JPS5643886A - Projection color television receiver - Google Patents

Projection color television receiver

Info

Publication number
JPS5643886A
JPS5643886A JP11966579A JP11966579A JPS5643886A JP S5643886 A JPS5643886 A JP S5643886A JP 11966579 A JP11966579 A JP 11966579A JP 11966579 A JP11966579 A JP 11966579A JP S5643886 A JPS5643886 A JP S5643886A
Authority
JP
Japan
Prior art keywords
cathode
ray tube
dichroic mirror
thickness
red
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
JP11966579A
Other languages
Japanese (ja)
Inventor
Seiji Fujisawa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP11966579A priority Critical patent/JPS5643886A/en
Publication of JPS5643886A publication Critical patent/JPS5643886A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE:To prevent the color shading of a three-tube projection TV set on the dichroic mirror composition system, by controlling the thickness of a film constituting a dichroic mirror. CONSTITUTION:At the incident side of red-reflective dichroic mirror (DM)5R red cathode-ray tube 1R is arranged, at that of blue-reflective DM5B blue cathode-ray tube 1B, and at the other incident side of DM green cathode-ray tube 1G. Projector lens 3 is arranged at the opposite side of DM and respective primary-color pictures are projected being mixed together. Then when main beams a' and b' from image positions (a) and (b) of cathode-ray tube 1G to lens 3 strike DM, the film of DM is varied in thickness according to their incident angles and equalized to the optical film thickness of optical axis O' of center image O to DM. Thus, color shading is prevented.
JP11966579A 1979-09-17 1979-09-17 Projection color television receiver Pending JPS5643886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11966579A JPS5643886A (en) 1979-09-17 1979-09-17 Projection color television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11966579A JPS5643886A (en) 1979-09-17 1979-09-17 Projection color television receiver

Publications (1)

Publication Number Publication Date
JPS5643886A true JPS5643886A (en) 1981-04-22

Family

ID=14767028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11966579A Pending JPS5643886A (en) 1979-09-17 1979-09-17 Projection color television receiver

Country Status (1)

Country Link
JP (1) JPS5643886A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457404A2 (en) * 1990-05-16 1991-11-21 Koninklijke Philips Electronics N.V. Short focal length color projector employing dichroic mirror block

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010019A (en) * 1973-05-23 1975-02-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5010019A (en) * 1973-05-23 1975-02-01

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0457404A2 (en) * 1990-05-16 1991-11-21 Koninklijke Philips Electronics N.V. Short focal length color projector employing dichroic mirror block

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