Direct type backlight module and display device

Abstract

This application discloses a direct-lit backlight module and display device. The backlight module includes a housing and a lamp board. The housing includes a first arc-shaped edge and a second arc-shaped edge arranged opposite each other along a first direction. The housing also has a first region and a second region arranged along the first direction. The lamp board includes a driving substrate and a plurality of LEDs located on the driving substrate. The plurality of LEDs are arranged on the driving substrate corresponding to the first region and the second region. The spacing between adjacent LEDs along the first direction is defined as a first spacing. The spacing between every two adjacent LEDs in the same column along a second direction is defined as a second spacing. The plurality of first spacings are set equally. The second spacings of different columns in the same region are set to first increase and then decrease along the first direction. The arrangement direction of the plurality of LEDs in different columns along the second direction close to the corresponding arc-shaped edge is fitted with the corresponding arc-shaped edge. In this way, the brightness of the first region and the second region of the backlight module is consistent.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a direct-lit backlight module and display device. Background Technology

[0002] In the field of automotive display devices, streaming rearview mirrors, as a key component replacing traditional optical reflectors, can display data collected by cameras at the rear of the vehicle on their display panels. However, the uneven light emission of streaming rearview mirrors results in poor display quality. Utility Model Content

[0003] This application provides a direct-lit backlight module and a rearview mirror, which can improve the uneven light emission of streaming media rearview mirrors, resulting in poor display effects, and at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a direct-lit backlight module is provided, the direct-lit backlight module comprising:

[0005] A shell having an internal space, the shell including a first arc-shaped side and a second arc-shaped side disposed opposite to each other along a first direction;

[0006] The housing has a first region and a second region disposed along the first direction, the first arcuate edge defining a portion of the first region and the second arcuate edge defining a portion of the second region;

[0007] A lamp board is located in the internal space of the housing. The lamp board includes a driving substrate and a plurality of lamp beads located on the driving substrate. The plurality of lamp beads are disposed on the driving substrate corresponding to the first region and the second region.

[0008] In this context, the spacing between adjacent LED beads along a first direction within at least one of the first and second regions is defined as the first spacing, and the spacing between every two adjacent LED beads in the same column along a second direction is defined as the second spacing.

[0009] Multiple first spacings are set equally, and the second spacings of different columns located in the same area are set to first increase and then decrease along the first direction; the arrangement direction of the multiple different columns of lamp beads close to the corresponding arc edge along the second direction is fitted with the corresponding arc edge;

[0010] The first direction and the second direction are intersecting.

[0011] Optionally, the second spacing of different columns gradually increases according to a first preset difference and gradually decreases according to a second preset difference;

[0012] Wherein, the first preset difference is less than the second preset difference.

[0013] Optionally, the housing further includes a third arc-shaped side and a straight side disposed opposite to each other along the second direction, wherein the first arc-shaped side, the third arc-shaped side, the second arc-shaped side and the straight side are connected end to end in sequence;

[0014] The shell further has a third region, which is partially defined by the third arcuate side and the straight side, and the third region is located between the first region and the second region along the first direction;

[0015] The LED beads are disposed on the driving substrate corresponding to the third region. The spacing between adjacent LED beads along the first direction is defined as the third spacing, and the spacing between every two adjacent LED beads in the same column along the second direction is defined as the fourth spacing.

[0016] The third spacing is set equally for multiple columns, and the fourth spacing of different columns is set along the first direction in a trend of gradually increasing, remaining constant, and gradually decreasing; the arrangement direction of the lamp beads of multiple different columns close to the third arc edge along the second direction is fitted with the third arc edge.

[0017] Optionally, the LEDs in the first region and the second region are symmetrically arranged about the third region; and the ratio of the area of ​​the first region to the area of ​​the third region is between 0.08 and 0.1.

[0018] Optionally, the spacing between the plurality of LED beads located in the first region, the second region, and the third region is equal along the first direction.

[0019] Optionally, in at least one of the first region, the second region, and the third region, the spacing between every two adjacent LEDs in the same column along the second direction is equal.

[0020] Optionally, the backlight module further includes an optical layer structure located on the side of the lamp beads away from the driving substrate.

[0021] Optionally, the optical layer structure includes a first reflector sheet, which is attached to the inner side of the housing and surrounds at least a portion of the driving substrate and the LED beads located on the driving substrate, so as to reflect light beams emitted from at least the first region and the second region.

[0022] Optionally, the optical layer structure further includes a diffuser plate and a second reflector, wherein the diffuser plate is located on the side of the lamp bead away from the driving substrate, and the second reflector is disposed on the outer peripheral wall of the diffuser plate corresponding to the intersection of the first arc-shaped edge and the third arc-shaped edge and the intersection of the third arc-shaped edge and the second arc-shaped edge.

[0023] According to a second aspect of this application, a rearview mirror is provided, the rearview mirror including a direct-lit backlight module as described above.

[0024] The beneficial effect of this application is that it provides a direct-lit backlight module and rearview mirror that improves the uneven light emission of streaming media rearview mirrors, which leads to poor display effect of the rearview mirror.

[0025] More specifically, some embodiments of this application may produce the following specific beneficial effects:

[0026] The direct-lit backlight module of this application embodiment includes a housing and a lamp board. The housing has an internal space, and the lamp board is located in the internal space. The housing includes a first arc-shaped edge and a second arc-shaped edge arranged opposite to each other along a first direction. The housing also has a first region and a second region arranged along the first direction, with the first arc-shaped edge defining a portion of the first region and the second arc-shaped edge defining a portion of the second region. The lamp board includes a driving substrate and a plurality of lamps located on the driving substrate. The plurality of lamps are arranged on the driving substrate corresponding to the first region and the second region. In at least one region of the first region and the second region, the spacing between adjacent lamps along the first direction is defined as a first spacing, and the spacing between every two adjacent lamps in the same column along the second direction is defined as a second spacing. The plurality of first spacings are set equally, and the second spacing of different columns in the same region is set to first increase and then decrease along the first direction. The arrangement direction of the plurality of lamps in different columns along the second direction close to the corresponding arc-shaped edge is fitted with the corresponding arc-shaped edge. The first direction and the second direction intersect. The above technical solution can ensure the brightness consistency of the first and second regions corresponding to the arc edge of the housing in the backlight module, avoiding uneven light emission of the streaming media rearview mirror, which would result in poor display effect of the rearview mirror.

[0027] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0030] Figure 1 This is a schematic diagram of the overall structure of the backlight module provided in an exemplary embodiment of this application;

[0031] Figure 2 This is an exploded view of the backlight module provided in an exemplary embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the connection structure between the lamp board, the first reflector, and the housing provided in an exemplary embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the area of ​​the light panel provided in an exemplary embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the first region provided in an exemplary embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the third region provided in an exemplary embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the second region provided in an exemplary embodiment of this application;

[0037] Figure 8 This is a schematic diagram of the structure of the lamp panel provided in an exemplary embodiment of this application;

[0038] Figure 9 This is a schematic diagram of the first reflective sheet provided in an exemplary embodiment of this application;

[0039] Figure 10 This is another schematic diagram of the overall structure of the backlight module provided in the exemplary embodiment of this application;

[0040] Figure 11 yes Figure 10 A schematic diagram of the cross-sectional structure along the middle AA.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100. Backlight module;

[0043] 110. Shell; 111. Inner shell; 1111. Base plate; 1112. Side plate; 112. Outer shell; 1121. Frame; 1122. Extension edge;

[0044] 110a, Internal space; 100b, First region; 100c, Second region; 100d, Third region;

[0045] 113. First curved edge; 114. Second curved edge; 115. Third curved edge; 116. Straight edge;

[0046] 120. Lamp board; 121. Driver board; 122. Lamp beads;

[0047] H1, first spacing; H2, second spacing; H3, third spacing; H4, fourth spacing;

[0048] 130. Optical layer structure; 131. First reflective sheet; 132. Diffuser plate; 133. Second reflective sheet; 134. Third reflective sheet; 135. Diffuser plate; 136. First brightness enhancement film; 137. Second brightness enhancement film;

[0049] 140. Thermal conductive component; 150. Foam;

[0050] 10. Rearview mirror. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0052] Reference Figure 1 As shown, for ease of explanation, the corresponding figures use the orientations of up, down, left, right, front, and back to illustrate the relative positional relationships between the parts in this application. These should not be construed as limitations on absolute positions.

[0053] Furthermore, in this application, the first direction corresponds to the left-right direction (i.e., the length direction of the backlight module 100), the second direction corresponds to the up-down direction (i.e., the width direction of the backlight module 100), and the third direction corresponds to the front-back direction (i.e., the thickness direction of the backlight module 100). Similarly, the first direction here indicates the left-right direction only for the convenience of introducing the specific embodiments of this application. There is no absolute correspondence between the first direction and the left-right direction. Similarly, there is no absolute correspondence between the second direction and the up-down direction, and between the third direction and the front-back direction.

[0054] The first, second, and third directions in this application are only for expressing relative positional relationships; they merely indicate approximate locations rather than absolute geometric relationships.

[0055] According to a first aspect of this application, a direct-lit backlight module 100 is provided, with reference to... Figure 1 , Figure 2, Figure 3 , Figure 4 and Figure 8 The direct-lit backlight module 100 includes a housing 110 and a lamp panel 120. In this embodiment, the housing 110 has an internal space 110a, and the lamp panel 120 is disposed within the internal space 110a. The housing 110 includes a first arcuate edge 113 and a second arcuate edge 114 disposed opposite each other along a first direction. The housing 110 also has a first region 100b and a second region 100c disposed along the first direction, with the first arcuate edge 113 defining a portion of the first region 100b and the second arcuate edge 114 defining a portion of the second region 100c. The lamp panel 120 includes a driving substrate 121 and a plurality of lamp beads 122 located on the driving substrate 121, with the plurality of lamp beads 122 disposed on the driving substrate 121 corresponding to the first region 100b and the second region 100c.

[0056] In this configuration, within at least one of the first region 100b and the second region 100c, the spacing between adjacent LED beads 122 along the first direction is defined as the first spacing H1, and the spacing between every two adjacent LED beads 122 in the same column along the second direction is defined as the second spacing H2. Multiple first spacings H1 are set equally, and the second spacings H2 in different columns within the same region are first increased and then decreased along the first direction. The arrangement direction of multiple LED beads 122 in different columns along the second direction close to the corresponding arc edge is fitted to the corresponding arc edge. The first direction and the second direction intersect.

[0057] The above technical solution can ensure the brightness consistency of the first region 100b and the second region 100c of the backlight module 100 corresponding to the arc edge of the housing 110, thus avoiding uneven light emission of the streaming media rearview mirror 10 and resulting in poor display effect of the rearview mirror 10.

[0058] For example, refer to Figure 5Within the first region 100b, multiple LEDs 122 are arranged in rows on the driving substrate 121 along a first direction (i.e., the left-right direction). From left to right, they include a first row of LEDs L1, a second row of LEDs L2, a third row of LEDs L3, and a fourth row of LEDs L4. The spacing between the first row of LEDs L1 and the second row of LEDs L2, the spacing between the second row of LEDs L2 and the third row of LEDs L3, and the spacing between the third row of LEDs and the fourth row of LEDs are all defined as a first spacing H1, and the first spacing H1 between the rows is set to be equal. The spacing between LED beads 122 in the same column in the second direction (i.e., the vertical direction) is defined as the second spacing H2. The second spacing H2 of each of the first, second, third, and fourth columns of LED beads increases and then decreases along the first direction from left to right. In this way, the density of each column of LED beads in the first region 100b gradually decreases and then increases from left to right. Under this condition, the brightness of the left edge of the first region 100b can be increased, and the situation of the left edge of the first region 100b being dark can be avoided.

[0059] For example, refer to Figure 7 In the second region 100c, multiple LEDs 122 are arranged in rows on the driving substrate 121 along the first direction (i.e., the left-right direction), including the fifth row of LEDs L5, the sixth row of LEDs L6, the seventh row of LEDs L7 and the eighth row of LEDs L8 from right to left. The spacing between the fifth row of LEDs L5 and the sixth row of LEDs L6, the spacing between the sixth row of LEDs L6 and the seventh row of LEDs L7, and the spacing between the seventh row of LEDs L7 and the eighth row of LEDs L8 along the first direction are all defined as the first spacing H1. Therefore, the first spacing H1 between the columns is set to be equal. The spacing between LEDs 122 in the same column (5th column L5, 6th column L6, 7th column L7, and 8th column L8) in the second direction (i.e., the vertical direction) is defined as the second spacing H2. The second spacing H2 of each of the LEDs 122 in the fifth column L5, the sixth column L6, the seventh column L7, and the eighth column L8 increases and then decreases along the first direction from right to left. In this way, the density of each column of LEDs in the second region 100c gradually decreases and then increases from right to left. Under this condition, the brightness of the left edge of the second region 100c can be increased, and the situation of the left edge of the second region 100c being dark can be avoided.

[0060] In this embodiment, by setting the spacing between the multiple LED beads 122 in the first region 100b and the second region 100c, the density of LED beads 122 in the first region 100b and the second region 100c can be improved. Furthermore, the arrangement direction of each column of LED beads 122 in the first region 100b along the second direction can fit the shape of the first arc-shaped edge 113, and the arrangement direction of each column of LED beads 122 in the second region 100c along the second direction can fit the shape of the second arc-shaped edge 114. This can improve the situation where the brightness of the first arc-shaped edge 113 and the second arc-shaped edge 114 of the housing 110 is dark. Thus, even when the housing 110 is constructed in an irregular shape (non-rectangular), the edge light effect consistency of its first region 100b and the second region 100c is also better.

[0061] It should be noted that, within the first region 100b and the second region 100c, the arrangement direction of the LED beads 122 along the second direction close to the corresponding arc edge (i.e., the first arc edge 113 and the second arc edge 114) in multiple different columns is defined as the first arrangement direction F1. The fitting of the first arrangement direction F1 with the corresponding arc edge means that the first arrangement direction F1 is consistent with the extension direction of the arc edge. It can also be understood as the spatial distribution of the LED beads close to the corresponding arc edge being consistent with the geometric features of the arc edge of the shell.

[0062] refer to Figure 5 and Figure 7 In the embodiments of this application, the number of LED beads in the first column L1 to the fourth column L4 increases sequentially, and the number of LED beads in the fifth column L5 to the eighth column L8 also increases sequentially.

[0063] In some embodiments, the second spacing H2 of different columns gradually increases according to a first preset difference △X1 and gradually decreases according to a second preset difference △X2. That is, the trend of the second spacing H2 of different columns along the first direction is a slow increase followed by a rapid decrease. In this way, the LED beads 122 near the curved edge can be arranged more densely, avoiding the curved edge from becoming dark, and also avoiding the area far from the curved edge from being too bright.

[0064] It should be noted that the first preset difference △X1 refers to the incremental value between adjacent columns of the second spacing H2 during the increasing phase. For example, from the first column of LED beads L1 to the second column of LED beads L2, the second spacing H2 increases by △X1; from the second column of LED beads L2 to the third column of LED beads L3, △X1 is increased again, forming a slow increasing trend.

[0065] The second preset difference △X2 refers to the reduction value between adjacent columns during the reduction phase. For example, from the third column of LED beads L3 to the fourth column of LED beads L4, the second spacing H2 decreases by △X2, and △X2 is greater than △X1, thus forming a rapid reduction trend.

[0066] For example, in the first region 100b, the second spacing H2 between two adjacent LEDs 122 in the first column L1 along the second direction is set to 1.8 mm; the second spacing H2 between two adjacent LEDs 122 in the second column L2 along the second direction is set to 1.9 mm; the second spacing H2 between two adjacent LEDs 122 in the third column L3 along the second direction is set to 2 mm; and the second spacing H2 between two adjacent LEDs 122 in the fourth column L4 along the second direction is set to 1.8 mm. That is, the spacing gradually increases from the first column L1 to the third column L3 according to a first preset difference ΔX1 of 0.1 mm, while it decreases from the third column L3 to the fourth column L4 according to a second preset difference ΔX2 of 0.2 mm. This demonstrates that the increasing trend of the second spacing H2 along the first direction in the first region 100b is less than the decreasing trend.

[0067] Of course, in some other embodiments, the second spacing H2 between each column of LEDs in the first region 100b can also be other values, as long as it gradually increases and then decreases.

[0068] In some embodiments, reference Figure 6 The housing 110 also includes a third arcuate edge 115 and a straight edge 116 disposed opposite to each other along a second direction, with the first arcuate edge 113, the third arcuate edge 115, the second arcuate edge 114, and the straight edge 116 connected end to end in sequence. The housing 110 also has a third region 100d, which is partially defined by the third arcuate edge 115 and the straight edge 116, and is located between the first region 100b and the second region 100c along a first direction. LED beads 122 are disposed on the third region 100d corresponding to the driving substrate 121. The spacing between adjacent LED beads 122 along the first direction is defined as the third spacing H3. The spacing between every two adjacent LED beads 122 in the same column along the second direction is defined as the fourth spacing H4. Multiple third spacings H3 are set equally. The fourth spacings H4 in different columns are set along the first direction in a trend of first increasing and then decreasing. The arrangement direction of multiple LED beads 122 in different columns along the second direction close to the third arc edge 115 is fitted with the third arc edge 115.

[0069] The LED beads 122 are arranged in a row along the first direction on the drive substrate 121 within the third region 100d between the first region 100b and the second region 100c. The third region 100d is partially defined by the third arc-shaped edge 115 and the straight edge 116, thus forming a housing 110 with an arc-shaped segment. The LED beads 122 on the driving substrate 121 corresponding to the third region 100d are arranged in multiple rows of LED beads from left to right along the first direction. The multiple third spacings H3 between adjacent rows along the first direction are all set equally, while the fourth spacings H4 of different rows are set along the first direction in a trend of gradually increasing, remaining constant, and gradually decreasing. In this way, the density of LED beads 122 in the third region 100d gradually decreases, remains constant, and then increases from left to right, so as to improve the inconsistent light emission brightness of the third region 100d. In addition, the arrangement direction of multiple different rows of LED beads 122 close to the third arc edge 115 along the second direction is fitted with the third arc edge 115, so as to avoid the situation that the brightness is darker near the third arc edge 115 in the third region 100d.

[0070] It should be noted that the reference is... Figure 6 The arrangement direction of multiple different columns of LED beads 122 close to the third arc edge 115 along the second direction is defined as the second arrangement direction F2. The fitting of the second arrangement direction F2 with the corresponding arc edge means that the second arrangement direction F2 is consistent with the extension direction of the third arc edge 115. It can also be understood as the spatial distribution of LED beads close to the corresponding third arc edge 115 being consistent with the geometric features of the third arc edge 115 of the shell.

[0071] In this embodiment of the application, when the LED beads 122 in the corresponding first region 100b, second region 100c and third region 100d are arranged in the above arrangement, the linearity of uneven light emission of the backlight module 100 as a whole and the phenomenon of dim light effect near the edge area can be improved, and the overall light effect can be optimized to the greatest extent.

[0072] For example, refer to Figure 6 Along the first direction, from left to right, the LEDs are arranged as follows: the ninth column L9, the tenth column L10, the eleventh column, ..., the nineteenth column, the twentieth column, ..., the forty-fourth column, the forty-fifth column L45, and the forty-sixth column L46. The ninth column L9 is adjacent to the fourth column L4, while the forty-sixth column L46 is adjacent to the eighth column L8. The fourth spacing H4 between the ninth and nineteenth columns gradually increases; the fourth spacing H4 between the nineteenth and twentieth columns is equal; and the fourth spacing H4 between the twentieth and forty-sixth columns gradually decreases.

[0073] In this embodiment, the second spacing H2 of the fourth column of LED beads L4 is set to be equal to the fourth spacing H4 of the ninth column of LED beads, achieving the transition between the first region 100b and the third region 100d. Similarly, the fourth spacing H4 of the forty-sixth column of LED beads L46 is set to be the same as the second spacing H2 of the eighth column of LED beads, thus achieving the transition between the second region 100c and the third region 100d. For example, the second spacing H2 of the fourth column of LED beads and the fourth spacing H4 of the ninth column of LED beads are both set to 1.8mm.

[0074] It should be noted that the fourth spacing H4 between the ninth row of LEDs L9 and the nineteenth row of LEDs can be gradually increased according to the third preset difference of 0.01mm. The fourth spacing H4 between the nineteenth row of LEDs and the twentieth row of LEDs remains unchanged, while the fourth spacing H4 between the twentieth row of LEDs and the forty-sixth row of LEDs L46 can be gradually decreased according to the third preset difference of 0.01mm.

[0075] Of course, you can also set the third preset difference according to other values ​​so that the value of the fourth spacing H4 of different columns in the third region 100d first increases, remains unchanged, and then decreases.

[0076] The third preset difference has the same meaning as the first spacing difference △X1 and the second spacing difference △X2, and will not be elaborated here.

[0077] The lamp bead 122 in this embodiment is an LED lamp bead.

[0078] In this embodiment of the application, to further ensure the consistency of edge luminous efficacy between the first region 100b and the second region 100c, in some embodiments, the LEDs 122 in the first region 100b and the second region 100c are symmetrically arranged with respect to the third region 100d, and the ratio of the area of ​​the first region 100b to the area of ​​the third region 100d ranges from 0.08 to 0.1. That is, on the driving substrate 121, the arrangement of the LEDs 122 corresponding to the first region 100b is exactly the same as the arrangement of the LEDs 122 corresponding to the second region 100c, and the first arc-shaped edge 113 and the second arc-shaped edge 114 are also set in the same manner.

[0079] By symmetrically arranging the LEDs 122 in the first region 100b and the second region 100c about the third region 100d, the overall light effect can be optimized by coordinating the arrangement of the LEDs 122 in the third region 100d.

[0080] The ratio of the area of ​​the first region 100b to the area of ​​the third region 100d ranges from 0.08 to 0.1. The area of ​​the first region is relatively small. Through the high-density arrangement of LED beads and the gradient design of the second spacing, the light energy can be concentrated to compensate for the dark area of ​​the curved edge, avoiding the problem that the brightness of the third region may be insufficient due to the large area of ​​the first region.

[0081] For example, the area ratio of the first region 100b to the area of ​​the third region 100d is 0.08, 0.09, and 0.10. This is not a limitation.

[0082] In some embodiments, the plurality of LED beads 122 located in the first region 100b, the second region 100c, and the third region 100d are all equally spaced along the first direction. That is, the first spacing H1 between different columns of LED beads in the first region 100b, the first spacing H1 between different columns of LED beads in the second region 100c, and the third spacing H3 between different columns of LED beads in the third region 100d are all equal on the driving substrate 121. For example, the first spacing H1 and the third spacing H3 can be set to 2 mm, which also facilitates the forming of the plurality of LED beads 122 along the first direction on the driving substrate 121.

[0083] In some embodiments, in at least one of the first region 100b, the second region 100c, and the third region 100d, the spacing between every two adjacent LED beads 122 located in the same column along the second direction is equal.

[0084] For example, the second spacing H2 of each pair of adjacent LED beads 122 in the first column L1 along the second direction is 1.8 mm, while the second spacing H2 of each pair of adjacent LED beads 122 in the second column L2 along the second direction is 1.9 mm. The spacing of each pair of adjacent LED beads 122 along the second direction in each column of LED beads in the second region 100c and the third region 100d is equal, that is, the second spacing H2 of each column of LED beads in the second region 100c is the same as the second spacing H2 of the first region 100a, and the fourth spacing H4 of LED beads in each column of the third region 100d is also the same, that is, the fourth spacing H4 between each pair of adjacent LED beads in each column is the same. The specific value of the spacing between two LED beads in each column along the second direction is subject to actual setting and is not limited here.

[0085] In this embodiment of the application, reference is made to Figure 11 In order to further improve the light beam emitted by the LED 122, in some embodiments, the backlight module 100 also includes an optical layer structure 130 located on the side of the LED 122 away from the driving substrate 121.

[0086] In some embodiments, reference Figure 2 and Figure 9 The optical layer structure 130 includes a first reflector 131, which is attached to the inner side of the housing 110 and surrounds at least a portion of the driving substrate 121 and the lamp bead 122 located on the driving substrate 121, so as to reflect at least the light beams emitted from the first region 100b and the second region 100c.

[0087] By setting the first reflective sheet 131, the first reflective sheet 131 is attached to the inner side of the housing 110, and can surround at least a portion of the driving substrate 121 and the lamp beads 122 located on the driving substrate 121, the light emitted by the lamp beads 122 can be reflected laterally and concentrated in the middle area, thereby reducing light energy loss and improving light energy utilization.

[0088] For example, refer to Figure 2 The first reflector 131 is constructed to correspond to the shape of the housing 110. That is, the outline of the first reflector also has arc-shaped edges and straight edges, which can fit with the inner wall surface of the housing 110. With the coordination of the arrangement of the lamp beads 122 on the driving substrate 121, the phenomenon of poor edge light efficiency of the backlight module 100 can be further improved.

[0089] The reflective sheet in this embodiment is made of a material capable of reflecting light beams, such as white PET material.

[0090] In this embodiment, the total thickness of the driving substrate 121 and the lamp bead 122 is 1.57 mm. The thickness of the first reflective sheet 131 along the thickness direction of the backlight module 100 is 3.61 mm, and the thickness of the first reflective sheet 131 along the left-right direction is 0.24 mm. Its length is 234.53 mm, and its width is 50.76 mm. This technical solution allows the first reflective sheet 131 to completely surround the driving substrate 121 and the lamp bead 122.

[0091] In this embodiment, the housing 110 includes an outer shell 112 and an inner shell 111, which are embedded together to achieve connection. The inner shell 111 includes a bottom plate 1111 and a side plate 1112. The bottom plate 1111 is connected to the driving substrate 121, and the side plate 1112 surrounds the driving substrate 121 and the LED bead 122 located on the driving substrate 121. The first reflector 131 is attached to the inner side of the side plate 1112. The outer shell 112 is constructed as an annular frame, which includes a frame body 1121 and an extension edge 1122. A frame groove is formed between the frame body 1121 and the extension edge 1122. A portion of the side plate 1112 is inserted into the frame groove to achieve the connection between the outer shell 112 and the inner shell 111.

[0092] In this embodiment of the application, foam 150 may also be provided on the extension edge 1122.

[0093] For example, the portion of the extended edge 1122 that corresponds to the first arc-shaped edge 113 and the second arc-shaped edge 114 has a length dimension of 2.75 mm, the portion of the extended edge 1122 that corresponds to the third arc-shaped edge 115 has a width dimension of 2.75 mm, and the portion of the extended edge 1122 that corresponds to the straight edge has a width dimension of 3.5 mm.

[0094] For example, two through holes with a radius of 1.05 mm can be opened at the positions of the arc-shaped edges of the first region 100b and the second region 100c on the drive substrate, and the two through holes can be used to connect with the bottom plate 1111 of the housing 110 by fasteners.

[0095] In some embodiments, the optical layer structure 130 further includes a diffuser plate 132 and a second reflector 133, wherein the diffuser plate 132 is located on the side of the lamp bead 122 away from the driving substrate 121, and the second reflector 133 is provided on the outer peripheral wall of the diffuser plate 132 at the intersection of the first arc-shaped edge 113 and the third arc-shaped edge 115 and at the intersection of the third arc-shaped edge 115 and the second arc-shaped edge 114.

[0096] In this embodiment, second reflective sheets 133 are respectively provided at the intersection of the first arc-shaped edge 113 and the third arc-shaped edge 115 and at the intersection of the third arc-shaped edge 115 and the second arc-shaped edge 114 of the diffuser plate 132, which can further improve the phenomenon of the first arc-shaped edge 113 and the second arc-shaped edge 114 of the housing 110 being dark. In this embodiment, the diffuser plate 132 is located on one side of the lamp bead 122 driving substrate 121 and is spaced apart from the lamp bead 122.

[0097] In this embodiment, the diffuser plate 132 has a thickness of 1.2 mm, a length of 235.67 mm, and a width of 54.31 mm.

[0098] In this embodiment of the application, the optical layer structure 130 further includes a diffuser sheet 135. The thickness of the diffuser sheet 135 is less than the thickness of the diffuser plate 132, and the diffuser sheet 135 is located on the side of the diffuser plate 132 away from the lamp bead 122. The diffuser sheet 135 is attached to the diffuser plate 132.

[0099] The optical layer structure 130 in this embodiment further includes a first brightness enhancement film 136 and a second brightness enhancement film 137, which are stacked on the side of the diffuser 135 away from the diffuser plate 132. The second brightness enhancement film 137 is located between the first brightness enhancement film 136 and the diffuser 135.

[0100] In some embodiments, the backlight module 100 further includes a heat-conducting element 140, which is located on the side of the driving substrate 121 away from the lamp beads 122, and is capable of dissipating heat from the backlight module 100. (Reference) Figure 11 The heat-conducting component 140 is located between the drive base plate 121 and the bottom plate 1111 of the housing 110.

[0101] In summary, the direct-lit backlight module 100 in this embodiment is an irregularly shaped direct-lit backlight module 100. The LEDs 122 on the lamp plate 120 can be arranged and distributed according to the arc edge of the housing 110. The first reflective sheet 131 is installed on the inner sidewall of the housing 110, and the third reflective sheet 134 is set at the position corresponding to the arc edge of the diffuser plate 132. This effectively improves the edge light effect of the arc edge of the backlight module 100. With the diffuser plate 132, diffuser sheet 135, first brightness enhancement film 136, and second brightness enhancement film 137, it can not only meet the high brightness requirements, but also significantly reduce the width of the housing 110 of the module, meeting the narrow bezel requirements.

[0102] According to the second aspect of this application, reference to Figure 10 and Figure 11 This application provides a display device 10, including the direct-lit backlight module 100 as described above. The display device 10 in this embodiment includes an in-vehicle display device, such as a streaming media rearview mirror 10.

[0103] The display device 10 in this embodiment adopts the direct-lit backlight module 100 described above, and therefore has all the beneficial effects of the direct-lit backlight module 100 described above, which will not be elaborated here.

[0104] In the description of this application, 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0105] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0106] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0107] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A direct-lit backlight module, characterized in that, The direct-lit backlight module includes: A shell having an internal space, the shell including a first arcuate side and a second arcuate side disposed opposite to each other along a first direction; The housing has a first region and a second region disposed along the first direction, the first arcuate edge defining a portion of the first region and the second arcuate edge defining a portion of the second region; A lamp board is located in the internal space of the housing. The lamp board includes a driving substrate and a plurality of lamp beads located on the driving substrate. The plurality of lamp beads are disposed on the driving substrate corresponding to the first region and the second region. In this context, the spacing between adjacent LED beads along a first direction within at least one of the first and second regions is defined as the first spacing, and the spacing between every two adjacent LED beads in the same column along a second direction is defined as the second spacing. Multiple first spacings are set equally, and the second spacings of different columns located in the same area are set to first increase and then decrease along the first direction; the arrangement direction of the multiple different columns of lamp beads close to the corresponding arc edge along the second direction is fitted with the corresponding arc edge; The first direction and the second direction are intersecting.

2. The direct-lit backlight module according to claim 1, characterized in that, The second spacing of different columns gradually increases according to a first preset difference and gradually decreases according to a second preset difference; Wherein, the first preset difference is less than the second preset difference.

3. The direct-lit backlight module according to claim 1, characterized in that, The housing also includes a third arc-shaped side and a straight side arranged opposite to each other along the second direction, wherein the first arc-shaped side, the third arc-shaped side, the second arc-shaped side and the straight side are connected end to end in sequence; The shell further has a third region, which is partially defined by the third arcuate side and the straight side, and the third region is located between the first region and the second region along the first direction; The LED beads are disposed on the driving substrate corresponding to the third region. The spacing between adjacent LED beads along the first direction is defined as the third spacing, and the spacing between every two adjacent LED beads in the same column along the second direction is defined as the fourth spacing. The third spacing is set equally for multiple columns, and the fourth spacing of different columns is set along the first direction in a trend of gradually increasing, remaining constant, and gradually decreasing; the arrangement direction of the lamp beads of multiple different columns close to the third arc edge along the second direction is fitted with the third arc edge.

4. The direct-lit backlight module according to claim 3, characterized in that, The LEDs in the first and second regions are symmetrically arranged about the third region, and the ratio of the area of ​​the first region to the area of ​​the third region ranges from 0.08 to 0.

1.

5. The direct-lit backlight module according to claim 3, characterized in that, The spacing between the plurality of LED beads located in the first region, the second region, and the third region is equal along the first direction.

6. The direct-lit backlight module according to claim 3, characterized in that, In at least one of the first region, the second region, and the third region, the spacing between every two adjacent LEDs in the same column along the second direction is equal.

7. The direct-lit backlight module according to any one of claims 3 to 6, characterized in that, The backlight module also includes an optical layer structure located on the side of the LED chip away from the driving substrate.

8. The direct-lit backlight module according to claim 7, characterized in that, The optical layer structure includes a first reflector sheet, which is attached to the inner side of the housing and surrounds at least a portion of the driving substrate and the LED beads located on the driving substrate, so as to reflect light beams emitted from at least the first region and the second region.

9. The direct-lit backlight module according to claim 7, characterized in that, The optical layer structure further includes a diffuser plate and a second reflector sheet, wherein the diffuser plate is located on the side of the lamp bead away from the driving substrate, corresponding to the intersection of the first arc-shaped edge and the third arc-shaped edge and the intersection of the third arc-shaped edge and the second arc-shaped edge, and the second reflector sheet is disposed on the outer peripheral wall of the diffuser plate.

10. A display device, characterized in that, The display device includes the direct-lit backlight module as described in any one of claims 1 to 9.

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