TW201809834A - Backlight module - Google Patents

Abstract

A backlight module includes a housing, a lighting curtain, a light source, and a diffusion plate. The housing includes a base plate and a side wall inclined relative to the base. The lighting curtain is disposed in the housing, and includes a central portion separated from the base plate, and an edge portion inclined relative to the central portion. The edge portion is connected to the side wall. The light source is disposed on the base plate, and located under the central portion. The diffusion plate is located on the lighting curtain, and separated from the central portion. The edge of the diffusion plate is connected to the side wall.

Description

Backlight module

The invention mainly relates to a backlight module, in particular to a backlight module for a display device.

The backlight module is used to provide a light source for the display device. However, in recent years, display devices have gradually developed toward thinness. In order to achieve the ultra-thin effect, the edges of the display device casing may be inclined. However, for the bottom-mounted LED backlight module, when the edge of the housing is formed with a bevel, the brightness of the display panel is darker, resulting in uneven brightness of the display panel, which further makes the edge of the display panel unusable, thus reducing the display screen. size.

However, although the current backlight module meets the purpose of its use, it has not yet met many other requirements. Therefore, there is a need to provide improved solutions for backlight modules.

In order to solve the defects of the above-mentioned conventional technologies, the object of the present invention is to provide a backlight module that can increase the brightness of the edge of the diffuser plate and make the brightness of the overall diffuser plate more uniform.

The invention provides a backlight module, which includes a housing, a light-transmitting plate, a light source, and a diffusion plate. The casing includes a base plate and a side wall inclined with respect to the base plate. The light-transmitting plate is arranged in the casing and includes the substrate and the substrate A central portion of the partition and an edge portion inclined with respect to the central portion, an angle between the central portion and the edge portion is greater than 90 degrees, wherein the edge portion is connected to the side wall. The light source is disposed on the substrate, and is located below the central portion. The diffusion plate is located above the light-transmitting plate and is spaced from the central portion, wherein the edge of the diffusion plate is connected to the side wall.

In one embodiment, the backlight module further includes a central spacing element connected to the substrate and the central portion; and an edge spacing element connected to the substrate and the boundary between the central portion and the edge portion.

In one embodiment, the shortest distance between the light source and the side wall is greater than the shortest distance between the edge spacer and the side wall.

In one embodiment, there is a first maximum distance between the side wall and the edge portion, there is a first minimum distance between the side wall and the edge portion, the first minimum distance is less than the first maximum distance, and the The included angle is between 100 degrees and 170 degrees.

In an embodiment, there is a second maximum distance between the diffuser plate and the edge portion, and there is a second minimum distance between the diffuser plate and the edge portion, and the second minimum distance is smaller than the second maximum distance.

In an embodiment, the substrate is substantially parallel to the central portion, and the diffusion plate is substantially parallel to the central portion.

In one embodiment, a lower air layer is formed between the housing and the light-transmitting plate, and an upper air layer is formed between the light-transmitting plate and the diffuser plate, and the light-transmitting plate has a plurality of through holes that communicate with the The upper air layer and the lower air layer.

In one embodiment, the housing further includes a reflective layer disposed on the substrate and the side wall, wherein a light beam generated by the light source is reflected by the reflective layer on the side wall, and then passes through the edge portion and the diffusion plate.

The invention provides a backlight module, which includes a casing, a light-transmitting plate, a plurality of central spacing elements, a plurality of edge spacing elements, a plurality of light sources, and a diffusion plate. The casing includes a base plate and a side wall inclined with respect to the base plate. The transparent plate is located in the housing and includes a central portion spaced apart from the substrate and an edge portion inclined relative to the central portion, and an angle between the central portion and the edge portion is greater than 90 degrees, wherein the edge portion Connected to the side wall.

A plurality of central spacing elements are respectively connected to the substrate and the central portion. A plurality of edge spacing elements are respectively connected to the substrate and the boundary between the central portion and the edge portion. A plurality of light sources are arranged on the substrate, and are located below the central portion. The diffusion plate is located above the light-transmitting plate and is spaced from the central portion, wherein the edge of the diffusion plate is connected to the side wall.

In summary, the backlight module of the present invention utilizes the inclined edge portion to allow the light irradiated to the inclined sidewall of the housing to be reflected to the light-transmitting plate and exit through the edge of the diffusion plate, thereby increasing the brightness of the edge of the diffusion plate , Making the brightness of the whole diffuser plate more uniform.

1‧‧‧Backlight module

10‧‧‧Housing

11‧‧‧ substrate

12‧‧‧Side wall

121‧‧‧Bevel

13‧‧‧Reflective layer

20‧‧‧Light source

30‧‧‧light board

31‧‧‧Central Department

32‧‧‧Edge

33‧‧‧Through hole

40‧‧‧Diffusion plate

41‧‧‧Luminous surface

50‧‧‧Central spacer

60‧‧‧Edge spacer

A1‧‧‧Display device

A10‧‧‧Display module

A11‧‧‧Display panel

A20‧‧‧Housing

A21‧‧‧Side board

A22‧‧‧Backboard

E1, E2 ‧‧‧ included angle

E3, E4 ‧‧‧ acute angle

L1, L2‧‧‧Light

P1‧‧‧reference plane

S1‧‧‧accommodation space

S11‧‧‧Lower air layer

S12‧‧‧ Upper air layer

FIG. 1A is a front view of the display device of the present invention.

FIG. 1B is a side view of the display device of the present invention.

FIG. 2 is a perspective view of the backlight module of the present invention.

FIG. 3 is an exploded view of the backlight module of the present invention.

FIG. 4 is a top view of the backlight module of the present invention.

FIG. 5 is a cross-sectional view of section AA of FIG. 4.

Figure 6 is an enlarged view of Figure 5.

The following description provides many different embodiments, or examples, for implementing different features of the present invention. The elements and arrangements described in the following specific examples are only used to express the invention in a simplified manner, and they are only used as examples and are not intended to limit the invention. For example, the description of the structure of the first feature on or above a second feature includes direct contact between the first and second features, or the placement of another feature between the first and second features, so that the first The first and second features are not in direct contact.

The spatially related terms used above, such as above or below, are only used to briefly describe the relationship between an element or a feature on the drawing relative to another element or feature. In addition to the orientation described in the drawings, it includes devices used or operated in different orientations. The shape, size, thickness, and angle of inclination in the drawings may not be drawn to scale or simplified for the purpose of clarity, and are provided for illustrative purposes only.

FIG. 1A is a front view of the display device A1 of the present invention. FIG. 1B is a side view of the display device A1 of the present invention. The display device A1 includes a display module A10 and a housing A20. The display module A10 is disposed in the housing A20. The display module A10 includes a display panel A11 exposed from the housing A20. The housing A20 includes a side plate A21 and a back plate A22. The side panel A21 is inclined with respect to the back panel A22 and the display panel A11. In this embodiment, there is an acute angle between the side panel A21 and the display panel A11, and an angle between the side panel A21 and the back panel A22.

FIG. 2 is a perspective view of the backlight module 1 of the present invention, and the diffusion plate 40 is not drawn in the second figure. FIG. 3 is an exploded view of the backlight module 1 of the present invention. FIG. 4 is a top view of the backlight module 1 of the present invention. Figure 5 is a cross-section of section AA of Figure 4 view. Figure 6 is an enlarged view of Figure 5. The display module A10 further includes a backlight module 1 disposed on the display panel A11 and between the display panel A11 and the back plate A22. The backlight module 1 is used to provide light to the display panel A11.

The backlight module 1 includes a casing 10, a plurality of light sources 20, a lighting curtain 30, and a diffusion plate 40. The housing 10 may be a thin shell-like structure, and may be made of metal or rigid plastic.

The housing 10 includes a substrate 11, a side wall 12, and a reflective layer 13. The substrate 11 may be a thin plate-like structure, and extends along a reference plane P1 (as shown in FIG. 6). The side wall 12 is connected to the edge of the substrate 11 and is inclined with respect to the substrate 11. The side wall 12 may be an annular structure surrounding the substrate 11. Therefore, the substrate 11 and the side wall 12 form an accommodating space S1.

In this embodiment, the side wall 12 is a sheet-like structure, and an angle E1 is included between the side wall 12 and the substrate 11. The included angle E1 is about 100 degrees to 170 degrees. The side wall 12 may have a slope 121 (as shown in FIG. 6). The inclined surface 121 can be a flat surface or a curved surface.

The reflective layer 13 is disposed on the substrate 11 and the side wall 12 and is located in the accommodating space S1. The reflective layer 13 can be a film attached to the substrate 11 and the sidewall 12. In other words, the reflective layer 13 extends along the substrate 11 and the sidewall 12.

The light sources 20 are arranged on the substrate 11 in an array, and are located in the accommodation space S1. In this embodiment, the light source 20 is a light-emitting diode to generate light.

The light-transmitting plate 30 is disposed in the housing 10 and located in the accommodating space S1. The transparent plate 30 is used to reflect the light generated by the light source 20. A lower air layer S11 is formed between the housing 10 and the light-transmitting plate 30. The light-transmitting plate 30 has a central portion 31 and an edge portion 32. The light generated by the light source 20 can be passed by the light-transmitting plate 30 in the lower air layer S11 And the reflection layer 13 of the housing 10 reflects or totally reflects, so the light can be conducted in the lower air layer S11. In other words, light can be conducted from the light source 20 on the central portion 31 to the lower air layer S11 between the side wall 12 and the edge portion 32.

The light-transmitting plate 30 may have a laminar structure. The central portion 31 and the edge portion 32 may be made of the same material, and the central portion 31 and the edge portion 32 are formed integrally or separately.

In this embodiment, the central portion 31 can be a thin plate-like structure. The central portion 31 is parallel or substantially parallel to the substrate 11 and is spaced apart from the substrate 11. In addition, the light source 20 is provided below the central portion 31.

The edge portion 32 is inclined with respect to the central portion 31, and the edge portion 32 is connected to the side wall 12. In this embodiment, the edge portion 32 is in contact with the connection between the side wall 12 and the diffusion plate 40. Since the edge of the edge portion 32 is sandwiched between the side wall 12 and the diffusion plate 40, when the display device A1 vibrates due to factors such as the speaker inside the display device A1, the edge portion 32 does not interact with the side wall 12 or due to resonance It is the collision between the diffusion plates 40 that generates noise.

The edge portion 32 may be an annular structure, surrounding the central portion 31. The edge portion 32 may extend along a plane or along a curved surface.

In this embodiment, there is an angle E2 between the edge portion 32 and the central portion 31. The included angle E2 is greater than 90 degrees or between 100 degrees and 170 degrees. In addition, there is an acute angle E3 between the edge portion 32 and the side wall 12. The aforementioned acute angle E3 is approximately between 20 degrees and 60 degrees. In other words, the distance between the side wall 12 and the edge portion 32 gradually narrows toward the junction of the side wall 12 and the edge portion 32.

There is a first maximum distance between the side wall 12 and the edge 32, and there is a first minimum distance between the side wall 12 and the edge 32, the first minimum distance is less than the first The maximum distance is at least three times. There is a second maximum distance between the diffusion plate 40 and the edge portion 32, and there is a second minimum distance between the diffusion plate 40 and the edge portion 32, and the second minimum distance is at least three times smaller than the second maximum distance.

There is an acute angle E4 between the edge portion 32 and the diffusion plate 40. The aforementioned acute angle E4 is approximately between 20 degrees and 60 degrees. In other words, the distance between the diffusion plate 40 and the edge portion 32 gradually narrows toward the junction of the diffusion plate 40 and the side wall 12.

In this embodiment, the light-transmitting plate 30 is made of an opaque material. The light-transmitting plate 30 has a plurality of through holes 33 distributed in the central portion 31 and the edge portion 32. Therefore, the light generated by the light source 20 can also pass through the light-transmitting plate 30 through the through-hole 33.

The diffusion plate 40 is located above the light-transmitting plate 30 and is spaced apart from the central portion 31. The diffusion plate 40 is used to diffuse light. The diffusion plate 40 may be a thin plate-like structure, and the diffusion plate 40 may extend along a plane parallel to the reference plane P1. In other words, the diffusion plate 40 is parallel or substantially parallel to the central portion 31, and the diffusion plate 40 is parallel or substantially parallel to the substrate 11.

The edge of the diffusion plate 40 is connected to the side wall 12. In this embodiment, the edge of the diffusion plate 40 is fixed on the top of the side wall 12. An upper air layer S12 is formed between the light-transmitting plate 30 and the diffusion plate 40. The through hole 33 of the light-transmitting plate 30 communicates with the upper air layer S12 and the lower air layer S11. As shown in FIG. 5, the light L1 generated by the light source 20 can be conducted in the lower air layer S11. After the light L1 passing through the through hole 33 enters the upper air layer S12, it passes through the diffusion plate 40 and is emitted through the light emitting surface 41. The light-emitting surface 41 faces the display panel A11 of the display module A10.

In this embodiment, the light-transmitting plate 30 has flexibility. In order to maintain the distance between the light-transmitting plate 30 and the housing 10, a central spacer 50 and an edge spacer 60 are provided on the substrate 11. The central spacer 50 is connected to the substrate 11 and the central part 31. In this embodiment, the bottom end of the central spacer 50 is fixed to the substrate 11, and the top of the central spacer 50 is fixed to the central portion 31.

As shown in FIG. 5, the bottom end of the central spacer 50 passes through the substrate 11 and the reflective layer 13, and buckles the two opposing surfaces of the substrate 11 and the reflective layer 13. In addition, the top end of the central spacing element 50 passes through the light-transmitting plate 30 and buckles two opposite surfaces of the light-transmitting plate 30.

The structure of the edge spacer 60 may be the same as the structure of the center spacer 50. The edge spacer 60 is connected to the substrate 11 and the boundary between the central portion 31 and the edge portion 32. In this embodiment, the bottom end of the edge spacer 60 is fixed to the substrate 11, and the top end of the edge spacer 60 is fixed to the boundary between the central portion 31 and the edge 32. Since the edge spacer 60 is connected to the substrate 11 and the boundary between the central portion 31 and the edge portion 32, when the display device A1 vibrates due to factors such as the speaker inside the display device A1, the edge portion 32 does not interact with the side wall 12 due to resonance Or the collision between the diffusion plates 40 may cause noise.

As shown in FIG. 4, the central spacer elements 50 are arranged in an array, and the edge spacer elements 60 are arranged around the central spacer element 50. In other words, the edge spacer 60 is closer to the side wall 12 than the center spacer 50. As shown in FIG. 5, the shortest distance between the light source 20 and the side wall 12 is greater than the shortest distance between the edge spacer 60 and the side wall 12. The shortest distance between the central spacer 50 and the side wall 12 is greater than the shortest distance between the light source 20 and the side wall 12.

As shown in FIG. 3, in this embodiment, when the light-transmitting plate 30 is not disposed in the backlight module 1, the central portion 31 and the edge portion 32 of the light-transmitting plate 30 both extend along a plane. After the light-transmitting plate 30 is disposed in the housing 10 and the light-transmitting plate 30 is fixed to the central spacing element 50 and the edge spacing element 60, the edge portion 32 abuts the top of the side wall 12 End, the edge portion 32 is bent relative to the central portion 31 by the edge spacer 60. In this way, the edge portion 32 can be easily inclined with respect to the central portion 31. In addition, since the light-transmitting plate 30 is bent by the edge spacer 60 and the side wall 12, the edge portion 32 is approximately curved.

With the structure of the backlight module 1 described above, as shown in FIG. 5, the light L2 generated by the light source 20 can be conducted in the lower air layer S11, and the light L2 entering between the side wall 12 and the edge portion 32 can pass through the side wall 12 The upper reflection layer 13 reflects through the through hole 33 of the edge portion 32, and can be emitted through the diffusion plate 40 above the edge portion 32, thereby increasing the brightness of the edge of the diffusion plate 40 and making the brightness of the overall diffusion plate 40 more uniform . Therefore, the size of the screen displayed on the display panel A11 is increased.

Although the present invention has been disclosed in various embodiments as above, it is only for reference and not for limiting the scope of the present invention. Anyone who is familiar with this skill can make some changes without departing from the spirit and scope of the present invention. With retouch. Therefore, the above-mentioned embodiments are not intended to limit the scope of the present invention, and the scope of protection of the present invention shall be deemed as defined by the scope of the attached patent application.

1‧‧‧Backlight module

10‧‧‧Housing

11‧‧‧ substrate

12‧‧‧Side wall

13‧‧‧Reflective layer

20‧‧‧Light source

30‧‧‧light board

31‧‧‧Central Department

32‧‧‧Edge

40‧‧‧Diffusion plate

41‧‧‧Luminous surface

50‧‧‧Central spacer

60‧‧‧Edge spacer

S1‧‧‧accommodation space

S11‧‧‧Lower air layer

S12‧‧‧ Upper air layer

Claims (10)

A backlight module includes: a housing including a substrate and a side wall inclined relative to the substrate; a light-transmitting plate disposed in the housing and including a central portion spaced apart from the substrate and relative to the central portion An inclined edge portion, an angle between the central portion and the edge portion is greater than 90 degrees, wherein the edge portion is connected to the side wall; a light source is disposed on the substrate and is located below the central portion; and a The diffusion plate is located above the light-transmitting plate and is spaced from the central portion, wherein the edge of the diffusion plate is connected to the side wall. The backlight module as described in item 1 of the patent application scope further includes: a central spacer element connected to the substrate and the central portion; and an edge spacer element connected to the substrate and the central portion and the edge portion Junction. The backlight module as described in item 2 of the patent application range, wherein the shortest distance between the light source and the side wall is greater than the shortest distance between the edge spacer and the side wall. The backlight module as described in item 1 of the patent application scope, wherein the side wall and the edge portion have a first maximum distance, and the side wall and the edge portion have a first minimum distance, the first minimum distance Less than the first maximum distance, and the included angle is between 100 degrees and 170 degrees. The backlight module as described in item 1 or 4 of the patent application scope, in which There is a second maximum distance between the diffusion plate and the edge portion, and there is a second minimum distance between the diffusion plate and the edge portion, and the second minimum distance is smaller than the second maximum distance. The backlight module as described in item 1 of the patent application scope, wherein the substrate is substantially parallel to the central portion, and the diffusion plate is substantially parallel to the central portion. The backlight module according to item 1 of the patent application scope, wherein a lower air layer is formed between the housing and the light-transmitting plate, and an upper air layer is formed between the light-transmitting plate and the diffuser plate, and the light-transmitting plate There are a plurality of through-holes that communicate with the upper air layer and the lower air layer. The backlight module as described in item 1 of the patent application scope, wherein the housing further includes a reflective layer disposed on the substrate and the side wall, wherein a light beam generated by the light source is reflected by the reflective layer on the side wall and passes through Across the edge and the diffuser. A backlight module includes: a housing including a substrate and a side wall inclined relative to the substrate; a light-transmitting plate located in the housing and including a central portion spaced apart from the substrate and inclined relative to the central portion An edge portion, an angle between the central portion and the edge portion is greater than 90 degrees, wherein the edge portion is connected to the side wall; a plurality of central spacing elements are respectively connected to the substrate and the central portion; and a plurality of edges The spacing elements are respectively connected to the substrate and the boundary between the central portion and the edge portion; A plurality of light sources are disposed on the substrate and below the central portion; and a diffusion plate is located above the light-transmitting plate and is spaced apart from the central portion, wherein the edge of the diffusion plate is connected to the side wall. The backlight module as described in item 9 of the patent application range, wherein the shortest distance between the light sources and the side wall is greater than the shortest distance between the edge spacing elements and the side wall.