TWI576638B - Light source assembly and backlight module - Google Patents

Description

Light source component and backlight module

The present invention relates to a light source component, and more particularly to a light source component and a backlight module.

The conventional backlight module mainly comprises a back plate, a light guide plate and a light bar. The light guide plate and the light bar are disposed on the back plate, and the light bar is disposed on a side of the light guide plate adjacent to the light incident surface. In order to ensure that the light-emitting diodes on the light bar are aligned with the light-incident surface of the light guide plate, it is common practice to use two different height spacers respectively disposed under the light bar and the light guide plate to enable the light-emitting diode and the guide. The light incident surface of the light panel is flush. In addition, a spacer having a thickness thicker than the light-emitting diode is additionally disposed on the light bar to prevent the light guide plate from directly contacting the light-emitting diode and being deformed by heat.

It can be seen that the conventional backlight module uses at least three different kinds of spacers, which leads to cumbersome assembly process of the backlight module, and increases operation cost, rework times and defect rate. Furthermore, different types of spacers need to be made using different molds, so the manufacturing cost is high. In addition, the spacers are independently disposed in the backlight module and are transported or used. The process is easy to fall off or damage, thereby affecting the stability of the overall structure of the backlight module.

Another conventional technique is to directly punch the bump on the light bar, and the bump can also prevent the light guide plate from directly contacting the light emitting diode and being deformed by heat. However, the method of such a hitting is not only difficult to manufacture, but also has a high defect rate. If the hitting fails, the entire light bar is scrapped, which may result in an increase in production cost.

Therefore, in one aspect of the present invention, a light source assembly and a backlight module are provided, and the integrally formed spacers are used to simultaneously limit the position of the light guide plate and to prevent the light guide plate from directly contacting the light emitting diode. Moreover, the integrally formed spacer not only saves manufacturing cost and man-hours, but also greatly reduces the time for assembling the backlight module and the number of rework. In addition, the method for combining the spacers on the light bar by using the first fixing member and the second fixing member can also improve the structural stability and reliability of the overall backlight module.

In accordance with the above objects of the present invention, a light source assembly is provided that includes a light strip and at least one spacer. The light bar includes a circuit board and a plurality of light emitting diodes. The light emitting diodes are disposed on the surface of the circuit board, and each of the light emitting diodes has a light emitting surface. The spacer is for fixing on the light bar. The spacer includes a base and at least one extension. The extension is erected on the base. The extension includes a first side and a second side opposite each other. The second side is in close contact with the surface of the board. The distance from the first side to the second side is greater than the distance from the light emitting surface to the surface of the circuit board.

According to an embodiment of the invention, the light bar further includes at least one first fixing member disposed on the circuit board, and the position of the first fixing member is offset from the position of the light emitting diode. The spacer further comprises at least one second fixing member disposed on the second surface and combined with the first fixing member.

According to another embodiment of the present invention, the extension portion includes at least two extension units respectively located between two adjacent light-emitting diodes.

According to still another embodiment of the present invention, the spacer further includes a recess located below the extension connecting base.

In accordance with still another embodiment of the present invention, the spacer further includes a boss on the second side opposite the base.

According to still another embodiment of the present invention, the spacer further comprises a backing and is disposed on the second surface.

According to the above object of the present invention, a backlight module is further provided, comprising a back plate, a light bar, a spacer and a light guide plate. The back plate has a light bar joint surface and a bottom surface. The light bar is disposed on the light bar bonding surface of the back plate, and includes a circuit board and a plurality of light emitting diodes. The light emitting diodes are disposed on a surface of the circuit board, and each of the light emitting diodes includes a light emitting surface. The spacer is for fixing on the light bar. The spacer includes a base and an extension. The base is disposed on the bottom surface of the backboard, and the extension is erected on the base. The extension includes a first side and a second side opposite each other. The second side is in close contact with the surface of the board. The distance from the first surface to the second surface is greater than the distance from the light emitting surface to the surface of the circuit board. The light guide plate includes a light incident surface. The light guide plate is opposite to the light emitting surface of the light emitting diode, and the side of the light guide plate adjacent to the light incident surface is disposed on the base.

According to an embodiment of the invention, the light bar further comprises at least one A fixing member is disposed on the circuit board, and the position of the first fixing member is offset from the position of the light emitting diode. The spacer further comprises at least one second fixing member disposed on the second surface and combined with the first fixing member.

According to another embodiment of the present invention, the extension portion includes at least two extension units respectively located between two adjacent light-emitting diodes.

According to still another embodiment of the present invention, the spacer further includes a recess located below the extension connecting base.

In accordance with still another embodiment of the present invention, the spacer further includes a boss on the second side opposite the base.

According to still another embodiment of the present invention, the spacer further comprises a backing and is disposed on the second surface.

100‧‧‧Backlight module

110‧‧‧ Backboard

110a‧‧‧Light bar joint

110b‧‧‧ bottom

120‧‧‧light strips

122‧‧‧ boards

122a‧‧‧ surface

124‧‧‧Lighting diode

124a‧‧‧Lighting surface

126‧‧‧First fixture

130‧‧‧Light source components

140‧‧‧ spacers

141‧‧‧Second fixture

142‧‧‧Base

143‧‧‧Extension

143a‧‧‧ first side

143b‧‧‧ second side

144‧‧‧back adhesive

145‧‧‧Extension unit

146‧‧‧ Groove

150‧‧‧Light guide plate

150a‧‧‧Glossy

240‧‧‧ spacers

241‧‧‧Second fixture

242‧‧‧Base

243‧‧‧Extension

243a‧‧‧ first side

243b‧‧‧ second side

244‧‧‧Boss

245‧‧‧Extension unit

340‧‧‧ spacers

341‧‧‧Second fixture

342‧‧‧Base

343‧‧‧Extension

343a‧‧‧ first side

343b‧‧‧ second side

345‧‧‧Extension unit

400‧‧‧Backlight module

410‧‧‧ Backplane

410a‧‧‧Light bar joint

410b‧‧‧ bottom

420‧‧‧Light strips

430‧‧‧Light source components

450‧‧‧Light guide plate

450a‧‧‧Glossy

D1‧‧‧ distance

D2‧‧‧ distance

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood. FIG. 1 is a schematic structural view of a backlight module according to an embodiment of the invention.

2 is a schematic structural view of a light source assembly according to an embodiment of the present invention.

3 is a structural exploded view of a light source assembly in accordance with an embodiment of the present invention.

4A through 4C are schematic views of several spacers in accordance with various embodiments of the present invention.

FIG. 5 is a schematic structural view of a backlight module according to another embodiment of the present invention.

Please refer to FIG. 1 and FIG. 2 , which are schematic diagrams showing the structure of a backlight module and a light source assembly according to an embodiment of the invention. The backlight module 100 of the present embodiment mainly includes a back plate 110, a light source assembly 130, and a light guide plate 150. The light source assembly 130 and the light guide plate 150 are disposed on the back plate 110 and are carried by the back plate 110. Moreover, the light source assembly 130 mainly includes a light bar 120 and at least one spacer 140. Wherein, as shown in FIG. 2, the length of the spacer 140 is smaller than the length of the light bar 120, and the spacer 140 is fixed on the light bar 120. In addition to the position of the spacer 140 for limiting the position of the light guide plate 150, the spacer 140 can also prevent the light incident surface 150a of the light guide plate 150 from directly contacting the light bar 120, thereby preventing the light guide plate 150 from being deformed by heat.

Please refer to FIG. 1 to FIG. 3 . FIG. 3 is a structural exploded view of a light source assembly according to an embodiment of the present invention. The back plate 110 of the embodiment shown in FIG. 1 has an L shape, but is not limited thereto. In this embodiment, the back plate 110 has a light bar bonding surface 110a and a bottom surface 110b. The light bar bonding surface 110a is perpendicular to the bottom surface 110b, and the light bar bonding surface 110a is directed to the light incident surface 150a of the light guide plate 150. The light bar 120 is disposed on the light bar bonding surface 110a of the back plate 110, and the light provided by the light bar 120 can enter the light guide plate 150 through the light incident surface 150a. As shown in FIG. 3, the light bar 120 includes a circuit board 122, a plurality of light emitting diodes 124, and at least one first fixing member 126. Luminous two The pole body 124 is disposed on one surface 122a of the circuit board 122 and electrically connected to the circuit board 122. The surface 122a is directed to the light incident surface 150a of the light guide plate 150. Moreover, each of the light emitting diodes 124 includes a light emitting surface 124a. These light-emitting surfaces 124a are equal in height to the light-incident surface 150a of the light guide plate 150.

As shown in FIG. 3, the first fixing member 126 is disposed on the circuit board 122. Moreover, the position of the first fixing member 126 is shifted from the position of the light emitting diode 124. The spacer 140 includes at least one second fixing member 141. The spacer 140 is fixed to the light bar 120 through the second fixing member 141. In an embodiment, the first fixing member 126 is a positioning hole, and the second fixing member 141 is a positioning post corresponding to the positioning hole. The spacer 140 is a slightly L-shaped structure, and the spacer 140 includes a base 142 and an extending portion 143.

In addition, as shown in FIG. 1 , the light guide plate 150 is supported by the back plate 110 , and the back plate 110 is provided with a convex portion to raise the light guide plate 150 , so that the light guide plate 150 and the light emitting diode 124 are equal in height. Moreover, the side of the light guide plate 150 near the light incident surface 150a is disposed on the base 142. Moreover, the base 142 is disposed on the bottom surface 110b of the back plate 110 and can limit the height of the light guide plate 150 to ensure that the light incident surface 150a of the light guide plate 150 can effectively and accurately align the light emitting surface 124a of the light emitting diode 124. Thereby, the backlight module 100 can be prevented from leaking light.

As shown in FIGS. 1 and 3, the extending portion 143 is erected on the base 142. The extension portion 143 has a first surface 143a and a second surface 143b, and the first surface 143a faces the second surface 143b. The first surface 143a is engaged with the base 142, and the second fixing member 141 is disposed on the second surface 143b. When the spacer 140 is coupled to the first fixing member 126 of the light bar 120 through the second fixing member 141, the second surface 143b of the spacer 140 is in close contact with the surface of the circuit board 122. 122a. Moreover, the distance D1 from the first surface 143a to the second surface 143b is greater than the distance D2 from the light emitting surface 124a to the surface 122a of the circuit board 122. That is, the thickness of the extension portion 143 is greater than the thickness of the light emitting diode 124. Thereby, the extending portion 143 can prevent the light guide plate 150 from being directly deformed or damaged by the contact with the light emitting diode 124. In an embodiment, the portion of the second surface 143b that is in contact with the circuit board 122 may be provided with a backing 144 to allow the spacer 140 to be more firmly bonded to the light bar 120.

The spacer structure of the present invention can have different variations. Please refer to FIG. 4A to FIG. 4C , which are respectively schematic diagrams of several spacers according to different embodiments of the present invention. In an embodiment, the extension 143 includes at least two extension units 145. When the number of the extension units 145 is two, the contour shape of the extension portion 143 is U-shaped. When the number of the extension units 145 is three, the contour shape of the extension portion 143 is an inverted E shape (as shown in FIG. 4A). Wherein, when the spacer 140 is fixed on the light bar 120, each extension unit 145 is located between two adjacent light emitting diodes 124. That is to say, the distance between the extension units 145 is designed according to the distance between two adjacent light-emitting diodes 124. Therefore, as shown in FIG. 2, when the spacer 140 is fixed to the light bar 120, the spacer 140 does not block the top surface of each of the light-emitting diodes 124. Moreover, since the length of the spacer 140 is less than the length of the light bar 120, at least a portion of the light emitting diodes 124 are located outside of the range of the single spacer 140. As shown in FIG. 4A, the spacer 140 has a recess 146 that is located below the location where the extension 143 is coupled to the base 142. In other embodiments, other spacers capable of limiting the light bar may be disposed in response to different widths of the light bar and different back plate structure requirements. In the recess 146, the light emitting surface 124a of the light emitting diode 124 can be aligned with the light incident surface 150a of the light guide plate 150.

In other embodiments, as shown in FIG. 4B, the spacer 240 includes a plurality of second fixing members 241, a base 242, an extending portion 243, and a boss 244. The extension portion 243 has a first surface 243a and a second surface 243b opposite to each other, and the extension portion 243 includes three extension units 245. The boss 244 is located on the second surface 243b and opposite to the base 242, that is, the boss 244 and the base 242 are respectively located on the second surface 243b and the first surface 243a of the extending portion 243. When the spacer 240 is fixed to the light bar, the boss 244 has the function of limiting the light bar. That is to say, the bottom surface of the light bar is reliably on the boss 244, so that the light emitting surface of the light emitting diode can be equal to the light incident surface of the light guide plate.

In still other embodiments, as shown in FIG. 4C, the spacer 340 includes a plurality of second fixing members 341, a base 342, and an extension portion 343. The extension portion 343 has opposite first and second faces 343a, 343b. The first surface 343a is engaged with the base 342, and the second fixing member 341 is disposed on the second surface 343b. Moreover, in these embodiments, the extension 343 includes three extension units 345.

Please refer to FIG. 4C and FIG. 5 simultaneously. FIG. 5 is a schematic structural diagram of a backlight module according to another embodiment of the present invention. The backlight module 400 of the embodiment shown in FIG. 5 also includes a back plate 410, a light source assembly 430, and a light guide plate 450. The light source assembly 430 and the light guide plate 450 are both disposed on the back plate 410 and carried by the back plate 410. Moreover, the light source assembly 430 mainly includes a light bar 420 and a spacer 340 shown in FIG. 4C. To be clear, the back plate 410 of the embodiment shown in FIG. 5 is a flat plate structure including a light bar bonding surface 410a and a bottom surface 410b. Moreover, the light bar bonding surface 410a is defined in The bottom surface 410b is adjacent to the light incident surface 450a of the light guide plate 450. In the present embodiment, the light bar 420 is directly disposed on the light bar bonding surface 410a of the back plate 410, and the spacer 340 is directly disposed on the bottom surface 410b of the back plate 410. Therefore, the spacer 340 does not need to have the recess 146 of the spacer 140 as shown in Fig. 4A, nor the boss 244 of the spacer 240 as shown in Fig. 4B. That is, when the spacer 340 is disposed on the light bar 420, the bottom surface of the base 342 and the extension portion 343 are flush with the bottom surface of the light bar 420.

Referring again to FIGS. 4A-4C, in some embodiments, the spacers 140, 240, and 340 can be designed in accordance with different light strips and backplane configurations. The spacers 140, 240, and 340 may be made of polycarbonate or rubber, and may be molded by a multi-hole mold and formed by injection molding to achieve rapid production.

It can be seen from the above embodiments of the present invention that the spacer formed by one of the present invention has a base and an extension portion, which can simultaneously limit the light guide plate and avoid the problem that the light guide plate is deformed due to direct contact with the light-emitting diode. Moreover, the integrally formed spacer not only saves manufacturing cost and man-hours, but also greatly reduces the time for assembling the backlight module and the number of rework. In addition, the method of combining the spacers on the light bar by using the first fixing member and the second fixing member can also improve the structural stability and reliability of the overall backlight module.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Backlight module

110‧‧‧ Backboard

110a‧‧‧Light bar joint

110b‧‧‧ bottom

120‧‧‧light strips

122‧‧‧ boards

122a‧‧‧ surface

124‧‧‧Lighting diode

124a‧‧‧Lighting surface

140‧‧‧ spacers

142‧‧‧Base

143‧‧‧Extension

143a‧‧‧ first side

143b‧‧‧ second side

150‧‧‧Light guide plate

150a‧‧‧Glossy

D1‧‧‧ distance

D2‧‧‧ distance

Claims (14)

A light source assembly comprising: a light bar comprising: a circuit board; and a plurality of light emitting diodes disposed on a surface of the circuit board, wherein each of the light emitting diodes comprises a light emitting surface; and at least a spacer for fixing to the light bar, wherein the spacer has a length smaller than a length of the light bar, and the spacer does not block a top surface of each of the light emitting diodes, the spacer includes a base; and at least one extension portion is erected on the base, the extension portion includes a first surface and a second surface opposite to each other, the second surface is in close contact with the surface of the circuit board, and the The distance from one side to the second side is greater than the distance from the light emitting surfaces to the surface of the circuit board. The light source assembly of claim 1, wherein the light bar further comprises at least one first fixing member disposed on the circuit board, and the position of the at least one first fixing member is offset from the positions of the light emitting diodes The spacer further includes at least one second fixing member disposed on the second surface and combined with the first fixing member. The light source assembly of claim 1, wherein the extending portion comprises at least two extending units respectively located between the two adjacent light emitting diodes. The light source assembly of claim 1, wherein the spacer further comprises a recess located below the extension connecting the base. The light source assembly of claim 1, wherein the spacer further comprises a boss on the second side opposite to the base. The light source assembly of claim 1, wherein the spacer further comprises a backing disposed on the second side. The light source assembly of claim 1, wherein at least a portion of the light emitting diode systems are outside the range of the at least one spacer. A backlight module includes: a back plate having a light bar bonding surface and a bottom surface; a light bar disposed on the light bar bonding surface of the back plate, and comprising: a circuit board; and a plurality of light emitting a pole body disposed on a surface of the circuit board, and each of the light emitting diodes includes a light emitting surface; at least one spacer member is fixed on the light bar, wherein the spacer has a length smaller than the lamp a length of the strip, and the spacer does not block a top surface of each of the light emitting diodes, the spacer comprises: a base disposed on the bottom surface of the back panel; at least one extension portion is erected on The extension portion includes a first surface and a second surface opposite to each other, the second surface is in close contact with the surface of the circuit board, and the distance from the first surface to the second surface is greater than the illumination The distance from the surface to the surface of the circuit board; and a light guide plate includes a light incident surface, the light guide plate is opposite to the light emitting surfaces of the light emitting diodes, and the light guide plate is adjacent to the light incident surface Side system setting On the base. The backlight module of claim 8, wherein the light bar further comprises at least one first fixing member disposed on the circuit board, and the position of the at least one first fixing member and the position of the light emitting diodes Staggering, the spacer further comprises at least one second fixing member disposed on the second surface and combined with the first fixing member. The backlight module of claim 8, wherein the extending portion comprises at least two extending units respectively located between the two adjacent light emitting diodes. The backlight module of claim 8, wherein the spacer further comprises a recess located below the extension connecting the base. The backlight module of claim 8, wherein the spacer further comprises a boss on the second surface opposite to the base. The backlight module of claim 8, wherein the spacer further comprises a backing disposed on the second surface. The backlight module of claim 8, wherein at least a portion of the light emitting diode systems are outside the range of the at least one spacer.