Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and information about some of the electronic, electrical and electrotechnical Obsolete technology relics that the Frank Sharp Private museum has accumulated over the years .
Premise: There are lots of vintage electrical and electronic items that have not survived well or even completely disappeared and forgotten.

Or are not being collected nowadays in proportion to their significance or prevalence in their heyday, this is bad and the main part of the death land. The heavy, ugly sarcophagus; models with few endearing qualities, devices that have some over-riding disadvantage to ownership such as heavy weight,toxicity or inflated value when dismantled, tend to be under-represented by all but the most comprehensive collections and museums. They get relegated to the bottom of the wants list, derided as 'more trouble than they are worth', or just forgotten entirely. As a result, I started to notice gaps in the current representation of the history of electronic and electrical technology to the interested member of the public.

Following this idea around a bit, convinced me that a collection of the peculiar alone could not hope to survive on its own merits, but a museum that gave equal display space to the popular and the unpopular, would bring things to the attention of the average person that he has previously passed by or been shielded from. It's a matter of culture. From this, the Obsolete Technology Tellye Web Museum concept developed and all my other things too. It's an open platform for all electrical Electronic TV technology to have its few, but NOT last, moments of fame in a working, hand-on environment. We'll never own Colossus or Faraday's first transformer, but I can show things that you can't see at the Science Museum, and let you play with things that the Smithsonian can't allow people to touch, because my remit is different.

There was a society once that was the polar opposite of our disposable, junk society. A whole nation was built on the idea of placing quality before quantity in all things. The goal was not “more and newer,” but “better and higher" .This attitude was reflected not only in the manufacturing of material goods, but also in the realms of art and architecture, as well as in the social fabric of everyday life. The goal was for each new cohort of children to stand on a higher level than the preceding cohort: they were to be healthier, stronger, more intelligent, and more vibrant in every way.

The society that prioritized human, social and material quality is a Winner. Truly, it is the high point of all Western civilization. Consequently, its defeat meant the defeat of civilization itself.

Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

OLD, but ORIGINAL, Well made, Funny, Not remotely controlled............. and not Made in CHINA.

How to use the site:
- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

Every CRT Television saved let revive knowledge, thoughts, moments of the past life which will never return again.........

Many contemporary "televisions" (more correctly named as displays) would not have this level of staying power, many would ware out or require major services within just five years or less and of course, there is that perennial bug bear of planned obsolescence where components are deliberately designed to fail and, or manufactured with limited edition specificities..... and without considering........picture......sound........quality........
..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

Have big FUN ! !
-----------------------
©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All sets and apparates appearing here are property of Engineer Frank Sharp. NOTHING HERE IS FOR SALE !
All posts are presented here for informative, historical and educative purposes as applicable within Fair Use.


Thursday, June 16, 2022

GRUNDIG P37-040A CHASSIS CUC5303 CRT TUBE ORION A34JLL90X23 R370BV1BK1A-TC23





 

CRT TUBE ORION  A34JLL90X23  R370BV1BK1A-TC23

 

Electron gun for a color picture tube
The present invention discloses an improved electron gun for a color picture tube including a main lens having a first rim electrode having a beam passing plane with holes in an incident side of the electron beam and a second rim electrode facing the first rim electrode and having a beam passing plane with holes in a departing side of the beam. A focusing electrode having a beam passing plane with holes in departing side of the beam for forming compensating astigmatism quadrupole lenses in conjunction with the first rim electrode to compensate for the astigmatism of the main lens is positioned adjacent to the first rim electrode of the main lens. Astigmatism formed between the first and second rim electrode of the main lens electrodes can be reduced by the compensating astigmatism of the quadrupole lenses.

 1. An electron gun for a color picture tube comprising:
a first rim electrode having a beam passing plane and an opposing rim end, said beam passing plane having three beam passing holes formed therein in an incident side of three electron beams for forming quadrupole lenses, a center hole of said three beam passing holes of said first rim electrode is circular in shape and wing holes of said three beam passing holes of said first rim electrode are outwardly deviated;
a second rim electrode having a second beam passing plane and a rim end, said second beam passing plane having three independent beam passing holes formed therein in a departing side of said beams, said second rim electrode positioned so that said rim of said second electrode faces said rim of said first electrode forming a common lens having astigmatism, said three independent beam passing holes of said second rim electrode are circular in shape, the diameter of the wing holes is larger than that of the center hole; and
a focusing electrode having a third beam passing plane in which three beam passing holes are formed in a departing side of said beams for forming quadrupole lenses, said departing side of said third beam plane positioned adjacent to said incident side of said first beam passing plane of said first electrode to form said quadrupole lenses, a center hole of said three beam passing holes of said focus electrode is transversely elongated in shape and wings holes are circular in shape.


Description:
FIELD OF THE INVENTION
The present invention relates to an electron gun for a color picture tube, and particularly to an in-line type gun with improved electrodes forming the main lens.

BACKGROUND OF THE INVENTION
A conventional electron gun for a color picture tube is mounted in the neck of the tube to emit thermions (i.e., electrons or ions). The electron gun comprises a triple electrode part having a cathode as a source of thermions, and a plurality of electrodes for forming an electrostatic lens by differences in potential.
In an in-line type electron gun, three electron beam passing holes are formed in line on two facing sides of two adjacent electrodes, and respectively prescribed voltages are applied to each electrode to form a plurality of equipotential lines, namely the electrostatic lens, thus focusing and accelerating the electron beam passing therethrough. The magnification of the electrostatic lens formed between two electrodes depends upon the size of the beam passing holes and the potential difference between voltages applied to each electrode. The spherical aberration is increased with increasing magnification.
Therefore, the magnification of the lens is conventionally reduced and the diameter of the lens is enlarged to reduce the spherical aberration of the electrostatic lens formed between electrodes.
In FIG. 1, (Prior Art) there is shown an example of a pair of electrodes of the main lens for reducing the spherical aberration.

The system comprises a pair of rim electrode components 11, 21 each having large aperture beam passing holes 11H, 21H, three beams concurrently passing therethrough; and plate electrode components 12, 22, placed independently in rim electrode components 11, 21 to be spaced by a prescribed distance from large aperture beam passing holes 11H, 21H, having three vertically elongated beam passing holes (12R, 12G, 12B), (22R, 22G, 22B), respectively. When prescribed voltages are applied to the electrodes, an electrostatic lens is formed between the two electrodes 10,20 and the lens comprises a large aperture lens formed between large aperture beam passing holes 11H, 21H of rim electrode components 11, 21 and small aperture lenses formed between each of small aperture beam passing holes (12R, 12G, 12B), (22R, 22G, 22B). The electron beam passing through the lens 11H, 21H suffers a converging force in which the vertical component is stronger than the horizontal component of the large aperture lens formed between rim electrode components 11, 21 of oval shape, resulting in a positive astigmatism.

The positive astigmatism is compensated by negative astigmatism by small aperture lenses formed between vertically elongated beam passing holes (12R, 12G, 12B), (22R, 22G, 22B) of plate electrode components 12, 22. In this manner, the astigmatism and the spherical aberration of the beam passing through the electrostatic lens formed between electrodes 10, 20 can be reduced.
However, plate electrode components 12, 22 for compensating the positive astigmatism of rim electrode components 11, 21, are placed at positions recessed a small distance from the edges 11H, 21H of rim electrodes, 11 21,

Moreover, as the small aperture lenses formed between the two side small aperture beam passing holes (12R, 12B), (22R, 22B) are asymmetrically formed by the effect of asymmetrical electric field due to side walls of rim electrode components 11, 21, the beam passing side holes (12R, 12B), (22R, 22B) suffers a large spherical aberration.
As the result, an asymmetrical halo occurs at the periphery of the beam spot landing on the screen, and the phenomenon deforms the beam spot into an asymmetrical transversely elongated shape when the beam is deflected into the peripheral portion of the screen by the deflection yoke.

SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide an electron gun for a color picture tube capable of reducing the overall spherical aberration and correcting the unsymmetric astigmatism generated by the side wall effect of the rim electrode thus obtaining a uniform section of the beam all over the screen.
To achieve the above object, an electron gun according to the present invention includes a first rim electrode of tubular section having a beam passing plane with three beam passing holes on the incident side of the beam for forming a quadrupole lens and a second rim electrode of tubular section adjacent to the first rim electrode, having a beam passing plane with three beam passing holes on the departing side of the beam.
According to one aspect of the present invention, each of the first and second electrodes respectively comprises a tubular main body having upper and lower walls elongated in parallel and two side walls connecting each end of the upper and lower walls, and a beam passing plane closing one end of the main body and having beam passing holes.

BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects and advantages of the present invention will be more apparent from the following detailed description, with reference to the accompanying drawings, in which:
FIG. 1 (Prior Art) is a sectional view in the horizontal plane illustrating electrodes for forming a large aperture lens in a conventional electron gun for a color picture tube;
FIG. 2 is a perspective view showing rim electrodes constituting the main lens of an electron gun according to the present invention; and
FIG. 3 is a partially sectional view in the horizontal plane of electrodes of FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION
An electron gun for a color picture tube according to one embodiment of the present invention comprises a first rim electrode 30 and a second rim electrode 40 facing each other as electrodes for forming the main lens as shown in FIG. 2. Each of the first and second rim electrodes 30, 40 respectively having upper and lower walls (31a, 31b), (41a, 41b) elongated in parallel, a tubular main body 31, 41 having side walls 31c, 41c extending between either ends of the upper and lower walls (31a, 31b), (41a, 41b), and a beam passing plane 32, 42 having beam passing holes and closing the entrance end of the tubular main body 31, and a beam passing plane 42 having beam passing holes and closing the exit end of tubular electrode 41. The beam passing plane 32 of the first rim electrode 30 is placed toward the cathode side (not shown) of the gun to form a quadrupole lens with the focusing electrode 50 of the prefocusing lens part. The beam passing plane 42 in the departing side of the second rim electrode 40 is placed opposite to the cathode. Three beam passing holes are formed at the beam passing plane 32 of the incident side of the first rim electrode 30, the central hole 30G thereof has a circular shape, and two wing holes 30R, 30B are of a transversely elongated shape to form quadrupole lenses with electrode 50 for each beam passing hole. Centers of the two transversely elongated wing holes 30R, 30B are outwardly deviated relative to those of the facing holes of the adjacent electrode 50.
Three beam passing holes 40R, 40G, 40B formed at the beam passing plane 42 in the departing side of the second rim electrode 40, are circular in shape, the diameters of wing holes 40R, 40B being larger than that of central hole 40G.

The operation of the gun according to the present invention will now be described.
When respectively prescribed voltages are applied to the first and second rim electrodes 30, 40 and the focusing electrode 50 FIG. 3), a large aperture electrostatic lens is formed between the first and second electrodes 30, 40, and a quadrupole lens is formed between the focusing electrode 50 and the first rim electrode 30. As main bodies 31, 41 of the first and second rim electrodes 30, 40 are oval-tube in shape, the large aperture lens formed therebetween attains a positive astigmatism in which the vertical component of the beam is over-focused compared to the horizontal component. As for the quadrupole lens formed between the focusing electrode 50 and the first rim electrode 30, the horizontal converging force is relatively enhanced to attain a negative astigmatism, as beam passing holes thereof are of a transversely elongated shape. Thus the main lens astigmatism is compensated by the two astigmatisms being offset. As will be understood, in order to achieve the negative astigmatism quadrupole lenses formed in conjunction with the two elongated wing holes 30B, 30R and circular center hole 30G of first rim electrode 30, the beam passing holes of focusing electrode 50 will comprise a vertically elongated central hole and two circular or elongated wing holes (circular wing holes are shown in FIG. 2).

Moreover, as the center of wing holes 30R, 30B of the beam passing plane 32 in the incident side of the first rim electrode 30 is outwardly deviated, and the diameter of wing holes 40R, 40B is larger than that of the central hole 40G of the beam passing plane 42 in the departing side of the second rim electrode 40, the asymmetrical electric field effect due to the side walls of the rim electrodes can be reduced and the side beams can be deflected toward the central beam for convergence.
Central holes 30G, 40G formed in beam passing planes 32, 42 of the first and second rim electrodes 30, 40 are circular in shape, thus allowing to improve the support of electrodes during the assembly of the gun to facilitate the precision of the assembly.

According to the present invention, the positive astigmatism of the electrostatic lens formed by rim electrodes of the main lens is offset by the negative astigmatism of the quadrupole lens of the prefocusing lens part formed by elongated aperatures,thereby reducing the astigmatism of the main lens. Thus the present invention reduces the spherical aberration due to the asymmetry of the main lens and prevents the deterioration of focusing characteristics.
 (Orion Electric Co. (Kyungsangbok-do, KR))

Other References:
Patent Abstracts of Japan, vol. 15, No. 108 (E-1045), Mar. 14, 1991, Patent Publication No. JP-A-03 001 429, Jan. 8, 1991.

Patent Abstracts of Japan, vol. 17, No. 549 (E-1443), Oct. 4, 1993, Patent Publication No. JP-A-05 159 719, Jun. 25, 1993.




Orion Electric Co., Ltd. ( Orion Denki Kabushiki-gaisha) is a Japanese consumer electronics company, and it was established in 1958 at Osaka, Japan. It is based in the city of Echizen, Fukui Prefecture, Japan. Original products manufactured were transistor radios, radio cassette recorders, car stereos, and music centers. One of the world's largest OEM television and video manufacturers that mostly supply to major-brand OEM customers today, Orion produces six million televisions and twelve million DVD players and TV combo units each year. Most products are usually manufactured in the factories of Thailand.
The Orion Group employs in excess of 9,000 workers. It has factories and offices on four continents, including Japan, Thailand, Poland, United Kingdom, and United States. Over the years, Orion has established and expanded its manufacturing facilities to develop and produce large and small screen color TVs (CRT, LCD, Plasma), TV combos, and DVD player/combos for the U.S., European, and Australian markets. Orion's flagship factories in Thailand are proud of their achievement as being one of the top exporters in this country, and they have been recognized with an award from the Thai Government for their contribution.
Orion manufactures products for eleven of the world's top electronic brands worldwide. Its primary, previous, long-time brands were produced within Broksonic, Memorex, Otake, Orion, and Sansui. For the North American market, Orion used to manufacture many televisions and VCRs for Emerson Radio during the 80s and 90s for 10 years, but Emerson Radio went bankrupt, and it was brought up by Funai in 2000, which Funai still owns today. During the 1990s, Orion was the exclusive supplier for Wal-Mart of discounted televisions, combos, and VHS VCRs under Orion and World brand names. In 2001, Orion teamed up with Toshiba for manufacturing smaller CRT/LCD televisions and DVD/VCR combos for the North American market for eight years until 2009. In 2011, Orion purchased the JVC trademark for branding, since JVC has decided to exit the electronics business, and all JVC televisions are now designed, produced, and supported by Orion from now on. Currently as of right now, Orion manufactures LCD/LED televisions and combo TVs for Hitachi, JVC, Sanyo, and Sharp, based on each company's OEM orders. Most units are being sold at Wal-Mart and Sam's Club stores. Orion also operates Orion Sales, headquartered in Olney, Illinois, for the North American market, under its private-owned Sansui brand and, recently purchased, JVC brand.

1958 Otake Bo-eki K.K.(Otake Trading Co., LTD.) established in Kobe, Japan.
Orion Denki K.K.(Orion Electric Co., LTD.) established in Osaka, Japan.
1967 Orion Denki(Fukui) K.K. established in Fukui, Japan.
1970 Orion Denki(Kaga) K.K. established in Ishikawa, Japan.
1971 Company headquarter office relocated from Osaka to Fukui and was named as Orion Electric Co., LTD.
1984 Orion Electric Co., LTD. acquired Orion Denki(Fukui) K.K. and was renamed Orion Denki K.K.
1986 Orion Electric(U.K.)LTD. established in Wales, United Kingdom.
1987 Orion America, LTD. established in Indiana, United States of America.
1988 World Electric (Thailand) Co., LTD. established in Chonburi, Thailand.
1995 Korat Denki LTD. established in Nakhonratchasima, Thailand.
1998 Orion Denki K.K. acquired Otake Bo-eki K.K.
2001 Korat Denki LTD. Factory 2 launched in Nakhonratchasima, Thailand.
2006 Orion Electric(Poland)sp.zo.o launched in Lysomice, Poland.



No comments:

Post a Comment

The most important thing to remember about the Comment Rules is this:
The determination of whether any comment is in compliance is at the sole discretion of this blog’s owner.

Comments on this blog may be blocked or deleted at any time.
Fair people are getting fair reply. Spam and useless crap and filthy comments / scrapers / observations goes all directly to My Private HELL without even appearing in public !!!

The fact that a comment is permitted in no way constitutes an endorsement of any view expressed, fact alleged, or link provided in that comment by the administrator of this site.
This means that there may be a delay between the submission and the eventual appearance of your comment.

Requiring blog comments to obey well-defined rules does not infringe on the free speech of commenters.

Resisting the tide of post-modernity may be difficult, but I will attempt it anyway.

Your choice.........Live or DIE.
That indeed is where your liberty lies.

Note: Only a member of this blog may post a comment.