Vehicle led lamp lighting circuit, vehicle led lamp lighting device, and method for controlling vehicle led lamp lighting circuit
A technology of LED lamps and lighting circuits, which is applied in the direction of electric lamp circuit layout, signal devices, lighting devices, etc., can solve the problems of high price of switching devices, increase the manufacturing cost of LED lamp lighting circuits for vehicles, etc., and achieve the purpose of suppressing wrong lighting and reducing manufacturing costs. cost effect
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no. 1 approach
[0080] The automotive LED lamp lighting circuit 100 according to the first embodiment controls the lighting of LED lamps mounted on vehicles (not shown) such as two-wheeled vehicles ( figure 1 ). also, figure 1 The example shown is a state where the reference node TB is not connected to the first and second nodes T1 and T2 in the switching device SW.
[0081] The vehicle LED lamp lighting circuit 100 includes ( figure 1 ): The first resistor R1, one end of which is connected to the power line VCC, and the other end to the first contact point T1; the first LED lamp L1, one end of which is connected to the reference node TB, and the other end to the second contact point T2 And the ground line GND is connected; and the switch device SW controls the current flowing through the first LED lamp L1.
[0082] This vehicle LED lamp lighting circuit 100 is mounted on a vehicle such as the aforementioned two-wheeled vehicle, for example.
[0083] The power supply line VCC is supplied with a ...
no. 2 approach
[0112] In the second embodiment of the present invention, another configuration example of an LED lamp lighting circuit for a vehicle will be described.
[0113] The vehicle LED lamp lighting circuit 200 according to the second embodiment, like the first embodiment, controls the lighting of the LED lamp mounted on a vehicle (not shown) such as a two-wheeled vehicle ( Figure 5 ). also, Figure 5 The example shown is a state where the reference node TB is not connected to the first and second nodes T1 and T2 in the switching device SW. In addition, Figure 5 Middle and figure 1 The same symbols indicate the same configuration as in the first embodiment.
[0114] The car LED lamp lighting circuit 200 includes ( Figure 5 ): The first resistor R1, one end of which is connected to the power line VCC, and the other end to the first contact point T1; the first LED lamp L1, one end of which is connected to the reference node TB, and the other end to the second contact point T2 And the g...
no. 3 approach
[0145] In the first embodiment described above, even if the switching device SW is in the first state of conduction between the reference node TB and the first contact T1, and between the second state of conduction between the reference node TB and the second contact T2 When switching, as long as the leakage current does not flow, no current flows at the second contact T2. In this case, when the metal on the surface of the second contact T2 is oxidized or is adhered to insulators, the second contact T2 may have poor insulation.
[0146] Here, in the third embodiment, the second contact of the switchgear is allowed to flow current to suppress the oxidation of the second contact and the adhesion of the insulator, thereby suppressing the insulation failure of the second contact. The structure of the LED lamp lighting circuit will be explained.
[0147] The vehicle LED lamp lighting circuit 300 according to the third embodiment, like the first embodiment, controls the lighting of LED ...
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