Light source lighting circuit and turn signal lamp
First Claim
1. A light source lighting circuit comprising:
- a first lighting circuit having a first light emission driving circuit configured to receive current from an electric power supply line and to supply drive current to a first light source, anda second lighting circuit having a second light emission driving circuit configured to receive current from the electric power supply line and to supply drive current to a second light source,wherein the first lighting circuit is configured to generate a first state signal corresponding to a state of the drive current flowing to the first light source and to output a second notification signal corresponding to the first state signal to the second lighting circuit,wherein the second lighting circuit is configured to generate a second state signal corresponding to a state of the drive current flowing to the second light source and to output a first notification signal corresponding to the second state signal to the first lighting circuit,wherein when the first state signal indicates an abnormality or when the first notification signal indicates an abnormality, the first lighting circuit stops operation thereof, andwherein when the second state signal indicates an abnormality or when the second notification signal indicates an abnormality, the second lighting circuit stops operation thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
A light source lighting circuit comprises a first lighting circuit for receiving current from the electric power supply line and supplying drive current to a first light source and a second lighting circuit for receiving the current from the electric power supply line and supplying drive current to a second light source. When a state of the drive current flowing to the first light source shows an abnormality, or when state of the drive current flowing to the second light source shows an abnormality, the first lighting circuit stops operation. When a state of the drive current flowing to the second light source shows an abnormality, or when a state of the drive current flowing to the first light source shows an abnormality, the second lighting circuit stops operation.
9 Citations
16 Claims
-
1. A light source lighting circuit comprising:
-
a first lighting circuit having a first light emission driving circuit configured to receive current from an electric power supply line and to supply drive current to a first light source, and a second lighting circuit having a second light emission driving circuit configured to receive current from the electric power supply line and to supply drive current to a second light source, wherein the first lighting circuit is configured to generate a first state signal corresponding to a state of the drive current flowing to the first light source and to output a second notification signal corresponding to the first state signal to the second lighting circuit, wherein the second lighting circuit is configured to generate a second state signal corresponding to a state of the drive current flowing to the second light source and to output a first notification signal corresponding to the second state signal to the first lighting circuit, wherein when the first state signal indicates an abnormality or when the first notification signal indicates an abnormality, the first lighting circuit stops operation thereof, and wherein when the second state signal indicates an abnormality or when the second notification signal indicates an abnormality, the second lighting circuit stops operation thereof. - View Dependent Claims (2, 3, 12)
-
-
4. A light source lighting circuit comprising:
-
a first lighting circuit having a first light emission driving circuit configured to turn on a plurality of light sources of a first light emitting unit on the basis of an input voltage, and a second lighting circuit having a second light emission driving circuit configured to turn on a light source of a second light emitting unit on the basis of an input voltage, wherein the first lighting circuit having a sequential circuit configured; to sequentially turn on the light sources of the first light emitting unit in accordance with a timing signal, and to output the timing signal to the second lighting circuit, and wherein the second lighting circuit is configured to start lighting of the light source of the second light emitting unit in accordance with the timing signal. - View Dependent Claims (5, 6, 7)
-
-
8. A light source lighting circuit comprising:
-
a first lighting circuit having a first light emission driving circuit configured to receive current from an electric power supply line and to supply drive current to a first light source; a second lighting circuit having a first light emission driving circuit configured to receive current from the electric power supply line and to supply drive current to a second light source, and a first current consuming unit provided for the first lighting circuit and configured to consume a part of the electric power to be supplied from the electric power supply line and to enable first regulating current to flow, wherein the first lighting circuit is configured to generate a first state signal corresponding to a state of the drive current flowing to the first light source, wherein the second lighting circuit is configured to generate a second state signal corresponding to a state of the drive current flowing to the second light source and to output a first notification signal corresponding to the second state signal to the first lighting circuit, and wherein when the first state signal indicates an abnormality or when the first notification signal indicates an abnormality, the first lighting circuit lowers a current value of the first regulating current. - View Dependent Claims (9, 10, 11, 13)
-
-
14. A light source lighting circuit provided for a pair of lamps of which electric power supply from a vehicle-side is individually controlled, the light source lighting circuit comprising:
-
a lighting circuit having a light emission driving circuit configured to enable drive current to flow to a light source on the basis of the electric power to be supplied from the vehicle-side; a current consuming unit configured to consume a part of the electric power to be supplied from the vehicle-side and to enable regulating current to flow, and a current regulation circuit configured to receive a drive state signal corresponding to a state of the drive current and a mode signal indicative of a lighting/lights-out state of the other lamp from the other lamp and to lower a current value of the regulating current in each of a case where the drive state signal indicates an abnormality and a case where the mode signal indicates a lighting state. - View Dependent Claims (15, 16)
-
Specification