Backlight module and display

Abstract

The utility model provides a backlight module and a display with the same. The backlight module comprises a light source module, a back plate and a light guide plate. The back plate comprises a body and a side wall connected to the body, and the side wall is not parallel to the body. The light guide plate is arranged on the back plate and is provided with a top surface, a bottom surface, a light incident surface and at least one side surface. The top surface is opposite to the bottom surface, at least one side surface and the light incident surface are respectively connected between the top surface and the bottom surface, and the light source module is arranged on one side of the light incident surface. The area of the top surface is larger than that of the bottom surface. At least one side face is an inclined face, and the side wall is located below the at least one side face. The side surface of the light guide plate is an inclined surface, so that the brightness of the backlight module is improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a backlight module and a display. Background Art

[0002] During the transportation of the display or during the change of seasons, relative displacement and friction between the back plate and the light guide plate are likely to occur, and a rubber frame disposed between the back plate and the light guide plate is usually used to buffer the aforementioned friction.

[0003] In the existing backlight module, the plastic frame is located between the side wall of the back plate and the light guide plate. Since the materials of the plastic frame and the light guide plate are both plastic materials, the plastic frame acts as a buffer between the back plate and the light guide plate to prevent the friction between the back plate and the light guide plate from causing abnormal images of the display. However, the plastic frame is located in the border area (i.e., non-display area) of the display and occupies a certain space in the border area, so that the minimum width of the border area of ​​the display is limited by the plastic frame. Utility Model Content

[0004] According to the above, the present application provides a backlight module and a display to solve the problem that the minimum width of the border area of ​​the display is limited by the plastic frame.

[0005] Other purposes and advantages of the present application can be further understood from the technical features disclosed in the present application.

[0006] In order to achieve one or part or all of the above purposes or other purposes, the backlight module of one embodiment of the present application includes a light source module, a back plate and a light guide plate. The back plate includes a main body and a side wall connected to the main body, and the side wall is not parallel to the main body. The light guide plate is arranged on the back plate and has a top surface, a bottom surface, a light incident surface and at least one side surface. The top surface is opposite to the bottom surface, at least one side surface and the light incident surface are respectively connected between the top surface and the bottom surface, and the light source module is arranged on one side of the light incident surface. The area of ​​the top surface is larger than the area of ​​the bottom surface. At least one side surface is an inclined surface, and the side wall is located below at least one side surface.

[0007] To achieve one, part, or all of the above purposes or other purposes, a display according to an embodiment of the present application includes the aforementioned backlight module and a display panel.

[0008] In summary, the backlight module of the present application configures the side surface of the light guide plate as an inclined surface, reduces the size of the plastic frame, reduces the width of the display frame, and increases the light-emitting area of ​​the light guide plate to improve the brightness of the backlight module.

[0009] In summary, the display of the present application, based on the aforementioned backlight module, increases the area of ​​the display region and makes at least one side of the display region borderless. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1The figure is a schematic diagram of a display according to an embodiment of the present application.

[0011] Figure 2 A cross-sectional view of a backlight module according to an embodiment of the present application (along the Figure 1 The display is cut along the AA section line of the display).

[0012] Figure 3 A cross-sectional view of a backlight module according to an embodiment of the present application (along the Figure 1 The display is cut along the BB section line).

[0013] Figure 4 A cross-sectional view of a backlight module according to another embodiment of the present application (along the Figure 1 The display is cut along the AA section line of the display).

[0014] Figure 5 A cross-sectional view of a backlight module according to another embodiment of the present application (along the Figure 1 The display is cut along the AA section line of the display).

[0015] Figure 6 A cross-sectional view of a backlight module (along the Figure 1 The display is cut along the AA section line of the display).

[0016] Figure 7 FIG. 4 is a schematic diagram of a display according to another embodiment of the present application.

[0017] Figure 8 for Figure 7 A partial cross-sectional view of a display along section line CC in one embodiment.

[0018] Fig. 9 for Figure 7 A partial cross-sectional view of a display along section line CC of another embodiment.

[0019] Fig.10 for Figure 7 A partial cross-sectional view of a display along section line CC in yet another embodiment.

[0020] Fig.11 for Figure 7 A partial cross-sectional view of a display along section line CC in yet another embodiment.

[0021] Description of reference numerals:

[0022] 1A, 1B: Display

[0023] 10, 10A, 10B, 10C: Backlight module

[0024] 20: Display Panel

[0025] 11, 11A, 11B, 11C: Back panel

[0026] 12: Light guide plate

[0027] 13: Plastic frame

[0028] 14: First adhesive layer

[0029] 15, 15B, 15C: Reflective sheet

[0030] 16: Optical film

[0031] 17: Light source module

[0032] 111, 111A, 111B, 111C: body

[0033] 112, 112A, 112B, 112C: Side wall

[0034] 113: Extension plate

[0035] 114, 114C: Extension

[0036] 121: Top

[0037] 122: Bottom

[0038] 123: Side

[0039] 124: Light incident surface

[0040] 131: Contact surface

[0041] 132: Storage tank

[0042] 151: Part 1

[0043] 152: Part 2

[0044] FC1: Fixing parts

[0045] S1: Upper side

[0046] S2: Lower side

[0047] S3: Left side

[0048] S4: Right

[0049] θ1: first angle

[0050] θ2: Second angle DETAILED DESCRIPTION

[0051] The display of the present application includes a backlight module and a display panel, wherein the backlight module includes a light source module, a back plate and a light guide plate, wherein the side wall of the back plate is located below the side of the light guide plate, thus reducing the width of the display frame. Detailed embodiments are described as follows.

[0052] See also Figure 1 , which is a schematic diagram of a display according to an embodiment of the present application. A rectangular coordinate system XYZ is provided here to facilitate the description of subsequent components. The length direction of the display 1A is parallel to the X axis, the width direction of the display 1A is parallel to the Y axis, and the thickness direction of the display 1A is parallel to the Z axis. Figure 1 As shown, the display 1A includes a backlight module 10 and a display panel 20. The backlight module 10 is, for example, an edge-entry backlight source of the display 1A, and provides an illumination beam to the display panel 20. The backlight module 10 of the present application includes, for example, a light source module, a back plate, and a light guide plate, wherein the side wall of the back plate is located below the side of the light guide plate, so that the width of the display frame can be reduced. The composition of the backlight module 10 will be described in detail below. The display panel 20 is disposed on the backlight module 10 and is used to display an image, so that the illumination beam transmitted to the display panel 20 is converted into an image beam; for example, the display panel 20 is a liquid crystal display panel.

[0053] See also Figure 2 and Figure 3 , which are cross-sectional views of a backlight module according to an embodiment of the present application (along Figure 1 The display 1A is cut along the AA section line, and Figure 1 Here, the configuration of the backlight module 10 of this embodiment will be described with reference to the cross-sectional views of the display 1A cut along the XZ plane and the YZ plane. Figure 2 and Figure 3 As shown, the backlight module 10 includes a light source module 17 , a back plate 11 and a light guide plate 12 .

[0054] The back plate 11 includes a body 111 and a side wall 112 connected to the body 111, and the side wall 112 is not parallel to the body 111. In this embodiment, the body 111 may have an opening or a concave-convex pattern (such as a stamped or punched pattern), the side wall 112 and the body 111 are integrally formed, and the side wall 112 is bent in a direction away from the body 111 and is arranged perpendicular to the body 111. Specifically, the side wall 112 extends upward along the Z axis from the edge of the body 111, and the extension direction of the side wall 112 is perpendicular to the plane where the body 111 is located. For example, the back plate 11 has side walls 112 on the upper side S1, the lower side S2, the left side S3 and the right side S4 of the display 1A, respectively, the two side walls 112 on the upper side S1 and the lower side S2 of the display 1A are arranged oppositely, and the two side walls 112 on the left side S3 and the right side S4 of the display 1A are arranged oppositely, and the four side walls 112 are connected to the body 111 in a bending manner.

[0055] The light guide plate 12 has a top surface 121, a bottom surface 122, at least one side surface 123 and a light incident surface 124 (indicated by Figure 3 ). The top surface 121 is opposite to the bottom surface 122, the area of ​​the top surface 121 is larger than the area of ​​the bottom surface 122, and the bottom surface 122 is located between the top surface 121 and the body 111 of the back plate 11. At least one side surface 123 is connected between the top surface 121 and the bottom surface 122 and is an inclined surface, and the side wall 112 on one side of the display 1A is located below the corresponding at least one side surface 123; in other words, at least one side surface 123 is located above the corresponding side wall, for example, more than 90% of the projection area of ​​the side wall 112 on the top surface 121 falls within the projection area of ​​the side surface 123 on the top surface 121. Specifically, the light guide plate 12 is a hexahedron, the top surface 121 and the bottom surface 122 are the top surface and the bottom surface of the hexahedron, the number of at least one side surface 123 is, for example, three, the three side surfaces 123 and the light incident surface 124 are the four side surfaces of the hexahedron, the three side surfaces 123 correspond to the three side walls 112 located on the upper side, the left side, and the right side of the display 1A, respectively, the three side walls 112 corresponding to the upper side S1, the left side S3, and the right side S4 of the display 1A are respectively located below the corresponding three side surfaces 123, the three side surfaces 123 have three different or the same inclination angles relative to the bottom surface 122, the inclination angle is, for example, greater than or equal to 105 degrees and less than or equal to 165 degrees, but the present application is not limited thereto. In other embodiments, the number of at least one side surface 123 is, for example, one or two, for example, it can be located on the left side S3 and the right side S4 of the display 1A, but the present application is not limited thereto. In one embodiment, the outer edge of the side wall 112 on the same side of the display 1A (e.g., the left side S3 of the display 1A) is, for example, aligned with the edge of the top surface 121 of the light guide plate 12 (or the difference is less than 5% of the width of the top surface 121). Figure 2In the embodiment, the width of the top surface 121 of the light guide plate 12 is, for example, greater than or equal to the width of the back plate 11 , and the width of the bottom surface 122 of the light guide plate 12 is, for example, less than the width of the back plate 11 .

[0056] In the present embodiment, the backlight module 10 further includes a plastic frame 13. The plastic frame 13 is located on the body 111 and is adjacent to the light guide plate 12. For example, the plastic frame 13 is bonded to the three side walls 112 of the upper side S1, the left side S3 and the right side S4 of the display 1A through a first adhesive layer 14 (for example, double-sided adhesive). In other words, the plastic frame 13 is disposed between the side wall 112 and the corresponding side surface 123. The number of contact surfaces 131 of the plastic frame 13 contacting the light guide plate 12 corresponds to the number of at least one side surface 123, for example, three. The three contact surfaces 131 of the plastic frame 13 are all inclined surfaces. The three contact surfaces 131 of the plastic frame 13 face the corresponding three side surfaces 123. The contact surfaces 131 are, for example, parallel to the corresponding side surfaces 123. In addition, the plastic frame 13 further includes a receiving groove 132. The receiving groove 132 is not connected to the contact surface 131. The number of the receiving grooves 132 corresponds to the number of the side walls 112. The three receiving grooves 132 receive the three side walls 112 respectively.

[0057] The backlight module 10 may selectively include a reflective sheet 15 and an optical film 16. The reflective sheet 15 is disposed between the body 111 and the bottom surface 122 of the light guide plate 12, and is located between the two contact surfaces 131 of the rubber frame 13. The optical film 16 is disposed on the top surface 121 of the light guide plate 12. Because the display panel 20 is located above the backlight module 10, the optical film 16 is located between the light guide plate 12 and the display panel 20. For example, the optical film 16 includes optical elements such as a diffuser, an optical brightness enhancement film, a wavelength conversion film, a prism sheet or a composite prism sheet. The aforementioned optical elements are only listed and are not used to limit the present application. The number of optical films 16 may be one or more.

[0058] The light incident surface 124 is connected between the top surface 121 and the bottom surface 122, and is respectively disposed perpendicular to the top surface 121 and the bottom surface 122. Specifically, the light incident surface 124 is a side surface of a hexahedron and is adjacent to two side surfaces 123 corresponding to the left side S3 and the right side S4 of the display 1A, and corresponds to the side wall 112 of the lower side S2 of the display 1A (such as Figure 3 The light source module 17 is disposed on one side of the light incident surface 124 and on the body 111, and is separated from the side wall 112 corresponding to the lower side S2 of the display 1A. For example, the light source module 17 includes a light emitting diode (LED) light source element, which is only an example and is not intended to limit the present application.

[0059] The back panel 11 may selectively include an extension plate 113. The extension plate 113 is connected to the side wall 112 of the lower side S2 of the corresponding display 1A in a bent manner. Specifically, the extension plate 113 extends from the edge of the side wall 112 of the lower side S2 of the corresponding display 1A along the Y-axis toward the optical film 16, but does not contact the optical film 16; in other words, the extension plate 113 is arranged parallel to the body 111, the extension plate 113 is arranged perpendicular to the side wall 112 of the lower side S2 of the corresponding display 1A, the extension plate 113 is separated from the optical film 16, a part of the light guide plate 12 and the light source module 17 are located between the body 111 and the extension plate 113, and the top surface 121 and the bottom surface 122 of the light guide plate 12 are adjacent to the extension plate 113 and the body 111 of the back panel 11, respectively. That is, the extension plate 113 covers the light source module 17.

[0060] In the backlight module of this embodiment, the side surface of the light guide plate and the contact surface of the plastic frame contacting the light guide plate are configured as inclined surfaces, thereby expanding the light emitting area of ​​the light guide plate, reducing the volume of the plastic frame and hiding the plastic frame under the light guide plate, thereby improving the brightness of the backlight module.

[0061] See also Figure 4 , which is a cross-sectional view of a backlight module according to another embodiment of the present application (along Figure 1 Here, the configuration of the backlight module 10A of another embodiment will be described with reference to a partial cross-sectional view of the display 1A cut along the XZ plane. Figure 4 As shown, Figure 4 The embodiment shown is Figure 2 The difference of the embodiment shown is that the side wall 112A of the back plate 11A is bent to form an inverted U-shaped structure, and the thickness of the side wall 112A of the back plate 11A (eg Figure 4 As shown, the width of the side wall 112A in the X direction) is greater than the thickness of the body 111A of the back plate 11 (as shown in FIG. Figure 4 By configuring at least one side wall 112A of the back plate 11 (e.g., the three side walls 112A corresponding to the upper side S1, right side S4, and left side S3 of the display 1A) as an inverted U-shaped structure, the support strength of the back plate 11A supporting the plastic frame 13 and the light guide plate 12 is increased.

[0062] See also Figure 5 , which is a cross-sectional view of a backlight module according to yet another embodiment of the present application (along the Figure 1 Here, the configuration of the backlight module 10B of another embodiment will be described with reference to a partial cross-sectional view of the display 1A cut along the XZ plane. Figure 5 As shown, Figure 5 The embodiment shown is Figure 2The differences of the embodiment shown are: the back plate 11B is provided and the backlight module 10B is not provided with a plastic frame.

[0063] In the present embodiment, the back plate 11B includes a main body 111B and a side wall 112B bently connected to the main body 111B. The side wall 112B is bent in a direction away from the main body 111B and is arranged obliquely with respect to the main body 111B. Specifically, the side wall 112B extends obliquely upward from the edge of the main body 111B. For example, the three side walls 112B corresponding to the upper side S1, the left side S3 and the right side S4 of the display 1A are all inclined surfaces, and correspond to the three side surfaces 123 of the light guide plate 12. Each side wall 112B has a first angle θ1 with the main body 111B, and each side surface 123 has a second angle θ2 with the bottom surface 122. The first angle θ1 is greater than or equal to 120 degrees and less than or equal to 150 degrees, and the difference between the first angle θ1 and the second angle θ2 is less than 5 degrees.

[0064] In addition, the back plate 11B may selectively include an extension portion 114, which is bent and connected to the side wall 112B. Specifically, the number of the extension portions 114 is, for example, three, and the three extension portions 114 are connected to the upper side S1, the left side S3 and the right side S4 of the display 1A (see Figure 1 ) are arranged correspondingly on the three side walls 112B of the main body 111B, each extension portion 114 extends downward along the -Z axis from the corresponding side wall 112B away from the edge of the main body 111B, and the normal vector of the plane where each extension portion 114 is located is perpendicular to the normal vector of the plane where the main body 111B is located. It is particularly noted that each side wall 112B may be selectively provided with an extension portion 114, that is, the number of extension portions 114 may be less than or equal to the number of side walls 112B. In one embodiment, in one direction (for example, in a direction parallel to the X-axis), the width of the top surface 121 of the light guide plate 12 is, for example, greater than or equal to the width of the back plate 11B, and the width of the bottom surface 122 of the light guide plate 12 is, for example, less than the width of the back plate 11B.

[0065] The reflective sheet 15B of the backlight module 10B includes a first portion 151 and a second portion 152; the first portion 151 is disposed between the body 111B and the bottom surface 122 of the light guide plate 12, and the second portion 152 is connected to the first portion 151 in a bent manner. Specifically, there are three second portions 152, and the three second portions 152 are connected to the upper side S1, the left side S3, and the right side S4 of the display 1A (see Figure 1 ), each second portion 152 extends obliquely upward from the edge of the first portion 151 and is arranged obliquely with respect to the first portion 151. In other words, each second portion 152 is an inclined surface, each second portion 152 is arranged between the corresponding side wall 112B and the side surface 123, and each second portion 152 is, for example, parallel to the corresponding side surface 123.

[0066] In the backlight module of the present embodiment, by configuring the side of the light guide plate and the side wall of the back plate to be inclined relative to the bottom surface 122, there is no need to configure a plastic frame and at the same time achieve a borderless effect, eliminating the cost and process of plastic frame materials and assembling the plastic frame to the backlight module, thereby saving the manufacturing cost of the backlight module.

[0067] See also Figure 6 , which is a cross-sectional view of a backlight module according to another embodiment of the present application (along the Figure 1 Here, the configuration of the backlight module 10C of another embodiment will be described with reference to a partial cross-sectional view of the display 1A cut along the XZ plane. Figure 6 As shown, Figure 6 The embodiment shown is Figure 5 The difference of the embodiment shown is that each extension portion 114C of the back plate 11C of the backlight module 10C further includes a portion bent toward the main body 111C. Figure 6 The backlight module 10C may selectively include a plurality of fixing members FC1, which are disposed on the three extensions 114C, for example, at the ends of the extensions 114C, to assist in fixing each of the bent extensions 114C to other structural components or adjacent backlight modules 10C. The fixing methods of the plurality of fixing members FC1 and the three extensions 114C may be welding, screw locking, tape bonding, or sheet metal interlocking.

[0068] See also Figure 7 , which is a schematic diagram of a display according to another embodiment of the present application. Figure 7 As shown, the display 1B includes a plurality of backlight modules 10 and a display panel 20. For example, the number of the plurality of backlight modules 10 is four, two backlight modules 10 are arranged in the upper half of the display 1B, and the two light source modules 17 of the two backlight modules 10 arranged in the upper half of the display 1B are arranged on the upper side S1 of the display 1B; the remaining two backlight modules 10 are arranged in the lower half of the display 1B, and the two light source modules 17 of the two backlight modules 10 arranged in the lower half of the display 1B are arranged on the lower side S2 of the display 1B. In this way, the splicing of four backlight modules 10 can be completed, and there will be no obvious borders between the backlight modules 10. The number of the plurality of backlight modules 10 can be adjusted according to actual needs and is not limited to the present application. The display panel 20 is arranged on the plurality of backlight modules 10, and can be selectively a single display panel (covering a plurality of backlight modules 10 at the same time) or a plurality of display panels without borders.

[0069] Figures 8 to 11 Based on Figure 2 , Figure 4 , Figure 5 and Figure 6 The configuration of splicing multiple backlight modules is used, and two backlight modules are taken as an example to schematically illustrate the splicing status of multiple backlight modules.

[0070] like Figure 8 As shown, since the side surface 123 of each light guide plate 12 is a slope, the light-emitting areas of the two light guide plates 12 are connected, thereby achieving a borderless effect. On the other hand, a single optical film 16 and a single display panel 20 can simultaneously cover the light guide plates of two backlight modules 10, thereby optimizing (reducing) the splicing marks of multiple backlight modules 10. The size of the optical film 16 and the number of optical films included are adjusted according to the display requirements of the display, and are not limited to the scope listed in this application.

[0071] Figure 4 Backlight module 10A, Figure 5 Backlight module 10B and Figure 6 The splicing configuration of the backlight module 10C is shown in Fig. 9 , Fig.10 and Fig.11 In addition, if Fig.10 As shown, when two adjacent backlight modules 10B are spliced, a plurality of fixing members FC1 can be used to assist in fixing a plurality of adjacent backlight modules 10. Fig.11 As shown, when two backlight modules 10 are spliced ​​together, two fixing members FC1 are added in the two extension portions 114 , and the two fixing members FC1 strengthen the fixation of the two extension portions 114 .

[0072] In summary, the backlight module of the present application can reduce the size of the plastic frame or eliminate the setting of the plastic frame by configuring the side of the light guide plate as an inclined surface, thereby reducing the width of the display frame and increasing the light-emitting area of ​​the light guide plate to improve the brightness of the backlight module.

[0073] In summary, the display of the present application, based on the aforementioned backlight module, increases the area of ​​the display region and makes at least one side of the display region borderless.

[0074] However, what is described above is only the preferred embodiment of the present application, and it should not be used to limit the scope of implementation of the present application. That is, all simple equivalent changes and modifications made according to the claims and description of the present application are still within the scope of the patent of the present application. In addition, any embodiment of the present application may not achieve all the purposes, advantages or features disclosed in this application. In addition, the abstract and title are only used to assist in searching patent documents, and are not used to limit the scope of rights of the present application. In addition, the terms "first", "second", etc. mentioned in this specification or claims are only used to name the name of the element or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of elements.

Claims

1. A backlight module, characterized in that: Including light source module, back panel and light guide plate: The light source module; The back panel includes a main body and a side wall connected to the main body, wherein the side wall is not parallel to the main body; and the light guide plate is arranged on the back panel and has a top surface, a bottom surface, a light incident surface and at least one side surface, the top surface is opposite to the bottom surface, the at least one side surface and the light incident surface are respectively connected between the top surface and the bottom surface, the light source module is arranged on one side of the light incident surface, the area of ​​the top surface is larger than the area of ​​the bottom surface, the at least one side surface is an inclined surface, and the side wall is located below the at least one side surface.

2. The backlight module according to claim 1, characterized in that: The side wall is bent in a direction away from the main body and is inclined with respect to the main body. The side wall is arranged corresponding to the at least one side surface. A first angle is formed between the side wall and the main body. A second angle is formed between the at least one side surface and the bottom surface. The difference between the first angle and the second angle is less than 5 degrees.

3. The backlight module according to claim 2, characterized in that: It further includes a reflective sheet, which includes a first part and a second part, the first part is arranged between the main body and the bottom surface of the light guide plate, the second part extends from the edge of the first part and is inclined with the first part, and is located between the side wall and the side surface.

4. The backlight module according to claim 1, wherein: The side wall is integrally formed with the body, and the side wall is bent in a direction away from the body and is vertically arranged with respect to the body.

5. The backlight module according to claim 4, characterized in that: A reflective sheet is further included, and the reflective sheet is disposed between the body and the bottom surface of the light guide plate.

6. The backlight module according to claim 4, characterized in that: It further comprises a plastic frame, which is arranged between the at least one side surface and the side wall and located on the main body, and the contact surface of the plastic frame contacting the at least one side surface is an inclined surface.

7. The backlight module according to claim 6, wherein: The plastic frame includes a receiving groove, and the receiving groove receives the side wall.

8. The backlight module according to claim 6, wherein: The number of the at least one side surface is three, and the number of contact surfaces of the rubber frame contacting the at least one side surface is three.

9. The backlight module according to claim 1, wherein: It further includes an optical film, which is disposed on the light guide plate.

10. A display, characterized in that: include: The backlight module according to any one of claims 1 to 9; as well as The display panel is arranged on the backlight module.

11. The display according to claim 10, characterized in that The optical film is located between the light guide plate and the display panel.

12. The display according to claim 10, characterized in that There are multiple backlight modules, and there is one optical film. The optical film covers the multiple backlight modules.

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