CN212460267U

CN212460267U - Reflector plate and backlight module

Info

Publication number: CN212460267U
Application number: CN202021552957.4U
Authority: CN
Inventors: 程显荣; 于昊
Original assignee: BOE Technology Group Co Ltd; Gaochuang Suzhou Electronics Co Ltd
Current assignee: BOE Technology Group Co Ltd; Gaochuang Suzhou Electronics Co Ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2021-02-02
Anticipated expiration: 2030-07-30

Abstract

A reflector plate and a backlight module are provided, wherein the reflector plate comprises a body part, and a first side plate, a second side plate, a third side plate and a fourth side plate which are arranged around the body part, the first side plate and the second side plate are arranged oppositely, the third side plate and the fourth side plate are arranged oppositely, the body part is provided with a plurality of lamp holes, and the body part is provided with a plurality of lamp holes; at least one lamp hole located at the edge position of the body part is provided with a light blocking part, at least one side surface of the light blocking part is provided with a light absorbing material, and the lamp hole located at the edge position of the body part comprises one or more of the following components: a first edge light hole, a second edge light hole, a third edge light hole and a fourth edge light hole; the ith edge light hole is adjacent to the ith side plate, the light blocking part of the ith edge light hole is positioned at the edge of one side of the ith edge light hole close to the ith side plate, and i is between 1 and 4. The utility model discloses an emergent light that the part that is in the light absorbed partial lens reduces screen edge light beam, has eliminated the bright limit that the screen produced all around, has improved the display quality.

Description

Reflector plate and backlight module

Technical Field

The embodiment of the application relates to but is not limited to the technical field of display, in particular to a reflector plate and a backlight module.

Background

Currently, a backlight module of a liquid crystal display device generally employs a Light-Emitting Diode (LED) as a Light source. The backlight module can be divided into a direct type backlight module and a side type backlight module according to the distribution position of the light source, wherein the direct type backlight module is focused by researchers in the industry due to the advantages of light weight, low power consumption and high brightness.

Because the reflective lens has a larger light-emitting angle, the direct-type backlight module with low light mixing height usually employs the reflective lens. However, the large light emitting angle of the reflective lens may cause a bright edge, which is an over-bright area, at the edge of the visible area, and the bright edge phenomenon may further affect the image display quality of the liquid crystal display device.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a reflector plate and a backlight module, which can improve the display quality.

The embodiment of the application provides a reflector plate, which comprises a body part, and a first side plate, a second side plate, a third side plate and a fourth side plate which are arranged on the periphery of the body part, wherein the first side plate and the second side plate are arranged oppositely, the third side plate and the fourth side plate are arranged oppositely, and the body part is provided with a plurality of lamp holes; at least one lamp hole located at the edge position of the body part is provided with a light blocking part, at least one side surface of the light blocking part is provided with a light absorbing material, and the lamp hole located at the edge position of the body part comprises one or more of the following components: a first edge light hole, a second edge light hole, a third edge light hole and a fourth edge light hole; the ith edge lamp hole is a lamp hole adjacent to the ith side plate, the light blocking part of the ith edge lamp hole is positioned at the edge of one side, close to the ith side plate, of the ith edge lamp hole, and i is a natural number between 1 and 4.

In an exemplary embodiment, the light blocking parts are of a foldable structure, each light blocking part comprises a folded edge connected with the reflector plate, and after each light blocking part is folded along the folded edge, a light absorbing material is arranged on the side surface close to the edge lamp hole.

In one exemplary embodiment, the reflective sheet includes first and second surfaces disposed opposite to each other, the first surface being provided with a light absorbing material.

In an exemplary embodiment, the lamp holes include a first lamp hole adjacent to only one of the first, second, third and fourth side plates and a second lamp hole adjacent to two of the first, second, third and fourth side plates or not adjacent to either side plate; the first lamp hole is provided with the light blocking part; the second lamp hole is not provided with the light blocking portion.

In an exemplary embodiment, the light blocking part has a rectangular, square, semicircular, trapezoidal, or arc shape.

In an exemplary embodiment, the light blocking portion includes a light absorbing portion and a hollow portion, the light absorbing portion and the hollow portion constitute a first trapezoid, the hollow portion is a second trapezoid, lower bases of the first trapezoid and the second trapezoid coincide with each other and are connected with the body portion, upper bases of the first trapezoid and the second trapezoid are parallel to each other and a length of the upper base of the second trapezoid is smaller than a length of the upper base of the first trapezoid, and two oblique sides of the first trapezoid and the second trapezoid are parallel to each other respectively.

In an exemplary embodiment, the two oblique sides of the first trapezoid form an angle with the base of 40 to 50 degrees, and the two oblique sides of the second trapezoid form an angle with the base of 40 to 50 degrees.

The embodiment of the application further provides a backlight module, which comprises the reflector plate, a back plate, a light source, a lens and a diffusion plate, wherein the light source is arranged on the back plate, the lens is fixed on the light source, the reflector plate is positioned between the diffusion plate and the back plate, the light blocking part is lapped on the side surface of the lens, and the lamp hole is used for allowing the light source and the lens to pass through.

In an exemplary embodiment, the light blocking part includes a light absorbing part and a hollow part, the light absorbing part and the hollow part form a first trapezoid, the hollow part is a second trapezoid, lower base edges of the first trapezoid and the second trapezoid coincide with each other, two oblique sides of the first trapezoid and the second trapezoid are respectively parallel to each other, a height of the first trapezoid is h1, a height of the second trapezoid is h2, a height of the lens is h, h1 is between 2/3 h and 1/2 h, h2 is between 1/3 h1 and 2/3 h1, and the light blocking part and the hollow part are in a form of a multiplier.

In an exemplary embodiment, the lamp hole is in the shape of a square with a side length a, the orthographic projection of the lens on the back plate is in the shape of a square with a side length b, and the difference between a and b is 1-2 mm.

According to the reflector plate and the backlight module provided by the embodiment of the application, the light blocking part is arranged through the lamp hole at the edge position of the body part, and the emergent light of partial lens is absorbed through the light absorbing material on the light blocking part, so that the light beam at the edge of the screen is reduced, the bright edge generated at the edge of the visible area is eliminated, the image display quality is improved, and the number of printing meshes is small; the manufacturing cost of the printing screen is low; the consumption of light absorption materials is low; the picture optimization effect is better than that of the traditional printing.

Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.

Drawings

The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.

Fig. 1 is a schematic structural view of a reflector in the related art;

fig. 2 is a schematic structural diagram of a reflective sheet according to an embodiment of the present disclosure;

fig. 3 is a schematic view of a first surface structure of a reflective sheet before a light blocking portion is folded according to an embodiment of the present application;

fig. 4 is a schematic view of a second surface structure of a reflective sheet before a light blocking portion is folded according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another reflector according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a light blocking portion according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a backlight module according to an embodiment of the present application;

FIG. 8 is a schematic diagram illustrating a relationship between light blocking portions and lenses according to an embodiment of the present disclosure;

FIG. 9 is a second schematic view illustrating a positional relationship between a light blocking portion and a lens according to an embodiment of the present application;

FIGS. 10(a) to 10(c) are schematic diagrams illustrating a comparison between the sizes of a lens and a light blocking part according to an embodiment of the present application;

FIG. 11 is a schematic diagram illustrating a distribution of light exiting positions of a lens according to an embodiment of the present disclosure;

fig. 12 is a schematic structural diagram of a backlight module in optical simulation software according to an embodiment of the present application;

fig. 13 is a diagram illustrating a simulation result of light distribution of the backlight module shown in fig. 12.

Detailed Description

The following describes embodiments with reference to the drawings. Note that the embodiments may be implemented in a plurality of different forms. Those skilled in the art can easily understand the fact that the modes and contents can be changed into various forms without departing from the spirit and scope of the present invention. Therefore, the present invention should not be construed as being limited to the description of the following embodiments.

In the drawings, the size of each component, the thickness of layers, or regions may be exaggerated for clarity. Therefore, one embodiment of the present invention is not necessarily limited to the above dimensions, and the shapes and sizes of the respective members in the drawings do not reflect the true scale. In addition, the drawings schematically show ideal examples, and one embodiment of the present invention is not limited to the shapes, numerical values, and the like shown in the drawings.

The ordinal numbers such as "first", "second", "third", and the like in the present specification are provided for avoiding confusion among the constituent elements, and are not limited in number.

In this specification, for convenience, words such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating orientations or positional relationships are used to describe positional relationships of constituent elements with reference to the drawings, only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The positional relationship of the components is changed as appropriate in accordance with the direction in which each component is described. Therefore, the words described in the specification are not limited to the words described in the specification, and may be replaced as appropriate.

The direct type backlight module generally comprises a back plate, a light bar, a reflector plate, a diffuser plate, a diaphragm and other structures; the backlight module has a certain cavity height, light can be mixed in the cavity after being emitted from the lens, and the height of the light mixing cavity determines the specification of the lens. The Light mixing Distance (OD) is a vertical Distance between the upper surface of the bottom of the reflector plate and the lower surface of the diffuser plate, and since the Light mixing cavity with a short Light mixing Distance is smaller, a reflective backlight structure is generally used in the backlight module of a small Light mixing cavity, and the reflective backlight structure is manufactured by attaching Light Emitting Diode (LED) lamp beads to a printed circuit board and covering the LED lamp beads with a reflective lens. Most of light emitted by the reflective backlight structure is emitted to the side surface of the LED lamp bead through the reflective lens, and because the light emitted from the side surface of the LED lamp bead is reflected more at the folded edge part of the reflector plate, a bright edge is caused at the edge part of a picture.

As shown in fig. 1, some technologies solve the problem of the bright edge at the periphery by adding black silk screen around the reflector, but this method has the following problems: (1) black silk screen printing is added around the reflector plate, and the size and the density of the silk screen printing are controlled according to different distances from the edge; (2) the number of the printing screen holes is more, generally between hundreds and thousands; (3) the manufacturing cost of the printing screen is high; (4) the consumption of ink is large; (5) poor printing (missing printing, offset and the like) is high under the condition that a plurality of printing dots are printed; (6) the design difficulty of the printing screen is higher, because the number, the size and the position of the designed dots are factors influencing the final effect, and the plate changing period is longer; (7) the inspection difficulty is large.

As shown in fig. 2, an embodiment of the present application provides a reflective sheet, which includes a body portion 20, and a first side plate 21, a second side plate 22, a third side plate 23, and a fourth side plate 24 disposed around the body portion 20, where the first side plate 21 and the second side plate 22 are disposed oppositely, the third side plate 23 and the fourth side plate 24 are disposed oppositely, and the body portion 20 is provided with a plurality of lamp holes 10.

At least one lamp hole 10 located at an edge position of the body part 20 is provided with a light blocking part 11, at least one side of the light blocking part 11 is provided with a light absorbing material, and the lamp hole 10 located at the edge position of the body part 20 includes one or more of the following: a first edge light hole 101, a second edge light hole 102, a third edge light hole 103, and a fourth edge light hole 104.

The first edge light hole 101 is a light hole adjacent to the first side plate 21, and the light blocking portion 11 of the first edge light hole 101 is located at an edge of the first edge light hole 101 on a side close to the first side plate 21.

The second edge light hole 102 is a light hole adjacent to the second side plate 22, and the light blocking part 11 of the second edge light hole 102 is located at an edge of the second edge light hole 102 on a side close to the second side plate 22.

The third edge light hole 103 is a light hole adjacent to the third side plate 23, and the light blocking portion 11 of the third edge light hole 103 is located at an edge of the third edge light hole 103 close to one side of the third side plate 23.

The fourth edge light hole 104 is a light hole adjacent to the fourth side plate 24, and the light blocking portion 11 of the fourth edge light hole 104 is located at an edge of the fourth edge light hole 104 close to the fourth side plate 24.

In the reflector sheet of the embodiment of the application, the light blocking part 11 is arranged in the lamp hole 10 at the edge position of the body part 20, and the emergent light of partial lens is absorbed by the light absorbing material arranged on one side surface of the light blocking part 11, so that the light beam at the edge of the screen is reduced, the effect of removing the bright edge around the screen can be achieved, and the number of printing meshes is small; the manufacturing cost of the printing screen is low; the consumption of light absorption materials is low; the picture optimization effect is better than that of the traditional printing.

As shown in fig. 2, the light blocking portion 11 is provided on the lamp hole at a position around the peripheral edge of the body portion 20. The light blocking part of the upper lamp hole is arranged at the upper part of the upper lamp hole; the light blocking part of the lower lamp hole is arranged at the lower part of the lower lamp hole; the light blocking part of the left lamp hole is arranged at the left part of the left lamp hole; the light blocking part of the right lamp hole is arranged at the right part of the right lamp hole.

In an exemplary embodiment, as shown in fig. 3 to 4, the light blocking portions 11 are foldable structures, each light blocking portion 11 includes a folded edge 110 connected to the reflector, and after each light blocking portion 11 is folded along the folded edge 110, a light absorbing material is disposed near a side of the lamp hole to which the light blocking portion 11 belongs.

In the embodiment, the light blocking part 11 is designed to be of a foldable structure, so that redundant work cannot be added to the added light blocking part 11 in the assembling process of the reflector; the design flexibility is larger, the printing shape can be flexibly adjusted by adjusting the shape and the size of the light blocking part 11, a black oil pen can be used for simulation test in the design process, and the design verification period is greatly reduced; because the printing is simple, the printing quantity is reduced, and the inspection difficulty is greatly reduced.

In an exemplary embodiment, the length of the flap 110 may be about 1 to 6 mm, and the length of the flap 110 may be about 5 mm, for example.

In one exemplary embodiment, as shown in fig. 3 to 4, the reflective sheet includes first and second surfaces disposed opposite to each other, the first surface being provided with a light absorbing material.

When the reflector plate is installed in the backlight module, the first surface is the surface close to one side of the back plate (namely, the back surface of the reflector plate, after the light blocking part 11 is turned over, the side surface close to the lamp hole 10 to which the light blocking part 11 belongs is the first surface), the second surface is the surface close to the light emitting side (namely, the front surface of the reflector plate), and through completely arranging the light absorption ink on the back surface of the reflector plate, if the contamination caused by printing has no influence on the front surface of the reflector plate, the yield is greatly improved.

In one exemplary embodiment, the first edge light hole 101 and the second edge light hole 102 are provided with the light blocking part 11.

In an exemplary embodiment, the third edge light hole 103 and the fourth edge light hole 104 are provided with the light blocking part 11.

In an exemplary embodiment, as shown in fig. 5, the lamp holes include a first lamp hole 10a and a second lamp hole 10b, the first lamp hole 10a is adjacent to only one of the first side plate 21, the second side plate 22, the third side plate 23, and the fourth side plate 24, and the second lamp hole 10b is a lamp hole other than the first lamp hole 10a (the second lamp hole 10b is adjacent to edges of two of the first side plate 21, the second side plate 22, the third side plate 23, and the fourth side plate 24 or is not adjacent to any one of them).

The first lamp hole 10a is provided with the light blocking portion 11, and the second lamp hole 10b is not provided with the light blocking portion 11.

As can be seen from fig. 5, since there is only one LED bead at the four corners of the main body 20, the light itself is weak, so there is no problem of bright edge and there is no need to reduce the brightness. Correspondingly, the light blocking portions are not disposed in the lamp holes at the four corners of the main body portion 20 of the reflector sheet.

In an exemplary embodiment, the shape of the light blocking part 11 may be a rectangle, a square, a semicircle, a trapezoid, or an arc.

In an exemplary embodiment, as shown in fig. 6, the light blocking portion 11 includes a light absorbing portion 11a and a hollow portion 11b located in the light absorbing portion 11a, the light absorbing portion 11a and the hollow portion 11b form a first trapezoid, the hollow portion 11b is a second trapezoid, lower bases of the first trapezoid and the second trapezoid coincide with each other and are connected to the body portion 20, upper bases of the first trapezoid and the second trapezoid are parallel to each other and a length of an upper base of the second trapezoid is smaller than a length of an upper base of the first trapezoid, and two oblique sides of the first trapezoid and the second trapezoid are respectively parallel to each other.

The shape, size, and the like of the light blocking portion 11 in the embodiment of the present application may be set according to the light emitted from the actual lens, which is not limited in the present application.

As shown in fig. 7 to 9, an embodiment of the present application further provides a backlight module, which includes the reflective sheet as described in any one of the above, and further includes a back plate (not shown), a light source (not shown), lenses 30 (only one is schematically shown in the drawings), and a diffusion plate 50, wherein the light source is disposed on the back plate, the lenses 30 are fixed on the light source, the reflective sheet is located between the diffusion plate 50 and the back plate, the light blocking portion 11 is overlapped on the side surface of the lenses 30, and the lamp holes 10 are used for the light source and the lenses 30 to pass through.

In an exemplary embodiment, the lens 30 is a reflective lens, as shown in fig. 8 to 9, the bottom of the lens 30 is a rectangular parallelepiped with a square bottom surface, the upper part of the lens is an inverted frustum-shaped mirror body, the upper surface of the mirror body is provided with a groove, and the side surface of the mirror body is a reflective surface.

The lens used by the direct type backlight module mainly comprises a transmission type structure and a reflection type structure, and compared with the transmission type lens, the reflection type lens has higher optical efficiency and shorter light mixing distance, so that the reflection type lens has wider application in the backlight module with a small light mixing cavity.

As shown in fig. 10(a) to 10(c), the outline of the orthographic projection of the lens 30 on the rear plate is a square with a side length of b, and the height of the lens is h. The shape of the lamp hole is a square with the side length of a, the lens is placed in the lamp hole in the middle, 2 mm > (a-b) > (1 mm), and the value of (a-b) is too small, so that the lamp hole and the lens are easy to interfere; the value of (a-b) is too large and easily deviated, and generally 1 to 2 millimeters (mm) is a size that is compatible with both workability and assembly accuracy.

In an exemplary embodiment, as shown in fig. 10(a), the light blocking part 11 includes a light absorbing part 11a and a hollow part 11b located inside the light absorbing part 11a, the light absorbing part 11a and the hollow part 11b constitute a first trapezoid, the hollow part 11b is a second trapezoid, lower bases of the first trapezoid and the second trapezoid coincide with each other and are connected to the body part 20, upper bases of the first trapezoid and the second trapezoid are parallel to each other and a length of the upper base of the second trapezoid is smaller than a length of the upper base of the first trapezoid, two oblique sides of the first trapezoid and the second trapezoid are respectively parallel to each other, a height of the first trapezoid is h1, a height of the second trapezoid is h2, h1 is between 2/3 h and 1/2 h, h2 is between 1/3 h1 and 2/3 h1, and h is a height of a lens, which is a multiple sign.

In an exemplary embodiment, as shown in fig. 10(a), the angle between the two oblique sides of the first trapezoid and the bottom side is between 40 degrees and 50 degrees, and the angle between the two oblique sides of the second trapezoid and the bottom side is between 40 degrees and 50 degrees.

The specific shape of the light blocking part can be a hollowed first trapezoid, and the length of the bottom of the first trapezoid is the same as the side length of the lamp hole and is a. The height of the first trapezoid is h1, which can be determined according to the light emitting angle of the lens as follows: 2h/3> h1> h/2, the second trapezoid is hollow and has a height h2, h2 is between 1/3 × h1 and 2/3 × h1, and in an exemplary embodiment, h2 may be sized to be h 1/2. The angle between the two oblique sides of the first trapezoid and the base is between 40 degrees and 50 degrees, the angle between the two oblique sides of the second trapezoid and the base is between 40 degrees and 50 degrees, and in an exemplary embodiment, the angle between the oblique sides of the first trapezoid and the second trapezoid may be 45 °.

The middle part of the first trapezoid and the second trapezoid is a reflector plate entity, light absorbing materials (for example, the light absorbing materials can be light absorbing ink) are printed on the surface of one side of the lens after being folded, and light rays emitted by the LED lamp beads, which are reflected and refracted by the lens, are projected to the four sides of the backlight module to emit light.

As shown in fig. 11, the light source (LED lamp bead) is disposed in the lens 30, the light blocking portion 11 is overlapped on the side surface of the lens 30, the LED lamp bead and the lens 30 pass through the lamp hole 10, and since few light rays of the LED lamp bead are emitted vertically and upwardly, not shown, more than 90% of light rays are emitted from the side surface of the lens in the peripheral horizontal direction, the light rays emitted from the side surface can be divided into three parts, the light rays in the "1" region are incident on the "5" region, the light rays in the "2" region are incident on the "5" region, and the light rays in the "3" region are incident on the "4. It can be seen that the light rays in the "1" and "2" regions have different emission angles, but when viewed finally, the light rays overlap the "5" region, so that the "5" region is brighter than the "4" region, and the "5" region is a bright edge.

If the folded edge is not provided with the hollowed-out trapezoid, the light in the area 4 is also absorbed, and the light in the area 5 from the area 2 is absorbed, so that the area 5 is still brighter than the area 4, and bright-dark contrast is realized.

When the folded edge is in a hollow trapezoid shape, light rays in the '1' area enter the '5' area, and light rays in the '3' area enter the '4' area, so that the brightness balance between the '4' area and the '5' area is achieved. The brightness of the "5" area is reduced and the problem of bright edges is solved without affecting the brightness of the "4" area.

In one exemplary embodiment, the light absorbing material is a light absorbing ink or any other type of light absorbing material.

In one exemplary embodiment, the light absorbing ink may be black, gray, or colored.

When the light emitted by the backlight module is white light backlight, the light absorption ink can be black or gray; when the light emitted from the backlight module is non-white backlight such as blue backlight or red backlight, the light-absorbing ink can be colored.

As shown in fig. 12, in an optical simulation software, the structure of the backlight module according to the embodiment of the present application, including the reflector, the LED beads 40, the lens 30 and the diffuser 50, is configured to perform optical brightness simulation. The LED lamp bead 40 emits 100000 light beams, which pass through the lens 30 and the light blocking portion 11, and the light beams are distributed in the whole cavity structure, as can be seen from the simulation result of fig. 13, since the light absorbing ink of the light blocking portion 11 absorbs a large amount of light beams, the light density at the B position is significantly smaller than that at the a position, and the light beams at the B position are distributed more uniformly, so that the problem of bright edges is solved.

The embodiment of the present application further provides a display device, which includes a backlight module and a display panel, wherein the backlight module may be the backlight module described in the foregoing embodiment, and the display device may be a non-self-luminous display device such as a liquid crystal display or a liquid crystal television, and the backlight module provided in the embodiment of the present application is used to provide backlight for the display device.

The reflector plate and the backlight module of the embodiment of the application have the advantages that the light blocking parts are arranged through the plurality of lamp holes close to the edge position of the body part, light absorbing ink is printed on the back face of the light blocking parts, the light blocking parts can be lapped on the side edges of the lenses after being turned over, a barrier can be shielded, and part of the side edges of the lenses can be absorbed to transmit light to the edge of a picture, so that the picture becomes more uniform and the uniformity of the picture is improved.

In the description of the embodiments of the present application, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present application.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.

Claims

1. A reflector plate is characterized by comprising a body part, a first side plate, a second side plate, a third side plate and a fourth side plate, wherein the first side plate, the second side plate, the third side plate and the fourth side plate are arranged on the periphery of the body part, the first side plate and the second side plate are arranged oppositely, the third side plate and the fourth side plate are arranged oppositely, and the body part is provided with a plurality of lamp holes;

at least one lamp hole located at the edge position of the body part is provided with a light blocking part, at least one side surface of the light blocking part is provided with a light absorbing material, and the lamp hole located at the edge position of the body part comprises one or more of the following components: a first edge light hole, a second edge light hole, a third edge light hole and a fourth edge light hole;

the ith edge lamp hole is a lamp hole adjacent to the ith side plate, the light blocking part of the ith edge lamp hole is positioned at the edge of one side, close to the ith side plate, of the ith edge lamp hole, and i is a natural number between 1 and 4.

2. The reflector plate as claimed in claim 1, wherein the light-blocking parts are foldable structures, each light-blocking part comprises a folded edge connected to the reflector plate, and after each light-blocking part is folded along the folded edge, a light-absorbing material is disposed on a side surface close to the lamp hole to which the light-blocking part belongs.

3. The reflector sheet of claim 2, wherein the reflector sheet comprises first and second oppositely disposed surfaces, the first surface being provided with a light absorbing material.

4. The reflector sheet of claim 1, wherein the lamp holes comprise a first lamp hole and a second lamp hole, the first lamp hole being adjacent to only one of the first, second, third, and fourth side plates, the second lamp hole being adjacent to two of the first, second, third, and fourth side plates or not adjacent to either side plate;

the first lamp hole is provided with the light blocking part; the second lamp hole is not provided with the light blocking portion.

5. The reflection sheet according to claim 1, wherein the light blocking portion has a rectangular, square, semicircular, trapezoidal, or arc shape.

6. The reflector plate as claimed in claim 1, wherein the light blocking portion includes a light absorbing portion and a hollow portion located in the light absorbing portion, the light absorbing portion and the hollow portion form a first trapezoid, the hollow portion is a second trapezoid, lower bases of the first trapezoid and the second trapezoid coincide with each other and are connected to the body portion, upper bases of the first trapezoid and the second trapezoid are parallel to each other, a length of an upper base of the second trapezoid is smaller than a length of an upper base of the first trapezoid, and two oblique sides of the first trapezoid and the second trapezoid are respectively parallel to each other.

7. The reflector sheet of claim 6, wherein the angle between the two oblique sides of the first trapezoid and the bottom side is between 40 degrees and 50 degrees, and the angle between the two oblique sides of the second trapezoid and the bottom side is between 40 degrees and 50 degrees.

8. A backlight module comprising the reflective sheet as claimed in any one of claims 1 to 7, further comprising a back plate, a light source, a lens and a diffusion plate, wherein the light source is disposed on the back plate, the lens is fixed on the light source, the reflective sheet is disposed between the diffusion plate and the back plate, the light blocking portion overlaps the side surface of the lens, and the lamp hole is used for passing through the light source and the lens.

9. A backlight module according to claim 8, wherein when the reflector sheet is the reflector sheet of claim 6, the first trapezoid has a height h1, the second trapezoid has a height h2, the lenses have a height h1 of 2/3 × h to 1/2 × h, and h2 of 1/3 × h1 to 2/3 × h1, where × is a multiplier.

10. The backlight module as claimed in claim 9, wherein the lamp hole has a square shape with a side length of a, the orthographic projection of the lens on the back plate has a square shape with a side length of b, and the difference between a and b is 1 mm to 2 mm.