Breaking News
Comments
Newest First | Oldest First | Threaded View
CTHP
User Rank
Rookie
Re: Idea on increasing refresh rate
CTHP   1/31/2014 3:39:05 PM
NO RATINGS
CRT, LCD, Plasma, LED, OLED ... new ideas have to start somewhere; a good effort. The material used in this prototype has bulk characteristics and the slow refresh rate is expected. A little materials science and a new thermochromic formula might result in a nano-particle material that will respond faster to changes in applied thermal energy.

David Ashton
User Rank
Blogger
Re: Sell yourself better, guys....
David Ashton   1/30/2014 6:31:12 PM
NO RATINGS
I'm not a pro, Caleb, just done a bit of photography,  and I was trying to be constructive....just if I was trying to push something, I'd aim for a bit better than this....

David Ashton
User Rank
Blogger
Re: Idea on increasing refresh rate
David Ashton   1/30/2014 6:28:43 PM
NO RATINGS
HI Caleb.  Yeah, I don't think it would be worth the effort either.  Peltier might be worth a try but I don't know if you can get them that small.    Thinks - since the thermochromic stuff does different colours, maybe you could make a colour dispolay by using different drive levels.....

Caleb Kraft
User Rank
Blogger
Re: Idea on increasing refresh rate
Caleb Kraft   1/30/2014 6:07:51 PM
NO RATINGS
compressed air would work, but I suspect it wasn't really worth the effort to him. He may have gained a second on the refresh rate, but maybe he didn't want it that bad?

Caleb Kraft
User Rank
Blogger
Re: Sell yourself better, guys....
Caleb Kraft   1/30/2014 6:06:48 PM
NO RATINGS
Hey, not everyone is a pro!

David Ashton
User Rank
Blogger
Sell yourself better, guys....
David Ashton   1/30/2014 5:12:58 PM
NO RATINGS
The video is pretty amateurish and does not do this great idea justice. Use a tripod to keep the camera still, and sort out your lighting to minimise reflections (with a curved surface like this, use side lighting).   And show us how fast it can change.

David Ashton
User Rank
Blogger
Re: Idea on increasing refresh rate
David Ashton   1/30/2014 5:05:47 PM
NO RATINGS
@Templar...good idea, but that needs consumables - bad news.  You might be able to just use compressed air though.   I was thinking miniature peltier modules - use a lot of them to make segments or a dot matrix.  Depending how you drive them they will heat or cool.   You'd probably only have to cool temporarily to erase,  but to display you'd have to keep current flowing - but then you do at the moment with the NiChrome wire.

I doubt this will be a game-changing display technology but it could take off for aesthetic reasons - it is quite pretty....

templar781
User Rank
Rookie
Idea on increasing refresh rate
templar781   1/30/2014 4:47:38 PM
NO RATINGS
When I read that the refresh rate was slow a thought popped into my head on how to possibly speed it up.  Could a micro-miniature solenoid valve be used to dispense cold spray to the rear of the display?  The -60F cold spray should take only milliseconds to essentially "erase" the heat generated character. 

The valve could be controlled by the Arduino that's driving the heating coils, and with a little adjustment to direction, spread, and duration it may be able to dispense the cold spray so that the "erase" mode gets to be very precise as far as timing and perhaps even location is concerned.



Most Recent Comments
Kevin Krewell
 
daleste
 
Ian Johns
 
Etmax
 
daleste
 
alex_m1
 
Ian Johns
 
David Ashton
 
MeasurementBlues
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Oh, No! My Antique Analog Meter Has Twitched Its Last
Max Maxfield
20 comments
Well, life is certainly full of ups and downs, isn't it? When it comes to the antique analog meters I'm using in a number of my hobby projects, things appeared to be going swimmingly well, ...

EDN Staff

11 Summer Vacation Spots for Engineers
EDN Staff
20 comments
This collection of places from technology history, museums, and modern marvels is a roadmap for an engineering adventure that will take you around the world. Here are just a few spots ...

Glen Chenier

Engineers Solve Analog/Digital Problem, Invent Creative Expletives
Glen Chenier
15 comments
- An analog engineer and a digital engineer join forces, use their respective skills, and pull a few bunnies out of a hat to troubleshoot a system with which they are completely ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
46 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)