# US 10,481,474 B2 · Wavelength conversion filter module and illumination system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,481,474 B2 - Document ID: US10481474B2 - Status: Granted - Kind: B2 - Application number: 15/952,243 - Filed: 2018-04-13 - Published: 2018-11-01 - Granted: 2019-11-19 - Earliest claimed: 2017-04-27 - Assignees: Coretronic Corporation - Applicants: Coretronic Corporation - Inventors: Chien-Chung Liao - Web page: https://patentgrep.com/patent/US10481474B2 ## CPC - G03B 21/204: {using secondary light emission, e.g. luminescence or fluorescence (using different colours G03B33/00; if related to video signals H04N9/3197)} - G03B 33/08: Sequential recording or projection (G03B33/02, G03B33/04, G03B33/06 take precedence) - G03B 21/16: Cooling; Preventing overheating - 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 filter module and an illumination system are provided. The wavelength conversion filter module includes a carrier and a wavelength conversion filter unit. The wavelength conversion filter unit is located in a wavelength conversion filter region of the carrier, and the wavelength conversion filter unit includes a filter reflective device, a wavelength conversion device, and a first filter device disposed on the carrier in order. The first filter device is suitable for allowing the excitation beam to pass through. The wavelength conversion device is suitable for converting the excitation beam into a conversion beam. The conversion beam includes a specific color beam and a color beam other than the specific color beam. The filter reflective device is suitable for reflecting the specific color beam and absorbing the color beam other than the specific color beam. The reflected specific color beam passes through the first filter device. ## Claims ### Claim 1 A wavelength conversion filter module, comprising: a carrier having a plurality of optical regions and adapted to move to allow the plurality of optical regions to receive an excitation beam in order, wherein at least one of the plurality of optical regions is a wavelength conversion filter region; and a wavelength conversion filter unit located in the wavelength conversion filter region and comprising a filter reflective device, a wavelength conversion device, and a first filter device disposed on the carrier in order, wherein the first filter device is suitable for allowing the excitation beam incident on the wavelength conversion filter unit to pass through, the wavelength conversion device is suitable for converting the excitation beam into a conversion beam, the conversion beam comprises a specific color beam and a color beam other than the specific color beam, the filter reflective device is suitable for reflecting the specific color beam and absorbing the color beam other than the specific color beam, and the first filter device is suitable for allowing the specific color beam to pass through and reflecting a color beam other than the specific color beam and the excitation beam. ### Claim 2 (depends on 1) The wavelength conversion filter module of claim 1, wherein the wavelength conversion device comprises one or a plurality of wavelength conversion layers, and the plurality of wavelength conversion layers have different or partially overlapped excitation spectrums. ### Claim 3 (depends on 2) The wavelength conversion filter module of claim 2, wherein the wavelength conversion device comprises a first wavelength conversion layer and a second wavelength conversion layer, the second wavelength conversion layer is located between the first wavelength conversion layer and the filter reflective device, and a peak value of the excitation spectrum of the first wavelength conversion layer is less than a peak value of the excitation spectrum of the second wavelength conversion layer. ### Claim 4 (depends on 1) The wavelength conversion filter module of claim 1, wherein the wavelength conversion filter unit further comprises: a second filter device disposed between the filter reflective device and the wavelength conversion device, wherein the second filter device is suitable for reflecting the specific color beam and allowing the color beam other than the specific color beam to pass through. ### Claim 5 (depends on 1) The wavelength conversion filter module of claim 1, wherein the filter reflective device comprises a reflective layer and a second filter device, the second filter device is disposed between the reflective layer and the wavelength conversion device, and the second filter device is suitable for reflecting the specific color beam and allowing the color beam other than the specific color beam to pass through. ### Claim 6 (depends on 1) The wavelength conversion filter module of claim 1, wherein the filter reflective device comprises a pigment corresponding to the specific color beam or an absorbent glass powder corresponding to the specific color beam. ### Claim 7 A wavelength conversion filter module, comprising: a carrier having a plurality of optical regions and adapted to move to allow the plurality of optical regions to receive an excitation beam in order, wherein at least one of the plurality of optical regions is a wavelength conversion filter region, and the carrier has an opening overlapped with the wavelength conversion filter region; and a wavelength conversion filter unit located in the wavelength conversion filter region and comprising a second filter device, a wavelength conversion device, and a first filter device disposed on the carrier in order, wherein the first filter device is suitable for allowing the excitation beam incident on the wavelength conversion filter unit to pass through, the wavelength conversion device is suitable for converting the excitation beam into a conversion beam, the conversion beam comprises a specific color beam and a color beam other than the specific color beam, the second filter device is suitable for reflecting the specific color beam and allowing the color beam other than the specific color beam to pass through, and the first filter device is suitable for allowing the specific color beam to pass through and reflecting a color beam other than the specific color beam and the excitation beam. ### Claim 8 (depends on 7) The wavelength conversion filter module of claim 7, wherein the wavelength conversion device comprises one or a plurality of wavelength conversion layers, and the plurality of wavelength conversion layers have different or partially overlapped excitation spectrums. ### Claim 9 (depends on 8) The wavelength conversion filter module of claim 8, wherein the wavelength conversion device comprises a first wavelength conversion layer and a second wavelength conversion layer, the second wavelength conversion layer is located between the first wavelength conversion layer and the second filter device, and a peak value of the excitation spectrum of the first wavelength conversion layer is less than a peak value of the excitation spectrum of the second wavelength conversion layer. ### Claim 10 An illumination system, comprising: an excitation light source adapted to provide an excitation beam; and a wavelength conversion filter module disposed on a transmission path of the excitation beam and comprising: a carrier having a plurality of optical regions and adapted to move to allow the plurality of optical regions to receive the excitation beam in order, wherein at least one of the plurality of optical regions is a wavelength conversion filter region; and a wavelength conversion filter unit located in the wavelength conversion filter region and comprising a filter reflective device, a wavelength conversion device, and a first filter device disposed on the carrier in order, wherein the first filter device is suitable for allowing the excitation beam to pass through, the wavelength conversion device is suitable for converting the excitation beam into a conversion beam, the conversion beam comprises a specific color beam and a color beam other than the specific color beam, the filter reflective device is suitable for reflecting the specific color beam and absorbing the color beam other than the specific color beam, and the first filter device is suitable for allowing the specific color beam to pass through and reflecting a color beam other than the specific color beam and the excitation beam. ### Claim 11 (depends on 10) The illumination system of claim 10, wherein the wavelength conversion device comprises one or a plurality of wavelength conversion layers, and the plurality of wavelength conversion layers have different or partially overlapped excitation spectrums. ### Claim 12 (depends on 11) The illumination system of claim 11, wherein the wavelength conversion device comprises a first wavelength conversion layer and a second wavelength conversion layer, the second wavelength conversion layer is located between the first wavelength conversion layer and the filter reflective device, and a peak value of the excitation spectrum of the first wavelength conversion layer is less than a peak value of the excitation spectrum of the second wavelength conversion layer. ### Claim 13 (depends on 10) The illumination system of claim 10, wherein the wavelength conversion filter unit further comprises: a second filter device disposed between the filter reflective device and the wavelength conversion device, wherein the second filter device is suitable for reflecting the specific color beam and allowing the color beam other than the specific color beam to pass through. ### Claim 14 (depends on 10) The illumination system of claim 10, wherein the filter reflective device comprises a reflective layer and a second filter device, the second filter device is disposed between the reflective layer and the wavelength conversion device, and the second filter device is suitable for reflecting the specific color beam and allowing the color beam other than the specific color beam to pass through. ### Claim 15 (depends on 10) The illumination system of claim 10, wherein the filter reflective device comprises a pigment corresponding to the specific color beam or an absorbent glass powder corresponding to the specific color beam. ### Claim 16 An illumination system, comprising: an excitation light source adapted to provide an excitation beam; and a wavelength conversion filter module disposed on a transmission path of the excitation beam and comprising: a carrier having a plurality of optical regions and adapted to move to allow the plurality of optical regions to receive the excitation beam in order, wherein at least one of the plurality of optical regions is a wavelength conversion filter region, and the carrier has an opening overlapped with the wavelength conversion filter region; and a wavelength conversion filter unit located in the wavelength conversion filter region and comprising a filter reflective device, a second filter device, a wavelength conversion device, and a first filter device disposed on the carrier in order, wherein the first filter device is suitable for allowing the excitation beam incident on the wavelength conversion filter unit to pass through, the wavelength conversion device is suitable for converting the excitation beam into a conversion beam, the conversion beam comprises a specific color beam and a color beam other than the specific color beam, the second filter device is suitable for reflecting the specific color beam and allowing the color beam other than the specific color beam to pass through, and the first filter device is suitable for allowing the specific color beam to pass through and reflecting a color beam other than the specific color beam and the excitation beam. ### Claim 17 (depends on 16) The illumination system of claim 16, wherein the wavelength conversion device comprises one or a plurality of wavelength conversion layers, and the plurality of wavelength conversion layers have different or partially overlapped excitation spectrums. ### Claim 18 (depends on 17) The illumination system of claim 17, wherein the wavelength conversion device comprises a first wavelength conversion layer and a second wavelength conversion layer, the second wavelength conversion layer is located between the first wavelength conversion layer and the filter reflective device, and a peak value of the excitation spectrum of the first wavelength conversion layer is less than a peak value of the excitation spectrum of the second wavelength conversion layer.