# US 9,753,277 B2 · Wavelength conversion device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,753,277 B2 - Document ID: US9753277B2 - Status: Granted - Kind: B2 - Application number: 15/140,457 - Filed: 2016-04-27 - Published: 2017-02-16 - Granted: 2017-09-05 - Earliest claimed: 2015-08-11 - Assignees: Delta Electronics, Inc. - Applicants: Delta Electronics, Inc. - Inventors: Keh-Su Chang; Yen-I Chou; Chi Chen; Chun-Hsien Lu - Web page: https://patentgrep.com/patent/US9753277B2 ## CPC - G02B 26/008: {in the form of devices for effecting sequential colour changes, e.g. colour wheels} - G02B 5/0242: {by means of dispersed particles} - G02B 5/0284: {used in reflection} - G02B 5/0294: {adapted to provide an additional optical effect, e.g. anti-reflection or filter} - G02B 5/08: Mirrors {(vehicle mirrors involving special optical features B60R1/08)} - G02B 5/22: Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} - G02B 5/223: {containing organic substances, e.g. dyes, inks or pigments} - G02B 5/226: {Glass filters} - G02B 5/26: Reflecting filters (G02B5/28 takes precedence) - G03B 21/204: {using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197)} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - 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) ## Abstract A wavelength conversion device includes a substrate, a reflective member, and a wavelength conversion member. The reflective member is disposed on the substrate and includes a continuous-phase material and nano particles. The nano particles are distributed in the continuous-phase material. A refractive index of the continuous-phase material is different from a refractive index of the nano particles. The wavelength conversion member is disposed on the reflective member. The reflective member is configured to reflect the light converted from the wavelength conversion member to output. ## Claims ### Claim 1 A wavelength conversion device, comprising: a substrate; a reflective member disposed on the substrate, the reflective member comprising: a continuous-phase material; and a plurality of nano particles distributed in the continuous-phase material, wherein a refractive index of the continuous-phase material is different from a refractive index of the nano particles; and a wavelength conversion member disposed on the reflective member, wherein the reflective member is configured to reflect the light converted from the wavelength conversion member to output. ### Claim 2 (depends on 1) The wavelength conversion device of claim 1, wherein the continuous-phase material is an organic material or an inorganic material. ### Claim 3 (depends on 2) The wavelength conversion device of claim 2, wherein the organic material is acrylic, silicone, epoxy, TPX, compound resin, or glass-related rubber. ### Claim 4 (depends on 2) The wavelength conversion device of claim 2, wherein a refractive index of the organic material is in a range substantially from 1.3 to 1.55. ### Claim 5 (depends on 2) The wavelength conversion device of claim 2, wherein the inorganic material is transparent oxide-based glass. ### Claim 6 (depends on 2) The wavelength conversion device of claim 2, wherein the inorganic material comprises an oxide of a combination comprising at least one of selenium, phosphorus, boron, bismuth, aluminum, zirconium, zinc, alkali metal elements, alkaline earth elements. ### Claim 7 (depends on 2) The wavelength conversion device of claim 2, wherein a refractive index of the inorganic material is in a range substantially from 1.4 to 1.6. ### Claim 8 (depends on 2) The wavelength conversion device of claim 2, wherein the wavelength conversion member comprises the inorganic material. ### Claim 9 (depends on 1) The wavelength conversion device of claim 1, wherein a thickness of the reflective member is in a range substantially from 10 um to 3 mm. ### Claim 10 (depends on 9) The wavelength conversion device of claim 9, wherein the thickness of the reflective member is further in a range substantially from 30 um to 500 um. ### Claim 11 (depends on 9) The wavelength conversion device of claim 9, wherein a material forming the nano particles comprises at least one of silicon dioxide, bubbles, tantalum oxide, titanium oxide, magnesium fluoride, and barium sulfate. ### Claim 12 (depends on 1) The wavelength conversion device of claim 1, wherein a particle diameter of the nano particles is in a range substantially from 50 nm to 500 nm. ### Claim 13 (depends on 12) The wavelength conversion device of claim 12, wherein the particle diameter of the nano particles is further in a range substantially from 100 nm to 400 nm. ### Claim 14 (depends on 1) The wavelength conversion device of claim 1, wherein a concentration of the nano particles in the reflective member is in a range substantially from 30 wt % to 95 wt %. ### Claim 15 (depends on 14) The wavelength conversion device of claim 14, wherein the concentration of the nano particles in the reflective member is further in a range substantially from 50 wt % to 90 wt %. ### Claim 16 (depends on 1) The wavelength conversion device of claim 1, wherein a difference between the refractive index of the continuous-phase material and the refractive index of the nano particles is equal to or greater than 0.5. ### Claim 17 (depends on 1) The wavelength conversion device of claim 1, wherein the nano particles comprise a plurality of first sub-nano particles and a plurality of second sub-nano particles, a refractive index of the first sub-nano particles is greater than the refractive index of the continuous-phase material, and a refractive index of the second sub-nano particles is smaller than the refractive index of the continuous-phase material. ### Claim 18 (depends on 1) The wavelength conversion device of claim 1, wherein the wavelength conversion member is a phosphor powder layer.