TW200731795A - Cathode ray tube having improved light output gradient and visual perception - Google Patents

Cathode ray tube having improved light output gradient and visual perception

Info

Publication number
TW200731795A
TW200731795A TW095130917A TW95130917A TW200731795A TW 200731795 A TW200731795 A TW 200731795A TW 095130917 A TW095130917 A TW 095130917A TW 95130917 A TW95130917 A TW 95130917A TW 200731795 A TW200731795 A TW 200731795A
Authority
TW
Taiwan
Prior art keywords
light output
ray tube
cathode ray
visual perception
improved light
Prior art date
Application number
TW095130917A
Other languages
Chinese (zh)
Inventor
Robert Lloyd Barbin
Istvan Gorog
Original Assignee
Thomson Licensing
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 Licensing filed Critical Thomson Licensing
Publication of TW200731795A publication Critical patent/TW200731795A/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
    • H04N5/59—Control of contrast or brightness in dependence upon beam current of cathode ray tube

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

A cathode ray tube (CRT) having a glass envelope is disclosed. The glass envelope is formed of a rectangular faceplate panel having a viewing screen and a tubular neck connected thereto by a funnel. An electron gun is positioned in the neck for directing electron beams toward the faceplate panel. The electron beams emitted from individual cathodes of the electron gun form individual sub-images of a corresponding particular color when scanned on the screen according to a video input signal. A video signal processing system having luminance processing is employed to correct the light output at a plurality of points along the viewing screen by adjusting the drive voltage of the video signal according to a voltage correction factor calculated to achieve desired light output at each point.
TW095130917A 2005-08-31 2006-08-23 Cathode ray tube having improved light output gradient and visual perception TW200731795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2005/031166 WO2007027181A1 (en) 2005-08-31 2005-08-31 Cathode ray tube having improved light output gradient and visual perception

Publications (1)

Publication Number Publication Date
TW200731795A true TW200731795A (en) 2007-08-16

Family

ID=36218488

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095130917A TW200731795A (en) 2005-08-31 2006-08-23 Cathode ray tube having improved light output gradient and visual perception

Country Status (2)

Country Link
TW (1) TW200731795A (en)
WO (1) WO2007027181A1 (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0324991A1 (en) * 1988-01-19 1989-07-26 Magnavox Government and Industrial Electronics Company Display control apparatus
JPH08336062A (en) * 1995-06-08 1996-12-17 Sony Corp Television receiver
US6285397B1 (en) * 1997-01-16 2001-09-04 Display Laboratories, Inc. Alignment of cathode ray tube video displays using a host computer processor

Also Published As

Publication number Publication date
WO2007027181A1 (en) 2007-03-08

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