Patent Publication Number: US-2007115269-A1

Title: Display window assembly and portable electronic device case including display window assembly

Description:
BACKGROUND OF THE INVENTION  
      1. Field of the Invention  
      The present invention relates to display window assemblies and portable electronic device cases including such display window assemblies. More particularly, the invention relates to display window assemblies and portable electronic device cases, e.g., mobile phone cases, including such display window assemblies, which may be relatively thinner than known display window assemblies, be easily assembled and have sufficient adhesion and/or connection space, and to portable electronic devices employing such cases enabling a relatively higher production yield, improved impact resistance.  
      2. Discussion of Related Art  
      Various electronic devices, including portable communication devices, e.g., cellular phones, PDAs, may include a display, e.g., liquid crystal display (LCD) for displaying images.  
      Such electronic devices may include a case in which the display may be housed and isolated from the outside. To enable viewing of images on the display, e.g., LCD, the case may include a window assembly portion, and the display may be arranged behind the window in the window assembly portion of the display.  
       FIG. 1  illustrates a general perspective view of a mobile phone, and  FIG. 2  illustrates a cross-sectional view of the window assembly portion of the mobile phone illustrated in  FIG. 1 .  
      As illustrated in  FIG. 1 , a mobile phone  1  may generally include a display portion  100  for displaying and/or entering information, e.g., images, an input portion  200  for inputting information, e.g., display signals to the display portion  100 , communication signals, etc., a window  130  for viewing the display, a case  110  for supporting components of the display portion  100 , and a control unit (not shown) for controlling the information, e.g., input to the input unit  200 , the display signals of the display portion  100  and communication signals, etc.  
      As illustrated in  FIG. 2 , the display portion  100  of the mobile phone  1  may include the case  110 , the window  130 , a display device  150  arranged inside the case  110 , and a backlight unit  170  (so-called “BLU”) arranged behind the display device  150 . The BLU  170  may be secured to the case  110 , e.g., using a tape  190 .  
      The case  110  may be a member corresponding to a general outer structure and/or appearance of the mobile phone  1 . The case  110  may include a predetermined opening exposing at least a portion of the window  130  and the display device  150  to allow images displayed on the display device  150  to be viewed from outside of the case  110 . The case  110  may include a protruding portion  112  on which the window  130  may be arranged. The protruding portion  112  may protrude inward along edges of the predetermined opening. The window  130  may be arranged on the protruding portion  112  of the case  110 , and may be designed to protect a display device  150 , arranged inside of the case  110 , from environmental factors.  
      The display device  150  may display information, e.g., signals for operating the mobile phone  1 . For example, when a call is received, the display device  150  may signal a change in the color being displayed or may display an image to inform the user of the received call.  
      Although not illustrated in  FIG. 1 , the case  110  may have opposing sides, and the BLU  170  may be arranged between opposing sides of the case  110 . As illustrated in  FIG. 2 , the BLU  170  may receive the display device  150 . When the BLU  170 , with the display device  150 , is attached to the case  110 , a portion of the display device  150  may be sandwiched between the protruding portions  112  of the case  110  and the BLU  170 .  
      The protruding portions  112  may be sandwiched between the window  130  and the display device  150 . A gap g 1  may exist between the window  130  and the display device  150 . The gap g 1  is a significant factor in a thickness t 1  of the display portion  100  of the mobile phone  1 .  
      The demand for smaller and thinner portable communication devices is increasing. For example, in the mobile phone  1  described above, such a demand may be satisfied by reducing the gap g 1  between the window  120  and the display device  150 , and reducing a thickness of the mobile phone  1 .  
      However, simply reducing the gap g 1  of the mobile phone  1  does not come without tradeoffs. As the sizes of portable electronic devices have already decreased, such tradeoffs may complicate fabrication processes, reduce yield, reduce impact resistance, increase cost, etc. For example, in the case of mobile phone  1  described above, a reduction in the gap g 1  reduces an impact resistance of the mobile phone  1  against, e.g., externally applied impacts. Reducing the gap g 1  may also complicate the fabrication process because the protruding portions  112  may be eliminated and the BLU  170  may directly contact the inside of the case  110 , which may complicate securing of the display device  150  to the case  110 . Further, if the display device  150  is not sufficiently secured and/or process(es) for assembling the display portion  100  become complicated, production yield of the mobile phone  1  may be reduced.  
     SUMMARY OF THE INVENTION  
      The present invention is therefore directed to display window assemblies and portable electronic device cases including display window assemblies that substantially overcome one or more of the problems due to the limitations and disadvantages of the related art.  
      At least one of the above and other features and advantages of the present invention may be realized by providing a display window assembly capable of reducing the manufacturing cost of a display portion of an electronic device.  
      At least one of the above and other features and advantages of the present invention may be separately realized by providing a display window assembly capable of simplifying assembly of a display portion of an electronic device.  
      At least one of the above and other features and advantages of the present invention may be separately realized by providing a display window assembly capable of reducing a thickness of a display portion of an electronic device.  
      At least one of the above and other features and advantages of the present invention may be realized by providing a display window assembly including a case having an outer surface opposing an inner surface and including at least one engaging portion and a predetermined opening, the predetermined opening being at least partially defined by the opposing surfaces of the case and the at least one engaging portion protruding from at least one of the opposing surfaces of the case, a transparent member having a first surface opposing a second surface, and at least one of the first surface and the second surface of the transparent member contacting the engaging portion, a display device including a first surface opposing a second surface, a connecting mechanism between the second surface of the transparent member and the first surface of the display device, and a backlight unit (BLU) arranged on the second surface of the display device to project light to the display device.  
      At least the first surface of the display device and the second surface of the transparent member may have a substantially same size and shape. The BLU may define a space having a size and shape substantially corresponding to the size and shape of the second surface of the transparent member. The connecting mechanism may be arranged at outer edge portions of the first surface of the display device and the second surface of the transparent member, and the connecting mechanism may be completely overlapped by the first surface of the display device and the second surface of the transparent member. The connecting mechanism may be arranged between facing surfaces of the case and the BLU and between the outer edge portions of the first surface of the display device and the second surface of the transparent member, the connecting mechanism may be in direct contact with the second surface of the transparent member, the case, the BLU and the first surface of the display device. The engaging portion may have a first surface that is aligned with an outer surface of the case and a second surface that faces at least a portion of the first surface of the transparent member, the first surface of the engaging portion being opposed to the second surface of the engaging portion. The first surface of the transparent member may have a first portion and a second portion, the first portion being aligned with the outer surface of the case and the second portion being overlapped by the second surface of the engaging portion.  
      The engaging portion may have a first surface that faces at least a portion of the second surface of the transparent member and a second surface opposing the first surface, wherein the first surface of the transparent member may be substantially parallel with an outer surface of the case. The BLU may include side-wall portions and an inner-wall portion, the display device being sandwiched between the inner-wall portion of the BLU and the transparent member, and the side-wall portions may extend substantially a distance corresponding to a thickness of the display device along a y-direction, substantially perpendicular to a plane along which the inner-wall portion extends. The side-wall portions may extend a distance greater than the thickness of the display device. The transparent member may be made of a material that can transmit light having a wavelength greater than a wavelength of visible light. The display device may be a liquid crystal display (LCD). The transparent member may have at least one protruding portion. The at least one protruding portion of the transparent member and the at least one engaging portion of the case may overlap one another. The transparent member and the display device may have a substantially rectangular shape. The engaging portion may include a plurality of projecting portions. The connecting mechanism may have a substantially rectangular ring-like shape. The connecting mechanism may be an adhesive tape. A distance between the second surface of the transparent member and the first surface of the display device corresponds to a thickness of the connecting mechanism.  
      At least one of the above and other features and advantages of the present invention may be realized by providing a mobile phone including a case including an outer surface opposing an inner surface, at least one engaging portion and a predetermined opening, the predetermined opening being at least partially defined by the opposing surfaces of the case and the at least one engaging portion protruding from at least one of the opposing surfaces of the case, a transparent member having a first surface opposing a second surface, and at least one of the first surface and the second surface of the transparent member contacting the engaging portion, a display device including a first surface opposing a second surface, a connecting mechanism between the second surface of the transparent member and the first surface of the display device, a backlight unit (BLU) arranged on the second surface of the display device to project light to the display device, an input portion for inputting information to the display device, and a control unit for controlling the input information. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
      The above and other features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing in detail exemplary embodiments thereof with reference to the attached drawings, in which:  
       FIG. 1  illustrates a perspective view of a mobile phone;  
       FIG. 2  illustrates a cross-sectional view of a display window assembly portion taken along line I-I in the mobile phone illustrated in  FIG. 1 ;  
       FIG. 3  illustrates a perspective view of an exemplary portable electronic device including an embodiment of a display window assembly according to the present invention;  
       FIG. 4A  illustrates a cross-sectional view of a first exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as the mobile phone illustrated in  FIG. 3 ;  
       FIG. 4B  illustrates a cross-sectional view of a second exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as the mobile phone illustrated in  FIG. 3 ;  
       FIG. 4C  illustrates a top plan view of a first exemplary embodiment of an engaging portion of the present invention;  
       FIG. 4D  illustrates a top plan view of a second exemplary embodiment of an engaging portion of the present invention;  
       FIG. 5A  illustrates a top plan view of a first exemplary embodiment of a connecting mechanism employable with a display window assembly of the present invention;  
       FIG. 5B  illustrates a top plan view of a second exemplary embodiment of a connecting mechanism employable with a display window assembly of the present invention;  
       FIG. 6A  illustrates a cross-sectional view of a third exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as a mobile phone, illustrated in  FIG. 3 ;  
       FIG. 6B  illustrates a cross-sectional view of a fourth exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as a mobile phone, illustrated in  FIG. 3 ;  
       FIG. 6C  illustrates a cross-sectional view of a fifth exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as a mobile phone, illustrated in  FIG. 3 ;  
       FIG. 6D  illustrates a cross-sectional view of a sixth exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as a mobile phone, illustrated in  FIG. 3 ;  
       FIG. 7A  illustrates a cross-sectional view of an alternate embodiment of the display window assembly illustrated in  FIG. 4A , with a third exemplary embodiment of a connecting mechanism;  
       FIG. 7B  illustrates a cross-sectional view of an alternate embodiment of the display window assembly illustrated in  FIG. 6A , with the third exemplary embodiment of the connecting mechanism; and  
       FIG. 7C  illustrates a cross-sectional view of an alternate embodiment of the display window assembly illustrated in  FIG. 6C , with the third exemplary embodiment of the connecting mechanism. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION  
      Korean Patent Application No. 2005-112590, filed on Nov. 23, 2005, in the Korean Intellectual Property Office, and entitled: “Display Diode with Window Assembly and the Mobile Phone Having It,” is incorporated by reference herein in its entirety.  
      The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. The invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the figures, the dimensions of layers and regions are exaggerated for clarity of illustration. It will also be understood that when a layer is referred to as being “on” another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may also be present. Further, it will be understood that when an element, is referred to as being “under” another element, it can be directly under the other element, and one or more intervening element(s) may also be present. In addition, it will also be understood that when an element is referred to as being “between” two elements it can be the only layer between the two elements, or one or more intervening elements may also be present. Like reference numerals refer to like elements throughout.  
      In the following description of exemplary embodiments of one or more aspects of the invention, a mobile phone may be used as an exemplary portable communication device. Aspects of the invention are not, however, limited to mobile phones.  
       FIG. 3  illustrates an external perspective view of an exemplary portable electronic device including an embodiment of a display window assembly according to one or more aspects of the invention.  FIGS. 4A and 4B  illustrate cross-sectional views of a first and a second exemplary embodiment of a display window assembly taken along line II-II in a portable electronic device, such as the mobile phone illustrated in  FIG. 3 .  
      As illustrated in  FIG. 3 , the mobile phone  3  may include a display window assembly  300 , an input unit  400  for inputting information and/or display signals to the mobile phone  3 , and a control unit (not shown) for controlling, e.g., the input information and/or display signals.  
      Referring to  FIG. 4A , the display window assembly  300  may include a gap g 3  between a window  330  and a display device  350 . An input unit  400  may be, e.g., a known input unit  400 , and may include a keypad for manual entry of information by users, a sound-recognition unit, a receiving unit for communication signals, an incident light-recognition unit for a camera attached to the phone  3 , and other members for generating input signals in general.  
      Also, a conventional control unit may be included in the phone  3  so that it can control the input signals of the input unit  400  and signals of the display device  350 .  
      The phone  3  may have a shape, as illustrated in  FIG. 3 , and may have a shape corresponding to a shape of the display window assembly  300 . A thickness t 3  of the display window assembly  300  of the mobile phone  3  may be thinner than the thickness t 1  of known phones  1  at least because of a reduced gap, e.g., reduced gap g 3  between the window  330  and the display device  350  in the display window assembly  300 .  
      As illustrated in  FIG. 4A , a portable electronic device case  310  may include a portion corresponding to a display window assembly  300 . The display window assembly  300  may include a predetermined opening  302 , engaging portion(s)  312 , a window  330 , i.e., a transparent member, a display device  350 , a backlight unit (BLU)  370  and a connecting mechanism  390 .  
      The predetermined opening  302  may expose at least a portion of the window  330  and the display device  350 , which may be arranged in the display window assembly portion  300  of the case  310 . Images displayed on the display device  350  may be displayed via the predetermined opening  302  and the window  330 .  
      One or more engaging portion(s)  312 , e.g., protruding portion(s), may be provided to secure the window  330  to the case  310 . The engaging portion(s)  312  may respectively project from surfaces  311   a ,  311   b  of the case  310 . In the embodiments illustrated in  FIGS. 4A and 4B , the engaging portion  312  may have an outer surface  312   a , and the outer surface  312   a  may continuously extend from an outer surface  314  of the case  310 . Respective facing surfaces  312   c  of engaging portions  312  may, e.g., face each other, as illustrated in  FIG. 4A . In the exemplary embodiments illustrated in  FIGS. 4A and 4B , the facing surfaces  312   c  extend substantially perpendicular to a plane along which the window  330  extends. The facing surfaces  312   c  may, however, extend, e.g., at a diagonal towards the window.  
      In the exemplary embodiments illustrated in  FIGS. 4A and 4B , the surfaces  311   a ,  311   b  extend substantially perpendicular to the plane along which the window  330  extends. The surfaces  311   a ,  311   b  may, however, extend, e.g., at a diagonal towards the window  330 . In embodiments of the invention, an outer surface  312   a  of the engaging portion(s) may form a stepped structure relative to the outer surface  314  of the case  310 , as illustrated in, e.g.,  FIGS. 4A and 4B .  
      As illustrated in  FIG. 4A , the engaging portions  312  may define a distance D 1  of the predetermined opening  302 . In embodiments of the invention, the surfaces from which the engaging portions  312  may project, may be opposite facing surfaces, e.g.,  311   a ,  311   b , and may define a distance D 2 . The distance D 2  may substantially correspond to a width or length of a portion of the window  330  and/or the display device  350  that may be arranged in the case  310 . In embodiments of the invention, material, e.g., protective or insulating material, may be arranged between the display device  350  and the case  310 , between the window  330  and the case  310 , between the display device  350  and the window  330 , and between the display device  350  and both the window  330  and the case  310 .  
      The connecting mechanism  390  may be, e.g., an adhesive. The window  330  may be arranged to overlap the display device  350  with the connecting mechanism  390  sandwiched therebetween. The connecting mechanism  390  may attach the window  330  to the display device  350 . As illustrated in  FIG. 4A , the connecting mechanism  390  may be provided at outer-side/edge portions of the window  330  and/or the display device  350 . In embodiments of the invention, the connecting mechanism  390  may only be provided at outer-side/edge portions of the window  330  and/or the display device  350  that directly overlap with the engaging portions  312 . In embodiments of the invention, the outer-side/edge portions of the window  330  or the display device  350  may correspond to portions of the window  330  or the display device  350  close to the surfaces  311   a ,  311   b  of the case  310  at least partially defining the predetermined opening  302 . As illustrated in  FIG. 4A , the connecting mechanism  390  may be provided on portions of respective facing surfaces  333 ,  351  of the window  330  and the display device  350 .  
      As illustrated in  FIG. 4A , when the window  330  is arranged in the display window assembly  300  of the case  310 , portions of an outer surface  331  of the window  330  may overlap and/or be engaged by the engaging portions  312  of the case  310 . Inner surface  312   b  of each engaging portion  312  may directly contact a respective portion of the outer surface  331  of the window  330 .  
      The BLU  370  may be arranged adjacent to one or more sides  352 ,  353  of the display device  350 , other than a side of the display device  350  facing the window  330  and/or on which the connecting mechanism  390  is provided. The BLU  370  may directly contact the one or more sides  352 ,  353  of the display device  350 . The BLU  370  may project light to the display device  350 .  
      In embodiments of the invention, the display device  350  and the window  330  may completely or substantially completely occupy a space defined by respective surfaces of the case  310 , the BLU  370 , and the predetermined opening  302 . Sides  372  of the BLU  370  may have surfaces  371  that connect to the case  310  and may at least partially define the space for housing the display device  350  and the window  330 . A distance along a y-direction between the inner surface  312   b  of the engaging portion  312  and an inner surface  373  of the BLU  370  may substantially correspond to a distance along the y-direction of a corresponding portion of the display unit  350 , the window  330  and the gap g 3  or the connecting mechanism  390 .  
      In embodiments of the invention, e.g., exemplary embodiment illustrated in  FIG. 4A , the surface  371  of the sides  372  of the BLU  370  may connect to the inner surface  313  of the case  310 , and the sides  372  may only overlap all or a portion of sides  352 ,  353  of the display device  350  and the connecting mechanism  390 . In embodiments of the invention, e.g., exemplary embodiment illustrated in  FIG. 4B , the surface  371  of the sides  372  of the BLU  370  may directly connect to the inner surface  312   b  of the engaging portions  312 , and the sides  372  of the BLU  370  may overlap all or a portion of the sides  352  of the display device  350 , the connecting mechanism  390  and sides  338 ,  339  of the window  330 . Embodiments of the invention are not, however, limited to such structures for the BLU  370  and the case  310 .  
       FIGS. 4C and 4D  respectively illustrate top plan views of a first exemplary and a second exemplary embodiment of the engaging portion  312 . As illustrated in  FIG. 4C , the engaging portion  312  may be provided entirely along and may define the predetermined opening  302  having, e.g., a generally rectangular shape with flat sides. In embodiments of the invention, the opening  302  is not limited to such a rectangular shape and may be, e.g., circular, elliptical, stepped, etc. As illustrated in  FIG. 4C , when viewing the display window assembly  300  from the top, the sides  338 ,  339  of the window  330  and surfaces  311   a ,  311   b  of the case  310  may be covered by the engaging portion  312 .  
      As illustrated in  FIG. 4D , in embodiments of the invention, the engaging portion  312  may include a plurality of toothed or stepped portions. The engaging portion  312  may define an opening  302 , having, e.g., a generally rectangular shape. For example, two, three, four, etc. engaging portions  312  may be provided and may define toothed surfaces that define the predetermined opening  302 . In embodiments of the invention, pairs of engaging portions  312  may be provided and may be arranged opposite to each other on opposing sides  311   a ,  311   b  of the case  310 . As illustrated in  FIG. 4D , when viewing the display window assembly  300  from the top, the sides  338 ,  339  of the window  330  may substantially align with surfaces  311   a ,  311   b  of the case  310  with the engaging portion  312 , including the plurality of toothed portions, protruding inward.  
      Referring to  FIGS. 4A-4D , in embodiments of the invention, the surfaces  311   a ,  311   b  of the case  310  may include grooves (not shown) for receiving and engaging with portions of the window  330  to secure the window  330  in position. In embodiments of the invention, multiple windows  330  may be provided. For example, one window  330  may be arranged on the outer surface  312   a  of the engaging portion(s)  312  and another window  330  may be arranged below the inner surface  312   b  of the engaging portion(s)  312 . In embodiments in which at the window  330  may be arranged on the outer surface  312   a , when the window  330  is arranged in the case  310 , the outer surface  331  of the window may be arranged to be aligned with the outer surface  314  of the case  310 , as illustrated in  FIGS. 6A-6D  and described below.  
      The window  330  may be made of materials capable of transmitting light such that, e.g., display signals, emitted form a display device  350 , may be transmitted through the window  330  and be observed by users from outside the case  310 . In embodiments of the invention, the window may be made of a material capable of transmitting light having, e.g., a wavelength higher than the visible light wavelength.  
      The case  310  may be formed of a transparent material, an opaque material, or any combination thereof. For example, the engaging portions  312 , which may overlap the display device  350 , may be formed of a transparent material. Generally, the case  310  may be formed of a durable and light-weight material.  
      The display device  350  may be arranged inside of the case  310 . The display device  350  may have a general shape and/or size along an x-z plane that corresponds to a general shape and/or size of the opening  302  along the x-z plane. In embodiments of the invention, the display device  350  may be a liquid crystal display (LCD), etc.  
      As illustrated in  FIGS. 4A-4D , in embodiments of the invention, at least along the x-z plane, the display device  350  and the window  330  may have substantially or exactly the same shape and size.  
      As discussed above, a connecting mechanism  390 , e.g., tape, may be provided between the display device  350  and the window  330 , and the display device  350  and the window  330  may be attached to each other. In embodiments of the invention, the gap g 3  may be defined by a thickness of the connecting mechanism  390 .  
       FIGS. 5A and 5B  illustrate a plan view of exemplary embodiments of a connecting mechanism  390  employable with a display window assembly according to embodiments of the invention. As illustrated in  FIG. 5A , the connecting mechanism  390 , e.g., tape, which may be provided between inner surface  333  of the window  330  and the outer surface  351  of the display device  350  may be formed to have a outer boundary than is within or exactly aligned within an outer boundary of the display unit  350  and/or the window  330 . For example, the outer boundary of the connecting mechanism may be within or completely aligned with a boundary defined by, e.g., sides  352 , of the display device  350 . Thus, in embodiments of the invention, the window  330  and/or the display device  350  may completely overlap and cover the connecting mechanism  390 .  
      As illustrated in  FIGS. 5A and 5B , the connecting mechanism  390  may have a shape that substantially corresponds to a general shape of the outer boundary of the window  330  and/or the display device  350 . The connecting mechanism  390  may be a continuous strip of, e.g., a rectangular shaped adhesive tape, or may be a plurality of adhesive portions arranged at, e.g., opposing corners, sides, portions, etc. of the inner surface  333  of the window  330  and the outer surface  351  of the display device  350 .  
       FIGS. 6A-6D  illustrate cross-sectional views of other exemplary embodiments of a display window assembly of a portable electronic device. Only differences between the exemplary embodiments described above with relation to  FIGS. 4A and 4B  and the exemplary embodiments illustrated in  FIGS. 6A-6D  will be described below.  
       FIGS. 6A and 6B  respectively correspond to the exemplary embodiments illustrated in  FIGS. 4A and 4B , but with a window  330   a . In the exemplary embodiments illustrated in  FIGS. 4A and 4B , the outer surface  331  of the window  330  may extend along a plane below the outer surfaces  312   a  and  314  of the engaging portion  312  and case  310 , respectively. As illustrated in  FIGS. 6A and 6B , a window  330   a  may have an inverted-T-like cross-sectional shape such that an outer surface  331   a  may be aligned with the outer surface  312   a  and  314  of the engaging portion  312  and the case  310 , respectively. As illustrated in  FIGS. 6A and 6B , the window  330   a  may include one or more projecting portions  332  forming, e.g., the inverted T-like cross-sectional shape. In embodiments of the invention, the window  330   a  may have a shape that substantially fills a space defined by respective surfaces of the case  310 , the BLU  370 , the engaging members  312 , the opening  302 , and the outer surface  351  of the display device  350 , excluding gap g 3 .  
       FIGS. 6C and 6D  respectively correspond to the exemplary embodiments illustrated in  FIGS. 6A and 6B , but with engaging portions  312 ′ and window  330   b . Only differences between the exemplary embodiments described above with relation to  FIGS. 4A, 4B ,  6 A and  6 B and the exemplary embodiments illustrated in  FIGS. 6C and 6D  will be described below.  
      In exemplary embodiments, the case  310  may have engaging portions  312 ′ that may extend from an inner portion of the surfaces  311   a ,  311   b  of the case  310 . In the exemplary embodiments illustrated in  FIGS. 6C and 6D , rather than the outer surface  312   a  of the engaging portions  312 ′ being aligned with the outer surface  314  of the case  310 , inner surfaces  312   b  of the engaging portions  312 ′ may be aligned with the inner surface  313  of the case  310 .  
      In the embodiments illustrated in  FIGS. 6C and 6D , the window  330   b  may have a substantially T-shaped cross-sectional shape, and may include one or more protruding portions  322 . Outer surfaces  322   a  of the protruding portions  322  may align with outer surfaces  314  of the case  310  and outer surface  331   b  of the window  330   b . In the exemplary embodiment illustrated in  FIG. 6D , the surfaces  371  of the BLU  370  may connect to inner surfaces  322   b  of the protruding portions  322  of the window  330   b . As illustrated in  FIGS. 6C and 6D , the window  330   b  may occupy a space defined by the case  310 , the engaging portions  312 ′, the outer surface  351  of the display device  350 , excluding gap g 3 .  
      In embodiments of the invention, e.g., embodiments illustrated in  FIGS. 6C and 6D , an outer side of the connecting mechanism  390  may not be overlapped by the case  310  or the engaging member, and may only be overlapped by the window  330   b . As illustrated in  FIGS. 6A-6D , a distance along the y direction of the case  310  may substantially correspond to a distance along the y direction of the window  330   b.    
       FIGS. 7A-7C , illustrate cross-sectional views of exemplary embodiments of a display window assembly respectively illustrated in  FIGS. 4A, 6A , and  6 C, with another exemplary embodiment of a connecting mechanism. The connecting mechanism  390 , e.g., tape, may be provided between the outer surface  351  of the display device  350  and the inner surface  333  of the window  330 ,  330   a ,  330   b  and the surface  371  of the BLU  370 . The connecting mechanism  390  may be integrally or separately formed so that the connecting mechanism  390  provided between the display device  350  and the window  330 ,  330   a ,  330   b  may be further extended between the BLU  370  and the case  310 .  
      In the exemplary embodiments of the display window assemblies  300  described above, the display window assemblies  300  may have a gap g 3  between the window  330 ,  330   a ,  330   b  and the display device  350 , and the gaps g 3  may have a smaller value than the gap g 1  of known display portions  100 , as illustrated in  FIG. 2 , and therefore, it is possible to make the display window assemblies  300  thinner. Embodiments of the invention also enable display window assemblies  300  to be easily assembled while closely attaching the window  330 ,  330   a ,  330   b  and the display device  350  to each other using a connecting mechanism  390 , e.g., tape. Embodiments of the invention provide, e.g., display window assemblies  300  that may be more easily assembled as compared to known display portions  100  at least because, e.g., an adhesion or connecting space may be easily secured, and a cost of the display window assembly may be reduced.  
      In the above description of exemplary embodiments with reference to  FIGS. 3-7C , the display device  350  and the window  330  are illustrated as structures having rectangular or substantially rectangular cross-sectional shapes. Embodiments of the invention are not, however, limited to use with display devices and/or windows having such shapes. For example, a display device and/or a window employed with a case, according to one or more aspects of the invention, may have, e.g., a circular, elliptical, etc. cross-sectional shape. Embodiments of the invention are also not limited for use with a mobile phone, such as the mobile phone  3  illustrated in  FIG. 3 , and may be employed with a wide variety of electronic devices, including a wide variety of portable electronic devices.  
      Exemplary embodiments of the present invention have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. Accordingly, it will be understood by those of ordinary skill in the art that various changes in form and details may be made without departing from the spirit and scope of the present invention as set forth in the following claims.  
      As described above, according to the present invention, the display diode with a window assembly and the mobile phone having it may reduce the manufacturing cost since the final products becomes thinner, and is also easily assembled.