JPS55133189A - Projection type television receiver - Google Patents

Projection type television receiver

Info

Publication number
JPS55133189A
JPS55133189A JP2642780A JP2642780A JPS55133189A JP S55133189 A JPS55133189 A JP S55133189A JP 2642780 A JP2642780 A JP 2642780A JP 2642780 A JP2642780 A JP 2642780A JP S55133189 A JPS55133189 A JP S55133189A
Authority
JP
Japan
Prior art keywords
screen
optical path
ray tube
cathode ray
prism
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.)
Granted
Application number
JP2642780A
Other languages
Japanese (ja)
Other versions
JPS5740708B2 (en
Inventor
Koichi Takeuchi
Satoshi Shimada
Masami Himuro
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.)
Sony Corp
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 JP2642780A priority Critical patent/JPS55133189A/en
Publication of JPS55133189A publication Critical patent/JPS55133189A/en
Publication of JPS5740708B2 publication Critical patent/JPS5740708B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Abstract

PURPOSE:To reduce the deterioration of picture quality when the picture is projected with extension, by providing the optical path division means splitting the optical path into a plurality between the cathode ray tube and the screen. CONSTITUTION:The optical path from the cathode ray tube 1 to the screen 2 is split with prism to form two projection images slightly shifted parallelly toward vertical direction on the screen 2 in the range within one scanning line interval, and these projection images are synthesized on the screen 2 to obtain the projection image 4a. The number of the horizontal scanning lines is doubled in this projection image 4a not to make distinction the stripes and to reduce the effect of moire. As the means splitting the optical path from the cathode ray tube 1, the methods such as prism, refraction of plate glass, and use of a right triangle prism having narrow top angle in the cross section, can be considered.
JP2642780A 1980-03-03 1980-03-03 Projection type television receiver Granted JPS55133189A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2642780A JPS55133189A (en) 1980-03-03 1980-03-03 Projection type television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2642780A JPS55133189A (en) 1980-03-03 1980-03-03 Projection type television receiver

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP786972A Division JPS5531671B2 (en) 1972-01-20 1972-01-20

Publications (2)

Publication Number Publication Date
JPS55133189A true JPS55133189A (en) 1980-10-16
JPS5740708B2 JPS5740708B2 (en) 1982-08-30

Family

ID=12193211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2642780A Granted JPS55133189A (en) 1980-03-03 1980-03-03 Projection type television receiver

Country Status (1)

Country Link
JP (1) JPS55133189A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06194619A (en) * 1992-07-03 1994-07-15 Casio Comput Co Ltd Liquid crystal projector

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4878824A (en) * 1972-01-20 1973-10-23

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4878824A (en) * 1972-01-20 1973-10-23

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06194619A (en) * 1992-07-03 1994-07-15 Casio Comput Co Ltd Liquid crystal projector

Also Published As

Publication number Publication date
JPS5740708B2 (en) 1982-08-30

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