# US 10,871,655 B2 · Image display apparatus for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,871,655 B2 - Document ID: US10871655B2 - Status: Granted - Kind: B2 - Application number: 16/068,985 - Filed: 2016-12-12 - Published: 2019-01-10 - Granted: 2020-12-22 - Earliest claimed: 2016-02-12 - Assignees: Maxell, Ltd.; Hitachi Industry & Control Solutions, Ltd. - Applicants: Maxell, Ltd.; Hitachi Industry & Control Solutions, Ltd. - Inventors: Yuki Nagano; Souta Sato; Yuji Fujita; Takumi Nakada; Kazuomi Kaneko - Web page: https://patentgrep.com/patent/US10871655B2 ## CPC - G02B 27/0179: {Display position adjusting means not related to the information to be displayed} - B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01) - G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)} - G02B 27/0149: {characterised by mechanical features (G02B27/0176 takes precedence)} - G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)} - G09G 3/02: by tracing or scanning a light beam on a screen - G09G 5/00: Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) - G09G 5/38: with means for controlling the display position - B60K 35/235: with means for detecting the driver's gaze direction or eye points - B60K 35/265: {Voice} - B60K 35/50: Instruments characterised by their means of attachment to or integration in the vehicle (B60K35/231 takes precedence) - B60K 35/60: Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10) - B60K 35/654: {the user being the driver} - B60K 35/658: {the instruments being ergonomically adjustable to the user} - B60K 35/81: for controlling displays - B60K 2360/23: using reflectors - B60K 2360/334: Projection means - G02B 2027/0118: {comprising devices for improving the contrast of the display / brillance control visibility} - G02B 2027/014: {comprising information/image processing systems} - G02B 2027/0159: {with mechanical means other than scaning means for positioning the whole image} - G02B 2027/0181: {Adaptation to the pilot/driver} - G02B 2027/0183: {Adaptation to parameters characterising the motion of the vehicle} - G02B 2027/0187: {slaved to motion of at least a part of the body of the user, e.g. head, eye} - G09G 2320/06: Adjustment of display parameters - G09G 2320/0626: for control of overall brightness - G09G 2354/00: Aspects of interface with display user - G09G 2360/144: the light being ambient light - G09G 2380/10: Automotive applications - 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 - 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 An image display apparatus 100 for a vehicle is provided with: an image display unit 2 that has a light source and a display element and outputs image light; a mirror 3 that reflects the image light output by the image display unit 2 toward a windshield 7; a mirror drive unit 4 that changes the angle and position of the mirror 3; and a control unit 10 that determines amounts of change in the angle and position of the mirror and controls the mirror drive unit 4. The control unit 10 makes determinations of the amount of change for the angle and position of the mirror in association with each other such that the image is visible even if the position of the driver's eyes 8 changes and the display state of the image with respect to the driver does not change. ## Claims ### Claim 1 An image display apparatus for a vehicle which is mounted on a vehicle, and is configured to project an image light on a windshield and to form a virtual image in front of the windshield to display an image for a driver, the image display apparatus comprising: an image display unit that includes a light source and a display element and emits the image light; a mirror configured to reflect the image light emitted from the image display unit toward the windshield; a mirror drive unit that is controlled to change an angle and a position of the mirror; and a control unit configured to determine change amounts in the angle and the position of the mirror and controls the mirror drive unit, wherein the control unit is configured to determine the change amounts in the angle and the position of the mirror in conjunction with each other to cause the virtual image to be visually recognized and prevent a display state of the image for the driver from changing when a position of the driver's eyes changes, and wherein the mirror drive unit includes a link mechanism having three rotary motors configured to rotate the mirror and two movable arms which couple the rotary motors with each other. ### Claim 2 (depends on 1) The image display apparatus for a vehicle according to claim 1, wherein the control unit is configured to determine the change amounts in the angle and the position of the mirror in conjunction with each other to prevent a reflection position of the image light in the windshield from changing when if the position of the driver's eyes changes. ### Claim 3 (depends on 1) The image display apparatus for a vehicle according to claim 1, wherein the control unit is configured to determine the change amounts in the angle and the position of the mirror in conjunction with each other to prevent an angle of a visual line at which the driver looks down on the virtual image from changing when if the position of the driver's eyes changes. ### Claim 4 (depends on 1) The image display apparatus for a vehicle according to claim 1, wherein the control unit is configured to determine the change amounts in the angle and the position of the mirror in conjunction with each other to prevent a position of the virtual image visually recognized by the driver from changing when if the position of the driver's eyes changes. ### Claim 5 (depends on 1) The image display apparatus for a vehicle according to claim 1, wherein the control unit calculates a centroid position of the driver and estimates the position of the driver's eyes according to detection results of a load sensor and a position sensor provided in a driver's seat of the vehicle, and controls the mirror drive unit to change the angle and position of the mirror according to the estimated position of the driver's eyes by selecting an optimum adjustment amount from a plurality of previously stored optimum adjustment amounts based on the estimated position of the driver's eyes.