# US 11,906,888 B2 · Light source apparatus and projector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,888 B2 - Document ID: US11906888B2 - Status: Granted - Kind: B2 - Application number: 17/212,710 - Filed: 2021-03-25 - Published: 2021-09-30 - Granted: 2024-02-20 - Earliest claimed: 2020-03-26 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Shigekazu Aoki; Shingo Komiyama; Junichi Suzuki - Web page: https://patentgrep.com/patent/US11906888B2 ## CPC - G03B 21/2013: {Plural light sources} - G03B 21/16: Cooling; Preventing overheating - G03B 21/204: {using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197)} - H04N 9/3105: {for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators (simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10)} - H04N 9/3144: {Cooling systems (cooling of liquid crystal cells in general G02F1/133382; cooling of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/16)} - H04N 9/3158: {for controlling the spectrum} - H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)} - H04N 9/3164: {using multiple light sources} - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A light source apparatus includes a first light source that emits first light belonging to a first wavelength band, a second light source that emits second light belonging to a second wavelength band, a wavelength converter that contains a phosphor and converts the first light into third light belonging to a third wavelength band different from the first, a first heat dissipation member that includes a plurality of first fins and dissipates heat generated by the first light source, a second heat dissipation member that includes a plurality of second fins and dissipates heat generated by the second light source, and a first direction wherein first channels, specified by the gaps between the first fins and along which a refrigerant is supplied, extend coincides with a second direction wherein second channels, specified by the gaps between the second fins and along which the refrigerant is supplied, extend. ## Claims ### Claim 1 A light source apparatus comprising: a first light source that emits first light that belongs to a first wavelength band; a second light source that emits second light that belongs to a second wavelength band; a wavelength converter that contains a phosphor and converts the first light emitted from the first light source into third light that belongs to a third wavelength band different from the first wavelength band; a first heat dissipation member that includes a first base and a plurality of first fins and dissipates heat generated by the first light source, the plurality of first fins extending from the first base in a first extending direction; and a second heat dissipation member that includes a second base and a plurality of second fins and dissipates heat generated by the second light source, the plurality of second fins extending from the second base in a second extending direction perpendicular to the first extending direction, wherein a first direction in which first channels, which are specified by gaps between the plurality of first fins and along which a refrigerant is supplied, extend coincides with a second direction in which second channels, which are specified by gaps between the plurality of second fins and along which the refrigerant is supplied, extend, the first direction and the second direction being perpendicular to the first extending direction and the second extending direction. ### Claim 2 (depends on 1) The light source apparatus according to claim 1, wherein a direction in which the wavelength converter outputs the third light coincides with a direction in which the second light source outputs the second light. ### Claim 3 (depends on 2) The light source apparatus according to claim 2, wherein the first and second directions are perpendicular to the direction in which the second light source outputs the second light. ### Claim 4 (depends on 1) The light source apparatus according to claim 1, wherein the first heat dissipation member is disposed between the second heat dissipation member and the first light source. ### Claim 5 (depends on 1) The light source apparatus according to claim 1, further comprising a supplier that supplies the first channels and the second channels with the refrigerant. ### Claim 6 (depends on 5) The light source apparatus according to claim 5, wherein the supplier includes a first fan provided on an upstream of the first channels and the second channels and a second fan provided on a downstream of the first channels and the second channels. ### Claim 7 (depends on 5) The light source apparatus according to claim 5, wherein the first and second fans are each an axial fan. ### Claim 8 (depends on 1) The light source apparatus according to claim 1, wherein the plurality of first fins include a plurality of small fin members and a plurality of large fin members larger than the small fin members, the first heat dissipation member includes a first portion where the plurality of small fin members are disposed, a second portion where the plurality of large fin members are disposed, and a stepped section formed of the first portion and the second portion, and the second heat dissipation member is disposed at the stepped section. ### Claim 9 (depends on 1) A projector comprising: the light source apparatus according to claim 1; a light modulator that modulates light from the light source apparatus in accordance with image information; and a projection optical apparatus that projects the light modulated by the light modulator. ### Claim 10 (depends on 9) The projector according to claim 9, further comprising a case that accommodates the light source apparatus, the light modulator, and the projection optical apparatus, the first light source and the second light source are arranged in a thickness direction of the case. ### Claim 11 (depends on 10) The projector according to claim 10, wherein the refrigerant in the first channels and the second channels is supplied along a bottom surface of the case. ### Claim 12 (depends on 1) The light source apparatus according to claim 1, further comprising a light combiner that combines the second light emitted from the second light source and the third light emitted from the wavelength converter with each other.