# US 11,906,889 B2 · Light source system and projection apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,906,889 B2 - Document ID: US11906889B2 - Status: Granted - Kind: B2 - Application number: 16/960,069 - Filed: 2018-03-28 - Published: 2022-02-03 - Granted: 2024-02-20 - Earliest claimed: 2018-01-04 - Assignees: Appotronics Corporation Limited - Applicants: Appotronics Corporation Limited - Inventors: Fei Hu; Haixiong Hou; Xiaofeng Tang; Yi Li - Web page: https://patentgrep.com/patent/US11906889B2 ## 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)} - H04N 9/3158: {for controlling the spectrum} - G02B 27/1006: {for splitting or combining different wavelengths (G02B27/1086, G02B27/141 take precedence)} - G03B 21/2013: {Plural light sources} - G03B 21/206: {Control of light source other than position or intensity} - G03B 21/2066: {Reflectors in illumination beam (in projection beam G03B21/28)} - G03B 21/208: {Homogenising, shaping of the illumination light} - G03B 33/08: Sequential recording or projection (G03B33/02, G03B33/04, G03B33/06 take precedence) - H04N 9/3152: {for shaping the light beam (beam shaping per se G02B27/09)} - H04N 9/3155: {for controlling the light source (light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406)} - H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)} - H04N 9/3164: {using multiple light sources} - H04N 9/3182: {Colour adjustment, e.g. white balance, shading or gamut (white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607)} - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A light source system and a projection apparatus are provided. The light source system includes a first light source, a second light source including a second blue laser light source, a wavelength conversion element configured to convert second blue laser light into excited light, and a controller. The first light source includes a first blue laser light source configured to emit first blue laser light, a red laser light source configured to emit red laser light, and a green laser light source configured to emit green laser light. The controller controls the first and second blue laser light sources, the red laser light source, and the green laser light source to combine the first blue laser light, the red laser light, and the green laser light to form light source light, or to combine the first blue laser light and the excited light to form the light source light. ## Claims ### Claim 1 A light source system, comprising: a first light source comprising a first blue laser light source configured to emit first blue laser light, a red laser light source configured to emit red laser light, and a green laser light source configured to emit green laser light; a second light source comprising a second blue laser light source; a wavelength conversion element configured to convert second blue laser light into excited light; and a controller configured to control ON/OFF states and powers of the first blue laser light source, the red laser light source, the green laser light source and the second blue laser light source in such a manner that color coordinates of light source light are capable of being dynamically switched. ### Claim 2 (depends on 1) The light source system according to claim 1, wherein when the controller controls to turn on the first blue laser light source, the red laser light source, and the green laser light source and to turn off the second blue laser light source, the first blue laser light, the red laser light and the green laser light are combined to form the light source light. ### Claim 3 (depends on 1) The light source system according to claim 1, wherein when the controller controls to turn on the first blue laser light source and the second blue laser light source and to turn off the red laser light source and the green laser light source, the first blue laser light and the excited light form the light source light. ### Claim 4 (depends on 1) The light source system according to claim 1, wherein the controller controls to combine the excited light with the first blue laser light and at least one of the red laser light and the green laser light to form the light source light. ### Claim 5 (depends on 4) The light source system according to claim 4, wherein when the controller controls to turn on the first blue laser light source and the second blue laser light source and to turn on at least one of the red laser light source and the green laser light source, the excited light is combined with the first blue laser light and at least one of the red laser light and the green laser light to form the light source light. ### Claim 6 (depends on 1) The light source system according to claim 1, wherein the controller is configured to adjust powers of the first blue laser light source, the red laser light source, the green laser light source and the second blue laser light source so as to adjust a range of color coordinates of the light source light. ### Claim 7 (depends on 1) The light source system according to claim 1, wherein the first blue laser light has a wavelength range that does not overlap with a wavelength range of the second blue laser light. ### Claim 8 (depends on 1) The light source system according to claim 1, further comprising: an adjustment device; and a first light splitting and combining element provided between the adjustment device and the wavelength conversion element and comprising a coating region and an edge region, wherein the excited light is incident to the edge region, wherein the adjustment device is configured to condense light emitted by the first light source to the coating region, and the first light splitting and combining element is configured to guide the light emitted by the first light source and the excited light which is yellow to exit in a same direction. ### Claim 9 (depends on 8) The light source system according to claim 8, wherein the coating region is configured to reflect the light emitted by the first light source, and the edge region is configured to transmit the yellow excited light. ### Claim 10 (depends on 9) The light source system according to claim 9, wherein the coating region is provided with a totally reflective film or a filter film, and wherein the filter film is configured to reflect light having a wavelength within a wavelength range corresponding to the light emitted by the first light source. ### Claim 11 (depends on 8) The light source system according to claim 8, further comprising: a relay lens provided between the wavelength conversion element and the first light splitting and combining element, wherein the yellow excited light emitted from the wavelength conversion element is incident to the first light splitting and combining element after being condensed by the relay lens; and a light homogenizing device configured to homogenize light exited from the first light splitting and combining element to obtain the light source light, wherein the adjustment device is further configured to adjust a divergence angle of a light beam emitted by the first light source so that the excited light exited from the first light splitting and combining element and the light emitted by the first light source are emitted at a same divergence angle. ### Claim 12 (depends on 1) The light source system according to claim 1, further comprising: an adjustment device adjacent to the red laser light source and the green laser light source; and a first light splitting and combining element provided between the adjustment device and the wavelength conversion element and comprising a coating region and an edge region, wherein the first blue laser light and the second blue laser light is incident to the edge region, wherein the adjustment device is configured to condense the red laser light and the green laser light to the coating region, and the first light splitting and combining element is configured to guide the second blue laser light, the red laser light, and the green laser light to the wavelength conversion element; wherein the wavelength conversion element is configured to reflect the red laser light and the green laser light, and wherein the red laser light, the green laser light, and the excited light are emitted from the wavelength conversion element to the edge region in a same direction; and wherein the edge region is configured to guide light emitted by the first light source and the excited light to exit in a same direction to obtain the light source light. ### Claim 13 (depends on 12) The light source system according to claim 12, wherein the coating region is configured to reflect the light emitted by the first light source, and the edge region is configured to reflect the first blue laser light and the second blue laser light and transmit the excited light. ### Claim 14 (depends on 12) The light source system according to claim 12, further comprising: a collecting lens group adjacent to the wavelength conversion element, wherein the adjustment device is configured to adjust a divergence angle of a light beam of the red laser light and a divergence angle of a light beam of the green laser light, in such a manner that after exiting from the first light splitting and combining element and being condensed by the collecting lens group, the second blue laser light, the red laser light, and the green laser light are incident onto the wavelength conversion element to form coincident light spots; and wherein the excited light which is yellow, the red laser light, and the green laser light are emitted from the wavelength conversion element, collimated by the collecting lens group and then incident to the edge region. ### Claim 15 (depends on 12) The light source system according to claim 12, further comprising: a second light splitting and combining element disposed between the adjustment device and the first light splitting and combining element and configure to guide the second blue laser light, the red laser light and the green laser light to the first light splitting and combining element. ### Claim 16 A projection apparatus, comprising a light source system, wherein the light source system comprises: a first light source comprising a first blue laser light source configured to emit first blue laser light, a red laser light source configured to emit red laser light, and a green laser light source configured to emit green laser light; a second light source comprising a second blue laser light source; a wavelength conversion element configured to convert second blue laser light into excited light; and a controller configured to control ON/OFF states and powers of the first blue laser light source, the red laser light source, the green laser light source and the second blue laser light source in such a manner that color coordinates of light source light is capable of being dynamically switched. ### Claim 17 (depends on 16) The projection apparatus according to claim 16, wherein when the controller controls to turn on the first blue laser light source, the red laser light source, and the green laser light source and to turn off the second blue laser light source, the first blue laser light, the red laser light and the green laser light are combined to form the light source light. ### Claim 18 (depends on 16) The projection apparatus according to claim 16, wherein when the controller controls to turn on the first blue laser light source and the second blue laser light source and to turn off the red laser light source and the green laser light source, the first blue laser light and the excited light form the light source light. ### Claim 19 (depends on 16) The projection apparatus according to claim 16, wherein the controller controls to combine the excited light with the first blue laser light and at least one of the red laser light and the green laser light to form the light source light. ### Claim 20 (depends on 19) The projection apparatus according to claim 19, wherein when the controller controls to turn on the first blue laser light source and the second blue laser light source and to turn on at least one of the red laser light source and the green laser light source, the excited light is combined with the first blue laser light and at least one of the red laser light and the green laser light to form the light source light.