Head-mounted display devices, glasses-type display devices, and display devices having these forms

A head-mounted display device, comprising:

• a first display device that provides images to a user's left eye;
• a second display device that provides images to the user's right eye;
• a display device housing that accommodates the first display device and the second display device;
• and
• a housing cover that covers a face of the display device housing and includes a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device,
• wherein each of the first display device and the second display device includes a display panel that comprises an emission material layer, an optical layer that includes lenses disposed on the emission material layer, and a circuit board disposed at one end of the display panel and that includes a driver circuit that drives the display panel, and
• wherein the circuit board of the first display device and the circuit board of the second display device are symmetrically arranged with respect to a center of the housing cover located between the first eyepiece and the second eyepiece.

A glasses-type display device, comprising:

• a first display device that provides images to a user's left eye;
• a second display device that provides images to the user's right eye;
• a display device housing that accommodates the first display device and the second display device;
• and
• a housing cover that covers a face of the display device housing and includes a first eyepiece aligned with the first display device and a second eyepiece aligned with the second display device,
• wherein each of the first display device and the second display device includes a display panel that includes an emission material layer, an optical layer that includes lenses disposed on the emission material layer;
• and a circuit board disposed at one end of the display panel and that includes a driver circuit that drives the display panel, and
• wherein the circuit board of the first display device and the circuit board of the second display device are symmetrically arranged with respect to a center of the housing cover located between the first eyepiece and the second eyepiece.