EP0467304A2 - Image viewing device - Google Patents
Image viewing device Download PDFInfo
- Publication number
- EP0467304A2 EP0467304A2 EP19910111865 EP91111865A EP0467304A2 EP 0467304 A2 EP0467304 A2 EP 0467304A2 EP 19910111865 EP19910111865 EP 19910111865 EP 91111865 A EP91111865 A EP 91111865A EP 0467304 A2 EP0467304 A2 EP 0467304A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fact
- viewing device
- complex images
- elements
- display window
- 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
Links
- 238000010894 electron beam technology Methods 0.000 claims abstract description 6
- 230000003287 optical effect Effects 0.000 claims description 12
- 238000009826 distribution Methods 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- QCDFBFJGMNKBDO-UHFFFAOYSA-N Clioquinol Chemical compound C1=CN=C2C(O)=C(I)C=C(Cl)C2=C1 QCDFBFJGMNKBDO-UHFFFAOYSA-N 0.000 claims 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/18—Luminescent screens
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/128—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digitally controlled display tubes
Definitions
- the present invention relates to a viewing device of complex images, for example of the television type, particularly for large screens of a reduced depth, of the type comprising an envelope, whose internal wall is a cathodoluminescent screen, in which phospers are excited by a multitude of electron beams, controlled in accordance of the image to be displayed, a display window, a multitude of close-spaced sustaining elements.
- the present invention has as its object a viewing device of complex images, for example of the television type, particularly for large screens of a reduced depth, of the type comprising an envelope, whose internal wall is a cathodoluminescent screen, in which phospers are excited by a multitude of electron beams, controlled in accordance of the image to be displayed, a display window, a multitude of close spaced sustaining elements.
- the characterising elements of the image viewing device consists in the fact that the contact points of said sustaining elements 11 with said display window 3 are practically made invisible by reflecting elements 7 placed in appropriate housings 4 situated in said display window.
- 1 and 2 indicate the lateral walls of two of the multitude of chambers, in this case represented by picture tubes, that when assembled make up a viewing screen.
- a diplay window of the device is indicated.
- 4 indicates a housing, making up part of said display window 3, of a sustaining element 11 constituted, in this case, by two terminal sections of two adjacent picture tubes welded together at the walls 1 and 2.
- Such housing 4 may be obtained by grinding treatment, or can be constituted by elements located on a flat plate, otherwise it can be constituted by elements located on and applied to an extremity of the sustaining elements.
- the reference number 7 indicates a reflecting element constituted by soft metal wedge strips presenting a mirrored surface, which is a functioning part of the housing 4.
- Such mirrored surfaces of said reflective element 7 and the phosphors 5 and 6, placed in proximity of said housing 4, are inclined and set back with respect to the remainder of the internal wall of the display window 3.
- Two optical opening are represented with the number 10 that, are obtained by two dihedrons constituted by the inclined surfaces of said reflective element 7 and of said phosphors 5 and 6.
- Such optical openings constitute the ideal continuation of the regular distribution of the phosphors on the picture tubes.
- the surface of the display window 3, in correspondance of the optical openings 10, is made up of optical material diffused with the aim of making the angular arrangement luminous, given out from said optical opening 10, similar to that given out from the remaining phosphor of the screen.
- the window display 3 a plurality of domes, in this case picture tubes comprising one or more means for the generation of electrical or magnetic fields for focusing and deflecting, and the sustaining elements 11, a principle envelope is obtained.
- R, G, B the phophors corresponding to the three primary colours of colour televisions (red, green and blue) are indicated.
- the picture tubes utilised in this example are of the "beam-index" type and the phosphors index are indicated with the numbers 8 and 9.
- each of the said picture tubes reproduces a portion of the image to be viewed.
- This type of reproduction is possible by means of a known techniques that consist in the in the division of the sequential video signal in many parts to be addressed, in a parallel manner, to every picture tube of the system.
- the picture tubes utilised in this example have the characteristics of using a single beam of electrons and do not present a filtering shadow mask of the beams of electrons. In this case there are no problems of beam convergency, the so called doming effect is not a problem and there are no problems of power dispersion.
- the beam of electrons scan, in an orderly fashion, the vertical strips of red, green and blue phosphors and the selection of colour is obtained furnishing the beam the correct current at the right time.
- the piloting circuit must have precise information regarding the position of the beam of electrons in respect to the strips of phosphors.
- the phosphors index 8 and 9 emitting ultra violet rays placed on the alluminium sheet blanketing the phosphors of the screen towards the electronic gun.
- the ultraviolet light, emitted from said strips called index is collected by a photodetector and converted into an electrical signal for the pilot circuit.
- Another technique is when the coloured phosphor strips are horizontally arranged and the three phosphors become excited subsequently every three line scannings.
- the device functions in the following way:
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Liquid Crystal (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
Description
- The present invention relates to a viewing device of complex images, for example of the television type, particularly for large screens of a reduced depth, of the type comprising an envelope, whose internal wall is a cathodoluminescent screen, in which phospers are excited by a multitude of electron beams, controlled in accordance of the image to be displayed, a display window, a multitude of close-spaced sustaining elements.
- In recent years there have been notable developments in the field of electronic viewing systems, with the aim of setting aside, from its pre-eminent position in this field, the traditional cathode ray picture tube or the kinescope tube. In particular , a multitude of innovative viewing systems have been proposed, based on different physical principles. Progress in the realisation of improved Picture tubes has continued however, leading to results above all in the reduction of volume and weight of the picture tube, which in the previous traditional solutions, constituted the major disadvantages. Such disadvantages become considerable when, for the realisation of a large picture tube, a number of tubes placed together are utilised. Instead of the problem of the volume and weight, a problem of the vision of the image arises in the adjacent points between the various tubes, infact the image results in having interruptions. Interruptions corresponding to the delimitation of each single picture tube. In the case in which a single vaccum envelope is used, divided in various chambers, such interruptions correspond to the strengthening divisions, without which the weight and encumbrance become unacceptable. A known solution, in the case in which a single envelope is used, indentations in the form of a V are created on the eternal wall of the screens display window, corresponding to said strengthening dividers of the compartment. Said indentations have rounded edges and furthermore the display window is slightly convex. All of the above serves in creating an optical effect that makes the mentioned dividers partially invisible. See American patent N° 4.622.492.
- However, this solution is not satisfactory as the dividers become visable whenever the viewing angle of the screen is not that desired. The aim of the present invention is to realise an image viewing device which does not present the above mentioned disadvantages.
- To allow for such aims, the present invention has as its object a viewing device of complex images, for example of the television type, particularly for large screens of a reduced depth, of the type comprising an envelope, whose internal wall is a cathodoluminescent screen, in which phospers are excited by a multitude of electron beams, controlled in accordance of the image to be displayed, a display window, a multitude of close spaced sustaining elements. The characterising elements of the image viewing device consists in the fact that the contact points of said sustaining
elements 11 with saiddisplay window 3 are practically made invisible by reflecting elements 7 placed inappropriate housings 4 situated in said display window. Further aims and advantages of the present invention will become clear from the following detailed description, carried out with reference to the annexed drawings, supplied as non-limiting example, wherein 1 and 2 indicate the lateral walls of two of the multitude of chambers, in this case represented by picture tubes, that when assembled make up a viewing screen. With reference number 3 a diplay window of the device is indicated. 4 indicates a housing, making up part of saiddisplay window 3, of a sustainingelement 11 constituted, in this case, by two terminal sections of two adjacent picture tubes welded together at thewalls 1 and 2.Such housing 4 may be obtained by grinding treatment, or can be constituted by elements located on a flat plate, otherwise it can be constituted by elements located on and applied to an extremity of the sustaining elements. 5 and 6 indicate the collocation of the phosphors deposited on the extremes of a picture tube or in proximity of thehousing 4. The reference number 7 indicates a reflecting element constituted by soft metal wedge strips presenting a mirrored surface, which is a functioning part of thehousing 4. Such mirrored surfaces of said reflective element 7 and thephosphors housing 4, are inclined and set back with respect to the remainder of the internal wall of thedisplay window 3. Two optical opening are represented with thenumber 10 that, are obtained by two dihedrons constituted by the inclined surfaces of said reflective element 7 and of saidphosphors display window 3, in correspondance of theoptical openings 10, is made up of optical material diffused with the aim of making the angular arrangement luminous, given out from saidoptical opening 10, similar to that given out from the remaining phosphor of the screen. - Welding together, in a vacuum tight manner, the window display 3, a plurality of domes, in this case picture tubes comprising one or more means for the generation of electrical or magnetic fields for focusing and deflecting, and the
sustaining elements 11, a principle envelope is obtained. - With the letters R, G, B the phophors corresponding to the three primary colours of colour televisions (red, green and blue) are indicated. The picture tubes utilised in this example are of the "beam-index" type and the phosphors index are indicated with the
numbers - When we encounter systems encorporating large screens, where a number of picture tubes are used adjacent between themselves, each of the said picture tubes reproduces a portion of the image to be viewed. This type of reproduction is possible by means of a known techniques that consist in the in the division of the sequential video signal in many parts to be addressed, in a parallel manner, to every picture tube of the system.
- The picture tubes utilised in this example have the characteristics of using a single beam of electrons and do not present a filtering shadow mask of the beams of electrons. In this case there are no problems of beam convergency, the so called doming effect is not a problem and there are no problems of power dispersion. In the "beam-index" technique the beam of electrons scan, in an orderly fashion, the vertical strips of red, green and blue phosphors and the selection of colour is obtained furnishing the beam the correct current at the right time. In order to obtain this, the piloting circuit must have precise information regarding the position of the beam of electrons in respect to the strips of phosphors. This is carried out with the aid of the
phosphors index - The beam of electrons that scans the screen is piloted by the piloting circuit in such a way so as to hit all of the phosphors in function of the image to be reproduced. When the phosphor to be hit is the more extreme with relation to the screen, in this case the
phosphor phosphor optical opening 10 with approximately the same angular distribution of the light emitted from the other phosphors. It is to be taken into consideration that thedisplay window 3 is only one plate on which picture tubes are constructed thus creating a multidome type structure. In such a solution, it has been established that the image viewing device completely achieves the set aim in as much the adjacent points result in being really cancelled by the optical effect created by the mirrored element 7. It is also to be noted that the mirrored element 7 in its posterior section is formed in such a way that thesustaining elements 11 are centered and that the pressure exercised by them be equally placed. - From the outlined description the advantages of the image viewing device, object of the present invention become clear, of which the efficiency of the system and the quality of the reproduced image are cited.
- It is clear that numerous varients are possible, by the man of the art, to the image viewing device described as an example, without however departing from the novelty principles inherent in the invention, among which the possibility to provide for each chamber of which the envelope is constituted, one or more matrix structures of crossed electrodes that focuse a multitude of beams of electrons, controlling the intensity and eventually deflecting them on small portions of the screen, being such beams obtained starting from a flat source of electrons or from a multitude of linear or punctiform sources.
Claims (26)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT4815290 | 1990-07-17 | ||
IT48152A IT1241491B (en) | 1990-07-17 | 1990-07-17 | IMAGE VIEWER DEVICE. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0467304A2 true EP0467304A2 (en) | 1992-01-22 |
EP0467304A3 EP0467304A3 (en) | 1993-03-17 |
EP0467304B1 EP0467304B1 (en) | 1997-01-29 |
Family
ID=11264865
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91111865A Expired - Lifetime EP0467304B1 (en) | 1990-07-17 | 1991-07-16 | Image viewing device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0467304B1 (en) |
DE (1) | DE69124433T2 (en) |
ES (1) | ES2099719T3 (en) |
IT (1) | IT1241491B (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0139314A1 (en) * | 1983-08-25 | 1985-05-02 | Koninklijke Philips Electronics N.V. | Picture display panel |
EP0405262A1 (en) * | 1989-06-19 | 1991-01-02 | Matsushita Electric Industrial Co., Ltd. | Flat panel display device |
-
1990
- 1990-07-17 IT IT48152A patent/IT1241491B/en active IP Right Grant
-
1991
- 1991-07-16 ES ES91111865T patent/ES2099719T3/en not_active Expired - Lifetime
- 1991-07-16 DE DE69124433T patent/DE69124433T2/en not_active Expired - Lifetime
- 1991-07-16 EP EP91111865A patent/EP0467304B1/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0139314A1 (en) * | 1983-08-25 | 1985-05-02 | Koninklijke Philips Electronics N.V. | Picture display panel |
EP0405262A1 (en) * | 1989-06-19 | 1991-01-02 | Matsushita Electric Industrial Co., Ltd. | Flat panel display device |
Also Published As
Publication number | Publication date |
---|---|
DE69124433D1 (en) | 1997-03-13 |
IT9048152A0 (en) | 1990-07-17 |
EP0467304A3 (en) | 1993-03-17 |
IT9048152A1 (en) | 1992-01-17 |
IT1241491B (en) | 1994-01-17 |
EP0467304B1 (en) | 1997-01-29 |
DE69124433T2 (en) | 1997-07-10 |
ES2099719T3 (en) | 1997-06-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP3295669B2 (en) | Improved electroluminescent display | |
US4166233A (en) | Phosphor screen for flat panel color display | |
US4158157A (en) | Electron beam cathodoluminescent panel display | |
US4023063A (en) | Color tube having channel electron multiplier and screen pattern of concentric areas luminescent in different colors | |
US4807014A (en) | Three tube color projection television system having multispot blue tube and single-spot red and green tubes | |
US3890541A (en) | Cathode ray tube apparatus | |
US5751109A (en) | Segmented cold cathode display panel | |
US4598233A (en) | Color display tube and device having such a tube | |
US4034255A (en) | Vane structure for a flat image display device | |
US5144416A (en) | Video display and imaging devices having liquid crystal scanning | |
EP0467304B1 (en) | Image viewing device | |
US4220892A (en) | Phosphor screen for modular flat panel display device | |
JPS63155535A (en) | Planar type cathode-ray tube | |
US4386364A (en) | Image display apparatus | |
US6515639B1 (en) | Cathode ray tube with addressable nanotubes | |
US3408456A (en) | Method for providing high definition colored television image | |
US4099085A (en) | Parallel vane structure for a flat display device | |
AU617962B2 (en) | Flat display device and cathode unit | |
KR200249594Y1 (en) | Flat pannel display based on miniaturized multiple CRT | |
KR100396541B1 (en) | Flat panel TV based on minimized multiple CRT | |
JP2668960B2 (en) | Display device | |
JPS61168844A (en) | Image display device | |
JP2000268750A (en) | Image display device | |
US6864625B2 (en) | Color pixel element cathode ray tube | |
JPH0377249A (en) | Image display device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): DE ES FR GB NL |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): DE ES FR GB NL |
|
17P | Request for examination filed |
Effective date: 19931125 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MALTESE, PAOLO |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SOCIETA ITALIANA PER LO SVILUPPO DELL'ELETTRONICA |
|
17Q | First examination report despatched |
Effective date: 19950925 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
111L | Licence recorded |
Free format text: 961107 0100 DAEWOO ELECTRONICS CO. LTD |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB NL |
|
REF | Corresponds to: |
Ref document number: 69124433 Country of ref document: DE Date of ref document: 19970313 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2099719 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: FR Ref legal event code: CD Ref country code: FR Ref legal event code: CA Ref country code: FR Ref legal event code: TP |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 20100707 Year of fee payment: 20 Ref country code: NL Payment date: 20100723 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20100802 Year of fee payment: 20 Ref country code: DE Payment date: 20100816 Year of fee payment: 20 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20100721 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69124433 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R071 Ref document number: 69124433 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: V4 Effective date: 20110716 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20110715 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20110715 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20110716 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20110717 |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20130722 |