# US 10,120,189 B2 · Heads-up display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,120,189 B2 - Document ID: US10120189B2 - Status: Granted - Kind: B2 - Application number: 15/316,959 - Filed: 2015-05-29 - Published: 2017-04-27 - Granted: 2018-11-06 - Earliest claimed: 2014-06-09 - Assignees: Nippon Seiki Co., Ltd. - Applicants: Nippon Seiki Co., Ltd. - Inventors: Maiko Saito; Yuichi Takahashi; Takuro Hirokawa; Takashi Yamazoe; Kazuo Morohashi - Web page: https://patentgrep.com/patent/US10120189B2 ## CPC - G02B 27/0149: {characterised by mechanical features (G02B27/0176 takes precedence)} - B60K 35/10: Input arrangements, i.e. from user to vehicle, associated with vehicle functions or specially adapted therefor - B60K 35/233: controlling the size or position in display areas of virtual images depending on the condition of the vehicle or the driver - B60K 35/81: for controlling displays - G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)} - G03B 21/142: {Adjusting of projection optics} - G03B 21/28: Reflectors in projection beam {(in illumination beam G03B21/2066)} - G06F 3/013: {Eye tracking input arrangements (G06F3/015 takes precedence)} - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G09G 3/02: by tracing or scanning a light beam on a screen - B60K 2360/29: Holographic features - B60K 2360/334: Projection means - B60K 2360/347: Optical elements for superposition of display information - G02B 2027/0127: {comprising devices increasing the depth of field} - G02B 2027/0145: {creating an intermediate image} - G02B 2027/0159: {with mechanical means other than scaning means for positioning the whole image} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES - 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) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract The objective of the present invention is to provide a heads-up display device able to efficiently orient image light towards a viewer by means of a simple configuration. The heads-up display device is provided with: a projection unit that emits projection light depicting a display image; a first reflection unit and second reflection unit that reflect the projection light exiting the projection unit towards a transmissive screen; and the transmissive screen that outputs image light towards an observer by transmitting/scattering the projection light. By adjusting the angle of the light axis of the projection light entering the transmissive screen by rotating the first reflection unit and second reflection unit, the angle of the image light exiting the transmissive screen is adjusted. ## Claims ### Claim 1 A heads-up display device for projecting image light onto a transmissive reflective surface to cause a virtual image based on the image light to be visually recognized together with a real view through the transmissive reflective surface, comprising: a projection unit for emitting projection light forming a display image; a transmissive screen for orienting the image light obtained by transmitting and diffusing the projection light toward the transmissive reflective surface; and an optical axis adjustment unit for adjusting an angle of an optical axis of the projection light incident on the transmissive screen, the optical axis adjustment unit being arranged between the projection unit and the transmissive screen and including a first reflector for reflecting the projection light emitted by the projection unit, a second reflector for reflecting the projection light reflected by the first reflector, and an actuator for rotating the first reflector and the second reflector. ### Claim 2 (depends on 1) The heads-up display device according to claim 1, wherein: the projection unit includes a projector lens for imaging the projection light on the transmissive screen; and the optical axis adjustment unit causes a projected image distance of the projection light adjusted within a predetermined angle range between the projection unit and the transmissive screen to fall within a projected image plane depth of the projector lens. ### Claim 3 (depends on 1) The heads-up display device according to claim 1, wherein the optical axis adjustment unit can adjust the projection light to at least first projection light along a first optical axis, second projection light along a second optical axis, and third projection light along a third optical axis, whose angles incident on the transmissive screen are different from one another, and the first projection light, the second projection light, and the third projection light intersect at a predetermined point. ### Claim 4 (depends on 3) The heads-up display device according to claim 3, wherein the transmissive screen has a surface having the predetermined point. ### Claim 5 (depends on 1) The heads-up display device according to claim 1, wherein the actuator includes a common actuator for rotating the first reflector and the second reflector and rotate the first reflector and the second reflector at a predetermined ratio of rotation. ### Claim 6 (depends on 1) The heads-up display device according to claim 1, wherein the actuator rotates the second reflector while moving the second reflector on a locus of a predetermined ellipse; and the predetermined ellipse has a first focal point at which a part of the first reflector is disposed and a second focal point at which a part of the transmissive screen is disposed. ### Claim 7 (depends on 1) The heads-up display device according to claim 1, wherein an optical path of the projection light between the projection unit and the second reflector, the projection light being reflected by the first reflector, and an optical path of the projection light between the first reflector and the transmissive screen, the projection light being reflected by the second reflector, pass on the same plane. ### Claim 8 (depends on 1) The heads-up display device according to claim 1, wherein the projection unit changes the projection light so as to correct distortion of the virtual image in accordance with operation of the optical axis adjustment unit. ### Claim 9 (depends on 1) The heads-up display device according to claim 1, further comprising a detector detecting point-of-sight position information on a viewer's point-of-sight position, wherein the actuator is driven on the basis of the point-of-sight position information input from the detector. ### Claim 10 (depends on 1) The heads-up display device according to claim 1, further comprising an interface receiving operation information from a viewer, wherein the actuator is driven on the basis of the operation information input from the interface.