{
  "$type": "site.standard.document",
  "description": "A lighting circuit turns on a plurality of semiconductor light sources. Multiple current sources are each coupled to a corresponding semiconductor light source. A switching converter supplies a driving voltage Vacross each of multiple series connection circuits each formed of the semiconductor…",
  "path": "/patents/1309207",
  "publishedAt": "2022-01-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H05B47/10",
    "KOITO MANUFACTURING CO., LTD."
  ],
  "textContent": "A lighting circuit turns on a plurality of semiconductor light sources. Multiple current sources are each coupled to a corresponding semiconductor light source. A switching converter supplies a driving voltage Vacross each of multiple series connection circuits each formed of the semiconductor light source and the current source. A converter controller employing a ripple control method turns on a switching transistor of the switching converter in response to a voltage across any one of the multiple current sources decreasing to a bottom limit voltage.",
  "title": "LIGHTING CIRCUIT OF AUTOMOTIVE LAMP"
}