JPS5616947A - Video disc - Google Patents
Video discInfo
- Publication number
- JPS5616947A JPS5616947A JP9031179A JP9031179A JPS5616947A JP S5616947 A JPS5616947 A JP S5616947A JP 9031179 A JP9031179 A JP 9031179A JP 9031179 A JP9031179 A JP 9031179A JP S5616947 A JPS5616947 A JP S5616947A
- Authority
- JP
- Japan
- Prior art keywords
- stylus
- groove
- disc
- video
- signal
- 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 Record Carriers And Manufacture Thereof (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
PURPOSE: To enable accurate reproduction of tracking signal without being affected with dust, by providing the stylus proove for control signal in parallel with the recording track of video signal.
CONSTITUTION: On the surface of the video disc 1, a number of video tracks 4 are formed in spiral or concentrically. Near this track 4, the same stylus groove 5 as conventional mechanical groove of LP record disc is provided. The contact stylus 7 traces the groove 5 for control and the output is processed with the pickup and amplifier for control signal. Since the stylus groove 5 is used only for the rotary control of discs, the contact stylus 5 is almost not affected with the dirt of disc surface and attachment of dust, accurate tracking of laser light system is made and low cost video disc can be obtained without using expensive automatic control unit.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9031179A JPS5616947A (en) | 1979-07-18 | 1979-07-18 | Video disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9031179A JPS5616947A (en) | 1979-07-18 | 1979-07-18 | Video disc |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5616947A true JPS5616947A (en) | 1981-02-18 |
Family
ID=13994978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9031179A Pending JPS5616947A (en) | 1979-07-18 | 1979-07-18 | Video disc |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5616947A (en) |
-
1979
- 1979-07-18 JP JP9031179A patent/JPS5616947A/en active Pending
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