Patent application EP20169531A (EP), filed 2020-04-15
Publication number: EP3737090A1
Title: LIGHT SOURCE DEVICE, OPTICAL SCANNER, DISPLAY SYSTEM, AND MOBILE OBJECT
Abstract: [0001]    An optical scanner comprising a light source device with a plurality of light sources (111(r), 111(g), and 111(b)) configured to output a plurality of laser beams of different color components, wherein a ratio in maximum output power between the plurality of laser beams output from the plurality of light sources (111(r), 111(g), and 111(b)) is variable, and a light deflector (13) configured to deflect light emitted from the light source device to scan in a first scanning direction and a second scanning direction, the second scanning direction being orthogonal to the first scanning direction.
IPC codes: B60K  35/    00            A I
G02B  27/    01            A I
H04N   9/    31            A I
Claims: number: 1
text: A light source device (11) comprising:
number: 2
text: The light source device (11) according to claim 1, further comprising a temperature detector (120) configured to detect an ambient temperature of the plurality of light sources (111(r), 111(g), and 111(b),
wherein the ratio in maximum output power between the plurality of laser beams output from the plurality of light sources (111(r), 111(g), and 111(b)) is variable based on a detection result of the temperature detector (120).
number: 3
text: The light source device (11) according to claim 2,
wherein a ratio in output power between the plurality of laser beams output from the plurality of light sources (111(r), 111(g), and 111(b)) is variable based on the detection result of the temperature detector (120).
number: 4
text: The light source device (11) according to any one of claims 1 to 3,
wherein the plurality of laser beams includes a laser beam of a red component, a laser beam of a green component, and a laser beam of a blue component, and
wherein the ratio in output power between the plurality of laser beams is variable so as to maintain white balance constant.
number: 5
text: The light source device (11) according to any one of claims 1 to 4, further comprising an output power detector (119) configured to detect output power of a bundle of the plurality of laser beams,
wherein the output power of the bundle of the plurality of laser beams is variable based on a detection result of the output power detector (119).
number: 6
text: The light source device (11) according to any one of claim 1 to 5, wherein the ratio in maximum output power between the plurality of laser beams output from the plurality of light sources changes according to a control signal output from a controller (17),
wherein the controller (17) determines the ratio in maximum output power so as to maintain white balance constant.
number: 7
text: An optical scanner (10) comprising:
number: 8
text: The optical scanner (10) according to claim 7, further comprising a controller (17) configured to control the light source device (11) to emit light based on image data and control the light deflector (13) to form an image with the light based on the image data within an image area (61) of a scanning range to be irradiated with the scanning light,
wherein the controller (17) controls the output power of the plurality of laser beams so as to change the ratio in maximum output power between the plurality of laser beams.
number: 9
text: The optical scanner (10) according to claim 6, further comprising a screen (15) to be scanned with the scanning light by the light deflector (13),
wherein the image area (61) on which the image is formed is on the screen (15).
number: 10
text: A display system (1) comprising:
number: 11
text: A mobile object (1A) comprising the display system (1) according to claim 10,
wherein the reflector is a windshield.
Office action: search_report, dated 2020-11-11
Rejection reasons: novelty_epc_54
inventive_step_epc_56
Prior art cited: ref_id: JP2014186078A
ref_type: patent
severity: background
ref_id: JP2017106977A
ref_type: patent
severity: background
ref_id: US2019018239A1
ref_type: patent
severity: background
ref_id: US2015260984A1
ref_type: patent
severity: background
ref_id: US2013207950A1
ref_type: patent
severity: background
ref_id: JP2017097153A
ref_type: patent
severity: background
ref_id: US2013207950
ref_type: patent
severity: background
ref_id: US2015260984
ref_type: patent
severity: obviousness
ref_id: US2019018239
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2020-11-11)