To provide a vehicular imaging apparatus which can quickly increase the temperature of a heater.SOLUTION: In a vehicular imaging apparatus 10, an electric circuit including a heater 26 is serially connected to a resistance member 32. The resistance member 32 is heated with the electric conduction, and an electric resistance value is increased with the temperature rise due to the heat generation. Therefore, when the resistance member 32 is heated and the temperature is sufficiently increased, a current value of a current flowing in the heater 26 can be reduced and the heat generation of the heater 26 can be suppressed. Also, since the electric resistance value is increased due to the temperature rise in the resistance member 32, the current having the large current value can be made to flow in the heater 26 at the start of application of voltage to the electric circuit including the heater 26 and the resistance member 32, and the temperature of the heater 26 can be quickly increased.SELECTED DRAWING: Figure 1
【課題】ヒータの温度上昇を早くできる車両用撮像装置を得る。【解決手段】本車両用撮像装置10では、ヒータ26を含んだ電気回路に抵抗部材32に対して直列に接続されている。抵抗部材32は、通電されることで発熱されると共に、発熱による温度上昇に伴い電気抵抗値が増加される。このため、抵抗部材32が発熱されて十分に温度が上昇されると、ヒータ26に流れる電流の電流値を小さくでき、ヒータ26の発熱を抑制できる。また、抵抗部材32は、温度上昇によって電気抵抗値が増加されるため、ヒータ26及び抵抗部材32を含んだ電気回路への電圧の印加開始時にヒータ26に大きな電流値の電流を流すことができ、ヒータ26の温度上昇を早くできる。【選択図】図1
VEHICULAR IMAGING APPARATUS
車両用撮像装置
2021-08-30
Patent
Electronic Resource
Japanese
IPC: | B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen |