Light source driving device, light emitting device, and distance measuring device

A light emitting device comprising:

• a light source;
• an emission unit that collects and emits light from the light source;
• a light receiving unit that receives light from the light source via the emission unit;
• an abnormality detection unit that detects an abnormality of light emitted from the emission unit based on the light that has been received;
• a light source control unit that controls light emission of the light source and stops the light emission of the light source when the abnormality of light is detected;
• and
• an emission control unit that controls light collection of the emission unit and stops the light collection of the emission unit when the abnormality of light is detected.

A distance measuring device comprising:

• a light emitting device including:
• a light source;
• an emission unit that collects and emits light from the light source;
• a light receiving unit that receives light from the light source via the emission unit;
• an abnormality detection unit that detects an abnormality of light emitted from the emission unit based on the light that has been received;
• a light source control unit that controls light emission of the light source and stops the light emission of the light source when the abnormality of light is detected;
• and
• an emission control unit that controls light collection of the emission unit and stops the light collection of the emission unit when the abnormality of light is detected;
• a sensor that detects reflected light obtained by light emitted from the light source being reflected by an object;
• and
• a processing circuit that performs processing of measuring a distance to the object based on a time from emission of light from the light source to detection of the reflected light.