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Browse Prior Art Database

Electronic Book with Single-Line Display

IP.com Disclosure Number: IPCOM000106608D
Original Publication Date: 1993-Dec-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 98K

Publishing Venue

IBM

Related People

McBride, D: AUTHOR [+3]

Abstract

Disclosed is a battery-powered, portable system in which stored information is presented in a single line of alphanumeric characters moving across a backlit Liquid Crystal Display (LCD) screen.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Electronic Book with Single-Line Display

      Disclosed is a battery-powered, portable system in which stored
information is presented in a single line of alphanumeric characters
moving across a backlit Liquid Crystal Display (LCD) screen.

      As shown in Fig. 1, electronic book device 10, which is about
the size of a vest pocket calculator, includes an LCD screen 12, on
which a single line of text is displayed, under the control of a
number of associated buttons.  The direction and speed at which text
is moved across screen 12 is determined by the depression of
elongated bar 16.  Depressing the left end 18 of bar 16 moves text
forward, to the left, while depressing the right end 20 of this bar
moves text backward, to the right.  In either case, the speed of text
movement is determined by how hard the bar is depressed.  If neither
end of bar 16 is depressed, screen 12 times out after 30 seconds.
Bar 18 is also used, in combination with other buttons to determine
the direction of text movement through larger increments.  The
depression of button 22 moves the text one paragraph at a time, in
the direction indicated by the simultaneous depression of an end of
bar 16.  Similarly, the depression of button 24 moves the text by
chapter, again in the direction indicated by the simultaneous
depression of an end of bar 16.  The contrast of screen 12 is
increased by depressing button 26 along with left end 18, or
decreased by depressing button 26 along with right end 20.  The
depression of button 30 turns the device on if it is off, or off if
it is on.

      The use of a single-line display 12 minimizes the cost of
device 10 and the power requirements placed on its batteries as the
text of a book is displayed for reading.  The size of the type font
used to generate the characters being displayed is preferably
selectable by the user.  Since a scanning function is provided by the
movement of text, the user is not forced to scan a page by using his
eye muscles.  With backlighting and variable contrast, screen 12 is
easily readable under a wide variety of lighting conditions.

However, to facilitate speedreading, or rapid scanning of a document,
a more conventional display having a number of lines long enough to
read without forcing the movement of the text, may be considered as
an alternate form of the device.

      Fig. 2 is a functional diagram of device 10.  With this system,
all functions are available through a simple interface.  The
functions of elements within keyboard 32 ar...