WHITE LIGHT-EMITTING SEMICONDUCTOR DEVICES
First Claim
1. A white light-emitting semiconductor device which outputs light comprising a blue light component, a green light component, and a red light component, whereinthe blue light component includes light having any wavelength in the range of 440-480 nm,the green light component includes light having any wavelength in the range of 515-560 nm, andthe red light component includes light having any wavelength in the range of 615-645 nm,a source of the blue light component comprises a light-emitting semiconductor element and/or a first phosphor that absorbs the light emitted by a light-emitting semiconductor element and emits, through wavelength conversion, light including the blue light component,a source of the green light component comprises a second phosphor that absorbs the light emitted by a light-emitting semiconductor element and emits, through wavelength conversion, light including the green light component, anda source of the red light component comprises a third phosphor that absorbs the light emitted by a light-emitting semiconductor element and emits, through wavelength conversion, light including the red light component,the outputted light has a spectrum which has a maximum wavelength in the range of 615-645 nm, andan intensity at a wavelength of 580 nm of the spectrum of the outputted light which has been normalized with respect to luminous flux, is 80-100% of an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux.
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Accused Products
Abstract
A white light-emitting semiconductor device having improved reproducibility of bright red. The device outputs light having a blue component, a green component, and a red component. Each of the light components (blue, green, and red) consists of a light-emitting semiconductor element and/or a phosphor that absorbs light emitted by a light-emitting semiconductor element and emits light through wavelength conversion. The outputted light has a spectrum which has a maximum wavelength in the range of 615-645 nm, and the intensity at a wavelength of 580 nm of the outputted light, which has been normalized with respect to luminous flux, is 80-100% of the intensity at a wavelength of 580 nm of standard light for color rendering evaluation, which has been normalized with respect to luminous flux.
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Citations
23 Claims
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1. A white light-emitting semiconductor device which outputs light comprising a blue light component, a green light component, and a red light component, wherein
the blue light component includes light having any wavelength in the range of 440-480 nm, the green light component includes light having any wavelength in the range of 515-560 nm, and the red light component includes light having any wavelength in the range of 615-645 nm, a source of the blue light component comprises a light-emitting semiconductor element and/or a first phosphor that absorbs the light emitted by a light-emitting semiconductor element and emits, through wavelength conversion, light including the blue light component, a source of the green light component comprises a second phosphor that absorbs the light emitted by a light-emitting semiconductor element and emits, through wavelength conversion, light including the green light component, and a source of the red light component comprises a third phosphor that absorbs the light emitted by a light-emitting semiconductor element and emits, through wavelength conversion, light including the red light component, the outputted light has a spectrum which has a maximum wavelength in the range of 615-645 nm, and an intensity at a wavelength of 580 nm of the spectrum of the outputted light which has been normalized with respect to luminous flux, is 80-100% of an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux.
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10. A white light-emitting unit which emits white light containing a blue light component, a green light component, and a red light component, wherein
the blue light component includes light having any wavelength in the range of 440-480 nm, the green light component includes light having any wavelength in the range of 515-560 nm, and the red light component includes light having any wavelength in the range of 615-645 nm, the white light-emitting unit comprises: -
a light-emitting semiconductor element, a first phosphor that absorbs the light emitted by the light-emitting semiconductor element and emits, through wavelength conversion, light including the blue light component, a second phosphor that absorbs the light emitted by the light-emitting semiconductor element and emits, through wavelength conversion, light including the green light component, and a third phosphor that absorbs the light emitted by the light-emitting semiconductor element and emits, through wavelength conversion, light including the red light component, the white light has a spectrum which has a maximum wavelength in the range of 615-645 nm, and an intensity at a wavelength of 580 nm of the spectrum of the white light which has been normalized with respect to luminous flux is 80-100% of an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux. - View Dependent Claims (11, 12, 15, 16, 17, 18, 19)
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13. A white light-emitting unit which emits white light containing a blue light component, a green light component, and a red light component, wherein
the blue light component includes light having any wavelength in the range of 440-480 nm, the green light component includes light having any wavelength in the range of 515-560 nm, and the red light component includes light having any wavelength in the range of 615-645 nm, the white light-emitting unit comprises: -
a light-emitting semiconductor element that emits light including the blue light component, a second phosphor that absorbs the light emitted by the light-emitting semiconductor element and emits, through wavelength conversion, light including the green light component, and a third phosphor that absorbs the light emitted by the light-emitting semiconductor element and emits, through wavelength conversion, light including the red light component, the white light has a spectrum which has a maximum wavelength in the range of 615-645 nm, and an intensity at a wavelength of 580 nm of the spectrum of the white light which has been normalized with respect to luminous flux is 80-100% of an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux. - View Dependent Claims (14)
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20. A white light-emitting semiconductor device comprising first to Nth (wherein N is an integer of 2 or larger) white light-emitting units each equipped with a light-emitting semiconductor element and a wavelength conversion part, in which the first to Nth white light-emitting units each emit primary white light and the primary white light emitted by the units is mixed together, to form combined light as outputted light, wherein
the first to Nth white light-emitting units comprise a white light-emitting unit which emits first primary white light and a white light-emitting unit which emits second primary white light, an intensity at a wavelength of 580 nm of the spectrum of the first primary white light which has been normalized with respect to luminous flux is higher than an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux, an intensity at a wavelength of 580 nm of the spectrum of the second primary white light which has been normalized with respect to luminous flux is lower than an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux, and the outputted light has a spectrum which has a maximum wavelength in the range of 615-645 nm, and an intensity at a wavelength of 580 nm of the spectrum of the outputted light which has been normalized with respect to luminous flux is 80-100% of an intensity at a wavelength of 580 nm of the spectrum of standard light for color rendering evaluation which has been normalized with respect to luminous flux.
Specification