Backlight module and display device

Abstract

The utility model provides a backlight module and a display device, the backlight module comprises a lamp panel, the lamp panel comprises a gradual change area, and the gradual change area is arranged at the position, close to the edge of the lamp panel, of the lamp panel in the circumferential direction of the lamp panel; the multiple first lamp beads located in the gradual change area are arranged in a gradual change mode, and the closer the first lamp beads are to the edge of the lamp panel, the larger the distance between the adjacent first lamp beads is. The gradual change area is arranged at the position, close to the edge of the lamp panel, of the lamp panel in the circumferential direction of the lamp panel, the first lamp beads in the gradual change area are arranged in the gradual change mode, and the distance between the first lamp bead closer to the edge of the lamp panel and the upper adjacent first lamp bead is larger; the first lamp beads are arranged in the gradually changing area, so that the closer to the edge of the lamp panel, the larger the distance between the adjacent lamp beads is, and the smaller the blue light intensity is, and therefore in the gradually changing area, after the first lamp beads are matched with a QD film, the phenomenon that the backlight module turns bluing cannot occur.

Description

Technical Field

[0001] The utility model relates to the field of Mini LED display technology, and in particular to a backlight module and a display device. Background Art

[0002] With the rapid development of Mini LED display technology, it is increasingly used in display devices due to its high dynamic contrast, energy saving, high color gamut, ultra-thin and other functional advantages. Mini LED display technology uses a partition-controlled Mini LED backlight module to achieve display functions. At this stage, Mini LED display technology mainly produces white light by using blue LED lamp beads with QD films. Although this method can bring good wide color gamut performance, high contrast, high dynamic range and local dimming functions, it will cause the edges of the backlight module to appear blue to varying degrees, thus affecting the effect of the backlight module.

[0003] In order to improve the problem of varying degrees of bluing on the edges of the backlight module, the current method of adding yellow silk screen printing around the backlight module is to improve it. However, this method will be affected by the assembly and the size of the silk screen aperture. It is difficult to control the consistency of the backlight module during mass production of the backlight module, and the edges of the backlight module will still appear bluish or even yellowish. Utility Model Content

[0004] The embodiments of the utility model provide a backlight module and a display device, which effectively solve the problem of blue color appearing on the edges around the backlight module and improve the quality of the display device.

[0005] The utility model provides a backlight module, which includes:

[0006] The light board comprises a gradient region, wherein the gradient region is arranged at an edge of the light board close to the light board along the circumference of the light board;

[0007] The plurality of first lamp beads located in the gradient area are arranged in a gradient manner, and the closer to the edge of the light board, the larger the distance between adjacent first lamp beads.

[0008] In the backlight module provided by the present invention, the gradient area includes a plurality of partitions, and the total number of rows or columns of the first lamp beads in the gradient area is an integer multiple of n rows or n columns of each partition, wherein n is a natural number.

[0009] In the backlight module provided by the utility model, the lamp board also includes a uniform area, which is arranged in the middle of the lamp board along the circumference of the lamp board and adjacent to the gradient area; wherein the plurality of second lamp beads located in the uniform area are evenly arranged.

[0010] In the backlight module provided by the present invention, the second lamp beads include first edge lamp beads, the first edge lamp beads are located at the edge of the uniform area, the spacing between the first edge lamp beads and the adjacent second lamp beads is a first spacing; the spacing between the first edge lamp beads and the adjacent first lamp beads is a second spacing, the second spacing and the first spacing are in the same row or column, and the second spacing is greater than the first spacing.

[0011] In the backlight module provided by the present invention, the first lamp bead includes a second edge lamp bead, and the second edge lamp bead is adjacent to the first edge lamp bead; the spacing between the second edge lamp bead and the adjacent first lamp bead is a third spacing, and the third spacing and the second spacing are in the same row or column, and the third spacing is greater than the second spacing.

[0012] In the backlight module provided by the present invention, the difference between the second spacing arranged horizontally and the first spacing is consistent with the difference between the second spacing arranged vertically and the first spacing.

[0013] In the backlight module provided by the present invention, the first lamp beads and the second lamp beads are in an aligned row and column structure.

[0014] In the backlight module provided by the present invention, the spacing between adjacent second lamp beads arranged in a transverse direction is different from the spacing between adjacent second lamp beads arranged in a longitudinal direction.

[0015] In the backlight module provided by the utility model, the gradient area further includes an opening, and the opening is used for wiring.

[0016] The utility model also provides a display device, which includes:

[0017] A backlight module, wherein the backlight module is any one of the backlight modules described above.

[0018] The utility model provides a backlight module and a display device, the backlight module includes a lamp board, the lamp board includes a gradient area, the gradient area is arranged along the circumference of the lamp board near the edge of the lamp board; wherein, a plurality of first lamp beads located in the gradient area are arranged in a gradient manner, and the closer to the edge of the lamp board, the larger the distance between adjacent first lamp beads. The present application arranges a gradient area along the circumference of the lamp board near the edge of the lamp board, so that the lamp board is designed with gradients all around, the first lamp beads are arranged in a gradient manner, the closer to the edge of the lamp board, the larger the distance between the first lamp beads and the adjacent previous first lamp beads, so that the blue light intensity of the edges of the lamp board and the distance between the first lamp beads and the edge of the lamp board are in a functional relationship, that is, the closer to the edge of the lamp board, the larger the distance between adjacent lamp beads, and the smaller the blue light intensity, so that in the gradient area, after the first lamp beads are matched with the QD film, the backlight module will not appear blue. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a structural diagram of the light board in the embodiment of the utility model;

[0021] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0022] The reference numerals in the figures are:

[0023] 100, lamp board; 110, gradient area; 111, first lamp bead; 1111, second edge lamp bead; 120, uniform area; 121, second lamp bead; 1211, first edge lamp bead. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0025] Reference Figure 1 and Figure 2As shown, it shows an embodiment of the backlight module and display device of the utility model. The backlight module includes a lamp board 100, and the lamp board 100 includes a gradient area 110, and the gradient area 110 is arranged at the edge of the lamp board 100 close to the lamp board 100 along the circumference of the lamp board 100; wherein, a plurality of first lamp beads 111 located in the gradient area 110 are arranged in a gradient manner, and the closer to the edge of the lamp board 100, the larger the distance between adjacent first lamp beads 111.

[0026] Specifically, the backlight module is one of the key components of the display device, and its function is to supply sufficient brightness and uniformly distributed light source so that the display device can display images normally. The backlight module includes a lamp board 100, which is a PCB board. The lamp board 100 has lamp beads, thereby generating a light source to enable the display device to form an image; at this stage, in Mini LED display technology, white light is generated by using blue LED lamp beads in combination with QD films. In this embodiment, the lamp board 100 includes a gradient area 110, which is arranged along the circumference of the lamp board 100, and the gradient area 110 is arranged at the edge of the lamp board 100, and a plurality of first lamp beads 111 are arranged on the gradient area 110, and the first lamp beads 111 are arranged in a gradient manner, and the closer to the edge of the lamp board 100, the larger the spacing between adjacent first lamp beads 111.

[0027] For example, Figure 2 As shown, the following is a gradual arrangement method of the first lamp beads 111 of the lamp board 100 (unit: mm):

[0028] PX4-PX3=0.8; PX3-PX2=0.5; PX2-PX1=0.3; PX1-PX=0.2; (1-1)

[0029] PY4-PY3=0.8; PY3-PY2=0.3; PY2-PY1=0.2; PY1-PY=0.2; (1-2)

[0030] From this arrangement, it can be seen that PX, PX1, PX2, PX3, PX4; or PY, PY1, PY2, PY3, PY4 are nonlinear univariate polynomial function relationships (wherein, PX1, PX2, PX3, PX4 are the lateral spacing between the first lamp beads 111; PY1, PY2, PY3, PY4 are the longitudinal spacing between the first lamp beads 111; PX is the lateral spacing of the second lamp beads 121 uniformly arranged in the uniform area 120; PY is the longitudinal spacing of the second lamp beads 121 uniformly arranged in the uniform area 120.); this polynomial can be simply expressed as: Y = aX 3+bX 2 +cX+d (1-3) (Y is the distance between the Xth first lamp bead 111 and the adjacent first lamp bead 111; X is the nth first lamp bead 111 from the inside to the outside; a, b, c, d are parameters).

[0031] It can be seen that a gradient area 110 is set along the circumference of the lamp board 100 near the edge of the lamp board 100, so that the lamp board 100 is designed with gradient on all sides, and the first lamp beads 111 are arranged in a gradient manner, that is, the closer the first lamp bead 111 is to the edge of the lamp board 100, the larger the distance between the first lamp bead 111 and the adjacent previous first lamp bead 111 is. This design makes the blue light intensity around the edge of the lamp board 100 and the distance between the first lamp bead 111 and the edge of the lamp board 100 have a functional relationship, that is, the closer to the edge of the light board 100, the larger the distance between adjacent lamp beads, and the smaller the blue light intensity, so that in the gradient area 110 of the light board 100, after the first lamp bead 111 is matched with the QD film, the backlight module will not appear bluish around.

[0032] At the same time, the gradient arrangement will not be difficult in terms of technology. It is only necessary to confirm the arrangement of the first lamp beads 111 during the early design, and then send it to the PCB manufacturer for proofing after layout. The process is relatively simple and the cost will not increase. Compared with the solution of adding 4 PCS yellow silk screen around the back panel cavity or adjusting the QD film, the cost undoubtedly has a clear advantage.

[0033] In particular, in some cases where the OD value is relatively small, in the gradient area 110, the spacing between some of the first lamp beads 111 and adjacent first lamp beads 111 (i.e., the PITCH value) needs to be adjusted to be larger. Specifically, it is necessary to conduct more proofreading in the early design to concentrate on the arrangement of the first lamp beads 111 on the lamp board 100 for verification, and confirm the PITCH value of the gradient arrangement part by the method of stepwise approximation; when the outer dimensions of the lamp board 100 are limited, and the lateral spacing or longitudinal spacing between the first lamp beads 111 and adjacent first lamp beads 111 cannot be increased, the taste of the backlight module can be optimized by adjusting the uniformity of the QD film around it.

[0034] In one embodiment, the gradient region 110 includes a plurality of partitions (not shown in the figure), and the total number of rows or columns of the first lamp beads 111 in the gradient region 110 is an integer multiple of n rows or n columns of each partition, where n is a natural number. Specifically, the circuit in the Mini LED display technology is designed by partitioning, and the same gradient region 110 or uniform region 120 is partitioned separately, that is, there is only one arrangement of lamp beads in the partition, and all lamp beads in the partition can be the first lamp beads 111 arranged in a gradient manner or the second lamp beads 121 arranged uniformly, so as to facilitate the distinction of the area to which the partition belongs, that is, to facilitate the judgment that the partition is a gradient region 110 or a uniform region 120. In this embodiment, the gradient area 110 includes a plurality of partitions, each of which is provided with a plurality of the first lamp beads 111 arranged in a gradient manner, wherein the number of rows or columns of all the first lamp beads 111 in the gradient area 110 is an integer multiple of n rows or n columns of each partition. For example, the gradient area 110 of one lamp board 100 is composed of 512 partitions, and one partition is arranged in A rows and B columns, and all the first lamp beads 111 in the gradient area 110 can be designed as An rows and Bn columns (n ​​is a natural number such as 1, 2, 3, 4, 5, 6, 7...), and n can be specifically adjusted according to the OD value.

[0035] By adopting the partitioned arrangement method, after the first lamp bead 111 is matched with the QD film and other gain films, the backlight module will not have obvious bluing phenomenon around it, so there is no need to add reflective silk screen or other methods around the back panel cavity of the backlight module to solve the bluing problem around the backlight module; and a larger routing space is provided for the routing on the lamp board 100; at the same time, the gradient area 110 is partitioned, and the total number of rows or columns of the first lamp beads 111 in the gradient area 110 is an integer multiple of n rows or n columns in each partition, which can make it simpler and faster to arrange the first lamp beads 111.

[0036] In a specific embodiment, refer to Figure 1 and Figure 2As shown, the lamp board 100 further includes a uniform region 120, which is arranged in the middle of the lamp board 100 along the circumference of the lamp board 100 and adjacent to the gradient region 110; wherein the plurality of second lamp beads 121 located in the uniform region 120 are arranged uniformly. Specifically, the light board 100 also includes a uniform area 120, and the uniform area 120 is located in the middle of the light board 100. The middle of the light board 100 refers to a partial area extending outward from the center of the light board 100. The middle of the light board 100 is connected to the gradient area 110. The uniform area 120 is arranged along the circumference of the light board 100 and is adjacent to the gradient area 110. The gradient area 110 is arranged between the uniform area 120 and the edge of the light board 100 along the circumference of the uniform area 120, that is, the light board 100 is a "U"-shaped structure, and the outer ring area of ​​the light board 100 is the gradient area 110. The inner circle area of ​​the lamp board 100 is the uniform area 120, and the multiple second lamp beads 121 located in the uniform area 120 are evenly arranged, that is, the lateral distance and / or longitudinal distance between each second lamp bead 121 and the adjacent second lamp bead 121 are consistent. Since the middle part of the lamp board 100 has little effect on the bluing phenomenon around the backlight module, the middle part of the lamp board 100 is set as the uniform area 120, so that the second lamp beads 121 in the uniform area 120 are set to be evenly arranged, which reduces the step of calculating the arrangement position of each second lamp bead 121, so as to improve the process efficiency and reduce the production cost.

[0037] In one embodiment, referring to Figure 1 and Figure 2 As shown, the second lamp bead 121 includes a first edge lamp bead 1211, the first edge lamp bead 1211 is located at the edge of the uniform area 120, and the spacing between the first edge lamp bead 1211 and the adjacent second lamp bead 121 is a first spacing; the spacing between the first edge lamp bead 1211 and the adjacent first lamp bead 111 is a second spacing, the second spacing and the first spacing are in the same row or column, and the second spacing is greater than the first spacing. Specifically, the edge of the uniform area 120 refers to the edge of the uniform area 120 adjacent to the gradient area 110, the second lamp bead 121 includes the first edge lamp bead 1211, the first edge lamp bead 1211 is the lamp bead closest to the edge of the uniform area 120 among the second lamp bead 121, that is, the second lamp bead 121 and the first lamp bead 111 are on both sides of the first edge lamp bead 1211 respectively; the spacing between the first edge lamp bead 1211 and the adjacent second lamp bead 121 is a first spacing (such as Figure 2The distance between the first edge lamp bead 1211 and the adjacent first lamp bead 111 is a second distance (such as Figure 2 PX1 or PY1 in the figure), wherein the first spacing and the second spacing refer to the horizontal spacing or the vertical spacing in the same direction, that is, the first spacing and the second spacing are in the same row or the same column, and the second spacing is closer to the edge of the light board 100 than the first spacing. Therefore, the second spacing is set to be greater than the first spacing, so as to further reduce the bluing phenomenon around the backlight module.

[0038] In a specific embodiment, refer to Figure 1 and Figure 2 As shown, the first lamp bead 111 includes a second edge lamp bead 1111, and the second edge lamp bead 1111 is adjacent to the first edge lamp bead 1211; the spacing between the second edge lamp bead 1111 and the adjacent first lamp bead 111 is a third spacing, the third spacing and the second spacing are in the same row or column, and the third spacing is greater than the second spacing. Specifically, the second edge lamp bead 1111 is located in the gradient area 110, and the second edge lamp bead 1111 is arranged at the edge adjacent to the gradient area 110 and the uniform area 120, so the second edge lamp bead 1111 is adjacent to the first edge lamp bead 1211; the spacing between the first edge lamp bead 1211 and the second edge lamp bead 1111 is the second spacing, and the spacing between the second edge lamp bead 1111 and the adjacent first lamp bead 111 is the third spacing (as Figure 2 PX2 or PY2 in the figure), wherein the second spacing and the third spacing refer to the horizontal spacing or the vertical spacing in the same direction, that is, the second spacing and the third spacing are in the same row or the same column, and the third spacing is greater than the second spacing. Therefore, in this embodiment, starting from the first edge lamp bead 1211 in the uniform area 120, toward the edge direction of the light board 100, the spacing between the first edge lamp bead 1211 and the adjacent second edge lamp bead 1111, the spacing between the second edge lamp bead 1111 and the adjacent first lamp bead 111, and the spacing between the first lamp bead 111 and the adjacent first lamp bead 111 gradually increase, thereby ensuring that the spacing between adjacent lamp beads from the uniform area 120 to the gradient area 110 is getting larger and larger (the lamp beads include the first lamp bead 111 and the second lamp bead 121), further avoiding the bluing around the backlight module and ensuring the structural stability of the backlight module.

[0039] In one embodiment, referring to Figure 1 and Figure 2As shown, the difference between the second spacing arranged horizontally and the first spacing is consistent with the difference between the second spacing arranged vertically and the first spacing. Specifically, the second lamp beads 121 also include the first edge lamp beads 1211, the first edge lamp beads 1211 are located at the edge of the uniform area 120, the first edge lamp beads 121 and the first lamp beads 111 are on opposite sides, the spacing between the first edge lamp beads 1211 and the second lamp beads 121 is the first spacing, the spacing between the first edge lamp beads 1211 and the first lamp beads 111 is the second spacing, there are a plurality of the first edge lamp beads 1211 in the uniform area 120, the first spacing and the second spacing are arranged opposite to each other along the horizontal arrangement and / or vertical arrangement of the first edge lamp beads 1211, and the difference between the second spacing and the first spacing in the horizontal arrangement is consistent with the difference between the second spacing and the first spacing in the vertical arrangement, thereby ensuring the structural stability of the lamp board 100 and facilitating the calculation of the gradual arrangement of the first lamp beads 111 in the gradual area 110.

[0040] In one embodiment, referring to Figure 1 and Figure 2 As shown, the first lamp beads 111 and the second lamp beads 121 are in an aligned row and column structure. Specifically, the first lamp beads 111 are located in the gradient area 110, and the second lamp beads 121 are located in the uniform area 120. All the first lamp beads 111 and all the second lamp beads 121 are set in an aligned row and column structure, so that the first lamp beads 111 and the second lamp beads 121 are neatly arranged on the lamp board 100 to improve the structural stability of the lamp board 100. At the same time, the light sources of the first lamp beads 111 and the second lamp beads 121 are uniform, which improves the imaging stability of the backlight module.

[0041] In a specific embodiment, refer to Figure 1 and Figure 2 As shown, the spacing between adjacent second lamp beads 121 arranged horizontally is different from the spacing between adjacent second lamp beads 121 arranged vertically. Specifically, in the uniform area 120, the second lamp beads 121 are uniformly arranged in the uniform area 120, the spacing between adjacent second lamp beads 121 arranged horizontally is consistent, and the spacing between adjacent second lamp beads 121 arranged vertically is also consistent, but the spacing between adjacent second lamp beads 121 arranged horizontally is different from the spacing between adjacent second lamp beads 121 arranged vertically, so that the light panels 100 of different sizes and different OD values ​​can be adapted.

[0042] In one embodiment, the gradient area 110 further includes an opening (not shown in the figure), and the opening is used for wiring. Specifically, since the gradient area 110 adopts the partition design, and the first lamp beads 111 of the gradient area 110 are arranged in a gradient manner, the gradient area 110 has more wiring space, and the opening is opened on the gradient area 110, and the opening is set according to the back panel of the backlight module. The opening is used for wiring, so that the wiring space of the lamp board 100 is larger, the integration of the backlight module is improved, and the line is neater.

[0043] The present application also provides a display device (not shown in the figure), which includes a backlight module. The backlight module is any of the backlight modules described above. Since the backlight module is described in detail in the above embodiments, it will not be repeated here.

[0044] Since the display device adopts the backlight module of this embodiment, the phenomenon of bluish surrounding of the backlight module is reduced or eliminated, thereby improving the quality of the display device, and the process is simple and the production cost is low.

[0045] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A backlight module, characterized in that: include: The light board comprises a gradient region, wherein the gradient region is arranged at an edge of the light board close to the light board along the circumference of the light board; The plurality of first lamp beads located in the gradient area are arranged in a gradient manner, and the closer to the edge of the light board, the larger the distance between adjacent first lamp beads.

2. The backlight module according to claim 1, characterized in that: The gradient region includes a plurality of partitions, and the total number of rows or columns of the first lamp beads in the gradient region is an integer multiple of n rows or n columns of each partition, wherein n is a natural number.

3. The backlight module according to claim 1, characterized in that: The lamp board further comprises a uniform region, which is arranged in the middle of the lamp board along the circumference of the lamp board and adjacent to the gradient region; wherein the plurality of second lamp beads located in the uniform region are arranged uniformly.

4. The backlight module according to claim 3, characterized in that: The second lamp beads include first edge lamp beads, the first edge lamp beads are located at the edge of the uniform area, the spacing between the first edge lamp beads and the adjacent second lamp beads is a first spacing; the spacing between the first edge lamp beads and the adjacent first lamp beads is a second spacing, the second spacing and the first spacing are in the same row or column, and the second spacing is greater than the first spacing.

5. The backlight module according to claim 4, characterized in that: The first lamp bead includes a second edge lamp bead, and the second edge lamp bead is adjacent to the first edge lamp bead; the spacing between the second edge lamp bead and the adjacent first lamp bead is a third spacing, the third spacing and the second spacing are in the same row or column, and the third spacing is greater than the second spacing.

6. The backlight module according to claim 4, characterized in that: The difference between the second spacing and the first spacing in the horizontal arrangement is consistent with the difference between the second spacing and the first spacing in the vertical arrangement.

7. The backlight module according to claim 3, characterized in that: The first lamp beads and the second lamp beads are in an aligned row and column structure.

8. The backlight module according to claim 3, characterized in that: The spacing between adjacent second lamp beads arranged in a transverse direction is different from the spacing between adjacent second lamp beads arranged in a longitudinal direction.

9. The backlight module according to claim 1, characterized in that: The gradient region further includes an opening, and the opening is used for wiring.

10. A display device, characterized in that: include: A backlight module, wherein the backlight module is the backlight module according to any one of claims 1 to 9.

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