LIGHT-EMITTING DEVICE, ILLUMINATION DEVICE, IMAGE DISPLAY DEVICE, AND INDICATOR LAMP FOR VEHICLE
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Mar 27, 2025
app pub date -
Dec 6, 2024
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Dec 6, 2024
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Abstract
The present invention relates to a light-emitting device including a first luminescent material and a second luminescent material which emits visible light by irradiation with light from the first luminescent material, in which the second luminescent material contains at least a red phosphor which satisfies the following (A) and (B): (A) An emission spectrum has at least one emission peak having a full width at half maximum (FWHM) of 20 nm or more and 65 nm or less, and (B) Chromaticity coordinates of a light emission color are present between two straight lines represented by the following equation (a) and equation (b) based on coordinates represented by (x, y) in a CIE 1931 chromaticity coordinate system: (a) y=0.992−x, (b) y=1.000−x, and 0.290≤y≤0.350, an illumination device, an image display device, and an indicator lamp for a vehicle.
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