CA1103299A - Color cathode ray tube with beam indexing stripes - Google Patents
Color cathode ray tube with beam indexing stripesInfo
- Publication number
- CA1103299A CA1103299A CA282,999A CA282999A CA1103299A CA 1103299 A CA1103299 A CA 1103299A CA 282999 A CA282999 A CA 282999A CA 1103299 A CA1103299 A CA 1103299A
- Authority
- CA
- Canada
- Prior art keywords
- stripes
- indexing
- color
- screen
- phosphor stripes
- 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.)
- Expired
Links
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
- H01J29/30—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
- H01J29/32—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
- H01J29/325—Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television with adjacent lines
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
TITLE OF THE INVENTION
COLOR CATHODE RAY TUBE WITH BEAN INDEXING STRIPES
ABSTRACT OF THE DISCLOSURE
A color cathode ray tube, such as a color television picture tube of beam indexing type having a target structure including a screen comprising an array of different color lighting-emitting phosphor stripes and indexing means comprising a plurality of radiation-emissive indexing stripes extending parallel to the phosphor stripes in which the beam indexing stripes are substantially extending beyond a hypothetical envelope curve connecting the vertical edges of the phosphor stripes so as to provide accurate color reproduction.
COLOR CATHODE RAY TUBE WITH BEAN INDEXING STRIPES
ABSTRACT OF THE DISCLOSURE
A color cathode ray tube, such as a color television picture tube of beam indexing type having a target structure including a screen comprising an array of different color lighting-emitting phosphor stripes and indexing means comprising a plurality of radiation-emissive indexing stripes extending parallel to the phosphor stripes in which the beam indexing stripes are substantially extending beyond a hypothetical envelope curve connecting the vertical edges of the phosphor stripes so as to provide accurate color reproduction.
Description
COLOR CAT~IODE R~Y TUBE WITH BEAM INDEXING STRIPES
B K_OUN~ OF Tllr INVENrlON
This invention relates to color c~thode ray tubes and particularly to tile improvenlent of a color televisioll picture tube of the beam indexing type.
A beam indexing type color picture tube l~as a vie~ing target structure which includes a lumillescent screen comprising a series of color ligllt-emittillg phosphor groups each of which is made up of a plurality of different color phosphor stripes disposed parallel to each other and substantially perpendicular to the direction of the beam scan~ -It also includes means responsive to electron bombardment for generating indexing signals for tlle purpose of synchronizing the color modulation of tlie electron beam wi-th -the scan thereof Usually the color phosphor stripes and tlle correspondingly positioned indexing stripes have the same lengtlls in a vertical direc-tion and a llyl)otlletical envelope curve conllectin~ the vertical edges of tlle pllosphor stripes has a barrel shape. ~-A hypothetical envelope curve connectin~ tlle vertical edges of the in-dexing stripes also shows the same sllape and it coincides with the enve-lope curve of tlle phosphor stripes.
i ~ , .
That is, in a conventional bealll indexing type color picture tube, both phosphor stripes and indexing stripes are lon(Jest at the screen center portion and their length is gradually shortened toward the edge portions along a hori20ntal axis of a screen. Such a barrel shaped feature of the screen originates in a glass panel configuration which is spherical or outwardly curved for maintaining the strength : against the at~ospheric pressure.
: Consequently, the indexing stripes at the horizontal edge portions of a screen have the length of V which is short by ~V as compared with the indexing stripes at the screen center. So, if tiie beam scan starts at the position of (a ~ aV) height, there are no indexillg signals ulltil the beam scans on the lon~est indexing stripe.
Tllerefore it is impossible to synchronize the color lilodulation of the electron beam with the scan. Consequently, it is impossible to obtain a correct color reproduction. For obtaining a good color reproduction all over the screen, it is necessary to make a scl-een cut along a V-vertical heigllt. This means that it is impossiblc to use some portions of the pllosphor screen area as effective screen area.
Further this prior indexing type tube screen has a defect in
B K_OUN~ OF Tllr INVENrlON
This invention relates to color c~thode ray tubes and particularly to tile improvenlent of a color televisioll picture tube of the beam indexing type.
A beam indexing type color picture tube l~as a vie~ing target structure which includes a lumillescent screen comprising a series of color ligllt-emittillg phosphor groups each of which is made up of a plurality of different color phosphor stripes disposed parallel to each other and substantially perpendicular to the direction of the beam scan~ -It also includes means responsive to electron bombardment for generating indexing signals for tlle purpose of synchronizing the color modulation of tlie electron beam wi-th -the scan thereof Usually the color phosphor stripes and tlle correspondingly positioned indexing stripes have the same lengtlls in a vertical direc-tion and a llyl)otlletical envelope curve conllectin~ the vertical edges of tlle pllosphor stripes has a barrel shape. ~-A hypothetical envelope curve connectin~ tlle vertical edges of the in-dexing stripes also shows the same sllape and it coincides with the enve-lope curve of tlle phosphor stripes.
i ~ , .
That is, in a conventional bealll indexing type color picture tube, both phosphor stripes and indexing stripes are lon(Jest at the screen center portion and their length is gradually shortened toward the edge portions along a hori20ntal axis of a screen. Such a barrel shaped feature of the screen originates in a glass panel configuration which is spherical or outwardly curved for maintaining the strength : against the at~ospheric pressure.
: Consequently, the indexing stripes at the horizontal edge portions of a screen have the length of V which is short by ~V as compared with the indexing stripes at the screen center. So, if tiie beam scan starts at the position of (a ~ aV) height, there are no indexillg signals ulltil the beam scans on the lon~est indexing stripe.
Tllerefore it is impossible to synchronize the color lilodulation of the electron beam with the scan. Consequently, it is impossible to obtain a correct color reproduction. For obtaining a good color reproduction all over the screen, it is necessary to make a scl-een cut along a V-vertical heigllt. This means that it is impossiblc to use some portions of the pllosphor screen area as effective screen area.
Further this prior indexing type tube screen has a defect in
2~ that it can not partially obtain the indexing signals 1~ there is a vertical shear bet~een the phosphor stripes and the indexing stripes and also if the beam scan curves up and do~n.
SU~ R~' O~ INv~Nrr-[oN
-Accorcling to this inverltioll, a ~eam indexing type color picture tube of hi ghly improved color reproducing characteristics can be obtained. The target struc-ture includes a screen comprising a periodic series oE color groups of parallel light-emitting phosphor s-tripes and an indexing means comprising a plurality of indexing stripes of radiation-emissive indexing material and spaces the:rebetween. The indexing stripes are at least equal in length to -the color phosphor stripes at a center portion of the screen and are progressively greater in length than the color phosphor s-tripes toward edge portions oE
the screen. The index stripes form a straight upper profile coincident with the path of an electron beam scan. Thus indexinq signals are received from all the indexing stripes during each scan of the screen includinq scans in which only a fraction of -the phosphor stripes are traversed. ~orrect color synchronization is therefore obtained for the entire area covered by the phosphor stripes. The picture reproduced by the screen is oE high quality in colors.
Accordingly, an object of this invention is to provide an improved beam indexing type color cathode ray tube which employs an improved target structure.
Another object of this invention is to provide an improved color picture tube of beam indexing type which has sufficient indexinq signal ~eneratina characteristics ncar thc corners of the screen.
Another object of this invention is to provide an improved color cathode ray tube of beam indexing type which can produce accurate color reproduction all over the phosphor screen.
SU~ R~' O~ INv~Nrr-[oN
-Accorcling to this inverltioll, a ~eam indexing type color picture tube of hi ghly improved color reproducing characteristics can be obtained. The target struc-ture includes a screen comprising a periodic series oE color groups of parallel light-emitting phosphor s-tripes and an indexing means comprising a plurality of indexing stripes of radiation-emissive indexing material and spaces the:rebetween. The indexing stripes are at least equal in length to -the color phosphor stripes at a center portion of the screen and are progressively greater in length than the color phosphor s-tripes toward edge portions oE
the screen. The index stripes form a straight upper profile coincident with the path of an electron beam scan. Thus indexinq signals are received from all the indexing stripes during each scan of the screen includinq scans in which only a fraction of -the phosphor stripes are traversed. ~orrect color synchronization is therefore obtained for the entire area covered by the phosphor stripes. The picture reproduced by the screen is oE high quality in colors.
Accordingly, an object of this invention is to provide an improved beam indexing type color cathode ray tube which employs an improved target structure.
Another object of this invention is to provide an improved color picture tube of beam indexing type which has sufficient indexinq signal ~eneratina characteristics ncar thc corners of the screen.
Another object of this invention is to provide an improved color cathode ray tube of beam indexing type which can produce accurate color reproduction all over the phosphor screen.
3.~
A further object of this invention is to provide an improved color cathode ray tube of the beam indexing type which can use all of the phos-phor area as an effec-tive screen.
~ A still further object of this invention is -to provide an improved beam indexing type color picture tube which can be correctly adjusted for color reproduction.
BRIEF DESCRIPTION OF THE DRAWINGS
'. ,, - _ The above, and other objects, features and advantages of this invention will become apparent from the following detailed description of illustrative embodiments which is to be reacl in connection with the accompanying drawings, wherein:
FIG. 1 is a perspective view, partly cut away, oF a beam indexing type color cathode ray tube according to this invention.
FIG. 2 is a fragmentary enlarged perspective view of the target structure of Fig. 1 cut along the line 2-2.
FIGS. 3 and 4 show the hypothetical envelope curve both of vertical edges of the phosphor stripes and vertical edges o-F the indexing stripes in a conventional beam indexing type color cathode ray tube and in this inventioned color picture tube, respec-tively.
-DETAIL~:D DESCRIPTION OF T~ PR~:FERRI;~D r.MBODIMr~NTS
Fo~ a better understanding of this inventioll, a aescription will be given of a beam indexing type color cathode ray tube in which the screen has no light absorbing stripes between the color phosphor stripes. But if necessary, they can be applied.
Figs. 1 and 2 show a beam indexing type co~or cathode ray tube according to this invention. An outwardlv curved rectangular-shaped glass panel 11 has, on the inner su~face thereof, a luminescent screen 20 comprising a series of color phosphor stripes, each of which is made up of a plurality (e.g. three) oE different color phosphor stripes 21, 22 an(l 23 disposed parallel to each other and substantially perpendicular to the direction of the beam scan. A thin metal layer 27, for example, of aluminum is disposed back of the luminescent screen 2~.
The beam indexing stripes 25 are disposed back of the metal layer, and parallel to the phosphor stripes.
A phototube 13 located on the funnel pOI-tiOIl 1? 0~ thc tube picks up the indexing signals which are generated when the electron beam scans across the indexing stripes 25.
The inclexing stripes 25 extend over the edges of the color phosphor stripes so that the indexing signals derived from the indexing stripes 25 provide inEormation regarding actual instantaneous pOSitiOIl of the electron beam on the screen wi-th relation to -the color phosphor stripes. The indexing ¢~
signals are enlployed in a si~nal utilization systelll 16 of a type known in the art to insllre that the proper electrical color signal is applied to the electron beam at all tinles.
Tn ~ile enlbodilllent illustrated, the phasing indexing stripes 25 occur at a rate wllich is equal to three-fourth (3/4) Of the ~ate of the three phosphor groups along the hori~ontal path. Th~ls, it is desirahle to maintain the ratio of the occurrence rate of the indexing stripes to the rate of the groups of three phosphor stripes a constant of a non-, integral numbe~ along all over the horizontal path.
Furtiler, the start signal generating stripe 2G of the same n)aterial of the indexing stripes is necessary at the position of the be~inlling of the sweep of the electron beam whicll is nenerated from the electron gun means 14. Altllough the beam is illustrated to sweep in the direction from le-ft -to right, the direction of sweep may be reversed.
If doing so, of course, the start signal nenerating stripe also must be formed at the reversed position.
As illustrated in Fig. 1~ the start sigllal generating stripe 26 is located at the far distant position From the left edge oF phosphor stripe screen. Further, it is required to have the sufficient vertical 2n length sucll as For the other indexing stripes.
~ .
~ v~t~3 Th~ pri~r ~rt is ilLustrate~ in ~lg. 3 which graphlc~lly shows th~
color phosphor strip~s 32 an~l tl,~ corr~spondingly positioned indexing ~tripes 30 having the same length in the vertical dlrection, keeping in mind that Fig. 3 only shows the upper halE of the screen an~ curves 30 and 32 sho~ hypothetical curves connecting the vertic~l edges o~ the indexing stripes and color pllospho-r stripes respectively.
~ccording to this invention tl-e beam indexing stripes 25 vertically extend beyond a hypothetical envelope cllrve 42 connecting the vertical edges of the color phospl~or stripes in a vertical direc-tion. Namely as shown in Fig. 2 the beam indexing stripes 25 are vertically longer than the respective pilospl~or stripes 21 22 23 of the three ~roups.
An emlodilllellt of the vertical lell~th relationship bet~leen the indexing stripes and the color pllospllor stripe is graphically shown in Fig. 4. In this figure the upper half of the screen is illustrated and the line 40 shows a hypothetical envelope curve connecting the vertical edges of the indexing stripes and tlle line ~2 indicates a hypothetical envelope curve connecting tl-e vertical edges of the color ~ -phosphor stripes.
2~ In this embodiment the phosphor stripes screen is formed as a barrel-shape which is determined by the inside configuration of the glass panel. On the contrary the indexing stripes have the same ver-tical length along the horizontal axis. For ~impli~ying tlle explanation in tllese Figures the indexing stripes are shown as a vertically straight line. But actually the applicable form o-F this invention is that the indexing stripes extend along the inside walls of tlle Flange por-tion 17 of the glass panel 11 D~
As is unclerstood from Fi~. 4 accordin~ to this invention the entire phospllor screen area can be useful as an effective screen ~ith a correct color synchroni~at-ion thus obtainin~ a maximum useful screell.
To obtain a target structure such as shown in Figs. 1 and 2 two kinds of mask pattern are used in a manufacturing process. At first three color phosphor stripes are formed on a glass panel by projecting the exposure light emanatetl frolll a light source throu~h the apertures of -the firs-t master pattern in l~hich tile apertures are 10 arranged at the occurrence rate of the three phnsr)llor qroups in a horizon~al direction. Then team indexing stripes are ~orllled by pro-jecting the li~ht from the sanle light source throllgi) the apertures of the second master pattern in which the apertures are arranged at the horizontal occurrence rate o-f the indexing stripes. The apertures 15 of the second master pattern are continuously longer than that of the first master pattern in a vertical direction.
By designing these master patterns as olle chooses~ variolls other configurations of the indexing stripes can be attached~ For example a hypothetical envelope curve ~0 of the indexil1g stripes having the 20 similar barrel shape as the phosphor stripes envelope curve can be considered~
~3~
In case the beam sweeps in the direction from left to right, in the right half of the screen, the indexing stripes envelope curve 40 can coincide with the pllosphor stripes envelope curve 42, if desired.
The horizontal width of a beam indexing stripe is not explained ~ in the embodiment of the invention. But as is well known, various widths are applicable according to necessity.
A further object of this invention is to provide an improved color cathode ray tube of the beam indexing type which can use all of the phos-phor area as an effec-tive screen.
~ A still further object of this invention is -to provide an improved beam indexing type color picture tube which can be correctly adjusted for color reproduction.
BRIEF DESCRIPTION OF THE DRAWINGS
'. ,, - _ The above, and other objects, features and advantages of this invention will become apparent from the following detailed description of illustrative embodiments which is to be reacl in connection with the accompanying drawings, wherein:
FIG. 1 is a perspective view, partly cut away, oF a beam indexing type color cathode ray tube according to this invention.
FIG. 2 is a fragmentary enlarged perspective view of the target structure of Fig. 1 cut along the line 2-2.
FIGS. 3 and 4 show the hypothetical envelope curve both of vertical edges of the phosphor stripes and vertical edges o-F the indexing stripes in a conventional beam indexing type color cathode ray tube and in this inventioned color picture tube, respec-tively.
-DETAIL~:D DESCRIPTION OF T~ PR~:FERRI;~D r.MBODIMr~NTS
Fo~ a better understanding of this inventioll, a aescription will be given of a beam indexing type color cathode ray tube in which the screen has no light absorbing stripes between the color phosphor stripes. But if necessary, they can be applied.
Figs. 1 and 2 show a beam indexing type co~or cathode ray tube according to this invention. An outwardlv curved rectangular-shaped glass panel 11 has, on the inner su~face thereof, a luminescent screen 20 comprising a series of color phosphor stripes, each of which is made up of a plurality (e.g. three) oE different color phosphor stripes 21, 22 an(l 23 disposed parallel to each other and substantially perpendicular to the direction of the beam scan. A thin metal layer 27, for example, of aluminum is disposed back of the luminescent screen 2~.
The beam indexing stripes 25 are disposed back of the metal layer, and parallel to the phosphor stripes.
A phototube 13 located on the funnel pOI-tiOIl 1? 0~ thc tube picks up the indexing signals which are generated when the electron beam scans across the indexing stripes 25.
The inclexing stripes 25 extend over the edges of the color phosphor stripes so that the indexing signals derived from the indexing stripes 25 provide inEormation regarding actual instantaneous pOSitiOIl of the electron beam on the screen wi-th relation to -the color phosphor stripes. The indexing ¢~
signals are enlployed in a si~nal utilization systelll 16 of a type known in the art to insllre that the proper electrical color signal is applied to the electron beam at all tinles.
Tn ~ile enlbodilllent illustrated, the phasing indexing stripes 25 occur at a rate wllich is equal to three-fourth (3/4) Of the ~ate of the three phosphor groups along the hori~ontal path. Th~ls, it is desirahle to maintain the ratio of the occurrence rate of the indexing stripes to the rate of the groups of three phosphor stripes a constant of a non-, integral numbe~ along all over the horizontal path.
Furtiler, the start signal generating stripe 2G of the same n)aterial of the indexing stripes is necessary at the position of the be~inlling of the sweep of the electron beam whicll is nenerated from the electron gun means 14. Altllough the beam is illustrated to sweep in the direction from le-ft -to right, the direction of sweep may be reversed.
If doing so, of course, the start signal nenerating stripe also must be formed at the reversed position.
As illustrated in Fig. 1~ the start sigllal generating stripe 26 is located at the far distant position From the left edge oF phosphor stripe screen. Further, it is required to have the sufficient vertical 2n length sucll as For the other indexing stripes.
~ .
~ v~t~3 Th~ pri~r ~rt is ilLustrate~ in ~lg. 3 which graphlc~lly shows th~
color phosphor strip~s 32 an~l tl,~ corr~spondingly positioned indexing ~tripes 30 having the same length in the vertical dlrection, keeping in mind that Fig. 3 only shows the upper halE of the screen an~ curves 30 and 32 sho~ hypothetical curves connecting the vertic~l edges o~ the indexing stripes and color pllospho-r stripes respectively.
~ccording to this invention tl-e beam indexing stripes 25 vertically extend beyond a hypothetical envelope cllrve 42 connecting the vertical edges of the color phospl~or stripes in a vertical direc-tion. Namely as shown in Fig. 2 the beam indexing stripes 25 are vertically longer than the respective pilospl~or stripes 21 22 23 of the three ~roups.
An emlodilllellt of the vertical lell~th relationship bet~leen the indexing stripes and the color pllospllor stripe is graphically shown in Fig. 4. In this figure the upper half of the screen is illustrated and the line 40 shows a hypothetical envelope curve connecting the vertical edges of the indexing stripes and tlle line ~2 indicates a hypothetical envelope curve connecting tl-e vertical edges of the color ~ -phosphor stripes.
2~ In this embodiment the phosphor stripes screen is formed as a barrel-shape which is determined by the inside configuration of the glass panel. On the contrary the indexing stripes have the same ver-tical length along the horizontal axis. For ~impli~ying tlle explanation in tllese Figures the indexing stripes are shown as a vertically straight line. But actually the applicable form o-F this invention is that the indexing stripes extend along the inside walls of tlle Flange por-tion 17 of the glass panel 11 D~
As is unclerstood from Fi~. 4 accordin~ to this invention the entire phospllor screen area can be useful as an effective screen ~ith a correct color synchroni~at-ion thus obtainin~ a maximum useful screell.
To obtain a target structure such as shown in Figs. 1 and 2 two kinds of mask pattern are used in a manufacturing process. At first three color phosphor stripes are formed on a glass panel by projecting the exposure light emanatetl frolll a light source throu~h the apertures of -the firs-t master pattern in l~hich tile apertures are 10 arranged at the occurrence rate of the three phnsr)llor qroups in a horizon~al direction. Then team indexing stripes are ~orllled by pro-jecting the li~ht from the sanle light source throllgi) the apertures of the second master pattern in which the apertures are arranged at the horizontal occurrence rate o-f the indexing stripes. The apertures 15 of the second master pattern are continuously longer than that of the first master pattern in a vertical direction.
By designing these master patterns as olle chooses~ variolls other configurations of the indexing stripes can be attached~ For example a hypothetical envelope curve ~0 of the indexil1g stripes having the 20 similar barrel shape as the phosphor stripes envelope curve can be considered~
~3~
In case the beam sweeps in the direction from left to right, in the right half of the screen, the indexing stripes envelope curve 40 can coincide with the pllosphor stripes envelope curve 42, if desired.
The horizontal width of a beam indexing stripe is not explained ~ in the embodiment of the invention. But as is well known, various widths are applicable according to necessity.
Claims (4)
1. A color cathode ray tube including an outwardly curved target structure and means for projecting an electron beam toward said target structure;
said target structure including a viewing screen having a periodic series of color groups of parallel light-emitting color phosphor stripes presenting a curved upper profile, and indexing means superposed on said phosphor stripes, said indexing means including a plurality of beam indexing stripes of radiation-emissive indexing material and spaces therebetween, said indexing stripes being at least equal in length to said color phosphor stripes at a center portion of said screen and being progressively greater in length than said color phosphor stripes toward edge portions of said screen to present a straight upper profile coincident with the path of an electron beam scan, whereby indexing signals will be received from all of said indexing stripes during each electron beam scan of the screen including scans in which only a fraction of said phosphor stripes are traversed by the beam so that correct color synchronization can be obtained for the entire area covered by said phosphor stripes.
said target structure including a viewing screen having a periodic series of color groups of parallel light-emitting color phosphor stripes presenting a curved upper profile, and indexing means superposed on said phosphor stripes, said indexing means including a plurality of beam indexing stripes of radiation-emissive indexing material and spaces therebetween, said indexing stripes being at least equal in length to said color phosphor stripes at a center portion of said screen and being progressively greater in length than said color phosphor stripes toward edge portions of said screen to present a straight upper profile coincident with the path of an electron beam scan, whereby indexing signals will be received from all of said indexing stripes during each electron beam scan of the screen including scans in which only a fraction of said phosphor stripes are traversed by the beam so that correct color synchronization can be obtained for the entire area covered by said phosphor stripes.
2. A color cathode ray tube defined in claim 1, wherein the effective screen area formed by said indexing stripes is larger than the useful screen area formed by said color phosphor stripes.
3. A color cathode ray tube defined in claim 1 or claim 2, wherein said indexing stripes extend over the edges of said color phosphor stripes so as to provide information regarding actual instantaneous position of the electron beam on the screen and a start signal generating stripe being vertically longer than the maximum length of said color phosphor stripes.
4. In a method of manufacturing a screen structure for use in a color cathode ray tube defined in claim 1, the improvement comprising the steps of:
forming color phosphor stripes by projecting the exposure light emanated from a light source through the apertures of a first master pattern, and forming indexing stripes by projecting the exposure light emanated from said light source through the apertures of a second master pattern, said apertures of said second master pattern being vertically longer than that of said first one.
forming color phosphor stripes by projecting the exposure light emanated from a light source through the apertures of a first master pattern, and forming indexing stripes by projecting the exposure light emanated from said light source through the apertures of a second master pattern, said apertures of said second master pattern being vertically longer than that of said first one.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP51085003A JPS6051773B2 (en) | 1976-07-19 | 1976-07-19 | Index method color cathode ray tube |
| JP85003 | 1976-07-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1103299A true CA1103299A (en) | 1981-06-16 |
Family
ID=13846505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA282,999A Expired CA1103299A (en) | 1976-07-19 | 1977-07-18 | Color cathode ray tube with beam indexing stripes |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS6051773B2 (en) |
| AU (1) | AU512080B2 (en) |
| CA (1) | CA1103299A (en) |
| DE (1) | DE2732424C3 (en) |
| FR (1) | FR2359504A1 (en) |
| GB (1) | GB1581279A (en) |
| IT (1) | IT1114894B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02142972U (en) * | 1989-05-08 | 1990-12-04 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2942145A (en) * | 1954-03-01 | 1960-06-21 | Jr George E Sleeper | Triggering means for color television tube |
| US3090888A (en) * | 1959-04-13 | 1963-05-21 | Sylvania Thorn Colour Television Laboratories Ltd | Cathode ray tube viewing screen for colour television |
| GB1047953A (en) * | 1962-07-26 | 1966-11-09 | David Marshall Goodman | Improved cathode ray tubes |
| GB1045463A (en) * | 1963-07-09 | 1966-10-12 | Rca Corp | Luminescent screens for colour cathode ray tubes |
| FR1528923A (en) * | 1967-05-05 | 1968-06-14 | Picture tube for color television |
-
1976
- 1976-07-19 JP JP51085003A patent/JPS6051773B2/en not_active Expired
-
1977
- 1977-07-11 GB GB2904877A patent/GB1581279A/en not_active Expired
- 1977-07-13 AU AU26996/77A patent/AU512080B2/en not_active Expired
- 1977-07-18 CA CA282,999A patent/CA1103299A/en not_active Expired
- 1977-07-18 IT IT2582377A patent/IT1114894B/en active
- 1977-07-18 DE DE19772732424 patent/DE2732424C3/en not_active Expired
- 1977-07-19 FR FR7722032A patent/FR2359504A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| IT1114894B (en) | 1986-01-27 |
| GB1581279A (en) | 1980-12-10 |
| FR2359504A1 (en) | 1978-02-17 |
| FR2359504B1 (en) | 1982-04-02 |
| JPS6051773B2 (en) | 1985-11-15 |
| DE2732424B2 (en) | 1980-08-14 |
| AU512080B2 (en) | 1980-09-25 |
| JPS5310963A (en) | 1978-01-31 |
| AU2699677A (en) | 1979-01-18 |
| DE2732424A1 (en) | 1978-01-26 |
| DE2732424C3 (en) | 1981-04-09 |
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