MY111249A - Video system including apparatus for deactivating an automatic control arrangement - Google Patents

Video system including apparatus for deactivating an automatic control arrangement

Info

Publication number
MY111249A
MY111249A MYPI92001432A MYPI19921432A MY111249A MY 111249 A MY111249 A MY 111249A MY PI92001432 A MYPI92001432 A MY PI92001432A MY PI19921432 A MYPI19921432 A MY PI19921432A MY 111249 A MY111249 A MY 111249A
Authority
MY
Malaysia
Prior art keywords
contrast control
white
deactivating
level
threshold level
Prior art date
Application number
MYPI92001432A
Inventor
Lawrence O'brien Robert
Adamson Lagoni William
Original Assignee
Thomson Consumer Electronics Inc
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 Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of MY111249A publication Critical patent/MY111249A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Picture Signal Circuits (AREA)

Abstract

A PROJECTION TELEVISION SYSTEM INCLUDES AN AUTOMATIC CONTRAST CONTROL SECTION (39) FOR CONTROLLING THE AMPLITUDE OF THE LUMINANCE SIGNAL IN RESPONSE TO THE PEAK VALUE OF A LUMINANCE-REPRESENTATIVE IMAGE COMPONENT SIGNAL IN ORDER TO PREVENT WHITE-SPOT BLOOMING. CIRCUITRY (41) IS PROVIDED FOR DEACTIVATING THE AUTOMATIC CONTRAST CONTROL SECTION (39) WHEN A USER SETS (15) THE CONTRAST CONTROL LEVEL ABOVE A GIVEN THRESHOLD LEVEL, E.G., CORRESPONDING TO THE MAXIMUM CONTRAST CONTROL LEVEL. AS A RESULT WHITE-SPOT BLOOMING IS INHIBITED IN ORDER TO ENSURE SHARP IMAGES FOR A CONTRAST CONTROL RANGE BELOW THE GIVEN THRESHOLD LEVEL WHILE ALLOWING MAXIMUM WHITE IMAGE COMPONENTS TO BE PRODUCED (AT THE EXPENSE OF WHITE SPOT BLOOMING) WHEN THE CONTRAST CONTROL LEVEL IS SET ABOVE THE THRESHOLD LEVEL, DEPENDING ON THE PREFERENCE OF THE USER.
MYPI92001432A 1991-08-30 1992-08-10 Video system including apparatus for deactivating an automatic control arrangement MY111249A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US75181091A 1991-08-30 1991-08-30

Publications (1)

Publication Number Publication Date
MY111249A true MY111249A (en) 1999-10-30

Family

ID=25023580

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI92001432A MY111249A (en) 1991-08-30 1992-08-10 Video system including apparatus for deactivating an automatic control arrangement

Country Status (7)

Country Link
JP (1) JPH05236385A (en)
KR (2) KR930005462A (en)
CN (1) CN1033129C (en)
MX (1) MX9205002A (en)
MY (1) MY111249A (en)
PL (1) PL169171B1 (en)
TW (1) TW248627B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10246120A1 (en) * 2002-10-01 2004-04-22 Deutsche Thomson-Brandt Gmbh Automatic contrast control with suppression of interference signals

Also Published As

Publication number Publication date
MX9205002A (en) 1993-04-01
PL169171B1 (en) 1996-06-28
PL295690A1 (en) 1993-03-08
CN1033129C (en) 1996-10-23
KR100252723B1 (en) 2000-04-15
JPH05236385A (en) 1993-09-10
CN1070783A (en) 1993-04-07
TW248627B (en) 1995-06-01
KR930005462A (en) 1993-03-23

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