# US 2017/0284635 A1 · Illumination device and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0284635 A1 - Document ID: US20170284635A1 - Status: Published application - Kind: A1 - Application number: 15/484,541 - Filed: 2017-04-11 - Published: 2017-10-05 - Earliest claimed: 2012-11-09 - Assignees: Saturn Licensing LLC - Applicants: Saturn Licensing LLC - Inventors: Hirohisa Ishino - Web page: https://patentgrep.com/patent/US20170284635A1 ## CPC - G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell} - G02B 6/0023: {provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source} - G02B 6/0026: {Wavelength selective element, sheet or layer, e.g. filter or grating} - G02F 1/133615: {Edge-illuminating devices, i.e. illuminating from the side} - F21Y 2115/10: Light-emitting diodes [LED] - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - 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 - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED ## Abstract Provided is an illumination device that makes it possible to enhance utilization efficiency of light, and a display device that includes the illumination device. The illumination device includes: a light source that is configured to generate light of a first wavelength; a luminescent body that is configured to wavelength-convert the light of the first wavelength to light of a second wavelength, the second wavelength being different from the first wavelength; and a wavelength selective filter that is provided on a light-incident side of the luminescent body, the wavelength selective filter being configured to transmit the light of the first wavelength and to reflect the light of the second wavelength. ## Claims ### Claim at position 1 1-14. (canceled) ### Claim 15 A display device comprising: a light source that is configured to generate light of a blue light having a first wavelength range; a quantum dot material in a cured resin configured to convert some of the blue light to green light having a second wavelength range and to red light having a third wavelength range, the quantum dot material in the cured resin being positioned to receive the blue light; a wavelength selective filter that is provided outside the cured resin, the wavelength selective filter being configured to transmit the light of the first wavelength range and to reflect the light of the second and third wavelength ranges, the wavelength selective filter being positioned to receive the green and red light; a light guide plate positioned to receive the receive the green light, red light, and unconverted blue light; a reflection member on a side of the light guide plate; and a display panel on another side of the light guide plate opposite the side, wherein the light guide plate and reflection member cause the light received by the light guide plate to propagate to the display panel. ### Claim 16 (depends on 15) The display device according to claim 15, wherein the source is an edge type light source and the light received by light guide plate is along an edge of the light guide plate perpendicular to the reflection member and display panel. ### Claim 16 (depends on 15) The display device according to claim 15, wherein a width of the wavelength selective filter is larger than a width of the cured resin. ### Claim 18 (depends on 16) The display device according to claim 16, wherein the source is a series of light emitting diodes. ### Claim 19 (depends on 18) The display device according to claim 18, wherein at least two sets of series of light emitting diodes, the quantum dot material in the cured resin, and the wavelength selection filter are position at at least one additional edge of the light guide plate. ### Claim 20 A display device provided with a liquid crystal panel and an illumination device on a rear side of the liquid crystal panel, the illumination device comprising: a light source that is configured to generate light of a first wavelength range; quantum dot material to wavelength-convert the light of the first wavelength range to light of a second wavelength range, the second wavelength range being different from the first wavelength range; a container that accommodates the quantum dot material; and a wavelength selective filter that is provided on a portion of an outer surface of the container, the portion includes a light-incident side of the container and at least part of one or more sides of the container which are adjacent to the light-incident side of the container so as to be in direct contact therewith such that a side of the container which is opposite to the light-incident side is not included in the portion, the wavelength selective filter being configured to transmit the light of the first wavelength range and to reflect the light of the second wavelength range. ### Claim 21 (depends on 20) The display device according to claim 20, wherein the container includes, in an inside of the container, an accommodating section of the quantum dot material, and a width of the wavelength selective filter is larger than a width of the accommodating section. ### Claim 22 (depends on 21) The display device according to claim 21, wherein the container has a shape of a cuboid. ### Claim 23 (depends on 20) The display device according to claim 20, wherein the light-incident side of the container that faces the light source of the container is curved convexly toward the light source. ### Claim 24 (depends on 20) The display device according to claim 20, wherein the quantum dot material converts blue light to red light or green light. ### Claim 25 (depends on 20) The display device according to claim 20, further comprising an optical member, the optical member including a light-incident surface that faces the quantum dot material. ### Claim 26 (depends on 25) The display device according to claim 25, wherein the optical member is a light guide plate, and the light-incident surface is an end surface of the light guide plate. ### Claim 27 (depends on 25) The display device according to claim 25, wherein the optical member includes a second surface that is patterned. ### Claim 28 A display unit comprising: a liquid crystal panel; a light emitting device provided on back face side of the liquid crystal panel, wherein the light emitting device comprising: a light source; a light guide plate including a first light incident surface, the first light incident surface facing the light source and extending in a lateral direction, the light guide plate having a surface parallel to the liquid crystal panel and perpendicular to the first light incident surface; a quantum dot member provided between the light source and the first light incident surface; and a wavelength selective filter that is provided outside the quantum dot member, the wavelength selective filter being configured to transmit the blue light of a first wavelength range and to reflect green and red light of a second and third wavelength range, respectively, the wavelength selective filter being positioned to receive the green and red light generated in the quantum dot member. ### Claim 29 (depends on 28) The display unit according to claim 28, wherein the quantum dot member crosses a first region and extending to a second region outside the first region, the first region being defined by the direct path of light from the center of the light emitting device to an upper edge of the first light incident surface and the direct path of light from the center of the light emitting device and a lower edge of the first light incident surface. ### Claim 30 (depends on 29) The display unit according to claim 29, wherein the quantum dot member extends in the lateral direction. ### Claim 31 (depends on 30) The display unit according to claim 30, wherein the light guide plate comprises a second light incident surface opposing the first light incident surface, wherein the second light incident surface faces a second light source and extending in the lateral direction and the light incident surfaces are end faces of the light guide plate. ### Claim 32 (depends on 31) The display unit according to claims 31, wherein the quantum dot member a resin sheet. ### Claim 33 (depends on 25) The display device according to claim 25, wherein the light guide plate having a patterned surface on one of its sides. ### Claim 34 A display unit comprising: a liquid crystal panel; a light emitting device provided on back face side of the liquid crystal panel, wherein the light emitting device comprising: a light source; a light guide plate including a first light incident surface, the first light incident surface facing the light source and extending in a lateral direction, the light guide plate having a surface parallel to the liquid crystal panel and perpendicular to the first light incident surface; a quantum dot member provided between the light source and the first light incident surface; and a reflection member on a side of the light guide plate; and wherein the light guide plate and reflection member cause the light received by the light guide plate to propagate to the display panel, and wherein the quantum dot member crosses a first region and extending to a second region outside the first region, the first region being defined by the direct path of light from the center of the light emitting device to an upper edge of the first light incident surface and the direct path of light from the center of the light emitting device and a lower edge of the first light incident surface.