Panasonic Intellectual Property Management Co., Ltd.

Yusaku Nishikawa

Shigekazu Yamagishi

Takashi Ikeda

Makoto Maeda

Yoshiki Tanaka

Taiki Bessho

Yasuto Shiroi

A phosphor wheel according to the present disclosure includes: a first substrate having a first main surface and a second main surface opposite to the first main surface, the first substrate including a metal material; a phosphor ring provided on the first main surface of the first substrate; a second substrate having a third main surface and a fourth main surface being opposite to the third main surface, the second substrate including a metal material; a plurality of heat dissipation fins disposed on the fourth main surface of the second substrate; and a motor mounted on the first substrate. The second main surface of the first substrate and the third main surface of the second substrate are joined by brazing. The motor is mounted on the first substrate with a gap interposed between the motor and the second substrate.

Phosphor wheel, light source device, and projection image display device

A phosphor wheel device includes a motor having a rotation shaft, a phosphor wheel substrate attached to one end side of the rotation shaft, and a balancer fixed to the phosphor wheel substrate. The balancer has at least one opening that is open to an outside of the phosphor wheel device.

Phosphor wheel device, light source device, and projection image display device

A wavelength conversion element includes a first phosphor region and a second phosphor region. The second phosphor region is disposed in a thickness direction of the first phosphor region and has a phosphor particle with a particle size different from a particle size of a phosphor particle positioned in the first phosphor region.

Wavelength conversion element, phosphor wheel, light source device, and projection display apparatus

The first dichroic filter is in a region including a circumference having a first radius, transmits source light and reflects fluorescence. The phosphor is in a region having a predetermined angular width of a region including a circumference having the first radius, and excited by source light to generate fluorescence. The first transmission window is in a region different from the region of the phosphor and transmits incident light. The second dichroic filter is in a region having a predetermined angular width of a region including a circumference having a second radius, and transmits source light and reflects incident light. The second transmission window is in a region different from the second dichroic filter and transmits source light. The diffusion film is on one of the first and second transmission windows, and diffuses incident light.

Phosphor wheel device

A phosphor wheel apparatus includes: a substrate made of a heat conductive material having a first light reflectance, the substrate having first and second surfaces facing each other; a phosphor layer disposed on the first surface of the substrate; an adhesive layer bonding the substrate and the phosphor layer to each other; and a plurality of fins disposed on the second surface of the substrate, wherein the adhesive layer includes an adhesive having first thermal conductivity and filler particles, and the filler particles have second thermal conductivity higher than the first thermal conductivity, and have a second light reflectance higher than the first light reflectance.

Phosphor wheel apparatus, lighting apparatus, and projection type image display apparatus

A wheel apparatus includes a substrate rotatable around a rotation axis, and a plurality of optical elements respectively formed in a plurality of regions different from each other around the rotation axis on the substrate and having wavelength characteristics different from each other. The regions of the plurality of optical elements are adjacent to each other via boundary lines including linear sections. The linear sections of the boundary lines intersect with respective straight lines along the radius of the substrate at the same intersection angle greater than 0 degrees and less than 90 degrees.

Wheel apparatus, light source apparatus, and projection-type image display apparatus

A lighting device of the present disclosure includes an excitation light source, a phosphor, a spreader, a reflective layer, and a reflective region. The excitation light source emits a polarized light. The phosphor receives the light as an excitation light from the excitation light source, and emits a fluorescent light, the phosphor including a plurality of phosphor pieces adjacently disposed on the reflective layer, the plurality of phosphor pieces having a same characteristic. The spreader supports the phosphor. The reflective layer is disposed between the phosphor and the spreader, and reflects the fluorescent light. The reflective region is disposed between the plurality of phosphor pieces, the reflective region reflecting the received excitation light while keeping a polarization characteristic of the received excitation light.

Growing community of inventors

Osaka, Japan

Yusaku Nishikawa