JPS61267855A - Electronic equipment - Google Patents

Abstract

PURPOSE:To improve the operability of an electronic equipment in a dark place by displaying an operation mode that is already designated to the corresponding display digit of the operation mode in a prescribed symbol for the fixed period of time when a mode designation key is operated. CONSTITUTION:A 7-segment fluorescent display device 8 for plural display digits displays the arithmetic data or a prescribed symbol, e.g., '-'. If the input of the mode designation key is given when the arithmetic data is displayed on the device 8, a mode display control means (CPU)4 displays the action mode that is already designated to the corresponding display digit of an operation mode symbol in the prescribed symbol '-'. If no input of the mode designation key is given for the prescribed period of time while the symbol '-' is displayed on the device 8, a timer 9 gives an instruction to the device 8 to display the arithmetic data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to electronic equipment, and in particular, to designating operating modes of small electronic equipment such as desktop calculators, such as printing, decimal point tab, rounding, etc. This invention relates to an electronic device with improved mode display.

SUMMARY OF THE DISCLOSURE The present specification and drawings particularly relate to the modes of operation of small electronic devices, such as desktop calculators, such as printing, decimal point tabs, etc.
When specifying an operation mode such as rounding and displaying the mode, a display means for displaying a plurality of display digits for displaying calculation data or a predetermined symbol, an operation mode symbol expressed in a position corresponding to the plurality of display digits, and an operation mode are specified. and a mode specifying means for specifying the operation mode already specified in the corresponding display digit of the operation mode symbol by inputting the mode specifying means when the calculation data is displayed on the display means. mode display control means for displaying, and no input from the mode specifying means for a predetermined period when a predetermined symbol is displayed on the display means;
This invention discloses a technology for an electronic device that can easily and reliably designate an operation mode and display the mode without requiring any special display by providing a timer means for displaying calculated data on the display means. It is.

Conventional technology In the conventional electronic on-board meter (hereinafter referred to as a calculator), there are the following combinations depending on the type of LSIC chip used.One is a PMOS 1.SIC and a fluorescent display tube display. The other is a combination of a CMOS LSIC and a liquid crystal display.The former has the disadvantage that the power consumption of the PMOS LSIG and fluorescent display tube display is large, but the display can be displayed even in the dark. The latter is advantageous when powered by batteries because both the eMos LSIc and the liquid crystal display consume less power, but it has a major drawback in that the liquid crystal cannot be seen in the dark.

However, in recent years, advances in semiconductor technology have made it possible to take advantage of the advantages of both. For example, the commercialization of CMOS high-voltage LSICs has made it possible to combine CMOS and fluorescent display tubes, resulting in low current consumption. Moreover, it has become possible to provide a total of X machines whose display can be seen even in dark places.

By the way, the operation mode display of such a conventional calculator is 1, for example, PMOS, 1. In the case of a combination of SIC and a fluorescent display tube, this is determined by the mechanical position of the slide switch, so the mode designation does not change even when the power is turned off. This structure is due to the fact that general fluorescent display tubes are not suitable for displaying complex characters or symbols. On the other hand, low-priced trains that combine C140S LSIG and LCD display do not have such slide switches, such as TAB, PRINT,
Each time a mode designation key such as the 5/4 key is pressed, the mode state changes, and the designation state is displayed in an area different from the normal data display area, that is, by adding these mode display symbols to the liquid crystal display. , is showing there. This is because the liquid crystal display is suitable for additionally displaying such mode display symbols.

Conventionally, there was a difference in the 4W construction between a fluorescent display tube and a liquid crystal display, and it was difficult to realize an electronic device that combines the features of both.

[Problems to be Solved by the Invention] The present invention has been made against the above-mentioned background, and its purpose is to provide an inexpensive, low power consumption electronic device that does not lose its display function even in the dark. This is what I am trying to do.

[Means for Solving the Problem] As a means for solving this problem, for example, the electric train equipped with a printing device of the embodiment shown in FIG. The seven-segment fluorescent display 8 of the digits and the operation mode symbol (5/4, PR
INT, etc.) lO, a mode specification key (5/4 key, PRINT key, etc.) for specifying the operation mode, and a mode specification key input when calculation data is displayed on the 7-segment fluorescent display 8. By this, mode display control means (CPU
) 4 and a predetermined symbol "-" on the 7-segment fluorescent display 8.
A timer means 9 is provided for displaying calculated data on a 7-segment fluorescent display 8 when the mode designating key is not input for a predetermined period of time when '' is displayed.

[Operation] In the configuration shown in FIG. 1, the mode display control means:
When @true data of set number data and result data is displayed on the 7-segment fluorescent display 8 for normal calculation,
When the mode designation key is input, the operation mode that has already been specified is displayed in the corresponding display digit of the operation mode symbol 10 shown on the panel with a predetermined symbol -'', and it is possible to indicate which mode is ON and which mode is OFF. The timer means notifies the operator with a fluorescent display.In addition, when the predetermined symbol "-'" is displayed on the 7-segment fluorescent display 8, the timer means indicates that the mode designation key is not input for a predetermined period of time when the predetermined symbol "-'" is displayed on the 7-segment fluorescent display 8. Restore and display the calculated data.

In addition, the mode display control means is a 7 segment fluorescent display 8.
By further inputting the mode designation key when the predetermined symbol is displayed, the display of the predetermined symbol can be turned from ON to OFF or OFF in the currently specified operation mode.
Update from to ON.

EMBODIMENT OF THE INVENTION Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic block diagram of a calculator with a printing device according to an embodiment. In FIG. The keyboard section 2 which outputs key signals is a calculation section composed of a CMOS 1-chip LSIC, and its interior is composed of the following functional blocks.

Reference numeral 3 denotes a read-only memory ROM that stores microinstruction codes for performing sequential control, and in addition to the programs of the embodiments shown in FIGS. 3 to 6, execution programs such as four arithmetic operations are stored. . 4 is RO
A microprocessor unit (MPU) that performs @page processing according to the program of W3, includes an adder, etc. for performing calculations, and outputs a key scanning signal to the keyboard section 1 to determine whether the key is pressed manually.6 is a printer control unit (CPC), which drives the printer 7 based on instructions from the MPU 4. 5 is the keyboard part l
This is a random access memory (RAM) that stores numeric data etc. input from the memory, specifically the display register XR for calculation and display, other general-purpose registers YR,
F, PF,
RF and a decimal point position designation register TFhi are provided. Here, to explain the main functions of registers XR1YR and ZR, register XR is a display register and consists of a total of 11 digits, including several digits, an overflow digit, a decimal point position digit, and a sign digit, and one digit is 4 bits. It is configured. Registers YR and ZR are similarly composed of 11 digits, and in particular, register ZR is a constant register and stores constants for constant calculation. 8 is the display section, which is composed of a normal 7-segment fluorescent display tube, and the modes PRINT, 5/4, 0, 2, and 10 are displayed on the train exterior panel at positions corresponding to the 1st to 5th digits. Characters 10 representing the condition are printed or engraved. Further, 9 is a timer means for counting a predetermined time.

FIG. 2 is a diagram showing the correspondence between the code in the display register XR and the display mode of the fluorescent display tube.
The numerical codes in the first to eighth digits of R are segmented and driven by a character generator (not shown) in MPU A, and are displayed numerically. Furthermore, knee 1”
A is used as a predetermined symbol for mode display,
Codes B-H are not used, and code F is displayed blank.

Figure 3 and! Figure $4 is a flowchart showing mode designation and display processing in the embodiment. First, to explain the flags used here, MF is a mode status flag, and when the flag MF is set, a predetermined symbol "°-" is displayed on the 7-segment fluorescent display 8. Display operating mode.

Also, when it is reset, normal arithmetic numbers and results are displayed. PF is a print flag, and the flag PF
When is set, it indicates that it is in print mode,
Also, when it is reset, it indicates that it is not in print mode. RF is a rounding flag, and when the flag RF is set, it indicates that it is in rounding mode, and when it is reset, it indicates that it is in rounding mode. Indicates mode. TR is a decimal point position specification register, and when the contents of the register R is TR = 0, it is in floating mode.
↑When R= 1, TAB = 02 When TR= 2, T
When AB = 2 and TR = 3, it indicates TAB = + (atto mode).

Now, when the PRINT key of the keyboard section 1 is pressed, input is made to the print key processing shown in FIG.

In Step Sl-Step S5, if the mode state flag MF=O1, that is, the mode state is not present, the flag ll is
! Set F [MF←1] and invert the print flag PF when in the mode state. This will enter the mode display state by first pressing any mode specification key,
This is a process that allows the mode to be specified upon subsequent presses. In step S6, the contents of the display register XR are transferred to the register YR to save the calculation data,
In step S7, a mode status display process shown in FIG. 4, which will be described later, is executed. However, if it is already in the mode state (determination in step Sl is N), step S6 is not performed. This is to prevent the contents of register YR from being destroyed. This rotation is the same below. Step 518 waits for the next key personnel.

Also, when the 5/4 key on the keyboard part l is pressed, the 5/4 key is pressed.
/4 key processing input. Step 38 ~ Step S
In step 12, if it is not in the mode state, flag IIIF is set, and if it is in the mode state, the rounding flag RF is inverted and the process similarly proceeds to step S6 or step S7.

Also, when the TAB key on keyboard section 1 is pressed, T
Input to AB key processing and step 313 to step S
In 17, when not in the mode state, set the flag liver,
When in the mode state, the contents of the decimal point position accumulation register TR are counted up, and when the contents exceed 3, it is set to O.
The TAB state is cycled as F (floating) → 0 → 2 → +, and the process similarly proceeds to step S6 or step S7.

FIG. 4 is a flowchart showing the mode status display process. In step 521, a blank code F is set in all digits of the display register XR, and in step S22, the state of the print flag PF is determined. Set code A. In step S24, the state of the rounding flag RF is determined, and if the flag RF is set, code A is set in the second digit x2 of the display register XR in step S25. In steps 326 to 531, when the decimal point position accumulation register TR=3, 4tXa is set, TR=2 (7) lf? HaX4d, T
When R=1 (7), code A is set in x3, and in step S32, timer interrupt is activated for about 10 seconds in timer 9,
Return to step S+8, waiting for key human power.

Thereafter, if there is no key input for about 10 seconds while the mode status is being displayed, the timer 9 times out and the process proceeds to the timer interrupt shown in FIG. The stored display data is returned to the display register XR, the flag MF is reset in step S52, and the process proceeds to wait for key manual power (step S1g) in FIG.

Further, when a key other than the mode designation key is pressed while the key is waiting for human power, the process proceeds to the key other than the mode designation key shown in FIG. Since this is a forced return from the mode display, the flag MF is reset in step S52, the display data transferred to the register YR is returned to the display register XR in step S54, the timer is deactivated in step S54, and the step In S55, normal processing corresponding to each key (number key, function key, etc.) is performed. Further, if the flag MF is O in step 551, the process advances to step S55.

FIGS. 7(a) to 7(f) are diagrams showing actual display examples in response to each key operation. Figure (a) shows the normal calculation state, when several keys are pressed in the order of 1 to 5, the display data is displayed as ``123.45'' as the number is set, and the decimal point is not pressed manually. is displayed, indicating that it is in atto mode, but if you press the 574 key to confirm as shown in the figure (b), the mode status at that time will be displayed for about 10 seconds, and the print will be executed as shown in the figure. The status, rounding mode, and atto mode can be determined from the display position of "-".

Furthermore, if you press the 574 key again in (e) of the same figure, the letter 5/4 E 11'° will disappear, indicating that the truncation mode has been set.0 Next, in (d) and (e) of the same figure, Each TA
When the B key is pressed, the decimal point position designation changes from floating mode to O mote, and the status can be seen. Furthermore, if there is no key input for about 10 seconds in FIG. 5(f), a timer interrupt is activated and the previous display data "123, 45" is displayed.

"Effect" As described above, according to the present invention, for example, 0 MO5 LS
Even in a low power consumption electric train using an IC, it is possible to designate a mode and display a display that can be seen in a dark place, and since there is no need to create a special character pattern on a fluorescent display tube, the device can be constructed at a low cost.

[Brief explanation of drawings]

Fig. 1 is a schematic block diagram of a train with a printing device according to the embodiment, Fig. 2 is a diagram showing the correspondence between the code in the display register xR and the display mode of the fluorescent display tube, and Fig. 3 is the mode specification of the embodiment. FIG. 4 is a flowchart showing mode display processing of the embodiment; FIG. 5 is a flowchart showing key processing other than the mode designation key; FIG. 6 is a brooch yard showing timer interrupt processing. FIGS. 7(a) to 7(f) are diagrams showing actual display examples in response to each key operation. In the figure, l...keyboard section, 2...calculation section, 3...
・Read-only memory (ROM), 4... Microprocessor unit (MPU), 5... Random access memory (RAM), 6... Printer control section (PC), 7... Printer,
8...Display section.

Claims (2)

[Claims] (1) A display means for displaying a plurality of display digits for displaying calculation data or a predetermined symbol, an operation mode symbol expressed in positional correspondence to the plurality of display digits, a mode designation means for specifying an operation mode, and the display means By inputting the mode specifying means when the calculated data is displayed,
mode display control means for displaying an operation mode already designated in a display digit corresponding to the operation mode symbol with the predetermined symbol; and when the predetermined symbol is displayed on the display means, there is no input from the mode designation means for a predetermined period of time. An electronic device comprising: timer means for displaying calculated data on the display means. (2) A patent claim characterized in that the mode display control means updates the display of the predetermined symbol in the currently designated operation mode in response to an input from the mode specifying means when the predetermined symbol is displayed on the display means. Electronic equipment as described in item 1 of the scope.