TWI422778B - Light source module - Google Patents

Description

Light source module

The present invention relates to an optical device, and more particularly to a light source module.

A light emitting diode (Light Emitting Diode) is a semiconductor component, and its light-emitting principle is to convert electrical energy into light energy, and the life of the light-emitting diode is as long as 100,000 hours or more. In addition, the light-emitting diode has the advantages of fast response speed, small volume, power saving, low pollution, high reliability, and suitable for mass production, so the application field of the light-emitting diode is very wide, such as a large billboard, traffic light , various display devices, mobile phones, scanners, fax machine light sources and LED lights.

In the case of a light-emitting diode lamp, the light bar is generally fixed in the outer casing of the lamp. When the user wants to replace the light bar in the luminaire, the luminaire needs to be removed first, and the outer casing is removed and the components such as the reflection sheet, the light guide plate and the diffusion sheet are removed to disassemble or install the light bar, so the replacement of the light bar is relatively labor-intensive. At this time, the user cannot replace the light bar with different brightness, color temperature or color at any time. The Republic of China Patent No. TWM315841 discloses a light-emitting diode light source device that can be replaced with a backlight module. The Republic of China Patent No. TW594248 discloses a backlight module having an extraction hole for enabling replacement of a light source through an extraction aperture. The Republic of China Patent No. TW200811522 discloses a light source fixing structure of a backlight module having a light-emitting element that can be exchanged. The Republic of China Patent No. TW200825572 discloses a movable light strip that is easily removed from the screen.

The invention provides a light source module, wherein the light emitting diode light strip is convenient for replacement.

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

To achieve one or a part or all of the above or other purposes, an embodiment of the present invention provides a light source module including a housing, a guide rail, a light guide plate, a heat sink, and a light emitting diode light strip. The rail is fixed in the outer casing. The light guide plate is disposed in the outer casing. The heat sink has a guide groove and is slidably disposed on the guide rail by the guide groove. The heat sink is adapted to slide along the rail. The LED strip is fixed to the heat sink. The light-emitting diode light strip is adapted to move into or out of the housing as the heat sink slides along the rail. When the light emitting diode light bar is located in the outer casing, the light emitting diode light bar is disposed on a side of the light guide plate.

Based on the above, at least one of the following advantages is achieved in the above embodiments of the present invention, the light-emitting diode light bar is fixed on the heat sink, and the heat sink is slidably disposed on the guide rail in the outer casing. The user can pull the heat sink to slide along the guide rail, so that the light-emitting diode light strip moves into or out of the outer casing along with the heat sink. Thereby, the light-emitting diode light strip can be taken out or placed without disassembling the outer casing and other components in the outer casing, so as to improve the convenience of replacing the light-emitting diode light strip.

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 module according to an embodiment of the present invention. 2 is an exploded view of the light source module of FIG. 1. Figure 3 is a perspective view of the back cover of Figure 1. Referring to FIG. 1 to FIG. 3 , the light source module 100 of the present embodiment includes a housing 110 , a guide rail 120 , a light guide plate 130 , a heat dissipation device 140 , and a light-emitting diode light bar 150 . The outer casing 110 includes a rear assembled cover 112 and a front frame 114. The guide rail 120 is fixed on the rear cover 112 and located in the outer casing 110. The light guide plate 130, the heat dissipation device 140 and the light-emitting diode light bar 150 are disposed in the outer casing 110. In this embodiment, the light source module 100 is, for example, a light-emitting diode lamp. However, the present invention is not limited thereto, and can also be applied to a backlight module of a display device.

4 is a partial perspective view of the light source module of FIG. 1. Figure 5 is a partial perspective view of the heat sink of Figure 2; FIG. 6 is a schematic view of the light emitting diode strip of FIG. 2 removed from the outer casing. Referring to FIG. 4 and FIG. 5 , in detail, the heat dissipation device 140 of the embodiment has a guiding slot 142 and is slidably disposed on the guide rail 120 by the guiding slot 142 , and the LED strip 120 is glued or screwed, for example. Locking or other suitable means are attached to the heat sink 140. The heat sink 140 is adapted to slide along the guide rail 120, and the light emitting diode strip 150 is adapted to move out of the housing 110 (as shown in FIG. 6) as the heat sink 140 slides along the rail 120, and is adapted to be associated with the heat sink 140 Moving along the guide rail 120 moves into the outer casing 110 (shown in Figure 1). When the light emitting diode light bar 150 is located in the outer casing 110, the light emitting diode light bar 150 is disposed on one side of the light guide plate 130, and a light beam emitted by the light emitting diode light bar 150 is adapted to be transmitted to the light guide plate 130. . FIG. 6 illustrates two heat dissipating devices 140 and two LED strips 150 disposed on the same side of the housing 110 and moving into or out of the housing 110 in the same direction. However, the present invention is not limited thereto. The heat sink 140 and the LED strip 150 can also be disposed on the other side of the housing 110. The light source module has four heat sinks 140 and four LED strips 150, respectively. Sliding in opposite directions of the outer casing 110.

With the above configuration, the user can pull the heat sink 140 to slide along the guide rail 120 to move the LED strip 150 into or out of the housing 110 along with the heat sink 140. Thereby, the light-emitting diode light bar 150 can be taken out or placed without disassembling the outer casing 110 and other components in the outer casing 110 to improve the convenience of the replacement of the light-emitting diode light bar 150.

Referring to FIG. 4 and FIG. 5 , in the embodiment, the heat sink 140 has an opposite top surface 144 and a bottom surface 146 . The guide groove 142 is formed on the bottom surface 146, and the front frame 114 is assembled on the rear cover 112 and contacts the top surface 144 to limit the heat sink 140 to slide along the guide rail 142. In detail, the outer casing 110 includes a rear cover 112 and a front frame 114. Therefore, when the heat sink 140 is placed on the rear cover 112, the heat sink 140 can be stably disposed through the upper front frame 114. The rear cover 112 slides along the guide rail 142 with the space in the front frame 114, so that no other fixing member is required to fix the heat sink 140 in the outer casing 110. In addition, the present invention does not limit the guide rail 120 to be fixed on the rear cover 112 and located in the outer casing 110. In other embodiments, the guide rail may be fixed on the front frame and located in the outer casing, and the heat dissipation device correspondingly slides along the guide rail. There is a gap G between at least one surface 148 of the heat sink 140 and the outer casing 110 to facilitate the circulation of the heat dissipation airflow. The gap G can prevent the heat sink 140 from being over-tightened with the outer casing 110 to ensure that the heat sink 140 can smoothly slide along the guide rail 142. In addition, if the rear cover 112 and the front frame 114 are assembled in a screw-lock manner, the gap G further has a function of providing a space for screw locking, and the screw cannot be completely locked into the outer casing 110 due to the blocking of the heat sink 140.

7 is a perspective view of a part of the components of the light source module of FIG. 1. Referring to FIGS. 6 and 7 , the side of the outer casing 110 of the present embodiment has an opening 116 , and the heat sink 140 is adapted to slide out of the outer casing 110 through the opening 116 . Referring to FIG. 1 and FIG. 2 , the light source module 100 further includes a cover 118 , and the cover 118 is fixed to the heat sink 140 . When the heat sink 140 is located in the outer casing 110, the cover 118 covers the opening 116 to avoid exposing the heat sink 140 and the light emitting diode strip 150, providing an aesthetically pleasing visual effect. The user can pull the cover 118, and the heat sink 140 and the LED strip 150 connected to the cover 118 are pulled out from the housing 110 as shown in FIG. 6, so that the cover 118 can provide the user with the heat sink 140. And the light emitting diode light bar 150 is pulled out and replaced from the opening 116.

Referring to FIG. 2 and FIG. 4 , in the embodiment, the light source module 100 further includes a diffusion sheet 160 , a first reflection sheet 170 (shown as two), and a second reflection sheet 180 . The light guide plate 130 has a light-emitting surface 132 and a bottom surface 134. The diffusion sheet 160 is disposed on the light-emitting surface 132. The first reflection sheet 170 is disposed on the diffusion sheet 160, and the second reflection sheet 180 is disposed on the bottom surface 134. The light-emitting diode light bar 150 is adapted to emit a light beam to the light guide plate 130. The light beam is reflected by the first reflective sheet 170 and the second reflective sheet 180 to the light-emitting surface 132 of the light guide plate 130 and reaches through the diffusion sheet 160. external.

As shown in FIG. 3, the guide rail 120 of the present embodiment is integrally joined to the rear cover 112, for example. However, the present invention is not limited thereto, and the guide rail 120 may be connected to the rear cover 112 by other suitable means, which will be exemplified below by way of drawings. Figure 8 is a cross-sectional view showing a casing and a guide rail according to another embodiment of the present invention. Referring to FIG. 8 , the guide rail 220 of the embodiment is fixed to the back cover 212 of the outer casing 210 by, for example, gluing. Figure 9 is a cross-sectional view showing a casing and a guide rail according to another embodiment of the present invention. Referring to FIG. 9, the light source module of the embodiment further includes a fixing member 390, and the housing 310 has a slot 310a. The fixing member 390 is fixed to the outer surface of the rear cover 312 of the outer casing 310 and corresponds to the slot 310a. The rail 320 is fixed to the fixing member 390 and protrudes into the outer casing 310 through the slot 310a. The fastener 390 of FIG. 9 is secured to the back cover 312 of the outer casing 310, for example, by gluing or other suitable means.

In summary, in the above embodiments of the present invention, at least one of the following advantages is obtained, the light-emitting diode light bar is fixed on the heat dissipation device, and the heat dissipation device is slidably disposed on the guide rail in the outer casing. The user can pull the heat sink to slide along the guide rail, so that the light-emitting diode light strip moves into or out of the outer casing along with the heat sink. Thereby, the light-emitting diode light strip can be taken out or placed without disassembling the outer casing and other components in the outer casing, so as to improve the convenience of replacing the light-emitting diode light strip.

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.

100. . . Light source module

110, 210, 310. . . shell

112, 212, 312. . . Back cover

114. . . Front frame

116. . . Opening

118. . . Cover

120, 220, 320. . . guide

130. . . Light guide

132. . . Glossy surface

134. . . Bottom

140. . . Heat sink

142. . . Guide slot

144. . . Top surface

146. . . Bottom

148. . . surface

150. . . LED light bar

160. . . Diffusion sheet

170. . . First reflection sheet

180. . . Second reflection sheet

310a. . . Slotting

390. . . Fastener

G. . . Void

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

2 is an exploded view of the light source module of FIG. 1.

Figure 3 is a perspective view of the back cover of Figure 1.

4 is a partial perspective view of the light source module of FIG. 1.

Figure 5 is a partial perspective view of the heat sink of Figure 2;

FIG. 6 is a schematic view of the light emitting diode strip of FIG. 2 removed from the outer casing.

7 is a perspective view of a part of the components of the light source module of FIG. 1.

Figure 8 is a cross-sectional view showing a casing and a guide rail according to another embodiment of the present invention.

Figure 9 is a cross-sectional view showing a casing and a guide rail according to another embodiment of the present invention.

110. . . shell

112. . . Back cover

114. . . Front frame

120. . . guide

130. . . Light guide

132. . . Glossy surface

134. . . Bottom

140. . . Heat sink

142. . . Guide slot

144. . . Top surface

146. . . Bottom

148. . . surface

150. . . LED light bar

160. . . Diffusion sheet

170. . . First reflection sheet

180. . . Second reflection sheet

G. . . Void

Claims (9)

A light source module includes: a casing having a slot; a guide rail fixed in the casing; a light guide plate disposed in the casing; a heat dissipating device having a guiding slot and sliding by the guiding slot The light-emitting device is adapted to slide along the guide rail; a light-emitting diode light strip is fixed on the heat-dissipating device, wherein the light-emitting diode light strip is adapted to follow the heat-dissipating device along the guide rail Sliding into or out of the outer casing, when the light emitting diode light bar is located in the outer casing, the light emitting diode light bar is disposed on one side of the light guiding plate; and a fixing member fixed to the outer casing The outer surface corresponds to the slot, and the rail is fixed to the fixing member and extends into the outer casing through the slot. The light source module of claim 1, wherein the guide rail is integrally formed to the outer casing. The light source module of claim 1, wherein the guide rail is glued to the outer casing. The light source module of claim 1, wherein the outer casing comprises: a rear cover fixed to the rear cover; and a front frame assembled on the rear cover and limiting the heat dissipation device To slide along the rail. The light source module of claim 4, wherein the heat sink has an opposite top surface and a bottom surface, the guide groove is formed on the bottom surface The front frame contacts the top surface to limit the heat sink. The light source module of claim 1, wherein at least one surface of the heat sink has a gap between the surface and the outer casing. The light source module of claim 1, wherein one side of the outer casing has an opening, and the heat dissipating device is adapted to slide into or out of the outer casing through the opening. The light source module of claim 7, further comprising a cover body, wherein the cover body is fixed to the heat dissipation device, and the cover body covers the opening when the heat dissipation device is located in the outer casing. The light source module of claim 1, further comprising: a diffusion sheet, wherein the light guide plate has an opposite light emitting surface and a bottom surface, the diffusion sheet is disposed on the light emitting surface; a first reflective sheet And disposed on the diffusion sheet; and a second reflective sheet disposed on the bottom surface.