Aspects of the present disclosure relate to a lighting device that is configured to provide light with a high color rendering index (CRI) value and/or uniform planar illumination. The lighting device may include a circuit board, a light emitting diode (LED) mounted to the circuit board and configured to emit broad spectrum light having a first CRI value, a photo-luminescent material disposed above the LED mounted to the circuit board configured to increase the CRI of the broad spectrum light emitted by the LED from the first CRI value to a higher, second CRI value, and an elastomer encapsulating at least part of the circuit board. Additionally, the lighting device may include a lens disposed over the LED configured to increase the maximum emission angle of light from the LED and a diffuser disposed above the lens and configured to diffuse the broad spectrum light.

An illumination apparatus for a motor vehicle includes a light source for emitting light of a first mixed color, said light source containing one or more laser diodes for generating monochromatic light and a first conversion element for converting the monochromatic light into the light of the first mixed color. The illumination apparatus also includes a first optical device which images the light source as a real image in an intermediate image plane, and a second optical device which generates a predefined light distribution from the real image in the intermediate image plane. A second conversion element is provided at the site of the real image in the intermediate image plane in order to convert the light of the first mixed color into light of a second mixed color.

The invention provides an arrangement (1) comprising a device (1000), wherein the device (1000) comprises a luminescent material comprising element (100) and a light transmissive element (200), wherein: (a) the device (1000) has a first device axis (A1); (b) the luminescent material comprising element (100) comprises a luminescent material (110) configured to emit luminescent material light (111) upon irradiation with first light (11), wherein the luminescent material comprising element (100) has a first length (L1) and a characteristic first dimension (D1) perpendicular to the first length (L1), wherein D1/L1<1; wherein the luminescent material comprising element (100) is configured at a non-zero first distance (r1) from the first device axis (A1), and wherein the luminescent material comprising element (100) at least partly surrounds the first device axis (A1); (c) the light transmissive element (200) is transmissive for the first light (11), wherein the light transmissive element (200) comprises a element light entrance part (201 and an element light escape part (202), wherein the element light escape part (202) and the luminescent material (110) are radiationally coupled; wherein one or more of the following applies: (i) the first device axis (A1) intersects the light transmissive element (200), and (ii) the light transmissive element (200) at least partly surrounds the first device axis (A1); and (d) the luminescent material comprising element (100) is in thermal contact with one or more of (a) the light transmissive element (200) and (b) an optional thermally conductive element (300).

The invention provides an arrangement (1) comprising a device (1000), wherein the device (1000) comprises a luminescent material comprising element (100) and a light transmissive element (200), wherein: (a) the device (1000) has a first device axis (A1); (b) the luminescent material comprising element (100) comprises a luminescent material (110) configured to emit luminescent material light (111) upon irradiation with first light (11), wherein the luminescent material comprising element (100) has a first length (L1) and a characteristic first dimension (D1) perpendicular to the first length (L1), wherein D1/L1<1; wherein the luminescent material comprising element (100) is configured at a non-zero first distance (r1) from the first device axis (A1), and wherein the luminescent material comprising element (100) at least partly surrounds the first device axis (A1); (c) the light transmissive element (200) is transmissive for the first light (11), wherein the light transmissive element (200) comprises a element light entrance part (201 and an element light escape part (202), wherein the element light escape part (202) and the luminescent material (110) are radiationally coupled; wherein one or more of the following applies: (i) the first device axis (A1) intersects the light transmissive element (200), and (ii) the light transmissive element (200) at least partly surrounds the first device axis (A1); and (d) the luminescent material comprising element (100) is in thermal contact with one or more of (a) the light transmissive element (200) and (b) an optional thermally conductive element (300).

Included are: a laser light source which emits a plurality of laser beams; an aspherical lens which the plurality of laser beams emitted from the laser light source enters and which converts the plurality of laser beams into convergent beams; and a phosphor which is irradiated with the convergent beams from the aspherical lens as excitation beams to generate fluorescence, wherein the plurality of laser beams have different spread angles in a horizontal direction and a vertical direction and enter the aspherical lens while arranged in a direction in which the spread angle is smaller, from among the horizontal direction and the vertical direction, and the aspherical lens has a function of equalizing a light intensity in a direction in which the spread angle is larger, from among the horizontal direction and the vertical direction.

A method of manufacturing a light-emitting device includes: providing a light source having a first substrate and a light-emitting element coupled to the first substrate, and a second substrate defining one or more recesses or one or more through-holes; and positioning the second substrate above the first substrate, and adjusting a position of the second substrate such that the one or more recesses or the one or more through-holes define at least a part of one or more positioning holes respectively positioned at predetermined distances from a light-emitting part of the light source in a top plan view.

A method of manufacturing a light-emitting device includes: providing a light source having a first substrate and a light-emitting element coupled to the first substrate, and a second substrate defining one or more recesses or one or more through-holes; and positioning the second substrate above the first substrate, and adjusting a position of the second substrate such that the one or more recesses or the one or more through-holes define at least a part of one or more positioning holes respectively positioned at predetermined distances from a light-emitting part of the light source in a top plan view.

A light source device of the present disclosure includes a sapphire plate having a first surface and a second surface facing each other, a wavelength conversion material located opposite the first surface of the sapphire plate, and a first excitation light source emitting a first excitation light having directivity to the wavelength conversion material through the second surface, in which an angle between the first surface and the second surface, and a c-axis of sapphire is greater than 80°, and an angle between the c-axis and an optical axis of the first excitation light is 20° or more. A lighting device of the present disclosure includes the light source device and a light guide member.

A light source apparatus includes light sources emitting first and second polarized light, an optical element transmitting one of the polarized light and reflecting the other, a polarization rotator generating polarization rotated light from the first polarized light, a wavelength convertor converting the second polarized light into wavelength converted light, and a controller. The optical element generates emitted light by combining the wavelength converted light and polarization rotated light. The controller acquires respective deterioration amounts of the light sources, and controls, based on respective changes in light emission amounts from the light sources acquired from the deterioration amounts, the light emission amount from at least one of the light sources for making different respective change amounts of the light emission amounts from the light sources, or changing a ratio between respective light emission amounts from the light sources.

A laser light assembly includes a substrate, a reflective phosphor plate, a plurality of laser diodes, a light shield, at least one mirror, a plurality of beam-shaping lenses, and a first lens. The reflective phosphor plate is coupled to the substrate and converts incident blue laser light into white light. The laser diodes emit the blue laser light. The light shield prevents the blue laser light emitted by the laser diodes from escaping the assembly. The mirror reflects the blue laser light emitted from each laser diode toward a predetermined position on the reflective phosphor plate, whereby the reflective phosphor plate emits white light. The beam-shaping lenses are disposed between a different one of the laser diodes and the mirror. The first lens receives the white emitted from the reflective phosphor plate.