Patent ID: 6243726
Filing Date: 2001-06-05
Classification: G06F

Abstract:
A small electronic apparatus for inputting and displaying mathematical expressions in textbook format and one line format is characterized in that a plurality of mathematical expressions can be inputted and displayed within one and the same screen in textbook format, the apparatus comprising:a keyboard for inputting the plurality of mathematical expressions in textbook format and one line format;a first memory for storing the plurality of inputted mathematical expressions in an order in which the expressions are inputted;a first buffer for storing mathematical expressions that are not edited;a second buffer for storing mathematical expressions that are edited;a processor for editing the mathematical expressions stored in the second buffer, forming a blank region of predetermined size in the first buffer when a mathematical expression is being edited, and forming synthesized images of the edited mathematical expressions and the mathematical expressions stored in the first buffer when there is no blank region of predetermined size in the first buffer;a second memory in which is formed the synthesized images of the mathematical expressions stored in the first buffer and the edited mathematical expressions stored in the second buffer in the order in which the first buffer and edited second buffer expressions are inputted in said second memory; andwherein the screen displays mathematical expressions contained in the synthesized images in textbook format.