CN112485948B

CN112485948B - Backlight module and display device

Info

Publication number: CN112485948B
Application number: CN202011576834.9A
Authority: CN
Inventors: 黄阿海
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-10-11
Anticipated expiration: 2040-12-28
Also published as: CN112485948A

Abstract

The invention discloses a backlight module and a display device: the backlight module comprises a frame body, wherein the frame body comprises a functional area and a first area which are adjacent, the first area comprises at least one thinning area, and the thickness of the thinning area is smaller than that of the functional area; the first region further comprises a first transition region, the first transition region being located between the thinning region and the functional region; the thickness of the end of the first transition area connected with the thinning area is equal to the thickness of the thinning area, the thickness of the end of the first transition area connected with the functional area is equal to the thickness of the functional area, and the first transition area at least comprises a first thickness area and a second thickness area along the direction of the thinning area pointing to the functional area, the second thickness area is positioned on one side of the first thickness area close to the functional area, and the thickness of the first thickness area is smaller than that of the second thickness area. The first thinning area can be thinned locally, so that the weight can be reduced, and the cost can be reduced.

Description

Backlight module and display device

Technical Field

The invention relates to the technical field of display, in particular to a backlight module and a display device.

Background

With the rapid development of display technologies, liquid crystal display devices (such as lcd televisions, lcd monitors, and liquid crystal display screens) are increasingly widely used in production and daily life by virtue of low voltage driving, flat panel structure, large amount of display information, easy colorization, long service life, and no radiation or pollution. However, the lcd device is a passive display device, which cannot emit Light, and therefore a backlight Unit (BLU) is required to be disposed below the lcd panel to provide the required Light source, so as to achieve the display effect. At present, the widely developed demand also puts higher demands on the liquid crystal display device, and in terms of the external dimensions, it is desirable that the thickness of the liquid crystal display device is thinner as well as better. Particularly, in the coming 5G liquid crystal display device, more antennas and other devices are required, which results in the whole liquid crystal display device being heavier and affects the use experience, so that it is significant to reduce the weight on the premise of not changing the function and the quality.

Disclosure of Invention

In view of this, the present invention provides a backlight module and a display device, in which the first thinning region is arranged to reduce the weight and the cost by local thinning.

In one aspect, the present invention provides a backlight module, including:

the frame body comprises a functional region and a first region which are adjacent, the first region comprises at least one thinning region, and the thickness of the thinning region is smaller than that of the functional region;

the first region further comprises a first transition region, and the first transition region is positioned between the thinning region and the functional region;

first transition district with the thickness of the one end that the attenuate region is connected with the thickness in attenuate region equals, first transition district with the thickness of the one end that the functional region is connected with the thickness of functional region equals, and follows the attenuate region points to in the direction of functional region, first transition district includes first thickness district and second thickness district at least, the second thickness district is located first thickness district is close to one side of functional region, the thickness of first thickness district is less than the thickness of second thickness district.

In another aspect, the present disclosure provides a display device including any one of the backlight modules provided in the present disclosure.

Compared with the prior art, the backlight module and the display device provided by the invention at least realize the following beneficial effects:

according to the backlight module and the display device, the frame body comprises the adjacent functional area and the first area, the first area comprises at least one thinning area, and the thickness of the thinning area is smaller than that of the functional area. The frame body is provided with the thinning area, so that the frame body is locally thinned, the weight can be reduced, and the cost is reduced. Further, the first region further comprises a first transition region, and the first transition region is positioned between the thinning region and the functional region; and in the direction of pointing to the functional area along the thinning area, the first transition area at least comprises a first thickness area and a second thickness area, the second thickness area is positioned on one side of the first thickness area close to the functional area, and the thickness of the first thickness area is smaller than that of the second thickness area. The thickness difference between attenuate region and the functional area exists the difference in section and receives stress fracture easily promptly, set up first transition district between attenuate region and functional area, and first transition district is including the first thickness district that is close to attenuate region one side and the second thickness district that is close to functional area one side, the thickness in first thickness district is less than the thickness of second thickness, first transition district can make and have a transition district between attenuate region and the functional area through setting up first thickness district promptly, avoid the great stress of thickness difference between attenuate region and the functional area to take place fracture easily.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic structural diagram of a backlight module in the prior art;

FIG. 2 is a cross-sectional view taken along the direction N-N' of FIG. 1;

FIG. 3 is a schematic structural diagram of a backlight module according to the present invention;

FIG. 4 is a cross-sectional view taken along line M-M' of FIG. 3;

FIG. 5 is a further cross-sectional view taken along line M-M' of FIG. 3;

FIG. 6 is a further cross-sectional view taken along line M-M' of FIG. 3;

FIG. 7 is a cross-sectional view taken along line H-H' of FIG. 3;

FIG. 8 is a further sectional view taken in the direction H-H' of FIG. 3;

FIG. 9 is a further sectional view taken in the direction H-H' of FIG. 3;

FIG. 10 is a top view of the support structure of FIG. 9;

FIG. 11 is a further top view of the support structure of FIG. 9;

FIG. 12 is a further top view of the support structure of FIG. 9;

fig. 13 is a schematic view of a display device according to the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

Fig. 1 and 2 show a backlight module in the prior art, in which fig. 1 is a schematic structural diagram of the backlight module in the prior art, and fig. 2 is a cross-sectional view along the direction N-N' in fig. 1. A backlight module 100 provided in the prior art includes a frame 01, and a reflection layer 02, a light guide layer 03 and a light source 04 located on the frame 01, where the light guide layer 03 is configured to emit light emitted by the light source 04 out of a light emitting surface C of the backlight module 200, and is configured to provide a display light source for a display device subsequently; the reflective layer 02 is used for reflecting the light emitted by the light source 04, so that the light can be emitted out of the light emitting surface C of the backlight module 200 through the light guide layer 03, and the utilization rate of the light emitted by the light source 04 is improved. In order to realize the frivolousness of backlight unit 100, framework 01 includes a plurality of fretwork areas 011, but owing to set up the chase of fretwork areas 011 and can lead to the light leak to show the scheduling problem that uneven, chase intensity weak, the difficult control of roughness leads to droing.

In order to solve the above technical problems, the present invention provides a backlight module and a display device. The backlight module and the display device provided by the invention are described in detail below.

In this embodiment, please refer to fig. 3 and 4, in which fig. 3 is a schematic structural diagram of a backlight module according to the present invention, and fig. 4 is a cross-sectional view along the direction M-M' in fig. 3. The backlight module 200 provided in this embodiment includes: the frame body 1 comprises a functional area A and a first area B which are adjacent, the first area A comprises at least one thinning area A1, and the thickness of the thinning area A1 is smaller than that of the functional area B; the first area A also comprises a first transition area A2, and the first transition area A2 is positioned between the thinning area A1 and the functional area B; the thickness of the end of the first transition area A2 connected with the thinning area A1 is equal to the thickness of the thinning area A1, the thickness of the end of the first transition area A2 connected with the functional area B is equal to the thickness of the functional area B, and the first transition area A2 at least comprises a first thickness area A21 and a second thickness area A22 along the direction of the thinning area A1 pointing to the functional area B, the second thickness area A22 is positioned on one side of the first thickness area A21 close to the functional area B, and the thickness of the first thickness area A21 is smaller than that of the second thickness area A22.

The number of the thinning regions A1 in the first region a is not limited, and the number of the thinning regions A1 may be set according to actual conditions, and when the first region a includes a plurality of thinning regions A1, a transition region may also be set between the thinning region A1 and another non-thinning region in the first region a, and the use of the transition region is the same as that of the first transition region A2 between the thinning region A1 and the functional region B, which is not described herein again.

It can be understood that by providing the thinned region A1 in the first region a of the frame 1, the thickness of the thinned region A1 is smaller than that of the functional region B, that is, by providing a part of the thinned region A1 of the frame 1, the weight and the cost can be effectively reduced. Meanwhile, the thickness of the thinning area A1 is smaller than that of the functional area B, but the thinning area A1 is not a hollowed area, and compared with the hollowed area in the prior art, the thinning area A1 can effectively avoid the situation that the strength of the frame body 1 is reduced due to the hollowed area, and external foreign matters easily fall into the backlight module 200 to cause white spots and external water vapor to enter to cause film material folds, so that the grade effect is influenced. Further, the first region a of the present invention further includes a first transition region A2, the first transition region A2 is located between the thinning region A1 and the functional region B, the first transition region A2 at least includes a first thickness region a21 and a second thickness region a22, the second thickness region a22 is located on a side of the first thickness region a21 close to the functional region B, and a thickness of the first thickness region a21 is smaller than a thickness of the second thickness region a 22. Because the thickness difference between the thinning area A1 and the functional area B has the segment difference and is easy to break under stress, a first transition area A2 is arranged between the thinning area A1 and the functional area B, and the first transition area A2 can enable a transition area to be arranged between the thinning area A1 and the functional area B by arranging a first thickness area A21 and a second thickness area A22, so that the phenomenon that the thickness segment difference between the thinning area A1 and the functional area B is large and the fracture is easy to occur under stress is avoided.

Optionally, the frame 1 in the backlight module 200 shown in this embodiment may be locally thinned when the frame is coiled, and only the thinning structure needs to be added in the rolling die, so that the problems that the hollowed-out area in the prior art needs to cut the frame 1, which may generate burrs to scratch the film, which may affect the quality effect, and the like, and stress may be generated in the thinned area A1 during local thinning of the frame 1 can be avoided, and further, an annealing process may be adopted to reduce the stress during thinning, so as to improve the quality of the backlight module 200.

In some alternative embodiments, shown in fig. 3, 5 and 6, fig. 5 is a further cross-sectional view along M-M 'in fig. 3, and fig. 6 is a further cross-sectional view along M-M' in fig. 3. The backlight module 200 provided in this embodiment includes: the thickness of the first transition area A1 increases in sequence along the direction in which the thinned area A1 points to the functional area B.

In the direction pointing to the functional region B along the thinning region A1, the first transition region A2 at least includes a first thickness region a21 and a second thickness region a22, the second thickness region a22 is located on one side of the first thickness region a21 close to the functional region B, and on the basis that the thickness of the first thickness region a21 is smaller than that of the second thickness region a22, the thickness of the first transition region A1 may be further set to increase sequentially, which may be understood as that the thicknesses of the plurality of first thickness regions a21 and the plurality of second thickness regions a22 increase sequentially.

It can be understood that, along the direction that the thinning area A1 points to the functional area B, the thickness of the first transition area A1 increases in sequence, which can be beneficial to the process of local thinning when the frame body coiled material is manufactured, and the integral forming is easy to realize. The thickness that sets up first transition district A1 increases in proper order simultaneously, can further reduce the segment difference between every region, and first transition district can make the segment difference between attenuate region and the functional area have a transition, avoids the great stress of thickness segment difference between attenuate region and the functional area to take place the fracture easily.

In some alternative embodiments, as shown in fig. 5 and fig. 6, the backlight module 200 provided in this embodiment includes: in the direction Y perpendicular to the functional region, the thinned region A1 includes a first surface 11 and a second surface 12 which are oppositely arranged; in the direction Y perpendicular to the thinned region, the functional region includes a third surface 13 and a fourth surface 14, which are oppositely disposed B; the first surface 11 is adjacent to the third surface 13, and the first surface 11 and the third surface 13 are located on the same horizontal plane; the second surface 12 is adjacent to the fourth surface 14, and a distance L1 between the first surface 11 and the second surface 12 is smaller than a distance L2 between the third surface 13 and the fourth surface 14.

It can be understood that, the distance L1 between the first surface 1 and the second surface 2 is smaller than the distance L2 between the third surface 3 and the fourth surface 4, that is, the thickness of the thinned region A1 is smaller than that of the functional region B, that is, by providing a part of the frame 1 to thin the region A1, the weight and the cost can be effectively reduced. Meanwhile, the thickness of the thinning area A1 is set to be smaller than that of the functional area B, but the thinning area A1 is not a hollow area, and compared with the hollow area in the prior art, the thinning area A1 can effectively prevent the strength of the frame body 1 from being reduced due to the hollow area, and the foreign matters can be effectively prevented from falling into the backlight module 200 easily to cause white spots and foreign water vapor to enter the film material to cause wrinkles, so that the grade effect can be influenced.

In some optional embodiments, with reference to fig. 5, the backlight module 200 provided in this embodiment includes: the first transition zone A1 comprises a first transition surface 15a and a second transition surface 16a, which are oppositely arranged; the first transition surface 15a is adjacent to and on the same horizontal plane as the first surface 11 and the third surface 13, respectively; the second transition surface 16a is adjacent to the second surface 12 and the fourth surface 14, respectively, and the second transition surface 16a is curved to one side of the first transition surface 15a, and the curvature radius R of the second transition surface is in the range of 2mm < R < 1000mm.

It can be understood that, in the backlight module 200 provided in this embodiment, the first transition area A1 may include the first transition surface 15a and the second transition surface 16a which are oppositely disposed, and the second transition surface 16a is curved toward one side of the first transition surface 15a, a range of a curvature radius R of the second transition surface is 2mm or more and R or more and 1000mm or less, when the curvature radius R of the second transition surface is less than 2mm, the second transition surface 16a may be recessed to a greater extent, and the first transition area may not be reached, so that a step difference between the thinned region and the functional region may have a transition, and the stress may be easily broken; when the curvature radius R of the second transition surface is larger than 1000mm, the area of the first transition area A2 is large, the thinning degree of the thinning area A1 is low and can be connected with the first transition area A2, and the thinning effect is not facilitated. Preferably, the radius of curvature R =100mm of the second transition surface allows a transition in the step difference between the thinned region and the functional region, and avoids the fracture easily caused by the large stress in the thickness step difference between the thinned region and the functional region. The curvature radius R of the second transition surface is only taken as an example, but is not limited specifically, and may be set according to actual conditions, and will not be described in detail below.

In some optional embodiments, continuing with fig. 6, the backlight module 200 provided in this embodiment includes: the first transition area A1 comprises a first transition surface 15b and a second transition surface 16b which are oppositely arranged; the first transition surface 15b is adjacent to and on the same horizontal plane as the first expression 11 and the third surface 13, respectively; the second transition surface 16B is adjacent to the second surface 12 and the fourth surface 14, respectively, and a first included angle α is included between the second transition surface 16B and the second surface 12 in a direction of pointing the thinned region A1 to the functional region B, where α is greater than 0 and less than or equal to 0.4 °.

It can be understood that, in the backlight module 200 provided in this embodiment, the first transition region A1 may include the first transition surface 15B and the second transition surface 16B which are oppositely disposed, and in the direction pointing to the functional region B along the thinning region A1, the second transition surface 16B and the second surface 12 include the first included angle α,0 < α ≦ 0.4 °, and since the included angle α between the second transition surface 16B and the second surface 12 is greater than 0.4 °, the inclination degree of the second transition surface 16B is greater, and the first transition region cannot be reached, so that there is a transition in the step difference between the thinning region and the functional region, and the breakage is easily caused by the stress. Therefore, the inclination degree of the second transition surface 16b is controlled within the range of more than 0 and less than or equal to 0.4 degrees, so that the section difference between the thinning area and the functional area has transition, and the fracture easily caused by the large stress of the thickness section difference between the thinning area and the functional area is avoided. The angle α between the second transition surface 16b and the second surface 12 is only used as an example in the present invention, but is not limited specifically, and may be set according to actual situations, and is not described in detail below.

In some alternative embodiments, shown in conjunction with fig. 3 and 7, fig. 7 is a cross-sectional view taken along line H-H' of fig. 3. The backlight module 200 provided in this embodiment: the device also comprises a shell 2, wherein the shell 2 at least partially surrounds the frame 1; the second surface 12 is positioned between the first surface 11 and the shell 2, and the distance between the second surface 12 and the side of the shell 2 close to the frame 1 is a first distance d1; the fourth surface 14 is located between the third surface 13 and the housing 2, and a distance between the fourth surface 14 and a side of the housing 2 close to the frame 1 is a second distance d2; wherein d1 > d2.

Optionally, the backlight module 200 further includes a reflective layer 3, a light guide layer 4 and a light source 5, which are located on the frame 1, where the light guide layer 4 is used to emit light emitted from the light source 5 out of the light emitting surface C of the backlight module 200, and is used to provide a display light source for the display device; the reflective layer 3 is used for reflecting the light emitted by the light source 5, so that the light can be emitted out of the light emitting surface C of the backlight module 200 through the light guide layer 4, thereby improving the utilization rate of the light emitted by the light source 5.

It can be understood that the backlight module 200 provided in this embodiment further includes a housing 2, the housing 2 at least partially encloses the frame 1, the surfaces of the frame 1 adjacent to the housing 2 are a second surface 12 and a fourth surface 14, a certain gap is provided between the frame 1 and the housing 2, that is, a first distance d1 is provided between the second surface 12 and the side of the housing 2 close to the frame 1 relative to the functional area B of the frame 1, and since the frame 1 has the thinned area A1, a second distance d2 is provided between the fourth surface 14 and the side of the housing 2 close to the frame 1 at the position corresponding to the thinned area A1, and d1 > d2. Because the distance between the corresponding position of the thinning area A1 and the casing 2 is larger, the casing 2 can be prevented from extruding the frame 1 in the subsequent deformation and extruding other devices in the display module 200 to influence the quality of the display module, and therefore, the thinning area A1 in the frame 1 in the backlight module 200 provided by the embodiment is arranged in the thinning mode on the lower surface of the frame 1, and by adopting the mode, the weight and the cost can be effectively reduced, and the casing 2 can be prevented from extruding the frame 1 in the subsequent deformation and extruding other devices in the display module 200 to influence the quality of the display module.

In some alternative embodiments, continuing with fig. 7, the present embodiment provides a backlight module 200: the second surface 12 is positioned between the first surface 11 and the shell 2, and the distance between the second surface 12 and the side of the shell 2 close to the frame 1 is a first distance d1; the fourth surface 14 is located between the third surface 13 and the housing 2, and a distance between the fourth surface 14 and a side of the housing 2 close to the frame 1 is a second distance d2; wherein d1 is more than d2, and d1-d2 is more than 0 and less than or equal to 0.03mm.

It can be understood that, when the difference between the first distance d1 between the second surface 12 and the side of the housing 2 close to the frame 1 and the second distance d2 between the fourth surface 14 and the side of the housing 2 close to the frame 1 is greater than 0.03mm, the second surface 12 of the thinning area A1 is recessed to a greater extent, and the first transition area A2 cannot be reached, so that a transition is formed between the thinning area A1 and the functional area B, and the fracture is easily caused by stress. Meanwhile, the space between the housing 2 and the frame 1 is too large, which is not favorable for fixing the frame 1 and the housing 2 and affects the quality of the display module 200.

In some alternative embodiments, shown in fig. 3, 8 and 9, fig. 8 is a further sectional view taken along the direction H-H 'in fig. 3, and fig. 9 is a further sectional view taken along the direction H-H' in fig. 3. The display module 200 provided in this embodiment: the device also comprises a shell 2, wherein the shell 2 at least partially surrounds the frame 1; the first surface 11 is positioned between the second surface 12 and the shell 2, and the third surface 131 is positioned between the fourth surface 14 and the shell 2; the backlight module 200 further includes a plurality of supporting structures G protruding from the second surface 12.

It can be understood that the surfaces of the frame 1 of the backlight module 200 provided by this embodiment, which are close to the housing 2, are the first surface 11 and the third surface 13, that is, the upper surface of the thinned area A1 of the frame 1 of the backlight module 200 provided by this embodiment is thinned, which can effectively reduce the weight and the cost. Further, as the upper surface of the thinning region A1 is thinned, that is, a certain gap is formed between the second surface 12 and the reflective layer 3 along a direction perpendicular to the backlight module 200, a film wrinkle phenomenon may occur inside the backlight module 200 during a reliability experiment of the backlight module 200. Therefore, the backlight module 200 further comprises a plurality of supporting structures G, the supporting structures G are convexly arranged on the second surface 12, and further, the supporting structures G support the second surface 12 of the thinning area A1 and the reflecting layer 3, so that the effect of preventing the film layer from being wrinkled can be effectively achieved.

As shown in fig. 8, fig. 8 only shows that the supporting structure G is independently protruded on the second surface 12 of the frame 1, that is, the supporting structure G does not need to be manufactured with the same process as the frame 1, which is beneficial to simplifying the process of the frame 1. However, the material of the support structure G is not limited in the present invention, and may be set according to the actual situation, and will not be described in detail below. With reference to fig. 9, fig. 9 only shows that the supporting structure G and the frame 1 are manufactured in the same process, i.e., the supporting structure G and the frame 1 are integrally formed, so that the process of the backlight module 200 can be simplified. The structure and shape of the support structure G are not specifically limited in the present invention, and may be set according to actual conditions, which are not described in detail below.

In some alternative embodiments, continuing with fig. 3, 8 and 9, the present embodiment provides a backlight module 200: the thickness of the support structure G in a direction perpendicular to the surface of the frame 1 is equal to the distance between the plane of the second surface 12 and the plane of the fourth surface 14.

It can be understood that, along the direction perpendicular to the surface of the frame 1, the sum of the thickness of the supporting structure G and the thickness of the thinned region A1 is equal to the thickness of the functional region B, and the supporting structure G can be used to support the thinned region A1, so as to prevent a certain gap from being formed between the second surface 12 and the reflective layer 3, which may cause a film wrinkle inside the backlight module 200 during the reliability test of the backlight module 200.

In some alternative embodiments, and with continued reference to fig. 9-12, fig. 10 is a top view of the support structure of fig. 9, fig. 11 is a further top view of the support structure of fig. 9, and fig. 12 is a further top view of the support structure of fig. 9. The backlight module 200 provided in this embodiment: the shape of the orthographic projection of the support structure G on the plane of the first surface 11 is circular, grid or bar.

It can be understood that fig. 10 only exemplifies that the shape of the orthographic projection of the support structure G on the plane of the first surface 11 is a circle, fig. 11 only exemplifies that the shape of the orthographic projection of the support structure G on the plane of the first surface 11 is a square, and fig. 12 only exemplifies that the shape of the orthographic projection of the support structure G on the plane of the first surface 11 is a bar. Optionally, the support structures G are arranged in an array, which is beneficial to simplifying the process. The shape of the orthographic projection of the support structure G on the plane of the first surface 11 is not specifically limited, and the support structure G can be set according to actual conditions, and is not described in detail below.

In some alternative embodiments, continuing with fig. 3, the present embodiment provides a backlight module 200: the functional region B is used for placing an image pickup device or a light emitting device.

It can be understood that a condition functional area B is a functional area B for preventing the camera device, and a hollowed-out area needs to be set, because the hollowed-out position has the limitation of the bending height, and further the functional area B cannot be set to be thinner in the prior art means, so the functional area B for setting the camera device cannot be set to be a thinning area A1, and if the functional area B for setting the camera device is set to be the thinning area A1, the strength of the iron frame is weakened, which affects the quality of the display module 200. In another case, the functional region B is used for placing the light emitting device, and since the functional region B needs to place the light source in the backlight module 200, the light source needs to be fixed in the functional region B, and thus the normal thickness needs to be maintained. That is, the thinning region A1 needs to be disposed in the first region a of the non-functional region B, which is beneficial to improving the quality of the backlight module 200.

In some alternative embodiments, continuing with fig. 3 and 4, the present embodiment provides a backlight module 200: the thickness of the thinning area A1 is t1, the thicknesses of the functional areas B are equal to each other and are all t2, and t1 is more than or equal to 0.5t2 and less than or equal to 0.95t2.

It can be understood that, when the thickness of the thinning area A1 is less than half of the thickness of the functional area B, the difference between the thicknesses of the thinning area A1 and the functional area B is large, and the first transition area A1 cannot make the step difference between the thinning area A1 and the functional area B have a relatively smooth transition, so that the first transition area A1 is easily broken due to stress. And then the thickness of the thinning area A1 is set to be t1, the thickness of the functional area B is equal to t2, t1 is more than or equal to 0.5t2 and less than or equal to 0.95t2, the thickness of the thinning area A1 is in the range of 0.5t2 to 0.95t2, the first transition area A1 cannot enable the section difference between the thinning area A1 and the functional area B to have a relatively gentle transition, and the quality of the backlight module 200 is improved.

The present invention further provides a display device 300 including the backlight module 200 according to any of the above embodiments of the present invention. Referring to fig. 13, fig. 13 is a schematic view of a display device provided by the present invention, and the display device 300 includes the backlight module 200 according to any embodiment of the present invention. The embodiment of fig. 13 is only an example of a mobile phone, and the display device 300 is described, it is to be understood that the display device 300 provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, and the present invention is not limited thereto. The display device 300 provided in the embodiment of the present invention has the beneficial effects of the backlight module 200 provided in the embodiment of the present invention, and specific reference is made to the specific description of the display device in each of the above embodiments, and details in this embodiment are not repeated herein.

By the embodiment, the backlight module and the display device provided by the invention at least realize the following beneficial effects:

according to the backlight module and the display device, the frame body comprises the adjacent functional area and the first area, the first area comprises at least one thinning area, and the thickness of the thinning area is smaller than that of the functional area. The frame body is provided with the thinning area, so that the frame body is locally thinned, the weight can be reduced, and the cost is reduced. Further, the first region further comprises a first transition region, and the first transition region is positioned between the thinning region and the functional region; and in the direction of pointing to the functional region along the thinning region, the first transition region at least comprises a first thickness region and a second thickness region, the second thickness region is positioned at one side of the first thickness region close to the functional region, and the thickness of the first thickness region is smaller than that of the second thickness region. The thickness difference between attenuate region and the functional region exists the difference of section and receives stress fracture easily promptly, set up first transition district between attenuate region and functional region, and first transition district is including being close to the first thickness district of attenuate region one side and the second thickness district that is close to functional region one side, the thickness in first thickness district is less than the thickness of second thickness, first transition district can be so that there is a transition district between attenuate region and the functional region through setting up first thickness district and second thickness district promptly, avoid the great stress of thickness difference between attenuate region and the functional region to take place the fracture easily.

Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A backlight module, comprising:

the frame body comprises a functional area and a first area which are adjacent, the first area comprises at least one thinning area, and the thickness of the thinning area is smaller than that of the functional area;

the first region further comprises a first transition region, the first transition region being located between the thinned region and the functional region;

the thickness of the end, connected with the thinning area, of the first transition area is equal to that of the thinning area, the thickness of the end, connected with the functional area, of the first transition area is equal to that of the functional area, the first transition area points to the functional area along the thinning area, the first transition area at least comprises a first thickness area and a second thickness area, the second thickness area is located on one side, close to the functional area, of the first thickness area, and the thickness of the first thickness area is smaller than that of the second thickness area;

in the direction perpendicular to the functional region, the thinning region comprises a first surface and a second surface which are oppositely arranged;

in the direction perpendicular to the thinning region, the functional region comprises a third surface and a fourth surface which are oppositely arranged;

the first transition zone comprises a first transition surface and a second transition surface which are oppositely arranged; the first transition surface is respectively adjacent to the first surface and the third surface and is positioned on the same horizontal plane; the second transition surface is adjacent to the second surface and the fourth surface, respectively;

wherein the second transition surface is curved to one side of the first transition surface, and the range of the curvature radius R of the second transition surface is more than or equal to 2mm and less than or equal to 1000mm; or the like, or, alternatively,

along the direction that the thinning area points to the functional area, a first included angle alpha is included between the second transition surface and the second surface, and alpha is more than 0 and less than or equal to 0.4 degrees.

2. The backlight module according to claim 1, wherein the thickness of the first transition region increases in sequence along the direction from the thinned region to the functional region.

3. The backlight module according to claim 1,

the first surface and the third surface are adjacent, and the first surface and the third surface are positioned on the same horizontal plane;

the second surface is adjacent to the fourth surface, and a spacing between the first surface and the second surface is less than a spacing between the third surface and the fourth surface.

4. The backlight module according to claim 2, further comprising a housing, wherein the housing at least partially encloses the frame;

the second surface is positioned between the first surface and the shell, and the distance between the second surface and the side, close to the frame body, of the shell is a first distance d1;

the fourth surface is positioned between the third surface and the shell, and the distance between the fourth surface and the side, close to the frame, of the shell is a second distance d2;

wherein d1 > d2.

5. The backlight module as claimed in claim 4, wherein d1-d2 is 0-03 mm.

6. The backlight module according to claim 2, further comprising a housing, the housing enclosing at least a portion of the frame;

the first surface is located between the second surface and the housing, and the third surface is located between the fourth surface and the housing;

the backlight module further comprises a plurality of supporting structures, and the supporting structures are convexly arranged on the second surface.

7. The backlight module according to claim 6, wherein the thickness of the supporting structure is equal to the distance between the plane of the second surface and the plane of the fourth surface along the direction perpendicular to the surface of the frame body.

8. The backlight module according to claim 6, wherein the shape of the orthographic projection of the support structure on the plane of the first surface is circular, grid or strip.

9. A backlight module according to claim 1, wherein the functional regions are used for placing an image pickup device or a light emitting device.

10. The backlight module as claimed in claim 1, wherein the thickness of the thinned region is t1, the thicknesses of the functional regions are equal to t2, and 0.5t2 ≦ t1 ≦ 0.95t2.

11. A display device comprising the backlight module according to any one of claims 1-10.