Patent ID: 11960096
Assignee: RICOH COMPANY, LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC F  G  H

Claim 17:
18. A head-mounted display device comprising:
an image display located posterior to a plane that is in contact with both eyeballs of the wearer to emit image light;
a light guide plate to guide the image light and emit the image light to an eye of a wearer who wears the head-mounted display device, the light guide plate including a reflection structure and a light guide structure to reflect the image light to outside of the light guide plate toward the eye of the wearer;
a relay optical structure arranged between the image display and the light guide plate to relay the image light from the image display to the light guide plate;
an optical structure located between the relay optical structure and the light guide plate to transform the image light to one of parallel light and telecentric light; and
a control substrate disposed at a side of an optical axis of the image light, which is from the image display to the light guide plate, opposite from the eye,
wherein the optical structure comprises a collimator optical structure,
a first intermediate image is formed after the image light is emitted from the relay optical structure and before the image light enters the collimator optical structure, and
a longitudinal direction of the control substrate is orthogonal to a light emitting surface of the image display.