# US 12,001,129 B2 · Light mixing module and laser projector having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,001,129 B2 - Document ID: US12001129B2 - Status: Granted - Kind: B2 - Application number: 17/991,918 - Filed: 2022-11-22 - Published: 2023-10-19 - Granted: 2024-06-04 - Earliest claimed: 2022-04-13 - Assignees: Benq Corporation - Applicants: Benq Corporation - Inventors: Kai-Jiun Wang; Hung-Chi Tsai; Shuang-Xi Lin - Web page: https://patentgrep.com/patent/US12001129B2 ## CPC - G03B 21/2033: {LED or laser light sources} - G03B 21/2013: {Plural light sources} - G03B 21/2073: {Polarisers in the lamp house (peculiar to electronic spatial light modulators H04N9/3197)} - G03B 21/208: {Homogenising, shaping of the illumination light} - 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 light mixing module is provided. The light mixing module includes a first laser array, a second laser array, and one or more laser polarized fold mirrors. The first laser array is configured for emitting a plurality of polarized light beams having a first polarization state. The second array is configured for emitting a plurality of polarized light beams having the first polarization state. The second laser array is disposed opposite to the first laser array. The one or more laser polarized fold mirrors are disposed between the first laser array and the second laser array. The one or more laser polarized fold mirrors reflect the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array. Each one of the one or more laser polarized fold mirrors is configured to direct light beams from at least two different directions. ## Claims ### Claim 1 A light mixing module, comprising: a first laser array configured for emitting a plurality of polarized light beams having a first polarization state; a second laser array configured for emitting a plurality of polarized light beams having the first polarization state, the second laser array disposed opposite to the first laser array; and one or more laser polarized fold mirrors disposed between the first laser array and the second laser array, the one or more laser polarized fold mirrors reflecting the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array; a condenser disposed at a light downstream side of the one or more laser polarized fold mirrors; and a third laser array configured for emitting a plurality of polarized light beams having a second polarization state, the third laser array disposed opposite to the condenser; wherein the one or more laser polarized fold mirrors reflecting the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array tilt towards the condenser; and wherein each one of the one or more laser polarized fold mirrors is configured to direct light beams from at least two different directions. ### Claim 2 (depends on 1) The light mixing module according to claim 1, wherein the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array are directed by the one or more laser polarized fold mirrors to the condenser and combined. ### Claim 3 (depends on 1) The light mixing module according to claim 1, wherein the third laser array comprises a first portion and a second portion; wherein the one or more laser polarized fold mirrors transmit the polarized light beams emitted by the third laser array; and wherein the first laser array and the first portion share a first group of laser polarized fold mirrors of the one or more laser polarized fold mirrors, and the second laser array and the second portion share a second group of laser polarized fold mirrors of the one or more laser polarized fold mirrors. ### Claim 4 (depends on 3) The light mixing module according to claim 3, wherein light sources of at least one same color are disposed in the first portion and the second portion of the third laser array. ### Claim 5 (depends on 3) The light mixing module according to claim 3, wherein the polarized light beams emitted by the first laser array are reflected by the first group of laser polarized fold mirrors to the condenser, polarized light beams emitted by the first portion of the third laser array are transmitted through the first group of laser polarized fold mirrors to the condenser, the polarized light beams emitted by the second laser array are reflected by the second group of laser polarized fold mirrors to the condenser, and polarized light beams emitted by the second portion of the third laser array are transmitted through the second group of laser polarized fold mirrors to the condenser. ### Claim 6 (depends on 1) The light mixing module according to claim 1, wherein laser sources of different colors are disposed in the first laser array and the second laser array in a symmetrical manner. ### Claim 7 A laser projector, comprising: a light source system, comprising: a light mixing module, comprising: a first laser array configured for emitting a plurality of polarized light beams having a first polarization state; a second laser array configured for emitting a plurality of polarized light beams having the first polarization state, the second laser array disposed opposite to the first laser array; one or more laser polarized fold mirrors disposed between the first laser array and the second laser array, the one or more laser polarized fold mirrors reflecting the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array; a condenser disposed at a light downstream side of the one or more laser polarized fold mirrors; and a third laser array configured for emitting a plurality of polarized light beams having a second polarization state, the third laser array disposed opposite to the condenser; wherein the one or more laser polarized fold mirrors reflecting the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array tilt towards the condenser; and wherein each one of the one or more laser polarized fold mirrors is configured to direct light beams from at least two different directions; and a lens module disposed at a light downstream side of the light mixing module; a light pipe disposed at a light downstream side of the light source system; and an illuminating system disposed at a light downstream side of the light pipe. ### Claim 8 (depends on 7) The laser projector according to claim 7, wherein the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array are directed by the one or more laser polarized fold mirrors to the condenser and combined. ### Claim 9 (depends on 8) The laser projector according to claim 8, wherein the third laser array comprises a first portion and a second portion; wherein the one or more laser polarized fold mirrors transmit the polarized light beams emitted by the third laser array; and wherein the first laser array and the first portion share a first group of laser polarized fold mirrors of the one or more laser polarized fold mirrors, and the second laser array and the second portion share a second group of laser polarized fold mirrors of the one or more laser polarized fold mirrors. ### Claim 10 (depends on 9) The laser projector according to claim 9, wherein light sources of at least one same color are disposed in the first portion and the second portion of the third laser array. ### Claim 11 (depends on 9) The laser projector according to claim 9, wherein the polarized light beams emitted by the first laser array are reflected by the first group of laser polarized fold mirrors to the condenser, polarized light beams emitted by the first portion of the third laser array are transmitted through the first group of laser polarized fold mirrors to the condenser, the polarized light beams emitted by the second laser array are reflected by the second group of laser polarized fold mirrors to the condenser, and polarized light beams emitted by the second portion of the third laser array are transmitted through the second group of laser polarized fold mirrors to the condenser. ### Claim 12 (depends on 7) The laser projector according to claim 7, wherein laser sources of different colors are disposed in the first laser array and the second laser array in a symmetrical manner.