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Re: Liquid crystal in auto lights?
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CarGuru > Technology > Re: Liquid crystal in auto lights? 8 May 2005 22:28:46

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Re: Liquid crystal in auto lights?

Paul 25 April 2005 06:51:33
 Benny wrote:>
Has anyone heard about using liquid crystal on headlights and tail> lights? I searched yahoo for liquid crystal lamps and found this site:>

No. LCD's do not generate light. They only block light.
I would think it would be simpler just to turn the light on and off
as needed.
Add comment
Paul Hovnanian P.E. 25 April 2005 09:27:54 permanent link ]
 Â« Paul » wrote:>
Benny wrote:> >
Has anyone heard about using liquid crystal on headlights and tail> > lights? I searched yahoo for liquid crystal lamps and found this site:> >
No. LCD's do not generate light. They only block light.> I would think it would be simpler just to turn the light on and off> as needed.

It looks like they are using liquid crystals to control the beam
pattern.

--
Paul Hovnanian mailto:P­aul@Hovnani­an.com
-------------------­--------------------­--------------------­-------
Human beings were created by water to transport it uphill.
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John G 26 April 2005 06:54:25 permanent link ]
 
"Benny" <bennybenevedes@yah­oo.com> wrote in message
news:1114472457.775­953.33290@l41g2000cw­c.googlegroups.com..­.

«» wrote:> Benny wrote:> >
Has anyone heard about using liquid crystal on headlights and tail> > lights? I searched yahoo for liquid crystal lamps and found this
site:> >
No. LCD's do not generate light. They only block light.> I would think it would be simpler just to turn the light on and off> as needed.
Looks like they reduced the number of housings and bulbs to 1 per side.

Someone told me in another thread recently that the backward USA had
finally abandoned red rear turn signals.
Is this company trying to bring them back?
--
John G

Wot's Your Real Problem?



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John G 27 April 2005 06:55:43 permanent link ]
 
"Benny" <bennybenevedes@yah­oo.com> wrote in message
news:1114565721.660­868.319230@f14g2000c­wb.googlegroups.com.­..> The LED lamp video shows a yellow, I think the halogen was designed > for> GM, looks like their lamps...>

This thread was started (by you I think) about liquid crystals.

Everyone knows there are yellow LEDs but why are they touting an LC lamp
with various formats of RED?

Does GM drag the USA backwards for its own commercial ends?
--
John G

Wot's Your Real Problem?


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Daniel J. Stern 27 April 2005 09:26:18 permanent link ]
 On Tue, 26 Apr 2005, John G wrote:
Someone told me in another thread recently that the backward USA had> finally abandoned red rear turn signals.

That's not correct at all. The US still permits red rear turn signals,
either as the brake light flashing or as a separate red light, identical
to the brake light and often right next to the brake light, so you get
"duelling reds". And what's more, the US is actively trying to force the
rest of the world to accept the red rear turn signals they (the rest of
the world) rejected entirely by the mid '60s.

DS
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Ashton Crusher 27 April 2005 09:51:54 permanent link ]
 On 25 Apr 2005 16:40:57 -0700, "Benny" <bennybenevedes@yah­oo.com>
wrote:
«» wrote:>> Benny wrote:>> >
Has anyone heard about using liquid crystal on headlights and tail>> > lights? I searched yahoo for liquid crystal lamps and found this>site:>> >
No. LCD's do not generate light. They only block light.>> I would think it would be simpler just to turn the light on and off>> as needed.>
Looks like they reduced the number of housings and bulbs to 1 per side.

The assembly will probably wind up costing more then multiple bulb
systems, and if the one bulb burns out you will have neither stop/turn
nor tail lamps.
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John G 27 April 2005 11:00:28 permanent link ]
 
"Daniel J. Stern" <dastern@127.0.0.1>­ wrote in message
news:P­ine.GSO.4.58.­0504270124260.13829@­alumni.engin.umich.e­du...> On Tue, 26 Apr 2005, John G wrote:>
Someone told me in another thread recently that the backward USA had>> finally abandoned red rear turn signals.>
That's not correct at all. The US still permits red rear turn signals,> either as the brake light flashing or as a separate red light, > identical> to the brake light and often right next to the brake light, so you get> "duelling reds". And what's more, the US is actively trying to force > the> rest of the world to accept the red rear turn signals they (the rest > of> the world) rejected entirely by the mid '60s.>
DS

So why are they (the US) trying to drag the rest of the world back to
the 1950s
It can not be that much cheaper when you have to have a more
complicated Turn switch.
And surley Red stop and Amber turn is better for safety.
--
John G

Wot's Your Real Problem?



Add comment
Paul Hovnanian P.E. 30 April 2005 04:01:30 permanent link ]
 "Daniel J. Stern" wrote:>
[snip]
What's stopping mandatory amber rear signals in North America isn't that> they're not better, it's the automakers' "Show us the river of blood on> the highway 'cause we allow red, or we forbid you to mandate amber!"> relationship with the regulators -- and those regulators' acquiescence.

Saving what can't be more than a few nickels in cost by using red rear
turn signals is an indicator of how close to the bone a manufacturer is
willing to shave their design. If, as a buyer, I think amber turn
signals are better, I'm not going to think very highly of a company that
gets that cheap.

Rather than showing them a river of blood, customers need to show these
manufacturers a river of red ink on their balance sheets.

--
Paul Hovnanian mailto:P­aul@Hovnani­an.com
-------------------­--------------------­--------------------­-------
Don't get even -- get odd! :¬þ
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Nate Nagel 30 April 2005 04:56:22 permanent link ]
 Paul Hovnanian P.E. wrote:
"Daniel J. Stern" wrote:>
[snip]>
What's stopping mandatory amber rear signals in North America isn't that>>they're not better, it's the automakers' "Show us the river of blood on>>the highway 'cause we allow red, or we forbid you to mandate amber!">>relationsh­ip with the regulators -- and those regulators' acquiescence.>
Saving what can't be more than a few nickels in cost by using red rear> turn signals is an indicator of how close to the bone a manufacturer is> willing to shave their design. If, as a buyer, I think amber turn> signals are better, I'm not going to think very highly of a company that> gets that cheap.>
Rather than showing them a river of blood, customers need to show these> manufacturers a river of red ink on their balance sheets.>

The problem is, a LOT of vehicles that are sold these days are not sold
to private individuals, but to companies who themselves are trying to
keep costs low and profits high. Car rental places, companies that
lease cars to corporate customers, that kind of thing.

I'm finding this out myself... I'm applying for a new job and one of
the "perks" is a company car. "best of a bad lot" certainly describes
what my decision making process will be if I get the job.

It's actually a tough decision for me... 17 year old beater Porsche or
new company Ch*vy? I know which I'd *prefer* but sadly I know which is
also the better deal financially... :(­

nate


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Daniel J. Stern 30 April 2005 05:55:26 permanent link ]
 On Fri, 29 Apr 2005, Paul Hovnanian P.E. wrote:
Saving what can't be more than a few nickels in cost by using red rear> turn signals is an indicator of how close to the bone a manufacturer is> willing to shave their design. If, as a buyer, I think amber turn> signals are better, I'm not going to think very highly of a company that> gets that cheap.

Good, we need more of you, because right now, people at Honda and Nissan
and Ford claim that "Americans prefer red turn signals" while Audi and GM
and Chrysler and Toyota and Mazda play with rear turn signal color as a
styling gimmick.

Add comment
Ashton Crusher 30 April 2005 10:42:53 permanent link ]
 On Fri, 29 Apr 2005 21:55:26 -0400, "Daniel J. Stern"
<dastern@127.0.0.1>­ wrote:
On Fri, 29 Apr 2005, Paul Hovnanian P.E. wrote:>
Saving what can't be more than a few nickels in cost by using red rear>> turn signals is an indicator of how close to the bone a manufacturer is>> willing to shave their design. If, as a buyer, I think amber turn>> signals are better, I'm not going to think very highly of a company that>> gets that cheap.>
Good, we need more of you, because right now, people at Honda and Nissan>and Ford claim that "Americans prefer red turn signals" while Audi and GM>and Chrysler and Toyota and Mazda play with rear turn signal color as a>styling gimmick.

God forbid the companies give people what they want, esp when research
results from the REAL WORLD demonstrates that it makes no difference.
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John G 30 April 2005 16:09:04 permanent link ]
 
"Ashton Crusher" <Hello@nowhere.net>­ wrote in message
news:m5a671t270vm3o­t9n5m2fu56uiuhh5mrlr­@4ax.com...> On Fri, 29 Apr 2005 21:55:26 -0400, "Daniel J. Stern"> <dastern@127.0.0.1>­ wrote:>
On Fri, 29 Apr 2005, Paul Hovnanian P.E. wrote:>>
Saving what can't be more than a few nickels in cost by using red >>> rear>>> turn signals is an indicator of how close to the bone a manufacturer >>> is>>> willing to shave their design. If, as a buyer, I think amber turn>>> signals are better, I'm not going to think very highly of a company >>> that>>> gets that cheap.>>
Good, we need more of you, because right now, people at Honda and >>Nissan>>and Ford claim that "Americans prefer red turn signals" while Audi and >>GM>>and Chrysler and Toyota and Mazda play with rear turn signal color as >>a>>styling gimmick.>
God forbid the companies give people what they want, esp when research> results from the REAL WORLD demonstrates that it makes no difference.> --

Who said the people wanted red turn signals?
I suppose THE people wanted to invade Iraq too.
You would believe anything you are fed.
Oh and by the way, only a small , very small minded, part of the world
have red turn signals forced on them.
--
John G

Wot's Your Real Problem?


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Don Stauffer 30 April 2005 18:12:56 permanent link ]
 Okay, I missed the start of the thread, but what does LCD have to do
with turn signals?
Add comment
Daniel J. Stern 2 May 2005 02:44:36 permanent link ]
 On Sat, 30 Apr 2005, Ashton Crusher wrote:
Incorrect. There is no such bottom line, one way or the other, but> >there's a whole hell of a lot of data supporting amber rather than red,> >and none the other way around. Remember, the absence of evidence does> >NOT constitute evidence of absence.
Wrong, there is no absence of evidence. The study has been done.

Hasn't. Perhaps you have a selective-onset reading disability. Let's try
again. I'll type slowly for you -- sounding out the hard words might help
your comprehension:

They compare the crash involvement rates of vehicles with amber rear
indicators and otherwise identical vehicles with red, and find no
significant difference. Duh. It's not the signalling vehicle that depends
on its own signals...it's the vehicles AROUND the signalling vehicle that
depend on the signalling vehicle's signals! The guy with the confusing
signals probably won't be involved in a crash on account of his signals,
but what about the guy behind him who has to take time (at 70mph) for
"Whoah, red light, let's see...is that a brake light? I can't quite see
the center brake light, nor can I see the other side brake light...is it
flashing? Yes, it's flashing, but I need to watch a few flash cycles to
see if they're steady or if...maybe the driver's getting on and off the
brake?"

...Or the guy behind him?

...Or the guy behind *him*?


And *THAT* research hasn't been done. The rest of the world (the ENTIRE
rest of the world) has looked at the mountain of data supporting amber,
agreed that it'd be extremely expensive and difficult to track the crash
involvement of cars that happen to be behind red-signal vs. amber-signal
vehicles when the signalling vehicle itself isn't involved in the crash,
and based their regulations upon the preponderance of evidence.

That does not mean there's no difference between red and amber. It just
means the crash rates of the vehicles that *would* be affected by amber
vs. red haven't been tracked. Until that is done, it's not supportable by
fact to say that rear turn signal color makes no difference to safety.

DS (Ashton, I didn't see you at the last few Transportation Research Board
Visibility Committee conferences...where­ were you hiding? Or is it just
that you're not a member?)
Add comment
Ashton Crusher 2 May 2005 09:49:44 permanent link ]
 On Sun, 1 May 2005 18:44:36 -0400, "Daniel J. Stern"
<dastern@127.0.0.1>­ wrote:
On Sat, 30 Apr 2005, Ashton Crusher wrote:>
Incorrect. There is no such bottom line, one way or the other, but>> >there's a whole hell of a lot of data supporting amber rather than red,>> >and none the other way around. Remember, the absence of evidence does>> >NOT constitute evidence of absence.>
Wrong, there is no absence of evidence. The study has been done.>
Hasn't. Perhaps you have a selective-onset reading disability. Let's try>again. I'll type slowly for you -- sounding out the hard words might help>your comprehension:>
They compare the crash involvement rates of vehicles with amber rear>indicators and otherwise identical vehicles with red, and find no>significant difference. Duh. It's not the signalling vehicle that depends>on its own signals...it's the vehicles AROUND the signalling vehicle that>depend on the signalling vehicle's signals!

There could be *some* accidents that escape but not everyone here fell
off the turnip truck yesterday. If the amber/red was significant
there would be more people running into the back of the red only cars
due to the alleged confusion you keep claiming red causes. Nice try
though.

And *THAT* research hasn't been done. The rest of the world (the ENTIRE>rest of the world) has looked at the mountain of data supporting amber,>agreed that it'd be extremely expensive and difficult to track the crash>involvement of cars that happen to be behind red-signal vs. amber-signal>vehicl­es when the signalling vehicle itself isn't involved in the crash,>and based their regulations upon the preponderance of evidence.>

No, they based it on their flights of fancy and idle speculation, as
you keep doing.

That does not mean there's no difference between red and amber. It just>means the crash rates of the vehicles that *would* be affected by amber>vs. red haven't been tracked. Until that is done, it's not supportable by>fact to say that rear turn signal color makes no difference to safety.>

Nor is it supported by fact that amber is better. See how that
works!!
DS (Ashton, I didn't see you at the last few Transportation Research Board>Visibility Committee conferences...where­ were you hiding? Or is it just>that you're not a member?)


I'm sure you guys had a nice circle jerk.
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Daniel J. Stern 2 May 2005 19:29:19 permanent link ]
 On Mon, 2 May 2005, Bill wrote:
Ashton Crusher wrote:
Nor is it supported by fact that amber is better. See how that> > works!!>
I'd like to see some facts that support your assertation that xxx> doesn't work as well. I bet you don't have any.

That's just it: Ashton seems to lack even a rudimentary grasp of the
principles of basic logic and factual support. Among the things he seems
not to understand is the impossibility of proving a negative and the
difference between absence of evidence and evidence of absence.

DS
Add comment
James C. Reeves 3 May 2005 02:09:41 permanent link ]
 
"Bill" <dontspamoleexray@c­oqui.net> wrote in message
news:117bgrglr6hl0d­@corp.supernews.com.­..>
I'd like to see some facts that support your assertation that xxx doesn't > work as well. I bet you don't have any.>
I'm a regular driver. I think amber is better.>

I do too...and I have both types. The Wife's Strates (with Red) and my
Sebring (with Amber). The cars are virtually identical otherwise. The red
turn signal is virtually invisable when the brakes are appied on the wife's
Stratus.


Add comment
JazzMan 3 May 2005 04:57:46 permanent link ]
 John G wrote:>

Without wanting to suggest that that survey was done by a brainwashed> american who would not want to admit he was wrong to the rest of the> world..>
The point remains that combining the two functions, stop and turn, in> the one lamp puts another little decision on the driver who is already> overloaded with decisions to make in too short a time.

You say this with such authority that I assume you have
a cite to a study or studies that backs you up on this
contention?

JazzMan
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John G 3 May 2005 05:23:10 permanent link ]
 
"JazzMan" <No_Spam@airmail.ne­t> wrote in message
news:4276CC8A.3269@­airmail.net...> John G wrote:>>
Without wanting to suggest that that survey was done by a brainwashed>> american who would not want to admit he was wrong to the rest of the>> world..>>
The point remains that combining the two functions, stop and turn, in>> the one lamp puts another little decision on the driver who is >> already>> overloaded with decisions to make in too short a time.>
You say this with such authority that I assume you have> a cite to a study or studies that backs you up on this> contention?>
JazzMan> --

You must be a graduate looking for work to need a study to prove that.
--
John G

Wot's Your Real Problem?


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Ashton Crusher 3 May 2005 11:20:21 permanent link ]
 On Mon, 2 May 2005 11:29:19 -0400, "Daniel J. Stern"
<dastern@127.0.0.1>­ wrote:
On Mon, 2 May 2005, Bill wrote:>
Ashton Crusher wrote:>
Nor is it supported by fact that amber is better. See how that>> > works!!>>
I'd like to see some facts that support your assertation that xxx>> doesn't work as well. I bet you don't have any.>
That's just it: Ashton seems to lack even a rudimentary grasp of the>principles of basic logic and factual support. Among the things he seems>not to understand is the impossibility of proving a negative and the>difference between absence of evidence and evidence of absence.>
DS


You are pretty much describing yourself there Mr. Stern.
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Paul Hovnanian P.E. 5 May 2005 01:50:02 permanent link ]
 Ashton Crusher wrote:>
On Mon, 02 May 2005 20:28:26 -0700, "Paul Hovnanian P.E."> <Paul@Hovnanian.com­> wrote:

[snip]
So, you are in the left lane on the freeway and you are trying to change> >lanes to the right to catch your exit. Everyone assumes you are slowing> >down and passes you on the right, figuring that you are just another> >moron in the left lane tapping your brakes. No accident. No statistics.> >But I've seen many people who wonder why nobody will let them change> >lanes.>
Why would they assume I'm slowing down? Somehow none of these awful> terrible things that supposedly happen due to the tragic absence of> amber turn signals ever seems to happen in the real world.

Because all they can see is your brake light blinking at them.

I've seen too many people stuck in a left lane (a few do come to a
complete stop) because nobody can tell that they want to change lanes.

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-------------------­--------------------­--------------------­-------
Dedicated to the unrestricted propagation of worthless
information across the Internet.
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Ashton Crusher 5 May 2005 10:22:05 permanent link ]
 On Wed, 04 May 2005 14:50:02 -0700, "Paul Hovnanian P.E."
<Paul@Hovnanian.com­> wrote:
Ashton Crusher wrote:>>
On Mon, 02 May 2005 20:28:26 -0700, "Paul Hovnanian P.E.">> <Paul@Hovnanian.com­> wrote:>
[snip]>
So, you are in the left lane on the freeway and you are trying to change>> >lanes to the right to catch your exit. Everyone assumes you are slowing>> >down and passes you on the right, figuring that you are just another>> >moron in the left lane tapping your brakes. No accident. No statistics.>> >But I've seen many people who wonder why nobody will let them change>> >lanes.>>
Why would they assume I'm slowing down? Somehow none of these awful>> terrible things that supposedly happen due to the tragic absence of>> amber turn signals ever seems to happen in the real world.>
Because all they can see is your brake light blinking at them.>

Um, if it's blinking it means I'm signaling a lane change. And if it
was just the brakes being applied the "signal" never, in my
experience, last more then two flashes. Not that it matters, it takes
more then that for the signal to accomplish anything whether it's
amber or red and the whole issue becomes moot. The "amber v red" is
such an incredible trivial issue it's really amazing how worked up
some people get over it. It's an interesting discussion at times,
more for the way it exposes people thought processes then for any
light it sheds on any actual real world issue that needs to be
addressed.

Those who claim it has some meaningful safety benefit always fall mute
when asked why, if they are so strongly pushing for amber turns, they
are not pushing even stronger for a law requiring we all wear helmets
while driving since that would unquestionably save lives.

I've seen too many people stuck in a left lane (a few do come to a>complete stop) because nobody can tell that they want to change lanes.

They know they want to change lanes, they just don't want to let them
in. It would be no different if they had amber lenses.
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JazzMan 5 May 2005 18:27:57 permanent link ]
 Paul Hovnanian P.E. wrote:>
Ashton Crusher wrote:> >
On Mon, 02 May 2005 20:28:26 -0700, "Paul Hovnanian P.E."> > <Paul@Hovnanian.com­> wrote:>
[snip]>
So, you are in the left lane on the freeway and you are trying to change> > >lanes to the right to catch your exit. Everyone assumes you are slowing> > >down and passes you on the right, figuring that you are just another> > >moron in the left lane tapping your brakes. No accident. No statistics.> > >But I've seen many people who wonder why nobody will let them change> > >lanes.> >
Why would they assume I'm slowing down? Somehow none of these awful> > terrible things that supposedly happen due to the tragic absence of> > amber turn signals ever seems to happen in the real world.>
Because all they can see is your brake light blinking at them.>
I've seen too many people stuck in a left lane (a few do come to a> complete stop) because nobody can tell that they want to change lanes.>

You're right! Whenever I see someone signalling a lane
change with a blinking red light, as defined by one side
blinking and the middle and other side not, then I
will pretend that I can't figure out that they're signalling
and won't let them over. On the other hand, if I see a
separate amber light blinking then I pretend that I can
easily tell that they're signalling and let them right over.

Meh.

JazzMan
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CarGuru > Technology > Re: Liquid crystal in auto lights? 8 May 2005 22:28:46

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