Backlight module and display device

Abstract

The embodiment of the utility model provides a backlight module and a display device, relates to the technical field of display, and can reduce the edge light emitting amount of a blind hole structure, inhibit the edge light emitting phenomenon of a blind hole, improve the brightness uniformity of a display picture and improve the display effect and the display performance of the display device. The backlight module comprises an outer frame, the outer frame comprises a back frame and side frames, the back frame and the side frames are used for forming a first containing space, the side frames comprise the first side frame and the second side frame, the second side frame is used for defining a second containing space, and the first containing space and the second containing space are located on the two sides of the second side frame respectively; the second accommodating space is used for accommodating a functional device; the light-emitting device is arranged in the first accommodating space; the optical film is arranged in the first accommodating space, and the edge of one side of the optical film is adjacent to the second side frame; the included angle between the second side frame and the back frame is a first included angle, and the first included angle is an obtuse angle.

Description

Technical Field

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

[0002] With the advancement and development of display technology, the requirements for display panel display effects are gradually increasing. For electronic products such as mobile phones, it is usually necessary to open holes in the display panel to set functional devices such as cameras. Existing display devices usually set through holes on the film layer in the backlight module to form blind holes, and set functional devices in the blind holes to increase the screen-to-body ratio of the display device.

[0003] However, the existing blind hole structure usually uses a metal frame to separate the optical film inside the backlight module from the functional devices, but the side walls of the metal frame usually reflect light, so that the light emitted from the side wall of the optical film re-enters the optical film after being reflected by the side wall of the metal back frame, resulting in an increase in the amount of light emitted from the edge of the light-shielding glue, and then causing the edge of the blind hole to shine, which will affect the brightness uniformity of the display image and affect the display effect and display performance of the display device. Utility Model Content

[0004] A backlight module and a display device provided in the embodiments of the present application can reduce the amount of light emitted from the edge of a blind hole structure, suppress the phenomenon of light emission at the edge of the blind hole, improve the brightness uniformity of the displayed image, and improve the display effect and display performance of the display device.

[0005] In a first aspect of an embodiment of the present application, a backlight module is provided, comprising:

[0006] An outer frame, comprising a back frame and a side frame, wherein the back frame and the side frame are used to form a first accommodation space, the side frame comprises a first side frame and a second side frame, the second side frame is used to enclose a second accommodation space, the first accommodation space and the second accommodation space are respectively located on both sides of the second side frame, and the second accommodation space is used to accommodate functional devices;

[0007] A light emitting device is arranged in the first accommodation space;

[0008] An optical film is disposed in the first accommodation space, and one side edge of the optical film is adjacent to the second side frame;

[0009] An included angle between the second side frame and the back frame is a first included angle, and the first included angle is an obtuse angle.

[0010] In some embodiments, the optical film includes a side wall and a lower surface, the side wall faces the second side frame, the lower surface faces the back frame and is connected to the side wall, the angle between the side wall and the lower surface of the optical film is a second angle, and the second angle of at least one of the optical films is an obtuse angle.

[0011] In some embodiments, the optical film includes a light guide plate, and the light guide plate is disposed on a side of the light emitting device away from the back frame;

[0012] The second angle of the light guide plate is an obtuse angle.

[0013] In some embodiments, the first angle matches the second angle.

[0014] In some embodiments, there is a gap between at least one of the optical films and the second side frame.

[0015] In some embodiments, a dimension of the gap in a direction from the first accommodation space to the second accommodation space ranges from 0.17 mm to 0.2 mm.

[0016] In some embodiments, the optical film includes a reflective film, a light guide plate, a diffusion film and a prism sheet, the reflective film is arranged on a side of the light-emitting device away from the back frame, the light guide plate is arranged on a side of the reflective film away from the back frame, the diffusion film is arranged on a side of the light guide plate away from the back frame, and the prism sheet is arranged on a side of the diffusion film away from the back frame.

[0017] In some embodiments, the orthographic projection edge of one end of the prism sheet close to the second side frame on the back frame coincides with the orthographic projection edge of one end of the light guide plate close to the second side frame on the back frame; or,

[0018] The orthographic projection edge of one end of the light guide plate close to the second side frame on the back frame falls within the orthographic projection of the prism sheet on the back frame.

[0019] In some embodiments, the backlight module further includes:

[0020] A shading structure is arranged on a side of the optical film away from the back frame, the shading structure is connected to the second side frame, and the orthographic projection of the shading structure on the back frame covers the orthographic projection edge of the optical film on the back frame near one end of the second accommodating space.

[0021] In some embodiments, the backlight module further includes:

[0022] A fixing structure, wherein the fixing structure at least partially wraps an end of the second side frame away from the back frame, and the fixing structure at least partially wraps an end of the shading structure connected to the second side frame.

[0023] In some embodiments, the backlight module further includes:

[0024] a light absorbing layer, the light absorbing layer being arranged on a side of the second side frame close to the first accommodation space, the light reflectivity of the light absorbing layer being lower than the light reflectivity of a surface of the second side frame close to the first accommodation space; and / or,

[0025] The light absorbing layer is arranged on a side of the back frame close to the first accommodation space; and / or,

[0026] The light absorbing layer is arranged at a corner where the second side frame is connected to the back frame.

[0027] In some embodiments, the first angle ranges from 90° to 110°.

[0028] In some embodiments, the back frame is made by a stamping process; and / or,

[0029] The light guide plate is made by an injection molding process.

[0030] According to a second aspect of an embodiment of the present application, a display device is provided, including:

[0031] A backlight module as described in any one of the first aspects above;

[0032] The functional device is arranged in the second accommodation space of the backlight module.

[0033] The backlight module provided in the embodiment of the present application sets the first angle between the back frame of the outer frame and the second side frame as an obtuse angle. This can reduce the angle between the incident light on the second side frame and the reflective surface when the light emitted from the optical film reaches the surface of the second side frame, thereby reducing the reflection angle of the light, so that the amount of light incident on the optical film after reflection from the second side frame is reduced, and at the same time, the amount of light incident on the shading structure after reflection from the second side frame is increased, so that most of the light reflected by the second side frame can be absorbed by the shading structure, thereby reducing the amount of light emitted from the edge of the shading structure, reducing the brightness of the edge of the shading structure, suppressing the brightening phenomenon of the edge of the shading structure, improving the brightness uniformity of the display image, and improving the display effect and display performance of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A schematic structural diagram of a backlight module provided in an embodiment of the present application;

[0036] Figure 2A schematic structural diagram of an existing backlight module provided in an embodiment of the present application;

[0037] Figure 3 A schematic top view of a backlight module provided in an embodiment of the present application;

[0038] Figure 4 A schematic top view of another backlight module provided in an embodiment of the present application;

[0039] Figure 5 A schematic structural diagram of another backlight module provided in an embodiment of the present application;

[0040] Figure 6 A schematic structural diagram of another backlight module provided in an embodiment of the present application;

[0041] Figure 7 A schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The embodiments will be described in detail below, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation methods described in the following embodiments do not represent all implementation methods consistent with the present application. They are only examples of systems and methods consistent with some aspects of the present application as detailed in the claims. In the several embodiments provided in the embodiments of the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways, and the device embodiments described below are merely exemplary.

[0043] In this application, for the sake of convenience, the words and phrases indicating the orientation or positional relationship, such as "middle", "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., are used to illustrate the positional relationship of the constituent elements with reference to the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application. The positional relationship of the constituent elements is appropriately changed according to the direction in which the constituent elements are described. Therefore, it is not limited to the words and phrases described in the specification, and can be appropriately replaced according to the circumstances.

[0044] The present application describes exemplary embodiments with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of the layers and the area of ​​the regions are exaggerated for clarity. Therefore, variations in the shapes relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of the regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0045] With the advancement and development of display technology, the requirements for display panel display effects are gradually increasing. For electronic products such as mobile phones, it is usually necessary to open holes in the display panel to set functional devices such as cameras. Existing display devices usually set through holes on the film layer in the backlight module to form blind holes, and set functional devices in the blind holes to increase the screen-to-body ratio of the display device.

[0046] However, the existing blind hole structure usually uses a metal frame to separate the optical film inside the backlight module from the functional devices, but the side walls of the metal frame usually reflect light, so that the light emitted from the side wall of the optical film re-enters the optical film after being reflected by the side wall of the metal back frame, resulting in an increase in the amount of light emitted from the edge of the light-shielding glue, and then causing the edge of the blind hole to shine, which will affect the brightness uniformity of the display image and affect the display effect and display performance of the display device.

[0047] In existing backlight modules, black nickel is usually plated on the inner wall of the metal frame to suppress the reflection of the metal frame, thereby preventing the light emitted from the side wall of the optical film from being reflected on the inner wall of the metal frame, further reducing the amount of light incident on the side wall of the optical film, reducing the amount of light emitted from the edge of the light-shielding glue, and improving the brightness uniformity of the display screen. However, the black nickel-plated backlight module will increase the preparation cost and difficulty of the backlight module, and will also increase the size of the light-shielding structure.

[0048] In view of this, the embodiments of the present application provide a backlight module and a display device, which can reduce the edge light output of the blind hole structure, suppress the blind hole edge light emission phenomenon, improve the brightness uniformity of the display image, and improve the display effect and display performance of the display device.

[0049] According to a first aspect of the application embodiment, a backlight module is provided, comprising: an outer frame, a light-emitting device and an optical film, wherein the outer frame comprises a back frame and a side frame, the back frame and the side frame are used to form a first accommodation space, the side frame comprises a first side frame and a second side frame, the second side frame is used to enclose a second accommodation space, the first accommodation space and the second accommodation space are respectively located on both sides of the second side frame, and the second accommodation space is used to accommodate functional devices; the light-emitting device is arranged in the first accommodation space; the optical film is arranged in the first accommodation space, and one side edge of the optical film is adjacent to the second side frame; the angle between the second side frame and the back frame is a first angle, and the first angle is an obtuse angle.

[0050] It should be noted that the backlight module provided in the embodiment of the present application can be a direct-type backlight, and the optical film is arranged on the side of the light-emitting device away from the back plate, that is, the light-emitting device is located below the optical film. The backlight module can also be an edge-entry backlight, and the optical film is located on the side of the light-emitting device away from the first side frame, that is, the light-emitting device is located on the side of the optical film. The embodiment of the present application does not specifically limit the light-emitting mode of the backlight.

[0051] For example, Figure 1 This is a schematic structural diagram of a backlight module provided in an embodiment of the present application. Figure 1 As shown, the backlight module includes: an outer frame 100, a light-emitting device 200 and an optical film 300, wherein the outer frame 100 includes a back frame 110 and a second side frame 122, a first accommodating space 101 and a second accommodating space 102 are formed on both sides of the second side frame 122, and a first angle between the second side frame 122 and the back frame 110 is an obtuse angle. It should be noted that the functional device 2000 is arranged in the second accommodating space 102, but the functional device 2000 is not a structure in the backlight module provided in the embodiment of the present application, and is only used to show the positional relationship between the second accommodating space 102 and the second side frame 122. The optical path of the light L1 emitted from the side wall of the optical film 300 in the first accommodating space 101 is shown as follows. Figure 1 shown.

[0052] For example, Figure 2 The following is a schematic structural diagram of an existing backlight module provided in an embodiment of the present application. Figure 2 As shown, the existing backlight module includes: an outer frame 100, a light emitting device 200 and an optical film 300, wherein the outer frame 100 includes a back frame 110 and a second side frame 122, and a first accommodating space 101 and a second accommodating space 102 are formed on both sides of the second side frame 122, and the first angle between the second side frame 122 and the back frame 110 is a right angle. The optical path of the light L2 emitted from the side wall of the optical film 300 in the first accommodating space 101 is as shown in FIG. Figure 1 As shown, the light L1 and the light L2 have the same exit angle at the side wall of the optical film 300 .

[0053] Combination Figure 1 and Figure 2 It can be seen that when the light L1 and the light L2 are emitted from the side wall of the optical film 300 at the same angle, the light L1 and Figure 1 The angle between the inner wall of the second side frame 122 is smaller than the angle between the light L2 and Figure 2 At the same time, the angle between the reflected light L1 after being reflected by the inner wall of the second side frame 122 and the inner wall of the second side frame 122 is also smaller than the angle between the reflected light L2 after being reflected by the inner wall of the second side frame 122 and the inner wall of the second side frame 122. The light L1 will not be incident on the optical film 300 again after being reflected, while the light L2 will be incident on the optical film 300 again after being reflected. Therefore, in the case where the second angle in the existing backlight module is a right angle, the light emitted from the side wall of the optical film 300 is reflected to the side wall of the optical film 300, and then emitted from the surface of the optical film 300 away from the back frame 110, causing the edge of the side of the backlight module close to the second accommodating space 102 to shine, resulting in poor brightness uniformity of the displayed image, affecting the display effect and display performance of the display device.

[0054] For example, Figure 3 This is a schematic top view of a backlight module provided in an embodiment of the present application. Figure 3 As shown, the backlight module includes: a first accommodating space 101 and a second accommodating space 102, the side frame 120 includes a first side frame 121 and a second side frame 122, the first accommodating space 101 and the second accommodating space 102 are respectively located on both sides of the second side frame 122, and the positive projection shape of the first accommodating space 101 on the back frame 110 is a closed shape.

[0055] For example, Figure 4 This is a schematic top view of another backlight module provided in an embodiment of the present application. Figure 4 As shown, the backlight module includes: a first accommodating space 101 and a second accommodating space 102, the side frame 120 includes a first side frame 121 and a second side frame 122, the first accommodating space 101 and the second accommodating space 102 are respectively located on both sides of the second side frame 122, and the positive projection shape of the first accommodating space 101 on the back frame 110 is an open shape.

[0056] The backlight module provided in the embodiment of the present application sets the first angle between the back frame 110 of the outer frame 100 and the second side frame 122 as an obtuse angle. When the light emitted from the optical film 300 reaches the surface of the second side frame 122, the angle between the incident light on the second side frame 122 and the reflecting surface can be reduced, thereby reducing the reflection angle of the light, so that the amount of light incident on the optical film 300 after being reflected from the second side frame 122 is reduced, and at the same time, the amount of light incident on the shading structure after being reflected from the second side frame 122 can be increased, so that most of the light reflected by the second side frame 122 can be absorbed by the shading structure, thereby reducing the amount of light emitted from the edge of the shading structure, reducing the brightness of the edge of the shading structure, suppressing the brightening phenomenon of the edge of the shading structure, improving the brightness uniformity of the display screen, and improving the display effect and display performance of the display device.

[0057] In some feasible embodiments, the optical film 300 includes a side wall and a lower surface, the side wall faces the second side frame 122, the lower surface faces the back frame 110 and is connected to the side wall, the angle between the side wall and the lower surface of the optical film 300 is the second angle, and the second angle of at least one optical film 300 is an obtuse angle.

[0058] For example, Figure 5 This is a schematic structural diagram of another backlight module provided in an embodiment of the present application. Figure 5 As shown, the backlight module includes: an outer frame 100, a light emitting device 200 and an optical film 300, wherein the outer frame 100 includes a back frame 110 and a side frame 120, the side frame 120 includes a first side frame 121 and a second side frame 122, a first accommodating space 101 and a second accommodating space 102 are formed on both sides of the second side frame 122, a first angle α between the second side frame 122 and the back frame 110 is an obtuse angle, and a second angle β between the side wall and the lower surface of at least one optical film 300 is an obtuse angle. The optical path of the light L3 emitted from the side wall of the optical film 300 in the first accommodating space 101 is as shown in FIG. Figure 5 As shown, the light L1, the light L2 and the light L3 have the same exit angle at the side wall of the optical film 300. Figure 5 The first angle α and Figure 1 The first angle α is equal.

[0059] refer to Figure 5 , when the light L3 is emitted from the side wall of the light guide plate 310, refraction occurs on the side wall of the light guide plate 310, the incident angle of the light L3 on the side wall of the light guide plate 310 is x, the refraction angle is y, the refractive index of the gas environment between the light guide plate 310 and the second side frame 122 is n1, and the refractive index of the light guide plate 310 is n2. For example, there is air between the light guide plate 310 and the second side frame 122, n1 is 1, the light guide plate 310 includes polycarbonate, and n2 is 1.49. According to the law of refraction:

[0060]

[0061] It can be determined that the refraction angle y is greater than the incident angle x. Taking the derivative of the refraction angle y, it can be determined that:

[0062]

[0063] The increase of the refraction angle y is greater than the increase of the incident angle x. Combined with the law of total reflection, the angle range of the incident angle x is 0° to 44.2°.

[0064] Combination Figure 1 and Figure 5 It can be seen that when the light L1 and the light L3 are emitted from the side wall of the optical film 300 at the same angle of incidence, the angle between the light L1 and the optical side wall whose second angle β is a right angle is greater than the angle between the light L3 and the optical side wall whose second angle β is an obtuse angle. Figure 5 The first angle α and Figure 1 When the first angle α is equal, the incident angle of the light L1 incident on the inner wall of the second side frame 122 is greater than the incident angle of the light L3 incident on the inner wall of the second side frame 122, and the angle between the reflected light of the light L1 after being reflected by the inner wall of the second side frame 122 and the inner wall of the second side frame 122 is also greater than the angle between the reflected light of the light L3 after being reflected by the inner wall of the second side frame 122 and the inner wall of the second side frame 122. Therefore, by setting the second angle β of at least one optical film 300 to be an obtuse angle, the reflection angle of the light can be further reduced, and the risk of the light emitted from the side wall of the optical film 300 re-incident on the optical film 300 is reduced.

[0065] The backlight module provided in the embodiment of the present application can further reduce the angle between the incident light and the reflective surface, thereby further reducing the incident amount of reflected light of the optical film 300, suppressing the edge shining phenomenon of the blind hole structure in the backlight module, improving the brightness uniformity of the display image, and improving the display effect and display performance of the display device.

[0066] In some feasible implementations, the optical film 300 includes a light guide plate, which is disposed on a side of the light emitting device away from the back frame 110 ; and the second angle β of the light guide plate is an obtuse angle.

[0067] refer to Figure 1 , the optical film 300 includes a light guide plate 310 .

[0068] It should be noted that a plurality of optical films 300 are usually provided in the backlight module so that the light emitted by the light emitting devices 200 distributed in a point shape can be diffused in the optical films 300 to form a uniform surface light source. Among the plurality of optical films 300 in the backlight module, the light guide plate 310 has the thickest thickness and the smallest distance from the light emitting device 200, so the light guide plate 310 close to the side wall of the second side frame 122 has the highest probability of emitting light.

[0069] The backlight module provided in the embodiment of the present application can change the light output angle of the side wall of the light guide plate 310, further reduce the angle between the incident light and the reflective surface, thereby further reducing the incident amount of reflected light of the optical film 300, suppressing the edge shining phenomenon of the blind hole structure in the backlight module, improving the brightness uniformity of the display screen, and improving the display effect and display performance of the display device.

[0070] In some feasible implementations, the first angle α matches the second angle β.

[0071] Exemplarily, the first angle α and the second angle β cooperate with each other including that the first angle α and the second angle β are equal, or the first angle α and the second angle β are approximately equal, or the difference between the first angle α and the second angle β is less than a preset angle.

[0072] It should be noted that, when the first angle α is less than the second angle β, the incident angle of the light emitted from the side wall of the optical film 300 to the inner wall of the second side frame 122 is usually less than the incident angle when the first angle α is greater than or equal to the second angle β, resulting in a larger reflection angle of the light and an increased risk of re-incident on the optical film 300. In addition, when the first angle α is greater than the second angle β, the size of the orthographic projection of the second side frame 122 on the plane where the back frame 110 is located will increase, thereby causing the distance between the side surface of the second side frame 122 close to the second accommodating space 102 and the plane where the back frame 110 is located to decrease, so that the area of ​​the side surface of the second side frame 122 close to the second accommodating space 102 close to the back frame 110 cannot be used to accommodate the functional device 2000, thereby requiring the size of the second accommodating space 102 to be further increased, resulting in the back frame module at this time being difficult to adapt to the demand for increasing the screen-to-body ratio of the display device.

[0073] The backlight module provided in the embodiment of the present application can weaken the edge shining phenomenon of the blind hole structure in the backlight module, and at the same time can reduce the size of the second accommodating space 102, increase the screen-to-body ratio of the display device, reduce the size of the black border at the edge of the functional device 2000, and improve the brightness uniformity of the display screen and the display effect of the display device.

[0074] In some feasible implementations, there is a gap between at least one optical film 300 and the second side frame 122 .

[0075] refer to Figure 1 , there is a gap between at least one optical film 300 and the second side frame 122 .

[0076] The backlight module provided in the embodiment of the present application has a gap between the optical film 300 and the second side frame 122, which can leave a deformation space for the optical film 300, thereby avoiding interference between the optical film 300 and the side wall of the second side frame 122 and affecting the optical performance of the backlight module, thereby improving the reliability and stability of the backlight module and improving the display performance of the display device.

[0077] In some feasible implementations, a dimension of the gap in a direction from the first accommodating space 101 to the second accommodating space 102 ranges from 0.17 mm to 0.2 mm.

[0078] Exemplarily, the size of the gap in the direction from the first accommodating space 101 to the second accommodating space 102 may be 0.17 mm, 0.175 mm, 0.18 mm, 0.19 mm, and 0.20 mm.

[0079] The backlight module provided in the embodiment of the present application can avoid the distance between the optical film 300 and the second side frame 122 being too small, so as to prevent the optical film 300 from interfering with the side wall of the second side frame 122 when the optical film 300 undergoes deformation such as thermal expansion, thereby affecting the optical performance of the backlight module. At the same time, it can avoid the distance between the optical film 300 and the second side frame 122 being too large, resulting in the size of the black border at the edge of the functional device 2000 being too large, thereby affecting the display effect of the display panel.

[0080] In some feasible embodiments, the optical film 300 includes a reflective film, a light guide plate 310, a diffusion film and a prism sheet. The reflective film is arranged on the side of the light-emitting device 200 away from the back frame 110, the light guide plate 310 is arranged on the side of the reflective film away from the back frame 110, the diffusion film is arranged on the side of the light guide plate 310 away from the back frame 110, and the prism sheet is arranged on the side of the diffusion film away from the back frame 110.

[0081] For example, Figure 6 This is a schematic structural diagram of another backlight module provided in an embodiment of the present application. Figure 6As shown, the backlight module includes: an outer frame 100, a light emitting device 200 and an optical film 300. The outer frame 100 includes a back frame 110 and a side frame 120, the side frame 120 includes a first side frame 121 and a second side frame 122, a first accommodating space 101 and a second accommodating space 102 are formed on both sides of the second side frame 122, a first angle α between the second side frame 122 and the back frame 110 is an obtuse angle, the optical film 300 includes a light guide plate 310, a prism sheet 320, a reflective film 330 and a diffusion film 340, and a second angle β between the side wall and the lower surface of the light guide plate 310 is an obtuse angle.

[0082] The backlight module provided in the embodiment of the present application can further diffuse the light emitted by the point-distributed light-emitting devices 200 by setting a plurality of optical films 300, thereby improving the brightness uniformity of the displayed image and improving the display effect and display performance of the display device.

[0083] In some feasible implementations, the orthographic projection edge of one end of the prism sheet 320 close to the second side frame 122 on the back frame 110 coincides with the orthographic projection edge of one end of the light guide plate 310 close to the second side frame 122 on the back frame 110 .

[0084] refer to Figure 6 The orthographic projection edge of one end of the prism sheet 320 close to the second side frame 122 on the back frame 110 coincides with the orthographic projection edge of one end of the light guide plate 310 close to the second side frame 122 on the back frame 110, and the minimum distance between the side wall of the prism sheet 320 close to the second side frame 122 and the second side frame 122 is greater than the minimum distance between the side wall of the light guide plate 310 close to the second side frame 122 and the second side frame 122.

[0085] The backlight module provided in the embodiment of the present application can reduce the probability of reflected light being incident on the side wall of the prism sheet 320 by increasing the distance between the prism sheet 320 and the second side frame 122, and can further suppress the edge shining phenomenon of the blind hole structure in the backlight module, thereby improving the brightness uniformity of the display image and improving the display effect and display performance of the display device.

[0086] refer to Figure 1 and Figure 5 In some feasible implementations, the orthographic projection edge of one end of the light guide plate 310 close to the second side frame 122 on the back frame 110 falls within the orthographic projection of the prism sheet 320 on the back frame 110 .

[0087] The backlight module provided in the embodiment of the present application can enable all the light emitted from the surface of the light guide plate 310 away from the back frame 110 to be incident on the prism sheet 320, thereby increasing the amount of light emitted from the surface of the prism sheet 320 away from the back frame 110, improving the brightness uniformity of the displayed image, and improving the display effect and display performance of the display device.

[0088] In some feasible embodiments, the backlight module also includes: a shading structure, which is arranged on the side of the optical film 300 away from the back frame 110, and the shading structure is connected to the second side frame 122, and the orthographic projection of the shading structure on the back frame 110 covers the orthographic projection edge of the optical film 300 on the back frame 110 near one end of the second accommodating space 102.

[0089] refer to Figure 1 The backlight module also includes a shading structure 400 .

[0090] It should be noted that, when the first angle α is an obtuse angle, the light reflected by the side wall of the second side frame 122 is concentrated in the gap between the second side frame 122 and the optical film 300 and near the end of the optical film 300 close to the second side frame 122. By covering the gap between the second side frame 122 and the optical film 300 and part of the optical film 300 with the shading structure 400, the difference between the light emission amount on the side of the shading structure 400 away from the second side frame 122 and the light emission amount on the side of the optical film 300 away from the second side frame 122 can be reduced, thereby improving the brightness uniformity of the displayed image, suppressing the phenomenon of the edge of the shading structure 400 shining, and improving the display effect and display performance of the display device.

[0091] In some feasible implementations, the backlight module further includes: a fixed structure, which at least partially wraps an end of the second side frame 122 away from the back frame 110 , and at least partially wraps an end of the shading structure 400 connected to the second side frame 122 .

[0092] refer to Figure 1 The backlight module further includes an encapsulation layer 500 and a fixing structure 600 . The fixing structure 600 wraps one end of the light shielding structure 400 connected to the second side frame 122 , and the fixing structure 600 is partially connected to the encapsulation layer 500 .

[0093] For example, the encapsulation layer 500 may include a polarizer, a glass cover, etc. The fixing structure 600 may include hot melt adhesive, etc.

[0094] The backlight module provided in the embodiment of the present application can further reinforce the connection between the second side frame 122 and the shading structure 400 through the fixed structure 600, and can further support the shading structure 400 to avoid the two sides of the shading structure 400 corresponding to the gap between the second side frame 122 and the optical film 300 being suspended in the air, thereby improving the reliability of the shading structure and improving the display performance of the backlight module.

[0095] In some feasible embodiments, the backlight module further includes: a light absorbing layer, which is arranged on a side of the second side frame 122 close to the first receiving space 101 , and the reflectivity of the light absorbing layer is lower than the reflectivity of the surface of the second side frame 122 close to the first receiving space 101 .

[0096] refer to Figure 6 The backlight module further includes a light absorbing layer 700 , and a portion of the light absorbing layer 700 is disposed on a side of the second side frame 122 close to the first receiving space 101 .

[0097] For example, the light absorbing layer 700 may include materials such as black nickel.

[0098] The backlight module provided in the embodiment of the present application can absorb the light emitted from the side wall of the optical film 300 through the light absorbing layer 700, reduce the amount of reflected light, and thus further reduce the amount of light re-incident on the side wall of the optical film 300, suppress the brightening phenomenon of the edge of the shading structure 400, improve the brightness uniformity of the display screen, and improve the display effect and display performance of the display device.

[0099] In some feasible implementations, the light absorbing layer 700 is disposed on a side of the back frame 110 close to the first receiving space 101 .

[0100] The backlight module provided in the embodiment of the present application can further absorb the light incident on the surface of the back frame 110 through the light absorbing layer 700, suppress the reflection phenomenon on the surface of the back frame 110, thereby further improving the brightness uniformity of the displayed image and improving the display effect and display performance of the display device.

[0101] In some feasible implementations, the light absorbing layer 700 is disposed at the corner where the second side frame 122 and the back frame 110 are connected.

[0102] Exemplarily, the light absorbing layer 700 is disposed on a side of the corner close to the first receiving space 101 .

[0103] The backlight module provided in the embodiment of the present application can further absorb the light emitted from the side wall of the optical film 300 through the light absorbing layer 700, reduce the amount of reflected light, and thus further reduce the amount of light re-incident on the side wall of the optical film 300, suppress the brightening phenomenon of the edge of the shading structure 400, improve the brightness uniformity of the display screen, and improve the display effect and display performance of the display device.

[0104] In some feasible implementations, the first angle α ranges from 90° to 110°.

[0105] Exemplarily, the first angle α may be 90°, 95°, 100°, 105°, and 110°.

[0106] It should be noted that if the first angle α is too small, the incident angle of the light emitted from the side wall of the optical film 300 on the surface of the second side frame 122 will be larger, and the reflection angle will also be larger, which will make the edge of the shading structure 400 obviously bright and the brightness uniformity of the displayed image will be poor. If the first angle α is larger, the size of the non-display area around the second accommodating space 102 will increase, and the screen-to-body ratio of the backlight module will decrease.

[0107] refer to Figure 6 , D is the distance between the edge of the functional device 2000 and the fixed structure 600 .

[0108] The backlight module provided in the embodiment of the present application can reduce the angle between the incident light and the reflective surface, thereby reducing the reflection angle of the light, reducing the amount of reflected light incident on the optical film 300, and further suppressing the edge shining phenomenon of the blind hole structure in the shading structure 400, thereby improving the brightness uniformity of the display screen, and at the same time reducing the size of the second accommodating space 102, increasing the screen-to-body ratio of the display device, reducing the size of the black border at the edge of the functional device 2000, and improving the brightness uniformity of the display screen and the display effect of the display device.

[0109] In some feasible implementations, the back frame 110 is made by a stamping process.

[0110] The backlight module provided in the embodiment of the present application can reduce the difficulty of manufacturing the inner and outer frames 100 of the backlight module and improve the manufacturing efficiency.

[0111] In some feasible implementations, the light guide plate 310 is made by an injection molding process.

[0112] The backlight module provided in the embodiment of the present application can improve the forming effect of the light guide plate 310, reduce the difficulty of preparing the light guide plate 310, enhance the light diffusion ability of the light guide plate 310, and improve the display effect and display performance of the backlight module.

[0113] Taking the size of a conventional mobile phone as an example, the functional device 2000 is a camera, such as Figure 6As shown, D is the distance between the functional device 2000 and the fixed structure 600. The dimension of the light guide plate 310 in the thickness direction of the back frame 110 is 0.34 mm, the distance between the back frame 110 and the shading structure 400 is 0.63 mm, the distance between the orthographic projection edge of the end of the second side frame 122 away from the back frame 110 on the back frame 110 and the orthographic projection edge of the end of the back frame 110 close to the second side frame 122 on the back frame 110 is 0.11 mm, and the dimension of the end of the side wall of the light guide plate 310 away from the back frame 110 and the end of the side wall of the light guide plate 310 close to the back frame 110 in the direction from the second accommodation space 102 to the first accommodation space 101 is 0.06 mm. Therefore, it can be determined that the first angle α of the above-mentioned backlight module is 100°, and the second angle β is 100°.

[0114] For the above-mentioned backlight module, relative to the backlight module with the first angle α being a right angle, when the light incident angle x is 10°, the light reflection angle can be reduced by 25.6°, when the light incident angle x is 20°, the light reflection angle can be reduced by 27.5°, and when the light incident angle x is 30°, the light reflection angle can be reduced by 35.1°. Therefore, the backlight module provided in the embodiment of the present application has a good effect in suppressing the edge shining phenomenon of the shading structure 400.

[0115] For example, Figure 7 Schematic diagram of a display device provided in an embodiment of the present application. Figure 7 As shown, a second aspect of an embodiment of the present application provides a display device, comprising: a backlight module 1000 and a functional device 2000 as described in any one of the first aspects above, wherein the functional device 2000 is disposed in a second receiving space 102 of the backlight module.

[0116] Exemplarily, the functional device 2000 may be a camera, a speaker, a sensor device, etc.

[0117] It should be noted that the second receiving space 102 can be configured to have different shapes according to the shape and operation requirements of the functional device 2000, for example, closed shapes such as circle, ring, rectangle, and various open shapes.

[0118] The display device provided in the embodiment of the present application sets the first angle between the back frame 110 of the outer frame 100 and the second side frame 122 as an obtuse angle. When the light emitted from the optical film 300 reaches the surface of the second side frame 122, the angle between the incident light on the second side frame 122 and the reflecting surface can be reduced, thereby reducing the reflection angle of the light, so that the amount of light incident on the optical film 300 after being reflected from the second side frame 122 is reduced, and at the same time, the amount of light incident on the shading structure 400 after being reflected from the second side frame 122 can be increased, so that most of the light reflected by the second side frame 122 can be absorbed by the shading structure 400, thereby reducing the amount of light emitted from the edge of the shading structure 400, reducing the brightness of the edge of the shading structure 400, suppressing the brightening phenomenon of the edge of the shading structure 400, improving the brightness uniformity of the display screen, and improving the display effect and display performance of the display device.

[0119] It should be noted that the display device provided in the embodiments of the present application may include a smart phone, a tablet computer, a laptop computer, a television, and a smart wearable display device, etc. The smart wearable display device may include a smart watch, etc., and the embodiments of the present application do not make specific limitations.

[0120] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A backlight module, characterized in that: include: An outer frame, comprising a back frame and a side frame, wherein the back frame and the side frame are used to form a first accommodation space, the side frame comprises a first side frame and a second side frame, the second side frame is used to enclose a second accommodation space, the first accommodation space and the second accommodation space are respectively located on both sides of the second side frame, and the second accommodation space is used to accommodate functional devices; A light emitting device is arranged in the first accommodation space; An optical film is disposed in the first accommodation space, and one side edge of the optical film is adjacent to the second side frame; An included angle between the second side frame and the back frame is a first included angle, and the first included angle is an obtuse angle.

2. The backlight module according to claim 1, characterized in that: The optical film includes a side wall and a lower surface, the side wall faces the second side frame, the lower surface faces the back frame and is connected to the side wall, the angle between the side wall and the lower surface is a second angle, and the second angle of at least one of the optical films is an obtuse angle.

3. The backlight module according to claim 2, characterized in that: The optical film comprises a light guide plate, and the light guide plate is arranged on a side of the light emitting device away from the back frame; The second angle of the light guide plate is an obtuse angle.

4. The backlight module according to claim 2, characterized in that: The first angle matches the second angle.

5. The backlight module according to claim 1, characterized in that: There is a gap between at least one of the optical films and the second side frame.

6. The backlight module according to claim 5, characterized in that: A dimension of the gap in a direction from the first accommodation space to the second accommodation space ranges from 0.17 mm to 0.2 mm.

7. The backlight module according to claim 1, characterized in that: The optical film includes a reflective film, a light guide plate, a diffusion film and a prism sheet. The reflective film is arranged on a side of the light-emitting device away from the back frame, the light guide plate is arranged on a side of the reflective film away from the back frame, the diffusion film is arranged on a side of the light guide plate away from the back frame, and the prism sheet is arranged on a side of the diffusion film away from the back frame.

8. The backlight module according to claim 7, characterized in that: The orthographic projection edge of one end of the prism sheet close to the second side frame on the back frame coincides with the orthographic projection edge of one end of the light guide plate close to the second side frame on the back frame; or, The orthographic projection edge of one end of the light guide plate close to the second side frame on the back frame falls within the orthographic projection of the prism sheet on the back frame.

9. The backlight module according to claim 1, characterized in that: Also includes: A shading structure is arranged on a side of the optical film away from the back frame, the shading structure is connected to the second side frame, and the orthographic projection of the shading structure on the back frame covers the orthographic projection edge of the optical film on the back frame near one end of the second accommodating space.

10. The backlight module according to claim 9, characterized in that: Also includes: A fixing structure, wherein the fixing structure at least partially wraps an end of the second side frame away from the back frame, and the fixing structure at least partially wraps an end of the shading structure connected to the second side frame.

11. The backlight module according to claim 1, characterized in that: Also includes: a light absorbing layer, the light absorbing layer being arranged on a side of the second side frame close to the first accommodation space, the light reflectivity of the light absorbing layer being lower than the light reflectivity of a surface of the second side frame close to the first accommodation space; and / or, The light absorbing layer is arranged on a side of the back frame close to the first accommodation space; and / or, The light absorbing layer is arranged at a corner where the second side frame is connected to the back frame.

12. The backlight module according to claim 1, characterized in that: The first angle ranges from 90° to 110°.

13. The backlight module according to claim 3, characterized in that: The back frame is made by a stamping process; and / or, The light guide plate is made by an injection molding process.

14. A display device, characterized in that: include: The backlight module according to any one of claims 1 to 13; The functional device is arranged in the second accommodation space of the backlight module.

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