Backlight module and display device

Abstract

The present disclosure relates to a backlight module and a display device. The display device includes a display panel and a backlight module. The backlight module is arranged corresponding to the display panel and includes a back plate, a gap element and an optical element. The gap element passes through the back plate and includes a base, a support portion, a positioning portion and a first protrusion. The base has a first surface and a second surface opposite to the first surface. The support portion is arranged on the first surface. The positioning portion is arranged on the second surface. The first protrusion is arranged on the second surface, and the first protrusion is located at the periphery of the positioning portion. The first protrusion has a third surface away from the second surface, and the third surface is parallel to the second surface. The optical element is arranged on the gap element; wherein a portion of the back plate is located between the base and a portion of the positioning portion.

Description

[0001] This application was filed on November 20, 2017, with application number "201711160169.3" and the name of the invention is "Backlight Divisional application for a Chinese invention patent application entitled "Module and display device" Technical Field

[0002] The present disclosure relates to a backlight module and a display device, and more particularly to a direct-type backlight module and a display device having the direct-type backlight module. Background Art

[0003] With the advancement of technology, flat panel display devices, such as liquid crystal display devices, have been widely used in various fields. Due to their superior characteristics such as light weight, low power consumption and no radiation, they have gradually replaced traditional cathode ray tube display devices and are applied to many types of electronic products, such as mobile phones, portable multimedia devices, notebook computers, LCD TVs and LCD monitors, etc.

[0004] The liquid crystal display device mainly includes a display panel and a backlight module. The backlight module can emit light to pass through the display panel so that the display panel can display images. In a direct-type backlight module, an optical film is arranged above the back plate, and a light source is arranged between the back plate and the optical film. The light emitted by the light source can be evenly diffused to the optical film and directed toward the display panel. In addition, in order to maintain a certain distance between the optical film and the back plate, a plurality of support members are arranged on the back plate to support the optical film.

[0005] In the prior art, the structure of the support is designed according to the thickness of the back plate, so back plates of different thicknesses will have support members of different specifications, which cannot be shared with each other. For example, the thickness of the back plate commonly used is 0.6mm, 0.8mm and 1.0mm, so three different support members must be designed to suit back plates of different thicknesses. This will increase the cost of mold development, and the material management and inventory costs of the three different support members will also increase. Summary of the invention

[0006] The present disclosure provides a display device, including a display panel and a backlight module. The backlight module is arranged corresponding to the display panel and includes a back plate, a gap element and an optical element. The gap element passes through the back plate and includes a base, a support portion, a positioning portion and a first protrusion. The base has a first surface and a second surface opposite to the first surface. The support portion is arranged on the first surface. The positioning portion is arranged on the second surface. The first protrusion is arranged on the second surface, and the first protrusion is located at the periphery of the positioning portion. The first protrusion has a third surface away from the second surface, and the third surface is parallel to the second surface. The optical element is arranged on the gap element; wherein a portion of the back plate is located between the base and a portion of the positioning portion.

[0007] The present disclosure also proposes a display device, including a display panel and a backlight module, the backlight module is arranged corresponding to the display panel, and includes a back plate, a gap element and an optical element. The gap element passes through the back plate, and includes a base, a support portion, a positioning portion, a first protrusion and a second protrusion. The base has a first surface and a second surface opposite to the first surface. The support portion is arranged on the first surface. The positioning portion is arranged on the second surface. The first protrusion is arranged on the second surface, and the first protrusion has a third surface away from the second surface, wherein the third surface has a first distance relative to the second surface. The second protrusion is arranged on the second surface, the first protrusion is located between the positioning portion and the second protrusion, and the second protrusion has a fourth surface away from the second surface, wherein the fourth surface has a second distance relative to the second surface, and the second distance is smaller than the first distance. The optical element is arranged on the gap element; wherein a portion of the back plate is located between the base and a portion of the positioning portion.

[0008] The present disclosure further proposes a backlight module, comprising a back plate, a gap element and an optical element. The gap element passes through the back plate, and the gap element comprises a base, a support portion, a positioning portion and a first protrusion. The base has a first surface and a second surface opposite to the first surface. The support portion is disposed on the first surface. The positioning portion is disposed on the second surface. The first protrusion is disposed on the second surface, and the first protrusion is located at the periphery of the positioning portion, and the first protrusion has a third surface away from the second surface, wherein the third surface is parallel to the second surface. The optical element is disposed on the gap element; wherein a portion of the back plate is located between the base and a portion of the positioning portion.

[0009] As described above, in the backlight module and display device of the present invention, the supporting portion of the gap element is arranged on the first surface of the base, the positioning portion is arranged on the second surface of the base, the first protrusion is arranged on the second surface of the base and is located at the periphery of the positioning portion, and the first protrusion has a third surface away from the second surface, wherein the third surface is parallel to the second surface, the optical element is arranged on the gap element, and a portion of the back panel is located between the base and a portion of the positioning portion. The structural design allows the present invention to achieve assembly positioning and supporting functions by matching the same gap element with back panels of different thicknesses, thereby saving the mold development cost, material management and inventory cost of the gap element. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein:

[0011] Figure 1 The figure is a cross-sectional schematic diagram of a backlight module according to an embodiment of the present disclosure.

[0012] Figure 2Aand Figure 2B They are respectively a three-dimensional schematic diagram and a cross-sectional schematic diagram of a gap element according to an embodiment of the present disclosure.

[0013] Figure 3A and Figure 3B They are respectively a three-dimensional schematic diagram and a cross-sectional schematic diagram of a gap element according to another embodiment of the present disclosure.

[0014] Figure 3C for Figure 3B A partially enlarged schematic diagram of .

[0015] Figures 3D to 3G They are respectively a stereoscopic schematic diagram and a cross-sectional schematic diagram of gap elements according to different embodiments of the present disclosure.

[0016] Figure 3H and Fig. 3I They are schematic diagrams of the first protrusion in different implementation aspects of the present disclosure.

[0017] Figure 4A , Figure 5A and Fig. 6A They are schematic diagrams of connection between a gap element and back plates of different thicknesses according to an embodiment of the present disclosure.

[0018] Figure 4B , Figure 5B and Figure 6B They are Figure 4A , Figure 5A and Fig. 6A Schematic diagram of a top view of the back plate.

[0019] Figure 7 It is a schematic diagram of a display device according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0020] The backlight module and the display device according to some embodiments of the present disclosure will be described below with reference to the relevant drawings, wherein the same elements will be described with the same reference symbols.

[0021] Figure 1 FIG. 1 is a cross-sectional schematic diagram of a backlight module 1 according to an embodiment of the present disclosure. Figure 1 As shown, the backlight module 1 of this embodiment is a straight backlight module and may include a back plate 11, at least one spacer element 13 and an optical element 12. In addition, the backlight module 1 of this embodiment may further include at least one light source 14, at least one light-transmitting element 15 and a reflective element 16.

[0022] The back plate 11 has a first side T1 and a second side T2, and the first side T1 and the second side T2 are opposite sides of the back plate 11. Here, the first side T1 can be referred to as the inner side of the back plate 11, and the second side T2 can be referred to as the outer side of the back plate 11. The back plate 11 can be used to accommodate components of the backlight module 1 and provide protection against collision, electromagnetic waves, electric shock or moisture. The material of the back plate 11 can be selected from plastic, metal, alloy, polyester, carbon fiber, or a combination thereof, without limitation.

[0023] The optical element 12 is disposed on the back plate 11. The number of optical elements 12 may be multiple (for example, 3 or 4), such as but not limited to a diffuser, a light collecting sheet, a brightness enhancement film, or an optical film with other functions. Among them, the optical element 12 closest to the gap element 13 may be, for example, a diffuser. The light source 14 is disposed on the back plate 11, and can emit light toward the optical element 12. In some embodiments, the light source 14 may have a plurality of light-emitting elements 141, and, for example, are arranged in a two-dimensional array on a substrate 142. The light-transmitting element 15 may be a lens, and is disposed corresponding to the light-emitting element 141. Among them, the light-transmitting element 15 may be disposed on the light-emitting element 141, and the light-emitting element 141 may include a light-emitting diode, which can emit light through the light-transmitting element 15, and then pass through the optical element 12 and emit. The reflective element 16 is disposed on the back plate 11, and can reflect the light directed to the back plate 11 upward to the optical element 12, thereby improving the light utilization rate. The reflective element 16 may be a reflective layer (e.g., a metal coating) or a reflective sheet. Here, the reflective element 16 is taken as an example of a reflective sheet. The reflective element 16 has a reflective material, and the reflective material may include, for example, metal, metal oxide, high reflective paint (white paint), or a combination thereof, without limitation.

[0024] The interstitial element 13 passes through the back plate 11 and is partially located between the back plate 11 and the optical element 12. In some embodiments, there may be a plurality of interstitial elements 13, which are respectively disposed on the back plate 11 to support the optical element 12. Here, the optical element 12 is "disposed on" the interstitial element 13, which means that the optical element 12 is located above the interstitial element 13, and the interstitial element 13 may include direct contact, indirect contact, or no contact with the optical element 12.

[0025] Please refer to Figure 1 And cooperate Figure 2A and Figure 2B , in order to explain in detail the structure of the gap element of an embodiment. Figure 2A and Figure 2B 1 and 2 are schematic diagrams of a three-dimensional view and a cross-sectional view of a gap element 13 according to an embodiment of the present disclosure. It should be noted that the gap element 13 may be integrally formed or may be composed of different components, and its material may include plastic or metal. The gap element 13 of this embodiment is an example of integrally formed, and the material is plastic, and is, for example, plastic injection molded.

[0026] like Figure 2A and Figure 2B As shown, the gap element 13 of this embodiment has a base portion 131 , a supporting portion 132 , a positioning portion 133 and a first protruding portion 134 .

[0027] The base portion 131 has a first surface S1 and a second surface S2 opposite to the first surface S1. Here, the first surface S1 is an upper surface, and the second surface S2 is a lower surface. In some embodiments, the peripheral shape of the base portion 131 may be, for example, circular, arc-shaped, polygonal, wavy, serrated, or irregular. The peripheral shape of the base portion 131 of the present embodiment is a circle as an example. When the gap element 13 is installed on the back plate 11, the positioning portion 133 of the gap element 13 is passed through the hole of the back plate 11 and then rotated by an angle (for example, 90 degrees).

[0028] The support portion 132 is disposed on the first surface S1 of the base portion 131 and may or may not contact the optical element 12, while the back plate 11 may or may not contact the second surface S2 of the base portion 131, and the positioning portion 133 is disposed on the second surface S2 of the base portion 131. When the installation is completed, the base portion 131 and the support portion 132 are located on the first side T1 of the back plate 11, and the positioning portion 133 is located on the second side T2 of the back plate 11, and the optical element 12 is disposed on the support portion 132 (please cooperate with Figure 1 ). Here, part of the back plate 11 may be located between the base portion 131 and part of the positioning portion 133. The positioning portion 133 of this embodiment may include a head component 1331 and two positioning posts 1332. The head component 1331 is disposed on the second surface S2, and the two positioning posts 1332 are disposed and connected to opposite sides of the head component 1331, and extend from both sides of the head component 1331 in the direction parallel to the direction D1. In other embodiments of the present disclosure, the number of positioning posts 1332 is not limited, and the positioning posts 1332 may be single or multiple.

[0029] The first protrusion 134 is disposed on the second surface S2 of the base portion 131 and is located around the positioning portion 133. In some embodiments, the first protrusion 134 is centered on the positioning portion 133 and forms a circular, arc-shaped, polygonal, or irregular profile around the positioning portion 133. Figure 2AAs shown, the first protrusion 134 of the present embodiment is arranged around the head component 1331. Here, the first protrusion 134 is taken as an example to form a disc shape around the positioning portion 133 with the positioning portion 133 as the center. The first protrusion 134 has a third surface S3 away from the second surface S2, the third surface S3 is parallel to the second surface S2, and the third surface S3 has a first distance h1 relative to the second surface S2. In some embodiments, the first distance h1 may be, for example, greater than or equal to 0.1 mm and less than or equal to 20 mm (0.1mm≦h1≦20mm). In addition, in some embodiments, the maximum width d1 of the first protrusion 134 along the direction D1 may be, for example, 8 mm. The above figures are just examples, and the sizes of the gap elements of backlight modules or display devices of different sizes may be different, depending on the design requirements.

[0030] In addition, the gap element 13 further has at least one rib 137, and the rib 137 connects the first surface S1 of the base portion 131 and the support portion 132. In this embodiment, there are two ribs 137, which are respectively connected to the base portion 131 and the two sides of the support portion 132. The purpose of providing the rib 137 is not only to strengthen the structural strength of the gap element 13, but also to facilitate the rotation and force application when the gap element 13 is installed on the back plate 11, making installation easier.

[0031] Also, please refer to FIG. 3A to FIG. 3C As shown, Figure 3A and Figure 3B are respectively a three-dimensional schematic diagram and a cross-sectional schematic diagram of a gap element 13a according to another embodiment of the present disclosure, and Figure 3C for Figure 3B A partially enlarged schematic diagram of .

[0032] and Figure 2A and Figure 2B The main difference between the gap element 13 of the present embodiment is that the gap element 13a of the present embodiment has a second protrusion 135 in addition to the base portion 131, the support portion 132, the positioning portion 133 and the first protrusion 134. The second protrusion 135 is disposed on the second surface S2 of the base portion 131 and is adjacent to the first protrusion 134, and the first protrusion 134 is located between the second protrusion 135 and the positioning portion 133. In some embodiments, the second protrusion 135 is also centered on the positioning portion 133 and surrounds the positioning portion 133 to form a circular, arc-shaped, polygonal, or irregular profile. FIG. 3A to FIG. 3C As shown, the first protrusion 134 and the second protrusion 135 of this embodiment are centered on the positioning portion 133 and are formed into a disc shape around the positioning portion 133. The second protrusion 13 is on the outside, and the first protrusion 134 is on the inside.

[0033] The second protrusion 135 has a fourth surface S4 away from the second surface S2, and the fourth surface S3 has a second distance h2 relative to the second surface S2, wherein the second distance h2 is less than the first distance h1. Here, the first protrusion 134 and the second protrusion 135 of different step differences (distances or heights) can form a stepped structure. In some embodiments, the second distance h2 may be, for example, greater than or equal to 0.1 mm, and less than or equal to 20 mm (0.1mm≦h2≦20mm). In addition, in some embodiments, the difference between the first distance h1 and the second distance h2 may be greater than or equal to 0.01 mm, and less than or equal to 10 mm (0.01mm≦(h1-h2)≦10mm). In this embodiment, the difference between the first distance h1 and the second distance h2 may be, for example, 0.2 mm. In addition, the fourth surface S4 of this embodiment is parallel to the second surface S2.

[0034] In some embodiments, the maximum width d2 of the second protrusion 135 along the direction D1 may be, for example, 11 mm (d2>d1), the maximum width of the base portion 131 along the direction D1 may be, for example, 20 mm, and the height of the support portion 132 along the direction D2 may be, for example, 20 mm. The above figures are only examples, and the sizes of the gap elements of backlight modules or display devices of different sizes may be different, depending on design requirements.

[0035] Also, please refer to Figures 3D to 3G As shown, they are respectively a stereoscopic schematic diagram and a cross-sectional schematic diagram of the gap elements 13b and 13c of different embodiments of the present disclosure.

[0036] like Figure 3D and Figure 3E As shown, Figure 2A and Figure 2B The main difference between the gap element 13a and the gap element 13b is that the first protrusion 134 of the gap element 13b is continuously arranged around the periphery of the positioning member 133 to form an annular structure, so that there is a gap between the first protrusion 134 of the gap element 13b and the positioning member 133.

[0037] In addition, if Figure 3F and Figure 3G As shown, Figure 3A and Figure 3B The main difference of the gap element 13a is that the first protrusion 134 and the second protrusion 135 of the gap element 13a are continuously arranged around the periphery of the positioning member 133 to form two annular structures, with the second protrusion 135 on the outside and the first protrusion 135 on the inside, so that there is a gap between the first protrusion 134 and the positioning member 133, and there is also a gap between the second protrusion 135 and the first protrusion 135.

[0038] In addition, Figure 3E and Figure 3GIn the embodiment of the present invention, the maximum width d3 of the first protrusion 134 along the direction D1 and the maximum width d4 of the second protrusion 135 along the direction D1 may be respectively the same as the above Figure 2A and Figure 3A The widths d1 and d2 are the same, and the specific values ​​can refer to the above. Of course, the values ​​of d3 and d4 can also be different from the above d1 and d2, respectively, and the present disclosure does not limit this.

[0039] In addition, other features of the gap elements 13b and 13c may refer to the same elements of the gap element 13 or 13a, and will not be further described herein.

[0040] The shapes of the first protrusion 134 and the second protrusion 135 are just examples. In different implementations, the shapes of the first protrusion 134 and the second protrusion 135 may also be different from the above figures. Figure 3H and Fig. 3I They are schematic diagrams of the first protrusions of different embodiments of the present disclosure. Figure 3H In the embodiment, the first protrusion 134a is a discontinuous structure and is composed of a plurality of arc-shaped segments (with a gap between two arc-shaped segments); or, Fig. 3I In the embodiment, the first protrusion 134b is composed of a plurality of fan-shaped sections (there is a gap between two fan-shaped sections). Of course, in different embodiments, the second protrusion may also have a structure similar to the first protrusion.

[0041] In addition, the spacer element of the present invention can be applied to back plates of different thicknesses. The following description will be made using the spacer element 13a being applied to back plates of different thicknesses.

[0042] Figure 4A , Figure 5A and Fig. 6A 1 and 11 are schematic diagrams of connection between the gap element 13a and the back plates 11a, 11b, 11c of different thicknesses according to an embodiment, and Figure 4B , Figure 5B and Figure 6B They are Figure 4A , Figure 5A and Fig. 6A A schematic top view of the back plates 11a, 11b, and 11c. Figure 4B , Figure 5A and Fig. 6A The back plates 11 a , 11 b , 11 c are viewed from the inner side (first side T1 ) of the back plates 11 a , 11 b , 11 c .

[0043] like Figure 4A and Figure 4BAs shown, the thickness D of the back plate 11a along the direction D2 of the present embodiment is, for example, 1.0 mm. Since the gap element 13a is installed on the back plate 11a, the gap element 13a passes through the back plate 11a downward from the first side T1 of the back plate 11a, the back plate 11a needs to have a hole O1 corresponding to the gap element 13a. In the present embodiment, Figure 4A and 4B As shown, the hole O1 has an aperture w1, wherein the aperture w1 is the minimum aperture of the hole O1. In addition, the second protrusion 135 has a second width d2, wherein the second width d1 is the maximum width of the second protrusion 135, and the aperture w1 must be greater than or equal to the second width (d2), so that the second protrusion 135 (and the first protrusion 134, the positioning portion 133) can pass through the hole O1 of the back plate 11a. In addition, the hole O1 of the present embodiment can also be used for the two positioning posts 1332 of the positioning portion 133 to pass through. When the second protrusion 135, the first protrusion 134 and the positioning portion 133 pass through the hole O1 of the back plate 11a, the extension direction of the two positioning posts 1332 is parallel to the direction D3. Therefore, the gap element 13a needs to be rotated, for example, 90 degrees, so that the extension direction of the positioning posts 1332 can be parallel to the direction D1, and then one end of the two positioning posts 1332 can be clamped at the extension of the hole on both sides of the hole O1 (here it can be regarded as the positioning hole H), so that a part of the back plate 11a is located between the second surface S2 and a part of the positioning portion 133, so that the gap element 13a can be positioned and fixed on the back plate 11a. Here, Figure 4A As shown, the back plate 11 a contacts the second surface S2 of the base portion 131 , and may or may not contact the second protrusion 135 .

[0044] In addition, if Figure 5A and Figure 5B As shown, the thickness D of the back plate 11b along the direction D2 of the present embodiment is smaller than that of the back plate 11a, for example, it can be 0.8 mm. The back plate 11b can include a hole O2, and the hole O2 has an aperture w2. Similarly, when the gap element 13a is installed on the back plate 11b, the gap element 13a needs to pass through the back plate 11b first. Therefore, Figure 5B As shown, the hole diameter w2 of the hole O2 of this embodiment is greater than or equal to the maximum width d1 of the first protrusion 134, so that the first protrusion 134 (and the positioning portion 133) can pass through the hole O2 of the back plate 11b. However, the hole diameter w2 needs to be smaller than the second width d2 of the second protrusion 135, so that a portion of the back plate 11b can contact the fourth surface S4 and be located between the fourth surface S4 of the second protrusion 135 and part of the positioning portion 133, and the gap element 13a can be positioned and fixed on the back plate 11b.

[0045] In addition, the back plate 11b further includes two positioning holes H, and the two positioning holes H are adjacent to opposite sides of the hole O2. When the first positioning portion 134 (and the positioning portion 133) pass through the hole O2 of the back plate 11b, the extension direction of the two positioning posts 1332 is parallel to the direction D3. Therefore, the gap element 13a needs to be rotated, for example, by 90 degrees, so that the extension direction of the two positioning posts 1332 can extend along the direction D1, and then one end of the two positioning posts 1332 can be clamped in the positioning holes H on both sides of the back plate 11b (the positioning holes H are correspondingly arranged with one end of the positioning posts 1332), so that the gap element 13a can be positioned and fixed on the back plate 11b. Here, the shape of the positioning hole H is not limited, for example, it can be circular, arc-shaped, polygonal or irregular, as long as one end of the positioning post 1332 can be correspondingly located in the positioning hole H, so that the gap element 13a can be positioned and fixed.

[0046] In addition, the hole O2 of the back plate 11b can be used to allow the two positioning posts 1332 of the positioning portion 133 to pass through, wherein the hole O2 can define a long axis direction D4 (parallel to the direction D3), and the extension of the line connecting the two positioning holes H can define a line segment direction D5 (parallel to the direction D1), and the long axis direction D4 and the line segment direction D5 are staggered and not parallel to each other, and the two can contain an angle, such as 90 degrees. In addition, if Figure 5A As shown, the back plate 11 b contacts the fourth surface S4 of the second protrusion 135 , and may or may not contact the first protrusion 134 .

[0047] In the back plate 11b of the present embodiment, the hole O2 is not connected to the positioning hole H. The structure between the two can increase the contact area between the gap element 13a and the back plate 11b, and increase the stability of the gap element 13a fixed to the back plate 11b. Figure 5A In the embodiment, since the back plate 11b contacts the second protrusion 135, there will be a gap between the second surface S2 of the base 131 and the back plate 11b, and foreign matter (such as dust) will easily enter into the gap. Therefore, the back plate 11b of this embodiment may also have a convex portion 112 protruding toward the base 131 direction (direction D2), the convex portion 112 may be adjacent to the hole O2, and the convex portion 112 and the base 131 may at least partially overlap (may partially or completely overlap), so that the convex portion 112 can contact the second surface S2. The protruding height d of the convex portion 112 of this embodiment may be, for example, 0.2 mm. The convex portion 112 may be a full circle, or have multiple sections, and is not limited. The purpose of providing the convex portion 112 on the back plate 11b is not only to prevent foreign matter from entering the gap between the two (a full circle is required), but also to increase the contact area between the gap element 13a and the back plate 11b, and to increase the stability of the connection (a full circle or not is acceptable).

[0048] In addition, if Fig. 6A and Figure 6BAs shown, the thickness D of the back plate 11c along the direction D2 of the present embodiment is smaller than that of the back plate 11b and the back plate 11a, for example, 0.6 mm. Similarly, when the gap element 13a is installed on the back plate 11c, it needs to pass through the back plate 11c first. Figure 6B As shown, the hole diameter w3 of the hole O3 of the back plate 11c must be greater than or equal to the maximum width (not shown) of the positioning portion 133 along the direction D1, so that the positioning portion 133 can pass through the hole O3. However, the hole diameter w3 of the back plate 11c must be smaller than the maximum width d1 of the first protrusion 134, and the hole diameter w3 must also be smaller than the maximum width d2 of the second protrusion 135, and a portion of the back plate 11c is located between the third surface S3 of the first protrusion 134 and a portion of the positioning portion 133, and also between the fourth surface S4 of the second protrusion 135 and a portion of the positioning portion 133.

[0049] In addition, when the positioning portion 133 passes through the hole O3 of the back plate 11c, the extension direction of the two positioning columns 1332 is parallel to the direction D3. Therefore, the gap element 13a also needs to be rotated, for example, 90 degrees, so that the extension direction of the two positioning columns 1332 can extend along the direction D1, and then one end of the two positioning columns 1332 can be respectively clamped in the positioning holes H on both sides of the back plate 11c, so that the gap element 13a can be positioned and fixed on the back plate 11c.

[0050] Here, if Fig. 6A As shown, the back plate 11c contacts the third surface S3 of the first protrusion 134 and may or may not contact the positioning portion 133. In the back plate 11c, the hole O3 is not connected to the positioning hole H. The structure between the two can increase the contact area between the gap element 13a and the back plate 11c, and increase the stability of the gap element 13a fixed to the back plate 11c. Fig. 6A In the embodiment, since the back plate 11c contacts the first protrusion 134, there is also a gap between the second surface S2 of the base 131 and the back plate 11c (the gap is larger than that of the back plate 11b). Therefore, the back plate 11c of this embodiment also has a protrusion 112 protruding toward the base 131 direction (direction D2), and the protrusion 112 and the base 131 at least partially overlap (may partially or completely overlap), so that the protrusion 112 can contact the second surface S2. The protrusion height d of the protrusion 112 of this embodiment can be, for example, 0.4 mm.

[0051] It is particularly noted that in the above three embodiments of the back plates 11a, 11b, 11c, the gap element 13a passes through the positions of the holes O1, O2, O3 of the back plates 11a, 11b, 11c and is fixed on the back plates 11a, 11b, 11c respectively, and the widths of the holes O1, O2, O3 of the back plates with different thicknesses are different. Specifically, the back plates 11a, 11b, 11c with different thicknesses have different hole widths, such as Figure 4B , Figure 5B and Figure 6B As shown, the apertures w1, w2, and w3 of the gap elements 13a passing through the back plates 11a, 11b, and 11c are different, and the aperture w1> the aperture w2> the aperture w3. In other words, the thicker the back plate, the larger the width of the gap element 13a passing through the hole. In addition, Figure 4B The hole O1, Figure 5B The broken hole O2 and Figure 6B The shape of the opening O3 is only an example and is not limited thereto. In different embodiments, the shapes of the openings O1, O2, and O3 may also be different.

[0052] In addition, after the gap element 13a passes through the above-mentioned back plates 11a, 11b, 11c, it is positioned using the positioning holes H of the back plates 11a, 11b, 11c. In different embodiments, different structures can also be used for positioning. For example, a recess (not shown) can be set at the position of the back plates 11a, 11b, 11c corresponding to one end of the two positioning columns 1332, so that one end of the two positioning columns 1332 can be respectively clamped in the recess to position the gap element 13a; or, corresponding rough structures can be set on the back plates 11a, 11b, 11c to increase the friction between one end of the two positioning columns 1332 and the back plates 11a, 11b, 11c for positioning, and the present disclosure is not limited to this.

[0053] In addition, the above-mentioned gap elements 13a and 13c are taken as examples having two protrusion structures (protrusions 134 and 135). In different embodiments, in addition to the first protrusion 134 and the second protrusion 135, the gap element may also have a third protrusion (or more, not shown), and the second protrusion 135 may be located between the third protrusion and the first protrusion 134. In addition, the distance between the third protrusion and the second surface S2 may be smaller than the second distance h2 of the second protrusion 135 to be suitable for more back panels with different thicknesses.

[0054] In addition, the above-mentioned gap element 13a is described as being applicable to back plates of three different thicknesses, and the gap elements 13, 13b, and 13c can also be applicable to back plates of at least two different thicknesses. The details can be referred to the content of the gap element 13a, which will not be repeated here.

[0055] Please refer to Figure 7 As shown, it is a schematic diagram of a display device 2 according to an embodiment of the present disclosure.

[0056] The display device 2 includes a display panel 3 and a backlight module 4. The display panel 3 and the backlight module 4 are arranged opposite to each other. When the light E emitted by the backlight module 4 passes through the display panel 3, the color can be displayed through each pixel of the display panel 3 to form an image. The display panel 3 of this embodiment is, for example but not limited to, a liquid crystal display panel, and the backlight module 4 can be the above-mentioned backlight module 1 or its variation. The specific technical content can be referred to above and will not be further described.

[0057] In summary, in the backlight module and display device disclosed in the present invention, the supporting portion of the gap element is arranged on the first surface of the base, the positioning portion is arranged on the second surface of the base, the first protrusion is arranged on the second surface of the base and is located at the periphery of the positioning portion, and the first protrusion has a third surface away from the second surface, wherein the third surface is parallel to the second surface, the optical element is arranged on the gap element, and a portion of the back panel is located between the base and a portion of the positioning portion. The structural design allows the present invention to achieve assembly positioning and supporting functions by matching the same gap element with back panels of different thicknesses, thereby saving the mold development cost, material management and inventory cost of the gap element.

[0058] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A display device, characterized in that: include: a display panel; as well as A backlight module, arranged corresponding to the display panel, comprising: A back plate including a hole and a positioning hole; A gap element comprising: A base portion having a first surface and a second surface opposite to the first surface; a supporting portion, located on the first surface; a positioning portion, located on the second surface, and comprising a head component and a positioning post located on the side of the head component, after at least part of the head component passes through the hole, the gap element is rotated so that the positioning post is arranged corresponding to the positioning hole; wherein the base portion is located between the support portion and the positioning portion; a first protrusion located on the second surface, and the first protrusion is located at a periphery of the positioning portion; and an optical element disposed on the interstitial element; Part of the back plate is located between the base and part of the positioning portion.

2. The display device according to claim 1, wherein: The broken hole is not connected to the positioning hole.

3. The display device according to claim 1, wherein: The back plate has another positioning hole, the hole can define a long axis direction, the extension of the line connecting the positioning hole and the other positioning hole can define a line segment direction, and the long axis direction and the line segment direction form an angle.

4. The display device according to claim 1, wherein: The positioning portion includes another positioning post located at another side surface of the head component opposite to the positioning post.

5. The display device according to claim 1, wherein: The positioning hole is arc-shaped.

6. A method for assembling a display device, characterized in that: include: providing a display panel; as well as A backlight module is provided, which is arranged corresponding to the display panel, including: A back plate including a hole and a positioning hole; A gap element comprising: A base portion having a first surface and a second surface opposite to the first surface; a supporting portion, located on the first surface; a positioning portion, located on the second surface, and comprising a head component and a positioning post located on a side of the head component; wherein the base portion is located between the support portion and the positioning portion; and a first protrusion located on the second surface, and the first protrusion is located at a periphery of the positioning portion; and an optical element disposed on the interstitial element; After the positioning portion passes through the hole, the gap element is rotated so that the positioning column and the positioning hole are arranged correspondingly, and part of the back plate is located between the base and part of the positioning portion.

7. The assembly method according to claim 6, characterized in that: The broken hole is not connected to the positioning hole.

8. The assembly method according to claim 6, characterized in that: The back plate has another positioning hole, the hole can define a long axis direction, the extension of the line connecting the positioning hole and the other positioning hole can define a line segment direction, and the long axis direction and the line segment direction form an angle.

9. The assembly method according to claim 6, characterized in that: The positioning portion includes another positioning post located at another side surface of the head component opposite to the positioning post.

10. The assembly method according to claim 6, characterized in that: The positioning hole is arc-shaped.

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