TWI468805B - Backlight module and light device thereof - Google Patents

Description

Backlight module and light source device thereof

The invention relates to a light source device, in particular to a backlight module and a light source device thereof.

The backlight module can be classified into two types according to the setting position of the light source device: a direct type backlight module and a side shot type backlight module. Generally, the backlight module mainly includes a light guide plate, an optical film, a reflector, and a light source device. Wherein, the light source device can be mainly composed of a reflector and a light-emitting component. The reflector is disposed outside the light emitting assembly to effectively improve the utilization efficiency of the light source device. Herein, the reflector is C-shaped, so that the light generated by the light-emitting component is reflected and concentrated, and then illuminated by the opening, thereby increasing the ratio of light entering the light guide plate.

Here, the light-emitting component may be composed of a light-emitting element (for example, a lamp tube or a light-emitting diode) and a light source conversion element. The light source conversion element may be a glass tube filled with a chemical substance such as phosphor powder. In the assembly process of the light source device, the light-emitting component needs to be inserted by the side of the reflector, but in the configuration of the factory production line, the assembly of the light-emitting component is limited by the working space, and thus the productivity of the backlight module cannot be improved. In addition, the assembly of the light-emitting component often causes deformation or distortion of the reflector, and the position of the light-emitting component in the light source device is also not easily fixed, thereby causing light to leak from unevenness.

In an embodiment of the invention, a light source device includes a fixing member, a light source module, a light processing component, and a coupling member. The light source module is located on the fixing member. The fixture includes at least one recess and the light processing element abuts the recess of the fixture. The relative position of the light source module and the light processing component is restricted by the fixing member, and the light processing component and the fixing component are combined by the bonding component.

In another embodiment of the present invention, a backlight module includes a frame, a light guide plate, and a light source device as described above, wherein the light source device is located inside the frame and faces the light guide plate.

In the embodiment of the present invention, the fixing member is used to limit the relative position of the light source module and the light processing component, so that the light processing component and the fixing component are covered by the bonding component to improve the assembly precision and reduce the assembly process. Wear of components. In addition, the fixing member is not easily deformed without unevenness, and effectively solves the problem that light is easily leaked from unevenness in the prior art.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art.

Fig. 1A is an exploded view of a light source device according to a first embodiment of the present invention, wherein the direction indicated by the arrow is a combined direction. Fig. 1B is a combination diagram of the light source device in Fig. 1A.

Referring to FIGS. 1A and 1B , the light source device 10 includes a fixture 11 , a light source module 13 , an optical processing element 14 , and a coupling 15 .

The light source module 13 is located at the fixing member 11. The fixing member 11 has a recess 12 for arranging the light processing element 14, and the light processing element 14 can abut against the recess 12. Here, the relative position of the light source module 13 and the light processing element 14 is restricted by the fixing member 11, and the light processing element 14 and the fixing member 11 are combined by the bonding member 15.

The light source module 13 is disposed opposite to the light processing element 14 . In some embodiments, the light source module 13 and the light processing element 14 are disposed on the same side of the fixture 11, and the light emitting surface of the light source module 13 faces the light processing element 14.

Here, the recess 12 is formed on the surface of the fixing member 11. The upper side of the light processing element 14 is received in the recess 12 to define the position of the light processing element 14. The upper side of the light treatment element 14 can be completely or partially received in the recess 12.

In some embodiments, the bonding member 15 is caused by the fixing member 11, the light source module 13, and the outer side of the light processing member 14 to abut the fixing member 11, the light source module 13, and the light processing member 14.

Fig. 2 is a side view showing an embodiment of the light source module in Fig. 1. For convenience of explanation, the fixing member 11 is omitted in the second drawing.

Referring to FIG. 2, the light source module 13 can be mainly composed of a substrate 131 and a plurality of light emitting elements 132. The plurality of light-emitting elements 132 are spaced apart from each other on the substrate 131 to form a pitch 133 between any two adjacent light-emitting elements 132.

In some embodiments, the joint 15 can be one or more. When a single coupling member 15 is used, the coupling member 15 can be located in any of the spacings 133. When a plurality of bonding members 15 are used, the bonding members 15 may be positioned in each of the pitches 133 or the partial spacings 133, and one or more of the bonding members 15 may be present in one of the spacings 133. When the coupling member 15 is made of an elastic material, the coupling member 15 can elastically fix the relative position of the light processing member 14 and the fixing member 11. When the coupling member 15 is made of a non-elastic material, the coupling member 15 can be locked or The light source module 13 and the light processing element 14 are fixed to the fixing member 11 by means of attachment, wherein the fastening member 15 is fixed to the fixing member 11 or the light source module 13 by a locking member 17 such as a screw or a bolt. The light processing element 14 and the fixture 11 are constrained on the substrate 131 or by other forces directed toward the light processing element 14. Here, the bonding member 15 can be made of a transparent material, but the invention is not limited thereto, and the bonding member 15 can also be made of an opaque material.

In some embodiments, the light-emitting element 132 can be a light-emitting diode, a diode laser, or a light tube, although other solid light sources are equally applicable. The light emitting elements 132 are disposed on the surface of the substrate 131 , and the light emitting surface of the light emitting element 132 faces the light processing element 14 .

In some embodiments, the substrate 131 can be a circuit board, and the light emitting elements 132 are electrically connected to the circuit board. The substrate 131 may be, but is not limited to, a sheet or sheet composed of a material having good electrical and thermal conductivity properties such as aluminum or copper. Since the substrate 131 has a better heat conduction effect, the light-emitting element 132 having a higher wattage can be selected, and the number of the light-emitting elements 132 disposed on the substrate 131 can be reduced while providing sufficient brightness, thereby reducing the light source module 13. The cost of use.

4 and 5 are perspective views of a light source device according to a second embodiment and a third embodiment of the present invention.

Referring to FIG. 4 and FIG. 5 , the fixing member 11 further has a receiving groove 16 , and the light source module 13 is disposed in the receiving groove 16 . The light source module 13 can be placed in the accommodating slot 16 in whole or in part.

Referring to FIG. 4, the surface 113 of the fixing member 11 has a first side and a second side opposite to each other. The first side has a first notch, and the first notch is the recess 12 of the fixing member 11. The second side has a second notch, and the second notch is the receiving groove 16 of the fixing member 11 . Wherein, the first side and the second side may be the long sides of the surface 113.

A plurality of fixing members 11 are oppositely disposed to engage the two sides of the substrate 131 of the light source module 13 in the receiving groove 16 , and a plurality of light emitting elements 132 are suspended between the light processing element 14 and the receiving groove 16 .

Referring to Fig. 5, the fixing member 11 has a bottom surface 11a and two inner walls 11b, and the bottom side 11b2 of the two inner walls 11b respectively engage opposite side edges of the bottom surface 11a. The bottom side 11b2 of each inner wall 11b is recessed to form a receiving groove 16. The top side 11b1 of each inner wall 11b has a notch, and this notch is the recess 12 of the fixing member 11. The substrate 131 of the light source module 13 is embedded in the accommodating groove 16 , and a plurality of light-emitting elements 132 of the light source module 13 are suspended between the recess 12 and the accommodating groove 16 of the fixing member 11 .

In some embodiments, the fixture 11 can be made of metal. At this time, the metal material fixing member 11 can also reflect the light emitted by the light source module 13 or/and the light processing element 14 in addition to providing a fixing function.

In some embodiments, the fixing member 11 may further include a reflective layer 111, and the reflective layer 111 is configured to reflect the light generated by the light source module 13 or/and the light emitted by the reflected light processing element 14.

In some embodiments, the fixture 11 can have a body 112 and the reflective layer 111 is formed on the surface of the body 112. Here, the reflective layer 111 can be located on the surface of the body 112 adjacent to the side of the light source module 13. In other words, the reflective layer 111 and the recess 12 are located on the same surface of the body 112. At this time, the body 112 of the fixing member 11 may be made of metal or non-metal. In some embodiments, the reflective layer 111 can also cover the surface of the recess 12. The reflective layer 111 can cover the entire surface of the body 112 adjacent to the side of the light source module 13 .

Here, the light processing element 14 is used to process the light emitted by the light-emitting element 132 to meet the needs of practical applications.

In some embodiments, the light processing element 14 can be a lens for concentrating or diverging light. The light processing element 14 can also be a filter for passing only light of a particular wavelength or color. In addition, the light processing element 14 can also be a transparent plate having a surface formed with a specific non-transparent pattern such that the light emerging from the light-emitting element 132 exhibits a particular shape or pattern. Of course, the above various designs can also be used in combination.

In some embodiments, the light processing element 14 can comprise a wavelength converting material such as: phosphor powder and/or nanocrystals. The light processing element 14 converts a portion of the light source emitted by the light emitting element 132 into a light source of another wavelength and mixes with the remaining light source emitted by the light emitting element 132 to emit white light. Wherein, the material of the light processing element 14 can be composed of silicone mixed ultraviolet fluorescent powder. In some embodiments, the light processing element 14 can further comprise a transparent tube. Here, the transparent tube can be made of glass or plastic.

Wherein, the wavelength converting material can be filled inside the transparent tube.

Further, the wavelength converting material may be doped in the material of the transparent tube or coated on the surface of the transparent tube. At this time, the transparent tube can be designed as a solid tube.

Fig. 3 is a schematic view of a backlight module according to a first embodiment of the present invention. Referring to FIG. 3 , the backlight module 30 includes a frame 31 , a light guide plate 32 , and a light source device 10 . The light source device 10 is located inside the frame 31 and faces the light guide plate 32. That is to say, the light processing element 14 is located between the light source module 13 and the light guide plate 32. Here, the light incident surface 33 of the light guide plate 32 corresponds to the light emitting surface of the light emitting element 132.

In some embodiments, the light source device 10 is located on the side of the light guide plate 32 such that the light emitted by the light source module 13 penetrates the light processing element 14 and is incident on the light guide plate 32 from the light incident surface 33 of the light guide plate 32. .

In some embodiments, the frame 31 can include a holder 311 and a heat sink 312, and the light source device 10 and the light guide plate 32 are located on the heat sink 312. The heat sink 312 can be two side plates that extend outward at a first angle, and the light source device 10 is disposed in the first angle. Here, the first angle is preferably 90 degrees.

In some embodiments, the mounting bracket 311 is a side panel that extends outwardly at a second angle. One of the two side plates of the fixing frame 311 is directly attached to one of the two side plates of the heat dissipating member 312. Moreover, the other side plate of the fixing frame 311 is opposite to the other side plate of the heat dissipating member 312, and the other side plate of the fixing frame 311 covers the positioning groove 36 of the heat dissipating member 312. Here, the second included angle may preferably be 90 degrees.

In some embodiments, the light guide plate 32 and the light source device 10 are disposed on the same side of the heat sink 312. The heat sink 312 may be provided with a reflective sheet 35, and the reflective sheet 35 is located between the heat sink 312 and the light guide plate 32. The reflection sheet 35 reflects the light incident into the light guide plate 32 toward the light exit surface 34 of the light guide plate 32.

Furthermore, the reflection sheet 35 may be disposed between the heat dissipation member 312 and the light source device 10 to reflect the light generated by the light source device 10 to the light guide plate 32.

In some embodiments, the heat sink 312 utilizes a large area of metal material as the heat sink block, which can enhance the heat dissipation capability of the light source device 10. The heat sink 312 includes a positioning groove 312a and a fitting portion 312b to fix the light source device 10 on the heat sink 312. The light source device 10 is embedded in the positioning groove 312a, and the coupling member 15 is embedded in the fitting portion 312b.

In some embodiments, the substrate 131 is erected on the heat sink 312, and a plurality of light-emitting elements 132 are suspended between the fixture 11 and the heat sink 312. Herein, the heat dissipation effect of the light source device 10 can be improved, and a plurality of light-emitting elements 132 having high luminance can be used, and have better color rendering and longer use quality.

In some embodiments, the other side of the substrate 131 relative to the light-emitting element 132 is directly attached to the heat sink 312 or attached to the fixture 11 . Here, the substrate 131 or the fixing member 11 may be joined to the heat sink 312 by welding or welding. Therefore, the thermal energy generated by the light-emitting element 132 is directly or indirectly transmitted to the heat sink 312 through the substrate 131, and is further radiated by heat exchange between the heat sink 312 and the outside air.

In some embodiments, the fixing member 11 is closely adhered to the substrate 131 of the light source module 13 or the thermal grease is disposed between the fixing member 11 and the substrate 131 of the light source module 13 to be lifted and fixed. Heat conduction between the piece 11 and the light source module 13.

In the embodiment of the present invention, the fixing member is used to limit the relative position of the light source module and the light processing component, so that the light processing component and the fixing component are covered by the bonding component to improve the assembly precision and reduce the assembly process. Wear of components. In addition, the fixing member is not easily deformed without unevenness, and effectively solves the problem that light is easily leaked from unevenness in the prior art.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any modifications and refinements made by those skilled in the art without departing from the spirit of the present invention are encompassed by the present invention. The scope of protection of the present invention is therefore defined by the scope of the appended claims.

10. . . Light source device

11. . . Fastener

12. . . Concave

13. . . Light source module

14. . . Light processing component

15. . . Joint piece

16. . . Locating slot

17. . . Locking element

111. . . Reflective layer

112. . . Ontology

113. . . surface

11a. . . Bottom surface

11b. . . Inner wall

11b1. . . Top side

11b2. . . Bottom side

131. . . Substrate

132. . . Light-emitting element

133. . . spacing

30. . . Backlight module

31. . . frame

311. . . Fixing frame

312. . . Heat sink

32. . . Light guide

33. . . Glossy surface

34. . . Glossy surface

35. . . A reflective sheet

312a. . . Positioning slot

312b. . . Mating part

Fig. 1A is an exploded view of the first embodiment of the light source device of the present invention.

Fig. 1B is a combination view of the first embodiment of the light source device of the present invention.

Figure 2 is a side view of the light source module of the present invention.

3 is a schematic view of a first embodiment of a backlight module of the present invention.

Fig. 4 is a perspective view showing another embodiment of the light source device of the present invention.

Fig. 5 is a perspective view showing another embodiment of the light source device of the present invention.

10. . . Light source device

11. . . Fastener

12. . . Concave

13. . . Light source module

131. . . Substrate

132. . . Light-emitting element

14. . . Light processing component

15. . . Joint piece

111. . . Reflective layer

112. . . Ontology

131. . . Substrate

132. . . Light-emitting element

30. . . Backlight module

31. . . frame

311. . . Fixing frame

312. . . Heat sink

32. . . Light guide

33. . . Glossy surface

34. . . Glossy surface

35. . . A reflective sheet

312a. . . Positioning slot

312b. . . Mating part

Claims (13)

A light source device comprising: a fixing member comprising a body, the body having at least one concave portion; a light source module disposed on a portion of the non-recessed portion of the body; and a light processing element abutting against the concave portion, wherein the fixing The device is configured to limit the relative position of the light source module and the light processing component, and the light source module faces the light processing component; and a bonding member surrounds the light processing component, the light source module and the fixing component. The light source device of claim 1, wherein the portion of the non-recessed portion of the body further comprises a receiving groove, and the light source module is disposed. The light source device of claim 1, wherein the fixing member comprises a reflective layer for reflecting light generated by the light source module. The light source device of claim 1, wherein the light source module comprises a substrate and a plurality of light-emitting elements, wherein the light-emitting elements are disposed on the substrate at a spacing interval, and the pair of the bonding members are located at the spacing. The light source device of claim 1, wherein the bonding member is elastically fixed to fix the relative position of the optical processing component to the fixing member. The light source device of claim 1, wherein the bonding member is a non-elastic object that limits the optical processing component to the fixing member with a force that is positive toward the optical processing component. The light source device of claim 1, wherein the bonding member covers the optical processing component and the fixing member. A backlight module comprising: A frame; a light guide plate; and a light source device according to any one of claims 1 to 7, located in the frame and facing the light guide plate. The backlight module of claim 8, wherein the frame comprises a heat sink, and the light source device is located on the heat sink. The backlight module of claim 8, wherein the light guide plate is located on the heat sink. The backlight module of claim 8, further comprising a reflective sheet disposed on the heat sink between the heat sink and the light guide plate. The backlight module of claim 8, wherein the heat sink comprises a positioning slot, and the light source device is embedded in the positioning slot. The backlight module of claim 8, wherein the heat sink comprises a fitting portion, and the coupling member is embedded in the fitting portion.