Portable terminal device having a display unit utilizing a holographic screen

A portable terminal device comprising:

• a main housing;
• an auxiliary housing extending from the main housing in a longitudinal direction of the main housing;
• a hinge means protruding upward between the main housing and the auxiliary housing;
• and
• a folder assembled with the hinge means in such a manner that the folder can be rotated about the hinge means to one of expose and cover the main housing, the folder including an LCD, the folder being disposed nearer to the auxiliary housing when exposed and nearer to the main housing when covered according to rotation of the folder, wherein the auxiliary housing comprises:
• a holographic screen optically displaying information by means of image-light which is projected to the holographic screen;
• and
• an optical system spaced apart from the holographic screen and providing the holographic screen with the image-light.

A portable terminal device comprising:

• a main housing;
• an auxiliary housing extending from the main housing in a longitudinal direction of the main housing;
• a hinge means protruding upward between the main housing and the auxiliary housing;
• a holographic screen assembled with the hinge means in such a manner that the holographic screen can be rotated about the hinge means to one of expose and cover the main housing, the holographic screen being disposed nearer to the auxiliary housing when exposed and nearer to the main housing when covered according to rotation of the folder, the holographic screen optically displaying information by means of image-light which is projected to the holographic screen;
• and
• an optical system spaced apart from the holographic screen, the optical system providing the holographic screen with the image-light when the holographic screen is opened from the main housing while being inclined at a predetermined angle.

A portable terminal device comprising:

• a main housing;
• an auxiliary housing extending from the main housing in a longitudinal direction of the main housing;
• a hinge means protruding upward between the main housing and the auxiliary housing;
• a folder assembled with the hinge means such that the folder can be rotated about the hinge means to expose or cover the main housing, the folder being disposed nearer to the auxiliary housing when exposed and nearer to the main housing when covered according to rotation of the folder;
• and
• a display unit comprising a first display sub-unit for displaying information when the folder is closed onto the main housing, and second display sub-unit for displaying information when the folder is opened from the main housing,
• wherein the first display sub-unit comprises:
• a first holographic screen optically displaying information by means of first image-light which is projected to the first holographic screen, the first holographic screen being disposed on the auxiliary housing;
• and
• a first optical system spaced apart from the first holographic screen and providing the first holographic screen with the first image-light, and
• wherein the second display sub-unit comprises:
• a second holographic screen optically displaying information by means of second image-light which is projected to the second holographic screen, the second holographic screen being disposed on the folder;
• and
• a second optical system spaced apart from the second holographic screen and providing the second holographic screen with the second image-light.

A portable terminal device comprising:

• a main housing;
• an auxiliary housing rotatably assembled with one end of the main housing through a hinge means;
• a holographic screen rotatably assembled between the main housing and auxiliary housing by means of the hinge means, the holographic screen being disposed nearer to one of the auxiliary housing and the main housing according to rotation of the folder, the holographic screen optically displaying information by means of image-light which is projected to the holographic screen;
• and
• an optical system mounted to the auxiliary housing and providing the holographic screen with the image-light.

A portable terminal device comprising:

• a main housing;
• an auxiliary housing rotatably assembled with one end of the main housing through a hinge means;
• a holographic screen rotatably assembled between the main housing and auxiliary housing by means of the hinge means, the holographic screen being disposed nearer one of to the auxiliary housing and the main housing according to rotation of the folder, the holographic screen optically displaying information by means of image-light which is projected to the holographic screen;
• and
• an optical system mounted to the main housing and providing the holographic screen with the image-light.

A portable terminal device comprising:

• a housing at one section of which a keypad having a plurality of keys arranged on the keypad is disposed;
• a holographic screen assembled with the housing such that the holographic screen can be rotated about a rotation axis which extends transversely through both sides of the housing, the holographic screen optically displaying information by means of image-light which is projected to the holographic screen;
• and
• an optical system disposed at another section of the housing, the optical system providing the holographic screen with the image-light when the holographic screen is opened from the housing while being inclined at a predetermined angle.

A portable terminal device comprising:

• a main housing;
• a holographic screen rotatably assembled with the main housing by means of a hinge means, the holographic screen optically displaying information by means of image-light which is projected to the holographic screen;
• and
• an optical system mounted to the main housing and providing the holographic screen with the image-light.