A round shaped LCD screen
Electronics Forum Index Electronics
Circuits, theory, electrons and discussions.
 
 FAQFAQ   MemberlistMemberlist     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 
Google
 
Web ElectronicsHelp.net
A round shaped LCD screen
Goto page Previous  1, 2
 
Post new topic   Reply to topic    Electronics Forum Index -> Equipment
Author Message
Michael A. Terrell
Guest
Posted: Thu Apr 21, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
JW wrote:
Quote:

sheepish grin

D'oh! I've been trolled by a website.


There used to be round monitors in the early days of TV.

--
Former professional electron wrangler.

Michael A. Terrell
Central Florida

Back to top
John Woodgate
Guest
Posted: Thu Apr 21, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
I read in sci.electronics.design that Michael A. Terrell
<mike.terrell@earthlink.net> wrote (in
<4266B3A0.1A721DEA@earthlink.net>) about 'A round shaped LCD screen', on
Wed, 20 Apr 2005:

Quote:
There used to be round monitors in the early days of TV.

English Electric 16 inch round tubes, with metal flares, all at 16 kV or
so! They even put some in up-market receivers.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
Back to top
Scott Moore
Guest
Posted: Thu Apr 21, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
Kryten wrote:
Quote:
"JW" <none@dev.nul> wrote in message
news:9k9c61hjv1vqg31hipnlj2bcef3fveevi5@4ax.com...


http://www.geeks.com/details.asp?invtid=ROUNDLCD


:-)

I though perhaps the OP was thinking of an LCD with polar co-ordinates.

For something like a sonar scanner for boats.

Interesting technical challenge...



Actually, 3" round LCDs would be a great innovation.

Aircraft instruments are 3" round, and it is impossible to
find them to make compatible instruments that fit in those holes.
The ones that are available usually are square, and require the
panel be modified.

Back to top
Kryten
Guest
Posted: Thu Apr 21, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
"JW" <none@dev.nul> wrote in message
news:9k9c61hjv1vqg31hipnlj2bcef3fveevi5@4ax.com...

Quote:
http://www.geeks.com/details.asp?invtid=ROUNDLCD

:-)

I though perhaps the OP was thinking of an LCD with polar co-ordinates.

For something like a sonar scanner for boats.

Interesting technical challenge...
Back to top
Pooh Bear
Guest
Posted: Thu Apr 21, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
Meindert Sprang wrote:

Quote:
"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:42651D07.4A363B04@hotmail.com...


taku wrote:

Hi
I was wondering if anyone knew if and where i could get round lcd
screens manufactured or possibly the price range if i could get
someone to manufacture it for me. I've been doing some research and
all the manufacturers seem to only build rectangular ones, but yet
i've seen at certain shows / awards that they sometimes use lcd/plasma
screens that are of a strange shape. I am looking for screens with a
radius of 15 inches.
Thanx

They're made rectangular (a) to make efficient use of the expensive
optically flat glass (b) 'cos glass doesn't break into circles.

Glass breaks perfectly into circles. How do you think portholes are made?

What shape are the bits left over ?

That's important to LCD manufacture. See (a).


Graham
Back to top
Joel Kolstad
Guest
Posted: Thu Apr 21, 2005 5:52 am    Post subject: Re: A round shaped LCD screen Reply with quote
Quote:
"Michael A. Terrell" wrote:
There used to be round monitors in the early days of TV.

....and the early days of oscilloscopes!
Back to top
Pooh Bear
Guest
Posted: Thu Apr 21, 2005 7:37 am    Post subject: Re: A round shaped LCD screen Reply with quote
Scott Moore wrote:

Quote:
Kryten wrote:
"JW" <none@dev.nul> wrote in message
news:9k9c61hjv1vqg31hipnlj2bcef3fveevi5@4ax.com...


http://www.geeks.com/details.asp?invtid=ROUNDLCD


:-)

I though perhaps the OP was thinking of an LCD with polar co-ordinates.

For something like a sonar scanner for boats.

Interesting technical challenge...


Actually, 3" round LCDs would be a great innovation.

Aircraft instruments are 3" round, and it is impossible to
find them to make compatible instruments that fit in those holes.
The ones that are available usually are square, and require the
panel be modified.

I expect the aircraft market could bear the cost too.


Graham
Back to top
Pooh Bear
Guest
Posted: Thu Apr 21, 2005 7:38 am    Post subject: Re: A round shaped LCD screen Reply with quote
Joel Kolstad wrote:

Quote:
"Michael A. Terrell" wrote:
There used to be round monitors in the early days of TV.

...and the early days of oscilloscopes!

Hmmmmm - I feel a post to abse coming on !

Graham
Back to top
John Harlow
Guest
Posted: Thu Apr 21, 2005 8:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
Quote:
Aircraft instruments are 3" round, and it is impossible to
find them to make compatible instruments that fit in those holes.
The ones that are available usually are square, and require the
panel be modified.

I expect the aircraft market could bear the cost too.

Oh yeah, the aviation market is booming.

Not.
Back to top
Peter
Guest
Posted: Thu Apr 21, 2005 3:50 pm    Post subject: Re: A round shaped LCD screen Reply with quote
"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:4266E165.FCA251C@hotmail.com...
Quote:


Meindert Sprang wrote:

"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> wrote in message
news:42651D07.4A363B04@hotmail.com...


taku wrote:

Hi
I was wondering if anyone knew if and where i could get round lcd
screens manufactured or possibly the price range if i could get
someone to manufacture it for me. I've been doing some research and
all the manufacturers seem to only build rectangular ones, but yet
i've seen at certain shows / awards that they sometimes use
lcd/plasma
screens that are of a strange shape. I am looking for screens with a
radius of 15 inches.
Thanx

They're made rectangular (a) to make efficient use of the expensive
optically flat glass (b) 'cos glass doesn't break into circles.

Glass breaks perfectly into circles. How do you think portholes are made?

What shape are the bits left over ?

That's important to LCD manufacture. See (a).

Still doesn't explain b)
There are lots of examples of circular glass around me, flashlight lens,
vanity mirror, telescope, old radio bezel, spirit level. Rectangular LCDs
are much more convenient and efficient to make and connect.
I know some guys on another newsgroup who might like a small circular LCD to
replace a 6E5 but I suspect it will take a few more years to become cost
effective.

Peter
Back to top
Spehro Pefhany
Guest
Posted: Thu Apr 21, 2005 4:35 pm    Post subject: Re: A round shaped LCD screen Reply with quote
On Thu, 21 Apr 2005 11:50:16 +0100, the renowned "Peter"
<moocowmoo@newprovidence.demon.co.uk> wrote:

Quote:
There are lots of examples of circular glass around me, flashlight lens,
vanity mirror, telescope, old radio bezel, spirit level. Rectangular LCDs
are much more convenient and efficient to make and connect.
I know some guys on another newsgroup who might like a small circular LCD to
replace a 6E5 but I suspect it will take a few more years to become cost
effective.

Peter

It's fairly common to break the corners off a monochrome LCD to allow
it to fit within a circular or elliptical outline. Cheaper than a true
circular outline.


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
Back to top
Rich Grise
Guest
Posted: Thu Apr 21, 2005 4:35 pm    Post subject: Re: A round shaped LCD screen Reply with quote
On Thu, 21 Apr 2005 03:37:42 +0100, Pooh Bear wrote:
Quote:
Scott Moore wrote:
Kryten wrote:
"JW" <none@dev.nul> wrote in message
http://www.geeks.com/details.asp?invtid=ROUNDLCD
:-)
I though perhaps the OP was thinking of an LCD with polar co-ordinates.
For something like a sonar scanner for boats.
Interesting technical challenge...
Actually, 3" round LCDs would be a great innovation.
Aircraft instruments are 3" round, and it is impossible to
find them to make compatible instruments that fit in those holes.
The ones that are available usually are square, and require the
panel be modified.

I expect the aircraft market could bear the cost too.

Apparently, nobody's paying attention to the little datum that they go
in square holes. It's not that hard to draw round things on a rectangular
screen, you know.

Cheers!
Rich
Back to top
Eric Smith
Guest
Posted: Fri Apr 22, 2005 12:17 am    Post subject: Re: A round shaped LCD screen Reply with quote
Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> writes:
Quote:
It's fairly common to break the corners off a monochrome LCD to allow
it to fit within a circular or elliptical outline. Cheaper than a true
circular outline.

I find that rather hard to believe. If you break the corners off, the
LC will leak out of the D.
Back to top
John Woodgate
Guest
Posted: Fri Apr 22, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
I read in sci.electronics.design that Eric Smith <eric@brouhaha.com>
wrote (in <qh8y3cj5wc.fsf@ruckus.brouhaha.com>) about 'A round shaped
LCD screen', on Thu, 21 Apr 2005:
Quote:
Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> writes:
It's fairly common to break the corners off a monochrome LCD to allow
it to fit within a circular or elliptical outline. Cheaper than a true
circular outline.

I find that rather hard to believe. If you break the corners off, the
LC will leak out of the D.

..... and it's not particularly pleasant stuff. Luckily, there is not
much of it.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk
Back to top
Spehro Pefhany
Guest
Posted: Fri Apr 22, 2005 12:35 am    Post subject: Re: A round shaped LCD screen Reply with quote
On 21 Apr 2005 12:17:55 -0700, the renowned Eric Smith
<eric@brouhaha.com> wrote:

Quote:
Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> writes:
It's fairly common to break the corners off a monochrome LCD to allow
it to fit within a circular or elliptical outline. Cheaper than a true
circular outline.

I find that rather hard to believe. If you break the corners off, the
LC will leak out of the D.

Yeah, okay, they break the corners off the glass *before* they
assemble and seal it.

It's was just intended as a description of the (irregular octagon)
shape of the LCD, not a description of the manufacturing process, wot?


Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
Back to top
 
Post new topic   Reply to topic    Electronics Forum Index -> Equipment All times are GMT
Goto page Previous  1, 2
Page 2 of 2

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Home & Living New Topics
Contact Us
Powered by phpBB