TWM544025U - Backlight module and display device - Google Patents

Abstract

A backlight module is provided, including a housing, a frame, a light guiding plate, a printed circuit board, and a lighting member. The housing includes a bottom plate and a first wall connected to the bottom plate. The frame includes a top plate. The light guiding plate is disposed between the top plate and the bottom plate. The printed circuit board is disposed on the housing, and includes a first surface, a second surface, a first protrusion, and a second protrusion. The first surface and the second surface respectively face toward the light guiding plate and the first wall. The first protrusion and the second protrusion respectively protrude from the first surface and the second surface. The second protrusion is disposed between the top plate and the first wall.

Description

Backlight module and display device

This creation is about a backlight module. More specifically, the present invention relates to a backlight module including a printed circuit board having a T-shaped structure.

The Backlight Module (BLM) is one of the important components of the display device. Since the display panel (for example, the liquid crystal display panel) in the display device does not emit light by itself, it is necessary to project light through the light source of the backlight module to achieve the function of display.

Generally, when the backlight module is assembled, the housing and the frame are in direct contact, so that scraping is often caused by friction during handling or movement. When the scraping debris falls on a place where it is difficult to remove, it is easy to cause the assembly to be inaccurate or to scratch other components. Further, when the light guide plate assembly in the backlight module is warped, it must be pressurized to return it to its original shape. However, when the pressure is applied, the light guide plate may be caused to collide with the light-emitting element to cause damage of the light-emitting element.

In order to solve the above problems, the present invention provides a backlight module including a casing, a frame, a light guide plate, a printed circuit board, and a light-emitting element. The housing includes a bottom plate and a first side wall connecting the one of the bottom plates, and the frame body includes a top plate. The light guide plate is disposed between the top plate and the bottom plate. print The circuit board is disposed on the housing and includes a first surface, a second surface, a first protrusion, and a second protrusion, wherein the first surface and the second surface respectively face the light guide plate and the first sidewall And the first protrusion and the second protrusion respectively protrude from the first surface and the second surface. The second protrusion is further disposed between the top plate and the first side wall.

In an embodiment of the present invention, the first protruding portion has a first width, the light emitting element has a second width, and the first width is greater than the second width.

In an embodiment of the present invention, the first protruding portion is located between the top plate and the light emitting element.

In an embodiment of the present invention, the first protruding portion is aligned with the second protruding portion.

In an embodiment of the present invention, a portion of the first protruding portion is located between the top plate and the light guide plate.

In an embodiment of the present invention, a gap is formed between the first protruding portion and the light guide plate.

In an embodiment of the present invention, a portion of the first protruding portion is located between the light guide plate and the first surface.

In an embodiment of the present invention, the printed circuit board contacts the top plate.

In an embodiment of the present invention, the printed circuit board comprises aluminum, fiberglass, resin or rubber.

In an embodiment of the present invention, the printed circuit board is fixed on the first sidewall.

In an embodiment of the present invention, the frame further includes a second sidewall adjacent to the first sidewall, and the top panel extends from the second sidewall and is located at the second sidewall Above the first side wall.

In an embodiment of the present invention, the backlight module further includes a fixing component, and the printed circuit board is fixed on the first sidewall by the fixing component.

In an embodiment of the present invention, the backlight module further includes a cushion disposed between the top plate and the light guide plate and adjacent to the first protruding portion.

100‧‧‧shell

110‧‧‧floor

120‧‧‧First side wall

121‧‧‧ top surface

200‧‧‧ frame

210‧‧‧ top board

220‧‧‧second side wall

300‧‧‧Printed circuit board

310‧‧‧ Ontology

311‧‧‧ first side

312‧‧‧ second side

320‧‧‧First bulge

321‧‧‧End

330‧‧‧Second bulge

400‧‧‧Lighting elements

500‧‧‧Fixed components

600‧‧‧ cushion

700‧‧‧reflecting elements

800‧‧‧Light guide plate

900‧‧‧Optical diaphragm module

D‧‧‧ display panel

R‧‧‧ accommodating space

W1‧‧‧ first width

W2‧‧‧ second width

Fig. 1 is a view showing an exploded view of a backlight module according to an embodiment of the present invention.

Fig. 2 is a partial cross-sectional view showing the backlight module shown in Fig. 1.

Figure 3 is a schematic view showing a backlight module of another embodiment of the present invention.

Figure 4 is a schematic view showing a backlight module of another embodiment of the present invention.

Figure 5 is a schematic view showing a backlight module of another embodiment of the present invention.

Figure 6 is a schematic view showing a display device of an embodiment of the present invention.

The backlight module of the present embodiment will be described below. However, it will be readily appreciated that the present creative embodiment provides many suitable creative concepts and can be implemented in a wide variety of specific contexts. The specific embodiments disclosed are merely illustrative of the use of the present invention in a particular way, and are not intended to limit the scope of the present invention.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning meaning It will be understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the relevant art and the context or context of the present disclosure, and should not be in an idealized or overly formal manner. Interpretation, unless specifically defined herein.

Referring to FIG. 1 and FIG. 2, the backlight module of the present embodiment mainly includes a casing 100, a frame 200, a printed circuit board 300, at least one light-emitting component 400, a fixing component 500, and a cushion. 600, a reflective element 700, a light guide plate 800, and an optical film module 900. The housing 100 and the frame 200 can be combined to form an accommodating space R therebetween, the printed circuit board 300, the light-emitting element 400, the fixing component 500, the cushion 600, the reflective component 700, the light guide plate 800, and the optical device. The diaphragm module 900 can be accommodated in the accommodating space R. In addition, the optical film module 900 can include a plurality of optical films, the number of which depends on actual specifications.

Specifically, as shown in FIG. 2, the housing 100 has a bottom plate 110 and a first side wall 120 connecting the bottom plate 110, and the frame 200 has a top plate 210 and a second side wall 220, wherein the second side wall 220 is located. Outside the first sidewall 120, adjacent to and surrounding the first sidewall 120, and the aforementioned top plate 210 extends from the second sidewall 220 to above the first sidewall 120. The reflective element 700, the light guide plate 800 and the optical film module 900 are disposed between the bottom plate 110 and the top plate 210. The reflective element 700 is located between the bottom plate 110 and the light guide plate 800, and the light guide plate 800 is located between the reflective element 700 and the optical film module 900.

The printed circuit board 300 has a T-shaped structure including a body 310, a first protrusion 320 and a second protrusion 330. The body 310 has a first face 311 facing the light guide plate 800 and a second face 312 facing the first sidewall 120. The first protruding portion 320 and the second protruding portion 330 are coupled to the body 310 and protrude from the first surface 311 and the second surface 312, respectively. The light emitting element 400 is disposed on the first surface 311, and the fixing component 500 connects the second surface 312 and the first sidewall 120 to fix the printed circuit board 300 to the first sidewall 120 of the housing 100.

It should be noted that, in this embodiment, the first protruding portion 320 is located between the light emitting element 400 and the top plate 210, and the first width W1 of the first protruding portion 320 protruding from the first surface 311 is greater than The light emitting element 400 has a second width W2. Therefore, when the light guide plate 800 is warped due to stress and the user presses it back to the original state after the assembly of the light guide plate 800, the light guide plate 800 may only contact the end portion 321 of the first protruding portion 320 without touching or hitting. Since the light-emitting element 400 is used, damage of the light-emitting element 400 can be effectively avoided.

Furthermore, the second protruding portion 330 of the printed circuit board 300 is disposed between the top plate 210 and the first sidewall 120 and spaced apart from the first sidewall 120 by a distance. Therefore, in the process of transporting or assembling the backlight module, the top surface 121 of the first sidewall 120 rubs against the top plate 210 to generate scratches and shavings, thereby causing the assembly to be unstable.

In the present embodiment, the printed circuit board 300 may include a material that does not generate a filament when rubbed, such as aluminum, fiberglass, resin, or rubber, and may be formed in an extruded manner. The fixing component 500 can be, for example, a double-sided tape, a heat-dissipating glue, a solder or a screw, etc., that is, the printed circuit board 300 can be fixed to the first sidewall 120 by means of the fixing component 500 by adhesion, soldering, locking or plugging. Further, the light emitting element 400 may be, for example, a light emitting diode.

In some embodiments, the second protrusion 330 can also contact the top surface 121 of the first sidewall 120 to provide better support for the frame 200.

Referring to FIG. 2 , the cushion 600 has a soft material, is fixed on the top plate 210 and disposed between the top plate 210 and the light guide plate 800 , and between the first protrusion 320 and the optical film module 900 to avoid The light guide plate 800 collides with the top plate 210 to be damaged.

In the backlight module shown in FIGS. 1 and 2, in order to increase the area of the printed circuit board 300 in contact with the top plate 210 (to support the frame 200) and make it easy to manufacture, the first projection of the printed circuit board 300 The 320 and second projections 330 are the same thickness and aligned with each other. However, in some embodiments, the thickness and position of the first protrusion 320 and the second protrusion 330 can also be adjusted according to the needs of the user.

For example, as shown in FIG. 3, in another embodiment of the present invention, the first protruding portion 320 of the printed circuit board 300 may extend downward so that a portion of the printed circuit board 300 is located at the light guide plate 800 and the first Between faces 311. At this time, the thickness of the first protruding portion 320 is greater than the thickness of the second protruding portion 330 , and the end portion 321 of the first protruding portion 320 can directly contact the side surface of the light guide plate 800 . In this way, the light guide plate 800 will be blocked by the first protruding portion 320 during assembly without directly touching the light emitting element, thereby avoiding damage to the light emitting element 400, and avoiding too close to the light emitting element 400. The heat is applied to cause the light guide plate 800 to deform and warp.

Referring to FIG. 4 , in another embodiment of the present invention, the first protrusion 320 may extend toward the left such that a portion of the first protrusion 320 is located between the top plate 210 and the light guide plate 800 . It should be noted that, depending on the extended length of the first protrusion 320, the cushion 600 may be adjusted to the left to a position adjacent to the first protrusion 320 but not in contact therewith. In addition, a distance is also formed between the first protruding portion 320 and the light guide plate 800, that is, the first protruding portion 320 does not directly contact the light guide plate 800 to avoid friction and damage between the two.

In this embodiment, since the first projection 320 is shielded above the side of the light guide plate 800, it is also possible to prevent the light guide plate 800 from being warped upward when assembled.

As shown in FIG. 5, in another embodiment of the present invention, the cushion in the backlight module can be omitted, so that the first protrusion 320 extending between the top plate 210 and the light guide plate 800 can replace its function. In the present embodiment, the first protrusion 320 of the printed circuit board 300 may have a soft material.

Referring to FIG. 6 , the display device of the embodiment of the present invention may include a display panel D and a backlight module in any of the foregoing embodiments (the backlight module shown in FIG. 2 is taken as an example). The display panel D is disposed on the top plate 210 of the frame 200 and located in front of the light guide plate 800 , and the optical film module 900 is disposed between the display panel D and the light guide plate 800 .

In summary, the present invention provides a backlight module. By providing a T-shaped printed circuit board, the first protruding portion of the printed circuit board can be used to prevent the light-emitting element from being damaged by the light guide plate, and the printing can be utilized. The second protrusion of the circuit board avoids scraping due to friction between the housing and the frame, and the assembly rate of the backlight module can be greatly improved.

Although the embodiments of the present invention and its advantages have been disclosed as above, it should be understood that those skilled in the art can make changes, substitutions and refinements without departing from the spirit and scope of the present invention. In addition, the scope of protection of the present invention is not limited to the processes, machines, manufacturing, material compositions, devices, methods, and steps in the specific embodiments described in the specification, and any one of ordinary skill in the art may disclose the present disclosure. It is understood that the processes, machines, manufactures, compositions, devices, methods, and steps that are presently or in the future can be used in accordance with the present invention as long as they can perform substantially the same function or achieve substantially the same results in the embodiments described herein. Therefore, the scope of protection of the present invention includes the above processes, machines, manufacturing, material compositions, devices, methods and steps. In addition, each patent application scope constitutes an individual embodiment, and the scope of protection of the present invention also includes the combination of each patent application scope and embodiment.

Although the present invention has been disclosed above in the foregoing several preferred embodiments, it is not intended to limit the present invention. Those who have ordinary knowledge in the technical field of the present invention can make some changes and refinements without departing from the spirit and scope of the present creation. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application. In addition, each of the patent application scopes constitutes a separate embodiment, and the scope of the various patent applications and combinations of the embodiments are all within the scope of the present invention.

100‧‧‧shell

110‧‧‧floor

120‧‧‧First side wall

121‧‧‧ top surface

200‧‧‧ frame

210‧‧‧ top board

220‧‧‧second side wall

300‧‧‧Printed circuit board

310‧‧‧ Ontology

311‧‧‧ first side

312‧‧‧ second side

320‧‧‧First bulge

321‧‧‧End

330‧‧‧Second bulge

400‧‧‧Lighting elements

500‧‧‧Fixed components

600‧‧‧ cushion

700‧‧‧reflecting elements

800‧‧‧Light guide plate

900‧‧‧Optical diaphragm module

R‧‧‧ accommodating space

W1‧‧‧ first width

W2‧‧‧ second width

Claims (14)

A backlight module includes: a casing, a bottom plate and a first side wall, wherein the first side wall is connected to the bottom plate; a frame body includes a top plate; and a light guide plate is disposed between the bottom plate and the top plate a printed circuit board disposed on the housing, comprising: a first surface facing the light guide plate; a second surface facing the first sidewall; a first protruding portion protruding from the first surface And a second protruding portion protruding from the second surface and disposed between the top plate and the first sidewall; and a light emitting element disposed on the first surface. The backlight module of claim 1, wherein the first protrusion has a first width, the light emitting element has a second width, and the first width is greater than the second width. The backlight module of claim 1, wherein the first protrusion is located between the top plate and the light emitting element. The backlight module of claim 1, wherein the first protrusion is aligned with the second protrusion. The backlight module of claim 1, wherein a portion of the first protruding portion is located between the top plate and the light guide plate. The backlight module of claim 5, wherein a gap is formed between the first protrusion and the light guide plate. The backlight module of claim 1, wherein a portion of the first protrusion is located between the light guide plate and the first surface. The backlight module of claim 1, wherein the printed circuit board contacts the top plate. The backlight module of claim 1, wherein the printed circuit board comprises aluminum, fiberglass, resin or rubber. The backlight module of claim 1, wherein the printed circuit board is fixed to the first sidewall. The backlight module of claim 1, wherein the frame further comprises a second sidewall adjacent to the first sidewall, and the top panel extends from the second sidewall and is located above the first sidewall. The backlight module of claim 1, wherein the backlight module further comprises a fixing component, and the printed circuit board is fixed on the first sidewall by the fixing component. The backlight module of claim 1, wherein the backlight module further comprises a cushion disposed between the top plate and the light guide plate and adjacent to the first protruding portion. A display device, comprising: a backlight module according to any one of claims 1 to 13; and a display panel disposed on the frame and located in front of the light guide plate.