CN102798092B - Backlight module and light source device thereof - Google Patents

Abstract

The present invention discloses a backlight module and a light source device thereof, wherein the light source device comprises a fixing member, a light source module, a light processing element and a coupling member. The light source module is located on the fixing member, and the light processing element is against a recess of the fixing member. The fixing member limits the relative position of the light source module and the light processing element, and the coupling member combines the light processing element and the fixing member. The backlight module comprises a frame, a light guide plate and a light source device, and the light source device is located in the frame and faces the light guide plate.

Description

Backlight module and light source device thereof

technical field

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

Background technique

The backlight module can be classified into two types according to the installation position of the light source device: a direct type backlight module and an edge type backlight module. Generally speaking, a backlight module mainly includes a light guide plate, an optical film, a reflection plate and a light source device. Wherein, the light source device can be mainly composed of a reflector and a light-emitting component. The reflection cover is arranged on the outside of the light-emitting assembly to effectively improve the utilization efficiency of the light source device. Here, the reflector is C-shaped to reflect and concentrate the light generated by the light-emitting component, and then irradiate it through its opening, so as to increase the ratio of light entering the light guide plate.

Herein, the light-emitting component may be composed of a light-emitting element (such as a lamp tube or a light-emitting diode) and a light source conversion element. Wherein, the light source conversion element may be a glass tube filled with chemical substances such as fluorescent powder. During the assembly process of the light source device, the light-emitting components need to be inserted from the side of the reflector. However, in the configuration of the factory production line, the assembly of the light-emitting components will be limited by the working space, and thus the production capacity of the backlight module cannot be increased. In addition, the assembly of the light-emitting components often results in deformation or twisting of the reflector, and the position of the light-emitting components in the light source device is not easy to be precisely fixed, resulting in light leakage from unevenness.

Contents of the invention

To solve the above problems, in an embodiment of the present invention, a light source device includes a fixing part, a light source module, a light processing element and a coupling part. The light source module is located on the fixing part. The fixing part includes at least one concave part, and the light processing element is against the concave part of the fixing part. The relative position of the light source module and the light processing element is limited by the fixing piece, and the light processing element and the fixing piece are combined by the combination piece.

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

In the embodiment of the present invention, the relative position of the light source module and the light processing element is limited by using the fixing piece, and the bonding piece is used to cover the light processing element and the fixing piece, so as to improve the accuracy of assembly and reduce the number of components in the assembly process. wear and tear of components. In addition, the fixing part is not easy to be deformed without unevenness, which effectively solves the problem in the prior art that light is easy to leak from the unevenness.

The detailed features and advantages of the present invention are described in detail below in the embodiments, the content of which is sufficient to enable anyone familiar with the relevant art to understand the technical content of the present invention and implement it accordingly, and according to the contents disclosed in this specification, claims and accompanying drawings, The related objects and advantages of the present invention can be easily understood by anyone skilled in the related art.

Description of drawings

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

FIG. 1B is a combination diagram of the first embodiment of the light source device of the present invention;

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

Fig. 3 is the schematic diagram of the first embodiment of the backlight module of the present invention;

Fig. 4 is a schematic perspective view of other embodiments of the light source device of the present invention;

FIG. 5 is a schematic perspective view of another embodiment of the light source device of the present invention.

Explanation of main component symbols

10 light source device

11 fixing parts

12 recesses

13 light source module

14 light processing components

15 binding pieces

16 storage slots

17 locking elements

111 reflective layer

112 Ontology

113 surfaces

11a bottom surface

11b inner wall

11b1 top side

11b2 bottom side

131 substrate

132 light emitting elements

133 spacing

30 backlight module

31 frames

311 fixed frame

312 radiator

32 light guide plate

33 incident surface

34 light emitting surface

35 reflectors

312a positioning slot

312b chimera

detailed description

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

Referring to FIG. 1A and FIG. 1B , the light source device 10 includes a fixing part 11 , a light source module 13 , a light processing element 14 and a coupling part 15 .

The light source module 13 is located on the fixing part 11 . The fixing member 11 has a concave portion 12 for disposing the light processing element 14 , and the light processing element 14 can abut against the concave portion 12 . Here, the relative positions of the light source module 13 and the light processing element 14 are limited by the fixing piece 11 , and the light processing element 14 and the fixing piece 11 are combined by the connecting piece 15 .

Wherein, the light source module 13 is arranged 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 fixing member 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 treatment element 14 is housed in the recess 12 to define the position of the light treatment element 14 . The upper side of the light processing element 14 can be accommodated completely or partially in the recess 12 .

In some embodiments, the combination part 15 makes the fixing part 11 , the light source module 13 and the light processing element 14 close together from the outer sides of the fixing part 11 , the light source module 13 and the light processing element 14 .

FIG. 2 is a side view of an embodiment of the light source module in FIG. 1A and FIG. 1B . For convenience of illustration, the drawing of the fixing member 11 is omitted in FIG. 2 .

Please refer to FIG. 2 , the light source module 13 is mainly composed of a substrate 131 and a plurality of light emitting elements 132 . Wherein, a plurality of light-emitting elements 132 are disposed on the substrate 131 at intervals for forming a distance 133 between any two adjacent light-emitting elements 132 .

In some embodiments, there may be one or more binding members 15 . When a single joint 15 is used, this joint 15 can be located in any interval 133 . However, when a plurality of binding pieces 15 are used, the binding pieces 15 may be located in each interval 133 or part of the intervals 133 , and one or more binding pieces 15 may be present in one interval 133 . When the joint 15 is made of elastic material, the joint 15 can elastically fix the relative position of the light processing element 14 and the fixing member 11; when the joint 15 is made of a non-elastic material, the joint 15 can be locked or locked. The light source module 13 and the light processing element 14 are fixed to the fixing member 11 by attaching, wherein the locking method, such as using a locking element 17 such as a screw or a bolt, fixes the joint member 15 to the fixing member 11 or the substrate 131 of the light source module 13 The light processing element 14 and the fixing member 11 are restrained by the force on the light processing element 14 or by other forces that are positive to the light processing element 14 . Here, the bonding element 15 can be made of transparent material, but the present invention is not limited thereto, and the bonding element 15 can also be made of opaque material.

In some embodiments, the light emitting element 132 can be a light emitting diode, a diode laser or a light tube, and of course other solid light sources are also applicable. Wherein, the light emitting elements 132 are disposed on the surface of the substrate 131 , and the light emitting surfaces of the light emitting elements 132 face the light processing element 14 .

In some embodiments, the substrate 131 may be a circuit board, and the light emitting element 132 is electrically connected to the circuit board. The substrate 131 may be, but not limited to, a plate or a sheet made of aluminum or copper with good electrical and thermal conductivity. Since the substrate 131 has a better heat conduction effect, it is better to use a light emitting element 132 with a higher wattage, so that the number of light emitting elements 132 arranged on the substrate 131 can be reduced while providing sufficient luminance, thereby reducing the light source module 13. use cost.

4 and 5 are perspective schematic diagrams of light source devices according to the second embodiment and the third embodiment of the present invention.

Please refer to FIG. 4 and FIG. 5 , the fixing member 11 can also have a receiving groove 16 , and the light source module 13 is disposed in the receiving groove 16 . Wherein, the light source module 13 can be completely or partially placed in the accommodating groove 16

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 accommodating groove 16 of the fixing member 11 . Wherein, the first side and the second side may be long sides of the surface 113 .

The plurality of fixing parts 11 are oppositely disposed so that both sides of the substrate 131 of the light source module 13 are engaged in the receiving groove 16 , and the plurality of light emitting elements 132 are suspended between the light processing element 14 and the receiving groove 16 .

Please refer to FIG. 5 , the fixing member 11 has a bottom surface 11a and two inner walls 11b , and the bottom sides 11b2 of the two inner walls 11b connect to two opposite sides of the bottom surface 11a respectively. 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 the 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 the plurality of light emitting elements 132 of the light source module 13 are suspended between the recess 12 of the fixing member 11 and the accommodating groove 16 .

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

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

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

In some embodiments, the light processing element 14 may be a lens for converging or diverging light. The light processing element 14 may also be a filter for only passing light of a specific wavelength or color. In addition, the light processing element 14 can also be a transparent plate with a specific non-transparent pattern formed on the surface, so that the light emitted by the light emitting element 132 presents a specific shape or pattern. Of course, the above-mentioned various designs can also be used in combination.

In some embodiments, the light processing element 14 may include wavelength converting materials, such as phosphors and/or nanocrystals. The light processing element 14 converts a part of the light source emitted by the light emitting element 132 into a light source of another wavelength and mixes it 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 may be composed of silica gel mixed with ultraviolet phosphor. In some embodiments, the light processing element 14 may also comprise a transparent tube. Here, the transparent tube can be made of glass or plastic.

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

In addition, the wavelength conversion material can also 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 diagram 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 in 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 , so that the light emitted by the light source module 13 passes through the light processing element 14 and enters the light guide plate 32 from the light incident surface 33 of the light guide plate 32 .

In some embodiments, the frame 31 may include a fixing frame 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 . Wherein, the heat dissipation element 312 may be two side plates respectively extending outward at a first included angle, and the light source device 10 is disposed in the first included angle. Here, the first included angle may preferably be 90 degrees.

In some embodiments, the fixing frame 311 is two side panels respectively extending outward at a second included angle. One of the side panels of the fixing frame 311 is directly attached to one of the side panels of the heat sink 312 . Moreover, the other side plate of the fixing frame 311 is opposite to the other side plate of the heat sink 312 , and the positioning groove 36 of the heat sink 312 is covered by the other side plate of the fixing frame 311 . 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 . A reflective sheet 35 may be disposed on the heat sink 312 , and the reflective sheet 35 is located between the heat sink 312 and the light guide plate 32 . The reflective sheet 35 reflects the light incident on the light guide plate 32 toward the light emitting surface 34 of the light guide plate 32 .

Furthermore, the reflection sheet 35 can also be disposed between the heat sink 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 dissipation element 312 uses a metal material with a large area as a heat dissipation block, and the metal heat dissipation block can improve the heat dissipation capability of the light source device 10 . The heat sink 312 includes a positioning groove 312 a and a fitting portion 312 b for fixing 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 stands on the heat dissipation element 312 , so that the plurality of light emitting elements 132 are suspended between the fixing element 11 and the heat dissipation element 312 . Here, the heat dissipation effect of the light source device 10 can be improved, multiple high-intensity light-emitting elements 132 can be used, and better color rendering and longer-time use quality can be obtained.

In some embodiments, the other side of the substrate 131 opposite to the light-emitting element 132 is directly attached to the heat sink 312 or attached to the fixing member 11 . Here, the substrate 131 or the fixing member 11 can be bonded to the heat sink 312 by welding or welding. Therefore, the heat energy generated by the light emitting element 132 is directly or indirectly transferred to the heat sink 312 through the substrate 131 , and then the heat is exchanged with the outside air through the heat sink 312 to dissipate heat.

In some embodiments, the fixing member 11 and the base plate 131 of the light source module 13 can also be lifted by sealing the fixing member 11 and the substrate 131 of the light source module 13, or sandwiching thermal paste between the fixing member 11 and the base plate 131 of the light source module 13. Heat conduction between the light source modules 13 .

In the embodiment of the present invention, the relative position of the light source module and the light processing element is limited by using the fixing piece, and the bonding piece is used to cover the light processing element and the fixing piece, so as to improve the accuracy of assembly and reduce the number of components in the assembly process. wear and tear of components. In addition, the fixing part is not easy to be deformed without unevenness, which effectively solves the problem in the prior art that light is easy to leak from the unevenness.

Although the technical content of the present invention has been disclosed by preferred embodiments, it is not intended to limit the present invention. Any changes and modifications made by those skilled in the art without departing from the spirit of the present invention should be included in this document. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims (12)

1. a light supply apparatus, comprises:

Light source module, comprises substrate and multiple light-emitting component, those light-emitting components with an intervals establishBe placed on this substrate,

Light treatment element,

Fixture, comprises a body, this body have along its length arrange for against light source moduleThe non-recess part of substrate, and at least one recessed for against light treatment element arranging along its lengthPortion, wherein this fixture is in order to limit the relative position of this light source module and this light treatment element, and this lightThe light-emitting area of source module is towards this light treatment element; And

Conjunction, transverse to length direction coated this light treatment element, this light source module and this fixture,Make together with fixture, light source module abut against with light treatment element, by light source module and light treatment elementPosition is fixed.

2. light supply apparatus as claimed in claim 1, wherein the non-recess part of this body also comprises accommodatingGroove, arranges this light source module.

3. light supply apparatus as claimed in claim 1, wherein this fixture comprises reflecting layer, in order to insteadPenetrate the light that this light source module produces.

4. light supply apparatus as claimed in claim 1, wherein this conjunction is to being positioned at this spacing.

5. light supply apparatus as claimed in claim 1, when wherein this conjunction is elastomeric objects with elastic forceFix the relative position of this light treatment element and this fixture.

6. light supply apparatus as claimed in claim 1, when wherein this conjunction is non-resilient object with justTo limit this light treatment element and this fixture in the power of light treatment element.

7. a backlight module, comprises:

Framework;

LGP; And

One as the light supply apparatus of claim 1 to 6 any one, is positioned at this framework and towards this leaded lightPlate.

8. backlight module as claimed in claim 7, wherein this framework comprises radiating piece, this light source dressOn this radiating piece.

9. backlight module as claimed in claim 8, wherein this LGP is positioned on this radiating piece.

10. backlight module as claimed in claim 8, also comprises a reflector plate, is arranged at this radiating pieceUpper and between this radiating piece and this LGP.

11. backlight modules as claimed in claim 8, wherein this radiating piece comprises locating slot, this light sourceDevice is embedded in this locating slot.

12. backlight modules as claimed in claim 8, wherein this radiating piece comprises fitting portion, this combinationPart is embedded at this fitting portion.