Patent ID: 11892628
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 9:
10. A video display method executed in a video display system in a moving body that allows a user of the moving body to view, as a virtual image, an image projected on a screen, the video display method comprising:
generating an image signal indicating the image to be projected onto the screen;
emitting laser light in accordance with the image signal generated;
projecting the image onto the screen by biaxially scanning the laser light onto the screen, the image being viewed by the user of the moving body as the virtual image;
obtaining sensing information indicating a brightness of an external environment of the moving body measured using a sensor or a temperature of a light source that emits the laser light measured using a sensor;
when the sensing information indicates a first brightness or a first temperature outside a given temperature range, reducing an amplitude of the biaxial scanning in at least one axial direction of the biaxial scanning to a smaller value than when the sensing information indicates a second brightness darker than the first brightness or a second temperature within the given temperature range; and
when the sensing information indicates the first brightness or the first temperature outside the given temperature range, enlarging an image of a same type displayed at a same position in the virtual image, regardless of the first brightness or the first temperature indicated by the sensing information, in the axial direction, in which the amplitude of the biaxial scanning is to be reduced by the scanner, to a greater size than when the sensing information indicates the second brightness or the second temperature within the given temperature range.