Method for providing a display unit for an electronic information device

A method for providing a display device for an electronic information device configured to display a virtual image to a user, the electronic information device including an optical element having a nonzero optical power and configured to be positioned in front of an eye of a user, the display device including a light source and a guide element configured to guide optical beams emitted by the light source to the eye of the user to allow viewing of the virtual image, the method comprising:

• providing a value of a parameter of the virtual image;
• and
• determining an optimum value of a display parameter of the display device from at least one optical power at a point of the optical element and from the value of the parameter of the virtual image.

An electronic information device configured to display a virtual image to a user, the virtual image having a parameter of predetermined value, comprising:

• an optical element having a nonzero optical power and configured to be positioned in front of an eye of a user;
• and
• a display device comprising a light source and a guide element configured to guide optical beams emitted by the light source to the eye of the user to allow viewing of the virtual image, the display device having a display parameter whose value depends on at least one optical power at a point of the optical element and on the value of the parameter of the virtual image.

The electronic information device as claimed in 34, wherein the optical element is an optical lens of which one of the surfaces is spherical.