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Mounting Liquid Crystal Displays

Mounting Liquid Crystal Displays

2007-10-08 by Harry

How are LCDs fastened to PCBs?
They seem to be "glued" somehow to the circuit boards
with some kind of conductive adhesive on the almost
transparent edge connectors.
Can anyone tell me how I can re-mount a display back
onto a circuit board after it has come unstuck?
And what kind of adhesive is used and where can it be
obtained?

Thanks,

Harry - K5HML
San Antonio, Texas

Re: [Homebrew_PCBs] Mounting Liquid Crystal Displays

2007-10-08 by Leon

----- Original Message ----- 
Show quoted textHide quoted text
From: "Harry" <k5hml@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Monday, October 08, 2007 3:55 PM
Subject: [Homebrew_PCBs] Mounting Liquid Crystal Displays


> How are LCDs fastened to PCBs?
> They seem to be "glued" somehow to the circuit boards
> with some kind of conductive adhesive on the almost
> transparent edge connectors.
> Can anyone tell me how I can re-mount a display back
> onto a circuit board after it has come unstuck?
> And what kind of adhesive is used and where can it be
> obtained?

They often use something called 'zebra strip' - a sort of rubber with 
conductive stripes. The display is then clamped to the PCB.

Leon

Re: [Homebrew_PCBs] Mounting Liquid Crystal Displays

2007-10-08 by Steve Wiseman

On 08/10/2007, Leon <leon355@...> wrote:

>  They often use something called 'zebra strip' - a sort of rubber with
>  conductive stripes. The display is then clamped to the PCB.

I recently, finally, found someone who makes and sells the stuff -

http://www.zaxisconnector.com/

Never bought from them, no recommendation, just a link.

Steve

Re: [Homebrew_PCBs] Mounting Liquid Crystal Displays

2007-10-09 by Stefan Trethan

Ok, but what about the displays where a thin plastic foil cable is
somehow attached to the glass? So far i do not know any way to
re-attach them once you ripped off a section by stupid accident.

ST
Show quoted textHide quoted text
On 10/8/07, Steve Wiseman <sjwiseman@...> wrote:
> On 08/10/2007, Leon <leon355@...> wrote:
>
> >  They often use something called 'zebra strip' - a sort of rubber with
> >  conductive stripes. The display is then clamped to the PCB.
>
> I recently, finally, found someone who makes and sells the stuff -
>
> http://www.zaxisconnector.com/
>
> Never bought from them, no recommendation, just a link.
>
> Steve
>
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
> Yahoo! Groups Links
>
>
>
>
>

Re: Mounting Liquid Crystal Displays

2007-10-09 by Dave Miller

--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@...> wrote:
>
> Ok, but what about the displays where a thin plastic foil cable is
> somehow attached to the glass? So far i do not know any way to
> re-attach them once you ripped off a section by stupid accident.
> 
> ST


How about the conductive epoxy that is used to repair Automotive rear 
window defrosters? it is designed to stick to glass and would make a 
conductive connection.

Dave Miller

Re: [Homebrew_PCBs] Re: Mounting Liquid Crystal Displays

2007-10-09 by Stefan Trethan

Yes, but precise application would be required, to avoid shorts.
It would be good to know what they actually use to put it together the
first time.

ST
Show quoted textHide quoted text
On 10/9/07, Dave Miller <dmiller45@...> wrote:
> --- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
> <stefan_trethan@...> wrote:
> >
> > Ok, but what about the displays where a thin plastic foil cable is
> > somehow attached to the glass? So far i do not know any way to
> > re-attach them once you ripped off a section by stupid accident.
> >
> > ST
>
>
> How about the conductive epoxy that is used to repair Automotive rear
> window defrosters? it is designed to stick to glass and would make a
> conductive connection.
>
> Dave Miller
>
>
>
>
> Be sure to visit the group home and check for new Links, Files, and Photos:
> http://groups.yahoo.com/group/Homebrew_PCBs
> Yahoo! Groups Links
>
>
>
>
>

Re: [Homebrew_PCBs] Re: Mounting Liquid Crystal Displays

2007-10-10 by Steve Wiseman

On 09/10/2007, Stefan Trethan <stefan_trethan@...> wrote:

> Yes, but precise application would be required, to avoid shorts.
>  It would be good to know what they actually use to put it together the
>  first time.

At a guess it'll be some heat-sensitive slightly conductive (or with
conductive particles?) glue. You could try a coolis (200oC?) soldering
iron run along the back, as a last resort, but I fear you may be out
of luck. Does it work ifyou press it in place?

Hmm.
http://snipurl.com/3m_lcd_tape
That sort of stuff?

Steve

Re: Mounting Liquid Crystal Displays

2007-10-17 by Steve

--- In Homebrew_PCBs@yahoogroups.com, "Steve Wiseman" <sjwiseman@...>
wrote:
>
> On 08/10/2007, Leon <leon355@...> wrote:
> 
> >  They often use something called 'zebra strip' - a sort of rubber with
> >  conductive stripes. The display is then clamped to the PCB.
> 
> I recently, finally, found someone who makes and sells the stuff -
> 
> http://www.zaxisconnector.com/

Hm... I'd like to start a folder in Links for elastomer connectors and
the directionally conductive tape.

Suggestions on what to name the folder?

Steve Greenfield

Re: [Homebrew_PCBs] Re: Mounting Liquid Crystal Displays

2007-10-18 by Leon

----- Original Message ----- 
Show quoted textHide quoted text
From: "Steve" <alienrelics@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, October 17, 2007 11:48 PM
Subject: [Homebrew_PCBs] Re: Mounting Liquid Crystal Displays


> --- In Homebrew_PCBs@yahoogroups.com, "Steve Wiseman" <sjwiseman@...>
> wrote:
>>
>> On 08/10/2007, Leon <leon355@...> wrote:
>> 
>> >  They often use something called 'zebra strip' - a sort of rubber with
>> >  conductive stripes. The display is then clamped to the PCB.
>> 
>> I recently, finally, found someone who makes and sells the stuff -
>> 
>> http://www.zaxisconnector.com/
> 
> Hm... I'd like to start a folder in Links for elastomer connectors and
> the directionally conductive tape.
> 
> Suggestions on what to name the folder?

Just "LCD connections" should do.

Leon
--
Leon Heller
Amateur radio call-sign  G1HSM
Yaesu FT-817ND transceiver
Suzuki SV1000S motorcycle
leon355@...
http://www.geocities.com/leon_heller

Re: [Homebrew_PCBs] Re: Mounting Liquid Crystal Displays

2007-10-18 by Myc Holmes

Another tradename for the elastomeric connectors is "Zebra Strip".

Myc


On 10/18/07, Leon <leon355@...> wrote:
>
>   ----- Original Message -----
> From: "Steve" <alienrelics@... <alienrelics%40yahoo.com>>
> To: <Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>>
> Sent: Wednesday, October 17, 2007 11:48 PM
> Subject: [Homebrew_PCBs] Re: Mounting Liquid Crystal Displays
>
> > --- In Homebrew_PCBs@yahoogroups.com <Homebrew_PCBs%40yahoogroups.com>,
> "Steve Wiseman" <sjwiseman@...>
> > wrote:
> >>
> >> On 08/10/2007, Leon <leon355@...> wrote:
> >>
> >> > They often use something called 'zebra strip' - a sort of rubber with
> >> > conductive stripes. The display is then clamped to the PCB.
> >>
> >> I recently, finally, found someone who makes and sells the stuff -
> >>
> >> http://www.zaxisconnector.com/
> >
> > Hm... I'd like to start a folder in Links for elastomer connectors and
> > the directionally conductive tape.
> >
> > Suggestions on what to name the folder?
>
> Just "LCD connections" should do.
>
> Leon
> --
> Leon Heller
> Amateur radio call-sign G1HSM
> Yaesu FT-817ND transceiver
> Suzuki SV1000S motorcycle
> leon355@... <leon355%40btinternet.com>
> http://www.geocities.com/leon_heller
> 
>


[Non-text portions of this message have been removed]

Re: Mounting Liquid Crystal Displays

2007-10-18 by Steve

--- In Homebrew_PCBs@yahoogroups.com, "Leon" <leon355@...> wrote:
>
> ----- Original Message ----- 
> From: "Steve" <alienrelics@...>


> > Hm... I'd like to start a folder in Links for elastomer connectors and
> > the directionally conductive tape.
> > 
> > Suggestions on what to name the folder?
> 
> Just "LCD connections" should do.

But they are for more than that, since I'm not limiting this to just
the elastomer/zebra strip connectors. 

For now, I've called the folder "Connectors - flexible". Add links there.

Steve Greenfield