Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
1998-04-10
2001-06-05
Hong, Stephen S. (Department: 2176)
Data processing: database and file management or data structures
Database design
Data structure types
C708S530000, C708S520000
Reexamination Certificate
active
06243726
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a small electronic apparatus such as a scientific calculator capable of performing input and display of a mathematical expression in textbook format.
2. Description of the Related Art
As prior art, there has been known Japanese Unexamined Patent Publications JP-A 4-252351 (1992), JP-A 5-35685 (1993), JP-A 6-202989 (1994) and so on.
First, JP-A 4-252351 discloses input of an expression in textbook format. Further, JP-A 5-35685 discloses input and edit in textbook format, particularly in respect of a fraction. Further, JP-A 6-202989 discloses input and editing of an expression in simplified textbook format.
According to the prior art, as described in the above-mentioned publications, in a small electronic apparatus, when a mathematical expression is input and displayed in textbook format, the object of the input and display is only one mathematical expression, and a plurality of mathematical expressions inputted cannot be displayed within the same screen at the same time.
Further, when such a mathematical expression as shown in
FIG. 9A
is displayed in textbook format, the outline of the expression can be easily understood at a glance as shown by a screen
50
a
of FIG.
9
B. However, since a display is performed in a horizontal line, when such a mathematical expression as shown in
FIG. 10A
is displayed in textbook format in a small electronic apparatus having a display unit whose screen has a small lateral width, a long mathematical expression cannot be displayed within a screen
51
a
as shown in
FIG. 10B
, and the whole of the expression cannot be seen unless a screen
51
b
is displayed by scrolling the screen
51
a
as shown in FIG.
10
C.
Meanwhile, in one line format, even in the case of a long expression, the whole of the expression can be seen as shown by a screen
51
c
in
FIG. 10D
, but there is a disadvantage in that when the expression is complicated, the outline of the expression is difficult to understand as shown by a screen
50
b
in FIG.
9
C.
Further, in the prior art, it is impossible to input and edit mathematical expressions within the same screen in a state that these two different formats coexist.
In the prior art, a plurality of mathematical expressions can be inputted and displayed within the same screen only in one line format, and on the other hand, only every one expression can be inputted and displayed within the same screen in textbook format.
Hence, the invention makes it possible to input and display a plurality of mathematical expressions within the same screen in textbook format.
Further, in the prior art, in order to display mathematical expressions within the same screen, only one or the other of textbook format and one line format can be selected, and it is impossible to have both formats to coexist.
Hence, in order to utilize both characteristics that the outline of a mathematical expression is easy to understand in textbook format and that the whole of a mathematical expression can be seen at a glance in one line format, the invention causes both formats to coexist, so that a plurality of mathematical expressions are inputted and displayed.
SUMMARY OF THE INVENTION
Objects of the invention are to display a plurality of inputted mathematical expressions within the same screen in textbook format and to display a plurality of inputted mathematical expressions within the same screen in textbook format and one line format.
In a first aspect of the invention, 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 book format.
According to the first aspect of the invention, when mathematical expressions are inputted and displayed in textbook format, a plurality of mathematical expressions can be easily operated within the same screen.
In a second aspect of the invention, 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 a state where textbook format and one line format will coexist.
According to the second aspect of the invention, since a plurality of mathematical expressions can be displayed within the same screen in a state that textbook format and one line format coexist, it is possible to select a display format suitable for an individual mathematical expression.
In a third aspect of the invention, a small electronic apparatus comprises:
inputting means for inputting a plurality of mathematical expressions in textbook book format;
storing means for storing the plurality of inputted mathematical expressions in an order in which the expressions are inputted;
designating means for designating one of the plurality of inputted mathematical expressions;
editing means for editing the designated mathematical expression, the editing means having a first buffer for storing mathematical expressions not to be edited and a second buffer for storing mathematical expressions to be edited; and
displaying means for synthesizing and displaying the mathematical expressions stored in the respective buffers in the order in which the expressions are inputted.
According to the third aspect of the invention, the plurality of mathematical expressions inputted in textbook format can be displayed within the same screen.
In a fourth aspect of the invention, the small electronic apparatus further comprises edit controlling means for, when there is a blank region in the first buffer and a mathematical expression is subsequently designated, judging whether the designated mathematical expression is a mathematical expression to be edited, and for, when the mathematical expression is judged to be edited, forming a predetermined sized blank region in the first buffer as well as storing the designated mathematical expression into the second buffer, and when the mathematical expression is judged not to be edited, storing the designated mathematical expression into the first buffer as well as forming a predetermined sized blank region in the first buffer.
According to the fourth aspect of the invention, by use of the edit controlling means, a plurality of mathematical expressions inputted and edited in textbook format can be easily synthesized to insure display within the same screen.
In a fifth aspect of the invention, the displaying means, when there is no blank region in the first buffer or when no mathematical expression is subsequently designated, synthesizes and displays mathematical expressions stored in the respective buffers in an order in which the expressions are inputted.
According to the fifth aspect of the invention, a plurality of mathematical expressions inputted and edited in textbook format can be surely displayed within the same screen.
In a sixth aspect of the invention, the inputting means is for inputting not only a mathematical expression in textbook format but also a mathematical expression in the one line format to be inputted.
According to the sixth aspect of the invention, a plurality of mathematical expressions inputted in textbook format and one line format can be displayed within the same screen in a state that both formats coexist.
REFERENCES:
patent: 4821228 (1989-04-01), Wickes et al.
patent: 4852057 (1989-07-01), Patton
patent: 4885714 (1989-12-01), Eisenstein et al.
patent: 5067102 (1991-11-01), Eisenstein
patent: 5249147 (1993-09-01), Koumo et al.
patent: 5432721 (1995-07-01), Satoh
patent: 5450095 (1995-09-01), Nagoya
patent: 5526475 (1996-06-01), Razdow
patent: 5528524 (1996-06-01), Oba et al.
patent: 5544262 (1996-08-01), Pagallo
patent: 5890179 (1999-03-01), Naito
patent: 4-252351 (1992-09-01), None
patent: 5-35685 (1993-02-01), None
patent: 6-202989 (1994-07-01), None
Allan Simpson, 1993, Master WordPerfect 5.1&5.2 for Windows, p. 754-765.*
Mathema
Bashore William L.
Hong Stephen S.
Nixon & Vanderhye P.C.
Sharp Kabushiki Kaisha
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