# US 12,111,038 B2 · Light source device and display unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,038 B2 - Document ID: US12111038B2 - Status: Granted - Kind: B2 - Application number: 18/234,427 - Filed: 2023-08-16 - Published: 2024-02-08 - Granted: 2024-10-08 - Earliest claimed: 2013-07-31 - Assignees: Saturn Licensing LLC - Applicants: Saturn Licensing LLC - Inventors: Koichi Yamamoto; Kenji Kobayashi; Yasuhiro Nishida - Web page: https://patentgrep.com/patent/US12111038B2 ## CPC - F21V 13/08: the elements being filters or photoluminescent elements and reflectors - F21V 9/08: for producing coloured light, e.g. monochromatic; for reducing intensity of light (with provision for controlling the colour F21V9/40) - F21V 9/30: Elements containing photoluminescent material distinct from or spaced from the light source (shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40) - F21V 13/02: Combinations of only two kinds of elements - F21V 13/14: the elements being filters or photoluminescent elements, reflectors and refractors - G02F 1/133603: {with LEDs} - G02F 1/133605: {including specially adapted reflectors} - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - G02F 1/133609: {including means for improving the color mixing, e.g. white} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - H10W 72/07554: {changes in dispositions} - H10W 72/547: {Dispositions of multiple bond wires} - H10W 72/884: {Die-attach connectors and bond wires} - H10W 74/00: Encapsulations, e.g. protective coatings - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 ## Abstract A light source device includes: a substrate; a plurality of light sources disposed on the substrate; a wavelength conversion member disposed to face the plurality of light sources; and a diffusion member disposed between the wavelength conversion member and the plurality of light sources, and configured to uniformize distribution of traveling direction angle of incident light. ## Claims ### Claim 1 A display unit comprising: a light source device configured to emit illumination light; a display section configured to display an image using the illumination light from the light source device, wherein the light source device comprising: a substrate; a plurality of light sources disposed on the substrate; a wavelength conversion member comprising wavelength conversion material and disposed to face the plurality of light sources, some light from the plurality of light sources passes through the wavelength conversion member in an oblique direction without colliding with the wavelength conversion material and is emitted from the wavelength conversion member, the wavelength conversion material including quantum dot particles; and a reflective sheet disposed in a region on the substrate, the region being different from a region provided with the plurality of light sources, wherein the reflective sheet has filter characteristics allowing a reflectance to light that is wavelength-converted by the wavelength conversion member, to be different than a reflectance to light emitted from each of the light sources in which a majority of the wavelength-converted light incident on the reflective sheet is reflected and a majority of visible light incident on the reflective sheet from all other wavelengths from each of the light sources is reflected, a portion of light reflected off of the reflective sheet propagates to the wavelength conversion member and through the wavelength conversion member in an oblique direction. ### Claim 2 (depends on 1) The display unit according to claim 1, comprising a first prism sheet is located between the wavelength conversion member and the plurality of light sources, wherein the first prism sheet comprises a plurality of first prisms on a first surface of the first prism sheet, and each first prism of the plurality of first prisms extends away from the first surface. ### Claim 3 (depends on 1) The display unit according to claim 1, wherein each light source of the light sources further comprises a sealing member being formed substantially flat by sealant. ### Claim 4 (depends on 1) The display unit according to claim 1, wherein each light source of the light sources further comprises a sealing member being formed in a dome lens shape by sealant to form a sealing lens. ### Claim 5 (depends on 1) The display unit according to claim 1, further comprises a back chassis disposed on an opposite side of the substrate of the display section. ### Claim 6 (depends on 1) The display unit according to claim 1, wherein the portion of light reflected off of the reflective sheet that propagates to the wavelength conversion member light and through the wavelength conversion member in the oblique direction propagates therethrough without colliding with the wavelength conversion material. ### Claim 7 (depends on 1) The display unit according to claim 1, further comprising a diffusion member disposed between the wavelength conversion member and the plurality of light sources, the diffusion member is configured to cause uniform distribution of traveling direction angle of incident light, the diffusion member has a shaped surface. ### Claim 8 (depends on 7) The display unit according to claim 7, wherein the diffusion member with the shaped surface has optical elements two-dimensionally arranged on a surface, each of the optical elements having a predetermined shape. ### Claim 9 (depends on 1) The display unit according to claim 1, wherein each of the light sources has a light emitting element chip that is sealed by sealant. ### Claim 10 (depends on 1) The display unit according to claim 1, wherein each of the light sources has a light emitting element chip on a chip mounting layer that has a light reflective function. ### Claim 11 A light source device comprising: a substrate; a plurality of light sources disposed on the substrate; a wavelength conversion member comprising wavelength conversion material and disposed to face the plurality of light sources, a portion of light from the plurality of light sources passes through the wavelength conversion member in an oblique direction without colliding with the wavelength conversion material and is emitted as it is from the wavelength conversion member; and a reflective sheet disposed in a region on the substrate, the region being different from a region provided with the plurality of light sources, wherein the reflective sheet has filter characteristics allowing a reflectance to light that is wavelength-converted by the wavelength conversion member, to be different than a reflectance to light emitted from each of the light sources in which a majority of the wavelength-converted light incident on the reflective sheet is reflected and a majority of visible light incident on the reflective sheet from all other wavelengths from each of the light sources is reflected, a portion of light reflected off of the reflective sheet propagates to the wavelength conversion member and through the wavelength conversion member in an oblique direction. ### Claim 12 (depends on 11) The light source device according to claim 11, further comprising a cut filter disposed over the reflective sheet, the cut filter allowing a transmittance to light that is wavelength-converted by the wavelength conversion member to be lower than a transmittance to light emitted from each of the light sources. ### Claim 13 (depends on 11) The light source device according to claim 11, wherein each of the plurality of light sources includes a light emitting element configured of an LED. ### Claim 14 (depends on 11) The light source device according to claim 11, further comprises a diffusion member between the wavelength conversion member and the plurality of light sources, the diffusion member has a shaped surface. ### Claim 15 (depends on 11) The light source device according to claim 11, wherein the lighted sources are packaged LEDs. ### Claim 16 (depends on 11) The light source device according to claim 11, wherein each of the light sources has a light emitting element chip and a sealant material that seals the light emitting element chip on the substrate. ### Claim 17 (depends on 16) The light source device according to claim 16, wherein the sealant is formed into a dome lens and a following condition is satisfied, 0.65≤h/r≤1 where h is a height of the dome lens and r is a radius of the dome lens. ### Claim 18 (depends on 14) The light source device according to claim 14, further comprising a first prism sheet disposed between the wavelength conversion member and the diffusion member and having a plurality of first prisms on a surface, each of the plurality of first prisms extending in a first direction. ### Claim 19 (depends on 18) The light source device according to claim 18, further comprising a second prism sheet disposed between the wavelength conversion member and the diffusion member, and having a plurality of second prisms on a surface, each of the plurality of second prisms extending in a second direction orthogonal to the first direction. ### Claim 20 (depends on 11) The light source device according to claim 11, wherein each of the light sources has a light emitting element chip on a chip mounting layer that has a light reflective function, and wherein the light source device further comprises a cut filter disposed to cover the reflective sheet and having filter characteristics, the filter characteristics allowing a transmittance to light that is wavelength-converted by the wavelength conversion member, to be lower than a transmittance to light emitted from each of the light sources.