CN111947056B - Lamp strip, backlight unit and display device - Google Patents

Abstract

The invention discloses a light bar, a backlight module and a display device, wherein the light bar comprises: a PCB board; the limiting electrode mechanism is arranged on the PCB and comprises a positive foil electrode and a negative foil electrode; and the connector is connected to the PCB, one end of the connector is used for being externally connected with a power supply circuit, and the other end of the connector is electrically connected with the limiting electrode mechanism. The limiting electrode mechanism is arranged on the positive foil electrode and the negative foil electrode on the PCB, so that a first connecting seat which is welded on the PCB of the light bar and comprises an injection molding seat body in the prior art is replaced, and the positive foil electrode and the negative foil electrode of the metal foil only extend out of the PCB, so that an injection molding shell is omitted, the cost is reduced, the welding process is omitted, and the yield of the light bar is increased; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism, so that power supply to the lamp strip is realized.

Description

Lamp strip, backlight unit and display device

Technical Field

The invention relates to the technical field of light bars, in particular to a light bar, a backlight module and display equipment.

Background

In the prior art, a light bar is usually connected to an external power supply circuit by providing a power supply structure, and the current power supply structure usually includes a first connector (a female socket or a male socket) provided on the light bar and a second connector (a male socket or a female socket) additionally provided, and the first connector is electrically connected to an internal circuit of the light bar, and the second connector is electrically connected to an external power supply circuit through the light bar wire; however, the first connector and the second connector usually comprise an injection molded base, which increases the cost of the light bar; the first connector arranged at the end of the lamp strip needs to be welded on a PCB of the lamp strip through welding processing to be fixed on the lamp strip, and the first connector is electrically connected, so that the manufacturing procedures of the lamp strip are increased, and the yield of the lamp strip is reduced.

Therefore, how to provide a light bar with a power supply structure having low cost and high yield is an urgent technical problem to be solved.

Disclosure of Invention

The invention provides a light bar, a backlight module and a display device, aiming at solving the technical problems of high cost and low yield of a power supply structure of the light bar in the prior art.

The technical scheme adopted by the invention for solving the technical problem is as follows: a light bar, comprising:

a PCB board;

the limiting electrode mechanism is arranged on the PCB and comprises a positive foil electrode and a negative foil electrode;

and the connector is connected to the PCB, one end of the connector is used for externally connecting a power supply circuit, and the other end of the connector is electrically connected with the limiting electrode mechanism.

Further, the connector includes:

a connecting seat;

the power supply terminal is arranged on the connecting seat, one end of the power supply terminal is used for being externally connected with a power supply circuit, and the other end of the power supply terminal is used for being electrically connected with the limiting electrode mechanism;

the connecting seat is used for detachably connecting the power terminal to the PCB.

Further, the connection socket includes:

a connecting seat body;

the terminal fixing groove is formed in the connecting seat body and used for accommodating and fixing the power supply terminal;

the lamp strip connecting piece, the lamp strip connecting piece set up in the connecting seat body deviates from the one end of terminal fixed slot for connect the PCB board of lamp strip.

Furthermore, the power supply terminal is provided with a light bar line with a metal electrode and comprises a power supply positive terminal and a power supply negative terminal, and the terminal fixing grooves comprise a first terminal fixing groove and a second terminal fixing groove which are arranged in an L shape; the positive terminal of the power supply is fixed in the first terminal fixing groove and corresponds to the position of the positive foil electrode, and the negative terminal of the power supply is fixed in the second terminal fixing groove and corresponds to the position of the negative foil electrode;

the power supply positive terminal and the power supply negative terminal are arranged to be L-shaped elastic electrodes, the power supply positive terminal is in interference fit with the positive foil electrode, and the power supply negative terminal is in interference fit with the negative foil electrode.

Furthermore, the light bar connecting piece is arranged as a clamping piece and comprises a first clamping plate and a second clamping plate which extend from the width direction of the connecting seat body, and the first clamping plate and the second clamping plate are arranged at intervals along the height direction of the connecting seat body;

the first clamping plate and the second clamping plate are matched, clamped and fixed on the PCB.

Furthermore, a first bending plate facing the second clamping plate is arranged at the end part, away from the connecting seat body, of the first clamping plate;

the limiting electrode mechanism is arranged at one end of the PCB in the width direction, and the first bending plate is buckled at the other end of the PCB in the width direction.

Furthermore, the end part of the first bending plate along the thickness direction of the PCB is provided with a chamfer or a fillet;

the limiting electrode mechanism also comprises a limiting slotted hole which is arranged along the thickness direction of the PCB, and the limiting slotted hole is arranged in a straight line with the positive foil electrode and the negative foil electrode along the width direction of the PCB;

when the power supply terminal is electrically connected with the anode foil electrode and the cathode foil electrode, the first bending plate is clamped in the limiting slotted hole.

Furthermore, the light bar connecting piece is arranged to be a fixed groove structure, the limiting electrode mechanism further comprises a lug matched with the fixed groove structure, the lug extends and is formed from the end part of the PCB in the length direction, and the positive foil electrode and the negative foil electrode are arranged on the lug;

or the lamp strip connecting piece is arranged into a fixed groove structure, and the limiting electrode mechanism further comprises a convex block matched with the fixed groove structure; the lug is arranged on the PCB and is flush with the end face of the PCB in the width direction, the two sides of the lug in the length direction are concavely provided with limit grooves, and the positive foil electrode and the negative foil electrode are arranged on the lug.

The invention adopts another technical scheme for solving the technical problem as follows: a backlight module comprises the light bar.

The invention adopts another technical scheme for solving the technical problem as follows: a display device comprising a light bar as described above.

Compared with the prior art, the light bar, the backlight module and the display device provided by the invention have the advantages that the light bar comprises: a PCB board; the limiting electrode mechanism is arranged on the PCB and comprises a positive foil electrode and a negative foil electrode; and the connector is connected to the PCB, one end of the connector is used for externally connecting a power supply circuit, and the other end of the connector is electrically connected with the limiting electrode mechanism. It can be understood that the limiting electrode mechanism is arranged on the positive foil electrode and the negative foil electrode (metal foil, such as copper foil) on the PCB, so that the first connecting seat comprising the injection molding seat body in the prior art, which is welded on the PCB of the light bar, is replaced, and the positive foil electrode and the negative foil electrode of the metal foil extend out of the PCB only, so that an injection molding shell is omitted, the cost is reduced, the welding process is omitted, and the yield of the light bar is increased; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism, so that power supply to the lamp strip is realized.

Drawings

Fig. 1 is a schematic perspective view of a light bar provided in the present invention;

fig. 2 is a perspective exploded view of the light bar provided in the present invention;

FIG. 3 is a schematic top view of a light bar provided in the present invention;

FIG. 4 is a schematic sectional view taken along line I-I of FIG. 3 according to the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4 in accordance with the present invention;

FIG. 6 is an enlarged view of portion B of FIG. 4 in accordance with the present invention;

fig. 7 is a schematic view of a preferred deformed three-dimensional structure of the light bar provided in the present invention;

fig. 8 is a perspective exploded view of a preferred variant of the light bar provided in the present invention;

FIG. 9 is a schematic top view of a preferred variant of the light bar provided in the present invention;

FIG. 10 is a schematic sectional view taken along line II-II of FIG. 9 in accordance with the present invention;

fig. 11 is a schematic view of another preferred deformed three-dimensional structure of the light bar provided in the present invention;

fig. 12 is a schematic top view of another preferred variant of the light bar provided in the present invention;

FIG. 13 is a schematic view in cross section taken in the direction III-III of FIG. 12 in accordance with the present invention;

FIG. 14 is an enlarged view of section C of FIG. 13 in accordance with the present invention;

FIG. 15 is a schematic view in section taken along the line IV-IV of FIG. 12 according to the invention;

description of reference numerals:

10. a light bar; 11. a PCB board; 12. a limiting electrode mechanism; 13. a connector; 14. a connecting seat; 15. a power supply terminal; 121. a positive foil electrode; 122. a negative foil electrode; 123. limiting slotted holes; 124. a bump; 125. a limiting groove; 141. a connecting seat body; 142. a terminal fixing groove; 143. a light bar connector; 1421. a first terminal fixing groove; 1422. a second terminal fixing groove; 1431. a first clamping connection plate; 1432. a second clamping plate; 1433. a first bending plate; 1434. chamfering; 1435. a fixed slot structure; 1436. a second bending plate; 151. a power supply positive terminal; 152. and a negative terminal of the power supply.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not delimit the invention.

At present, a light bar is often connected to an external power supply circuit by providing a power supply structure, and the current power supply structure generally includes a first connector (a female socket or a male socket) provided on the light bar and a second connector (a male socket or a female socket) additionally provided, and the first connector is electrically connected to an internal circuit of the light bar, and the second connector is electrically connected to an external power supply circuit through a light bar wire; however, the first connector and the second connector usually comprise an injection molded base, which increases the cost of the light bar; and set up the first connector at the lamp strip end, need through welding process, just can be fixed in on the lamp strip to the electricity is connected first connector, this manufacturing procedure that has just increased the lamp strip causes the decline of lamp strip yields. The invention provides a lamp strip based on the problems of high cost and high yield of a power supply structure of the lamp strip, wherein a limiting electrode mechanism is arranged on a positive foil electrode and a negative foil electrode on a PCB (printed circuit board), so that the problem that the limiting electrode mechanism is welded on the PCB of the lamp strip in the prior art is replaced, a first connecting seat comprising an injection molding seat body is provided, and the positive foil electrode and the negative foil electrode of a metal foil (copper foil) only extend out of the PCB, so that an injection molding shell is omitted, the cost is reduced, a welding processing procedure is omitted, and the yield of the lamp strip is increased; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism, so that power supply to the lamp strip is realized.

Referring to fig. 1 and fig. 2, in a first embodiment of the present invention, a light bar 10 is provided, which includes: the device comprises a PCB (printed circuit board) 11, a limiting electrode mechanism 12 and a connector 13, wherein the limiting electrode mechanism 12 is arranged on the PCB 11 and comprises a positive foil electrode 121 and a negative foil electrode 122; the limiting electrode mechanism 12 is arranged on the PCB 11, and the limiting electrode mechanism 12 includes a positive foil electrode 121 and a negative foil electrode 122; the connector 13 is connected to the PCB 11, one end of the connector 13 is used for connecting an external power supply circuit, and the other end of the connector 13 is electrically connected to the limiting electrode mechanism 12.

It can be understood that, by disposing the limiting electrode mechanism 12 on the positive foil electrode 121 and the negative foil electrode 122 (an external bare metal foil, such as a copper foil) on the PCB 11, the prior first connecting seat 14 including an injection molding seat body replaces the prior art that is welded on the PCB 11 of the light bar 10, and only the positive foil electrode 121 and the negative foil electrode 122 of the metal foil (copper foil) extend from the PCB 11, so that an injection molding shell is omitted, the cost is reduced, the welding process is omitted, and the yield of the light bar 10 is increased; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism 12, so that power supply to the lamp strip 10 is realized.

In some preferred embodiments, the connector 13 comprises: a connecting socket 14 and a power supply terminal 15; the power supply terminal 15 is arranged on the connecting seat 14, one end of the power supply terminal 15 is used for being externally connected with a power supply circuit, and the other end of the power supply terminal 15 is used for being electrically connected with the limiting electrode mechanism 12; the connecting socket 14 is used for detachably connecting the power terminal 15 to the PCB board 11.

It can be understood that the connecting seat 14 can bear the power terminal 15, and can fix and assemble the power terminal 15 on the PCB 11, so as to ensure that the power terminal 15 is electrically connected to the limiting electrode mechanism 12, and further ensure that the connector 13 can supply power to the light bar 10.

Referring further to fig. 3 and 4, in other preferred embodiments, the connecting section 14 includes: a connector body 141, a terminal fixing groove 142 and a light bar connector 143; the terminal fixing groove 142 is opened on the connecting seat body 141, and the terminal fixing groove 142 is used for accommodating and fixing the power terminal 15; the light bar connector 143 is disposed at an end of the connecting socket body 141 away from the terminal fixing groove 142, and is configured to connect the PCB 11 of the light bar 10.

It can be understood that the terminal fixing grooves 142 and the light bar connectors 143 are disposed at two ends of the connector base body 141, the light bar connectors 143 are detachably mounted on the PCB 11, and then the connector base body 141 and the terminal fixing grooves 142 are connected to the PCB 11, and when the light bar connectors 143 are mounted on the PCB 11, the terminal fixing grooves 142 are located at the position of the limiting electrode mechanisms 12, and then the terminal fixing grooves 142 fix the power terminals 15 on the PCB 11, so as to ensure that the power terminals 15 are in contact with and matched with the limiting electrode mechanisms 12, thereby supplying power to the light bars 10.

In some preferred embodiments, the power supply terminal 15 is provided with a light bar wire with a metal electrode; the power terminal 15 includes a positive power terminal 151 and a negative power terminal 152, the terminal fixing groove 142 includes a first terminal fixing groove 1421 and a second terminal fixing groove 1422, and the first terminal fixing groove 1421 and the second terminal fixing groove 1422 are arranged in an L shape; the power positive terminal 151 is fixed in the first terminal fixing groove 1421 and corresponds to the position of the positive foil electrode 121; the negative power terminal 152 is fixed in the second terminal fixing groove 1422 and corresponds to the position of the negative foil electrode 122.

It can be understood that, by setting the power supply terminal 15 as a light bar wire with a metal electrode, the power supply for the light bar 10 can be ensured, and the cost of the connector 13 is reduced, so that the cost of the light bar 10 is reduced.

In other preferred embodiments, the power positive terminal 151 and the power negative terminal 152 are provided as L-shaped elastic electrodes; the positive power terminal 151 is in interference fit with the positive foil electrode 121, and the negative power terminal 152 is in interference fit with the negative foil electrode 122. It should be noted that the interference fit between the positive power terminal 151 and the positive foil electrode 121 includes a zero-clearance fit; the power negative terminal 152 interference fit with the negative foil electrode 122 also includes a zero-clearance fit; it is understood that the positive power terminal 151 and the positive foil electrode 121, and the negative power terminal 152 and the negative foil electrode 122 are in contact fit; the connection stability between the power supply terminal 15 and the connection socket 14 is improved by arranging the power supply positive terminal 151 and the power supply negative terminal 152 as L-shaped elastic electrodes; and the power supply positive terminal 151 is in interference fit with the positive foil electrode 121, and the power supply negative terminal 152 is in interference fit with the negative foil electrode 122, so that the power supply terminal 15 is ensured to be contacted and supplies power to the limiting electrode mechanism 12.

In some preferred embodiments, the light bar connecting member 143 is configured as a clip member, that is, the light bar connecting member 143 is clipped on the PCB 11; specifically, the light bar connector 143 includes a first clamping plate 1431 and a second clamping plate 1432 extending from the connector holder body 141 in the width direction, and the first clamping plate 1431 and the second clamping plate 1432 are arranged at intervals along the height direction of the connector holder body 141; the first clamping plate 1431 and the second clamping plate 1432 are clamped and fixed on the PCB 11. It can be understood that the thickness of the PCB 11 is smaller than the interval between the first clamping plate 1431 and the second clamping plate 1432 along the height direction of the connector holder body 141, and the light bar connecting piece 143 is set as a clamping piece, so that the connector 13 is conveniently assembled on the PCB 11, the production process of the light bar 10 is simplified, and the yield of the light bar 10 is improved.

Referring further to fig. 5 and 6, in some preferred embodiments, the end of the first clamping plate 1431 facing away from the connector holder body 141 is provided with a first bending plate 1433 facing the second clamping plate 1432; the limiting electrode mechanism 12 is disposed at one end of the PCB 11 in the width direction, and the first bending plate 1433 is fastened at the other end of the PCB 11 in the width direction. Specifically, the limiting electrode mechanism 12 is disposed at one side of the PCB 11 in the width direction, and the first bending plate 1433 is fastened to the other side of the PCB 11 in the width direction. Therefore, the lamp strip is quickly and detachably mounted on the PCB 11, and the power supply terminal 15 can be electrically connected with the limiting electrode mechanism 12 to display power supply to the lamp strip 10.

In other preferred embodiments, an end of the first bending plate 1433 in a thickness direction of the PCB board 11 is provided with a chamfer 1434 or a round corner; it can be understood that, by providing a chamfer 1434 or a fillet at the end of the first bending plate 1433 along the thickness direction of the PCB 11, when the light bar connector 143 is clamped on the PCB 11, the operation is more convenient and faster.

Referring to fig. 7 to 10, in another preferred embodiment, the position limiting electrode mechanism 12 further includes a position limiting slot 123 formed along the thickness direction of the PCB 11, and the position limiting slot 123 is disposed in a shape of a straight line with the positive foil electrode 121 and the negative foil electrode 122 along the width direction of the PCB 11; it can be understood that the limiting slot 123, the positive foil electrode 121 and the negative foil electrode 122 are disposed in a straight line in the width direction of the PCB 11, and when the power terminal 15 is electrically connected to the positive foil electrode 121 and the negative foil electrode 122, the first bending plate 1433 is snapped in the limiting slot 123.

It can be understood that, when the width dimension of the PCB 11 is small, the light bar connector 143 can be disposed on an end surface of the PCB 11 in the width direction; when the width of the PCB 11 is small, the limiting electrode mechanism 12 is further provided with a limiting slot 123, the limiting slot 123 is formed in the position of the PCB 11 in the width direction, and the light bar 10 is clamped on the limiting slot 123 on the PCB 11; and the two fixing positions can be realized by only adjusting the extension length of the light bar connecting piece 143.

Further, a second bending plate 1436 facing the first clamping plate 1431 is disposed at an end of the second clamping plate 1432 facing away from the connecting socket body 141; further, an end of the second bending plate 1436 in a thickness direction of the PCB is also provided with a chamfer 1434 or a fillet; it can be understood that, by providing the second bending plate 1436 on the second clamping plate 1432, the connection strength of the connecting seat 14 to the PCB 11 is further improved.

Referring to fig. 11 to 15, in another preferred embodiment, the light bar connector 143 is configured as a fixing groove structure 1435, the position limiting electrode mechanism 12 further includes a protrusion 124 matching with the fixing groove structure 1435, the protrusion 124 extends from the end of the PCB 11 in the length direction, and the positive foil electrode 121 and the negative foil electrode 122 are disposed on the protrusion 124. It can be understood that the position limiting electrode mechanism 12 includes a protrusion extending from an end of the protrusion 124, which is connected to the PCB 11, with respect to the length direction of the PCB 11, and the protrusion 124 is inserted into the fixing groove structure 1435 to complete the installation of the power supply structure of the light bar 10, so that the stability of the light bar 10 is improved, the production cost of the light bar 10 is reduced, and further, the protrusion 124 is in interference fit with the fixing groove structure 1435.

In other preferred embodiments, the light bar connector 143 is configured as a fixing groove structure 1435, the position limiting electrode mechanism 12 further includes a protrusion 124 matched with the fixing groove structure 1435, the protrusion 124 is disposed on the PCB 11 and is flush with the end surface of the PCB 11 in the width direction, two sides of the protrusion 124 in the length direction are recessed with a limiting groove 125, and the positive foil electrode 121 and the negative foil electrode 122 are disposed on the protrusion 124. It can be understood that the protruding block 124 is in interference fit with the fixing groove structure 1435, when the connector 13 is assembled, two side walls of the fixing groove structure 1435 in the height direction are respectively fixed in the limiting groove 125, so that even though low-cost power supply to the light bar 10 is achieved, the connection strength between the connector 13 and the limiting electrode mechanism 12 is improved.

It should be noted that, the light bar 10 provided in this embodiment further includes a circuit and a lamp bead assembly disposed on the PCB 11, but this part of the structure is the prior art, and is not described in detail in this application.

In a second embodiment of the present invention, a backlight module is provided, which includes the light bar 10 in the above embodiments of the present invention. It can be understood that, in the backlight module provided in the present invention, by using the light bar 10 provided in the above embodiment, the cost of the power supply structure of the backlight module can be effectively reduced, and the limit electrode mechanism 12 is disposed on the positive foil electrode 121 and the negative foil electrode 122 (metal foil, for example, copper foil) on the PCB 11, so as to replace the first connection seat 14 including the injection molding seat body welded on the PCB 11 of the light bar 10 in the prior art, and only the positive foil electrode 121 and the negative foil electrode 122 of the metal foil (copper foil) extend from the PCB 11, thereby omitting an injection molding housing, reducing the cost, omitting a welding process, and increasing the yield of the light bar 10; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism 12, so that power supply to the backlight module is realized.

In a third embodiment of the present invention, a display device is provided, which includes the light bar in the above embodiments of the present invention. It can be understood that, according to the display device provided in the present invention, by using the light bar provided in the above embodiment, the cost of the power supply structure of the display device can be effectively reduced, and the limit electrode mechanism 12 is disposed on the positive foil electrode 121 and the negative foil electrode 122 (metal foil, for example, copper foil) on the PCB 11, so as to replace the first connection seat 14 including the injection molding seat body welded on the PCB 11 of the light bar 10 in the prior art, and only the positive foil electrode 121 and the negative foil electrode 122 of the metal foil (copper foil) extend from the PCB 11, thereby omitting an injection molding housing, reducing the cost, also omitting a welding process, and increasing the yield of the light bar 10; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism 12, so that power supply to the display equipment is realized.

Compared with the prior art, the light bar, the backlight module and the display device provided by the invention have the advantages that the light bar comprises: a PCB board; the limiting electrode mechanism is arranged on the PCB and comprises a positive foil electrode and a negative foil electrode; and the connector is connected to the PCB, one end of the connector is used for externally connecting a power supply circuit, and the other end of the connector is electrically connected with the limiting electrode mechanism. It can be understood that the limiting electrode mechanism is arranged on the positive foil electrode and the negative foil electrode (metal foil, such as copper foil) on the PCB, so as to replace the positive foil electrode and the negative foil electrode (metal foil, such as copper foil) welded on the PCB of the light bar in the prior art, the first connecting seat comprising the injection molding seat body only extends out of the PCB and the positive foil electrode and the negative foil electrode of the metal foil (copper foil), so that an injection molding shell is omitted, the cost is reduced, the welding process is omitted, and the yield of the light bar is increased; one end of the limiting electrode mechanism is used for being externally connected with a power supply circuit, and the other end of the limiting electrode mechanism is electrically connected with the limiting electrode mechanism, so that power supply to the lamp strip is realized.

It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.

Claims (4)

1. A light bar, comprising:

a PCB board;

the limiting electrode mechanism is arranged on the PCB and comprises a positive foil electrode and a negative foil electrode;

the connector is connected to the PCB, one end of the connector is used for being externally connected with a power supply circuit, and the other end of the connector is electrically connected with the limiting electrode mechanism;

the positive foil electrode and the negative foil electrode are arranged as copper foils exposed outside the PCB;

the connector includes: a connecting seat; the power supply terminal is arranged on the connecting seat, one end of the power supply terminal is used for being externally connected with a power supply circuit, and the other end of the power supply terminal is used for being electrically connected with the limiting electrode mechanism; the connecting seat is used for detachably connecting the power terminal to the PCB;

the connecting seat includes: a connecting seat body; the terminal fixing groove is formed in the connecting seat body and used for accommodating and fixing the power supply terminal; the light bar connecting piece is arranged at one end, departing from the terminal fixing groove, of the connecting seat body and is used for connecting a PCB (printed circuit board) of the light bar;

the light bar connecting piece is arranged to be a clamping piece and comprises a first clamping plate and a second clamping plate which extend from the width direction of the connecting seat body, and the first clamping plate and the second clamping plate are arranged at intervals along the height direction of the connecting seat body; the first clamping plate and the second clamping plate are clamped and fixed on the PCB in a matching manner;

the power supply terminal is provided with a light bar wire with a metal electrode and comprises a power supply positive terminal and a power supply negative terminal, and the terminal fixing grooves comprise a first terminal fixing groove and a second terminal fixing groove which are arranged in an L shape; the positive terminal of the power supply is fixed in the first terminal fixing groove and corresponds to the position of the positive foil electrode, and the negative terminal of the power supply is fixed in the second terminal fixing groove and corresponds to the position of the negative foil electrode; the power supply positive terminal and the power supply negative terminal are both set to be L-shaped elastic electrodes, the power supply positive terminal is in interference fit with the positive foil electrode, and the power supply negative terminal is in interference fit with the negative foil electrode;

the end part of the first clamping plate, which is away from the connecting seat body, is provided with a first bending plate facing the second clamping plate; the limiting electrode mechanism is arranged at one end of the PCB in the width direction, and the first bending plate is buckled at the other end of the PCB in the width direction;

the end part of the first bending plate along the thickness direction of the PCB is provided with a chamfer or a fillet; the limiting electrode mechanism also comprises a limiting slotted hole which is arranged along the thickness direction of the PCB, and the limiting slotted hole is arranged in a straight line with the positive foil electrode and the negative foil electrode along the width direction of the PCB; when the power supply terminal is electrically connected with the positive foil electrode and the negative foil electrode, the first bending plate is clamped in the limiting slotted hole.

2. The light bar of claim 1,

the lamp strip connecting piece is arranged into a fixed groove structure, the limiting electrode mechanism further comprises a lug matched with the fixed groove structure, the lug extends and is formed from the end part of the PCB in the length direction, and the positive foil electrode and the negative foil electrode are arranged on the lug;

or the lamp strip connecting piece is arranged into a fixed groove structure, and the limiting electrode mechanism further comprises a convex block matched with the fixed groove structure; the lug is arranged on the PCB and is flush with the end face of the PCB in the width direction, the two sides of the lug in the length direction are concavely provided with limit grooves, and the positive foil electrode and the negative foil electrode are arranged on the lug.

3. A backlight module comprising the light bar of any one of claims 1-2.

4. A display device comprising the light bar of any one of claims 1-2.

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