JPS55118174A - Electronic desk computer - Google Patents
Electronic desk computerInfo
- Publication number
- JPS55118174A JPS55118174A JP2545079A JP2545079A JPS55118174A JP S55118174 A JPS55118174 A JP S55118174A JP 2545079 A JP2545079 A JP 2545079A JP 2545079 A JP2545079 A JP 2545079A JP S55118174 A JPS55118174 A JP S55118174A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- arithmetic result
- display
- disappearance
- given
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Calculators And Similar Devices (AREA)
Abstract
PURPOSE: To give protection to disappearance of the arithmetic result for the electronic desk computer where the power switch is turned off automatically in case no operation is given for a fixed time or more, by giving the previous notice before turn-off of the power supply.
CONSTITUTION: With supply of the numerical value or the like to key input circuit 1, the operation is carried out through arithmetic control circuit 3. And the arithmetic result is memorized in display data memory circuit 2. At this moment, the signal is delivered to display signal generator circuit 4 from circuit 3 and then displayed to display circuit 8 through AND gate 7. In case the key operation is not given within circuit 3 for fixed time T1 or more, the NAND gate and delay circuit 9 deliver "1" and "0" with the fixed cycle. And circuit 8 displays the arithmetic result intermittently. After time T2 (T2>T1), circuit 3 opens switch 6 to cut off power supply 10. And the key operation is urged by the display flashing, thus avoiding the disappearance of the necessary arithmetic result.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2545079A JPS55118174A (en) | 1979-03-05 | 1979-03-05 | Electronic desk computer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2545079A JPS55118174A (en) | 1979-03-05 | 1979-03-05 | Electronic desk computer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55118174A true JPS55118174A (en) | 1980-09-10 |
Family
ID=12166345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2545079A Pending JPS55118174A (en) | 1979-03-05 | 1979-03-05 | Electronic desk computer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55118174A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5339839A (en) * | 1976-09-24 | 1978-04-12 | Sharp Corp | Key control type electronic device |
-
1979
- 1979-03-05 JP JP2545079A patent/JPS55118174A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5339839A (en) * | 1976-09-24 | 1978-04-12 | Sharp Corp | Key control type electronic device |
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