Light guide plate and backlight module thereof

Abstract

The present application provides a light guide plate, which has a bottom surface and a light exit surface opposite to the bottom surface, and comprises a plurality of light guide lenses, a plurality of accommodating areas and a plurality of disconnecting portions. The plurality of light guide lenses are arranged along a first direction and a second direction, and form a light guide lens array; wherein the first direction is perpendicular to the second direction, and the first direction and the second direction are parallel to the bottom surface and the light exit surface. The plurality of accommodating areas are respectively arranged in each light guide lens, and are used for arranging at least one light emitting component. Each disconnecting portion is located between a plurality of adjacent light guide lenses, and the plurality of light guide lenses are arranged along the first direction or the second direction on both sides of each disconnecting portion. The present application also provides a backlight module.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Taiwan Patent Application No. 112105601, filed on February 16, 2023, which is incorporated herein by reference for all purposes, as if fully set forth herein. Technical Field

[0003] This invention relates to a light guide plate, and more particularly to a light guide plate and backlight module for a surface light source. Background Technology

[0004] Currently, in some planar backlights, such as LCD backlights and Mini LED backlight architectures, guiding lenses are used as light guiding methods to replace optical mixing areas (OD), achieving uniform light distribution and reduced thickness. The guiding lens has holes for mounting LEDs. The size of these holes is appropriately determined based on considerations such as light utilization and the expansion and contraction of the guiding lens material. Furthermore, guiding lenses generally come in forms such as single lenses and full-surface lenses. The former has issues with time-consuming and costly backlight manufacturing, while the latter is prone to LED damage due to material expansion and contraction. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a light guide plate that helps simplify the assembly of backlight modules. The light guide plate of this invention expands and contracts less due to temperature changes, which helps maintain flatness within the backlight module and avoids or reduces interference between the light-emitting components and the light guide plate.

[0006] The light guide plate provided by this invention has a bottom surface and a light-emitting surface opposite to the bottom surface, and includes multiple light guide lenses, multiple receiving areas, and multiple disconnections. The multiple light guide lenses are arranged along a first direction and a second direction, forming a light guide lens array; wherein the first direction is perpendicular to the second direction, and the first and second directions are parallel to the bottom surface and the light-emitting surface. Multiple receiving areas are respectively disposed in each light guide lens for accommodating at least one light-emitting component. Each disconnection is located between multiple adjacent light guide lenses, and the multiple light guide lenses are arranged along the first direction or the second direction on both sides of each disconnection.

[0007] In one embodiment of the present invention, the light guide plate has a first length in a first direction; the plurality of disconnections include a plurality of first disconnections, and each first disconnection extends along a second direction; wherein, a plurality of light guide lenses are arranged along the second direction on both sides of the first disconnection.

[0008] In an embodiment of the present application, the light guide plate further comprises a plurality of fourth cut-off portions, and the fourth cut-off portions are arranged in the second direction at a first distance; the length of the first distance is calculated according to the following function: progressive increment of expansion = thermal expansion coefficient of the light guide plate * temperature variation * length of the first distance; wherein the progressive increment of expansion is the amount of expansion of the light guide plate due to temperature increase under the temperature variation, and the progressive increment of expansion is less than or equal to the assembly tolerance.

[0009] In an embodiment of the present application, the first cut-off portion further comprises a second cut-off portion and a third cut-off portion, and the length of the second cut-off portion is greater than the length of the third cut-off portion; wherein the second cut-off portion is arranged in the light guide plate, and the third cut-off portion extends to the edge of the light guide plate.

[0010] In an embodiment of the present application, the light guide plate has a first length in the first direction and a second length in the second direction, and the first length is greater than the second length; the plurality of cut-off portions comprises at least one fourth cut-off portion, and each fourth cut-off portion extends in the first direction; wherein the plurality of light guide lenses are arranged in the first direction on both sides of the fourth cut-off portion.

[0011] In an embodiment of the present application, the light guide plate further comprises a plurality of fourth cut-off portions, and the fourth cut-off portions are arranged in the second direction at a first distance; the length of the first distance is calculated according to the following function: progressive increment of expansion = thermal expansion coefficient of the light guide plate * temperature variation * length of the first distance; wherein the progressive increment of expansion is the amount of expansion of the light guide plate due to temperature increase under the temperature variation, and the progressive increment of expansion is less than or equal to the assembly tolerance.

[0012] In an embodiment of the present application, the plurality of fourth cut-off portions further partially overlap in the second direction; the overlapping portion has a third length in the first direction, and the third length is greater than one-third of the first length.

[0013] In an embodiment of the present application, the at least one fourth cut-off portion is arranged in the light guide plate, and the length of the at least one fourth cut-off portion is greater than two-thirds of the first length.

[0014] In an embodiment of the present application, the length of the at least one fourth cut-off portion is less than one-half of the first length, and the at least one fourth cut-off portion extends to the edge of the light guide plate.

[0015] In an embodiment of the present application, the plurality of accommodation regions are a plurality of accommodation grooves, and each accommodation groove has an opening on the bottom surface of the light guide plate.

[0016] The present invention also provides a backlight module. The backlight module provided by the present invention includes a light guide plate as described above and a plurality of light-emitting components. The plurality of light-emitting components are respectively disposed in a plurality of receiving areas, wherein each light-emitting component has a gap with each receiving area.

[0017] As can be seen from the above solutions, the advantages of the present invention are:

[0018] Because this invention employs multiple breaks, the light guide plate material has room for deformation and expansion, thus minimizing the degree of expansion and contraction due to temperature changes. This allows the light guide plate to remain flat, and the light-emitting components are less susceptible to interference, collisions, or detachment. Furthermore, the multiple breaks prevent the light guide plate from being divided into multiple parts, allowing it to maintain its dimensional integrity and simplifying the assembly of the backlight module. Attached Figure Description

[0019] Figure 1 This is a top view schematic diagram of a light guide plate according to an embodiment of the present invention;

[0020] Figure 2 For along Figure 1 Cross-sectional view of section AA in the middle;

[0021] Figure 3 This is a top view of a light guide plate according to another embodiment of the present invention;

[0022] Figure 4 For along Figure 3 sectional view of the BB section line;

[0023] Figure 5 For along Figure 1 A cross-sectional view of the CC section line;

[0024] Figure 6 This is a top view of a light guide plate according to another embodiment of the present invention;

[0025] Figure 7 This is a top view schematic diagram of a light guide plate according to another embodiment of the present invention;

[0026] Figure 8 This is a top view schematic diagram of a light guide plate according to another embodiment of the present invention;

[0027] Figure 9 This is a cross-sectional schematic diagram of a backlight module according to an embodiment of the present invention;

[0028] Figure 10 This is a top view schematic diagram of a backlight module according to an embodiment of the present invention;

[0029] Figure 11 This is a top view schematic diagram of a backlight module according to an embodiment of the present invention;

[0030] in:

[0031] 1, 1a - Backlight module

[0032] 10, 10a, 10b, 10c, 10d - Light guide plate

[0033] 101 - Bottom surface

[0034] 102 - Light exit surface

[0035] 100, 100a - Light guide lens

[0036] 110 - Bottom surface

[0037] 120, 120a - Light exit surface

[0038] 200 - Containing area

[0039] 250 - Light entrance surface

[0040] 300 - Disconnection portion

[0041] 310, 310b, 310c, 310d - First disconnection portion

[0042] 320, 320b, 320c, 320d - Second disconnection portion

[0043] 330, 330b, 330c, 330d - Third disconnection portion

[0044] 340, 340b, 340c, 340d - Fourth disconnection portion

[0045] 350 - Fifth disconnection portion

[0046] 360 - Sixth disconnection portion

[0047] 400 - Bottom portion

[0048] 50 - Light emitting component

[0049] 550 - Light emitting surface

[0050] 60 - Substrate

[0051] 70 - Adhesive member

[0052] X - First direction

[0053] Y - Second direction

[0054] D1 - First distance DETAILED DESCRIPTION

[0055] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention. Furthermore, the terms "first," "second," etc., mentioned in this specification or the claims are only used to name components or distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of components.

[0056] Figure 1 This is a top view schematic diagram of a light guide plate according to an embodiment of the present invention. Figure 2 For along Figure 1 A sectional view of section line AA in the middle. (See diagram below.) Figures 1-2 As shown, in this embodiment of the invention, the light guide plate 10 has a bottom surface 101 and a light-emitting surface 102 opposite to the bottom surface 101, and the light guide plate 10 includes a plurality of light guide lenses 100. Further, the light guide plate 10 may be composed of a plurality of light guide lenses 100. In several embodiments of the invention, the light guide plate 10 may be equivalent to a light guide lens array containing a plurality of light guide lenses 100. Figure 1 As shown, multiple light guide lenses 100 are arranged in rows and columns generally along the first direction X and the second direction Y. In a preferred embodiment of the present invention, the light guide lenses 100 are generally rectangular or square, but are not limited thereto. Figure 2 As shown, each light guide lens 100 has a bottom surface 110 and a light-emitting surface 120 opposite to the bottom surface 110. Preferably, the light-emitting surface 120 may be a convex curved surface. Figures 1-2 In the embodiments, the edges of the light-emitting surfaces 120 of adjacent light guide lenses 100 are in principle connected, but not limited to this.

[0057] Figure 3 This is a top view schematic diagram of a light guide plate according to another embodiment of the present invention. Figure 4 For along Figure 3 A sectional view of the BB section line. (See diagram below.) Figures 3-4 As shown, the light guide plate 10a includes multiple light guide lenses 100a and a bottom 400, wherein the multiple light guide lenses 100a are arranged in rows and columns approximately along the first direction X and the second direction Y. Figures 1-2 The difference in the illustrated embodiment is that multiple light guide lenses 100a are disposed at the bottom 400, and adjacent light guide lenses 100a are spaced apart from each other, while the light emitting surfaces 120a are not connected.

[0058] like Figure 2As shown, the light guide plate 10 also has a plurality of receiving areas 200, each disposed in each light guide lens 100. The receiving areas 200 can be used to house light-emitting components (described later). The receiving area 200 can be, for example, in the form of a receiving groove. For example, a receiving groove is formed in the light guide lens 100. The receiving groove also has an opening 205, which is preferably located on the bottom surface 101 of the light guide plate 10. The light-emitting component can be disposed in the receiving groove through the opening 205. When the light-emitting component is housed in the receiving area 200, there is a gap between the light-emitting component and the receiving area 200. Even if the light guide plate 10 may expand or contract due to temperature changes, the gap between the light-emitting component and the receiving area 200 can still be maintained. Furthermore, the receiving area 200 is not limited to the form of a receiving groove; for example, the receiving area 200 can also be, for example, a receiving hole. Any structure that can be used to set up a light-emitting component and is suitable for the light emitted by the light-emitting component to enter the light guide plate 10 as expected can be in the form of a receiving area 200.

[0059] Figure 5 for Figures 1-2 Another cross-sectional view of the illustrated embodiment. (As shown) Figure 1 , 5 As shown, the light guide plate 10 also has a plurality of disconnected portions 300. That is, the light guide plate 10 of this embodiment has a plurality of non-connected portions. However, it is understood that the plurality of non-connected portions do not disperse the light guide plate 10 into multiple parts. In a preferred embodiment of the present invention, the disconnected portions 300 are linear and extend, for example, along a first direction X or a second direction Y. The disconnected portions 300 do not pass through the light guide lenses 100 in principle, but are preferably located between adjacent light guide lenses 100. For example, when the disconnected portion 300 extends along the first direction X, it has a plurality of light guide lenses 100 arranged along the first direction X on both sides, and when the disconnected portion 300 extends along the second direction Y, it has a plurality of light guide lenses 100 arranged along the second direction Y on both sides. Furthermore, as Figure 1 and Figure 5 As shown, the light guide lenses 100 on opposite sides of the break portion 300 are not connected, or are partially connected. Based on the multiple break portions 300 in the light guide plate 10, the degree of expansion and contraction of the light guide plate 10 due to temperature changes can be mitigated.

[0060] Furthermore, expansion can increase progressively with temperature changes. A larger number of connected light guide lenses 100 or a longer length of the light guide plate 10 can lead to a greater progressive increase in expansion. Because the light guide plate 10 of this embodiment has multiple breaks 300, it is divided into several shorter segments, and the number of connected light guide lenses 100 is reduced, thus mitigating the progressive increase in expansion. In summary, due to the breaks 300, the expansion and contraction of the light guide plate 10 due to temperature changes is smaller. Because the expansion and contraction of the light guide plate 10 is smaller, when a light-emitting component is disposed within the receiving area 200, the existence and appropriate size of the gap between the light-emitting component and the receiving area 200 can be ensured, and deformation of the light guide plate 10 can be avoided or mitigated (described later).

[0061] like Figure 1 As shown, the break portion 300 further includes a plurality of first break portions 310 extending along the second direction Y. In a preferred embodiment of the invention, the light guide plate 10 is generally rectangular and has a first length L1 in the first direction X and a second length L2 in the second direction Y, wherein the first length L1 is greater than the second length L2. The first break portions 310 may be provided at first distances D1 in the first direction X. In other words, adjacent first break portions 310 are separated by a first distance D1 in the first direction X, and the short side of the light guide plate 10 is also separated by a first distance D1 from the nearest first break portion 310.

[0062] The length of the first distance D1, for example, may be less than 40% of the first length L1. In a preferred embodiment of the invention, the length of the first distance D1 may be determined based on parameters such as the coefficient of thermal expansion of the light guide plate material, the expected temperature change (ΔT), and the cumulative increment of the expansion of the light guide plate 10 in the first direction X. The cumulative increment of expansion is the amount by which the light guide plate 10 expands due to an increase in temperature at a temperature change of ΔT. Preferably, the cumulative increment of expansion is based on an acceptable assembly tolerance. The assembly tolerance refers to the error that may occur due to the assembly of the light guide plate 10 and the light-emitting component, which may be, for example, the sum of the possible length errors of the light guide plate 10 in the first direction X. Furthermore, the cumulative increment of expansion preferably does not exceed the acceptable assembly tolerance. The length of the first distance D1 is illustrated below with the light guide plate 10 with the parameters shown in Table 1.

[0063] Table 1

[0064] Coefficient of thermal expansion 5.00*10 -5 ]]> Temperature change (ΔT) 45℃(70℃-25℃) Allowable assembly tolerance 0.3 mm

[0065] When the length of the first distance D1 is short, the length of the segments in the light guide plate 10 is also short, therefore the cumulative increment of expansion is small. Based on the cumulative increment function of expansion:

[0066] The progressive increment of expansion = the thermal expansion coefficient * the temperature change (ΔT) * the length of the first distance D1

[0067] As calculated by the function, when the length of the first distance D1 is not greater than 133 mm, the progressive increment of expansion can not exceed the allowable assembly tolerance of 0.3 mm.

[0068] In some embodiments of the present application, for example, the allowable assembly tolerance between the light guide plate 10 and the plurality of light emitting components is ±0.3 mm, and the accommodation region 200 is an accommodation groove with an inner diameter of about 2 mm, which can accommodate a light emitting component with a size of about 1*1 mm. That is, even if the assembly tolerance of ±0.3 mm occurs, the light emitting component and the accommodation region 200 still have a gap and do not interfere with the inner wall of the accommodation groove, so that the deformation of the light guide plate 10 can be further avoided or reduced.

[0069] In preferred embodiments of the present application, the above function and the first length L1 can determine the number of the first cut-off portions 310. For example, when the light guide plate 10 with the parameters shown in Table 1 has a first length L1 of about 350 mm, at least two first cut-off portions 310 can be used to make the length of the segments less than 133 mm. In comparison, if no cut-off portion 300 is provided on the light guide plate, the progressive increment of expansion calculated according to the above function is about 0.78 mm, which is greater than the allowable assembly tolerance of 0.3 mm, and thus is unqualified. In summary, the cut-off portion 300 indeed helps to reduce the expansion of the light guide plate 10 and reduce the difference between the light guide plate 10 and the design value. The smaller expansion helps to improve and avoid the interference between the light guide plate 10 and other components, such as the light emitting component, the substrate, and the lamp plate.

[0070] The first cut-off portions 310 can all be provided in the light guide plate 10, or all extend to the edge of the light guide plate 10, or part of the first cut-off portions 310 extend to the edge of the light guide plate 10. As shown in Figure 1 , the plurality of first cut-off portions 310 can further include a second cut-off portion 320 and a third cut-off portion 330, and the length of the second cut-off portion 320 is greater than that of the third cut-off portion 330. In Figure 1 , the second cut-off portion 320 is provided in the light guide plate 10, and the third cut-off portion 330 extends to the edge of the light guide plate 10. The second cut-off portion 320 and the third cut-off portion 330 can be staggered as shown in Figure 1 , but are not limited thereto. Figure 1 Embodiments further include a plurality of third cut-off portions 330, which are respectively provided on opposite long edges of the light guide plate 10. In addition, in Figure 1 , the adjacent second cut-off portions 320 are also separated by a first distance D1. The length of the first distance D1 is as described above.

[0071] In some embodiments of the present application, the disconnection portion 300 can further comprise at least a fourth disconnection portion 340 extending along the first direction X. The fourth disconnection portion 340 can be arranged every first distance Dl in the second direction Y, but the present application is not limited thereto. As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto. Figure 1 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto. Figure 1 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto.

[0072] Figure 6 A top view of a light guide plate according to another embodiment of the present application. Figure 6 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto. Figure 6 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto. Figure 6 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto.

[0073] Figure 7 A top view of a light guide plate according to another embodiment of the present application. Figure 7 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto. Figure 7 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto.

[0074] Figure 8 A top view of a light guide plate according to another embodiment of the present application. Figure 8 As shown in FIG. 1C, the light guide plate 10 further comprises the fourth disconnection portion 340, wherein the opposite long sides of the light guide plate 10 are spaced apart from the fourth disconnection portion 340 by the first distance Dl. The length of the first distance Dl is as previously described. In some embodiments of the present application, the fourth disconnection portion 340 is arranged within the light guide plate 10 and passes through the second disconnection portion 320, but the present application is not limited thereto. Figure 8In one embodiment, the fifth disconnection portion 350 is disposed within the light guide plate 10, and the sixth disconnection portion 360 extends to the edge of the light guide plate 10, but is not limited thereto. The fifth disconnection portion 320 and the sixth disconnection portion 360 can be positioned as follows: Figure 8 The settings are shown in an alternating pattern, but are not limited to this.

[0075] exist Figure 8 In this embodiment, the fifth break portion 350 and the sixth break portion 360 partially overlap in the second direction Y. Preferably, the overlapping portion has a third length L3 in the first direction X. The third length L3 is preferably greater than one-third of the first length L1. For example, if the first length L1 is 350 mm, the third length L3 is, for example, greater than 123 mm. In this embodiment and other embodiments, even if the light guide plate 10d does not have a first break portion, the overlap between the fifth break portion 350 and the sixth break portion 360 can reduce the number of light guide lenses 100 connected within the light guide plate 10d, thereby helping to alleviate the degree of cumulative expansion.

[0076] The present invention also provides a backlight module. Figure 9 This is a cross-sectional schematic diagram of a backlight module according to an embodiment of the present invention, as shown below. Figure 9 As shown, the backlight module 1 includes a light guide plate 10 and a plurality of light-emitting components 50. The plurality of light-emitting components 50 are respectively disposed in a plurality of receiving areas 200 of the light guide plate 10, and each light-emitting component 50 has a gap G between it and each receiving area 200. The light guide plate 10 is only an example for the backlight module 1. That is to say, light guide plates other than the light guide plate 10, such as light guide plates 10b, 10c, and 10d, can also be used in the backlight module of this embodiment.

[0077] like Figure 9 As shown, the light-emitting component 50 has at least one light-emitting surface 550, and the receiving region 200 has at least one light-incident surface 250 facing the light-emitting surface 550. In several embodiments of the present invention, the light-emitting component 50 has five light-emitting surfaces 550 located on four sides and the top. In a preferred embodiment of the present invention, the light-emitting component 50 is, for example, a light-emitting diode (LED), and more preferably a sub-millimeter light-emitting diode (Mini LED).

[0078] like Figure 9 As shown, the backlight module 1 preferably includes a substrate 60 and a plurality of adhesive members 70. For example, the substrate 60 may be, for example, a flexible circuit board or a carrier board. A plurality of light-emitting components 50 are disposed on the substrate 60 and can be controlled to emit light by the substrate 60. A plurality of adhesive members 70 are disposed between the light guide plate 10 and the substrate 60 and connect the light guide plate 10 and the substrate 60. For example, the adhesive members 70 may be, for example, tape or adhesive.

[0079] Figure 10FIG. 2 is a top view of a backlight module according to an embodiment of the present application, wherein the adhesive 70 is shown in a perspective manner and the adhesive 70 can be a tape. Figure 11 FIG. 3 is a top view of a backlight module according to another embodiment of the present application, wherein the adhesive 70 is a dispensing adhesive. Figures 10-11 The position of the adhesive 70 is not limited to the above. In the preferred embodiment of the present application, the adhesive 70 can restrict the light guide plate 10 on the substrate 60, thus helping to restrict the expansion and contraction of the light guide plate 10. The adhesive 70 can also be disposed in cooperation with the position of the breakaway portion 300.

[0080] The backlight module 1, la according to the embodiments of the present application uses the light guide plate 10, and the expansion amount of the light guide plate 10 can be small due to the breakaway portion 300. Therefore, even if the substrate 60 and the light guide plate 10 provided with the light emitting component 50 can expand and contract to different degrees under temperature changes, the dimensional error between the substrate 60 and the light guide plate 10 due to expansion can be small. In this way, the relative position between the light emitting component 50 and the accommodating region 200 is less affected, thus avoiding or reducing the interference between the light emitting component 50 and the light guide plate 10.

[0081] The present application further tests the appearance change of the light guide plate 10 and the interference between the light emitting component 50 and the light guide plate 10 of the backlight module 1 under -40°C to 70°C. Based on the warping of the light guide plate 10 under -40°C to 70°C, the test results show that the breakaway portion 300 can avoid or improve the appearance change, such as deformation, of the light guide plate 10. Under -40°C to 70°C, the light emitting component 50 also does not fall off due to the interference of the light guide plate 10. In summary, the embodiments of the present application can maintain the integrity of the size of the light guide plate 10, thus helping to simplify the assembly of the backlight module 1. For example, the adhesion and assembly of the light guide plate 10 and the substrate 60 can be completed at one time. The embodiments of the present application also have the breakaway portion 300, thus the light guide plate 10 has the room for deformation and expansion, so that the expansion and contraction of the light guide plate 10 due to temperature changes can be small, thus the light guide plate 10 can remain flat, and the light emitting component 50 can be less likely to be interfered, collided or fallen off.

[0082] The embodiments of the present application are described above with reference to the drawings; however, the present application is not limited to the specific embodiments described above, but the specific embodiments described above are merely illustrative and not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A light guide plate, characterized in that, The light guide plate has a bottom surface and a light-emitting surface opposite to the bottom surface. The light guide plate is a plate with a complete size, and the light guide plate includes: Multiple light guide lenses are arranged along a first direction and a second direction to form a light guide lens array; wherein the first direction is perpendicular to the second direction, and the first direction and the second direction are parallel to the bottom surface and the light-emitting surface; Multiple receiving areas are respectively disposed in each of the plurality of light guide lenses for accommodating at least one light-emitting component; and Multiple disconnections are provided, each of which is located between multiple adjacent light guide lenses, and the multiple light guide lenses are arranged on both sides of each disconnection along the first direction or the second direction, and the disconnection is linear.

2. The light guide plate according to claim 1, characterized in that, The light guide plate has a first length in the first direction; the plurality of disconnected portions include a plurality of first disconnected portions, and each first disconnected portion extends along the second direction; wherein the plurality of light guide lenses are respectively arranged on both sides of the first disconnected portion along the second direction.

3. The light guide plate according to claim 2, characterized in that, The light guide plate has the first break portion at a first distance interval in the first direction, and the length of the first distance is calculated according to the following function: The cumulative increment of expansion = thermal expansion coefficient of the light guide plate * temperature change * length of the first distance The cumulative increment of expansion is the amount by which the light guide plate expands due to the increase in temperature under the temperature change, and the cumulative increment of expansion is less than or equal to an assembly tolerance.

4. The light guide plate according to claim 2, characterized in that, The plurality of first disconnections further include a second disconnection and a third disconnection, wherein the length of the second disconnection is greater than the length of the third disconnection; wherein the second disconnection is disposed within the light guide plate, and the third disconnection extends to the edge of the light guide plate.

5. The light guide plate according to claim 1, characterized in that, The light guide plate has a first length in the first direction and a second length in the second direction, and the first length is greater than the second length; the plurality of disconnections include at least one fourth disconnection, and each of the at least one fourth disconnection extends along the first direction; wherein the plurality of light guide lenses are respectively arranged on both sides of the fourth disconnection along the first direction.

6. The light guide plate according to claim 5, characterized in that, The light guide plate further has multiple fourth breaks, and the fourth breaks are provided at intervals of a first distance in the second direction; the length of the first distance is calculated according to the following function: The cumulative increment of expansion = thermal expansion coefficient of the light guide plate * temperature change * length of the first distance The cumulative increment of expansion is the amount by which the light guide plate expands due to the increase in temperature under the temperature change, and the cumulative increment of expansion is less than or equal to an assembly tolerance.

7. The light guide plate according to claim 6, characterized in that, The plurality of fourth disconnected portions further overlap in the second direction; the overlapping portion has a third length in the first direction, and the third length is greater than one-third of the first length.

8. The light guide plate according to claim 5, characterized in that, The at least one fourth break portion is disposed within the light guide plate, and the length of the at least one fourth break portion is greater than two-thirds of the length of the first break portion.

9. The light guide plate according to claim 5, characterized in that, The length of the at least one fourth break is less than half the length of the first break, and the at least one fourth break extends to the edge of the light guide plate.

10. The light guide plate according to claim 1, characterized in that, The plurality of receiving areas are more than a plurality of receiving slots, and each of the receiving slots has an opening located on the bottom surface of the light guide plate.

11. A backlight module, characterized in that, include: A light guide plate, the light guide plate having a bottom surface and a light emitting surface opposite to the bottom surface, the light guide plate being a plate of complete dimensions, and comprising: Multiple light guide lenses are arranged along a first direction and a second direction to form a light guide lens array; wherein the first direction is perpendicular to the second direction, and the first direction and the second direction are parallel to the bottom surface and the light-emitting surface; Multiple accommodating areas are respectively disposed in each of the multiple light guide lenses for accommodating at least one light-emitting component; Multiple disconnections, each of which is located between multiple adjacent light guide lenses, and the multiple light guide lenses are arranged along the first direction or the second direction on both sides of each disconnection, the disconnection being linear; and Multiple light-emitting components are respectively disposed in the multiple accommodating areas, wherein each light-emitting component has a gap with each accommodating area.

12. The backlight module according to claim 11, characterized in that, The light-emitting component has at least one light-emitting surface, and the receiving area has at least one light-incident surface facing the at least one light-emitting surface.

13. The backlight module according to claim 11, characterized in that, It further includes a substrate and a plurality of adhesive members, wherein the plurality of light-emitting components are disposed on the substrate, and the plurality of adhesive members are disposed between the light guide plate and the substrate and connect the light guide plate and the substrate.

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