Question about LCD contact strips...

J

Jan Panteltje

Guest
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front
 
On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front
Click to expand...

Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
 
On Tuesday, August 2, 2022 at 9:08:28 AM UTC-4, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front
Click to expand...

I believe they are Zebra strips, but that seems to be a trademark. Generically they are \"Elastomeric connectors\".


--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209
 
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
<eternal.september@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
Click to expand...

There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.
 
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.
Click to expand...

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


--

Rick C.

+ Get 1,000 miles of free Supercharging
+ Tesla referral code - https://ts.la/richard11209
 
On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.
Click to expand...

The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.
 
On a sunny day (Tue, 2 Aug 2022 15:27:42 +0200) it happened Arie de Muijnck
<eternal.september@ademu.com> wrote in
<77b4657f-bb23-ded8-2590-99e631893ebf@ademu.com>:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
Click to expand...

Thank you!
 
On a sunny day (Tue, 2 Aug 2022 06:27:52 -0700 (PDT)) it happened Ricky
<gnuarm.deletethisbit@gmail.com> wrote in
<3771f6a0-8ef7-4508-be2f-c1dc0a55d4d3n@googlegroups.com>:

On Tuesday, August 2, 2022 at 9:08:28 AM UTC-4, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front

I believe they are Zebra strips, but that seems to be a trademark. Generically they are \"Elastomeric connectors\".
Click to expand...

OK, thanks, after googling for \'elastomeric connectors\'
I found some site that makes those
https://www.adkom.de/en/about-displays/display-kontaktierung/rubber-connectors.html

Its funny, I can get the LCDs 5 for 8 USD on ebay from China,
but not those connectors...
Now I will search ebay for it
hey found \'zebra strips\' mm. more expensive than the LCDs!
 
On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
<eternal.september@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.
Click to expand...

Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.

Ricky \"Obviously\" wants to argue and insult but doesn\'t want to think.
 
On Tuesday, August 2, 2022 at 3:03:31 PM UTC-4, John Larkin wrote:
On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.
Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.

Ricky \"Obviously\" wants to argue and insult but doesn\'t want to think.
Click to expand...

Wow! Some people are very sensitive.

A zebra strip has visible bars, which are significantly more narrow than the pads and gaps on the PCBs being connected. So you don\'t need to worry about shorting between pads. I had not heard of these other strips before. I have learned something today.


--

Rick C.

-- Get 1,000 miles of free Supercharging
-- Tesla referral code - https://ts.la/richard11209
 
On Tuesday, August 2, 2022 at 6:08:28 AM UTC-7, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front
Click to expand...

The \'conductive rubber\' strands are side-by-side with insulating separators, end-on
it looks like a dotted line.
These are elastomeric electrical connectors, of couse, but they aren\'t the ONLY elastomeric
connectors; I have seen cylindrical ones with many circular bands of conducting material.

Good luck looking for replacement; the length, breadth, and pitch of the conductors are
all variables that you\'d want to match. Conduction-dimension length, particularly, is critical;
one cannot trim that with scissors and get good results. Thickness, to fit the channel, could
perhaps be allowed undersize, and fit in a bit of plastic shim alongside.

Sometimes an isopropanol wipe and reseating is all a \'damaged\' strip needs for repair.
 
On Tue, 02 Aug 2022 12:03:19 -0700, John Larkin
<jlarkin@highland_atwork_technology.com> wrote:

On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
eternal.september@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.

Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.
Click to expand...

Search for z-axis conductive tape

It might replace a zebra without having to match pitch or pattern.
Amazon has some.
 
On Tuesday, August 2, 2022 at 4:05:04 PM UTC-4, John Larkin wrote:
On Tue, 02 Aug 2022 12:03:19 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.

Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.

Search for z-axis conductive tape

It might replace a zebra without having to match pitch or pattern.
Amazon has some.
Click to expand...

Larkin doesn\'t read my posts, but he should understand that zebra strips have a much finer pitch of the conductive stripes, than the pads, so there is no need to match the stripe pitch to the pad pitch. There will always be multiple conductive stripes on a given pad and multiple insulating stripes between pads. These only work with single row pad arrays, but do not need to match the pads in terms of width. The height of the zebra is important and the length a bit less so as it only has to cover all the pads.

--

Rick C.

-+ Get 1,000 miles of free Supercharging
-+ Tesla referral code - https://ts.la/richard11209
 
John Larkin wrote:
On Tue, 02 Aug 2022 12:03:19 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
eternal.september@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.

Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.


Search for z-axis conductive tape

It might replace a zebra without having to match pitch or pattern.
Amazon has some.
Click to expand...
You don\'t have to match the pitch with Zebras--that\'s one of their main
selling points. The board has to match the glass, is all.

I used them in my Footprints sensors to connect to the metal (later
carbon ink) pixels on the free-standing 9-um PVDF pyroelectric film.

Cheers

Phil Hobbs

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
On Tue, 2 Aug 2022 17:24:16 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Tue, 02 Aug 2022 12:03:19 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
eternal.september@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.

Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.


Search for z-axis conductive tape

It might replace a zebra without having to match pitch or pattern.
Amazon has some.



You don\'t have to match the pitch with Zebras--that\'s one of their main
selling points. The board has to match the glass, is all.
Click to expand...

Surely a coarse pitch will short out or miss a close pad pattern. And
getting them crossways or angled is bad.

Fujipoly makes zebras at 100 to 500 contacts per inch.

There are also Z-wrap connectors, an elastomer shape with wires
wrapped around or inside as the conductors. They get down to numbers
like 0.004\" pitch.



I used them in my Footprints sensors to connect to the metal (later
carbon ink) pixels on the free-standing 9-um PVDF pyroelectric film.

Cheers

Phil Hobbs

Cheers

Phil Hobbs
Click to expand...
 
John Larkin wrote:
On Tue, 2 Aug 2022 17:24:16 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Tue, 02 Aug 2022 12:03:19 -0700, John Larkin
jlarkin@highland_atwork_technology.com> wrote:

On Tue, 2 Aug 2022 18:57:58 +0200, Arie de Muijnck
eternal.september@ademu.com> wrote:

On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

A.

Right. I never considered a zebra to be featureless.

The zebra conductive elastomer strips (plainly visible) are not very
good electrical conductors, but plenty good enough to connect an LCD.
The vertical sliver things are hard metallic conduction paths.


Search for z-axis conductive tape

It might replace a zebra without having to match pitch or pattern.
Amazon has some.



You don\'t have to match the pitch with Zebras--that\'s one of their main
selling points. The board has to match the glass, is all.

Surely a coarse pitch will short out or miss a close pad pattern. And
getting them crossways or angled is bad.

Fujipoly makes zebras at 100 to 500 contacts per inch.

There are also Z-wrap connectors, an elastomer shape with wires
wrapped around or inside as the conductors. They get down to numbers
like 0.004\" pitch.
Click to expand...

We\'re talking about LCD contacts, which aren\'t super fine in general. I
sure wouldn\'t use a Zebra when a misalignment of a few thousandths
mattered. For coarser stuff, you just toss them in and you\'re done.

Cheers

Phil Hobbs


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
On 2022-08-02, Arie de Muijnck <eternal.september@ademu.com> wrote:
On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.
Click to expand...

The cheap stuff is solid rubber wrapped in plastic with foil stripes

--
Jasen.
 
On Wed, 3 Aug 2022 07:44:06 -0000 (UTC), Jasen Betts
<usenet@revmaps.no-ip.org> wrote:

On 2022-08-02, Arie de Muijnck <eternal.september@ademu.com> wrote:
On 2022-08-02 18:35, Ricky wrote:
On Tuesday, August 2, 2022 at 9:37:13 AM UTC-4, jla...@highlandsniptechnology.com wrote:
On Tue, 2 Aug 2022 15:27:42 +0200, Arie de Muijnck
eternal....@ademu.com> wrote:

On 2022-08-02 15:07, Jan Panteltje wrote:
Question about LCD contact strips

Does anybody know what thsoe strips that make edge contact with small LCDs are called?
Looks like I have some defective one.
------------------PCB
|| || <- conductive rubber strip
||_____________ ||
================== LCD
front


Zebra strips.
https://www.google.com/search?q=lcd+zebra+strips

Arie
There are also some featureless elastomer things that have vertically
aligned slivers of conductive metal.

That\'s what everyone is talking about, Zebra strips. Obviously, you didn\'t use the link.


The zebra strips have (black) conductive and (non-black) non-conductive stripes hence the name.
That differs from the silver-needle packed rubber that Larkin mentioned (he wrote \'also\').
I know that as expensive but good EMC shielding stuff. Featureless, unless under a microscope.

The cheap stuff is solid rubber wrapped in plastic with foil stripes
Click to expand...

There are also epoxies with conductive fill particles. The right mix
(or dilution) would be basically z-axis conductive.
 
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