{
  "$type": "site.standard.document",
  "description": "An LED light emitting device is provided, whereby it is possible to realize a distinct change in emission color over the entire region within a changeable range of emission color and at the same time to obtain a highly distinguishable emission color also in an intermediate region within the…",
  "path": "/patents/989462",
  "publishedAt": "2013-06-26T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60Q3/85",
    "MITSUBISHI CHEM CORP [JP]"
  ],
  "textContent": "An LED light emitting device is provided, whereby it is possible to realize a distinct change in emission color over the entire region within a changeable range of emission color and at the same time to obtain a highly distinguishable emission color also in an intermediate region within the changeable range of emission color. An LED light emitting device which radiates a combined light of visible light emitted from first and second LEDs and which comprises a drive controller unit that respectively controls drive currents for the first and second LEDs, wherein the first LED emits visible light of an emission color such that with respect to a CIE (1976) L*u*v* color space chromaticity diagram, the chromaticity is exterior to a prescribed white light region wherein the absolute value of a deviation duv from the blackbody radiation locus is at most 0.02 and the color temperature is within a range of from 2,500 K to 10,000 K, and the deviation duv from the blackbody radiation locus is larger than 0.02, and the second LED emits visible light of an emission color such that with respect to the above chromaticity diagram, the chromaticity is exterior to the prescribed white light region, and the deviation duv from the blackbody radiation locus is smaller than -0.02.",
  "title": "LED LIGHT EMITTING DEVICE AND INDICATOR COMPRISING LED LIGHT EMITTING DEVICE"
}