Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 
D1023319
416 posts

Ultimate Geek


  #453779 31-Mar-2011 12:21
Send private message


Out of interest another type of display is the SED.
Its like a CRT but SED consists of a matrix of tiny cathode ray tubes, each "tube" forming a single sub-pixel on the screen.

Pity it didnt go anywhere due to low cost of LCD - Plasma's that were mature products.

http://en.wikipedia.org/wiki/Surface-conduction_electron-emitter_display


A surface-conduction electron-emitter display (SED) is a flat panel color television technology currently being developed by a number of companies. SEDs use nanoscopic-scale electron emitters to energize colored phosphors and produce an image. In a general sense, a SED consists of a matrix of tiny cathode ray tubes, each "tube" forming a single sub-pixel on the screen, grouped in threes to form red-green-blue (RGB) pixels. SEDs combine the advantages of CRTs, namely their high contrast ratios, wide viewing angles and very fast response times, with the packaging advantages of LCD and other flat panel displays. They also use much less power than an LCD television of the same size.


Oubadah

676 posts

Ultimate Geek


  #453830 31-Mar-2011 14:56
Send private message

Yeah, I remember SED/FED. I was 'looking forward' to it for years :(


 
 
 
 


robjg63
3166 posts

Uber Geek


  #453860 31-Mar-2011 16:43
Send private message

There was also a laser display system that was going to take off a few years ago. I think it may have been developed in Aussie. Though I just googled now and found this:
http://proavmagazine.com/pro-av-articles/new-laser-display-technology-targets-pros.aspx

I think it was sort of like a CRT phosphor layer with a laser exciting the pixels - so I think thats what the link above describes.
Was going to be about as cheap as CRT but with true/large flat panel ability.

There are so many technologies - its not always the best that make it to market either...




Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler


blakamin
4431 posts

Uber Geek
Inactive user


  #453892 31-Mar-2011 18:20
Send private message

I love my Samsung SyncMaster 1100p+
21ins of brilliance!

sorry to be OT

Oubadah

676 posts

Ultimate Geek


  #453893 31-Mar-2011 18:25
Send private message

robjg63: 
There are so many technologies - its not always the best that make it to market either...


There's truth in that.

LCD is cheaper to manufacture than CRT, but that doesn't stop them from charging us the same. Costs - that's the only explanation I can think of as to why they've been milking the LCD cow for so long.

They know they can keep coming up with these trivial 'improvements' just often enough to keep the mindless masses occupied, convince them that technology is advancing. As mentioned by someone on the last page, they even have the audacity to remove 120 vertical lines from what was a practical, convenient resolution, and then market the s**t out of it like they've done us all a great favor. 

Most of the hapless sods who think LCD is so marvelous can't remember what a half decent monitor looks like. They bought their new LCD display, compared it to a worn out, most likely cheap Shadow Mask CRT, and drew their conclusions.

Niel
3267 posts

Uber Geek

Trusted

  #453968 31-Mar-2011 22:07
Send private message

My previous display was a 19" CRT with BNC connectors. For about 4 years I've used a 19" 3:4 LCD I was given for free. Wife wants to "upgrade", I'm keen to hold out for something like a 27" or 30" 2560*1600 LCD when they eventually become affordable. Currently they start at $2k.

Back to the original topic, you can still get CRTs but very limited choice. Hope this link works, else search for CRT: http://pricespy.co.nz/category.php?k=394




You can never have enough Volvos!


gzt

gzt
11681 posts

Uber Geek

Lifetime subscriber

  #453992 31-Mar-2011 23:42
Send private message

There are one or two new Triniton tubes available on eBay. Not exactly cheap.


 
 
 
 


richms
23683 posts

Uber Geek

Trusted
Subscriber

  #454204 1-Apr-2011 13:55
Send private message

The biggest problem I have with LCDs is the low resolution for the size. If I go to a 22", I would want it to be more than 1200px high, that would be about right for a 19"

Used to use a lappy with 1920x1200 in a 17" - that was great. No visible pixel structure, plenty of room for everything. Cant even find that anymore on a lappy that size.

That is about the right PPI for a display read at 750mm away or so. The low res of desktop LCDs means that any closer than a meter and its like looking thru a screendoor. Not interested in hearing "its fine for me" comments from those of you with only 20/20 or worse vision.




Richard rich.ms

RexHavoc
94 posts

Master Geek


  #454321 1-Apr-2011 19:07
Send private message

I have a Black IBM 21" Trinitron here that's looking for a new home. PM me if you want to make me an offer. Pick-ups only. In Paraparaumu.
 

Oubadah

676 posts

Ultimate Geek


  #454332 1-Apr-2011 19:39
Send private message

richms: The biggest problem I have with LCDs is the low resolution for the size. If I go to a 22", I would want it to be more than 1200px high, that would be about right for a 19"  

That is about the right PPI for a display read at 750mm away or so. The low res of desktop LCDs means that any closer than a meter and its like looking thru a screendoor.


I couldn't agree more, and that was definitely something I observed in the LP2475w. What's more, when you have such a heavy pixel pitch you get a faux 'bad convergence' effect (ie. similar to what happens on a CRT when the convergence is out). For example, a vertical line rendered on the screen will have a noticeable red tint on one side.

IIRC both Dell and Samsung made monitors with 23" 2048 x 1152 LCD panels (that was approx 0.24mm which was the pitch of your average CRT) bhat that is of course in 16:9 AR, and aside from the high res, I don't think they had anything else going for them.

RexHavoc: I have a Black IBM 21" Trinitron here that's looking for a new home. PM me if you want to make me an offer. Pick-ups only. In Paraparaumu. 
 

I may well have been interested if not for the distance (I'm in Auckland). 

Niel
3267 posts

Uber Geek

Trusted

  #454557 2-Apr-2011 17:32
Send private message

richms: Not interested in hearing "its fine for me" comments from those of you with only 20/20 or worse vision.


I'm 38 and my eyes are tested every year for H&S.  A few years ago I've also paid for a full/proper eye test.  My vision is perfect, I can read the smallest line on the eye test chart even with the second eye struggling to adjust after being covered.  The Samsung 24" I use at work is fine for me, both for CAD and for text (I'm an electronic engineer).

What makes a big difference is if you get a good quality VGA cable instead of the cheap ones normally supplied, and what makes a huge difference is if you use DVI.  A good quality video card also makes a big difference.




You can never have enough Volvos!


1 | 2 
View this topic in a long page with up to 500 replies per page Create new topic





News »

Vodafone enables 5G roaming - for when international travel comes
Posted 30-Oct-2020 15:03


Spark awards funding to Kiwi businesses in 5G funding initiative
Posted 30-Oct-2020 14:58


Huawei launches IdeaHub Pro in New Zealand
Posted 27-Oct-2020 16:41


Southland-based IT specialist providing virtual services worldwide
Posted 27-Oct-2020 15:55


NASA discovers water on sunlit surface of Moon
Posted 27-Oct-2020 08:30


Huawei introduces new features to Petal Search, Maps and Docs
Posted 26-Oct-2020 18:05


Nokia selected by NASA to build first ever cellular network on the Moon
Posted 21-Oct-2020 08:34


Nanoleaf enhances lighting line with launch of Triangles and Mini Triangles
Posted 17-Oct-2020 20:18


Synology unveils DS16211+
Posted 17-Oct-2020 20:12


Ingram Micro introduces FootfallCam to New Zealand channel
Posted 17-Oct-2020 20:06


Dropbox adopts Virtual First working policy
Posted 17-Oct-2020 19:47


OPPO announces Reno4 Series 5G line-up in NZ
Posted 16-Oct-2020 08:52


Microsoft Highway to a Hundred expands to Asia Pacific
Posted 14-Oct-2020 09:34


Spark turns on 5G in Auckland
Posted 14-Oct-2020 09:29


AMD Launches AMD Ryzen 5000 Series Desktop Processors
Posted 9-Oct-2020 10:13









Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.