bonding lead groups, and the GOA bonding lead groups include at least two GOA bonding leads. 
     In an embodiment of the present application, the first side of the first bonding-lead part has a first wiring area, and the second side of the first bonding-lead part is coplanar with a second side of the second bonding-lead part. 
     In an embodiment of the present application, the first side of the first bonding-lead part is coplanar with a first side of the second bonding-lead part. The second side of the first bonding-lead part has a second wiring area. 
     In an embodiment of the present application, the first side of the first bonding-lead part has a first wiring area; the second side of the first bonding-lead part has a second wiring area. 
     In an embodiment of the present application, the GOA bonding lead is a linear bonding lead, and a first predetermined angle a is formed between an extension direction of the linear bonding lead and an extension direction of the first bonding-lead part. 
     In an embodiment of the present application, the first bonding-lead part includes a first linear extension section and a second linear extension section located between the first linear extension section and the second bonding-lead part. a second predetermined angle b is formed between an extension direction of the first linear extension section and an extension direction of the second linear extension section. 
     In an embodiment of the present application, an avoidance space is formed on one end of the second bonding-lead part close to the first bonding-lead part by reducing the number of bonding leads in the second bonding-lead part. 
     In an embodiment of the present application, the width of the first bonding-lead part is ½ or ⅓ of the width of the second bonding-lead part. 
     Another aspect of the present application provides a display panel, which includes an array substrate, a liquid crystal layer and a color film substrate. The array substrate and the color film substrate are disposed facing each other, and the liquid crystal layer is located between the array substrate and the color film substrate. The array substrate is the above-mentioned array substrate. 
     The present application has the following advantageous effects: compared with existing technologies, in the array substrate of the present application, a wiring area is formed on the first side of the first bonding-lead part, or on the second side of the first bonding-lead part, or on both sides of the first bonding-lead part by changing the width of the first bonding-lead part, so as to provide sufficient wiring space for GOA unit test wiring and GOA signal wiring, which can prevent the GOA unit test wiring and the GOA signal wiring from being too thin, and thus ensure that the impedance is kept within a certain range. Especially for products with narrow bezel, normal wiring and operation of the GOA unit test wiring and the GOA signal wiring can be ensured while controlling the bezel size of the product. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to more clearly illustrate the technical proposals in embodiments of the present application, accompanying drawings that are used in the description of the embodiments or exemplary technologies are briefly introduced hereinbelow. Obviously, the drawings in the following description are merely some embodiments of the present application. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort. 
         FIG.  1    is a structural schematic diagram of an array substrate according to a first embodiment of the present application; 
         FIG.  2    is a partially enlarged view of the bonding area in the first embodiment of the present application; 
         FIG.  3    is a partially enlarged view of the bonding area in a second embodiment of the present application; 
         FIG.  4    is a partially enlarged view of the bonding area in a third embodiment of the present application; 
         FIG.  5    is a partially enlarged view of an arrangement in which the size of the first wiring area is larger than the size of the second wiring area according to the third embodiment of the present application; 
         FIG.  6    is a partially enlarged view of an arrangement in which the size of the first wiring area is less than the size of the second wiring area according to the third embodiment of the present application; 
         FIG.  7    is a partially enlarged view of the bonding area in a fourth embodiment of the present application; 
         FIG.  8    is an enlarged view of the GOA bonding lead in an embodiment of the present application; 
         FIG.  9    is an enlarged view of the first bonding-lead part arranged in V-shape in an embodiment of the present application; and 
         FIG.  10    is a schematic diagram showing an internal structure of the display panel in a fifth embodiment of the present application. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     In order to make the purpose, technical proposals, and advantages of the present application more clearly understood, the present application will be described in further detail hereinbelow with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely used to explain the present application, but not to limit the present application. 
     It should be noted that when an element is referred to as being “fixed to” or “arranged on” another element, it can be directly or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element. The embodiments in this application and the features in the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. 
     It is to be understood that the terms “length”, “width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, etc. for indicating orientations or positional relationships refer to orientations or positional relationships as shown in the accompanying drawings; the terms are for the purpose of illustrating the present application and simplifying the description rather than indicating or implying the device or element must have a certain orientation and be structured or operated by the certain orientation, and therefore cannot be regarded as limitation to the present application. 
     Moreover, terms such as “first” and “second” are merely for the purpose of illustration and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the technical feature. Therefore, features defined by “first” and “second” can explicitly or implicitly include one or more the features. In the description of the present application, unless otherwise indicated, the meaning of “plural” is two or more than two. 
     Referring to  FIGS.  1  to  9   , an aspect of the present application provides an array substrate. The array substrate  2  includes a display region  201  and a non-display region  202 . A first bonding-lead part  10 , a second bonding-lead part  20  and a third bonding-lead part  30  are arranged in sequence in the bonding area  1  of the non-display region  202 . A first side of the first bonding-lead part  10  is used for connecting the gate driver test wiring, and a second side of the first bonding-lead part  10  is used for connecting the gate driver signal wiring. The width of the first bonding-lead part  10  is smaller than the width of the second bonding-lead part  20 , such that a wiring area is formed on the first side of the first bonding-lead part  10  and/or the second side of the first bonding-lead part  10 . The length of the first bonding-lead part  10  herein is along an extension direction of the first bonding-lead part  10 , and the width of the first bonding-lead part  10  is corresponding to the width along a lengthwise direction thereof. The above-mentioned first side and the second side of the first bonding-lead part  10  refer to opposite sides of the first bonding-lead part  10  in the widthwise direction. In the array substrate of the present application, the wiring area is formed on the first side of the first bonding-lead part  10 , or on the second side of the first bonding-lead part  10 , or on both sides of the first bonding-lead part  10  by changing the width of the first bonding-lead part  10 , so as to provide sufficient wiring space for GOA unit test wiring  40  and GOA signal wiring  50 , which can prevent the GOA unit test wiring  40  and the GOA signal wiring  50  from being too thin, and thus ensure that the impedance is within a certain range. Especially for products with narrow bezel, normal wiring and operation of the GOA unit test wiring  40  and the GOA signal wiring  50  can be ensured while controlling the bezel size of the product. The first bonding-lead part, the second bonding-lead part and the third bonding-lead part are arranged in sequence. The third bonding-lead part includes a data bonding-lead part, and a lower end of the data bonding-lead part is connected to a fan-shaped wiring entering into the plane, and an upper end thereof is connected to the data unit test wiring. The second bonding-lead part includes a dummy bonding-lead part, namely the idle bonding-lead part, which is mainly used to prevent short circuit and increase the bonding strength and the like. 
     In this application, the first side of the first bonding-lead part  10  is connected to the GOA unit test wiring  40 , and the second side of the first bonding-lead part  10  is connected to the GOA signal wiring  50 . 
     First Embodiment 
     Referring to  FIG.  2   , the first side of the first bonding-lead part  10  is connected to the GOA unit test wiring  40 , and the second side of the first bonding-lead part  10  is connected to the GOA signal wiring  50 . According to the space required by the GOA signal wiring  50  and the GOA unit test wiring  40 , in the first embodiment of the present application, a first wiring area  60  is arranged on the first side of the first bonding-lead part  10 . Specifically, the first wiring area  60  is formed between the first side of the first bonding-lead part  10  and an extending line along the first side of the second bonding-lead part  20 . The second side of the first bonding-lead part  10  and the second side of the second bonding-lead part  20  are coplanar. In this embodiment, since the GOA unit test wiring  40  located on the first side of the first bonding-lead part  10  requires a larger space, while the GOA signal wiring  50  located on the second side of the first bonding-lead part  10  requires a smaller space, so the first wiring area  60  is correspondingly arranged between the first side of the first bonding-lead part  10  and the first side of the second bonding-lead part  20  in this embodiment, so as to provide sufficient space for the GOA unit test wiring  40  located on the first side of the first bonding-lead part  10 . Meanwhile, in order to minimize the change in the length of the GOA binding leads in the first bonding-lead part  10  hence avoid a significant change in impedance, the second side of the first bonding-lead part  10  and the second side of the second bonding-lead part  20  are coplanar. 
     Second Embodiment 
     Referring to  FIG.  3   , the first side of the first bonding-lead part  10  is connected to the GOA unit test wiring  40 , and the second side of the first bonding-lead part  10  is connected to the GOA signal wiring  50 . According to the space required by the GOA signal wiring  50  and the GOA unit test wiring  40 , in the present embodiment, the first side of the first bonding-lead part  10  and the first side of the second bonding-lead part  20  are coplanar, and a second wiring area  70  is arranged on the second side of the first bonding-lead part  10 . Specifically, the second wiring area  70  is formed between the second side of the first bonding-lead part  10  and an extending line along the second side of the second bonding-lead part  20 . In this embodiment, since the GOA unit test wiring  40  located on the first side of the first bonding-lead part  10  requires a smaller space, while the GOA signal wiring  50  located on the second side of the first bonding-lead part  10  requires a larger space, so the second wiring area  70  is correspondingly arranged between the second side of the first bonding-lead part  10  and the second side of the second bonding-lead part  20  in this embodiment, so as to provide sufficient space for the GOA signal wiring  50  located on the second side of the first bonding-lead part  10 . Meanwhile, in order to minimize the change in the length of the GOA binding leads in the first bonding-lead part  10  hence avoid a significant change in impedance, the first side of the first bonding-lead part  10  and the first side of the second bonding-lead part  20  are co-linear. 
     Third Embodiment 
     Referring to  FIG.  4   , the first side of the first bonding-lead part  10  is connected to the GOA unit test wiring  40 , and the second side of the first bonding-lead part  10  is connected to the GOA signal wiring  50 . According to the space required by the GOA signal wiring  50  and the GOA unit test wiring  40 , a first wiring area  60  is arranged on the first side of the first bonding-lead part  10 , and a second wiring area  70  is arranged on the second side of the first bonding-lead part  10 . Specifically, the first wiring area  60  is formed between the first side of the first bonding-lead part  10  and an extending line along the first side of the second bonding-lead part  20 , and the second wiring area  70  is formed between the second side of the first bonding-lead part  10  and an extending line along the second side of the second bonding-lead part  20 . In this embodiment, since the GOA unit test wiring  40  located on the first side of the first bonding-lead part  10  requires a large space, and the GOA signal wiring  50  located on the second side of the first bonding-lead part  10  also requires a large space, therefore, the first wiring area  60  is arranged between the first side of the first bonding-lead part  10  and the first side of the second bonding-lead part  20  for providing sufficient space for the GOA unit test wiring  40  located on the first side of the first bonding-lead part  10 , and the second wiring area  70  is arranged between the second side of the first bonding-lead part  10  and the second side of the second bonding-lead part  20  for providing sufficient space for the GOA signal wiring  50  located on the second side of the first bonding-lead part  10 . The size of the first wiring area  60  and the size of the second wiring area  70  are the same. 
     Referring to  FIG.  5   , this embodiment also includes a first wiring area  60  and a second wiring area  70 . Differing from the third embodiment, the size of the first wiring area  60  is larger than that of the second wiring area  70  in this embodiment. 
     Referring to  FIG.  6   , this embodiment also includes a first wiring area  60  and a second wiring area  70 . Differing from the third embodiment, the size of the first wiring area  60  is smaller than that of the second wiring area  70  in this embodiment. 
     Referring to  FIG.  2   , in order to fully utilize the space of the first bonding-lead part  10 , the GOA bonding leads in this embodiment are linear bonding leads, and the extension direction of the linear bonding leads is perpendicular to the lengthwise direction of the first bonding-lead part  10 , and the lengthwise direction of the first bonding-lead part  10  is the extension direction thereof. 
     Referring to  FIG.  8   , in other embodiments, the extension direction of the GOA bonding leads may also be diagonal, and the length of the diagonal GOA bonding leads may be shortened and the width thereof may be adjusted. Specifically, the GOA bonding leads in this embodiment are linear bonding leads, having a first predetermined angle a between the extension direction of the linear bonding leads and the extension direction of the first bonding-lead part  10 . The first predetermined angle a may be 30°, 45°, 60°, 75°, and the like, any angle that may save space on the first side and/or the second side of the first bonding-lead part  10 . In a specific embodiment, the width of the first bonding-lead part  10  is reduced, which results in shortening of the GOA bonding leads in the first bonding-lead part  10 , thus an increase in the impedance of single GOA bonding lead. In order to compensate for the increased impedance caused by the length reduction of the GOA bonding lead, in this embodiment, the first bonding-lead part  10  includes a plurality of GOA bonding lead groups  11 , and each GOA bonding lead group  11  includes at least two GOA bonding leads. The first determined angle a is formed between the extension direction of the GOA bonding lead groups  11  and the extension direction of the first bonding-lead part  10 . That is, each GOA bonding lead group  11  corresponds to the previously mentioned single GOA bonding lead, except that each GOA bonding lead group  11  includes at least two GOA bonding leads, replacing the single lead with multiple leads. Therefore, the overall cross-sectional area is increased and the impedance can be reduced, thus compensating for the increased impedance due to length reduction, and each GOA bonding lead is diagonally arranged. The number of GOA bonding leads included in each GOA bonding lead group  11  may be two, three, four, and the like, with the GOA bonding leads arranged in parallel, and the number may be adjusted according to the specific impedance to be compensated. In another embodiment, the GOA bonding lead group  11  may not be provided, instead, a single GOA bonding lead is provided, corresponding to the previously mentioned single GOA bonding lead, and the single GOA bonding lead is arranged such that a first predetermined angle a is formed between the extension direction of the single GOA bonding lead and the extension direction of the first bonding-lead part  10 . The present embodiment differs in that a thickened GOA bonding lead, which is individually manufactured and thicker than the conventional GOA bonding leads, is used, which increases the overall cross-sectional area and reduces the impedance, thereby compensating for the increased impedance due to the reduced length. 
     Referring to  FIG.  9   , in another embodiment, the first bonding-lead part  10  is arranged in a V-shape, and the width of the first bonding-lead part  10  is less than the width of the second bonding-lead part  20  so as to form a wiring area on the first side of the first bonding-lead part  10  and/or the second side of the first bonding-lead part  10 . in the present embodiment, the first bonding-lead part  10  includes a first linear extension section  101  and a second linear extension section  102  located between the first linear extension section  101  and the second bonding-lead part  20 . A second predetermined angle b is formed between the extension direction of the first linear extension section  101  and the extension direction of the second linear extension section  102 , and the second predetermined angle b may be 120°, 135°, 150°, and the like, depending on the specific arrangement of the GOA unit test wiring  40  and the GOA signal wiring  50 . In other embodiments, the first bonding-lead part  10  may be arranged in a trapezoidal shape, a parallelogram shape, or an S-shape, according to the specific arrangement of the wiring, so that the space utilization of the first bonding-lead part  10  can be maximized. 
     Fourth Embodiment 
     Referring to  FIG.  7   , the width of the first bonding-lead part  10  is adjusted to be less than the width of the second bonding-lead part  20 , where the width of the second bonding-lead part  20  remains unchanged, the width of the first bonding-lead part  10  is thus reduced, which results in shortening of the GOA bonding leads in the first bonding-lead part  10 , thus an increase in the impedance of single GOA bonding lead. In order to compensate for the increased impedance caused by the length reduction of the GOA bonding lead, in this embodiment, the first bonding-lead part  10  includes a plurality of GOA bonding lead groups  11 , and each GOA bonding lead group  11  includes at least two GOA bonding leads. That is, each GOA bonding lead group  11  corresponds to the previously mentioned single GOA bonding lead, except that each GOA bonding lead group  11  includes at least two GOA bonding leads, replacing the single lead with multiple leads. Therefore, the overall cross-sectional area is increased and the impedance can be reduced, thus compensating for the increased impedance due to length reduction. 
     Furthermore, the number of GOA bonding leads included in each GOA bonding lead group  11  may be two, three, four, and the like, and the number may be adjusted according to the specific impedance to be compensated. In another embodiment, the GOA bonding lead group  11  may not be provided, instead, a single GOA bonding lead is provided, corresponding to the previously mentioned single GOA bonding lead. The present embodiment differs from the previous embodiments in that a thickened GOA bonding lead, which is individually manufactured and thicker than the conventional GOA bonding leads, is used, which increases the overall cross-sectional area and reduces the impedance, thereby compensating for the increased impedance due to the reduced length. 
     In order to compensate for the increased impedance due to the reduced length of the GOA bonding lead, the first bonding-lead part  10  includes a plurality of GOA bonding lead groups  11 , and each GOA bonding lead group  11  includes at least two GOA bonding leads, replacing the single lead with multiple leads. However, the length of the first bonding-lead part  10  thereby increasing. In order to provide space for the bonding-lead part  10  that is increased in length within a limited space, in this embodiment, an avoidance space  21  is provided at an end of the second bonding-lead part  20  near the first bonding-lead part  10 . By reducing the number of leads in the second bonding-lead part  20  to form the avoidance space  21 , sufficient space is provided for the first bonding-lead part  10  that is increased in length. 
     In a specific embodiment, the number of GOA bonding leads included in each GOA bonding lead group  11  may be two or three, and the number may be adjusted according to the specific impedance to be compensated. For an easier manufacture and aiding in the adjustment to the number of leads in the second bonding-lead part  20 , the width of the first bonding-lead part  10  is ½ or ⅓ of the width of the second bonding-lead part  20  in this embodiment. 
     Fifth Embodiment 
     Referring to  FIG.  10   , according to another aspect of the present application, a display panel is provided, the display panel includes an array substrate  3 , a liquid crystal layer  5  and a color film substrate  4 . The array substrate  3  and the color film substrate  4  are disposed facing each other, and the liquid crystal layer  5  is located between the array substrate  3  and the color film substrate  4 , and the array substrate  3  is the above-mentioned array substrate. 
     In summary, the array substrate provided by the embodiments of the present application at least has the following advantageous effects: 
     in the array substrate of the present application, a wiring area is formed on the first side of the first bonding-lead part, or on the second side of the first bonding-lead part, or on both sides of the first bonding-lead part by changing the width of the first bonding-lead part, so as to provide sufficient wiring space for GOA unit test wiring and GOA signal wiring, which can prevent the GOA unit test wiring and the GOA signal wiring from being too thin, and thus ensure that the impedance is kept within a certain range. Especially for products with narrow bezel, normal wiring and operation of the GOA unit test wiring and the GOA signal wiring can be ensured while controlling the bezel size of the product. 
     The above are merely optional embodiments of the present application, and are not intended to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall fall within the scope of protection of the present application.