Virtual image display device

A virtual image display device, comprising:

• an image display device that forms image light;
• a projective optical system that allows the image light emitted from the image display device to be incident;
• and
• a light guiding member, comprising:
• a light guiding portion;
• a light incidence portion that allows the image light to be incident to the light guiding portion;
• and
• a light emission portion that emits the image light guided by the light guiding portion to the outside, and that makes the image light visible through the light emission portion,
• the light guiding portion having a first reflective surface and a second reflective surface that are disposed in parallel with each other and allow light to be guided through a substantially total reflection,
• the light incidence portion having a third reflective surface that makes a predetermined angle with respect to the first reflective surface,
• the light emission portion having a fourth reflective surface that makes a predetermined angle with respect to the first reflective surface, and
• the number of times of reflection of a first image light beam, emitted from a first partial region, which forms a first projection image in the image display device, in the light guiding portion, and the number of times of reflection of a second image light beam, emitted from a second partial region, which forms a second projection image in the image display device, different from the first partial region in regard to a confinement direction in which a return of an optical path due to reflection occurs at the time of light-guiding, in the light guiding portion, being different from each other.

A virtual image display device, comprising:

• an image display device that emits a plurality of image light beams;
• a projective optical system that allows the image light emitted from the image display device to be incident;
• and
• a light guiding member, comprising:
• a light guiding portion;
• and
• a light incidence portion that allows the image light to be incident to the light guiding portion, and a light emission portion that emits the image light guided by the light guiding portion to the outside, and that makes the image light visible through the light emission portion,
• the light guiding portion having a first reflective surface and a second reflective surface that are disposed in parallel with each other and allow light to be guided through a substantially total reflection,
• the light incidence portion having a third reflective surface that defines an opening width and makes a predetermined angle with respect to the first reflective surface,
• the light emission portion having a fourth reflective surface that makes a predetermined angle with respect to the first reflective surface,
• each of the plurality of light beams being propagated in three different modes and substantially totally reflected at a different reflection angle such that a first reflection angle of the plurality of light beams is greater than a second reflection angle of the plurality of light beams, and the second reflection angle being greater than a third reflection angle of the plurality of light beams, and
• the light guiding member being configured to increase a width of an angle of emission of the image light emitted from the light emission portion.