JPS5724169A - Television receiver - Google Patents

Television receiver

Info

Publication number
JPS5724169A
JPS5724169A JP9970680A JP9970680A JPS5724169A JP S5724169 A JPS5724169 A JP S5724169A JP 9970680 A JP9970680 A JP 9970680A JP 9970680 A JP9970680 A JP 9970680A JP S5724169 A JPS5724169 A JP S5724169A
Authority
JP
Japan
Prior art keywords
focus
circuit
profile
delay line
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
Application number
JP9970680A
Other languages
Japanese (ja)
Inventor
Tetsuo Sakai
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9970680A priority Critical patent/JPS5724169A/en
Publication of JPS5724169A publication Critical patent/JPS5724169A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/26—Modifications of scanning arrangements to improve focusing

Abstract

PURPOSE:To increase the video quality, by automatically controlling the focus voltage for the profile in which the lightness of picture is finely changed and for the uniform light part. CONSTITUTION:A delay line 21 constituting a profile detection circuit 14 is split into two, delay line 21a, 21b serially, and the middle point of connection is connected to a video signal amplifying circuit 12. The output of subtractor 22 is inputted to a full wave rectifying circuit 20 of a focus control circuit 15. A switching circuit 32 selects either one of focus voltages VF1, VF2 according to the output of a threshold circuit 31 and it is applied to a focus electrode of a picture tube 13. Thus, the normal focus voltage VF1 is applied to the profile of a video signal and the focus is shifted to the part having uniform illumination, allowing to reduce the effect of noise on visuality.
JP9970680A 1980-07-21 1980-07-21 Television receiver Pending JPS5724169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9970680A JPS5724169A (en) 1980-07-21 1980-07-21 Television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9970680A JPS5724169A (en) 1980-07-21 1980-07-21 Television receiver

Publications (1)

Publication Number Publication Date
JPS5724169A true JPS5724169A (en) 1982-02-08

Family

ID=14254500

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9970680A Pending JPS5724169A (en) 1980-07-21 1980-07-21 Television receiver

Country Status (1)

Country Link
JP (1) JPS5724169A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0530375A (en) * 1991-06-26 1993-02-05 Matsushita Electric Ind Co Ltd Display device
JP2007314121A (en) * 2006-05-29 2007-12-06 Chiba Inst Of Technology Vehicle
US8544572B2 (en) 2004-05-26 2013-10-01 Chiba Institute Of Technology Car, walking apparatus, and method of determining shape of wheel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0530375A (en) * 1991-06-26 1993-02-05 Matsushita Electric Ind Co Ltd Display device
US8544572B2 (en) 2004-05-26 2013-10-01 Chiba Institute Of Technology Car, walking apparatus, and method of determining shape of wheel
US8561734B2 (en) 2004-05-26 2013-10-22 Chiba Institute Of Technology Car, walking apparatus, and method of determining shape of wheel
JP2007314121A (en) * 2006-05-29 2007-12-06 Chiba Inst Of Technology Vehicle

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