JPS54146920A - Interlace scanning method and its unit - Google Patents

Interlace scanning method and its unit

Info

Publication number
JPS54146920A
JPS54146920A JP5453878A JP5453878A JPS54146920A JP S54146920 A JPS54146920 A JP S54146920A JP 5453878 A JP5453878 A JP 5453878A JP 5453878 A JP5453878 A JP 5453878A JP S54146920 A JPS54146920 A JP S54146920A
Authority
JP
Japan
Prior art keywords
field
scanning
period
interlace
unit
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
Application number
JP5453878A
Other languages
Japanese (ja)
Inventor
Toshimoto Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP5453878A priority Critical patent/JPS54146920A/en
Publication of JPS54146920A publication Critical patent/JPS54146920A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain a desired interlace ratio by selecting the period of vertical scanning for every field and changing the period of vertical scanning of required fields.
CONSTITUTION: In case that 3:1 interlace scanning is obtained, individual vertical scanning driving signals are given to the first field L1, the second field L2 and the third field L3. For example, the first field period T4, the second field period T5 and the third field period T6 are made 10/3 times, 10/3 times and 7/3 times as long as horizontal scanning period H respectively, so that 3:1 interlace scanning can be obtained. Vertical scanning driving signals are obtained by shifting scanning pulses 6' successively by 1/3H and 2/3H in the first field and the second field respectively. That is, desired scanning pulses corresponding to scanning times of respective fields are generated from one pulse and are used for every field.
COPYRIGHT: (C)1979,JPO&Japio
JP5453878A 1978-05-10 1978-05-10 Interlace scanning method and its unit Pending JPS54146920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5453878A JPS54146920A (en) 1978-05-10 1978-05-10 Interlace scanning method and its unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5453878A JPS54146920A (en) 1978-05-10 1978-05-10 Interlace scanning method and its unit

Publications (1)

Publication Number Publication Date
JPS54146920A true JPS54146920A (en) 1979-11-16

Family

ID=12973435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5453878A Pending JPS54146920A (en) 1978-05-10 1978-05-10 Interlace scanning method and its unit

Country Status (1)

Country Link
JP (1) JPS54146920A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616377A (en) * 1979-07-11 1981-02-17 Philips Nv Interlace ratio switching television circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5616377A (en) * 1979-07-11 1981-02-17 Philips Nv Interlace ratio switching television circuit

Similar Documents

Publication Publication Date Title
JPS52122733A (en) Pulse line converter
JPS54146920A (en) Interlace scanning method and its unit
JPS54114042A (en) Synchronous signal generating circuit
JPS54124633A (en) Display circuit of television receiver
JPS57183180A (en) Pulse generating circuit for solid-state television camera
JPS5569845A (en) Picture scanning conversion system
JPS54149512A (en) Field discriminator
JPS5469024A (en) Pattern control unit
JPS55145476A (en) Producing circuit of horizontal synchronous pulse signal
SU406223A1 (en) Method of doubling the frequency
JPS54124923A (en) Processing system for multi-gradation picture signal
JPS54130865A (en) Pulse train separation system
JPS5538789A (en) Simple cross signal generator
JPS5412664A (en) Pulse generating system
JPS5492023A (en) Letter signal generating device
JPS5450225A (en) Sampling pulse generator
JPS51132954A (en) Waveform converter
JPS5375822A (en) Solid colour pickup device
JPS5523649A (en) Signal processing circuit
JPS5397737A (en) Color display unit
JPS554670A (en) Display control unit for magnified character
JPS5440540A (en) Isolator
JPS53136178A (en) Multiplex process controller
JPS53126822A (en) Liquid crystal matrix display unit
JPS5449021A (en) Circuit system of picture display unit