JPS5552540A - Reproducing device for recording medium - Google Patents
Reproducing device for recording mediumInfo
- Publication number
- JPS5552540A JPS5552540A JP12334878A JP12334878A JPS5552540A JP S5552540 A JPS5552540 A JP S5552540A JP 12334878 A JP12334878 A JP 12334878A JP 12334878 A JP12334878 A JP 12334878A JP S5552540 A JPS5552540 A JP S5552540A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- reproducing
- chargeable
- recording medium
- region
- 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
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To obtain a semipermanent reproducing device which is high in recording density and in reproduction output by forming a chargeable region of a pattern, corresponding to a recording signal, on a recording medium on a substrate, and then by reproducing the recording signal by using a reproducing electrode after charging that area.
CONSTITUTION: On the surface of base 3 of discoid recording medium 1, for example, grooves where chargeable regions 2 are buried by a laser beam, etc., are so formed that the width or depth will very with the level of a recording signal. On surfaces of grooves and base 3, conductive layer 4 is formed of Al, etc., and a high- resistance chargeable material is buried which becomes chargeable region 2 and is made of vinylidene chloride, etc. Then, region 2 is charged to hundreds volt, for example, and reproducing electrode 5 traces it to obtain a reproduction output of several to tens volt. Electrode 5 is connected to the gate of field effect transistor Q and its output is led out. Here, B represents a direct-current source. Electrode 5 and medium 2 are used without contact, so that the both can be prevented from wearing.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12334878A JPS5552540A (en) | 1978-10-06 | 1978-10-06 | Reproducing device for recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12334878A JPS5552540A (en) | 1978-10-06 | 1978-10-06 | Reproducing device for recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5552540A true JPS5552540A (en) | 1980-04-17 |
Family
ID=14858333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12334878A Pending JPS5552540A (en) | 1978-10-06 | 1978-10-06 | Reproducing device for recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5552540A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0560757A1 (en) * | 1989-06-23 | 1993-09-22 | Univ Leland Stanford Junior | Method and apparatus for storing digital information in the form of stored charges. |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4923012A (en) * | 1972-06-28 | 1974-03-01 | ||
JPS4961326A (en) * | 1972-10-12 | 1974-06-14 |
-
1978
- 1978-10-06 JP JP12334878A patent/JPS5552540A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4923012A (en) * | 1972-06-28 | 1974-03-01 | ||
JPS4961326A (en) * | 1972-10-12 | 1974-06-14 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0560757A1 (en) * | 1989-06-23 | 1993-09-22 | Univ Leland Stanford Junior | Method and apparatus for storing digital information in the form of stored charges. |
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