TW201430461A - Lighting module and backlight module - Google Patents

Abstract

A lighting module includes an LED light bar, a long conductive stick and a power PCB. The LED light bar includes a board and at least one LED, and at least one conductive pad and a circuit pattern is formed on the board. The circuit pattern connects the conductive pad and the LED electrically. The long conductive stick is disposed on the board and has a first end and a second end. The first end connects the conductive pad and the second end connects the power PCB electrically.

Description

Light source module and backlight module

The invention relates to a light source module, and in particular to a connection mode of a light source module light source.

FIG. 5 is a schematic diagram of a conventional backlight module. As shown in FIG. 5, in the backlight module 100, a plurality of LEDs 110 are disposed on the LED strip 102, and the connector 104 of the LED strip 102 is placed in the positioning slot of the backplane 106. 108 is positioned, and the LED strip 102 is attached to the side of the backing plate 106 by a thermal conductive tape (not shown) to be fixed to the backing plate 106. However, in the above assembly and positioning manner, the connector 104 needs to be aligned when being assembled into the backing plate 106, but the alignment process is likely to be offset, and the area in which the connector 104 is located cannot be provided with the light emitting diode 110. It will be displayed on the backlight module 100 as an optical dark area, which affects the optical quality of the area.

Other conventional designs, such as Taiwan Patent No. TWM379173, disclose a series-connected light-emitting diode element comprising a metal substrate, at least one light-emitting diode, and at least one encapsulation layer. The surface of the metal substrate is provided with a series circuit and an electrode contact, and the light emitting diode can directly connect the flexible wire at the electrode contact of the serial circuit, and the tail end of the flexible wire is provided with an electrical connector to be combined with another light. The polar body is electrically connected.

The invention provides a light source module and a backlight module which can reduce the generation of optical dark areas and simplify the assembly process.

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 module including a light emitting diode. A light bar, a conductive block, and a power circuit board. The light-emitting diode light bar is disposed adjacent to the position of the light guide plate, the light-emitting diode light bar comprises a substrate and at least one light-emitting diode, and the substrate has a first surface and a second surface opposite to the first surface, The at least one light emitting diode is disposed on the first surface of the substrate, and the substrate is formed with at least one conductive pad and a circuit pattern, and the circuit pattern is electrically connected to the conductive pad and the at least one light emitting diode. The conductive block is disposed on the substrate of the light-emitting diode strip, and has a first end and a second end, wherein the first end of the conductive block contacts the conductive pad and the second end is electrically connected to the power circuit board.

Another embodiment of the present invention provides a backlight module including a light guide plate and a light source module. The light source module includes a light emitting diode light bar, a conductive block, and a power circuit board. The light-emitting diode light bar is disposed adjacent to the position of the light guide plate, the light-emitting diode light bar comprises a substrate and at least one light-emitting diode, and the substrate has a first surface and a second surface opposite to the first surface, The at least one light emitting diode is disposed on the first surface of the substrate, and the substrate is formed with at least one conductive pad and a circuit pattern, and the circuit pattern is electrically connected to the conductive pad and the at least one light emitting diode. The conductive block is disposed on the substrate of the light-emitting diode strip, and has a first end and a second end, wherein the first end of the conductive block contacts the conductive pad and the second end is electrically connected to the power circuit board.

In an embodiment of the invention, a backplane is further included, and the backplane has at least one opening, wherein the LED strip is supported by the backplane and the conductive block passes through the opening to electrically connect the power circuit.

In an embodiment of the invention, the wall surface of the back plate opening may be coated with an insulating material.

In an embodiment of the invention, the light emitting diode light bar comprises a plurality of light emitting diodes, and the conductive pads are disposed between the two adjacent light emitting diodes.

In an embodiment of the invention, a heat sink is further disposed to abut against the second surface of the substrate.

In an embodiment of the invention, the conductive block has a first portion, a second portion and a connecting portion disposed opposite to each other, the first portion and the second portion have a spacing from each other, and the connecting portion connects the first portion and the second portion The first portion is electrically connected to the conductive pad, the second portion is attached to the heat sink, and the first portion and the second portion jointly sandwich the substrate and the heat sink.

In an embodiment of the invention, the conductive pads are on the first surface.

In an embodiment of the invention, the conductive block is interposed between the second surface of the substrate and the heat sink.

In an embodiment of the present invention, the second surface of the conductive block substrate is formed with a first recess, and the heat dissipating member is correspondingly formed with a second recess, and the conductive block is disposed in the first recess and the second recess to be disposed. Between the second surface of the substrate and the heat sink.

In an embodiment of the invention, the conductive block may have a base portion, a first protruding portion and a second protruding portion, the first groove corresponding to the outer shape of the first protruding portion and the second groove corresponding to the second portion The shape of the projection.

In an embodiment of the invention, the wall surfaces of the first groove and the second groove may be coated with an insulating material.

In an embodiment of the invention, the conductive pads are located in the first recess.

In an embodiment of the invention, the power circuit board has a power socket, and the second end of the conductive block is inserted into the power socket to electrically connect the power circuit board.

In an embodiment of the invention, the second end of the conductive block is a columnar structure or a needle-like structure.

In an embodiment of the invention, the second end of the conductive block of the conductive block is a hollow cylindrical plug.

In summary, the embodiment of the present invention has at least one of the following advantages: by the design of each of the above embodiments, the LED can be assembled and electrically connected by simply inserting the conductive block into the power socket. The effect of the power board eliminates the need for additional component alignment steps, which simplifies the assembly process of the light source module. Furthermore, the design of each of the above embodiments can omit the conventional connector member, so that the generation of the optical dark area can be further reduced, and the space generated by the connector can be omitted to perform other optical layouts, for example, the space can be additionally used to provide illumination. The diode is further improved in light uniformity.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein. The above and other objects, features, and advantages of the present invention will become more apparent and understood. under.

10, 100‧‧‧ backlight module

12‧‧‧Light guide plate

14, 102‧‧‧Lighting diode strips

14a‧‧‧Substrate

14b‧‧‧Lighting diode

14c‧‧‧ first surface

14d‧‧‧second surface

16‧‧‧ Heat sink

18‧‧‧Electrical block

181, ‧ ‧ ‧ first end

182, 282‧‧‧ second end

18a‧‧‧Electrical block base

18b‧‧‧first bump of the conductive block

18c‧‧‧second bump of conductive block

22, 106‧‧‧ Backplane

22a‧‧‧ Back panel opening

24‧‧‧Power circuit board

24a‧‧‧Power socket

24b‧‧‧ hollow cylindrical bulge

26‧‧‧ Thermal Tape

28‧‧‧Electrical block

28a‧‧‧The first part of the conductive block

28b‧‧‧The second part of the conductive block

28c‧‧‧Connecting Department

32‧‧‧Shrap

104‧‧‧Connector

C‧‧‧ circuit pattern

H‧‧‧ conductive through hole

P‧‧‧Electrical pads

M, N, R‧‧‧ grooves

FIG. 1a is a cross-sectional view of a light source module according to an embodiment of the invention.

FIG. 1b is a cross-sectional view of a backlight module according to an embodiment of the invention.

2 is a schematic view of a conductive block in accordance with an embodiment of the present invention.

3A and 3B are schematic views of a conductive block according to another embodiment of the present invention.

4 is a schematic view showing a state in which a conductive block and a power supply socket are joined to each other according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a conventional backlight module.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the embodiments of the invention. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only directions referring to the additional drawings. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

1a is a schematic diagram of a light source module according to an embodiment of the invention, and FIG. 1b is a schematic diagram of a backlight module according to an embodiment of the invention. Referring to FIG. 1a and FIG. 1b , a light source module 10 includes a light-emitting diode light strip 14 , a heat sink 16 , a conductive block 18 , and a power circuit board 24 . In FIG. 1 b , a backlight module 100 includes a light guide plate 12 and a light source module 10 . The light source module 10 includes a light emitting diode strip 14 , a heat sink 16 , a conductive block 18 , and a power circuit board 24 . . The light-emitting diode strip 14 is disposed adjacent to the position of the light guide plate 12 and includes a substrate (for example, a circuit board) 14a and at least one light-emitting diode 14b. The substrate 14a has a first surface 14c and a first surface. The second surface 14d of the 14c, the light emitting diode 14b is disposed on the first surface 14c of the substrate 14a, and the substrate 14a is formed with at least one conductive pad P and a circuit pattern C, and the circuit pattern C is electrically connected to the conductive pad P And the light emitting diode 14b. In detail, the circuit pattern C includes a conductive via H through the first surface 14c and the second surface 14d of the substrate 14a, and the conductive via H is electrically connected to the conductive pad P. The heat sink 16 is disposed on the back plate 22 and abuts the light emitting diode The light bar 14 is disposed on the substrate 14a of the LED strip 14 and has a first end 181 and a second end 182. For example, the second surface 14d and the heat sink 16 can be sandwiched between the substrate 14a. between. The back plate 22 bears against the heat sink 16 and the LED strip 14 to limit the heat sink 16 and the LED strip 14 . The heat sink 16 and the LED strip 14 can be fixed to the backboard 22 by a thermal tape 26. The back plate 22 has at least one opening 22a. The first end 181 of the conductive block 18 contacts the conductive pad P formed on the substrate 14a to electrically connect the light emitting diode 14b, and the second end 182 of the conductive block 18 is electrically connected to the back end. Power circuit board 24. In detail, the conductive block 18 passes through the opening 22a of the back plate 22 to electrically connect to the power circuit board 24.

2 is a schematic view of a conductive block in accordance with an embodiment of the present invention. The shape of the conductive block is not limited. As shown in FIG. 2, the conductive block 18 has an elongated base portion 18a and a first protruding portion 18b and a second protruding portion 18c protruding from both sides of the base portion 18a. The substrate of the LED strip 14 The second surface 14d of the 14a can form a groove M corresponding to the outer shape of the first protruding portion 18b, and the heat dissipating member 16 can form a groove N corresponding to the outer shape of the second protruding portion 18c, and the conductive block 18 is placed into the groove M. N is interposed between the second surface 14d of the substrate 14a of the light-emitting diode strip 14 and the heat sink 16. The conductive pad P is located in the first groove M in electrical contact with the conductive block 18 . The circuit pattern C is electrically connected to the conductive pad P and the at least one light emitting diode 14b. In detail, the circuit pattern C includes a conductive via H through the first surface 14c and the second surface 14d of the substrate 14a, and the conductive via H is electrically connected to the conductive pad P. The second end 182 of the conductive block 18 can be inserted into the power socket 24a of the power circuit board 24 through the opening 22a of the backboard 22 as shown in FIG. 1 to electrically connect the conductive block 18 to the power circuit board 24. The second end 182 of the conductive block 18 can be a columnar structure or a needle-like structure. This embodiment is a columnar structure.

In this embodiment, the conductive block 18 is interposed between the second surface 14d of the substrate 14a and the heat sink 16. In another embodiment, if the heat sink 16 is not provided, the conductive block 18 may be directly bonded or snapped. The conductive block 18 is disposed on the second surface 14d of the substrate 14a of the light-emitting diode strip 14, and the substrate 14a is directly fixed to the back plate 22 by a thermal conductive tape 26 (not shown). Furthermore, the walls of the grooves M, N and the back plate opening 22a may be coated with an insulating material to keep the conductive block 18 from the heat sink 16 and the back plate 22 in an insulated state.

3A and 3B are schematic views of a conductive block according to another embodiment of the present invention. Referring to FIG. 3A and FIG. 3B, the first surface 14c of the substrate 14a of the LED strip 14 is provided with a conductive pad P. The circuit pattern C is electrically connected to the conductive pad P and the at least one light emitting diode. Body 14b. In an embodiment, the substrate 14a and the heat sink 16 may also be formed with a recess R corresponding to the contour of the conductive block 28 to enable the conductive block 28 to be more stably fixed to the LED strip 14 . Limit it. The conductive block 28 has a first portion 28a, a second portion 28b and a connecting portion 28c. The first portion 28a and the second portion 28b are oppositely disposed and have a spacing from each other. The connecting portion 28c connects the first portion 28a and the second portion 28c. When the connecting portion 28c of the conductive block 28 is placed in the recess R, the first portion 28a of the conductive block 28 and the second portion 28b sandwich the substrate 14 and the heat sink 16. In detail, the first portion 28a of the conductive block 28 can be attached to the first surface 14c of the substrate 14a, and the bottom end of the first portion 28a, that is, the first end 281 of the conductive block 28 can be contacted on the first surface 14c. The conductive pads P between the two adjacent light-emitting diodes 14b electrically connect the conductive blocks 28 to the light-emitting diodes 14b. The second portion 28b can be attached to one side of the heat sink 16, and the second end 282 of the second portion 28b can pass through the opening 22a of the back plate 22 and be embedded in the power socket 24a of the power circuit board 24 as shown in FIGS. 1a, 1b. So that the conductive block 28 is electrically connected to the power circuit board 24. The second end 282 of the conductive block 28 of the present embodiment has a needle-like structure. In another embodiment, the heat sink 16 may be omitted and the first portion 28a and the second portion 28b of the conductive block 28 are respectively attached to the first surface 14c and the second surface 14d of the substrate 14a, and electrically connected to the light emitting diodes respectively. Body 14b and power circuit board 24.

In the design of each embodiment of the present invention, the structural form and connection manner of the conductive block and the power socket are not limited. For example, as shown in FIG. 4, the second end 182 of the conductive block 18 can be a hollow cylindrical plug, and the power socket 24a has a hollow cylindrical protrusion 24b. The inner diameter of the second end 182 of the conductive block 18 is slightly larger than the outer diameter of the hollow cylindrical projection 24b of the power supply socket 24a to facilitate insertion into the power supply socket 24a. Furthermore, an auxiliary structure such as a metal dome 32 may be provided. The metal dome 32 may abut the second end 182 to further ensure the bonding action and electrical connection between the conductive block 18 and the power socket 24a.

With the design of each of the above embodiments, the light-emitting diode strip 14 can be assembled and electrically connected to the power supply circuit only by inserting the conductive block 18 into the power socket 24a. The effect of the board 24 eliminates the need for additional component alignment steps, thereby simplifying the assembly process of the light source module. Furthermore, the design of each of the above embodiments can omit the conventional connector member, so that the generation of the optical dark area can be further reduced, and the space generated by the connector can be omitted to perform other optical layouts, for example, the space can be additionally used to provide illumination. The diode is further improved in light uniformity.

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. The terms "first", "second", and the like, as used in the specification or the claims, are used to refer to the names of the elements, and are not intended to limit the upper or lower limit of the number of elements.

10‧‧‧Light source module

12‧‧‧Light guide plate

14‧‧‧Lighting diode strip

14a‧‧‧Substrate

14b‧‧‧Lighting diode

16‧‧‧ Heat sink

18‧‧‧Electrical block

22‧‧‧ Backplane

22a‧‧‧ Back panel opening

24‧‧‧Power circuit board

24a‧‧‧Power socket

26‧‧‧ Thermal Tape

P‧‧‧Electrical pads

Claims (26)

A light source module includes: a light-emitting diode light strip disposed adjacent to the light guide plate, the light-emitting diode light strip includes a substrate and at least one light-emitting diode, and the substrate has a first surface And the at least one light emitting diode is disposed on the first surface of the substrate, and the substrate is formed with at least one conductive pad and a circuit pattern, and the circuit pattern is electrically The conductive pad and the at least one light emitting diode are connected to the substrate; the conductive block is disposed on the substrate of the light emitting diode strip and has a first end and a second end; and a power circuit board, wherein The first end of the conductive block contacts the conductive pad and the second end is electrically connected to the power circuit board. The light source module of claim 1, further comprising a backing plate, wherein the backing plate has at least one opening, wherein the light emitting diode light strip bears against the backing plate and the conductive block passes through the opening The power circuit board is electrically connected. The light source module of claim 2, wherein the wall surface of the opening of the backing plate is coated with an insulating material. The light source module of claim 1, wherein the light-emitting diode light bar comprises a plurality of light-emitting diodes, and the conductive pads are disposed between two adjacent light-emitting diodes. The light source module of claim 1, further comprising a heat sink against the second surface of the substrate. The light source module of claim 5, wherein the conductive block has a first portion, a second portion and a connecting portion disposed opposite to each other, the first portion and the second portion have a spacing from each other, the connecting portion Connecting the first portion and the second portion, the first portion is electrically connected to the conductive pad, the second portion is attached to the heat sink, and the first portion and the second portion jointly sandwich the substrate and The heat sink. The light source module of claim 6, wherein the conductive pad is located on the first surface. The light source module of claim 5, wherein the conductive block is sandwiched between the second surface of the substrate and the heat sink. The light source module of claim 8, wherein the second surface of the substrate is formed with a first recess, the heat dissipating member is correspondingly formed with a second recess, and the conductive block is disposed in the first recess and the The second groove is interposed between the second surface of the substrate and the heat sink. The light source module of claim 9, wherein the conductive block has a base portion, a first protrusion portion and a second protrusion portion, the first groove corresponding to the shape of the first protrusion portion and the first portion The two grooves correspond to the shape of the second projection. The light source module of claim 9, wherein the walls of the first groove and the second groove are coated with an insulating material. The light source module of claim 11, wherein the conductive pad is located in the first recess. The light source module of claim 2, further comprising a heat sink member that abuts the second surface of the substrate. The light source module of claim 13, further comprising: a thermal conductive tape for fixing the heat sink to the backboard. Conductive block The light source module of claim 1, wherein the power circuit board has a power socket, and the second end of the conductive block is inserted into the power socket to electrically connect the power circuit board. The light source module of claim 1, wherein the second end of the conductive block is a columnar structure or a needle-like structure. The light source module of claim 1, wherein the second end of the conductive block is a hollow cylindrical plug. A backlight module includes: a light guide plate; and a light source module, wherein the light source module comprises: a light emitting diode light strip disposed adjacent to the light guide plate, the light emitting diode light strip comprises a substrate and at least one light emitting diode, wherein the substrate has a first surface and a second surface opposite to the first surface, the at least one light emitting diode is disposed on the first surface of the substrate, and The substrate is formed with at least one conductive pad and a circuit pattern, the circuit pattern is electrically connected to the conductive pad and the at least one light emitting diode; a conductive block is disposed on the substrate of the light emitting diode light bar and The first end and the second end; and a power circuit board, wherein the first end of the conductive block contacts the conductive pad and the second end is electrically connected to the power circuit board. The backlight module of claim 18, further comprising a heat sink against the second surface of the substrate. The backlight module of claim 19, wherein the conductive block has a first portion, a second portion and a connecting portion disposed opposite to each other, the first portion and the second portion having a spacing from each other, the connecting portion Connecting the first portion and the second portion, the first portion is electrically connected to the conductive pad, the second portion is attached to the heat sink, and the first portion and the second portion jointly sandwich the substrate and The heat sink. The backlight module of claim 20, wherein the conductive pad is located on the first surface. The backlight module of claim 19, wherein the conductive block is sandwiched between the second surface of the substrate and the heat sink. The backlight module of claim 22, wherein the second surface of the substrate is shaped Forming a first recess, the heat sink is correspondingly formed with a second recess, and the conductive block is disposed in the first recess and the second recess to be disposed on the second surface of the substrate and the heat sink between. The backlight module of claim 23, wherein the conductive block has a base portion, a first protrusion portion and a second protrusion portion, the first groove corresponding to the shape of the first protrusion portion and the first portion The two grooves correspond to the shape of the second projection. The backlight module of claim 23, wherein the conductive pad is located in the first recess. The backlight module of claim 18, wherein the power circuit board has a power socket, and the second end of the conductive block is inserted into the power socket to electrically connect the power circuit board.