TWI454793B - Light source device - Google Patents

Description

Light source device

The present invention relates to a light source device, and more particularly to a light source device having a heat dissipating component.

At present, electronic devices often use a flat display module to display images, and the technology of the liquid crystal display module is more sophisticated and popular. However, since the display panel of the liquid crystal display module cannot emit light by itself, a backlight module must be provided under the display panel to provide light required for displaying the screen. In order to avoid overheating of the light source in the backlight module, a heat dissipating component with good thermal conductivity may be disposed in the back panel, and the light source may be disposed on the heat dissipating component to conduct heat generated when the light source emits light to the heat dissipating component, but dissipate heat. In this configuration, the component is wrapped in the backplane and cannot effectively conduct heat to the outside. Another heat dissipation method is to directly arrange the light source on the back panel of the backlight module, and the back plate is made of a material with high thermal conductivity to dissipate heat from the light source. However, the back plate with high thermal conductivity material (such as the aluminum back plate) increases the product. manufacturing cost.

US Patent No. US20110007236 A1 discloses a heat dissipation structure of a backlight module, wherein a heat sink is fixed in the backlight module to dissipate heat from the light source. Chinese Patent No. CN201606844U discloses a backlight device in which a heat dissipating extruded plate is mounted on a back plate of a backlight device, and a light source is attached to the heat dissipating plate through an insulating and heat conducting sheet.

The invention provides a light source device which has better heat dissipation efficiency and can save manufacturing costs.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

In order to achieve one or a part or all of the above or other purposes, an embodiment of the present invention provides a light source device including a back plate, a heat dissipating component, and a light source. The heat dissipating component is fixed to the backboard. The back plate forms a receiving space with the heat dissipating component. At least a portion of the heat dissipating component is located outside of the receiving space. The light source is disposed on the heat dissipating component and located in the accommodating space.

Based on the above, at least one of the following advantages is obtained in the above embodiments of the present invention, the back plate and the heat dissipating component form an accommodating space for accommodating the light source, and the heat dissipating component is not covered in the accommodating space, but at least partially located in the accommodating space. outer. Thereby, the heat generated by the light source disposed on the heat dissipating component can be effectively conducted to the outside through the heat dissipating component to improve the heat dissipating efficiency of the light source device.

The above described features and advantages of the invention will be apparent from the following description.

The foregoing and other objects, features, and advantages of the invention will be apparent from the Detailed Description The directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

1 is a perspective view of a light source device according to an embodiment of the present invention. 2 is an exploded view of the backing plate and the heat dissipating component of FIG. 1. Referring to FIG. 1 and FIG. 2 , the light source device 100 of the present embodiment includes a back plate 110 , at least one heat dissipating component 120 (shown as two), and at least one light source 130 . The heat dissipating component 120 is fixed on the backboard 110, and the backplane 110 and the heat dissipating component 120 form a receiving space 110a. At least a portion of the heat dissipating component 120 is located outside the accommodating space 110a. The light source 130 is, for example, a light emitting diode strip and disposed on the heat dissipating component 120 and located in the accommodating space 110a.

In the above configuration, the backplane 110 and the heat dissipating component 120 form an accommodating space 110a for accommodating the light source 130. The heat dissipating component 120 is not covered in the accommodating space 110a, but is at least partially located outside the accommodating space 110a. Thereby, the heat generated by the light source 130 disposed on the heat dissipating component 120 can be effectively conducted to the outside through the heat dissipating component 120 to improve the heat dissipating efficiency of the light source device 100. In addition, since the light source 130 mainly dissipates heat through the heat dissipating component 120 instead of dissipating heat through the backplane 110, the backplane 110 does not need to use a high thermal conductive material, thereby saving manufacturing costs.

The accommodating space 110a formed by the back plate 110 and the heat dissipating component 120 of the embodiment can accommodate an optical sheet such as a light guide plate, an optical film, and a reflection sheet, and the light source 130 and the optical sheet form a backlight module.

In the present embodiment, the material of the heat dissipating component 120 is, for example, aluminum having high heat conductivity, and the material of the backing plate 110 is, for example, a steel electroplated steel plate (SECC) having low heat conduction efficiency and low cost. In other embodiments, the heat dissipating component 120 can be selected from other suitable materials having high heat conduction efficiency, and the backing plate 110 can be selected from other materials having lower heat conduction efficiency and lower cost, which is not limited by the present invention.

The back plate 110 of this embodiment includes a bottom plate 112 and two side walls 114. The two side walls 114 are vertically connected to opposite sides of the bottom plate 112, and two ends of the heat dissipating component 130 are respectively disposed on the two side walls 114. In detail, each end wall 114 has a folded wall 114a at its end, and both ends of the heat dissipating component 120 are respectively locked to the two folded walls 114a by the lock attachment 120a. In this embodiment, the lock attachment 120a is, for example, a screw, the heat dissipation element 120 has a lock hole 120b (shown in FIG. 2), the fold wall 114a of the side wall 114 has a lock hole 114b, and the lock attachment 120a passes through the lock hole 120b and the lock hole 114b. The heat dissipating component 120 is locked to the backboard 110. In other embodiments, the heat dissipating component 120 can be secured to the backplane 110 by other suitable means, which is not limited by the present invention.

Figure 3 is a partial cross-sectional view of the light source device of Figure 1. Referring to FIG. 1 to FIG. 3 , the heat dissipating component 120 of the embodiment includes a first plate body 122 and a second plate body 124 . The two ends of the first plate body 122 are respectively disposed on the two side walls 114. The first plate body 122 is perpendicular to the bottom plate 112 and has a gap G between the bottom plate 112 and the bottom plate 112. The second plate body 124 is vertically connected to the first plate body 122 and covers the gap G.

Figure 4 is a partial side elevational view of the light source device of Figure 1. Referring to FIG. 1 , FIG. 2 and FIG. 4 , the first board body 122 has a folding wall 122 a , and each side wall 114 is limited between the folding wall 122 a and the second board 124 to prevent the back board 110 from being perpendicular to the heat dissipating component 120 . The direction D1 of the bottom plate 112 relatively moves. In addition, the second plate body 124 has two folded walls 124a extending to the outer sides of the side walls 114 to prevent the back plate 110 from moving relative to the heat dissipating member 120 in the direction D2 of the vertical side walls 114. By the design of the folding wall 122a and the folding wall 124a, the relative movement of the backing plate 110 and the heat dissipating component 120 can be restricted, so that the backing plate 110 and the heat dissipating component 120 can be assembled by using fewer lock attachments.

5A and 5B are assembly flowcharts of the light source device of Fig. 1. When the assembly of the backplane 110 and the heat dissipating component 120 is performed, the heat dissipating component 120 may be first placed on the backplane 110 as shown in FIG. 5A. Next, the heat dissipating component 120 is pushed in the direction D3 to the position of the backing plate 110 to the position shown in FIG. 5B, so that the side wall 114 of the backing plate 110 is restricted by the folding wall 122a and the folding wall 124a of the heat dissipating component 120. Finally, the heat dissipating component 120 is locked to the folded wall 114a of the side wall 114 by the lock attachment 120a to complete the assembly.

Figure 6 is a partial side elevational view of a light source device in accordance with another embodiment of the present invention. Referring to FIG. 6, in the light source device 200 of the embodiment, the bottom plate 212 and the side wall 214 of the back plate 210, the folding wall 214a of the side wall 214, the first plate body 222 and the second plate body 224 of the heat dissipating component 220, The arrangement of the folded wall 222a of one plate 222 and the lock attachment 220a is the same as that shown in FIG. 4, and details are not described herein. The light source device 200 is different from the light source device 100 in that the second plate body 124 of the heat dissipating component 120 has a folded wall 124a, and the second plate body 224 of the heat dissipating component 220 does not have a folded wall, so the light source device 200 can have a small overall width. . Whether or not the folding wall is formed in the second plate body can be determined according to the design requirements, and the present invention does not limit the same.

Figure 7 is a partial cross-sectional view showing a light source device according to another embodiment of the present invention. Referring to FIG. 7, in the light source device 300 of the embodiment, the bottom plate 312 of the back plate 310 and the side wall 314, the first plate 322 and the second plate 324 of the heat dissipating component 320, and the folded wall 322a of the first plate 322 The arrangement of the lock attachment 320a is the same as that of the configuration shown in FIG. 3, and details are not described herein. The difference between the light source device 300 and the light source device 100 is that the second plate 324 has an extending portion 324a extending to the bottom surface of the bottom plate 312 and outside the receiving space 310a to increase the heat dissipation area of the heat dissipating component 320 and improve heat dissipation. effectiveness.

Fig. 8 is a perspective view of the light source device of Fig. 7. Referring to FIG. 8, the extension portion 324a of the second plate body 324 may have a plurality of holes 324b to further increase the heat dissipation area of the extension portion 324a. In other embodiments, a bite or other suitable structure may be formed on the extension 324a to replace the aperture 324b to increase the heat dissipation area of the extension 324a, which is not limited in the present invention. In addition, in addition to locking the two ends of the heat dissipating component 320 to the backplane 310 by the lock attachment 320a, the extension 324a can be locked to the backboard 310 by the lock attachment 320c to make the overall structure more stable. .

In summary, in the above embodiments of the present invention, at least one of the following advantages is obtained, the back plate and the heat dissipating component form an accommodating space for accommodating the light source, and the heat dissipating component is not covered in the accommodating space, but at least partially located Space outside the accommodation. Thereby, the heat generated by the light source disposed on the heat dissipating component can be effectively conducted to the outside through the heat dissipating component to improve the heat dissipating efficiency of the light source device. In addition, since the light source dissipates heat through the heat dissipating component rather than through the backplane, the backplane does not need to be made of a high thermal conductivity material, thereby saving manufacturing costs. In addition, by limiting the sidewalls of the backplane by a plurality of folding walls on the heat dissipating component, the relative movement of the backplane and the heat dissipating component can be restricted, so that the backplane and the heat dissipating component can be assembled by using fewer lock accessories. To simplify the process.

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 scope of the claims are only used to name the elements or distinguish different embodiments or ranges, and are not intended to limit the number of elements. Upper or lower limit.

100, 200, 300. . . Light source device

110, 210, 310. . . Backplane

110a, 310a. . . Accommodating space

112, 212, 312. . . Bottom plate

114, 214, 314. . . Side wall

114a, 122a, 124a, 214a, 222a, 314a, 322a. . . Folding wall

114b, 120b. . . keyhole

120, 220, 320. . . Heat sink

120a, 220a, 320a, 320c. . . Lock attachment

122, 222, 322. . . First plate

122a, 124a, 214a, 222a, 322a. . . Folding wall

124, 224, 324. . . Second plate

130. . . light source

324a. . . Extension

324b. . . Broken hole

D1, D2, D3. . . direction

G. . . gap

1 is a perspective view of a light source device according to an embodiment of the present invention.

2 is an exploded view of the backing plate and the heat dissipating component of FIG. 1.

Figure 3 is a partial cross-sectional view of the light source device of Figure 1.

Figure 4 is a partial side elevational view of the light source device of Figure 1.

5A and 5B are assembly flowcharts of the light source device of Fig. 1.

Figure 6 is a partial side elevational view of a light source device in accordance with another embodiment of the present invention.

Figure 7 is a partial cross-sectional view showing a light source device according to another embodiment of the present invention.

Fig. 8 is a perspective view of the light source device of Fig. 7.

100. . . Light source device

110. . . Backplane

110a. . . Accommodating space

112. . . Bottom plate

114. . . Side wall

114a. . . Folding wall

114b. . . keyhole

120. . . Heat sink

120a. . . Lock attachment

122. . . First plate

122a, 124a. . . Folding wall

124. . . Second plate

130. . . light source

D1, D2. . . direction

Claims (8)

A light source device comprising: a back plate comprising a bottom plate and two side walls, wherein the two side walls are vertically connected to opposite side edges of the bottom plate, each end wall has a folded wall at the end; a heat dissipating component, Fixed on the backplane, wherein the backplane and the heat dissipating component form a receiving space, at least a portion of the heat dissipating component is located outside the receiving space, and two ends of the heat dissipating component are respectively disposed on the two side walls, the heat dissipating component The two ends are respectively locked on the two folding walls; and a light source is disposed on the heat dissipating component and located in the receiving space. The light source device of claim 1, wherein the heat dissipating component is made of aluminum. The light source device of claim 1, wherein the material of the back plate comprises a galvanized steel plate. The light source device of claim 1, wherein the heat dissipating component comprises: a first plate body, wherein two ends of the first plate body are respectively disposed on the two side walls, wherein the first plate body is perpendicular to the first plate body The bottom plate has a gap with the bottom plate; and a second plate body is vertically connected to the first plate body and covers the gap. The light source device of claim 4, wherein the first plate has a folded wall, and each of the side walls is limited between the folded wall of the first plate and the second plate to block the The back plate is perpendicular to the heat dissipating component The direction of the bottom plate is relatively moved. The light source device of claim 4, wherein the second plate has two folded walls, and the two folded walls of the second plate extend to the outer sides of the two side walls respectively to block the back plate and the heat dissipation. The components move relative to each other in the direction perpendicular to the two side walls. The light source device of claim 4, wherein the second plate body has an extension portion extending to a bottom surface of the bottom plate and outside the accommodation space. The light source device of claim 7, wherein the extension of the second plate has a plurality of holes.