Liquid crystal cells – elements and systems – Particular structure – Holder – support – frame – or housing
Reexamination Certificate
1998-09-30
2001-07-17
Parker, Kenneth (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Holder, support, frame, or housing
C345S001300, C345S903000, C345S905000, C361S689000, C349S073000
Reexamination Certificate
active
06262785
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a portable display device, and more particularly, to a portable display device having an expandable screen.
2. Description of the Related Art
Display devices are generally used to display information output from a computer in the form of letters, drawings, etc. The development of LSI (large scale integration) circuits, high-capacity batteries, LCDs (liquid crystal displays), electroluminescence elements, etc. have enabled ongoing reductions in the size of display devices, in addition to their use in more sophisticated applications. As a result, the display device is now employed in a wide variety of new technologies including palmtop computers and electronic notepads.
However, in many applications, the display device is excessively small, to correspond with the decreased size of the electronic apparatus to which it is employed, making it difficult for the user to discern the displayed information.
SUMMARY OF THE INVENTION
The present invention has been made in an effort to solve the above problems.
It is an object of the present invention to provide a portable display device having a screen which can be expanded, thereby enabling users to clearly view contents displayed thereon while maintaining the portability of the display device.
To achieve the above object, the present invention provides a portable display device including a main body, an extension portion connected to the main body such that the extension portion can be folded over and spread apart from the same, means for inputting data in the main body, and display means, provided in both the main body and the extension portion, for displaying input data and data output from the main body, at least one of the display means able to move toward the other display means to contact the same.
In another aspect, the portable display device includes a keyboard frame, a first display portion hingedly connected to the keyboard frame through a hinge member, a second display portion hingedly connected to the first display portion, input means for inputting data into the keyboard frame, and display means provided in each the first display portion and the second display portion, for displaying information input through the input means and output of the keyboard frame, at the least of the display means able to move toward the other display means to contact the same.
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Schlam et al, “High Resolution displays and Projection Systems”, SPIE vol. 1664, pp. 230-240, Feb. 1992.
Christie Parker & Hale LLP
Parker Kenneth
Samsung Display Devices Co., Ltd
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