Patent Publication Number: US-2023135900-A1

Title: Backlight module and liquid crystal display

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application 202111281325.8, filed Nov. 1, 2021, the entire disclosure of which is incorporated herein by reference. 
     FIELD OF TECHNOLOGY 
     The disclosure involves to the technical field of display, in particular to a backlight module and a liquid crystal display. 
     BACKGROUND 
     At present, Liquid Crystal Display (LCD) often uses edge-lit backlight, whose light guide plate and light source are provided on the same side of the backplane, close to each other, subject to the thickness of the light source and the thickness of the heat sink, the bezel thinning of the LCD will be constrained. 
     SUMMARY 
     There are provided a backlight module and a liquid crystal display according to embodiments of the present disclosure. 
     According to a first aspect of the present disclosure, there is provided a backlight module including: 
     a backplate; 
     a light guide plate comprising a body part disposed at a side of the backplate facing a display panel, a surface of the body part facing away from the backplate being an out-light surface, and a bending part having a first end face and a second end face arranged in a bending extension direction thereof, the first end face being connected to the body part, the second end face being located on a side of the backplate facing away from the display panel, and the second end face being an in-light surface; and 
     the light source is located on the side of the backplate facing away from the display panel and arranged opposite the second end face. 
     According to a second aspect of the present disclosure, there is provided a liquid crystal display including a display panel and a backlight module including a backplate, a light guide plate and a light source, 
     the light guide plate comprises a body part disposed between the backplate and the display panel, a surface of the body part facing the display panel being an out-light surface, and a bending part having a first end face and a second end face arranged in a bending extension direction thereof, the first end face being connected to the body part, the second end face being located on a side of the backplate facing away from the display panel, and the second end face being an in-light surface; and 
     the light source is located on the side of the backplate facing away from the display panel and arranged opposite the second end face. 
     It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not intended to limit the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings which are incorporated in and constitute a part of the description illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. It will be apparent that the drawings described below are only some embodiments of the present disclosure, and other drawings may be obtained from them without creative effort for those of ordinary skill in the art. 
         FIG.  1    shows a structural schematic view of a backlight module and a printed circuit board assembled according to a first embodiment of the present disclosure. 
         FIG.  2    shows an enlarged schematic view of Part A shown in  FIG.  1   . 
         FIG.  3    shows a structural schematic view of the backlight module and the printed circuit board assembled according to a second embodiment of the present disclosure. 
         FIG.  4    shows a structural schematic view of the backlight module and the printed circuit board assembled according to a third embodiment of the present disclosure. 
         FIG.  5    shows a structural schematic view of a liquid crystal display in the prior art. 
         FIG.  6    shows a structural schematic view of the liquid crystal display according to a fourth embodiment of the present disclosure. 
         FIG.  7    shows a structural schematic view of the liquid crystal display according to a fifth embodiment of the present disclosure. 
         FIG.  8    shows a flowchart of a production assembly method of the liquid crystal display shown in the embodiments of the present disclosure. 
         FIG.  9    shows a structural schematic view of the liquid crystal display in a state of completing step S 700  in the production assembly method shown in the embodiments of the present disclosure. 
         FIG.  10    shows a structural schematic view of the liquid crystal display in a state of completing step S 702  in the production assembly method shown in the embodiments of the present disclosure. 
         FIG.  11    shows a structural schematic view of the liquid crystal display in a state of completing step S 704  in the production assembly method shown in the embodiments of the present disclosure. 
         FIG.  12    shows a structural schematic view of the liquid crystal display in a state of completing step S 706  in the production assembly method shown in the embodiments of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Exemplary embodiments will now be described more comprehensively with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in a variety of forms and should not be construed as being limited to the examples set forth herein. Rather, these embodiments are provided so that the present disclosure will be more comprehensive and complete, and the concept of exemplary embodiments will be fully communicated to those skilled in the art. 
     In the present disclosure, the terms “first”, “second” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying the number of technical features indicated. Thus, the features defined as “first” or “second” may be explicitly or implicitly defined as including one or more of the features. In the description of the present disclosure, “a plurality of” means two or more, unless explicitly and specifically defined otherwise. 
     In this disclosure, the terms “assembly”, “connection” and the like are understood in a broad sense and may be, for example, a fixed connection, a detachable connection, or as a unit, unless otherwise expressly specified and limited; the connection can be a mechanical connection or an electrical connection; or the connection can be a directly connection or an indirect connection by intermediate media, and it can be the internal communication of two elements or the interaction between two elements. For those ordinarily skilled in the art, the specific meanings of the above terms in the present disclosure will be understood according to the specific circumstances. 
     Further, the described features, structures or characteristics may be incorporated in any suitable manner in one or more embodiments. In the following description, many specific details are provided to give a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that one or more of the technical solutions of the present disclosure may be practiced without particular details, or other methods, group elements, devices, steps, etc. may be employed. In other instances, well-known methods, devices, implementations or operations are not shown or described in detail to avoid obscuring aspects of the present disclosure. 
     An embodiment of the disclosure provides a backlight module, which can be applied to a liquid crystal display. As shown in  FIGS.  1  to  4   , the backlight module may include a backplate  10 , a light guide plate  11  and a light source  12 . 
     The entire backplate  10  may have a plate-like structure. In a thickness direction Z of the backplate  10 , the backplate  10  has a front side and a back side. The front side of the backplate  10  refers to the side of the backplate  10  facing the display panel  13 , and the back side of the backplate  10  refers to the side of the backplate  10  facing away from the display panel  13 , as shown in  FIGS.  6  and  7   . 
     The light guide plate  11  can be bent. In detail, as shown in  FIG.  2   , the light guide plate  11  may include a body part  110  and a bending part  111 . The body part  110  may be located on the front side of the backplate  10 , and the bending part  111  has a first end face  111   a  and a second end face  111   b  which are provided in a bending extension direction thereof. The first end face  111   a  of the bending part  111  is connected to the body part  110 , and the second end face  111   b  of the bending part  111  is located on the back side of the backplate  10 . The surface of the body part  110  facing away from the backplate  10  is an out-light surface, and the second end face  111   b  of the bending part  111  is an in-light surface. 
     The light source  12  may be located on the back side of the backplate  10  and is disposed opposite the second end face  111   b  (i.e., the in-light surface) of the bending part  111 . The light emitted by the light source  12  may enter the bending part  111  through the second end face  111   b  of the bending part  111 , then enter the body part  110  through the first end face  111   a  of the bending part  111 , and then emit to the display panel  13  through the out-light surface of the body part  110 . For example, the light source  12  may be an LED (Light Emitting Diode) lamp. 
     According to the present disclosure, the light guide plate  11  can be arranged in a bent-shaped structure. The in-light surface of the light guide plate  11  is bent to the back side of the backplate  10  so that the light source  12  can be arranged on the back side of the backplate  10 . Compared with the solution of the side-lit backlight liquid crystal display shown in  FIG.  5   , specifically, in the liquid crystal display shown in  FIG.  5   , the overall light guide plate  11  has a plate-like structure, and the light guide plate  11 , the light source  12  and the heat sink  14  for heat dissipation of the light source  12  are located on the same side of the backplate  10 , that is, on the side of the backplate  10  facing the display panel  13 , and the backplate  10  may have a folding part  112  folded upward (i.e., in a direction where the light guide plate  11  is located) to restrict the movement of the light source  12 . The present disclosure can avoid the restriction of the thickness of the light source  12 , the thickness of the heat sink  14  and the thickness of the folding part  112  of the backplate  10  on the bezel design, so that a narrower bezel or no bezel can be achieved. 
     In addition, by arranging the light source  12  and the in-light surfaces of the light guide plate  11  on the back side of the backplate  10 , while achieving the narrower bezel or no bezel, the space on the back side of the backplate is relatively large, it is beneficial for the light source  12  to dissipate heat, thereby saving adopting the heat dissipation structure and reducing the cost, also the spacing between the light source  12  and the in-light surface of the light guide plate  11  can be appropriately increased, thereby avoiding the damage to the light source  12  when the light guide plate  11  is heated and expanded, and prolonging the service life of the product. 
     The configuration of the backlight module of different embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. 
     Embodiment 1 
     As shown in  FIGS.  1  and  2   , the body part  110  of the light guide plate  11  may have a plate-like structure as a whole, i.e., the body part  110  may have equal thickness at all points. The bending part  111  of the light guide plate  11  may be bent uniformly, i.e., the bending parts  111  may have equal or substantially equal thickness at all points. 
     The thickness of the folding part  111  may be equal to the thickness of the body part  110 , i.e., the thickness of the entire light guide plate  11  is uniformly arranged. This design ensures the structural strength of the light guide plate  11  and the light guide effect of the light guide plate  11 . 
     It should be noted that the light guide plate  11  of the embodiment of the present disclosure can be formed by integral injection molding, so that the difficulty of manufacturing the light guide plate  11  can be reduced, and the structural strength of the light guide plate  11  as a whole can be ensured. 
     By way of example, the bending part  111  of the embodiment of the present disclosure may have an arc shape in its entirety to ensure the bending strength of the bending part  111 . 
     For example, the scratch-proof protective layer  15  may be provided on an outer surface of the end of the backplate  10  close to the bending part  111  to avoid the case that the end portion of the backplate  10  scratches the light guide plate  11  during the assembly process, so as to ensure the light guiding performance of the light guide plate  11 . 
     It should be understood that in order to prevent the backplate  10  from scratching the light guide plate  11 , the scratch-proof protective layer  15  is not limited to being provided at the end portion of the backplate  10  as mentioned above, and the scratch-proof protective layer  15  may be provided at the inner surface of the bending part  111 , or the end portion of the backplate  10  close to the bending part  111  may be provided in an arc, or any two or three of these arrangements are possible, which depends on individual situations. 
     In this embodiment, a first reflective layer  16  may be provided between the body part  110  and the backplate  10 , and the first reflective layer  16  may reflect light in the body part  110  so that more light is emitted from the out-light surface of the body part  110  and light loss is reduced. 
     By way of example, the first reflective layer  16  may be attached to the surface of the body part  110  facing the backplate  10  by coating, electroplating or the like, but is not limited thereto, and may also be attached to the front side of the backplate  10 . Alternatively, the first reflective layer  16  may be formed independently of the backplate  10  and the light guide plate  11  in a reflective structure and sandwiched between the body part  110  of the light guide plate  11  and the backplate  10 , etc. 
     In order to reduce light loss, a second reflective layer  17  may also be provided in a region opposite to the light source  12  on the back side of the backplate  10 . The orthographic projection of the light source  12  on the backplate  10  can be located in the second reflective layer  17 , so that the light irradiated on the backplate  10  is reflected, and at least part of the reflected light may enter the light guide plate  11  through the in-light surface (i.e., the second end face  111   b ) of the bending part  111  to exit through the light guide plate  11 . This design improves the light utilization. 
     For example, the second reflective layer  17  may be attached to the back side of the backplate  10  by coating, electroplating or the like. Alternatively, the second reflective layer  17  may be formed independently of the backplate  10  in a reflective structure and adhered to the back side of the backplate  10 , or the back surface of the backplate  10  may be directly treated to form a reflective layer etc., which depends on the circumstances. 
     Further, a third reflective layer  18  may be provided on the outer surface of the bending part  111  (i.e., the surface away from the backplate  10 ) to reduce the light loss. It should be understood that the reflective layer may not be provided only on the outer surface of the bending part  111 , but may be provided on all but the first end face  111   a  and the second end face  111   b  of the bending part  111  to improve the light utilization. 
     For example, the third reflective layer  18  may be attached to the outer surface of the bending part  111  by coating or electroplating. Alternatively, the third reflective layer  18  may be formed independently of the light guide plate  11  in a light emitting structure and attached to the outer surface of the bending part  111 , which depends on the circumstances. 
     It should be noted that the first reflective layer  16 , the second reflective layer  17 , and the third reflective layer  18  mentioned above are not limited to being present in the backlight module at the same time, but only one of the first reflective layer  16 , the second reflective layer  17 , and the third reflective layer  18  may be present in the backlight module, or any two combination of the first reflective layer  16 , the second reflective layer  17 , and the third reflective layer  18  may be present in the backlight module, or the like, which depends on the circumstances. 
     In this embodiment, the light source  12  can be integrated on a printed circuit board (PCBA)  19  bound to the display panel  13 . Such a design does not require an additional connection line to connect the light source  12  and the printed circuit board  19 , and when the display panel  13  is installed, the light source  12  can be installed integrally, which simplifies the installation process and improves the assembly efficiency and accuracy. 
     Specifically, the printed circuit board  19  may be located on the back side of the backplane  10 , and may be bound to the binding area  131   a  of the display panel  13  through a chip on film (COF)  20  for providing a display signal to the display panel  13 . 
     It should be understood that the printed circuit board  19  may also be connected to other main control boards or power supply boards to enable controlled input of signals and currents to the display panel  13  and the light source  12 , so as to control product display. 
     In this embodiment, the back side of the backplate  10  may be provided with a securing column  21 . For example, the securing column  21  and the backplate  10  may have an integrated structure, but not limited to this, the securing column  21  may also be connected to the back side of the backplate  10  by welding, riveting or the like. The printed circuit board  19  can be connected to the securing column  21  to achieve fixing between the printed circuit board  19  and the backplate  10 , thereby ensuring the assembly stability between the printed circuit board  19  and the backplate  10 . 
     For example, a height of the securing column  21  may be greater than a thickness of the light source  12  to leave a space between the light source  12  and the back side of the backplate  10  after the printed circuit board  19  is connected to the securing column  21 , which is beneficial to heat dissipation on the one hand, and can avoid the situation that the backplate  10  scratches the light source  12  on the other hand. 
     In the embodiment of the present disclosure, the backlight module may also include a middle bezel  22  and an optical control element  23 . 
     The middle bezel  22  may have a receiving slot  220  receiving the bending part  111  for supporting the light guide plate  11 , and a supporting pad  24  may be provided on the middle bezel  22  for supporting the display panel  13 , that is, the middle bezel  22  may also function as supporting the display panel  13 . 
     The optical control element  23  may be provided on the side of the body part  110  facing the display panel  13 , and the optical control element  23  may adjust the light emitted from the out-light surface of the body part  110  to reduce the light loss, allow the light entering the display panel  13  more uniform, and improve the display effect. 
     For example, the optical control element  23  may include but is not limited to an increment film, a diffusion sheet or the like, which depends on the circumstances. 
     Embodiment 2 
     The main difference between this embodiment and Embodiment 1 is that: in the backlight module of embodiment 2, as shown in  FIG.  3   , the folding part  111  of the light guide plate  11  may have equal or substantially equal thickness at all points, and the thickness of the folding part  111  may be smaller than the thickness of the body part  110 . This design can reduce the limitation of the thickness of the folding part  111  of the light guide plate  11  on the thinning of the bezel, that is, a narrow bezel design or bezel-less design can be achieved. 
     It should be understood that the backlight module of Embodiment 2 and the backlight module of Embodiment 1 of the present disclosure may be identical in design except for the aforementioned differences but are not limited thereto, and may be different depending on the circumstances. 
     For example, the bending part  111  of the embodiment of the present disclosure is not limited to being in an arc shape as a whole, but may be triangular or approximately triangular or other polygonal depending on the circumstances. 
     The ratio of the thickness of the folding part  111  to the thickness of the body part  110  may be greater than or equal to ⅓. This design reduces the restriction of the thickness of the folding part  111  of the light guide plate  11  on the thinning of the bezel, and at the same time, it can avoid the situation that the thickness of the folding part  111  is too small with respect to the body part  110 , resulting in poor light guide effect. 
     Embodiment 3 
     The main difference between this embodiment and Embodiments 1 and 2 is that: in the backlight module of the third embodiment, as shown in  FIG.  4   , in a direction from the first end face  111   a  to the second end face  111   b  of the bending part  111  of the light guide plate  11 , the thickness of the bending part  111  is gradually reduced, and the maximum thickness of the bending part  111  is less than or equal to the thickness of the body part  110 . This design reduces the restriction of the thickness of the bending part  111  of the light guide plate  11  on the thinning of the bezel, and at the same time ensures the structural strength of the junction of the bending part  111  and the body part  110 , thereby ensuring the structural stability of the light guide plate  11 . 
     It should be understood that the backlight module of Embodiment 3 and the backlight module of Embodiments 1 and 2 of the present disclosure may be identical in design except for the aforementioned differences but are not limited thereto, and may be different depending on the circumstances. 
     For example, the bending part  111  of the embodiment of the present disclosure may have an arc shape or other polygonal shape as a whole, which depends on the circumstances. 
     The ratio of the minimum thickness of the folding part  111  (that is, the thickness of the second end face  111   b ) to the thickness of the body part  110  may be greater than or equal to ⅓. This design reduces the restriction of the thickness of the folding part  111  of the light guide plate  11  on the thinning of the bezel, and at the same time, and can also avoid the situation that the area at the second end face  111   b  is too small to cause poor light guide effect. 
     It should be noted that the thickness of the folding part  111  is not limited to gradually decreasing, and the thickness of the folding part  111  may be provided unevenly, including a region with a large thickness or a region with a small thickness, and the ratio between the region with the smallest thickness and the region with the largest thickness does not exceed ⅓. 
     The present disclosure also provides a liquid crystal display, as shown in 
       FIGS.  5  and  6   , which may include a display panel  13  and a backlight module as mentioned in any of the preceding embodiments. 
     The backlight module may include a backplate  10 , a light guide plate  11  and a light source  12 . The light guide plate  11  may include a body part  110  and a bending part  111 . The body part  110  may be located between the backplate  10  and the display panel  13 , and the surface of the body part  110  facing the display panel  13  is an out-light surface. The bending part  111  has a first end face  111   a  and a second end face  111   b  arranged in a bending extension direction thereof, the first end face  111   a  is connected to the body part  110 , the second end face  111   b  is located on the side of the backplate  10  facing away from the display panel  13 , and the second end face  111   b  is an out-light surface. The light source  12  is located on the side of the backplate  10  facing away from the display panel  13  and is disposed opposite the second end face  111   b.    
     The liquid crystal display further includes a printed circuit board  19 , and a securing column  21  is provided on a side of the backplate  10  facing away from the body part  110 . The printed circuit board  19  is located on the side of the backplate  10  facing away from the body part  110  and is connected to the securing column  21 . The side of the printed circuit board  19  facing the backplate  10  is integrated with the light source  12 . 
     It should be understood that the specific configuration of the backlight module and the relationship between the backlight module and the printed circuit board  19  of the embodiment of the present disclosure can be described with reference to any of the foregoing embodiments and will not be repeated here. 
     Further, it should be noted that the liquid crystal display of the present disclosure is not limited to the aforementioned backlight module, printed circuit board  19 , display panel  13  and the like, but may also include a back cover  26 , a front bezel  27  and the like. 
     The specific arrangement of the display panel  13  in different embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. 
     Embodiment 4 
     As shown in  FIG.  6   , the display panel  13  may include a color filter substrate  130  and an array substrate  131  arranged by cell assembling. It should be understood that when the display panel  13  is a liquid crystal display, the display panel  13  may also include liquid crystal molecules (not shown) located between the color filter substrate  130  and the array substrate  131 , that is, the display panel  13  may be a liquid crystal cell. 
     As shown in  FIG.  6   , the array substrate  131  may have a binding area  131   a  and a cell assembling area  131   b.  The binding area  131   a  of the array substrate  131  can be bound to the printed circuit board  19  through the chip on film  20 , a driver chip (IC)  25  is provided on the side of the chip on film  20  close to the middle bezel  22 . The middle bezel  22  has a slot body accommodating the driver chip  25 , which supports and limits the positions of the driver chip  25  and the chip on film  20 , and at the same time, it can achieve the purpose of rationally utilizing the space in each place of the liquid crystal display, thereby achieving a narrow bezel or a bezel-less design. It should be noted that the binding position of the binding area  131   a  of the array substrate  131  is close to the color filter substrate  130 . 
     The cell assembling area  131   b  may be an area disposed opposite the color filter substrate  130 . Specifically, the cell assembling area  131   b  may include a display region and a sealing region surrounding the display region. The sealing region may be provided with a sealant (not shown) between the color filter substrate  130  and the array substrate  131 , and the liquid crystal molecules are located in the display region surrounded by the sealant. 
     In embodiments of the present disclosure, as shown in  6 , the array substrate  131  may be located on a side of the color filter substrate  130  facing the backlight module. Specifically, the array substrate  131  may be positioned on the side of the color filter substrate  130  facing the light guide plate  11 , so that the binding area  131   a  of the array substrate  131  and the chip on film  20  are conveniently bound, and the failure of the binding area  131   a  of the array substrate  131  and the chip on film  20  due to the influence of gravity can be avoided, that is, the binding stability of the array substrate  131  and the chip on film  20  is improved. 
     It should be understood that the display panel  13  of the embodiment of the present disclosure may include a lower polarizer (not shown) located on the side of the array substrate  131  facing away from the color filter substrate  130  and an upper polarizer (not shown) located on the side of the color filter substrate  130  facing away from the array substrate  131  in addition to the array substrate  131  and the color filter substrate  130  mentioned above. 
     Further, it should be understood that the display panel  13  in the embodiment 4 may be combined with the backlight module of any of the foregoing embodiments 1 to 3. 
     Embodiment 5 
     The main difference between this embodiment and embodiment 4 is that: in the liquid crystal display in embodiment 5, as shown in  FIG.  7   , the color filter substrate  130  may be positioned on the side of the array substrate  131  close to the light guide plate  11 , so that the binding position of the binding area  131   a  of the array substrate  131  is directed downward. As the binding position is achieved at the chip on film  20 , the chip on film  20  may be shielded by the binding area  131   a  of the array substrate  131 , which can further realize the very narrow bezel or bezel-less design. 
     It should be understood that the liquid crystal display of embodiment 5 and the liquid crystal display of embodiment 4 of the present disclosure may be identical in design except for the aforementioned differences but are not limited thereto and may be different depending on the circumstances. 
     Further, it should be understood that the display panel  13  in embodiment 5 may be combined with the backlight module of any of the foregoing embodiments 1 to 3. 
     The present disclosure also provides a production and assembly method of the liquid crystal display described in any of the foregoing embodiments, as shown in  FIG.  8   , which specifically includes steps S 700 , S 702 , S 704 , S 706  and S 708 . 
     In step S 700 , an LED lamp is patched onto the printed circuit board  19 , as shown in  FIG.  9   .  FIG.  9    shows a structural schematic view of the liquid crystal display in a state of completing step S 700  in the production assembly method shown in the embodiments of the present disclosure. 
     In step S 702 , the binding area  131   a  of the display panel  13  is bound to the printed circuit board  19  by the chip on film  20  with the driver chip  25 , as shown in  FIG.  10   .  FIG.  10    shows a structural schematic view of the liquid crystal display in a state of completing step S 702  in the production assembly method shown in the embodiments of the present disclosure. It should be noted that step S 702  may be completed following step S 700  but is not limited thereto, and may be completed prior to step S 700  or the like, which depends on the circumstances. 
     In step S 704 , the backlight module is assembled, that is, the optical control element  23 , the light guide plate  11 , the backplate  10 , the middle bezel  22  and the like are assembled together, as shown in  FIG.  11   .  FIG.  11    shows a structural schematic view of the liquid crystal display in a state of completing step S 704  in the production assembly method shown in the embodiments of the present disclosure. It should be noted that step S 704  may be performed simultaneously with step S 702  but is not limited thereto, and step S 704  and step S 702  may be performed successively, which depends on the circumstances. 
     In step S 706 , the display panel  13  is mounted into the backlight module, as shown in  FIG.  12   .  FIG.  12    shows a structural schematic view of the liquid crystal display in a state of completing step S 706  in the production assembly method shown in the embodiments of the present disclosure. That is, the backlight module of step S 704  and the display panel  13  of step S 702  are assembled together. 
     In step S 708 , the back cover  26 , the front bezel  27  and other accessories are assembled to complete the assembly, as shown in  FIG.  6   .  FIG.  6    shows a structural schematic view of the liquid crystal display in a state of completing step S 708  in the production assembly method shown in the embodiments of the present disclosure, and  FIG.  6    shows a structural schematic view of the liquid crystal display according to the fourth embodiment of the present disclosure. 
     It should be understood that the production and assembly method of the liquid crystal display of the present disclosure is not limited to the aforementioned assembly method, and other assembly methods may be adopted as long as the fast and stable installation of the liquid crystal display can be achieved. 
     According to the present disclosure, the light guide plate is provided with a bend-shaped structure, so that the in-light surface of the light guide plate is bent to the back side of the backplate (namely, a side of the backplate facing away from the display panel), the light source is opposite to the in-light surface of the light guide plate, the light emitted from the light source can enter the light guide plate through the in-light surface, and then emitted out from the out-light surface positioned at a front side of the backplate (namely, the side of the backplate facing the display panel) in the light guide plate. Compared with the side-lit backlight, this design can avoid the constraints of light source thickness, heat sink thickness and backplate folding thickness on the bezel design, thereby achieving narrower bezel design or bezel-less design. 
     In addition, by arranging the in-light surfaces of the light guide plate and the light source on the back side of the backplate, while achieving the narrower bezel design or bezel-less design, the space on the back side of the backplate is relatively large, the spacing between the light source and the in-light surface of the light guide plate can be appropriately increased, thereby avoiding the damage to the light source when the light guide plate is heated and expanded, and prolonging the service life of the product. 
     Other features and advantages of the present disclosure will become apparent from the following detailed description or will be acquired in part through the practice of the present disclosure. 
     In the description of this description, illustrations of the reference terms “some embodiments”, “exemplified”, etc. mean that specific features, structures, materials, or features described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the description, the schematic formulation of the above terms need not be directed to the same embodiments or examples. Further, the specific features, structures, materials or features described may be combined in a suitable manner in any one or more embodiments or examples. Further, without contradicting one another, those skilled in the art may combine and incorporate different embodiments or examples described in the description and features of different embodiments or examples. 
     Although the embodiments of the present disclosure have been shown and described above, understandably, the above-described embodiments are exemplary and cannot be construed as limiting the present disclosure. Those of ordinary skill in the art may make changes, modifications, substitutions and modifications to the above-described embodiments within the scope of the present disclosure. Therefore, any changes or modifications made in accordance with the claims and descriptions of the present disclosure should fall within the scope of the present disclosure.