Backlight module and display device

Abstract

The embodiment of the present application provides a backlight module and a display device. In the backlight module provided by the embodiment of the present application, since the light absorbing portion is arranged at one end of the reflective sheet close to the light incident surface, the light absorbing portion is closer to the light source than the reflective sheet, so that part of the outgoing light from the light source can be absorbed by the light absorbing component of the light absorbing portion, which can reduce the brightness at the light absorbing portion, and further reduce the brightness of the edge of the display area close to the light source in the display device using the backlight module, thereby avoiding the problem of excessive brightness at the edge of the display area. By having at least two concave portions on the side surface of the reflective sheet close to the light source, the end face can be made to have different convexities and concavities, so that at least part of the light incident on the end face is diffusely reflected, which can reduce the degree of light concentration at the end face, thereby reducing the brightness of the end face, and preventing the formation of a clear bright line at the end face of the light absorbing portion, thereby further avoiding the problem of excessive brightness at the edge of the display area.

Description

Technical Field

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

[0002] With the development of display technology, consumers have higher and higher requirements on the appearance of display devices. Currently, the borders of liquid crystal display devices are getting narrower and narrower to ensure the display effect.

[0003] However, for narrow-frame LCD display devices that use edge-type backlight light sources, the narrow frame reduces the distance between the light source and the bottom reflector, resulting in a smaller light mixing distance between the light source and the bottom reflector. Light emitted from the light source tends to gather on the portion of the bottom reflector close to the light source. Since this portion is mostly located outside the display area, the brightness of the edge of the display area close to the light source is too high, affecting the display effect of the display device. Summary of the Invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a backlight module and a display device to solve the technical problem of high brightness at the edge of the display area of ​​the liquid crystal display device in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a backlight module.

[0006] Light guide plate;

[0007] A light source is located on one side of the light incident surface of the light guide plate;

[0008] The reflector is located on the side of the light guide plate away from the light emitting surface. At least one light absorbing portion is provided on the end of the reflector close to the light incident surface. The plane where the reflector is located is a first plane. The first plane is perpendicular to the light incident surface and parallel to the light emitting surface.

[0009] The light absorbing portion includes at least two rows of light absorbing components;

[0010] The first direction is a direction from the light source to the light guide plate; the side surface of the reflective sheet close to the light source has at least two concave portions.

[0011] Optionally, the dimension of the light absorbing portion along the first direction parallel to the first direction is a first dimension, the minimum distance between the orthographic projection of the light absorbing portion on the first plane and the orthographic projection of the light source on the first plane is a second dimension; the first dimension is positively correlated with the second dimension.

[0012] Optionally, along the first direction, the distribution density of the light absorbing components decreases linearly or in a step-wise manner.

[0013] Optionally, the distance between two adjacent recesses is a first spacing, and the first spacing first increases and then decreases in a second direction perpendicular to the first direction.

[0014] Optionally, along the first direction, the light absorbing portion includes at least two light absorbing regions;

[0015] In any two adjacent light absorption regions, the distribution density of the light absorption components in the light absorption region close to the light source is greater than the distribution density of the light absorption components in the light absorption region far from the light source.

[0016] Optionally, along the first direction, the distance between any two adjacent rows of light absorbing components gradually increases.

[0017] Optionally, in any two adjacent rows of light absorbing components, the distance between any two adjacent light absorbing components in the row close to the light source is smaller than the distance between any two adjacent light absorbing components in the other row far from the light source.

[0018] Optionally, the shape of the light absorbing component includes any one of a circle, a square, a rectangle, an ellipse and a triangle.

[0019] Optionally, the ratio of the first size to the second size is not less than 0.03 and not greater than 2;

[0020] The second dimension is not less than 1 mm and not more than 3 mm.

[0021] Optionally, the first distance between any two adjacent recesses is not less than 100 micrometers and not more than 300 micrometers.

[0022] Optionally, along the first direction, the depth of the recess is not less than 10 micrometers and not more than 100 micrometers;

[0023] Along the second direction, the width of the recess is not less than 50 micrometers and not more than 200 micrometers.

[0024] Optionally, along the second direction, a ratio of the width of the recess to the distance between any two adjacent light absorbing components in a row of light absorbing components closest to the light source is in a range of 0.9-1.1.

[0025] In a second aspect, an embodiment of the present application provides a display device, comprising: a display panel and a backlight module as provided in any one of the first aspects.

[0026] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0027] In the backlight module provided in the embodiment of the present application, since the light absorbing portion is arranged at one end of the reflective sheet close to the light incident surface, the light absorbing portion is closer to the light source than the reflective sheet, so that part of the outgoing light from the light source can be absorbed by the light absorbing component of the light absorbing portion, which can reduce the brightness at the light absorbing portion, and further reduce the brightness of the edge of the display area close to the light source direction in the display device using the backlight module, thereby avoiding the problem of excessive brightness at the edge of the display area and ensuring the display effect.

[0028] In the backlight module provided in the embodiment of the present application, by having at least two concave portions on the side surface of the reflective sheet close to the light source, the end face can be made concave and convex with different shapes, so that at least part of the light incident on the end face is diffusely reflected, which can reduce the degree of light concentration on the end face, thereby reducing the brightness of the end face, preventing the formation of obvious bright lines at the end face of the light absorbing portion, and further avoiding the problem of excessive edge brightness of the display area.

[0029] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0031] Figure 1 A schematic structural diagram of a backlight module provided in an embodiment of the present application;

[0032] Figure 2 A schematic structural diagram of a first type of reflective sheet in a backlight module provided in an embodiment of the present application;

[0033] Figure 3 A schematic top view of a second type of reflective sheet in a backlight module provided in an embodiment of the present application;

[0034] Figure 4 A schematic top view of a third type of reflective sheet in a backlight module provided in an embodiment of the present application;

[0035] Figure 5 A schematic top view of a fourth type of reflective sheet in a backlight module provided in an embodiment of the present application;

[0036] Figure 6 Provided in the embodiments of this application Figure 5 An enlarged schematic diagram of region A of the light-absorbing portion of the fourth type of reflector is shown;

[0037] Figure 7 A schematic top view of the fifth type of reflective sheet in the backlight module provided in an embodiment of the present application;

[0038] Figure 8 A schematic structural diagram of a sixth type of reflective sheet in a backlight module provided in an embodiment of the present application;

[0039] Figure 9 A schematic structural diagram of a display device provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 10-light source; 11-first flexible circuit board;

[0042] 20-light guide plate;

[0043] 30-reflective sheet;

[0044] 31-reflection part;

[0045] 32-light absorbing portion; 321-first light absorbing region; 322-second light absorbing region; 323-third light absorbing region; 324-fourth light absorbing region; 325-fifth light absorbing region; 326-light absorbing component; 327-recess;

[0046] 40-back plate; 50-first connecting member; 60-reflecting member;

[0047] 70 - optical film assembly; 71 - first diffuser; 72 - prism sheet; 73 - third diffuser; 80 - light-shielding connector;

[0048] 101-border area;

[0049] 201 - first polarizer; 202 - array substrate; 203 - color filter substrate; 204 - second polarizer; 205 - light shielding element; 206 - driving chip; 207 - second connecting element; 208 - second flexible circuit board. DETAILED DESCRIPTION

[0050] The following describes the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0051] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a," "an," "said," and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of the described features, integers, steps, and / or operations, but does not exclude the implementation of other features, information, data, steps, operations, and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A," or as "B," or as "A and B."

[0052] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0053] First, the relevant technologies involved in this application are described:

[0054] Narrow-bezel displays are those where the distance between the display panel and the body frame is smaller than in conventional settings. Narrow-bezel displays ensure a full display effect.

[0055] For narrow-frame LCD display devices with edge-type backlight light sources, in order to reduce the frame, it is necessary to reduce the distance between the light source and the bottom reflector, which will cause the mixed light distance between the two to become smaller. On the one hand, the outgoing light from the light source is directly incident on the part of the bottom reflector close to the light source through the fixing tape of the light guide plate. On the other hand, the outgoing light from the light source is incident on the part of the bottom reflector close to the light source through the lower surface of the light guide plate, which makes it easy for light to gather on the part of the bottom reflector close to the light source. Since this part is mostly located outside the display area, the brightness of the edge of the display area close to the light source is too high, affecting the display effect of the display device.

[0056] The backlight module and display device provided in this application are aimed at solving the above technical problems in the prior art.

[0057] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0058] The embodiment of the present application provides a backlight module, the structural diagram of which is shown in FIG. Figure 1 As shown, the structural diagram of the first reflector in the backlight module is as follows Figure 2 As shown, the backlight module includes: a light source 10 , a light guide plate 20 and a reflective sheet 30 .

[0059] The light source 10 is located on one side of the light incident surface of the light guide plate 20; the reflective sheet 30 is located on the side of the light guide plate 20 away from the light emitting surface, and at least one light absorbing portion 32 is provided at one end of the reflective sheet 30 close to the light incident surface. The plane where the reflective sheet 30 is located is a first plane, the first plane is perpendicular to the light incident surface, and the first plane is parallel to the light emitting surface; wherein the light absorbing portion 32 includes at least two rows of light absorbing components 326; the first direction is the direction along the light source 10 pointing to the light guide plate 20; the side surface of the reflective sheet 30 close to the light source 10 has at least two recesses.

[0060] In the backlight module provided in the embodiment of the present application, since the light absorbing portion 32 is arranged at one end of the reflective sheet 30 close to the light incident surface, the light absorbing portion 32 is closer to the light source 10 than the reflective sheet 30, so that part of the outgoing light from the light source 10 can be absorbed by the light absorbing component of the light absorbing portion 32, which can reduce the brightness at the light absorbing portion 32, and further reduce the brightness of the edge of the display area close to the light source 10 in the display device using the backlight module, thereby avoiding the problem of excessive brightness at the edge of the display area and ensuring the display effect.

[0061] In the backlight module provided in the embodiment of the present application, by having at least two recesses 327 on the side surface of the reflective sheet 30 close to the light source 10, the end face can be made concave and convex with different shapes, so that at least part of the light incident on the end face is diffusely reflected, which can reduce the degree of light concentration on the end face, thereby reducing the brightness of the end face, preventing the formation of a clear bright line at the end face of the light absorbing portion 32, and further avoiding the problem of excessive brightness at the edge of the display area.

[0062] In the embodiment of the present application, the light source 10 is an edge-entry light source, that is, the backlight module is an edge-entry type. The light source 10 is located on one side of the light incident surface of the light guide plate 20, such as Figure 1 As shown, the light incident surface of the light guide plate 20 faces the light source 10 . Optionally, the light incident surface of the light guide plate 20 is an end surface facing the light source 10 .

[0063] In the embodiment of this application, Figure 1 As shown, the reflective sheet 30 is located on the side of the light guide plate 20 away from the light emitting surface. Optionally, as shown in FIG. Figure 1 As shown, the backlight module includes a back plate 40, and the back plate 40 includes a bottom plate and an L-shaped bent portion connected to the bottom plate. Optionally, a reflective sheet 30 is provided on one side of the bottom plate, and a light transmission medium layer is provided between the reflective sheet 30 and the light guide plate 20. Optionally, the light transmission medium layer includes air between the reflective sheet 30 and the light guide plate 20. Figure 1 As shown, the light emitting surface is a side surface of the light guide plate 20 away from the bottom plate of the back plate 40 , and the light incident surface is the end surface of the light guide plate 20 facing the light source 10 .

[0064] In the embodiment of this application, Figure 1 As shown, at least one light absorbing portion 32 is provided at one end of the reflective sheet 30 close to the light incident surface, and the light absorbing portion 32 includes at least two rows of light absorbing components 326 .

[0065] Optionally, the reflective sheet 30 includes a reflective portion 31 and a light absorbing portion 32 that are disposed in the same layer and integrally formed. The light absorbing portion 32 is closer to the light source 10 than the reflective portion 31 of the reflective sheet 30. Thus, the light absorbing component 326 of the light absorbing portion 32 can absorb a portion of the light emitted by the light source 10, thereby reducing the brightness at the light absorbing portion 32. Furthermore, the brightness at the edge of the display area of ​​the display device using the backlight module near the light source 10 can be reduced, thereby avoiding the problem of excessive brightness at the edge of the display area and ensuring the display effect.

[0066] In the embodiment of the present application, the plane where the reflective sheet 30 is located is defined as a first plane, which is perpendicular to the light incident surface and parallel to the light emitting surface; the first direction is the direction along the light source 10 pointing to the light guide plate 20; the second direction is a direction perpendicular to the first plane, the light emitting surface and the first direction, and the second direction is parallel to the light incident surface.

[0067] Optionally, the orthographic projection of the light absorbing portion 32 on the first plane is located between the orthographic projection of the reflecting portion 31 on the first plane and the orthographic projection of the light source 10 on the first plane, so that the light absorbing portion 32 is closer to the light source 10 than the reflecting portion 31, as shown in FIG. Figure 1 As shown, the light absorbing portion 32 is located in the frame area 101, and the light absorbing portion 32 is closer to the light source 10 than the reflecting portion 31. Therefore, in the process of the outgoing light of the light source 10 being incident on the reflecting plate 30, part of the outgoing light of the light source 10 can be absorbed by the light absorbing portion 32, which can reduce the brightness at the light absorbing portion 32, and then can reduce the brightness of the edge of the display area close to the light source 10, which can avoid the problem of excessive brightness at the edge of the display area and ensure the display effect.

[0068] It should be noted that if Figure 1 As shown, in order to facilitate intuitive understanding of the relationship between the backlight module and the display area of ​​the display panel in the display device using the backlight module provided by the embodiment of the present application, Figure 1 The frame area 101 of the frame corresponding to the display device is marked in FIG, and the area outside the frame area 101 is the display area, that is, Figure 1 The dotted line on the left side of the figure represents the boundary between the frame area 101 and the display area.

[0069] Alternatively, as Figure 1 As shown, the orthographic projection of the light absorbing portion 32 on the back plate 40 is located between the orthographic projection of the reflecting portion 31 on the back plate 40 and the orthographic projection of the light source 10 on the back plate 40 .

[0070] Alternatively, as Figure 1 As shown, in the embodiment of the present application, the light absorbing portion 32 is located in the frame area 101, thereby preventing the light absorbing portion 32 from affecting the light in the display area.

[0071] Optionally, in the embodiment of the present application, the light absorbing portion 32 is provided with at least two rows of light absorbing components. Optionally, the light absorbing components are light absorbing ink dots.

[0072] Optionally, in an embodiment of the present application, the light absorbing portion 32 and the reflecting portion 31 may include the same material, and the reflective sheet body is made of a metal aluminum plate, and ink is printed in a set area of ​​the reflective sheet body to form a light absorbing component. The part corresponding to the area where the light absorbing component is located is the light absorbing portion 32, and the part outside the set area is the reflecting portion 31.

[0073] Optionally, in the embodiment of the present application, a printing process may be used to form a light absorbing component as light absorbing ink dots on one side of the light absorbing portion 32 .

[0074] In the embodiment of this application, Figure 2 As shown, the side surface of the reflective sheet 30 close to the light source 10 has at least two recesses 327 .

[0075] Alternatively, as Figure 2 As shown, a plurality of recesses 327 are provided at one end of the light absorbing portion 32 away from the reflecting portion 31, so that the end face of the light absorbing portion 32 facing the light source 10 is uneven, so that the light incident on the end face is diffusely reflected, which can reduce the degree of light concentration on the end face, thereby reducing the brightness of the end face, preventing a clear bright line from being formed at the end face of the light absorbing portion, and further avoiding the problem of excessive brightness at the edge of the display area.

[0076] Optionally, in one embodiment of the present application, the dimension of the light absorbing portion 32 along the first direction parallel to the first direction is a first dimension, and the minimum distance between the orthographic projection of the light absorbing portion 32 on the first plane and the orthographic projection of the light source 10 on the first plane is a second dimension; the first dimension is positively correlated with the second dimension.

[0077] In the embodiment of this application, Figure 1 As shown, the dimension of the light absorbing portion 32 along the first direction parallel to the first direction is a first dimension L1 , and the minimum distance between the orthographic projection of the light absorbing portion 32 on the first plane and the orthographic projection of the light source 10 on the first plane is a second dimension L2 .

[0078] In the embodiment of the present application, the first dimension L1 is positively correlated with the second dimension L2. Since the size of the second dimension L2 is related to the border width of the display device, the specific value of the first dimension L1 of the light absorbing portion 32 can be set according to borders of different widths, so that the backlight module provided in the embodiment of the present application can be suitable for display devices with borders of different specifications.

[0079] Optionally, in one embodiment of the present application, along the first direction, the distribution density of the light absorbing components 327 decreases linearly or in a step-by-step manner.

[0080] In the embodiment of the present application, the distribution density of the light absorbing components 327 refers to the ratio of the sum of the areas of all the light absorbing components in any area of ​​the light absorbing portion 32 to the area of ​​the area.

[0081] In the embodiment of the present application, along the first direction, the distribution density of the light absorbing component 327 decreases linearly or in a step-by-step manner, so that the light absorption performance of the light absorbing portion 32 close to the light source 10 is greater than the light absorption performance of the area far away from the light source 10, so that the light absorption performance of the light absorbing portion 32 along the first direction decreases as the intensity of the light emitted by the light source 10 decreases, which helps to improve the uniformity of light mixing of the light emitted by the light source 10.

[0082] In the embodiments of this application, the distribution density of the light-absorbing components along the first direction is reduced in two ways: the first is a linear decrease in the distribution density of the light-absorbing components, and the second is a step-wise decrease in the distribution density of the light-absorbing components. The second method is used below to illustrate how the distribution density of the light-absorbing components along the first direction changes.

[0083] Those skilled in the art understand that along the first direction, that is, along the direction in which the light source 10 points to the light guide plate 20, the intensity of the light emitted by the light source 10 gradually decreases. By setting the light absorption performance of the light absorption portion 32 close to the light source 10 to be greater than the light absorption performance of the area away from the light source 10, the light absorption performance of the light absorption portion 32 along the first direction decreases in a step-like manner as the intensity of the light emitted by the light source 10 decreases, which helps to improve the light mixing uniformity of the light emitted by the light source 10 and can avoid the situation where the brightness between the light source 10 and the display area decreases sharply.

[0084] Optionally, along the first direction, the light absorbing portion 32 includes a plurality of light absorbing areas, and the distribution density of the light absorbing components in the light absorbing area close to the light source 10 is greater than the distribution density of the light absorbing components in the light absorbing area far from the light source 10. The difference in the distribution density of any two adjacent light absorbing areas is the same, so that the distribution density of the light absorbing components in the light absorbing portion 32 decreases in a step-by-step manner, so that the light absorbing performance of the light absorbing portion 32 decreases in a step-by-step manner in the direction from the light source 10 to the light guide plate 20, which helps to improve the uniformity of light mixing of the light emitted by the light source 10, and can avoid the rapid decrease in brightness between the light source 10 and the display area while avoiding excessive brightness at the edge of the display area.

[0085] Alternatively, as Figure 3 As shown, in one embodiment of the present application, along the first direction, the light absorbing portion 32 includes at least two light absorbing areas; in any two adjacent light absorbing areas, the distribution density of the light absorbing components 327 in the light absorbing area close to the light source 10 is greater than the distribution density of the light absorbing components 327 in the light absorbing area far from the light source 10.

[0086] In the embodiment of this application, Figure 3As shown, optionally, the light absorption portion 32 includes five light absorption regions, namely a first light absorption region 321 , a second light absorption region 322 , a third light absorption region 323 , a fourth light absorption region 324 and a fifth light absorption region 325 .

[0087] like Figure 3 As shown, along the direction of the light source 10 pointing to the light guide plate 20, that is, along the first direction, the first light absorption area 321, the second light absorption area 322, the third light absorption area 323, the fourth light absorption area 324 and the fifth light absorption area 325 are arranged in sequence.

[0088] In the embodiment of the present application, in any two adjacent light absorption regions, the distribution density of the light absorption components in the light absorption region close to the light source 10 is greater than the distribution density of the light absorption components in the light absorption region far from the light source 10 .

[0089] Alternatively, as Figure 3 As shown in FIG, the density of ink dots in each light absorption area represents the distribution density of the light absorption components. Figure 3 As shown, the distribution density of the light absorbing components in the first light absorbing area 321, the second light absorbing area 322, the third light absorbing area 323, the fourth light absorbing area 324 and the fifth light absorbing area 325 decreases successively, so that the light absorbing performance of the light absorbing portion 32 decreases in a step-by-step manner in the direction along the light source 10 pointing to the light guide plate 20, so that the changing trend of the light absorbing performance of the light absorbing portion 32 matches the trend of light reduction, which helps to improve the light mixing uniformity of the light emitted by the light source 10, and can avoid the rapid decrease in brightness between the light source 10 and the display area while avoiding excessive brightness at the edge of the display area.

[0090] Optionally, in one embodiment of the present application, the light absorbing portion 32 may include three light absorbing regions, and along the first direction, the distribution densities of the light absorbing components in the three light absorbing regions are 40%, 25% and 20%, respectively.

[0091] Optionally, in one embodiment of the present application, the light absorbing portion 32 may include three light absorbing regions, and along the first direction, the distribution densities of the light absorbing components in the three light absorbing regions are 30%, 15% and 10%, respectively.

[0092] Optionally, in one embodiment of the present application, the light absorbing portion 32 may include two light absorbing regions, and along the first direction, the distribution densities of the light absorbing components in the three light absorbing regions are 60% and 20%, respectively.

[0093] Optionally, in one embodiment of the present application, the light absorbing portion 32 may include multiple light absorbing regions. Along the first direction, the distribution density of the light absorbing components in the light absorbing region closest to the light source 10 is 60%, the distribution density of the light absorbing components in the light absorbing region farthest from the light source 10 is 20%, and the distribution density of the light absorbing components in the light absorbing region located between the two light absorbing regions may be the same.

[0094] Optionally, in the light absorbing region of the light absorbing portion 32 in each of the above embodiments, the shape of each light absorbing component 326 may be at least one of circular and rectangular.

[0095] Alternatively, as Figure 4 、 Figure 5 and Figure 7 As shown, in one embodiment of the present application, the light absorbing portion 32 includes at least two rows of light absorbing components 326 parallel to the extension direction of the light source 10 .

[0096] In the embodiment of this application, Figure 4 、 Figure 5 and Figure 7 As shown, the light absorbing portion 32 includes at least two rows of light absorbing components 326. Optionally, as Figure 3 and Figure 4 As shown, the light absorbing portion 32 includes six rows of light absorbing components 326, such as Figure 6 As shown, the light absorbing portion 32 includes five rows of light absorbing components 326. In the embodiment of the present application, a row refers to a direction parallel to the extending direction of the light source 10, that is, the extending direction of the row is perpendicular to the first direction.

[0097] In the embodiment of this application, Figure 6 As shown, the distance between two adjacent rows of light absorbing components 326 is a spacing B1, the distance between two adjacent light absorbing components 326 in the same row of light absorbing components 326 is a spacing B2, and the size of the light absorbing component 326 is B3.

[0098] In the embodiment of this application, for Figure 4 、 Figure 5 and Figure 7 As for the reflective sheet 30 shown, the light absorbing area of ​​the light absorbing portion 32 includes at least one row of light absorbing components 326. By controlling the spacing B1 and the spacing B2, the distribution density of the light absorbing components 326 in different light absorbing areas can be controlled, so that the distribution density of the light absorbing components 326 in the light absorbing portion 32 changes along the first direction.

[0099] Optionally, in an embodiment of the present application, the spacing B1 between two adjacent rows of light absorbing components 326 is not less than 0.07 mm and not greater than 0.1 mm. The change in the distribution density of the light absorbing components 326 in the light absorbing portion 32 can ensure the degree of change in the distribution density of the light absorbing components 326 and avoid the situation where the distribution density of the light absorbing components 326 changes too much.

[0100] Alternatively, as Figure 4 、 Figure 5 and Figure 7 As shown, in one embodiment of the present application, along the first direction, the distance between any two adjacent rows of light absorbing components 326 gradually increases.

[0101] In the embodiment of this application, Figure 4 、 Figure 5 and Figure 7 As shown, along the first direction, the spacing B1 between any two adjacent rows of light absorbing components 326 gradually increases, so that the distribution density of the light absorbing components 326 along the first direction gradually decreases, so that by controlling the spacing B1, the distribution density of the light absorbing components 326 in different light absorbing areas can be controlled, so that along the first direction, the distribution density of the light absorbing components 326 in the light absorbing part 32 changes.

[0102] Optionally, each light absorbing area of ​​the light absorbing portion 32 includes at least two rows of light absorbing components 326. In the same light absorbing area, the spacing B1 between any two adjacent rows of light absorbing components 326 is the same, so that the distribution density of the light absorbing components 326 decreases in a step-like manner in the first direction.

[0103] Optionally, each light absorbing area of ​​the light absorbing portion 32 includes at least two rows of light absorbing components 326. In the same light absorbing area, the spacing B1 between any two adjacent rows of light absorbing components 326 decreases linearly along the direction from the light source 10 to the light guide plate 20, so that in the first direction, the distribution density of the light absorbing components 326 decreases linearly.

[0104] Optionally, along the first direction, the spacing B1 between any two adjacent rows of light absorbing components 326 decreases in a step-like manner or linearly; in all rows of light absorbing components 326, the spacing B2 between any two adjacent light absorbing components 326 is the same, thereby facilitating the arrangement of the light absorbing components 326 and facilitating the manufacture of the light absorbing portion 32.

[0105] Alternatively, as Figure 4 、 Figure 5 and Figure 7 As shown, in one embodiment of the present application, in any two adjacent rows of light absorbing components 326, the distance between any two adjacent light absorbing components 326 in a row close to the light source 10 is smaller than the distance between any two adjacent light absorbing components 326 in the other row away from the light source 10.

[0106] In the embodiment of this application, Figure 4 、 Figure 5 and Figure 7As shown, in any two adjacent rows of light absorbing components 326, the spacing B2 between any two adjacent light absorbing components 326 in a row close to the light source 10 is smaller than the spacing B2 between any two adjacent light absorbing components 326 in the other row far away from the light source 10. Therefore, by controlling the spacing B2, the distribution density of the light absorbing components 326 in different light absorbing areas can be controlled, so that the distribution density of the light absorbing components 326 in the light absorbing portion 32 changes along the first direction.

[0107] Optionally, the spacing B1 between any two adjacent rows of light absorbing components 326 is the same, and in any two adjacent rows of light absorbing components 326, the spacing B2 between any two adjacent light absorbing components 326 in a row close to the light source 10 is smaller than the spacing B2 between any two adjacent light absorbing components 326 in another row far away from the light source 10. Therefore, by controlling the spacing B2, the arrangement of the light absorbing components 326 can be facilitated, and the manufacture of the light absorbing part 32 can be facilitated.

[0108] Optionally, the light absorbing portion 32 includes multiple light absorbing areas, each light absorbing area includes at least two rows of light absorbing components 326, and in the same light absorbing area, the spacing B2 of the light absorbing components 326 in all rows of light absorbing components 326 is the same; in any two adjacent light absorbing areas, the spacing B2 between the two light absorbing components 326 in the light absorbing area close to the light source 10 is smaller than the spacing B2 between the two light absorbing components 326 in the other light absorbing area away from the light source 10.

[0109] Optionally, in one embodiment of the present application, the shape of the light absorbing component 326 includes any one of a circle, a square, a rectangle, an ellipse and a triangle.

[0110] Optionally, in the embodiment of the present application, Figure 4 and Figure 5 As shown, the shape of the light absorbing component 326 is circular; Figure 7 As shown, the light absorbing component 326 is square in shape. Those skilled in the art can set the shape of the light absorbing component 326 according to actual needs. Optionally, the light absorbing portion 32 can include light absorbing components 326 of different shapes.

[0111] Optionally, in the embodiment of the present application, the light absorbing component 326 includes a light absorbing material. Optionally, the light absorbing portion 32 includes a main body portion made of the same material as the reflective portion 31 , and the light absorbing material is printed on the main body portion to form the light absorbing component 326 .

[0112] Optionally, the light-absorbing material includes ink. Optionally, the light-absorbing material may also include the material of the black matrix in the color filter substrate.

[0113] Optionally, the light absorbing material covers the entire surface of the light absorbing portion 32 , so that the light absorption of the entire light absorbing portion 32 can be uniform.

[0114] Optionally, in the embodiment of the present application, for the light absorbing components 326 in the same row, all the light absorbing components 326 have the same shape and size.

[0115] Optionally, the dimension B3 of the light absorbing component 326 is not less than 0.05 mm and not greater than 0.12 mm; for a circular light absorbing component 326, the dimension B3 of the light absorbing component 326 is the diameter; for a square or rectangular light absorbing component 326, the dimension B3 of the light absorbing component 326 is the length of one side.

[0116] Optionally, in one embodiment of the present application, the ratio of the first dimension L1 to the second dimension L2 is not less than 0.03 and not greater than 2.

[0117] In the embodiment of the present application, the first dimension L1 and the second dimension L2 are first values, and the first value is not less than 0.03 and not greater than 2.

[0118] Optionally, in the embodiment of the present application, the second dimension L2 is not less than 1 mm and not greater than 3 mm. While ensuring that the light source 10 and the reflecting portion 31 of the reflecting sheet 30 have a certain light mixing distance, it can avoid the distance between the light source 10 and the reflecting portion 31 of the reflecting sheet 30 being too large, thereby enabling the backlight module to be applied to a display device with a narrow frame.

[0119] Optionally, since the first value is not less than 0.03 and not greater than 2, and the second dimension L2 is not less than 1 mm and not greater than 3 mm, it can be concluded that in the embodiment of the present application, the first dimension L1 is not less than 0.1 mm and not greater than 2 mm.

[0120] Optionally, in one embodiment of the present application, the distribution density of the recesses 327 is the same in any area of ​​the end surface of the light absorbing portion 32 .

[0121] In the embodiment of the present application, by setting the distribution density of the inner recesses 327 on the end surface of the light absorbing portion 32 to be the same, the manufacture of the light absorbing portion 32 is facilitated, the uniformity of the diffuse reflection effect of the end surface can be guaranteed, and the appearance of areas with excessive brightness on the end surface of the light absorbing portion 32 can be avoided.

[0122] Optionally, in the embodiment of the present application, the shape of the recess 327 may include any one of a triangle, a trapezoid, a semicircle and a square. Those skilled in the art may set the shape of the recess 327 according to actual needs.

[0123] In the embodiment of this application, Figure 2 As shown, the concave portions 327 are combined to form a sawtooth-shaped diffuse reflection structure.

[0124] Optionally, in one embodiment of the present application, the first distance between any two adjacent recesses 327 is not less than 100 micrometers and not more than 300 micrometers.

[0125] In the embodiment of this application, Figure 2 As shown, the first pitch P is the distance between any two adjacent recesses 327 . In the embodiment of the present application, the first pitch P is also the arrangement period of the recesses 327 .

[0126] Optionally, the first pitch P is not less than 100 micrometers and not more than 300 micrometers, thereby ensuring that the end surface of the light absorbing portion 32 has a better diffuse reflection effect.

[0127] Optionally, in one embodiment of the present application, along the first direction, the depth of the recess 327 is not less than 10 microns and not more than 100 microns; along the second direction perpendicular to the first direction, the width of the recess 327 is not less than 50 microns and not more than 200 microns.

[0128] In the embodiment of this application, Figure 2 As shown, the depth of the concave portion 327 along the first direction is the depth C1 of the concave portion 327 . Optionally, the depth C1 of the concave portion 327 is not less than 10 micrometers and not more than 100 micrometers.

[0129] In the embodiment of this application, Figure 2 As shown, the second direction is perpendicular to the first direction and the first plane of the reflector 30. The distance between the two vertices of the concave portion 327 along the second direction is the width C2 of the concave portion 327. Optionally, the width C2 of the concave portion 327 is not less than 50 microns and not more than 200 microns.

[0130] Alternatively, as Figure 8 As shown, in one embodiment of the present application, the distance between two adjacent recesses 327 is a first pitch P, and the first pitch P first increases and then decreases in a second direction perpendicular to the first direction.

[0131] In the embodiment of this application, Figure 8 As shown, the end surface (ie, the side surface) of the light absorbing portion 32 is provided with at least two recesses 327 with different arrangement periods and sizes. Figure 8 As shown, along the second direction, the concave portion 327 located in the middle is the first type of concave portion 327 , and the concave portions 327 located at both ends are the second type of concave portions 327 .

[0132] In the embodiment of the present application, along the second direction, the first spacing P first increases and then decreases.

[0133] Optionally, the first pitch P of the first type of recesses 327 is not less than 200 microns and not more than 300 microns, the depth C1 of the first type of recesses 327 is not less than 10 microns and not more than 50 microns, and the width C2 of the first type of recesses 327 is not less than 50 microns and not more than 100 microns. Optionally, the first pitch P of the second type of recesses 327 is not less than 100 microns and not more than 200 microns, the depth C1 of the second type of recesses 327 is not less than 50 microns and not more than 100 microns, and the width C2 of the second type of recesses 327 is not less than 100 microns and not more than 200 microns.

[0134] Alternatively, as Figure 8 As shown, in the end surface of the light absorbing portion 32 , the first pitch P gradually decreases in the direction from the center to the two ends.

[0135] Optionally, in the end surface of the light absorbing portion 32 , the first pitch P gradually decreases in a direction from the center toward the upper surface of the light absorbing portion 32 and in a direction from the center toward the lower surface of the light absorbing portion 32 .

[0136] Optionally, in one embodiment of the present application, along the second direction, the width of the recess 327 has a linear relationship with the distance between any two adjacent light absorbing components 326 in a row of light absorbing components 326 closest to the light source 10 .

[0137] Optionally, along a second direction perpendicular to the first direction, a ratio of a width C2 of the recess 327 to a distance between any two adjacent light absorbing components 326 in a row of light absorbing components 326 closest to the light source 10 is in a range of 0.9-1.1.

[0138] Optionally, the width C2 of the recess 327 is equal to the distance between any two adjacent light absorbing components 326 in a row closest to the light source 10 .

[0139] In the embodiment of the present application, since the area between any two adjacent light absorbing components 326 in the light absorbing portion 32 is not covered by the light absorbing material, the reflectivity of the area is relatively large, so that more light is reflected in the area. In the embodiment of the present application, by setting the ratio of the width C2 of the recess 327 to the distance between any two adjacent light absorbing components 326 in a row of light absorbing components 326 closest to the light source 10 to be in the range of 0.9-1.1, a part of the light can be diffusely reflected through the recess 327, thereby reducing the light in the area and reducing the brightness of the area.

[0140] At the same time, the recess 327 can diffusely reflect part of the light incident on the end face of the light absorbing portion 32 between the two light absorbing components 326, thereby increasing the diffuse reflection performance of the end face to this part of the light, thereby further reducing the brightness at the end face, and further avoiding the problem of excessive brightness at the end face of the light absorbing portion 32.

[0141] Alternatively, as Figure 1 As shown, in one embodiment of the present application, the backlight module further includes: a first flexible circuit board 11 , a first connecting member 50 , a reflective member 60 , an optical film material group 70 and a light-shielding connecting member 80 .

[0142] In the embodiment of this application, Figure 1 As shown, the back plate 40 includes a bottom plate and an L-shaped bent portion connected to the bottom plate. Optionally, the material of the back plate 40 includes metal, and the bottom plate and the bent portion are integrally formed.

[0143] The first flexible circuit board 11 and the reflective sheet 30 are arranged on one side of the bottom plate. The light source 10 is arranged on the side of the first flexible circuit board 11 away from the bottom plate. The first flexible circuit board 11 is electrically connected to the light source 10. Optionally, the light source 10 is an LED (Light Emitting Diode).

[0144] like Figure 1 As shown, a first connecting member 50 is further provided on one side of the first flexible circuit board 11 , and the light guide plate 20 and the first flexible circuit board 11 are fixedly connected by the first connecting member 50 . Optionally, the connecting member is an adhesive tape.

[0145] like Figure 1 As shown, the reflector 60 is arranged on the side of the bent portion facing the bottom plate, and the orthographic projection of the reflector 60 on the bottom plate covers the orthographic projection of the light source 10 on the bottom plate to reflect part of the emitted light from the light source 10 and improve the utilization rate of the light source 10.

[0146] like Figure 1 As shown, an optical film assembly 70 is provided on a side of the light guide plate 20 away from the reflective sheet 30 . Optionally, the optical film assembly 70 includes a first diffusion sheet 71 , a prism sheet 72 and a third diffusion sheet 73 stacked in sequence.

[0147] like Figure 1 As shown, the light-shielding connector 80 is disposed on the side of the bent portion away from the base plate. The orthographic projection of the light-shielding connector 80 on the base plate covers a portion of the optical film assembly 70, a portion of the light guide plate 20, and a portion of the light-absorbing portion 32. Optionally, the light-shielding connector 80 is a light-shielding tape. The light-shielding connector 80 not only provides light shielding but also securely connects the backlight module and the display panel.

[0148] It should be noted that, in the embodiments of the present application, Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 and Figure 8 As shown, six light absorbing parts 32 with different structures are provided. Those skilled in the art can combine at least two of the six light absorbing parts 32 according to actual needs.

[0149] Based on the same inventive concept, the embodiment of the present application provides a display device. The structural diagram of the display device is as follows: Figure 9 As shown, the display device includes: a display panel and a backlight module provided in any one of the above embodiments.

[0150] In the embodiment of the present application, since the display device adopts any one of the backlight modules provided in the aforementioned embodiments, its principles and technical effects can be referred to in the aforementioned embodiments and will not be described in detail here.

[0151] Optionally, in an embodiment of the present application, the display device includes a narrow-frame liquid crystal display.

[0152] In the embodiment of this application, Figure 9 As shown, the display panel includes a first polarizer 201 , an array substrate 202 , a color filter substrate 203 and a second polarizer 204 stacked in sequence on one side of the backlight module.

[0153] Optionally, in an embodiment of the present application, the positive projection of the light absorbing portion 32 on the array substrate 202 in the display panel is located outside the display area, thereby reducing the brightness of the edge of the display area while avoiding the light absorbing portion 32 absorbing the light incident to the display area, thereby ensuring the display brightness of the display device.

[0154] In the embodiment of this application, Figure 9 As shown, the display device further includes a light shielding member 205 disposed on a side of the array substrate 202 away from the backlight module to reduce the probability of light transmitted through the first polarizer 201 and the array substrate 202 being incident on the frame area 101 .

[0155] In the embodiment of this application, Figure 9 As shown, the display device further includes a driving chip 206 , a second connecting member 207 and a second flexible circuit board 208 . Optionally, the driving chip 206 is a PCB (Printed Circuit Board).

[0156] like Figure 9 As shown, the driver chip 206 is disposed on the other side of the base plate away from the display panel. The driver chip 206 is fixedly connected to the base plate via a second connector 207. Optionally, the second connector 207 is an adhesive tape. One end of a second flexible circuit board 208 is bonded to the array substrate 203, and the other end is bonded to the driver chip 206.

[0157] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0158] In the backlight module provided in the embodiment of the present application, since the light absorbing portion 32 is arranged at one end of the reflective sheet 30 close to the light incident surface, the light absorbing portion 32 is closer to the light source 10 than the reflective sheet 30, so that part of the outgoing light from the light source 10 can be absorbed by the light absorbing component of the light absorbing portion 32, which can reduce the brightness at the light absorbing portion 32, and further reduce the brightness of the edge of the display area close to the light source 10 in the display device using the backlight module, thereby avoiding the problem of excessive brightness at the edge of the display area and ensuring the display effect.

[0159] In the backlight module provided in the embodiment of the present application, by having at least two recesses 327 on the side surface of the reflective sheet 30 close to the light source 10, the end face can be made concave and convex with different shapes, so that at least part of the light incident on the end face is diffusely reflected, which can reduce the degree of light concentration on the end face, thereby reducing the brightness of the end face, preventing the formation of a clear bright line at the end face of the light absorbing portion 32, and further avoiding the problem of excessive brightness at the edge of the display area.

[0160] In the backlight module provided in the embodiment of the present application, the distribution density of the light absorbing component 327 decreases linearly or stepwise along the first direction, so that the light absorption performance of the light absorbing portion 32 close to the light source 10 is greater than the light absorption performance of the area away from the light source 10, thereby gradually reducing the light absorption performance of the light absorbing portion 32 along the first direction, which helps to improve the uniformity of light mixing of the light emitted by the light source 10.

[0161] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in this application may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0162] In the description of this application, the words "center", "upper", "lower", "front", "back",

[0163] The directions or positional relationships indicated are based on the exemplary directions or positional relationships shown in the accompanying drawings and are intended to facilitate or simplify the description of the embodiments of the present application. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0164] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0165] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0166] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0167] It should be understood that, although the various steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, the order of implementation of these steps is not limited to the order indicated by the arrows. Unless otherwise clearly stated herein, in some implementation scenarios of the embodiments of the present application, the steps in each process can be performed in other orders as required. Moreover, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, or may be executed at different times in different scenarios at the execution time. The execution order of these sub-steps or stages may be flexibly configured as required, and the embodiments of the present application do not limit this.

[0168] The above is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application also fall within the protection scope of the embodiments of the present application.

Claims

1. A backlight module, characterized in that: include: Light guide plate; a light source, located on one side of the light incident surface of the light guide plate; A reflective sheet is located on a side of the light guide plate away from the light emitting surface, and at least one light absorbing portion is provided on an end of the reflective sheet close to the light incident surface. The plane on which the reflective sheet is located is a first plane, the first plane is perpendicular to the light incident surface, and the first plane is parallel to the light emitting surface; wherein, The light absorbing portion includes at least two rows of light absorbing components; The first direction is a direction along the light source pointing toward the light guide plate; the side surface of the reflective sheet close to the light source has at least two recesses; Along a second direction perpendicular to the first direction, a ratio of the width of the recess to the distance between any two adjacent light absorbing components in a row of light absorbing components closest to the light source is in a range of 0.9-1.

1.

2. The backlight module according to claim 1, wherein: The dimension of the light absorbing portion along the first direction parallel to the first direction is a first dimension, and the minimum distance between the orthographic projection of the light absorbing portion on the first plane and the orthographic projection of the light source on the first plane is a second dimension; The first size is positively correlated with the second size.

3. The backlight module according to claim 1, wherein: Along the first direction, the distribution density of the light absorbing components decreases linearly or in a step-wise manner.

4. The backlight module according to claim 1, wherein: The distance between two adjacent recesses is a first spacing, and the first spacing first increases and then decreases in a second direction perpendicular to the first direction.

5. The backlight module according to claim 1, wherein: Along the first direction, the light absorbing portion includes at least two light absorbing regions; In any two adjacent light absorption regions, the distribution density of the light absorption components in the light absorption region close to the light source is greater than the distribution density of the light absorption components in the light absorption region far from the light source.

6. The backlight module according to claim 1, wherein: Along the first direction, the distance between any two adjacent rows of the light absorbing components gradually increases.

7. The backlight module according to claim 1, wherein: In any two adjacent rows of the light absorbing components, the distance between any two adjacent light absorbing components in the row close to the light source is smaller than the distance between any two adjacent light absorbing components in the other row far from the light source.

8. The backlight module according to claim 1, wherein: The shape of the light absorbing component includes any one of circular, square, rectangular, elliptical and triangular.

9. The backlight module according to claim 2, wherein: The ratio of the first size to the second size is not less than 0.03 and not greater than 2; The second dimension is not less than 1 mm and not more than 3 mm.

10. The backlight module according to claim 1, wherein: The first distance between any two adjacent recesses is not less than 100 micrometers and not more than 300 micrometers.

11. The backlight module according to claim 1, wherein: Along the first direction, the depth of the recess is not less than 10 micrometers and not more than 100 micrometers; Along the second direction, the width of the recess is not less than 50 micrometers and not more than 200 micrometers.

12. A display device, characterized in that: include: A display panel and a backlight module as claimed in any one of claims 1 to 11.

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