Display module, frame thereof, backlight module and display device

Abstract

The invention discloses a frame of a display module, a backlight module, the display module and a display device. The frame of the display module in one embodiment comprises a main body surrounding the peripheral side of a display panel, a plurality of grooves are formed in the first side wall, facing the peripheral side, of the main body, the grooves are in the shapes of right-angle triangular pyramids, and the bottom faces of the right-angle triangular pyramids are openings of the grooves. According to the frame, the right-angle triangular pyramid grooves are formed in the side wall facing the peripheral side of the display panel surrounded by the frame, so that light incident to the side wall from the peripheral side of the display panel can be reflected by the grooves and then emerges in the direction parallel to the incident light, and it is avoided that the light leaks and is perceived by human eyes.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies. More specifically, it relates to a frame of a display module, a backlight module, a display module, and a display device. Background Art

[0002] Products using a backlight module for image display are widely applied in display devices. A display device may include a backlight module and a liquid crystal display panel. After the liquid crystal display panel is pasted to the backlight module, there is a problem of visible edge light leakage that can be observed in a dark environment. Summary of the Invention

[0004] An object of the present disclosure is to provide a frame of a display module, a backlight module, a display module, and a display device to solve at least one of the problems existing in the prior art.

[0005] To achieve the above object, the present disclosure adopts the following technical solutions:

[0006] In a first aspect of the present disclosure, there is provided a frame of a display module. The display module includes a display panel.

[0007] The frame includes a main body surrounding the outer peripheral side of the display panel.

[0008] Wherein, a plurality of grooves are provided on a first side wall of the main body facing the outer peripheral side. The shape of the groove is a right triangular pyramid shape, and the bottom surface of the right triangular pyramid is the opening of the groove.

[0009] Optionally, the first side wall includes a first region, and a plurality of grooves arranged in an array are provided in the first region.

[0010] The orthographic projection of the first region on the first side wall covers the orthographic projection of the outer peripheral side on the first side wall.

[0011] Optionally, a first distance is provided between the orthographic projection of the first region on the first side wall and the orthographic projection of the outer peripheral side on the first side wall.

[0012] The first distance is greater than or equal to the gap distance between the first side wall and the outer peripheral side.

[0013] Optionally, the ratio of the depth of the groove in the direction perpendicular to the first side wall to the thickness in the direction is greater than or equal to 1 / 4 and less than or equal to 1 / 3.

[0014] Optionally, the first side wall includes a plurality of grooves arranged in an array.

[0015] The distance between the openings of adjacent grooves is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0016] Optionally, the bottom surface of the right triangular pyramid is an equilateral triangle or an isosceles triangle.

[0017] Optionally, the first sidewall includes a plurality of grooves arranged in an array,

[0018] and the lengths of the adjacent opening sides of adjacent grooves are equal and parallel to each other.

[0019] A second aspect of the present disclosure provides a backlight module, including: a backplate, an optical film layer, and the frame described above,

[0020] and the main body at least further surrounds the outer peripheral side of the optical film layer to accommodate it inside the main body.

[0021] Optionally, the backlight module further includes: a backlight source, which is disposed between the backplate and the optical film layer to emit light towards the optical film layer.

[0022] A third aspect of the present disclosure provides a display module, including:

[0023] the backlight module described above, and

[0024] a display panel, which is disposed on the light-emitting side of the optical film layer away from the backplate to receive light from the optical film layer.

[0025] A fourth aspect of the present disclosure provides a display device, and the display device includes the display module described above.

[0026] The beneficial effects of the present disclosure are as follows:

[0027] In view of the existing problems, the present disclosure provides a frame, a backlight module, a display module, and a display device of a display module. By providing a plurality of regular triangular pyramid-shaped grooves on the first sidewall of the frame facing the display panel, the light incident on the first sidewall from the outer peripheral side of the display panel can be reflected by the grooves and exit in a direction parallel to the incident light, avoiding the leakage of light and being detected by the human eye, improving the edge light leakage problem in the dark state environment, and having a wide application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following further describes in detail the specific embodiments of the present disclosure with reference to the drawings.

[0029] Figure 1 A schematic structural diagram of a display module showing the related art;

[0030] Figure 2 A physical diagram of a display product showing light leakage problems;

[0031] Figure 3 A schematic diagram of a display module according to an embodiment of the present disclosure;

[0032] Figure 4Shows a top view of the first side wall in the frame according to an embodiment of the present disclosure;

[0033] Figure 5 Shows the reflection principle diagram of light incident on two perpendicular surfaces;

[0034] Figure 6 Shows the reflection principle diagram of light incident on the groove in the frame according to an embodiment of the present disclosure;

[0035] Figure 7 Shows a schematic cross-sectional view of the frame according to an embodiment of the present disclosure;

[0036] Figure 8 Shows a schematic cross-sectional view of the frame according to another embodiment of the present disclosure;

[0037] Figure 9 Shows according to Figure 8 a top view of the first side wall in the frame of the embodiment of. Detailed implementation manners

[0038] To illustrate the present disclosure more clearly, the present disclosure will be further described below in conjunction with embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present disclosure.

[0039] In the description of the present disclosure, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0040] Referring to Figure 1 as shown, the backlight module includes a back plate, an optical film layer disposed on the back plate, and a frame at least surrounding the optical film layer. The frame and the back plate together support the optical film layer and other structures in the module and define each structure in its corresponding position through the frame. In addition, the display panel is usually adhered to the light-emitting side of the backlight module through a foam adhesive to receive the frame from the optical film layer. After assembling the display panel and the backlight module, the frame also surrounds the outer peripheral side of the display panel to protect the display panel.

[0041] The inventor has found through research that, referring to Figure 1 As shown, since the liquid crystal display panel is made based on a glass substrate, the light emitted by the backlight module through the optical film layer is incident on the glass substrate and the liquid crystal deflected within the liquid crystal display panel displays an image from the light-emitting surface of the display panel facing away from the optical film layer. Most of the incident light is within the viewable angle range, while a small portion of the large-angle light reaches the outer peripheral side of the display panel near the frame through total internal reflection within the glass substrate and is emitted to the side wall of the frame. Since it is impossible for the display panel and the frame to be completely tightly attached, that is, there is a gap between the two, this part of the light emitted from the outer peripheral side of the display panel reaches the side wall of the frame and is reflected by its surface, thus leaking to the outside and then entering the human eye, being detected by the user viewing the display panel (for the specific optical path, see Figure 1 ). Figure 2 The figure shows a physical diagram of edge light leakage between the display panel and the frame. As can be seen from the figure, a bright line can be identified between the outer side of the lit display area and the black frame, and this edge light leakage defect is particularly obvious in a dark environment, affecting the user experience of the display product.

[0042] To solve at least one of the above problems, an embodiment of the present disclosure provides a frame for a display module. The display module includes a display panel,

[0043] The frame includes a main body surrounding the outer peripheral side of the display panel,

[0044] Wherein, a plurality of grooves are provided on the first side wall of the main body facing the outer peripheral side, and the shape of the grooves is a right triangular pyramid shape, and the bottom surface of the right triangular pyramid is the opening of the groove.

[0045] In this embodiment, by providing a plurality of regular triangular pyramid-shaped grooves on the first side wall of the frame facing the display panel, the light incident on the first side wall from the outer peripheral side of the display panel can be reflected by the grooves and then emitted in a direction parallel to the incident light, avoiding the light from leaking out and being detected by the human eye, and improving the edge light leakage defect in a dark environment.

[0046] The following describes the frame structure of the embodiment of the present disclosure with reference to the specific examples shown in the drawings.

[0047] Referring to Figure 3 As shown, the figure shows a frame 10 applied to a display module, where the display module includes a display panel 20. The frame 10 includes a main body surrounding the outer peripheral side of the display panel 20 to provide a supporting force and a protective effect to the display panel 20, and at the same time can also play a light-shielding effect. The frame 10 can be a glue frame, such as a thermoplastic material such as polycarbonate (PC) or polymethyl methacrylate (PMMA), and can be formed by an injection molding process. Of course, the present disclosure is not limited to this, and other material frames that can provide similar supporting and protective effects are also within the scope of protection of the present disclosure.

[0048] Referring to Figure 3 as shown, the display module applying the framework 10 of the present disclosure may further include a backlight part, and the backlight part may include: a back plate 31 and an optical film layer 32. The optical film layer 32 can be used to perform processes such as diffusing and homogenizing the light incident thereon. The backlight part may further include a backlight source (not shown). According to different incident positions of the light incident on the optical film layer 32, the backlight source can be a side-in type backlight source or a direct-lit type backlight source. When the backlight source is a side-in type backlight source, the backlight source can be a light strip arranged on the side of the optical film layer. The optical film layer 32 may further include a light guide plate. The light emitted by the side-in type backlight source is incident into the light guide plate of the optical film layer 32, and through the refraction, reflection, etc. of the light guide plate, the light is converted into a uniform surface light source and incident on the display panel 20. When the backlight source is a direct-lit type backlight source, the backlight source can be arranged between the optical film layer 32 and the back plate 31. The back plate 31 is used to provide support for the optical film layer 32, the backlight source, etc.

[0049] Continuing to refer to Figure 3 as shown, the framework 10 at least surrounds the outer peripheral side of the optical film layer 32. In this example, the framework 10 also surrounds the outer peripheral side of the back plate 31. By defining the position of the back plate 31, the positions of the optical film layer 32 and the backlight source are further defined through the support of the back plate 31.

[0050] According to the shape of the display panel 20, the main body of the framework 10 includes a first side wall 11 facing the outer peripheral side. Specifically, the main body of the framework 10 includes a plurality of borders corresponding to the outer peripheral side of the display panel 20, and the plurality of borders enclose together to form a surrounding of the outer peripheral side of the display panel 20. For example, if the light-emitting surface of the display panel 20 is rectangular, its outer peripheral side includes four sides, and the main body of the framework 10 includes 4 borders. Referring to Figure 3 as shown, the part of each border facing the outer peripheral side of the display panel 20 is the first side wall 11.

[0051] Particularly, referring to Figure 4 as shown, a plurality of grooves 101 are provided on the first side wall 11, and the shape of the grooves 101 is a right triangular pyramid shape, and the bottom surface of the right triangular pyramid is the opening of the groove.

[0052] To understand the function of this structure, the reflection principle of the grooves 101 on the light is described below in combination with Figure 5 and Figure 6 the optical path diagrams.

[0053] Figure 5Two vertically arranged reflecting surfaces, surface A and surface B, are shown. The dotted lines perpendicular to surface A and surface B in the figure represent the normal lines of the corresponding planes. Light is incident on surface B at an incident angle α1 and is reflected by surface B to form a first reflected ray. The angle between the first reflected ray and surface B is β1. The first reflected ray is further incident on surface A at an incident angle β2 and is reflected by surface A to form a second reflected ray and exit.

[0054] According to geometric relations, since surface A and surface B are perpendicular, the normal line of surface A is perpendicular to surface A, so the normal line of surface A is parallel to surface B, and β2 = β1; similarly, the normal line of surface B is also parallel to surface A, so the normal line of surface A is perpendicular to the normal line of surface B, and thus α2 = α1. Therefore, for two mutually perpendicular reflecting surfaces, the outgoing light is parallel to the outgoing light after being reflected by these two reflecting surfaces. In other words, for two mutually perpendicular reflecting surfaces, the reflected light, incident light, and normal line are in the same plane. Two mutually perpendicular reflecting surfaces form a normal plane. For light incident at any angle within the normal plane, it will be reflected back in a direction parallel to the incident light through the side walls.

[0055] Furthermore, referring to Figure 6 as shown, when three reflecting surfaces, surface A, surface B, and surface C, are provided and the enclosed internal space forms a right triangular pyramid with the reflecting surfaces perpendicular to each other in pairs, then for light incident at any angle within its internal space, it will surely form a reflected ray and exit in a direction parallel to the incident direction.

[0056] With this setting, referring to Figure 4 and Figure 3 as shown, when the first side wall 11 includes a plurality of grooves 101 in the shape of right triangular pyramids, and the bottom surface of the right triangular pyramid is the opening of the groove 101, the inner walls of each groove 101 form reflecting surfaces perpendicular to each other in pairs. Thus, the light exiting from the outer peripheral side of the display panel 20 will be reflected in a direction parallel to the incident light after entering the groove 101, and no large-angle reflected light towards the human eye will be formed, thereby avoiding the problem of light leakage at the edge of the display panel.

[0057] Optionally, referring to Figure 3 and Figure 4 as shown, the first side wall includes a first region. The first region is provided with a plurality of grooves 101 arranged in an array, and the orthographic projection of the first region on the first side wall 11 covers the orthographic projection of the outer peripheral side of the display panel 20 on the first side wall 11.

[0058] Of course, those skilled in the art should understand that the projection relationship between the first region and the outer peripheral side of the display panel 20 is intended to define the relationship between the two after the display panel 20 is adhered to the main body of the frame 10. From the perspective of the manufacturing process, the designer can correspondingly design and manufacture the size and position of the first region on the first sidewall 11 according to the size of the outer peripheral side of the display panel 20 to be adhered to the frame 10, the thickness of the foam cotton used for adhesion, and the relative position between the display panel 20 and the first sidewall.

[0059] With the above settings, more light emitted from the outer peripheral side of the display panel 20 can be incident into the groove 101, so that no edge light leakage that can be detected by the human eye will occur.

[0060] Optionally, referring to Figure 3 as shown, the perpendicular distance between the orthographic projection of the first region on the first sidewall 11 and the orthographic projection of the outer peripheral side on the first sidewall 11 is the first distance d1, and the first distance d1 is greater than or equal to the clearance distance d2 between the first sidewall 11 and the outer peripheral side.

[0061] With this setting, it can be ensured that the light emitted from the outer peripheral side of the display panel 20 is incident into the first region, thereby effectively avoiding the edge light leakage problem of the display panel.

[0062] Optionally, referring to Figure 7 as shown, the ratio of the depth of the groove 101 in the direction perpendicular to the first sidewall 11 to the thickness of the main body in this direction is greater than or equal to 1 / 4 and less than or equal to 1 / 3.

[0063] With this setting, while improving the edge light leakage problem, it can ensure the strength of the frame main body structure and control the process cost of the frame main body structure.

[0064] In principle, when a groove is provided on the first sidewall and the bottom surface of the groove is open, if it is large enough, it can ensure that the light incident from the display panel 20 into the groove can be emitted in the opposite direction parallel to the incident direction, thereby achieving the effect of avoiding edge light leakage. However, the smaller the number of grooves opened, the greater the depth of the grooves, and correspondingly, it is necessary to increase the thickness and size of the frame column main body or reduce the strength of the frame main body.

[0065] Therefore, referring to Figure 4 as shown, the first sidewall 11 includes a plurality of grooves 101 arranged in an array, and the designer can comprehensively consider the depth of the grooves 101, the strength of the frame main body, and the size of the frame main body to set the number of grooves 101.

[0066] In addition, referring to Figure 4As shown, when multiple grooves 101 are arranged in an array, when light enters the grooves 101, it can be ensured that after being reflected by the surface inside the grooves 101, it exits in a direction parallel to the incident light. However, the flat areas between the grooves 101 do not have this function. Therefore, the closer the grooves 101 are arranged, the smaller the area between adjacent grooves 101, and the better the effect of improving edge light leakage.

[0067] Optionally, the distance d3 between the openings of adjacent grooves 101 is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

[0068] With this setting, considering the processing accuracy and process cost, it can be ensured that as much light as possible can enter the grooves 101. At the same time, when this distance range is satisfied, when viewing the picture presented on the display panel, even in a dark environment, edge light leakage defects will not be noticed.

[0069] Continue to refer to Figure 4 As shown, an example of the array arrangement of multiple grooves 101 is presented in the figure. The bottom surface of the groove 101 is triangular. When the openings of the grooves 101 are arranged in an alternating positive and negative triangular manner, the grooves 101 can be closely arranged in two rows extending along the first direction X and arranged along the second direction Y.

[0070] Optionally, the bottom surface shapes and sizes of the multiple grooves 101 are equal to ensure that the grooves 101 can be closely arranged.

[0071] In this example, the bottom surface of the right triangular pyramid is an equilateral triangle, so each side of the bottom surface has the same length. Referring to Figure 7 In the cross-sectional view, when the bottom surface of the right triangular pyramid is an equilateral triangle, the cross-section of the groove 101 is an isosceles right triangle. Exemplarily, Figure 7 The cross-section is taken along the Figure 4 line AA' in

[0072] In some other alternative embodiments, referring to Figure 8 and Figure 9 as shown, the cross-section of the groove 101 perpendicular to the first side wall 11 is a non-isosceles right triangle, or rather, the right vertex of the right triangular pyramid is inclined towards one side. In this case, the bottom surface of the right triangular pyramid is an isosceles triangle. Exemplarily, Figure 8 The cross-section is taken along the Figure 9 line AA' in

[0073] With this setting, regardless of whether the bottom surface of the groove 101 in the shape of a right triangular pyramid is an equilateral triangle or an isosceles triangle, a close arrangement can be ensured, thereby effectively avoiding edge light leakage defects.

[0074] Based on the same inventive concept, embodiments of the present disclosure further provide a backlight module. Referring to Figure 3 as shown, the backlight module includes:

[0075] a back plate 31, an optical film layer 32, and the frame 10 described in the above embodiments. At least the main body of the frame further surrounds the outer peripheral side of the optical film layer 32 to accommodate it inside the main body.

[0076] Since the frame included in the backlight module provided by the embodiments of the present disclosure is the same as the frames provided by the above several embodiments, the previous implementation manners are also applicable to the structure provided by this embodiment, and will not be described in detail in this embodiment.

[0077] In the embodiments of the present disclosure, a backlight module with the above frame is provided, so that when the backlight module is assembled with the display panel, edge light leakage can be avoided, and the application experience of the display product can be improved.

[0078] Referring to Figure 3 as shown, the optical film layer 32 may include one or more stacked layers for diffusing and homogenizing the incident light. The frame 10 surrounds the optical film layer 32 to provide support for its edge.

[0079] Referring to Figure 3 as shown, the back plate 31 is disposed on the side of the optical film layer 32 away from the light-emitting surface for protecting the optical film layer 32 and providing support for it. The optical film layer 32 may be adhered to the back plate 31 through an adhesive layer such as optical glue.

[0080] Optionally, the backlight module further includes a backlight source disposed between the back plate 31 and the optical film layer 32 to emit light to the optical film layer 32. It can be understood that in this case, the backlight source is a direct-type backlight source, and the back plate 31, the backlight source, and the optical film layer 32 are stacked.

[0081] It should be noted that the present disclosure is not limited thereto. The type of the backlight source can also be side-injection type. In this case, the backlight source can be a light strip or other linear light source disposed on at least one side of the optical film layer 32, and the backlight source can be disposed in the cavity formed by the back plate 31, the optical film layer 32, and the frame 10. When the type of the backlight source is side-injection type, the optical film layer 32 may further include a light guide plate, and the light guide plate refracts and reflects the incident light to convert the light into a uniform surface light source for incident on the display panel.

[0082] It should also be noted that the present disclosure does not aim to limit the light source type of the backlight, which can be an Organic Light Emitting Diode (OLED for short), a Quantum Dot Light Emitting Diode (QLED for short), a Micro Light Emitting Diode (Micro LED for short), etc.

[0083] Based on the same inventive concept, referring to Figure 3 As shown, an embodiment of the present disclosure further provides a display module, including: the backlight module described in the above embodiments, and a display panel 20. The display panel is disposed on the light-emitting side of the optical film layer 32 away from the backplane 31 to receive light from the optical film layer 32. The display panel is a structure for displaying an image using the light in the backlight module. For example, it can be a liquid crystal display panel.

[0084] Optionally, the display panel can be fixed to the frame in the backlight module through an adhesive layer such as foam tape (the black square part in the figure).

[0085] Since the backlight module included in the display module provided by the embodiment of the present disclosure has the same structure as that provided in the above several embodiments, the previous implementation manners are also applicable to the structure provided in this embodiment and will not be described in detail in this embodiment.

[0086] In the embodiment of the present disclosure, a display module with the above backlight module is provided. Thus, when the backlight module and the display panel are assembled, the light emitted from the outer peripheral side of the display panel can be emitted in a direction parallel to the incident light through the reflection of the groove in the frame, so that the reflected light will not enter the viewer's eyes, avoiding the light leakage defect at the edge of the display module and improving the application experience of the display product.

[0087] Based on the same inventive concept, an embodiment of the present disclosure further provides a display device, which is the display module described in the above embodiments.

[0088] In this embodiment, the display device can be any display product or component such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, an in-vehicle display, a digital photo frame, or a navigator, especially a display device that provides a light source for image display through the backlight module. By loading the above display module, the display device can avoid the light leakage defect at the edge of the display panel and improve the viewing experience.

[0089] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, rather than limitations on the implementation manners of the present disclosure. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is impossible to list all implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present disclosure still fall within the protection scope of the present disclosure.

Claims

1. A frame of a display module, characterized in that: The display module includes a display panel. The frame includes a main body surrounding the outer peripheral side of the display panel, Wherein, a plurality of grooves are arranged on the first side wall of the main body facing the outer peripheral side, and the shape of the grooves is a right-angled triangular pyramid, and the bottom surface of the right-angled triangular pyramid is the opening of the groove.

2. The frame according to claim 1, characterized in that The first side wall includes a first area, and the first area is provided with a plurality of grooves arranged in an array. An orthographic projection of the first region on the first side wall covers an orthographic projection of the outer peripheral side on the first side wall.

3. The frame according to claim 2, characterized in that A first distance is between an orthographic projection of the first area on the first side wall and an orthographic projection of the outer peripheral side on the first side wall, The first distance is greater than or equal to a gap distance between the first side wall and the outer peripheral side.

4. The frame according to claim 1, characterized in that A ratio of a depth of the groove in a direction perpendicular to the first side wall to a thickness of the main body in the direction is greater than or equal to 1 / 4 and less than or equal to 1 / 3.

5. The frame according to claim 1, characterized in that The first side wall includes the plurality of grooves arranged in an array, The distance between the openings of adjacent grooves is greater than or equal to 0.3 mm and less than or equal to 0.5 mm.

6. The frame according to claim 1, characterized in that The bottom surface of the right triangular pyramid is an equilateral triangle or an isosceles triangle.

7. The frame according to claim 1, characterized in that The first side wall includes the plurality of grooves arranged in an array, Adjacent opening sides of adjacent grooves are of equal length and are arranged in parallel.

8. A backlight module, characterized in that: include: A back panel, an optical film layer, and a frame according to any one of claims 1 to 7, The main body also surrounds at least the outer peripheral side of the optical film layer to accommodate it inside the main body.

9. The backlight module according to claim 8, characterized in that: Also includes: A backlight source is disposed between the back plate and the optical film layer to emit light toward the optical film layer.

10. A display module, characterized in that: include: The backlight module according to claim 8 or 9, and The display panel is arranged on the light-emitting side of the optical film layer away from the back plate to receive the light from the optical film layer.

11. A display device, characterized in that: The display device comprises the display module according to claim 10.

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