JPH0556552B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention displays a cursor and two or more types of adjacent scale scales on a screen such as a liquid crystal display device, and performs calculations by moving these on the screen. Regarding electronic slide rules.

<Prior art> Slide rules have been widely used in technical calculations because they can perform continuous calculations and are easy to handle.
However, multiplication and division, trigonometric functions, which were based on slide rules,
Nowadays, calculations such as exponential functions are commonly performed using desktop electronic calculators equipped with these functional calculation functions.

<Problems to be Solved by the Invention> However, even with such functional desktop electronic calculators, the number of functions that can be calculated is limited to a few types, and complex functions cannot be calculated in memory by calculating each term of the function individually. There is no choice but to add, subtract, or create an arithmetic program in advance and then enter the numbers in sequence according to the program, which is time-consuming and requires a lot of effort. The disadvantage is that it is difficult to do. On the other hand, as is well known, conventional slide rules have a structure in which the slide rule and cursor slide on a fixed rule, so errors are likely to occur due to changes in the material over time or changes in the environment. This has the disadvantage that it becomes long and inconvenient. Furthermore, a slide rule has the disadvantage that it is difficult to provide scale scales for as many different functions as a functional desktop electronic calculator.

Therefore, the purpose of the present invention is to make use of the visually analogous properties of the conventional slide rule, to easily perform complex function calculations by selecting the scale scale accordingly, to avoid errors due to changes over time, and to achieve high precision even with short lengths. An object of the present invention is to provide an electronic slide rule that can read the following information.

<Means for Solving the Problems> In order to achieve the above object, the electronic slide rule of the present invention includes a scale information memory that stores at least two types of scale information, and a scale information memory that stores at least two types of scale information, and a scale information memory that stores at least two types of scale information. a display unit that displays at least two types of scales adjacent to each other in parallel based on the display unit and a cursor; and a scale moving unit that moves at least one of the scales on the screen of the display unit under the control of a main control unit. and a cursor moving means for moving the cursor on the screen under the control of a main control section.

<Operation> The cursor displayed on the screen of the display unit is moved to the position of the scale scale corresponding to the variable value on the screen using the cursor moving means, and the cursor is displayed adjacent to and parallel to the scale scale. Another one that was done
The function value can be found by reading the two scale marks. Conversely, variable values for function values can also be found in the same way. Further, the cursor is moved to the position of the scale scale corresponding to the operand on the screen using the cursor moving means, and then another scale scale, that is, the slide scale is moved by the scale moving means, and this slide scale is moved. After aligning the scale corresponding to the number of calculations with the above cursor, use the scale moving means to move the cursor again to the scale position where the calculation result of the above sliding scale can be obtained, and read the adjacent scale scale to find the calculation result. .

<Examples> Hereinafter, the present invention will be explained in detail with reference to illustrated examples.

Figure 1 is a schematic plan view showing the entire electronic slide rule, in which 1 is a rectangular liquid crystal display (hereinafter referred to as LCD) as a display section, and 2 is a horizontal display on the upper half of this LCD 1. Scale graduation 2 is another one displayed adjacent to and parallel to this scale graduation 2 in the lower half.
4 is a cursor displayed vertically across both scale scales 2 and 3, 5 and 6 are mode keys for selecting the upper and lower scale scales 2 and 3, respectively, 7 and 8 are the above, respectively. A scale movement key for moving the upper and lower scale scales 2 and 3 left and right, 9 a cursor movement key for moving the cursor 4 left and right, and 10 a screen enlargement key for enlarging and displaying the scale near the cursor 4. , 11 are numerical display keys for numerically displaying both scale scales at the position of the cursor 4.

The mode keys 5 and 6 are such that when each key is pressed, a scale mark marked on the key is partially displayed on the screen of the LCD 1. The scale movement keys 7 and 8 are normally operated individually, and both scale scales also move independently of each other. For example, the mode key 5 is set to D(y), the mode key 6 is
are selected as S(x), and in the case of a combination to obtain a function such as y=sin By simply operating one of the scale movement keys, both scale scales 2 and 3 can be moved synchronously. The cursor 4 is moved by the cursor movement key 9 and used for adjusting the scale and reading calculation results, and when the screen enlargement key 10 is pressed at this time, a predetermined section near the cursor is subdivided as shown in Fig. 2. When the numerical display key 11 is further pressed, both scale scales at the position of the cursor 4 change to 1 as shown in FIG.
Numerical values are displayed within squares marked 4 and 15, respectively. Furthermore, it is also possible to move the cursor 4 and both enlarged scale scales 12 and 13 in this enlarged display state.

FIG. 4 shows a functional block diagram of the electronic slide rule of FIG. 1, each block actually comprising a conventional microprocessor system. The main control unit 20 has keys 5 to 1 shown in FIG.
Each block is operated and controlled in response to each key operation on a keyboard unit 21 consisting of 1. The scale information memory 22 is composed of a ROM, etc., and is provided with standard data (on a slide rule) for grading each scale in the scale information areas 221, 222, 223, . . . corresponding to each scale of the mode keys 5, 6 in FIG. The standard data corresponding to the selection of the mode keys 5 and 6 is supplied to the scale calculation unit 23. Based on the reference data, the scale calculation unit 23 calculates
Sampling is performed in conversion to the dot size of the LCD unit 32 (see Fig. 1), and a value corresponding to the scale interval to be displayed on the LCD is output, and the numerical data to be attached to the scale is sent to the numerical code generator 24. supply to. The above scale calculation unit 2
3 and the data output from the numerical code generator 24 are encoded by the coding unit 25 into one scale data in which a code representing the scale interval and a numerical code corresponding to the scale are combined, and then roughly sampled. scale data (first
2 and 3) and finely sampled enlarged scale data (see FIG. 2 and 13) are output to the memory unit 26. In this way, data for the entire length of the slide rule is formed.

The memory unit 26 includes memories 261, 262, . . . for storing at least two types of scale scale data to be simultaneously displayed on the LCD 32, and memories 261', 262', . . . for storing enlarged scale scale data paired with these. It also has a cursor position register (not shown) that stores the position of the cursor 4, and when the combination of scale scales selected with the mode keys 5 and 6 is a function calculation, both memories (for example, 261 and 262) are accessed in association with each other by the main control unit 20 via the cursor position register. By turning on or off the screen enlargement key 10, either enlarged scale scale data or scale scale data is read out from the memory unit 26, the scale data is stored in the scale pattern generation unit 27, and the numerical data is stored in a predetermined scale unit. Number pattern generation unit 2
8, respectively. Then, the scale pattern generation unit 27 develops the scale data into a scale display-shaped dot pattern having a scale interval corresponding to the scale, and the numeric pattern generation unit 28 develops the numeric data into a numeric-shaped dot pattern and develops it. The dot pattern data thus obtained is transferred to and stored in a video memory 30 (hereinafter abbreviated as V memory) via an LCD control unit 31, and is also displayed on an LCD unit 32 using a known liquid crystal display technique.

The cursor control unit 29 controls the LCD control unit 31 under the control of the main control unit 20 so that the cursor 4 on the screen is moved by each scale unit each time the cursor movement key 9 is operated, and also controls the cursor 4 reaches the left and right ends of the screen and is further moved, new data is transferred from the memory unit 26 to the V memory 30 to scroll the display data, and the contents of the cursor position register in the memory unit 26 are updated. On the other hand, when the scale movement keys 7 and 8 are operated, the main control section 20 similarly transfers new scale data corresponding to the scale to be displayed from the memory unit 26 to the V memory 30, and scrolls the scale on the screen. and display it.

The operation of the electronic slide rule having the above configuration will be described below with reference to FIG.

Mode keys 5 and 6 are operated to perform calculations in the same way as operating a general slide rule. For example, when performing multiplication, press key D and key CI to select D scale and CI scale. This operation executes S100. Then, the corresponding area of the scale information memory 22 is selected and the scale information is supplied to the calculation unit 23. This calculation unit 23 calculates normal scale values, enlarged scale values, and scale values based on the supplied scale information,
The result is outputted to the encoding unit 25 as scale data converted into the dot size of the LCD 32. These data are encoded in the encoding unit 25 and stored in the memory unit 26. Subsequently, the scale data corresponding to the display size of the LCD 32 from the left end of the slide rule is read out from the memory unit 26, and is stored in the pattern generation unit 2.
7 and 28 into a scale-shaped and number-shaped dot pattern, and the LCD control unit 31
The signal is supplied to the V memory 30 via the . Furthermore, initialization is performed to set the cursor 4 to the leftmost scale position, and the cursor position register corresponding to the selected scale scale is initialized to position data corresponding to the position of the cursor in the entire scale. This cursor position register is stored in memory unit 26.
will be used when accessing again. The above step S100 is executed every time each scale selection key is operated, and the display is thereby displayed on the screen as shown in FIG.

When the cursor 4 is moved with the cursor movement key 9 in order to align it with the first calculation value (for example, the indication of the multiplicand during multiplication: scale 2),
S300 is executed, the cursor counter is up/down in a loop of No, the cursor position register is updated, and the cursor 4 is sequentially moved and displayed on the screen. If the scale of the first calculated value is not displayed on the screen, in a loop of Yes, the memory unit 26 creates a new scale data memory area corresponding to the amount of movement of all scale scales displayed so far. The selected area data is transferred to the V memory 30 and the cursor position register is updated. As a result, the scale scales 2 and 3 are scrolled and the cursor 4 is moved over the entire scale scale and is aligned with the target scale position.

Next, in order to align the second calculated value (for example, the multiplier) on the other scale 3, the scale movement key 8 is pressed.
operate. Then, S200 is executed, and in order to move only the scale 3, new data corresponding to the amount of movement is transferred from the memory unit 26 to the V memory 30, and the cursor position register of the scale scale is updated. .

When the scale alignment of both scales is completed in this way, the cursor 4 is moved by the cursor movement key 9 to the scale position where the calculation result is obtained. After moving the cursor to the vicinity of the scale position, when the screen enlargement key 10 is pressed, S500 is executed, the enlarged scale memory area corresponding to the cursor position register is selected, and the screen is displayed using a known window display technology such as a CRT. , the scale data is transferred to the V memory 30. As a result, the scale around the cursor position is enlarged and displayed as shown in FIG. Then, the operator moves the cursor again and places the cursor on the fine scale scale position from which the result is obtained. At this time, if you press the numerical display key 11,
S400 is executed, the enlarged scale data memory corresponding to the data in the cursor position register is accessed, the numeric code data is read out, developed into a numeric pattern, and written to the V memory 30, thereby displaying the third mark on the screen. The numerical value is displayed as shown in the figure.

In the above embodiment, there are six types of scale scales that can be selected using the mode keys 2 and 3, respectively, and when both scale scales to be selected are for function calculation, one scale movement key 7 or 8 is controlled by the main control unit 20. Both scales can be moved synchronously by simply operating the cursor movement key 9, and both scale scales can be scrolled and displayed simply by operating the cursor movement key 9, making it possible to perform various calculations and making calculation operations easier. In addition, since it is equipped with a screen enlargement key 10 and a numerical display key 11, accurate scale adjustment allows calculations with extremely high precision, which were impossible with conventional slide rules, to be performed.

In the above embodiment, the reference data stored in the scale information memory as shown in FIG.
After storing it in the scale pattern generating unit 27 etc.
Although the dot pattern is developed on the LCD 32, predetermined scale dot data or coded data may be stored in a ROM or the like. It goes without saying that it is also possible to display three or more scale scales at once, and to calculate special functions by replacing or adding ROMs.

<Effects of the Invention> As is clear from the above description, the electronic slide rule of the present invention includes a scale information memory that stores at least two types of scale information, and a scale information memory that stores at least two types of scale information, and a scale information memory that stores at least two types of scale information. a display section that displays two types of scales adjacent to each other in parallel and a cursor; a scale moving means that moves at least one of the scales on the screen of the display section under the control of a main control section; It is equipped with a cursor moving means that moves the cursor on the screen under the control of the main control unit, so there is no error caused by changes over time like with conventional slide rules, and even short lengths can be read with high precision, and calculations It is extremely effective as a new calculation method, as it allows the user to grasp results in a more visual and analog way than with a functional tabletop electronic calculator, and allows complex function calculations to be easily obtained in a shorter time.

[Brief explanation of drawings]

FIG. 1 is a schematic plan view of the electronic slide rule of the present invention;
Figures 2 and 3 are diagrams showing enlarged scale scales;
FIG. 4 is a functional block diagram of the electronic slide rule shown in FIG. 1, and FIG. 5 is a flowchart showing the operation of the electronic slide rule. 1... Liquid crystal display (LCD), 2, 3... Scale scale, 4... Cursor, 5, 6... Mode key,
7, 8... Scale movement key, 9... Cursor movement key, 10... Screen enlargement key, 11... Numerical display key, 12, 13... Enlarged scale scale, 14, 15...
... Numeric value, 20 ... Main control unit, 21 ... Keyboard unit, 22 ... Scale information memory, 32 ...
LCD unit.

Claims (1)

[Claims] 1: a scale information memory that stores at least two types of scale information; and a display unit that displays at least two types of scales adjacent to each other in parallel and a cursor under the control of a main control unit based on the scale information. , a scale moving means for moving at least one of the scales on the screen of the display section under the control of the main control section, and a cursor moving means for moving the cursor on the screen under the control of the main control section. An electronic slide rule characterized by: