Light source device

A light source device, comprising:

• (i) a blue light emitting element that emits blue light having an emission peak in a wavelength region of 440 nm to 460 nm;
• (ii) a first light-transmissive member that encapsulates the blue light emitting element and contains:
• (a) a green phosphor that absorbs part of the blue light emitted by the blue light emitting element and thereby emits green light having an emission peak in a wavelength region of 500 nm to 575 nm;
• and
• (b) a red phosphor that absorbs at least one of part of the blue light emitted by the blue light emitting element and part of the green light emitted by the green phosphor, and thereby emits red light having an emission peak in a wavelength region of 600 nm to 690 nm;
• and
• (iii) a second light-transmissive member that covers the first light-transmissive member and contains an absorbent containing neodymium fluoride that absorbs part of the green light and part of the red light.

A light source device, comprising:

• (i) a blue light emitting element that emits blue light having an emission peak in a wavelength region of 440 nm to 460 nm;
• (ii) a green phosphor that absorbs part of the blue light emitted by the blue light emitting element and thereby emits green light having an emission peak in a wavelength region of 500 nm to 575 nm;
• (iii) a red phosphor that absorbs at least one of part of the blue light emitted by the blue light emitting element and part of the green light emitted by the green phosphor, and thereby emits red light having an emission peak in a wavelength region of 600 nm to 690 nm;
• and
• (iv) a light diffusion plate containing an absorbent containing neodymium fluoride that absorbs part of the green light and part of the red light and having:
• (a) a first principal surface into which a mixture of the blue light, the green light, and the red light enters;
• and (b) a second principal surface from which the mixture of the blue light, the green light, and the red light emerges.

A light source device, comprising:

• (i) a blue light emitting element that emits blue light having an emission peak in a wavelength region of 440 nm to 460 nm;
• (ii) a green phosphor that absorbs part of the blue light emitted by the blue light emitting element and thereby emits green light having an emission peak in a wavelength region of 500 nm to 575 nm;
• (iii) a red phosphor that absorbs at least one of part of the blue light emitted by the blue light emitting element and part of the green light emitted by the green phosphor, and thereby emits red light having an emission peak in a wavelength region of 600 nm to 690 nm;
• and
• (iv) a light guide plate containing an absorbent containing neodymium fluoride that absorbs part of the green light and part of the red light and having:
• (a) a side surface into which a mixture of the blue light, the green light, and the red light enters;
• and (b) at least one principal surface from which the mixture of the blue light, the green light, and the red light emerges.