Virtual image display device and manufacturing method of virtual image display device

A virtual image display device comprising:

• an image display unit that forms image light;
• a projection system that forms a virtual image by the image light output from the image display unit;
• and
• a light guide unit having a light-incident part that takes the image light that has passed through the projection system inside, a light guide part that guides the image light taken from the light-incident part by total reflection on first and second surfaces, and a light-exiting part that outputs the image light through the light guide part to the outside,
• wherein the light guide unit has a hard coating layer that protects the surface guiding the image light including at least the first and second surfaces, and a reflection part that folds the image light at least in one of the light-incident part and the light-exiting part, and
• the hard coating layer covers at least the surface guiding the image light of an entire member containing at least a light guide main body part that forms at least the light-incident part, the light guide part, and the light-exiting part, and the reflection part for folding light is formed on the hard coating layer.

A manufacturing method of a virtual image display device including an image display unit that forms image light, a projection system that forms a virtual image by the image light output from the image display unit, and a light guide unit having a light-incident part that takes the image light that has passed through the projection, system inside, a light guide part that guides the image light taken from the light-incident part by total reflection on first and second surfaces, a light-exiting part that takes the image light through the light guide part to the outside, a reflection part that folds the image light at least in the light-incident part and the light-exiting part, a coating member that covers the reflection part, and a hard coating layer that protects the surface guiding the image light including at least the first and second surfaces,

• the method comprising:
• fabricating the reflection part for folding light in a light guide main body part that forms at least the light-incident part and the light-exiting part;
• coating the reflection part fabricated in the fabricating with the coating member;
• and
• depositing the hard coating layer that covers an entire member containing the light guide main body part that forms at least the light-incident part, the light guide part, and the light-exiting part and the coating member coating the reflection part for folding light in the coating.

A manufacturing method of a virtual image display device including an image display unit that forms image light, a projection system that forms a virtual image by the image light output from the image display unit, and a light guide unit having a light-incident part that takes the image light that has passed through the projection system inside, a light guide part that guides the image light taken from the light-incident part by total reflection on first and second surfaces, a light-exiting part that outputs the image light through the light guide part to the outside, a hard coating layer that protects the surface guiding the image light including at least the first and second surfaces, and a reflection part that folds the image light at least in one of the light-incident part and the light-exiting part,

• the method comprising:
• depositing the hard coating layer that covers an entire member containing the light guide main body part that forms at least the light-incident part, the light guide part, and the light-exiting part;
• and
• fabricating the reflection part for folding the image light that is formed on the light guide main body part forming at least one of the light-incident part and the light-exiting part of the hard coating layer deposited in the depositing.