JPS5545223A - Color television receiver - Google Patents

Color television receiver

Info

Publication number
JPS5545223A
JPS5545223A JP11824678A JP11824678A JPS5545223A JP S5545223 A JPS5545223 A JP S5545223A JP 11824678 A JP11824678 A JP 11824678A JP 11824678 A JP11824678 A JP 11824678A JP S5545223 A JPS5545223 A JP S5545223A
Authority
JP
Japan
Prior art keywords
flowed
fluorescent material
flyback time
receiving tube
beam current
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
JP11824678A
Inventor
Susumu Akazawa
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP11824678A priority Critical patent/JPS5545223A/en
Publication of JPS5545223A publication Critical patent/JPS5545223A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to obtain constant-magnitude index signals surely at the black level of video signals by a simple means.
CONSTITUTION: An index fluorescent material stripe is formed together with red, green and blue fluorescent material stripes on the panel inside face of color receiving tube 1, and photo detector 4 to detect light 3 emitted when electron beam 2 scans the index fluorescent material stripe is provided. Output Ec of subtractor 22 is the difference between the output voltage of detector 4 in the horizontal flyback time where the beam current is flowed and the output voltage in the adjacent horizontal flyback time where the beam current is not flowed, and potential Eo given to first grid 5 of receiving tube 1 in every other horiziontal flyback time in the vertical flyback time is controlled by feedback so that the beam current flowed in this time may be fixed. Then, the clip level is controlled by the output level of comparison amplifier 23 so that the black level may be Eo. Color signals where this black level is set are switched by switch circuit 17 and are given to first grid 5 of receiving tube.
COPYRIGHT: (C)1980,JPO&Japio
JP11824678A 1978-09-26 1978-09-26 Color television receiver Pending JPS5545223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11824678A JPS5545223A (en) 1978-09-26 1978-09-26 Color television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11824678A JPS5545223A (en) 1978-09-26 1978-09-26 Color television receiver

Publications (1)

Publication Number Publication Date
JPS5545223A true JPS5545223A (en) 1980-03-29

Family

ID=14731848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11824678A Pending JPS5545223A (en) 1978-09-26 1978-09-26 Color television receiver

Country Status (1)

Country Link
JP (1) JPS5545223A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6433827B1 (en) 1999-04-13 2002-08-13 Thomson Licensing Sa Measurement-free G2 calibration of color picture tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6433827B1 (en) 1999-04-13 2002-08-13 Thomson Licensing Sa Measurement-free G2 calibration of color picture tubes

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