Patent Publication Number: US-2020288005-A1

Title: Display Assembly and Terminal

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a continuation of International Application No. PCT/CN2018/114959, filed on Nov. 12, 2018, which claims priority to Chinese Patent Application Nos. 201711322950.6, and 201721743614.4, both filed on Dec. 12, 2017, the disclosures of all of which are hereby incorporated by reference in their entireties. 
    
    
     TECHNICAL FIELD 
     This disclosure relates to the technical field of terminals. 
     BACKGROUND 
     Generally, a terminal includes a cover plate and a screen, and the cover plate is arranged on the screen. During assembling of the cover plate and the screen, it is difficult to realize alignment between the screen and the cover plate. 
     SUMMARY 
     Implementations aim to provide a display assembly and a terminal. 
     A display assembly is provided. The display assembly is configured to be coupled with a rear casing of a terminal. The display assembly includes a screen and a cover plate. The cover plate is arranged on the screen and includes a main body portion and an edge portion. The edge portion is disposed on an edge of the main body portion and coupled with the main body portion. The main body portion has a first surface facing the rear casing and a second surface away from the rear casing, and the edge portion is bent toward the first surface and above the first surface. The edge portion and the first surface define a receiving groove, the screen is at least partially received in the receiving groove, and the edge portion is configured to be coupled with the rear casing. One side of the main body portion facing the screen defines a countersink, the first surface is a bottom wall of the countersink, and the screen is at least partially received in the countersink. An orthographic projection of the screen on a main plane coincides with an orthographic projection of the countersink on the main plane, and the main plane is a plane perpendicular to a thickness direction of the terminal. 
     A terminal is provided. The terminal includes a screen, a cover plate arranged on the screen, and a rear casing. The cover plate includes a main body portion and an edge portion. The edge portion is disposed on an edge of the main body portion and coupled with the main body portion. The main body portion has a first surface and a second surface, and the edge portion is bent toward the first surface and above the first surface. The edge portion and the first surface define a receiving groove, and the screen is at least partially received in the receiving groove. One side of the main body portion facing the screen defines a countersink, the first surface is a bottom wall of the countersink, and the screen is at least partially received in the countersink. An orthographic projection of the screen on a main plane coincides with an orthographic projection of the countersink on the main plane, and the main plane is a plane perpendicular to a thickness direction of the terminal. The rear casing is coupled with the edge portion, where the screen is disposed between the rear casing and the cover plate. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to describe technical solutions of implementations or the related art more clearly, the following will give a brief description of accompanying drawings used for describing the implementations or the related art. Apparently, the accompanying drawings described below merely illustrate some implementations. Those of ordinary skill in the art can also obtain other accompanying drawings based on the accompanying drawings described below without creative efforts. 
         FIG. 1  is a perspective view of a terminal according to implementations. 
         FIG. 2  is a front view of the terminal in  FIG. 1 . 
         FIG. 3  is a cross-sectional view of the terminal illustrated in  FIG. 2  according to implementations, taken along line A-A. 
         FIG. 4  is an enlarged view of part B of the terminal in  FIG. 3 . 
         FIG. 5  is a cross-sectional view of the terminal illustrated in  FIG. 2  according to other implementations, taken along line A-A. 
         FIG. 6  is an enlarged view of part C of the terminal in  FIG. 5 . 
     
    
    
     DETAILED DESCRIPTION 
     In order to enable those skilled in the art to better understand solutions, technical solutions embodied in implementations will be described in a clear and comprehensive manner in conjunction with the accompanying drawings. The accompanying drawings described below merely illustrate some implementations. However, the disclosure can be implemented in many different forms and is not limited to the implementations described herein. Instead, these implementations are provided to better understand the disclosure. 
     “Terminal device” used herein includes, but is not limited to, a device configured to be coupled with other devices via any one or more of the connection modes described in the following and configured to receive and/or transmit communication signals. The connection modes include: (1) coupling via wired circuit connection such as a public switched telephone network (PSTN), a digital subscriber line (DSL), a digital cable, or direct cable connection; (2) coupling via a wireless interface such as a cellular network, a wireless local area network (WLAN), a digital television network such as a digital video broadcasting-H (DVB-H) network, a satellite network, or an amplitude modulation-frequency modulation (AM-FM) broad transmitter. 
     The terminal device configured to communicate with other devices via a wireless interface may be referred to as a “terminal”. Examples of the terminal include, but are not limited to, the following electronic devices: (1) a satellite phone or a cellular phone; (2) a personal communications system (PCS) terminal that has cellular radiotelephone and data processing, fax, and data communication capabilities; (3) a radiotelephone, a pager, Internet/Intranet access, a web browser, a notepad, a calendar, a personal digital assistant (PDA) equipped with a Global Positioning System (GPS) receiver; (4) a conventional laptop and/or palm-type receiver; (5) a conventional laptop and/or palm-type radiotelephone transceiver, or the like. 
     Referring to  FIG. 1  and  FIG. 2 , in at least one implementation, a terminal  10  is a smart phone. The terminal  10  includes a rear casing  100  and a display assembly  200 . The rear casing  100  covers one side of the display assembly  200  and is coupled with the display assembly  200 . The rear casing  100  can support and protect the display assembly  200 . In at least one implementation, the rear casing  100  is substantially rounded rectangular. The rear casing  100  is convex toward a direction away from the display assembly  200 . A receiving space is defined between the rear casing  100  and the display assembly  200 , such that a battery, a main board, and other components of the terminal  10  can be received in the receiving space. As illustrated in FIG.  3  and  FIG. 4 , in at least one implementation, the rear casing  100  includes a middle frame  110  and a battery cover  120  (i.e., a cover covering the battery of the terminal  10 ). The display assembly  200  and the battery cover  120  are respectively coupled with the middle frame  110 , and the middle frame  110  is disposed between the display assembly  200  and the battery cover  120 . 
     In one example, the middle frame  110  has a substantially rectangular frame shape. The middle frame  110  is on the periphery of the display assembly  200 . An inner side of the middle frame  110  may be provided with a support structure. As one example, the middle frame  110  is made from a metal material, such as an aluminum alloy. A complex support structure can be formed on the middle frame  110  through an injection molding process. The battery, the main board, and other components of the terminal  10  can be secured to the support structure. As another example, the middle frame  110  is made from other materials such as stainless steel or ceramic. In at least one implementation, the battery cover  120  is made of glass. The glass may be colored or colorless, or the glass may be transparent or non-transparent. In at least one implementation, a difference A E between a color value of an outer surface of the middle frame  110  and a color value of an outer surface of the battery cover  120  is larger than 2.5. When the difference A E between the color value of the outer surface of the middle frame  110  and the color value of the outer surface of the battery cover  120  is larger than 2.5, the outer surface of the middle frame  110  and the outer surface of the battery cover  120  may have a significant color difference visually, and thus the appearance of the terminal  10  may be beautified. As illustrated in  FIG. 5  and  FIG. 6 , in at least one implementation, the battery cover  120  and the middle frame  110  are integrally formed. The battery cover  120  and the middle frame  110  are generally made from aluminum alloy, stainless steel, ceramic, or glass. With such structural design, it is beneficial for processing and molding of the rear casing  100 , and the appearance of the terminal  10  may be simple and unified. 
     As illustrated in  FIG. 3  and  FIG. 4 , in at least one implementation, the display assembly  200  includes a screen  210  and a cover plate  220 . The screen  210  is disposed on one side of the cover plate  220  facing the rear casing  100 . The cover plate  220  is arranged on the screen  210  and is coupled with the rear casing  100 . The screen  210  can display information and provide an interactive interface for a user. In at least one implementation, the cover plate  220  includes a main body portion  221  and at least one edge portion  223 . The edge portion  223  is disposed on an edge of the main body portion  221  and coupled with the main body portion  221 . In at least one implementation, the main body portion  221  and the edge portion  223  are made of glass and are integrally formed. In addition, the main body portion  221  and the edge portion  223  have high light transmittance. In one example, the main body portion  221  has a substantially rectangular block shape. The at least one edge portion  223  is arranged on two sides in a width direction of the rectangle (i.e., main body portion  221 ), that is, the at least one edge portion  223  is coupled between two long edges of the rectangle. In at least one implementation, the main body portion  221  has a first surface  2211  facing the rear casing  100  and a second surface  2213  away from the rear casing  100 . The edge portion  223  is bent toward the first surface  2211  and above the first surface  2211 . The edge portion  223  and the first surface  2211  define a receiving groove  300 . The screen  210  is at least partially received in the receiving groove  300 . The screen  210  is attached to the first surface  2211 , and the edge portion  223  is coupled with the middle frame  110 . 
     As illustrated in  FIG. 4 , in at least one implementation, one side of the main body portion  221  facing the screen  210  defines a countersink  2215 . The first surface  2211  is a bottom wall of the countersink  2215 , and the screen  210  is at least partially received in the countersink  2215 . In one example, a shape of the countersink  2215  matches that of the screen  210 , that is, a length of the countersink  2215  is equal to that of the screen  210 , and a width of the countersink  2215  is equal to that of the screen  210 . The screen  210  can be inserted in the countersink  2215 , and the screen  210  may be attached to the bottom wall of the countersink  2215 . Further, a plane perpendicular to a thickness direction of the terminal  10  is set as a main plane, and an orthographic projection of the screen  210  on the main plane coincides with an orthographic projection of the countersink  2215  on the main plane. With such structural design, it is possible to achieve a high precision coupling between the screen  210  and the countersink  2215 . In addition, the screen  210  is inserted in the countersink  2215 , which facilities the coupling and alignment between the screen  210  and the cover plate  220 , thereby improving the accuracy and efficiency of the coupling of the screen  210  and the cover plate  220 . 
     It will be appreciated that, a dispensing layer (not shown) may be provided between the screen  210  and the bottom wall of the countersink  2215 . The dispensing layer is disposed on the periphery of the screen  210 , for example, the dispensing layer is disposed on a non-display region of the screen  210 . The screen  210  can be firmly attached to the cover plate  220  via the dispensing layer. In addition, the width of the countersink  2215  may be slightly larger than that of the screen  210 , and correspondingly, the length of the countersink  2215  may be slightly larger than that of the screen  210 . For instance, a ratio of a difference value between the width of the countersink  2215  and the width of the screen  210  to the width of the screen  210  can be smaller than 2%, and a ratio of a difference value between the length of the countersink  2215  and the length of the screen  210  to the length of the screen  210  can be smaller than 2%. Even such machining error exists, the orthographic projection of the screen  210  on the main plane can be deemed to coincide with that of the countersink  2215  on the main plane, and the countersink  2215  can also be considered to meet the requirements of the machining, thereby improving the alignment between the screen  210  and the cover plate  220 . 
     In at least one implementation, the first surface  2211  is a plane. The screen  210  is a rigid screen. The rigid screen is not easy to be bent. The screen  210  is attached to the first surface  2211 . Since the first surface  2211  of the main body portion  221  is a plane, there is no need to adopt a high cost flexible screen for the terminal  10 . A good appearance can be obtained and the cost of the terminal  10  may be reduced when the terminal  10  is provided with a relatively low cost rigid screen, such as a liquid crystal display (LCD). Since the first surface  2211  attached to the screen  210  is a plane, it is possible to avoid a bent stress on a surface of the screen  210  attached to the cover plate  220 , and therefore the screen  210  can be firmly attached to the cover plate  220 . In addition, it is further possible to avoid that the screen  210  is unfirmly attached to the cover plate  220  due to the bent stress on the surface of the flexible screen if the flexible screen is bent to be fitted on the cover plate  220 . 
     As illustrated in  FIG. 4 , as one example, the second surface  2213  is a plane, and the second surface  2213  is parallel to the first surface  2211 . As another example, the second surface  2213  is a curved surface, such as an arc-shaped surface. The terminal  10  may have a curved surface display effect and the appearance of the terminal  10  can be enhanced under a condition that the second surface  2213  is designed as an arc-shaped surface. In one example, by setting a plane perpendicular to a length direction of the terminal  10 , a shape of the edge portion  223  bent toward the screen  210  is substantially arc-shaped, that is, a surface of the edge portion  223  facing an interior of the terminal  10  and a surface of the edge portion  223  facing an exterior of the terminal  10  are both arc-shaped surfaces. When the at least one edge portion  223  is arranged on the side edges of the screen  210  and is coupled with the middle frame  110  of the rear casing  100 , the terminal  10  can have a good appearance. On the other hand, since with the curved edge portion  223  lights can be refracted and reflected, the middle frame  110  may be narrow visually, and the non-display region on the periphery of the screen  210  may also have a narrow black-edge visually. 
     In at least one implementation, a ratio of a width of an orthographic projection of the edge portion  223  on the main plane to a width of the orthographic projection of the screen  210  on the main plane is smaller than 0.03, and a ratio of a maximum distance between the edge portion  223  and the second surface  2213  to a maximum thickness of the main body portion  221  is smaller than 6. As illustrated in  FIG. 3 , the second surface  2213  of the cover plate  220  is a plane, the second surface  2213  can be regarded as the main plane, and the ratio of the width of the orthographic projection of the edge portion  223  on the second surface  2213  to the width of the orthographic projection of the screen  210  on the second surface  2213  is smaller than 0.03. For instance, as illustrated in  FIG. 3 , the width of the orthographic projection of the screen  210  on the second surface  2213  is D, the width of the orthographic projection of the edge portion  223  on the second surface  2213  is d, and d/D&lt;0.03. Furthermore, in  FIG. 3 , the maximum distance between the edge portion  223  and the second surface  2213  is H, the maximum thickness of the main body portion  221  is h, and H/h&lt;6. With such configuration, the edge portion  223  has a large curvature, and a gap between an inner surface of the edge portion  223  and a side surface of the screen  210  facing the edge portion  223  is narrow. As such, the middle frame  110  may be narrow visually, and the non-display region on the periphery of the screen  210  may also has a narrow black-edge visually. 
     As one example, the edge portion  223  curved toward the screen  210  is obtained through a hot-press molding. As another example, the edge portion  223  curved toward the screen  210  is obtained through a computer numerical control (CNC) process. In one example, the gap between the inner surface of the edge portion  223  and the side surface of the screen  210  facing the edge portion  223  may be provided with an adhesive layer (not shown), where the adhesive layer may be formed by transparent glue. The screen  210  can be firmly attached to the cover plate  220  via the adhesive layer. In at least one implementation, the orthographic projection of the screen  210  on the main plane is within that of the second surface  2213  on the main plane. In the above design, the second surface  2213  fully covers the screen  210 . When the screen  210  displays information, with structural consistency of the second surface  2213 , a consistent display effect can be presented when lights from the screen  210  passes through the second surface  2213 , and discontinuous display on a joint between the main body portion  221  and the edge portion  223  due to different curvatures can be avoided, and thus user experience is not affected. 
     In the terminal  10  and the display assembly  200 , the cover plate  220  of the display assembly  200  includes the main body portion  221  and the edge portion  223 . The edge portion  223  is bent toward the rear casing  100  and is coupled with the rear casing  100 . The screen  210  is attached to the first surface  2211  of the main body portion  221 . The edge portion  223  is bent toward the rear casing  100  and above the first surface  2211 , such that the receiving groove  300  is defined, where the receiving groove  300  provides a space for accommodating the screen  210 . As such, the size of the rear casing  100  in the thickness direction of the terminal  10  may be reduced, and therefore the terminal  10  may be simple. In addition, the side of the main body portion  221  facing the screen  210  defines the countersink  2215 , and the screen  210  can be inserted in the countersink  2215 , which facilitates the coupling and alignment between the screen  210  and the cover plate  220 , so as to improve the accuracy and efficiency of the coupling of the screen  210  and the cover plate  220 . 
     As illustrated in  FIG. 5  and  FIG. 6 , in at least one implementation, the middle frame  110  includes a body  111  and a first lug  113  integrally formed with the body  111 . One side of the screen  210  away from the cover plate  220  abuts against the first lug  113 . In one example, a width of the first lug  113  is equivalent to that of the screen  210 . The screen  210  is disposed on the first lug  113 , and an adhesive layer (not shown) is provided between the screen  210  and the first lug  113  to enable that the screen  210  is coupled with the middle frame  110 . The first lug  113  facilitates the positioning of the screen  210  on the middle frame  110  and the coupling between the screen  210  and the middle frame  110 . As one example, the first lug  113  is continuous on the body  111 , the first lug  113  is on the periphery of the screen  210 , and an orthographic projection of the first lug  113  on the main plane is rounded rectangular. When the first lug  113  and the screen  210  are provided with the adhesive layer disposed there-between, it is beneficial to the firmly coupling of the screen  210  and the middle frame  110 , such that the screen  210  and the middle frame  110  are attached seamlessly, thereby improving the waterproof performance of the terminal  10 . As another example, there are multiple first lugs  113  discontinuously arranged on the body  111 , that is, the first lugs  113  can be spaced apart from each other. In this case, the first lugs  113  may also be conducive to the coupling of the screen  210  and the middle frame  110 . 
     In at least one implementation, the middle frame  110  further includes a second lug  115 . The second lug  115  is integrally formed with the body  111 . The second lug  115  has an abutting surface  116 . The abutting surface  116  is a plane, and an angle defined between the abutting surface  116  and the main plane is smaller than 45 degrees. The edge portion  223  abuts on the abutting surface  116 . As illustrated in  FIG. 6 , the second lug  115  extends from the first lug  133  and is close to the cover plate  220 , and the abutting surface  116  is inclined from the exterior to the interior of the terminal  10 . In  FIG. 6 , the terminal  10  is placed horizontally, the abutting surface  116  on the left after being subjected to clockwise rotation with an angle less than 45 degrees can be overlapped with a horizontal plane, and the abutting surfaces  116  on the right after being subjected to anticlockwise rotation with an angle less than 45 degrees can be overlapped with the horizontal plane. In one example, an adhesive layer is provided on the abutting surface  116 . The edge portion  223  can be coupled with the middle frame  110  via the adhesive layer. With the above configuration, when the cover plate  220  is coupled with the middle frame  110 , a supporting force of the abutting surface  116  to the cover plate  220  has a component force distributed along a width direction of the cover plate  220 , where the component force points to the interior of the terminal  10 . The component force enables the at least one edge portion  223  on the two sides of the main body portion  221  to be approached inwardly, so that the at least one edge portion  223  on the two sides of the main body portion  221  can be prevented from being stretched outwardly, thereby ensuring the reliability of the coupling of the cover plate  220  and the middle frame  110 . 
     As one example, the second lug  115  is continuous on the body  111 , the second lug  115  is on the periphery of the first lug  113 , and an orthographic projection of the second lug  115  on the main plane is rounded rectangular. When the second lug  115  and the cover plate  220  are provided with an adhesive layer disposed there-between, it is beneficial to the firmly coupling of the cover plate  220  and the middle frame  110 , such that the cover plate  220  and the middle frame  110  are attached seamlessly, thereby improving the waterproof performance of the terminal  10 . As another example, there are multiple second lugs  115  discontinuously arranged on the body  111 , that is, the second lugs  115  may be spaced apart from each other. In this case, the second lugs  115  may also be conducive to the coupling of the cover plate  220  and the middle frame  110 . 
     In at least one implementation, the middle frame  110  further includes a third lug  117 . The third lug  117  is integrally formed with the body  111 . The third lug  117  is arranged on one side of the edge portion  223  away from the screen  210 , and the edge portion  223  abuts against the third lug  117 . In  FIG. 6 , the third lug  117  extends from the second lug  115  and is close to the second surface  2213 . The third lug  117  abuts against the edge portion  223  and forms a half-wrapped structure to an edge of the edge portion  223 , which can facilitate the positioning of the cover plate  220  on the rear casing  100  and have a protection effect on the cover plate  220 , thereby preventing the edge of the cover plate  220  from being damaged by accidental collision. As one example, the third lug  117  is continuous on the body  111 , the third lug  117  is on the periphery of the second lug  115 , and an orthographic projection of the third lug  117  on the main plane is rounded rectangular. The third lug  117  is beneficial to the firmly coupling of the cover plate  220  and the middle frame  110 . As another example, there are multiple third lugs  117  discontinuously arranged on the body  111 , that is, the third lugs  117  may be spaced apart from each other. In this case, the third lugs  117  can also be conducive to the coupling of the cover plate  220  and the middle frame  110 . In addition, an outer side of the middle frame  110  extending along the thickness direction of the terminal  10  is an arc-shaped surface, and curvature of the arc-shaped surface is slightly larger than that of the edge portion  223 , such that side surfaces of the terminal  10  may be curved surfaces, which is beneficial to beautifying the terminal  10  and enhancing the structural integrity of the terminal  10 . 
     The technical features of the above-described implementations may be arbitrarily combined. For the sake of brevity of description, not every combination of the technical features in the above implementations is described. However, as long as there is no contradiction of the combinations between the technical features, which shall fall within the protection scope. 
     The above-mentioned implementations merely some implementations. The specific and detailed illustration of the above implementations shall not be construed as limiting the scope of the claims. It should be noted that for a person skilled in the art, a number of variations and modifications may be obtained without departing from the spirit and scope. Therefore, the scope should be determined by the appended claims.