CN210202146U

CN210202146U - Lamp circuit

Info

Publication number: CN210202146U
Application number: CN201920500418.7U
Authority: CN
Inventors: Baizun Wu; 吴柏尊; Guangrong Xu; 徐光荣; Xiangjun Yu; 俞相军; Huadong Wang; 王华栋
Original assignee: Prosperous (ningbo) Lighting Electrical Appliance Co Ltd
Current assignee: Prosperous (ningbo) Lighting Electrical Appliance Co Ltd
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-03-27
Anticipated expiration: 2029-04-12

Abstract

The utility model discloses a lamp circuit, it includes a lamp area circuit, lamp area circuit include a first luminous module, a second luminous module and two first wiring ends, first luminous module and second luminous module parallel connection are between two first wiring ends, first luminous module includes a plurality of forward series connection's first emitting diode, the second luminous module includes a plurality of backward series connection's second emitting diode, lamp circuit still includes a current commutation circuit, current commutation circuit includes a H bridge circuit and a controller, H bridge circuit includes two second wiring ends that are used for current input or output, two second wiring ends of H bridge circuit are connected with two first wiring ends electricity in lamp area circuit respectively, four outputs of controller are connected with four control end electricity of H bridge circuit respectively. The utility model discloses make lamp area circuit only need two wirings.

Description

Lamp circuit

Technical Field

The utility model relates to a lamp circuit.

Background

In the prior lamp, the lamp strip circuit generally comprises two light-emitting modules, a current reversing module and two wiring terminals, the color temperatures of light sources on the two light-emitting modules are different, the two wiring terminals are used for being connected with a power supply circuit, the current reversing module is connected with a controller, and the controller is used for controlling the current reversing module to work so that the current direction flowing through the two light-emitting modules can be forward or reverse.

Like this, above-mentioned lamp area circuit need be connected two wiring ends with the power, be connected current switching-over module and controller for above-mentioned lamp area circuit needs three wiring, and the wiring quantity is more, and is comparatively troublesome when making lamp area circuit installation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a lamp circuit is provided, it makes lamp area circuit only need two wirings.

In order to solve the technical problem, the lamp circuit provided by the utility model comprises a lamp belt circuit, the lamp strip circuit comprises a first light-emitting module, a second light-emitting module and two first wiring ends, the first light-emitting module and the second light-emitting module are connected between the two first wiring ends in parallel, the first light-emitting module comprises a plurality of first light-emitting diodes connected in forward series, the second light-emitting module comprises a plurality of second light-emitting diodes connected in reverse series, the lamp circuit further comprises a current reversing circuit, the current reversing circuit comprises an H-bridge circuit and a controller, the H-bridge circuit comprises two second wiring ends used for current input or output, the two second wiring ends of the H-bridge circuit are respectively and electrically connected with the two first wiring ends of the lamp strip circuit, and four output ends of the controller are respectively and electrically connected with four control ends of the H-bridge circuit.

Preferably, the first light emitting diodes and the second light emitting diodes are arranged in a one-to-one correspondence manner, and each first light emitting diode is connected with the corresponding second light emitting diode end to end.

After the structure more than adopting, compared with the prior art, the utility model, have following advantage:

the utility model discloses a lamp circuit, owing to be provided with H bridge circuit, can control the current direction that flows in lamp area circuit through H bridge circuit to only one can switch on simultaneously and shine to the first luminous module of control and the luminous module of second, like this, to lamp area circuit, only need be connected two first wiring ends with the power, just also make lamp area circuit only need two wiring, compare lamp area circuit needs three wirings in prior art, the utility model discloses make lamp area circuit's wiring quantity reduce.

Drawings

Fig. 1 is a circuit block diagram of the present invention;

FIG. 2 is a schematic diagram of the structure of an H-bridge circuit;

fig. 3 is a schematic structural diagram of the lamp strip circuit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, 2, and 3, the lamp circuit of this embodiment includes a lamp strip circuit 100, where the lamp strip circuit 100 includes a first light emitting module 110, a second light emitting module 120, and two first terminals 130, the first light emitting module 110 and the second light emitting module 120 are connected in parallel between the two first terminals 130, the first light emitting module 110 includes a plurality of first light emitting diodes 111 connected in series in a forward direction, the second light emitting module 120 includes a plurality of second light emitting diodes 121 connected in series in a reverse direction, the first light emitting diodes 111 in the first light emitting module 110 all emit yellow light, and the first light emitting diodes 121 in the second light emitting module 120 all emit white light.

The lamp circuit further comprises a current commutation circuit 200, the current commutation circuit 200 comprises an H-bridge circuit 210 and a controller 220, the H-bridge circuit 210 comprises a MOS transistor Q1, a MOS transistor Q2, a MOS transistor Q3, a MOS transistor Q4 and two second terminals 211 for current input or output, one terminals of the MOS transistor Q1 and the MOS transistor Q3 are both electrically connected with the positive electrode of the power supply, the other terminal of the MOS transistor Q1 is electrically connected with one terminal of the MOS transistor Q2, the other terminal of the MOS transistor Q3 is electrically connected with one terminal of the MOS transistor Q4, the other terminal of the MOS transistor Q2 and the other terminal of the MOS transistor Q4 are both grounded, one second terminal 211 is connected between the MOS transistor Q1 and the MOS transistor Q2, and the other second terminal 211 is connected between the MOS transistor Q3 and the MOS transistor Q4.

Four output terminals of the controller 220 are electrically connected to four control terminals 212 of the H-bridge circuit 210, that is, four output terminals of the controller 220 are electrically connected to control terminals of the MOS transistor Q1, the MOS transistor Q2, the MOS transistor Q3, and the MOS transistor Q4, respectively.

The two second terminals 211 of the H-bridge circuit 210 are electrically connected to the two first terminals 130 of the light strip circuit 100, respectively, so that when the MOS transistor Q1 and the MOS transistor Q4 are turned on and the MOS transistor Q2 and the MOS transistor Q3 are turned off, the first light emitting diode 111 in the first light emitting module 110 is powered on and lit, and the second light emitting diode 121 in the second light emitting module 120 is not lit; when the MOS transistor Q1 and the MOS transistor Q4 are turned off and the MOS transistor Q2 and the MOS transistor Q3 are turned on, the first light emitting diode 111 in the second light emitting module 110 is energized to light, and the first light emitting diode 111 in the first light emitting module 110 is not lit.

The first light emitting diodes 111 and the second light emitting diodes 121 are arranged in a one-to-one correspondence, each first light emitting diode 111 is connected with the corresponding second light emitting diode 121 end to end through the line 140, because when the first light emitting module 110 is conducted, the second light emitting module 120 is subjected to a reverse voltage, because the number of the second light emitting diodes 121 in the second light emitting module 120 is large, the actual reverse voltage may be several times higher than the reverse voltage allowed by the second light emitting diodes, thereby causing damage to the second light emitting diodes, in this embodiment, each first light emitting diode 111 is connected with the corresponding second light emitting diode 121 end to end through the line 140, so that when the first light emitting diodes 111 are conducted in the forward direction, the voltage at two ends of the second light emitting diode 121 corresponding to each first light emitting diode 111 can be clamped within the forward voltage of the first light emitting diode 111, to prevent the second light emitting diode 121 from being damaged by an ultra-high reverse voltage; when the second light emitting module 120 is turned on, the first light emitting diode 111 can be prevented from being damaged by the ultra-high reverse voltage.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention, but should not be construed as limiting the claims, and the present invention is not limited to the above-described embodiments, but may be modified in various ways. In summary, all changes that can be made within the scope of the independent claims of the present invention are within the scope of the present invention.

Claims

1. A lamp circuit, it includes a lamp strip circuit (100), lamp strip circuit (100) include a first light emitting module (110), a second light emitting module (120) and two first terminals (130), first light emitting module (110) and second light emitting module (120) parallel connection are between two first terminals (130), first light emitting module (110) includes a plurality of forward series connection's first emitting diode (111), second light emitting module (120) includes a plurality of backward series connection's second emitting diode (121), its characterized in that: the lamp circuit further comprises a current commutation circuit (200), the current commutation circuit (200) comprises an H-bridge circuit (210) and a controller (220), the H-bridge circuit (210) comprises two second terminals (211) used for current input or output, the two second terminals (211) of the H-bridge circuit (210) are respectively and electrically connected with the two first terminals (130) of the light strip circuit (100), and four output ends of the controller (220) are respectively and electrically connected with four control ends (212) of the H-bridge circuit (210).

2. The lamp circuit of claim 1, wherein: the first light-emitting diodes (111) and the second light-emitting diodes (121) are arranged in a one-to-one correspondence mode, and each first light-emitting diode (111) is connected with the corresponding second light-emitting diode (121) in an end-to-end mode.