Milestone-Proposal talk:Sharp 14-inch thin-film-transistor liquid-crystal display (TFT-LCD) for TV, which has ushered in TFT LCD industry
|Thread title||Replies||Last modified|
|my findings||4||16:12, 14 August 2013|
|Emergence of TFT-LCD Display Technology||6||13:31, 14 August 2013|
|commnets to the 14-inch LCD, docket 2013-04||1||23:20, 11 August 2013|
1. The proposer must be aware of the existing IEEE Milestone for Liquid Crystal Display (RCA) 1968 Princeton, NJ, U.S.A., dedicated on 30 September 2006. This proposal just doesn't look right: it duplicates, overlaps with, and spoils it for the IEEE Milestone already awarded for work by RCA.
Somewhere in the Wall Street Journal, I read that George Heilmeier gave credit to Sharp's great works by saying “I think you need to give the credit to the people who persevered and worked on LCDs for 25 years. I don’t spend too much time wringing my hands about it, but I have a lot of satisfaction knowing we had the same vision in the 1960s.” George Harry Heilmeier is an American engineer, a pioneering contributor to displays and is credited with the of LC-Display. Now George may not be able to spend time on this, but this proposer and members of the IEEE History Committee have work to do, trying to mesh these great work together.
2. Plaque Location: No IEEE plaque should be mounted in a private collection or in a company museum behind closed doors that requires the public to make an appointment. Mount the plaque outdoors or in the lobby.
3. The writeup says that Sharp has 'milestones' in their company collection and that the world’s first mini calculator resides somewhere at the British Science Museum in London. All this corporate advertising should be removed from GHN records.
1. Thank you for pointing out shortfalls of my proposal for Milestones; I had thought by myself I fully understood and congratulated RCA team led by G.. Heilmeier for being awarded Milestones: Display(LCD), 1968, as I was one of 13 members of project team S-734 Tenri LCD group at SHARP Corporation, which mass-produced LCD, 1st in the world in 1973, mounted on C-MOS minicalculator, whose operation mode was Dynamic Scattering Mode(DSM), among various LCD operation modes developed afterward, Heilmeier and his team worked on and proposed in 1968, though.
I all the more admire and respect RCA team to have come to know about its pioneering efforts and work after I read History Crystallized: A First-Person Account of the Development of Matrix-Addressed LCDs for television at RCA in the 1960s by Bernard J. Lechner: Information Display 1108 27.
Sharp 14-inch thin-film-transistor LCD (TFT-LCD) for Milestone proposal was press-released 1988: 15 years after LCD was mass-produced 1st in the world.
In those 15 years, LCD had established itself as the essential part of a series of new products: C-MOS minicalculators, LCD wrist watches and clocks, Nintendo games, , portable measuring equipment, personal information devices, word processors, lap-top and note PCs to name a few, excluding TVs.
These products had not been put on the market without LCD to meet the people's needs in accordance with the change of their life and working styles based on key words: mobile/portable and large information content, and LCD and those products were a common knowledge of all the people in the street, young and old, men and women, in 1988, I thought.
So, my shortfalls may be:
First, I thought LCD in 1988 was so common a knowledge of ordinary people, and there was no need anymore to be explained referring to the great achievements by RCA team.
Second, I did not explain TFT-LCD; which is an active matrix LCD driven by TFTs provided to every display dot to achieve larger contrast ratio and smaller response times, independent of LCD's threshold properties, and is different from conventional passive matrix LCDs.
Any modification on my original proposal would be very much appreciated to make my original proposal better understandable paying due respect to RCA team.
2. Plaque Location: I think Sharp museum is quite open to the general public, and Plaque would be better kept and well protected than kept elsewhere.
3. I would like just to give the information for better understanding of the milestone proposal, and corporate advertizing is not my intention at all.
Any modifications to this effect would be all welcome.
There is an extensive and excellent paper by Prof. Hirohisa Kawamoto on the "History of Liquid Crystal Displays" (Proc. of the IEEE, april 2002) that details the process from its initial steps at RCA, through many years of research and development of products by many people in different places, employing different technologies, and culminating with Sharp's manufacturing of the 14" display used for television.
It has already been pointed out that there is another IEEE Milestone approved for the Liquid Crystal Displays; the interrelations between them are not quite clear to me; we should be sure there are two different facts worthy of two different milestones.
I agree 100% with Juancarlos-san saying "we should be sure there are two different facts worthy of two different milestones."
1st. Essential key words of my proposal entitled "Sharp 14-inch thin-film-transistor display (TFT-LCD) for TV , which has ushered in TFT-LCD industry" are:
3. liquid crystal display(LCD)
"another IEEE Milestone approved for the Liquid Crystal Displays, 1968" is only for LCD: neither 14-inch LCD, nor 14-inch TFT for TV were feasible in 1968,
as is quoted below: (http://www.ieeeghn.org/wiki/index.php/Milestones:Liquid_Crystal_Display,_1968)
"Liquid Crystal Display, 1968 Princeton, NJ, U.S.A., Dedicated 30 September 2006 -- IEEE Princeton and Central New Jersey Section
Between 1964 and 1968, at the RCA David Sarnoff Research Center in Princeton, New Jersey, a team of engineers and scientists led by George . Heilmeier with Louis A. Zanoni and Lucian A. Barton, devised a method for electronic control of light reflected from liquid crystals and demonstrated the first liquid crystal display. Their work launched a global industry that now produces millions of LCDs annually watches, calculators, flat-panel displays in televisions, computers and instruments."
2nd. Below is a quote from "B.J. Lechner: History Crystallized_A First-Person Account of the Development of Matrix-Addressed LCDs_for television at RCA in the 1960s; Information Display 1/08 p26-30":
"During 1969, RCA abandoned entirely the objective of making a liquid crystal TV display: By 1969, RCA's color-TV- receiver business was matured and the smallest consumer product of significance was a 13-in. color set. Because we could not promise to compete with such a product in any foreseeable time frame, management had no interest in investing further."
In 1969, RCA abandoned LC TV because 13-inch, minimum size for TV, color LCD did not seem to be possible in the foreseeable future; in 1987, Sharp adopted 14-inch to demonstrate TFT-LCD could be used for TV.
In 1975, Sharp started research and development work on TFT for small-size LCD to be used in personal information devices to achieve larger contrast ratio, smaller response times, larger scanning line numbers for LCD.
18 years between RCA 1969 and Sharp 1987 was required for LCD and TFT to be developed good enough for LCD and TFT , integrated together, to be 14-inch TFT-LCD for TV.
Whithout TFT, LCD could not have been used in TV application which needs larger contrast ratio, smaller response times, larger scanning line numbers and full-color rendition.
Anwering Juan Carlos's question, though RCA invented the LCD, they caould not develop a display that can be used for television and thus gave up the project in 1970, as wriiten by Bernie Lchner of RCA in the Reference. In 1988, Sharp firstly developed 14" full-color full-motion display that can be used for television. This was a very siginificant progress of technology, which caused to launch portable PC and flat TV industries.
Emergence of TFT-LCD Display Technology
I am convinced that this proposed IEEE Milestone is appropriate recognition of the emergent TFT-LCD Display Technology 25 years ago. It addressed the need for large flat screen displays and the need to move away from CRT displays for ecological reasons as well as display quality reasons. However, I feel the proposal would benefit greatly from editing to improve the representation of the technology to both reasonably informed engineers and technologists and the general public which might enjoy museum like exposure to this technology that has had an almost certainly positive impact in their lives.
I too feel editing is needed: What does TFT mean? The writing is very much overdone with too much editorializing- "breathtaking", "vacillating companies" "major-league status" don't belong in the citation. The comments above on the RCA work have to be addressed as well.
Answering Mischa Schwartz’s question, TFT is an acronym of thin-film-transistor. As far back as 1968, Bernie Lechner of RCA first proposed to use TFTs in matrix array of liquid-crystal cells (later termed “Active Matrix ” by Peter Brody), but technologies to realize his concept did not exist at that time. There have been a long list of developments assisted for instance by the inventions of TN(twisted nematic) mode of operation and hydrogen-added amorphous silicon. Finally in 1988 Sharp achieved a 14” full-color full-motion display that can be used for television application.
Hiro Kawamoto, advocate
Thank you for the two suggestions for improvement in presentation, including suppressing "too much editorializing" which simply came from the display quality of the 14 TFT-LCD being far better than I had personally expected before and got emotional somewhat too much.
I appreciate kind suggestions and will add technical reference to give some quality specification numbers.
Thank you again.
I too agree that the citation needs to be modified as was suggested, and the issue with the RCA's Milestone and George Heilmaier's fundamental contributions need to be reconciled. The apparent non-public access location of the plaque should also me addressed.
Thank you for your suggestion to modify the citation
I have modified the citation, referring to RCA LCD group's beautiful pioneering work, and added a reference:B.J.Lechner, "History Crystallized_A First-Person Account of the Development of Matrix-Addressed LCDs for television at RCA in the 1960s",Information Display 1/08 p26-27
I tried to pay due respect to RCA LCD group I admire the most: their LCD research work on TV finished in 1969, according to Lechner's account, when I was still in the university, and I joined SHARP CRL in 1971 and started research on LCD for mini-calculator; on TFT-LCD for TV in 1984.
This is HISTORY.
Any modification and suggestion for improvement would be very much appreciated as I still have difficulties in English language as my second language.
commnets to the 14-inch LCD, docket 2013-04
As the Advocate, I would like to add a few comments to the Proposal.
The achievement of 14” TV-type LCD in 1988 revolutionized the LCD industry. Before, the industry, made of small number of participants such as Sharp and Seiko, had been serving pocket-calculator and word-processor industry supplying only small-size displays. Now recognizing that LCD would be able to supply large-size full-color full-motion displays to TV and PC industries and would soon replace CRT, giant companies such as IBM, Toshiba, Hitachi, and Panasonic joined the band wagon hence the LCD industry as we see today was established. .
Because of this accomplishment, the development received two awards:
1. The 1990 Edward Rhein Foundation Award The developed monitor is displayed in the DEUTSCHES MUSEUM in Munich, Germany. The panel on the side reads, “LL-1402 Liquid Crystal Colour TV Receiver The image on the 14-inch screen is produced by twisted liquid crystals, controlled by an active matrix. Each of the 640 pixels per scan line is made up of three coloured dots (red, green, and blue). The Edward Rhein Foundation awarded its 1990 technology prize to Sharp for this colour monitor.”
2. The 1992 IEEE Masaru Ibuka Consumer Electronics Award Citation, "For demonstrating technical feasibility of large size color LCD displays suitable for consumer TV applications."
Going through the Milestone’s discussions, it looks like that Advocate is required to express his or her opinion to support the Proposal or not. I have thought the English word “Advocate” already means the person who supports.
Any case, I would like to mention I am fully supportive of the Proposal of the 14” liquid-crystal display.
Hirohsa Kawamoto, Advocate