TWI485486B - Backlight module assembly and display device using the same - Google Patents

Description

Backlight module assembly and display device using same

The present invention relates to a backlight module assembly.

As shown in FIG. 4, Chinese Patent Publication No. CN101753928 discloses a flat-panel television 100. The base 104 of the flat-panel TV 100 is fixed on the back cover 108 of the liquid crystal screen 102, so that the support plate 106 supports the liquid crystal screen 102, and then uses the rear. The base, and with screws, secures the base 104 between the back cover 108 of the screen 102 and the rear case. However, this design requires additional use of the support plate 106 having a specific curvature and strength and the back cover 108 to provide a supporting effect, making the overall support structure more complicated, difficult to assemble, and resulting in high manufacturing cost. In addition, in order to provide the locking space and strength, the back cover 108 must have a certain thickness, resulting in a product that is not easily thinned and heavy.

Other conventional designs such as Chinese Patent Publication No. CN101753932 disclose a liquid crystal display television comprising a face shell, a back cover, a base, a liquid crystal screen, a main board and a hardware. The liquid crystal screen is fixed on the surface shell through a screw hole and a hardware, and the base is transparent. The hardware is fixed by a display panel composed of a face shell, a back cover, a liquid crystal panel and a main board.

The invention provides a back with lower manufacturing cost and simplified assembly procedure Optical module and display device.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. An embodiment of the present invention provides a display device including a display panel, a backlight module assembly, and a frame for achieving one or a portion of the above or other objects. The backlight module assembly includes a backlight module and a base. The backlight module is disposed on one side of the display panel to serve as a light source of the display panel. The backlight module comprises a light guide plate, a heat sink, a light bar and a back plate. The heat dissipating member is disposed at a position adjacent to the light incident side of the light guide plate, and the light bar is attached to a side of the heat sink surface on the light incident side of the light guide plate, and the back plate is adapted to receive the heat dissipating member, the light bar and the light guide plate. The frame limits the display panel and the backlight module. The base and the heat sink fix the back plate to support the backlight module and the display panel.

Another embodiment of the present invention provides a backlight module assembly including a light guide plate, a heat sink, a light bar, a back plate, and a base. The heat dissipating member is disposed at a position adjacent to the light incident side of the light guide plate, and the light bar is attached to a side of the heat sink surface on the light incident side of the light guide plate, and the back plate is adapted to receive the heat dissipating member, the light bar and the light guide plate. The base and the heat sink fix the back plate to support the backlight module.

In an embodiment, the heat sink may be an aluminum extruded structure.

In one embodiment, the heat sink comprises a first portion and a second portion disposed at an angle to each other, the light bar is fixed to the first portion and the base is fixed to the second portion.

In an embodiment, the back plate further has a recessed portion, and the heat dissipation member is disposed in the recessed portion.

In an embodiment, the second portion of the heat sink may be formed with a plurality of screw holes.

In an embodiment, the first portion of the heat sink may be a stamped structure.

In one embodiment, the first portion of the heat sink comprises an elongated block and two diagonal blocks symmetrically disposed on opposite sides of the elongated block.

In an embodiment, a bent portion is formed on each side of the light bar, and each bent portion is stacked on an oblique block.

In one embodiment, the light bar includes at least one light source and a substrate, and the light source is disposed on at least one of the bent portions.

In an embodiment, the second portion of the heat sink forms a corresponding recess at the corresponding elongated block and the oblique block.

In an embodiment, the back plate can be sandwiched between the base and the heat sink.

In one embodiment, a fixing member locks the base, the back plate and the heat sink.

In an embodiment, the fixing member comprises a screw.

In one embodiment, the backlight module further includes an optical film group, and the optical film group is located on one side of the light guide plate.

In summary, the embodiment of the present invention has at least one of the following advantages: by the design of each of the above embodiments, the heat sink can simultaneously provide a fixed light bar and a fixed base and hold the back plate together with the base to support the backlight mode. The effect of the group and the display panel (when used in a display device having a display panel) can be omitted, so that the conventional support plate member can be omitted, the assembly process can be simplified, the manufacturing cost can be reduced, and the thickness of the back plate can be reduced to achieve thinness. Shaped effect, and Still retain a certain special strength.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. The above and other objects, features, and advantages of the invention will be apparent from

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a display device according to an embodiment of the present invention, and Fig. 2 is an enlarged cross-sectional view taken along line A-A' of Fig. 1. The backing plate 28 is omitted from FIG. 1 to show the relative position of the base 16 to the heat sink 22. Referring to FIG. 1 and FIG. 2 , the display device 10 has a display panel 12 (not shown in FIG. 1 ), a backlight module 14 , and a display panel 12 and a backlight. A frame 18 of the module 14. The backlight module 14 is disposed on one side of the display panel 12 as a light source of the display panel 12 , and a base 16 and a heat sink 22 of the backlight module 14 fix the back plate 28 to support the backlight module 14 and the display panel 12 .

As shown in FIG. 2, the backlight module 14 includes a heat sink 22 and a light guide plate. 24. A light bar 26 and a backing plate 28. A recessed portion 28a is disposed at an end of the backing plate 28 adjacent to the light incident side of the light guide plate 24. The heat dissipating member 22 is disposed in the recessed portion 28a and adjacent to the light incident side 24a of the light guide plate 24. The recessed portion 28a has a depth d. The depth d is substantially equal to the thickness of the heat sink 22 such that the inner surface of the back plate 28 is flush with the surface of the heat sink 22 to stably carry the light guide plate 24. The light bar 26 is attached to one side of the heat sink 22 facing the light guide plate 24, and the light guide plate 24 is adapted to guide a light beam emitted by the light bar 26. The back plate 28 can be disposed between the base 16 and the heat sink 22, and at least one fixing member 32 can pass through the heat sink 22, the back plate 28 and the base 16 to lock the base 16 to the heat sink 22 and the back plate 28. That is, the base 16 and the heat sink 22 fix the back plate 28 to provide the effect of supporting the backlight module 14 and the display panel 12, wherein the base 16 and the backlight module 14 form a backlight module assembly 20. The type of the fixing member 32 is not limited, and may be, for example, a screw.

In an embodiment, the backlight module 14 further includes an optical film set 35 and a reflective sheet 37. The optical film set 35 is disposed on one side of the light guide plate 24 (ie, the side of the light exit surface of the light guide plate) and is located at The light guide plate 24 is disposed between the light guide plate 24 and the display panel 12, and the reflection sheet 37 is disposed between the light guide plate 24 and the back plate 28.

FIG. 3 is a schematic view of the heat sink 22 and the base 16 according to an embodiment of the present invention, and some of the components are omitted to clearly show the structure of the heat sink 22. Referring to FIG. 3, in an embodiment, the heat sink 22 can include a first portion 22a and a second portion 22b disposed at an angle to each other. The light bar 26 is attached and fixed to the first portion 22a, and the second portion 22b. Can be accommodated in the recess 28a of the back plate 28 and the base 16 The back plate 28 and the second portion 22b are locked (please refer to FIG. 2 and FIG. 3 at the same time). The light bar 26 includes a light source 26a and a substrate 26b on which the light source 26a is mounted. The light source 26a is, for example, a light emitting diode (LED), and the substrate 26b is, for example, a circuit board. 3 shows that the first portion 22a of the heat sink 22 can be a stamped structure formed by stamping, and the first portion 22a can be substantially perpendicular to the second portion 22b, for example. The heat sink 22 can be, for example, an aluminum extruded structure but is not limited. In an embodiment, the first portion 22a of the heat dissipating member 22 may include an elongated block P and two oblique blocks Q symmetrically disposed on opposite sides of the elongated block P, and the two sides of the light bar 26 are respectively formed correspondingly. A bent portion R, and each of the bent portions R is superposed on an oblique block Q. In an embodiment, the light source 26a is disposed on the bent portion R of the light bar 26 (only one light source 26a is disposed on a bent portion R in FIG. 3, but the invention is not limited thereto), in other embodiments. The central portion E of the light bar 26 can also be provided with a light source. The second portion 22b may form slots 22c corresponding to the elongated block P and the oblique block Q to provide a space for the light source to dissipate heat. Furthermore, the second portion 22b of the heat dissipating member 22 can form a plurality of screw holes 34 through which a plurality of fixing members 32, such as screws, can be passed through the base 16, the back plate 28 and the heat sink 22 to provide a locking effect. .

With the design of the above embodiment, the heat sink 22 can simultaneously provide the fixed light bar 26 and the fixed base 16 and fix the back plate 28 together with the base 16 to support the backlight module 14 and the display panel 12 (when used for having the display panel 12) The effect of the display device can be omitted, so that the conventional support plate member can be omitted, the assembly process can be simplified, the manufacturing cost can be reduced, and the thickness of the back plate can be reduced. To the effect of thinning, but still retain a certain characteristic strength.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention. In addition, the terms "first", "second" and the like mentioned in the specification or the patent application are used to name the elements only, and are not intended to limit the upper or lower limit of the number of elements.

10‧‧‧ display device

12‧‧‧ display panel

14‧‧‧Backlight module

16‧‧‧Base

18‧‧‧ frame

20‧‧‧Backlight module assembly

22‧‧‧ Heat sink

22a‧‧‧The first part of the heat sink

22b‧‧‧The second part of the heat sink

22c‧‧‧ Groove

24‧‧‧Light guide

24a‧‧‧light side

26‧‧‧Light strips

26a‧‧‧Light source

26b‧‧‧Substrate

28‧‧‧ Backplane

28a‧‧‧Depression

32‧‧‧Fixed parts

34‧‧‧ screw holes

35‧‧‧Optical diaphragm group

37‧‧‧reflector

100‧‧‧ flat screen TV

102‧‧‧LCD screen

104‧‧‧Base

106‧‧‧Support board

108‧‧‧Back cover

D‧‧‧depth

P‧‧‧Long block

Q‧‧‧ oblique block

R‧‧‧Bend

E‧‧‧Central Department

FIG. 1 is a schematic diagram of a display device according to an embodiment of the present invention.

Figure 2 is an enlarged cross-sectional view taken along line A-A' of Figure 1

3 is a schematic view of a heat sink and a base according to an embodiment of the invention.

4 is a schematic diagram of a conventional flat panel television.

16‧‧‧Base

20‧‧‧Backlight module assembly

22‧‧‧ Heat sink

24‧‧‧Light guide

24a‧‧‧light side

26‧‧‧Light strips

28‧‧‧ Backplane

28a‧‧‧Depression

32‧‧‧Fixed parts

12‧‧‧ display panel

18‧‧‧ frame

35‧‧‧Optical diaphragm group

37‧‧‧reflector

D‧‧‧depth

Claims (23)

A display device includes: a display panel; a backlight module assembly including a backlight module and a base, the backlight module being disposed on one side of the display panel as a light source of the display panel, the backlight module The method includes: a light guide plate; a heat dissipating member disposed adjacent to a light incident side of the light guide plate; a light bar attached to a side of the heat sink member facing the light incident side of the light guide plate, wherein the heat sink member a first portion and a second portion disposed at an angle to each other, the light bar is fixed to the first portion and the base is fixed to the second portion; and a back plate is adapted to receive the heat sink and the lamp And a light guide plate, wherein the back plate has a recessed portion, and the heat dissipating member is disposed in the recessed portion; the base, the heat sink is fixed to the back plate to support the backlight module and the display panel; and a frame body Limiting the display panel and the backlight module. The display device of claim 1, wherein the heat sink is an aluminum extruded structure. The display device of claim 1, wherein the second portion of the heat sink is formed with a plurality of screw holes. The display device according to claim 1, wherein the heat dissipation The first portion of the piece is a stamped structure. The display device of claim 1, wherein the first portion of the heat dissipating member comprises an elongated block and two diagonal blocks symmetrically disposed on opposite sides of the elongated block. The display device of claim 5, wherein the two sides of the light bar respectively form a bent portion, and each of the bent portions is superposed on the oblique block. The display device of claim 6, wherein the light bar comprises at least one light source and a substrate, the light source being disposed on the bent portion of at least one of the light strips. The display device of claim 7, wherein the second portion of the heat dissipating member forms a corresponding recess at the corresponding elongated block and the oblique block. The display device of claim 1, wherein the back plate is sandwiched between the base and the heat sink. The display device of claim 1, further comprising: at least one fixing member, the base, the back plate and the heat dissipating member are locked. The display device of claim 10, wherein the fixing member comprises a screw. The display device of claim 1, wherein the backlight module further comprises an optical film set, the optical film set being located between the light guide plate and the display panel. A backlight module assembly includes: a light guide plate; a heat dissipating member disposed adjacent to a light incident side of the light guide plate; and a light bar attached to the heat sink member facing the light incident side of the light guide plate a back plate adapted to receive the heat sink, the light bar and the light guide plate, and a base, the base plate being fixed together with the heat sink to support the backlight module, wherein the heat sink comprises an angled arrangement A first portion and a second portion are fixed to the first portion and the base is fixed to the second portion. The back plate has a recessed portion, and the heat dissipating member is disposed in the four trap portions. The backlight module assembly of claim 13, wherein the heat sink is an aluminum extruded structure. The backlight module assembly of claim 13, wherein the second portion of the heat sink is formed with a plurality of screw holes. The backlight module assembly of claim 13, wherein the first portion of the heat sink is a stamped structure. The backlight module assembly of claim 13, wherein the first portion of the heat dissipating member comprises an elongated block and two diagonal blocks symmetrically disposed on opposite sides of the elongated block. The backlight module assembly of claim 17, wherein the two sides of the light bar respectively form a bent portion, and each of the bent portions is superposed on the oblique block. The backlight module assembly of claim 18, wherein the light bar comprises at least one light source and a substrate, and the light source is disposed on the bent portion of at least one of the light strips. The backlight module assembly of claim 19, wherein the second portion of the heat dissipating member forms a corresponding recess at the corresponding elongated block and the oblique block. The backlight module assembly of claim 13, wherein the back plate is sandwiched between the base and the heat sink. The backlight module assembly of claim 13, further comprising: at least one fixing member, the base, the back plate and the heat dissipating member are locked. The backlight module assembly of claim 13, further comprising an optical film set disposed on one side of the light guide plate.