JPS55160379A - Display unit for residual quantity of tape - Google Patents
Display unit for residual quantity of tapeInfo
- Publication number
- JPS55160379A JPS55160379A JP6763479A JP6763479A JPS55160379A JP S55160379 A JPS55160379 A JP S55160379A JP 6763479 A JP6763479 A JP 6763479A JP 6763479 A JP6763479 A JP 6763479A JP S55160379 A JPS55160379 A JP S55160379A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- residual quantity
- display unit
- light emitting
- emitting diode
- 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
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Abstract
PURPOSE: To prevent malfunction by drawing viewers' attention by providing a cassette tape with the method of detecting the residual quantity of the tape, the method of generating digital information, the method of driving display elements, the method of providing flashing display when the residual quantity reaches a fixed value, etc.
CONSTITUTION: The display unit for the residual quantity of a tape consists of reel turntable 1, light emitting diode 3 for detecting its turning speed, phototransistor 4, pulse amplifier 5, waveform-shaping methods 6, 7 and 8, peak detector 11, DC amplifier 11, display unit 14 equipped with a light emitting diode, etc. Further, DC amplifier 11 is applied with a bias equivalent to the cassette tape. Therefore, even when the output of peak detector 10 decreases gradually as reel turntable 1 turns, a DC voltage adjusted to a value adequate for the time display of the residual quantity of the tape is supplied to AD converter 13 and in display unit 14, the light emitting diode comes on-off according to the residual quantity of the tape.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6763479A JPS55160379A (en) | 1979-05-30 | 1979-05-30 | Display unit for residual quantity of tape |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6763479A JPS55160379A (en) | 1979-05-30 | 1979-05-30 | Display unit for residual quantity of tape |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55160379A true JPS55160379A (en) | 1980-12-13 |
Family
ID=13350607
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6763479A Pending JPS55160379A (en) | 1979-05-30 | 1979-05-30 | Display unit for residual quantity of tape |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55160379A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5834199U (en) * | 1981-08-31 | 1983-03-05 | カシオ計算機株式会社 | electronic musical instruments |
JPS60186587U (en) * | 1984-05-19 | 1985-12-10 | 株式会社ケンウッド | record player |
-
1979
- 1979-05-30 JP JP6763479A patent/JPS55160379A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5834199U (en) * | 1981-08-31 | 1983-03-05 | カシオ計算機株式会社 | electronic musical instruments |
JPH028319Y2 (en) * | 1981-08-31 | 1990-02-27 | ||
JPS60186587U (en) * | 1984-05-19 | 1985-12-10 | 株式会社ケンウッド | record player |
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