FR2435875A1 - Colour picture projection system - has three CRTs, one for each primary colour, with focussing lens before each phosphor screen - Google Patents

Colour picture projection system - has three CRTs, one for each primary colour, with focussing lens before each phosphor screen

Info

Publication number
FR2435875A1
FR2435875A1 FR7922467A FR7922467A FR2435875A1 FR 2435875 A1 FR2435875 A1 FR 2435875A1 FR 7922467 A FR7922467 A FR 7922467A FR 7922467 A FR7922467 A FR 7922467A FR 2435875 A1 FR2435875 A1 FR 2435875A1
Authority
FR
France
Prior art keywords
colour
crts
projection system
focussing lens
phosphor screen
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
FR7922467A
Other languages
French (fr)
Other versions
FR2435875B1 (en
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Publication of FR2435875A1 publication Critical patent/FR2435875A1/en
Application granted granted Critical
Publication of FR2435875B1 publication Critical patent/FR2435875B1/fr
Granted 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)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

The projection system has a projection screen (20) and three CRTs (11-13) for forming a colour picture on the screen, each projecting one of the three primary colours. Their phosphor screens (11a- 13a) face the centre (20c) of the projection screen (20), and are at the same distance (H) from it (20c). They are in line with each other, parallel to the vertical scanning direction of the light beams. A focussing lens (14-16) is provided in front of each phosphor screen, between the projection screen (20) and the corresponding CRT. The three principal planes (14a- 16a) of the lenses (14-16) face the centre of the projection screen (20), and are at the same distance from it.
FR7922467A 1978-09-07 1979-09-07 Colour picture projection system - has three CRTs, one for each primary colour, with focussing lens before each phosphor screen Granted FR2435875A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11103078A JPS5537088A (en) 1978-09-07 1978-09-07 Projection-type color television device

Publications (2)

Publication Number Publication Date
FR2435875A1 true FR2435875A1 (en) 1980-04-04
FR2435875B1 FR2435875B1 (en) 1984-11-30

Family

ID=14550610

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7922467A Granted FR2435875A1 (en) 1978-09-07 1979-09-07 Colour picture projection system - has three CRTs, one for each primary colour, with focussing lens before each phosphor screen

Country Status (3)

Country Link
JP (1) JPS5537088A (en)
DE (1) DE2936257A1 (en)
FR (1) FR2435875A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309594B4 (en) * 2003-03-05 2006-04-20 Convotherm Elektrogeräte GmbH Locking device for the door of large kitchen appliances

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57104655U (en) * 1980-12-16 1982-06-28
DE3216689A1 (en) * 1982-05-04 1983-11-10 Siemens AG, 1000 Berlin und 8000 München Arrangement for displaying information

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604042A1 (en) * 1975-02-03 1976-08-05 Fuji Photo Film Co Ltd REAR PROJECTION SCREEN
DE2656170A1 (en) * 1975-12-11 1977-06-23 Sanyo Electric Co TV PROJECTION ARRANGEMENT
FR2375776A1 (en) * 1976-12-27 1978-07-21 Saba Gmbh COLOR IMAGE PROJECTION DEVICE

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS583530B2 (en) * 1975-02-28 1983-01-21 ソニー株式会社 rear projector armchair
JPS5947518B2 (en) * 1976-06-28 1984-11-19 三洋電機株式会社 Projection type color television equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604042A1 (en) * 1975-02-03 1976-08-05 Fuji Photo Film Co Ltd REAR PROJECTION SCREEN
DE2656170A1 (en) * 1975-12-11 1977-06-23 Sanyo Electric Co TV PROJECTION ARRANGEMENT
FR2375776A1 (en) * 1976-12-27 1978-07-21 Saba Gmbh COLOR IMAGE PROJECTION DEVICE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10309594B4 (en) * 2003-03-05 2006-04-20 Convotherm Elektrogeräte GmbH Locking device for the door of large kitchen appliances

Also Published As

Publication number Publication date
FR2435875B1 (en) 1984-11-30
DE2936257A1 (en) 1980-03-20
JPS5537088A (en) 1980-03-14

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