Backlight module and display device

Abstract

The present invention discloses a backlight module and a display device. The backlight module includes: a main body; a through hole, which penetrates the main body along a first direction, and the first direction is perpendicular to the light-emitting surface of the backlight module; a frame structure, which is at least partially located in the through hole; the frame structure includes at least two sub-frames that are sequentially ringed; a light-guiding channel is formed between any two adjacent sub-frames, and the entrance of the light-guiding channel faces the side wall of the through hole, and the exit of the light-guiding channel faces the light-emitting surface of the backlight module. In the present application, the thickness of a single sub-frame along the second direction is relatively thin, and no "black line" will appear when the display device displays normally; at the same time, the light-guiding channel formed between adjacent sub-frames can conduct vertical directional guidance of light, thereby improving the light leakage phenomenon. The above scheme is adopted to improve the display effect of the display device and the photosensitivity effect of the electronic photosensitive device.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of display technology, and in particular to a backlight module and a display device. Background Art

[0002] With the development of display technology, full-screen technology has emerged, and such technology has been widely used in various electronic devices such as mobile phones. In a full-screen display device, it is usually necessary to place an electronic photosensitive device (such as a camera) in the effective display area of ​​the display device, so it is necessary to dig a hole in the corresponding effective display area when designing the display module of the display device, and the electronic photosensitive device is set in the hole area. However, in existing display devices, there are problems of light leakage in the hole area and poor quality when displaying in the effective display area. Summary of the invention

[0003] In view of this, the present invention provides a backlight module and a display device to improve the light leakage phenomenon in the hole area, and at the same time enhance the display effect of the display device and the photosensitivity effect of the electronic photosensitive device.

[0004] In a first aspect, an embodiment of the present invention provides a backlight module, comprising:

[0005] Main body;

[0006] A through hole, passing through the main body along a first direction, wherein the first direction is perpendicular to the light emitting surface of the backlight module;

[0007] A frame structure is at least partially located in the through hole; the frame structure includes at least two sub-frames which are sequentially ring-shaped; a light guide channel is formed between any two adjacent sub-frames, the entrance of the light guide channel faces the side wall of the through hole, and the exit of the light guide channel faces the light emitting surface of the backlight module.

[0008] In a second aspect, an embodiment of the present invention further provides a display device, comprising a display panel and the backlight module described in the first aspect of the present invention; the display panel is arranged on the light emitting side of the backlight module.

[0009] The backlight module provided by the embodiment of the present invention includes: a main body; a through hole, which passes through the main body along a first direction, and the first direction is perpendicular to the light-emitting surface of the backlight module; a frame structure, which is at least partially located in the through hole; the frame structure includes at least two sub-frames that are sequentially ringed; a light-guiding channel is formed between any two adjacent sub-frames, and the entrance of the light-guiding channel faces the side wall of the through hole, and the exit of the light-guiding channel faces the light-emitting surface of the backlight module. With the above technical solution, the thickness of a single sub-frame along the second direction is relatively thin, and no "black line" will appear when the display device displays normally. In addition, the thickness of the frame structure as a whole along the second direction increases, which enhances the ability of the frame structure to block light horizontally; at the same time, the light-guiding channel formed between adjacent sub-frames can conduct vertical directional guidance of light, thereby effectively improving the light leakage problem, so that the display effect of the display device and the photosensitivity effect of the electronic photosensitive device are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 and Figure 2 A schematic diagram of the structures of two display devices in the related art provided by an embodiment of the present invention;

[0011] Figure 3 A schematic diagram of the structure of a backlight module provided by an embodiment of the present invention;

[0012] Figure 4 A schematic diagram of a framework structure provided by an embodiment of the present invention;

[0013] Figure 5 for Figure 4 A top view of the frame structure shown;

[0014] Figure 6 A light propagation path diagram provided by an embodiment of the present invention;

[0015] Figure 7 A schematic structural diagram of another backlight module provided by an embodiment of the present invention;

[0016] Figure 8 and Fig. 9 Structural schematic diagrams of two other frame structures provided by embodiments of the present invention;

[0017] Fig.10 for Figure 8 A top view of the frame structure shown;

[0018] Fig.11 for Fig. 9 A top view of the frame structure shown;

[0019] Fig.12 A top view of a frame structure provided by an embodiment of the present invention;

[0020] Fig.13 A schematic structural diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0022] Taking the electronic photosensitive device as the camera as an example, the full-screen display device generally adopts the camera under the screen (Camera Under Panel, CUP) technology. CUP technology refers to a technology that hides the camera under the display panel without affecting the overall display effect of the display panel. Figure 1 and Figure 2 The schematic diagram of the structure of two display devices in the related art provided by the embodiment of the present invention is shown in FIG. Figure 1 and Figure 2 The display device includes a backlight module 20 and a display panel 6. Some through holes 2 in the backlight module 20 correspond to the camera under panel (CUP) area of ​​the display panel. CUP technology needs to achieve compatibility between the camera and display functions. When the camera function is turned on, the CUP area does not display but only transmits light; when the camera function is not turned on, the CUP area can display normally. Among them, the backlight module 20 is also provided with a frame structure 3 as shown in the figure, which plays the role of support, protection and fixation. Figure 1 In the display device shown in FIG. 1 , light emitted by a backlight source (not shown in the figure) easily leaks from the edge of the frame structure 3 to the CUP area (such as Figure 1 The dotted arrow in the middle indicates light leakage), and the camera 7 is easily affected by light leakage and cannot take pictures normally. Figure 2 In the display device shown, light leakage is avoided by increasing the thickness of the frame structure 3 in the horizontal direction or filling the edge with black light-shielding glue a. However, under this setting, "black lines" are likely to appear during normal display, affecting the display effect of the display device.

[0023] Based on the above problems, the present application provides a backlight module, including:

[0024] Main body;

[0025] A through hole, passing through the main body along a first direction, wherein the first direction is perpendicular to the light emitting surface of the backlight module;

[0026] A frame structure is at least partially located in the through hole; the frame structure includes at least two sub-frames which are sequentially ring-shaped; a light guide channel is formed between any two adjacent sub-frames, the entrance of the light guide channel faces the side wall of the through hole, and the exit of the light guide channel faces the light emitting surface of the backlight module.

[0027] By adopting the above technical solution, the thickness of a single subframe along the second direction is relatively thin, and no "black line" will appear when the display device is displaying normally. In addition, the thickness of the overall frame structure along the second direction is increased, which enhances the ability of the frame structure to block light horizontally; at the same time, the light-guiding channel formed between adjacent subframes can guide light in a vertical direction, thereby effectively improving the light leakage problem, thereby improving the display effect of the display device and the photosensitivity of the electronic photosensitive device.

[0028] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Figure 3 A schematic diagram of the structure of a backlight module provided by an embodiment of the present invention, referring to Figure 3 The backlight module 20 includes: a main body 1; a through hole 2, which penetrates the main body 1 along a first direction X, and the first direction X is perpendicular to the light-emitting surface of the backlight module 20; a frame structure 3, which is at least partially located in the through hole 2; the frame structure 3 includes at least two sub-frames 4 which are sequentially ringed; a light guide channel 5 is formed between any two adjacent sub-frames 4, and the entrance of the light guide channel 5 faces the side wall of the through hole 2, and the exit of the light guide channel 5 faces the light-emitting surface 10 of the backlight module 20.

[0030] Specifically, Figure 3 As shown, in the present application, the backlight module 20 includes a main body 1, and the main body 1 can be understood as the main structure of the backlight module 20 including a backlight source (not shown in the figure) and a light guide film layer, etc. Figure 3 The main body 1 shown in the figure can be a light guide film layer. A part of the main body 1 is penetrated by the through hole 2. One side of the main body 1 is subsequently attached to the display panel 6, and the surface of the side where the main body 1 and the display panel 6 are attached is the light emitting surface 10 of the backlight module 20. The direction perpendicular to the light emitting surface 10 of the backlight module can be defined as the first direction X, and the direction along the first direction X is defined as the second direction X. Figure 3 In the orientation shown, the first direction X is the vertical direction, the through hole 2 penetrates the main body 1 along the first direction X, and the upper surface of the main body 1 is the light emitting surface 10 of the backlight module 20 .

[0031] Continue to refer Figure 3, the frame structure 3 is arranged in the through hole 2 along the side wall of the through hole 2, and the frame structure 3 can play the role of support, fixation and protection. It is worth mentioning that in the present application, the frame structure 3 is composed of at least two sub-frames 4 that are ringed in sequence. In other words, the frame structure 3 as a whole is a multi-layer hollow structure, and there is a gap between any two adjacent sub-frames 4, and the gap is the light guide channel 5. The center of the frame structure 3 is a hollow area, and the hollow area can correspond to the CUP area of ​​the display device, and the electronic photosensitive device 7 can be arranged in the hollow area or in the area covered by the projection of the hollow area along the vertical direction (the first direction X or the opposite direction of the first direction X).

[0032] Furthermore, one side edge of the sub-frame 4 faces the side wall of the through hole 2, and the other side edge faces the light emitting side of the backlight module 20, that is, toward the side of the display panel 6; so that one side entrance of the light guide channel 5 faces the side wall of the through hole 2, and the other side exit faces the light emitting surface 10 of the backlight module 20.

[0033] The radial direction of the through hole 2 can be defined as the second direction Y, the second direction Y is perpendicular to the first direction X, and the second direction Y is parallel to the light emitting surface 10 of the backlight module 20. Figure 3 In the orientation shown, the second direction Y may refer to the horizontal direction. One point that needs to be explained is that the second direction Y may be any direction parallel to the light emitting surface 10 of the backlight module 20. For the main body 1 on the left side of the through hole 2 in the figure, the second direction Y may refer to the horizontal direction from left to right. For the main body 1 on the right side of the through hole 2 in the figure, the second direction Y may refer to the horizontal direction from right to left. Under this setting, the overall thickness of the frame structure 3 along the second direction Y increases, thereby enhancing the ability of the frame structure 3 to block light horizontally. In addition, since a light guiding channel 5 is formed between adjacent sub-frames 4, the light emitted by the backlight source along the second direction Y (or close to the second direction Y) and directed toward the side wall of the through hole 2 (such as Figure 3 The light (shown by the black dotted arrow in the middle) can enter the light guide channel 5 after passing through the side wall of the through hole 2, and then be emitted to the light exit surface 10 of the backlight module 20 in a nearly vertical direction along the light guide path of the light guide channel 5 to achieve normal display. By directional guidance of the light in the vertical direction, it is possible to largely avoid the light from the backlight source entering the through hole 2 area inside the frame structure 3 during the camera function, thereby improving the light leakage problem and effectively improving the camera effect. In addition, the thickness of a single sub-frame 4 along the second direction Y can be set to be thinner, and when the display device is displaying normally, no "black line" will appear to avoid affecting the display effect of the CUP area.

[0034] The specific configuration of the backlight source and the light guide film layer can be configured by those skilled in the art according to actual needs, and the embodiments of the present invention do not elaborate on or limit this. For example, the backlight source can be configured as an edge light type or a direct light type, but is not limited thereto.

[0035] in addition, Figure 3 The frame structure 3 is exemplarily shown to include four annular sub-frames 4, and the actual arrangement is not limited thereto. Under this arrangement, the frame structure 3 forms a large number of light-guiding channels 5, and the light-guiding effect is better.

[0036] The backlight module provided by the embodiment of the present invention includes: a main body; a through hole, which penetrates the main body along a first direction, and the first direction is perpendicular to the light-emitting surface of the backlight module; a frame structure, which is at least partially located in the through hole; the frame structure includes at least two sub-frames that are sequentially annular; a light-guiding channel is formed between any two adjacent sub-frames, the entrance of the light-guiding channel faces the side wall of the through hole, and the exit of the light-guiding channel faces the light-emitting surface of the backlight module. With the above technical solution, the thickness of a single sub-frame along the second direction is relatively thin, and no "black line" will appear when the display device displays normally. In addition, the thickness of the frame structure as a whole along the second direction increases, which enhances the ability of the frame structure to block light horizontally; at the same time, the light emitted by the backlight source and directed toward the side wall of the through hole along the second direction can enter the light-guiding channel after passing through the side wall of the through hole, and then along the light-guiding path of the light-guiding channel, it is directed toward the light-emitting surface of the backlight module in a nearly vertical direction. The existence of the frame structure can directional guide the light in the vertical direction, thereby effectively improving the light leakage problem, so that the display effect of the display device and the photosensitivity effect of the electronic photosensitive device are improved.

[0037] The embodiment of the present invention does not limit the specific structure of the subframe 4, and those skilled in the art may configure it according to actual needs.

[0038] For example, Figure 4 A schematic diagram of a framework structure provided by an embodiment of the present invention, Figure 5 for Figure 4 The top view of the frame structure shown. Figure 3 to Figure 5 In a possible embodiment, the sub-frame 4 may include a first division 8 and a second division 9 that are connected to each other; the projection of the first division 8 along the first direction X is annular, and the first division 8 is parallel to the light emitting surface 10 of the backlight module 20; the second division 9 is cylindrical, and in the same sub-frame 4, the projection of the second division 9 along the first direction X is located within the projection of the first division 8 along the first direction X.

[0039] Specifically, Figure 3 to Figure 5 As shown, the subframe 4 may be composed of a first subsection 8 and a second subsection 9, the first subsection 8 is parallel to the light emitting surface 10 of the backlight module 20, and the projection of the first subsection 8 along the first direction X is annular. It can also be understood that the first subsection 8 is a planar annular shape along the second direction Y, and the first subsection 8 as a whole may be located in the through hole 2. Among them, along the second direction Y, the first subsection 8 may include a first side close to the side wall of the through hole 2 and a second side away from the side wall of the through hole 2.

[0040] Further, continue to refer to Figure 3 to Figure 5 The second sub-section 9 is cylindrical, and the extension direction of the cylindrical side wall of the second sub-section 9 is close to the first direction X. The cylindrical second sub-section 9 is at least partially sleeved in the through hole 2. Wherein, along the first direction X, the second sub-section 9 may include a third side close to the light emitting surface 10 of the backlight module 20 and a fourth side away from the light emitting surface 10. In the same sub-frame 4, the fourth side of the second sub-section 9 is connected to the second side of the first sub-section 8 to form an integrated sub-frame 4.

[0041] One thing that needs to be explained is that Figure 4 and Figure 5 Only the three-dimensional structure of the subframe 4 is shown, and the thickness of the subframe 4 is not shown. The actual subframe 4 should be as follows Figure 3 All shown have a certain thickness.

[0042] by Figure 3 to Figure 5 Taking the four sub-frames 4 shown in the figure as an example, the sub-frames 4 that are sequentially encircled from the center of the through hole 2 to the side wall of the through hole 2 can be defined as the first sub-frame 41, the second sub-frame 42, the third sub-frame 43 and the fourth sub-frame 44. As shown in the figure, the first sub-frames 8 of the first sub-frame 41, the second sub-frame 42, the third sub-frame 43 and the fourth sub-frame 44 are sequentially arranged along the first direction X, and the horizontal sub-frames of the light guide channel 5 are formed between the adjacent first sub-frames 8; the vertical sub-frames of the light guide channel 5 are formed between the adjacent encircled second sub-frames 9. The cylindrical inner wall of the second sub-frame 9 of the innermost first sub-frame 41 encloses the hollow area.

[0043] In this arrangement, for the edge-lit backlight source, the light transmitted along the side wall direction of the vertical through hole 2 can enter the horizontal division of the light-guiding channel 5 to a greater extent, and then enter the vertical division of the light-guiding channel 5 after the horizontal division, and finally emit in a direction nearly perpendicular to the light-emitting surface 10 of the backlight module 20. This effectively increases the luminous flux compensation in the vertical light-emitting direction of the backlight module 20, improves the display uniformity of the CUP area, and improves the display effect.

[0044] Optional, you can continue to refer to Figure 3-4 In a possible embodiment, it can be arranged that along the first direction X, the side wall of the second section 9 is inclined in a direction away from the side wall of the through hole 2 .

[0045] Specifically, in order to improve the light guiding effect, the second sub-section 9 of the sub-frame 4 may be arranged to be inclined, specifically, the side wall of the second sub-section 9 is inclined in the direction away from the side wall of the through hole 2 along the first direction X. That is, along the first direction X, the distance between the third side of the second sub-section 9 and the side wall of the through hole 2 is smaller than the distance between the fourth side and the side wall of the through hole 2. In the same sub-frame 4, the angle between the side walls of the first sub-section 8 and the second sub-section 9 is greater than 90 degrees.

[0046] Figure 6A light propagation path diagram provided by an embodiment of the present invention, referring to Figure 6 Under this arrangement, the light entering the horizontal division of the light-guiding channel 5 (as shown by the dotted arrow in the figure) can be reflected upward to a large extent after being reflected by the side wall of the second division 9, thereby preventing the light from entering the horizontal division again after passing through the side wall of the second division 9; and then the light entering the vertical division of the light-guiding channel 5 is reflected back and forth between the side walls of two adjacent second divisions 9, and finally emitted from the light-emitting surface 10 of the backlight module in a direction nearly vertical, thereby increasing the probability of vertical emission of the light.

[0047] In addition, it should be noted that the angle between the first section 8 and the second section 9 will affect the propagation effect of light. In actual application, technical personnel in this field can adjust the inclination angle of the second section 9 according to actual conditions to achieve a better light guiding effect.

[0048] Figure 3 to Figure 5 In the embodiment shown, the side walls of the second subsections 9 of adjacent subframes 4 can be parallel to each other. When the adjacent second subsections 9 are arranged in parallel, the widths of the corresponding first subsections 8 along the second direction Y are different, so as to ensure that the subframes 4 are mutually encircled and form a light guide channel 5. Figure 3 As shown, the widths of the first sections 8 of the sub-frames 4 arranged along the first direction X along the second direction Y decrease sequentially.

[0049] In other possible embodiments, the widths of the first subsections 8 of the subframes 4 along the second direction Y may be the same, and the inclination angles of the second subsections 9 corresponding to the first subsections 8 may be different, that is, the side walls of the adjacent second subsections 9 are not completely parallel. In actual application, those skilled in the art may set the sizes of the first subsections 8 and the second subsections 9 according to actual needs, and the embodiments of the present invention will not be described one by one.

[0050] Optionally, the embodiment of the present invention does not limit the specific setting shape of the second section 9, and those skilled in the art may set it according to actual needs. Any setting method of the cylindrical second section 9 that meets the use requirements is within the scope of the technical solution protected by the embodiment of the present invention.

[0051] Exemplarily, in a possible embodiment, the shape of the second section 9 may include at least any one of a cylindrical tube, a truncated cone tube, a prismatic tube and a prism-shaped tube.

[0052] Specifically, in the above embodiments, the second subsection 9 is a truncated cone-shaped cylinder, and the sidewall of the second subsection 9 has the same shape as the sidewall of the truncated cone structure, but the actual arrangement is not limited thereto. In other possible embodiments, the second subsection 9 may also be a cylindrical cylinder, a prismatic cylinder, or a prism-shaped cylinder.

[0053] The second section 9 of different shapes may also affect the light propagation effect. In actual application, those skilled in the art can also set the shape of the second section 9 according to actual conditions to achieve a better light guiding effect.

[0054] Of course, in other possible embodiments, the sub-frame 4 may be configured to consist of only a cylindrical structure, and the cylindrical side wall may be inclined to ensure the light guiding effect, which is helpful to simplify the preparation process of the sub-frame 4.

[0055] Optional, Figure 7 A schematic diagram of another backlight module provided by an embodiment of the present invention, referring to Figure 7 In a possible embodiment, the backlight module 20 may further include: a fixing frame 11 connected to the frame structure 3 and the main body 1 respectively, and the fixing frame 11 is used to fix the frame structure 3 and the main body 1.

[0056] Specifically, Figure 7 As shown, a fixed frame 11 may also be provided in the backlight module 20, and the fixed frame 11 is fixedly connected to the main body 1, and the fixed frame 11 supports, fixes and protects the main body 1. The fixed frame 11 is also fixedly connected to the frame structure 3, thereby fixing the frame structure 3 to the main body 1, and ensuring the fixing effect of the frame structure 3.

[0057] The specific configuration of the fixing frame 11 is not limited in the embodiment of the present invention, and those skilled in the art may configure it according to actual needs.

[0058] For example, please refer to Figure 7 In a possible embodiment, the fixed frame 11 may include a third division 12 and a fourth division 13 that are connected to each other; the third division 12 is cylindrical, and at least two sub-frames 4 are encircled by the third division 12; the fourth division 13 is parallel to the surface of the main body 1 on the side away from the light emitting surface 10 of the backlight module 20, and the fourth division 13 includes a light transmission hole 14, the edge of the light transmission hole 14 is connected to the third division 12, and the fourth division 13 extends to the side of the main body 1 away from the light emitting surface 10 of the backlight module 20 and is fixedly connected to the main body 1; the sub-frame 4 located most centrally among the at least two sub-frames 4 is fixedly connected to the portion of the fourth division 13 located between the third division 12 and the main body 1.

[0059] Specifically, Figure 7As shown, in the embodiment of the present application, the fixed frame 11 can be composed of a third division 12 and a fourth division 13. The third division 12 has the same shape as the second division 9 of the sub-frame 4 and can be set as a cylindrical structure. And the third division 12 is located at the innermost side of each cylindrical second division 9, that is, the second division 9 of the sub-frame 4 is looped on the outer side of the third division 12 of the fixed frame 11. The extension direction of the third division 12 can be the same as the first direction X. Among them, along the first direction X, the third division 12 includes a fifth side close to the light emitting surface 10 of the backlight module 20 and a sixth side away from the light emitting surface 10.

[0060] Further, the fourth division 13 may be parallel to the light emitting surface 10 of the backlight module 20. It can be understood that the overall extension direction of the main body 1 is parallel to the light emitting surface 10 of the backlight module 20. Therefore, the fourth division 13 may be parallel to the side surface of the main body 1 away from the light emitting surface 10 of the backlight module. Among them, a light-transmitting hole 14 is provided on the fourth division 13, and the sixth side of the third division 12 is connected to the edge of the light-transmitting hole 14, so that the third division 12 and the fourth division 13 are connected into an integral structure. The cylindrical inner wall of the third division 12 forms a light-transmitting portion, and the light-transmitting portion is connected to the light-transmitting hole 14. Along the first direction X, the light-transmitting hole 14 (light-transmitting portion) can be located in the hollow area at the center of the frame structure 3, and the external light can be collected by the electronic photosensitive device 7 after passing through the light-transmitting portion and the light-transmitting hole 14.

[0061] In other words, the third section 12 of the fixing frame 11 is located in the through hole 2, the fourth section 13 is located on the side of the main body 1 away from the light emitting surface 10 of the backlight module, and the first section 8 extends outwardly from the edge of the light-transmitting hole 14 in the horizontal direction. Figure 7 The fourth sub-portion 13 includes a first portion located between the third sub-portion 12 and the main body 1 along the first direction X and a second portion extending to a surface of the main body 1 that is away from the light emitting surface 10 of the backlight module. The first portion of the fourth sub-portion 13 can be fixed to the sub-frame 4 located at the center, and the second portion of the fourth sub-portion 13 can be fixed to the main body 1, thereby achieving the fixation of the main body 1 and the frame structure 3.

[0062] The embodiment of the present invention does not limit the fixing method of the fourth sub-portion 13 and the main body 1, and those skilled in the art can set it according to actual needs. For example, optical glue can be used for bonding, but it is not limited to this.

[0063] In addition, the fixing method of the fixed frame 11 and the sub-frame 4 is not limited thereto. In other possible embodiments, the third section 12 of the fixed frame 11 may be fixedly connected to the sub-frame 4, but is not limited thereto.

[0064] Optionally, in a possible embodiment, the fixed frame 11 and the centrally located sub-frame 4 of the at least two sub-frames 4 are an integral structure.

[0065] Specifically, as an optional embodiment, the fixing frame 11 and the innermost sub-frame 4 can be directly welded to form an integral structure, thereby improving the fixing effect of the fixing frame 11 and the frame structure 3 and improving the stability of the frame structure 3.

[0066] Of course, in other possible embodiments, the fixed frame 11 and the innermost sub-frame 4 can be fixed by a combination of connecting parts to improve the fixing flexibility and facilitate the replacement of the fixed frame 11 or the frame structure 3. In actual application, those skilled in the art can select the fixing method between the two according to actual needs, and the embodiment of the present invention is not limited to this.

[0067] In other embodiments not shown, the entire fixed frame 11 can be arranged to be located on the side of the main body 1 away from the light emitting surface 10 of the backlight module, that is, the fixed frame 11 only includes the fourth section 13. In this way, the difficulty of preparing the fixed frame 11 can be reduced, while the difficulty of installing the fixed frame 11 when it is fixed to the main body 1 is increased.

[0068] Optional, you can continue to refer to Figure 3 , the first sub-section 8 of the sub-frame 4 is located in the through hole 2 ; in the same sub-frame 4 , the side of the first sub-section 8 away from the second sub-section 9 is connected to the side wall of the through hole 2 .

[0069] Specifically, Figure 3 As shown, in the above embodiment, it is mentioned that the first subsection 8 of the subframe 4 can be located in the through hole 2 as a whole, and the first subsection 8 can include a first side and a second side, the first side is close to the side wall of the through hole 2, and the second side is connected to the second subsection 9. In this embodiment, the first side of the first subsection 8 can be further made to fit and connect to the side wall of the through hole 2. Under this setting mode, the entrance of the light guide channel 5 fits the side wall of the through hole 2, which can play a better light guiding effect on the light propagating horizontally in the main body 1.

[0070] Optional, continue to refer to Figure 3 In a possible embodiment, the length of the frame structure 3 along the first direction X may be set to be greater than or equal to the length of the main body 1 along the first direction X. In this arrangement, the third side of the second sub-portion 9 of the sub-frame 4 is flush with the upper surface of the main body 1 along the first direction X or is located above the upper surface of the main body 1, so that the exit of the light guide channel 5 is close to the display panel 6.

[0071] in, Figure 3 The length of the frame structure 3 along the first direction X is greater than the length of the main body 1 along the first direction X. Those skilled in the art can understand that when the backlight module 20 and the display panel 6 are subsequently assembled, they can be bonded together by an adhesive layer with a certain thickness, and the through hole 2 area of ​​the backlight module 20 is generally not provided with an adhesive layer. Figure 3In this arrangement, the exit of the light guide channel 5 can be ensured to be closer to the display panel 6, thereby improving the light guide effect.

[0072] In actual application, those skilled in the art may adjust the length of the frame structure 3 along the first direction X according to actual needs, and the embodiment of the present invention does not limit the specific value of the length.

[0073] Optionally, in the embodiment of the present application, the frame structure 3 may further include at least one connecting portion; the connecting portion is used to connect any two adjacent sub-frames 4.

[0074] Specifically, a connecting portion is further provided between any two adjacent sub-frames 4, and the connecting portion can fixedly connect the two sub-frames 4 of the annular sleeve to form a frame structure 3. The number and specific structure of the connecting portion can be set by those skilled in the art according to actual needs, and the embodiment of the present invention is not limited thereto. For example, the specific structure of the connecting portion is introduced in two optional ways below.

[0075] Exemplarily, the connecting portion may be a transparent connecting portion, and the transparent connecting portion at least partially fills the space between any two adjacent sub-frames 4 .

[0076] Specifically, OC or OCA optical glue may be used to form the transparent connection portion, and the optical glue may be filled between at least part of two adjacent sub-frames 4 . Figure 3 to Figure 5 The embodiment shown can be regarded as a transparent connection part filled between any two adjacent ring-shaped sub-frames 4, which is not marked in the figure due to its transparency. Any two adjacent sub-frames 4 are fixedly connected by the transparent connection part, which can improve the firmness of the sub-frames 4 and further improve the stability of the frame structure 3 while ensuring the light guiding effect of the light guiding channel 5.

[0077] Optional, Figure 8 and Fig. 9 The schematic diagrams of the structures of the other two frame structures provided by the embodiments of the present invention are as follows: Fig.10 for Figure 8 A top view of the frame structure shown, Fig.11 for Fig. 9 Top view of the frame structure shown. Figure 8 to Figure 11 In other possible embodiments, the connecting portion may be a non-transparent connecting portion 15 , and the non-transparent connecting portion 15 is used to connect the first sub-portions 8 and / or the second sub-portions 9 of any two adjacent sub-frames 4 .

[0078] Specifically, in the embodiment of the present application, any two adjacent sub-frames 4 may be connected by welding, and the non-transparent connection portion 15 is a welding structure between adjacent sub-frames 4. It should be noted that when the sub-frames 4 are connected by welding, the area of ​​the welding point is generally small, that is, the size of the non-transparent connection portion 15 is small, and will not have a significant impact on the propagation of light in the light guide channel 5.

[0079] For example, welding can be performed on the first subsection 8 of the subframe 4 (eg Figure 8 and Fig.10 As shown in FIG. 1 , the non-transparent connecting portion 15 is formed between two adjacent first sub-portions 8. In this configuration, the projection of the non-transparent connecting portion 15 in the first direction X is only a welding point, which hardly affects the propagation of light.

[0080] Alternatively, welding can be performed on the second subsection 9 of the subframe 4 (eg Fig. 9 and Fig.11 As shown in the figure, the non-transparent connection part 15 is formed between two adjacent second sub-parts 9. Since the second sub-parts 9 of the sub-frame 2 occupy a larger volume of the whole, welding on the second sub-parts 9 is conducive to improving the fixing strength between the sub-frames 4 and ensuring the stability of the frame structure 3. Of course, in other embodiments not shown, in order to improve the connection strength between the sub-frames 4, welding can also be performed between adjacent first sub-parts 8 and adjacent second sub-parts 8 at the same time.

[0081] In addition, if Figure 8 to Figure 11 As shown, in an optional embodiment, a non-transparent connection portion 15 may be provided so as to be symmetrically distributed with the central axis Z of the ring between the sub-frames 4 as the symmetry axis, so that the fixing strength between the sub-frames 4 can also be improved.

[0082] Above Figure 8 and Fig. 9 Only two optional welding methods of the sub-frames 4 are shown for example. In actual application, those skilled in the art can arbitrarily adjust the welding method between the sub-frames 4 according to actual conditions, and the embodiments of the present invention will not describe them in detail one by one.

[0083] Optional, you can continue to refer to Figure 8 and Fig. 9 In a possible embodiment, the frame structure 3 includes a plurality of sub-frames 4 which are sequentially nested, and a plurality of non-transparent connecting portions 15 connecting the plurality of sub-frames 4 are sequentially located on the same straight line.

[0084] Specifically, in this embodiment, the number of subframes 4 can be greater than 2 (for example, 4 subframes are shown in the figure, but not limited thereto). When the number of subframes 4 is 4, the number of non-transparent connecting parts 15 should be greater than or equal to 3. At this time, the non-transparent connecting parts 15 located between different subframes 4 can be sequentially arranged on the same straight line, and the projections of the non-transparent connecting parts 15 along the first direction X can be connected to form a straight line. In simple terms, the welding points between the 4 different subframes can constitute a welding line, and the welding line is welded to the multiple subframes 4 respectively.

[0085] In which, taking the frame structure 3 consisting of 4 sub-frames 4 as an example, when the number of non-transparent connecting parts 15 between adjacent sub-frames 4 is 1, the frame structure 3 includes 3 non-transparent connecting parts 15, and these 3 non-transparent connecting parts 15 are sequentially connected to form a welding line. When the number of non-transparent connecting parts 15 between adjacent sub-frames 4 is multiple, the non-transparent connecting parts 15 at the same position of each adjacent sub-frame 4 can be set to be connected to form a welding line, such as Fig. 9 As shown, the non-transparent connection parts 15 between the sub-frames 4 on the left side of the through hole 2 are sequentially connected to form a welding line, and the non-transparent connection parts 15 between the sub-frames 4 on the right side of the through hole 2 are sequentially connected to form another welding line.

[0086] Optional, Fig.12 A top view of a frame structure provided by an embodiment of the present invention, referring to Fig.12 In other possible embodiments, the frame structure 3 may still include a plurality of sub-frames 4 sequentially arranged along the central axis Z; a plurality of non-transparent connecting portions 15 connecting the plurality of sub-frames 4 are respectively located at different positions of a circle centered on the central axis Z.

[0087] Specifically, Fig.12 In the illustrated embodiment, the structure of the subframe 4 is the same as that in the above embodiment, except that the non-transparent connecting portions 15 between different subframes 4 are no longer arranged on the same straight line, but are arranged at different positions of a circle centered on the central axis Z. In simple terms, different subframes 4 are no longer welded from the same position, the non-transparent connecting portions 15 are located at different regions between the subframes 4, and the projections of the non-transparent connecting portions 15 along the first direction X are no longer connected in a straight line, but are scattered at different positions on the side wall of the frame structure 3.

[0088] In this configuration, each non-transparent connection portion 15 has a smaller size along the first direction X, which will not affect the light emitting effect of the backlight module 20 when the display device is displaying normally, thereby preventing the non-transparent connection portion 15 from forming a "dark spot" and affecting the display effect.

[0089] Optionally, in a preferred embodiment, multiple non-transparent connecting parts 15 connecting multiple sub-frames 4 can be arranged at multiple equally divided positions of a circle centered on the central axis Z, that is, the non-transparent connecting parts 15 between different sub-frames 4 are respectively located on different equally divided lines of the circle. In this way, the position distribution of the non-transparent connecting parts 15 in the frame structure 3 is relatively uniform, which is conducive to improving the fixing effect between the sub-frames 4; in addition, in the display area covered by the frame structure 3, the non-transparent connecting parts 15 block the light in the vertical direction more uniformly, and have less influence on the light output of the backlight module 20.

[0090] Fig.12 The setting position of the non-transparent connecting portion 15 shown is only an optional exemplary case, and the actual setting is not limited thereto, and can be set by those skilled in the art according to actual needs.

[0091] The embodiment of the present invention does not limit the material of the subframe 4, but it should be noted that the subframe 4 can be made of a high reflectivity material. It can also be understood that the side wall of the light guide channel 5 is made of a high reflectivity material, so that the reflection effect of the light on the side wall of the light guide channel 5 can be improved, thereby improving the directional light guiding effect of the light guide channel 5.

[0092] Exemplarily, the reflectivity of the subframe 4 can be set to be greater than or equal to 90%. That is, the side walls of the light-guiding channel 5 formed by adjacent subframes 4 can reflect 90% or more of the light, preventing the light from passing through the side walls of the subframe 4 toward the center of the through hole 2 and affecting the photosensitivity of the electronic photosensitive device 7.

[0093] Optionally, the embodiment of the present invention does not limit the specific material of the high reflectivity material, and those skilled in the art may set it according to actual needs.

[0094] Exemplarily, the sub-frame 4 may be made of metal.

[0095] Metal materials have good reflective effects and mechanical properties. In an optional embodiment, the subframe 4 can be set to a metal frame, such as an iron frame or a silver frame, but is not limited thereto. The subframe 4 is made of metal material, which can ensure the strength of the frame structure 3 and the light guiding effect of the light guiding channel 5 at the same time.

[0096] Of course, in other embodiments, the iron frame may be made of highly reflective organic materials. Organic materials have good corrosion resistance and can also improve the reliability of the frame structure 3.

[0097] Based on the same concept, an embodiment of the present invention further provides a display device, Fig.13 A schematic diagram of a display device according to an embodiment of the present invention is provided. Figure 3 and Fig.13The display device includes a display panel 6 and a backlight module 20 provided by any embodiment of the present invention. The display panel 6 is located at the light emitting side of the backlight module 20, that is, the display panel 6 is arranged on the upper surface of the main body 1.

[0098] The embodiment of the present invention does not limit the specific configuration of the display panel 6 , and any structure of the display panel 6 known to those skilled in the art is within the scope of the technical solution protected by the embodiment of the present invention.

[0099] The display device further includes an electronic photosensitive device 7, such as a camera, which can be arranged below the through hole 2 or inside the through hole 2. To ensure the photosensitive effect of the electronic photosensitive device 7, the projection of the electronic photosensitive device 7 along the first direction X can be arranged to be located at the innermost side of the frame structure 3, that is, located at the inner side of the most central sub-frame 4 of the at least two sub-frames 4 of the ring, so as to prevent external light from being blocked by the frame structure 3.

[0100] In the display device provided by the embodiment of the present invention, the thickness of a single sub-frame along the second direction is relatively thin, and no "black line" will appear when the display device is displaying normally. In addition, the thickness of the frame structure as a whole along the second direction increases, which enhances the ability of the frame structure to block light horizontally; at the same time, the light emitted by the backlight source and directed toward the side wall of the through hole along the second direction can enter the light guide channel after passing through the side wall of the through hole, and then be directed toward the light output surface of the backlight module in a nearly vertical direction along the light guide path of the light guide channel. The existence of the frame structure can guide the light in a vertical direction, thereby effectively improving the light leakage problem, thereby improving the display effect of the display device and the photosensitivity effect of the electronic photosensitive device.

[0101] The display device provided by the embodiment of the present invention includes all the technical features and corresponding beneficial effects of the backlight module provided by any embodiment of the present invention, which will not be described in detail here.

[0102] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, combinations and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A backlight module, characterized in that: include: Main body; A through hole, passing through the main body along a first direction, wherein the first direction is perpendicular to the light emitting surface of the backlight module; A frame structure, at least partly located in the through hole; the frame structure comprises at least two sub-frames which are sequentially annular; a light guide channel is formed between any two adjacent sub-frames, the entrance of the light guide channel faces the side wall of the through hole, and the exit of the light guide channel faces the light emitting surface of the backlight module; The sub-frame includes a first sub-section and a second sub-section connected to each other; the projection of the first sub-section along the first direction is annular, and the first sub-section is parallel to the light emitting surface of the backlight module; the second sub-section is cylindrical, and in the same sub-frame, the projection of the second sub-section along the first direction is located within the projection of the first sub-section along the first direction; The frame structure further includes at least one connecting portion; the connecting portion is used to connect any two adjacent sub-frames.

2. The backlight module according to claim 1, characterized in that: Along the first direction, the sidewall of the second section is inclined toward a direction away from the sidewall of the through hole.

3. The backlight module according to claim 1, characterized in that: The shape of the second section includes at least any one of a cylindrical tube, a truncated cone tube, a prismatic tube and a prism-shaped tube.

4. The backlight module according to claim 1, characterized in that: Also includes: A fixed frame is connected to the frame structure and the main body respectively, and is used to fix the frame structure and the main body.

5. The backlight module according to claim 4, characterized in that: The fixed frame includes a third division and a fourth division that are interconnected; the third division is cylindrical, and the at least two sub-frames are encircled by the third division; the fourth division is parallel to a surface of the main body that is away from the light-emitting surface of the backlight module, the fourth division includes a light-transmitting hole, the edge of the light-transmitting hole is connected to the third division, and the fourth division extends to a portion of the main body that is away from the light-emitting surface of the backlight module and is fixedly connected to the main body; the sub-frame that is located most centrally among the at least two sub-frames is fixedly connected to a portion of the fourth division that is located between the third division and the main body.

6. The backlight module according to claim 5, characterized in that: The fixed frame and the sub-frame located most centrally among the at least two sub-frames are an integrated structure.

7. The backlight module according to claim 4, characterized in that: The first sub-section of the sub-frame is located in the through hole; in the same sub-frame, a side of the first sub-section away from the second sub-section is connected to a side wall of the through hole.

8. The backlight module according to claim 1, characterized in that: The length of the frame structure along the first direction is greater than or equal to the length of the main body along the first direction.

9. The backlight module according to claim 1, characterized in that: The connecting portion is a transparent connecting portion, and the transparent connecting portion at least partially fills the space between any two adjacent sub-frames.

10. The backlight module according to claim 1, characterized in that: The connecting portion is a non-transparent connecting portion, and the non-transparent connecting portion is used to connect the first sub-portions and / or the second sub-portions of any two adjacent sub-frames.

11. The backlight module according to claim 10, characterized in that: The frame structure includes a plurality of sub-frames which are arranged in a circle in sequence, and a plurality of non-transparent connecting parts which connect the plurality of sub-frames are located in a same straight line in sequence.

12. The backlight module according to claim 10, characterized in that: The frame structure comprises a plurality of sub-frames which are arranged in sequence along the central axis; and a plurality of non-transparent connecting parts which connect the plurality of sub-frames are respectively located at different positions of a circle centered on the central axis.

13. The backlight module according to claim 1, characterized in that: The reflectivity of the sub-frame is greater than or equal to 90%.

14. The backlight module according to claim 1, characterized in that: The subframe is made of metal.

15. A display device, characterized in that: It comprises a display panel and a backlight module as described in any one of claims 1 to 14 above; The display panel is arranged on the light emitting side of the backlight module.

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