{
  "$type": "site.standard.document",
  "description": "A light-emitting diode (LED) luminaire comprising a normally operated portion and an emergency operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally operated portion comprises LED arrays and a power supply whereas the…",
  "path": "/patents/1255391",
  "publishedAt": "2020-02-20T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H05B37/0281",
    "Aleddra Inc."
  ],
  "textContent": "A light-emitting diode (LED) luminaire comprising a normally operated portion and an emergency operated portion is used to replace a luminaire operated only in a normal mode with alternate-current (AC) mains. The normally operated portion comprises LED arrays and a power supply whereas the emergency operated portion comprises a rechargeable battery, a charging circuit, an LED driving circuit, a self-diagnostic circuit, and a charging detection and control circuit. According to availability of the AC mains, the LED luminaire can auto-select to work in an emergency mode when a line voltage from the AC mains is unavailable. The self-diagnostic circuit comprises multiple timers and is configured to provide multiple sequences and to auto-test battery discharging current according to the multiple sequences. During an auto-test period, a terminal voltage on the rechargeable battery and an LED forward voltage across the LED arrays are examined with test results displayed in a status indicator.",
  "title": "Solid-State Lighting With Multiple Time Delays"
}