XPost: alt.home.repair, uk.d-i-y
From: Gothberg"@internet.co.is
On Tue, 25 Dec 2018 22:21:27 -0000, % wrote:
> On 2018-12-25 3:09 p.m., William Gothberg wrote:
>> On Tue, 25 Dec 2018 21:51:13 -0000, % wrote:
>>
>>> On 2018-12-25 2:33 p.m., William Gothberg wrote:
>>>> On Tue, 25 Dec 2018 21:00:53 -0000, Rod Speed
>>>> wrote:
>>>>
>>>>>
>>>>>
>>>>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in message
>>>>> news:op.zulf8qz8o5piw3@desktop-ga2mpl8.lan...
>>>>>> On Tue, 25 Dec 2018 18:33:27 -0000, Rod Speed
>>>>>>
>>>>>> wrote:
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in
>>>>>>> message
>>>>>>> news:op.zulb102po5piw3@desktop-ga2mpl8.lan...
>>>>>>>> On Tue, 25 Dec 2018 17:33:52 -0000, Rod Speed
>>>>>>>>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> "William Gothberg" <"William Gothberg"@internet.co.is> wrote in
>>>>>>>>> message
>>>>>>>>> news:op.zukr2cpgo5piw3@desktop-ga2mpl8.lan...
>>>>>>>>>> On Thu, 20 Dec 2018 04:22:39 -0000, Clare Snyder
>>>>>>>>>>
>>>>>>>>>> wrote:
>>>>>>>>>>
>>>>>>>>>>> On Wed, 19 Dec 2018 19:36:51 -0000, "William Gothberg" <"William
>>>>>>>>>>> Gothberg"@internet.co.is> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> On Wed, 19 Dec 2018 17:47:17 -0000, trader_4
>>>>>>>>>>>>
>>>>>>>>>>>> wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> On Wednesday, December 19, 2018 at 11:35:06 AM UTC-5, William
>>>>>>>>>>>>> Gothberg
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>> On Wed, 19 Dec 2018 16:21:41 -0000, Mark Lloyd
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> > On 12/19/18 6:01 AM, William Gothberg wrote:
>>>>>>>>>>>>>> >
>>>>>>>>>>>>>> > [snip]
>>>>>>>>>>>>>> >
>>>>>>>>>>>>>> >> They probably are fairly crude. I know they flicker, for
>>>>>>>>>>>>>> >> example
>>>>>>>>>>>>>> >> if I
>>>>>>>>>>>>>> >> use my cordless drill, the chuck appears to spin the wrong
>>>>>>>>>>>>>> way
>>>>>>>>>>>>>> >> under the
>>>>>>>>>>>>>> >> LED lighting.
>>>>>>>>>>>>>> > I remember seeing that with a washing machine (under
>>>>>>>>>>>>>> fluorescent
>>>>>>>>>>>>>> > lights). As the tub was slowing down, the row of holes
>>>>>>>>>>>>>> around
>>>>>>>>>>>>>> > the
>>>>>>>>>>>>>> > tub
>>>>>>>>>>>>>> > would appear to reverse direction. Same thing with (spoked)
>>>>>>>>>>>>>> > wagon
>>>>>>>>>>>>>> > wheels
>>>>>>>>>>>>>> > in movies.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> It looks absolutely ridiculous with modern cars with LED
>>>>>>>>>>>>>> headlights
>>>>>>>>>>>>>> in
>>>>>>>>>>>>>> films. How hard can it be to put a smoothing capacitor on the
>>>>>>>>>>>>>> output
>>>>>>>>>>>>>> of the power supply?
>>>>>>>>>>>>>
>>>>>>>>>>>>> I've never noticed that. Any films come to mind?
>>>>>>>>>>>>
>>>>>>>>>>>> A lot of Top Gear programs showing the DRLs of cars fitted with
>>>>>>>>>>>> LEDs.
>>>>>>>>>>>> With a feature film, they might take the time/trouble/money
>>>>>>>>>>>> to do
>>>>>>>>>>>> something to stop it.
>>>>>>>>>>>>
>>>>>>>>>>>>> It seems especially
>>>>>>>>>>>>> weird, since cars have a 12V supply with a big battery to
>>>>>>>>>>>>> smooth
>>>>>>>>>>>>> anything out. I guess the power supply that reduces that to
>>>>>>>>>>>>> whatever
>>>>>>>>>>>>> the LED headlights use though might have a switching power
>>>>>>>>>>>>> supply
>>>>>>>>>>>>> these
>>>>>>>>>>>>> days too.
>>>>>>>>>>>>
>>>>>>>>>>>> AFAIK it's deliberate, making the LEDs operate brighter than
>>>>>>>>>>>> they
>>>>>>>>>>>> are
>>>>>>>>>>>> capable of, but only 1/4 of the time. Our eyes just see the
>>>>>>>>>>>> brightest
>>>>>>>>>>>> part of the cycle, so we think they're four times brighter than
>>>>>>>>>>>> the
>>>>>>>>>>>> LED
>>>>>>>>>>>> is really capable of, without overheating itself.
>>>>>>>>>>>
>>>>>>>>>>> That is PWM Overdrive. Peak junction current is over the nominal
>>>>>>>>>>> rating, but the average power consumption is below nominalmaximum
>>>>>>>>>>> current - and the peak lumen output is significantly enhanced
>>>>>>>>>>> without
>>>>>>>>>>> reducing the junction life appreciably.
>>>>>>>>>>> THIS would definitely cause flicker as there is a "significant"
>>>>>>>>>>> dead
>>>>>>>>>>> period between the "strobe flashes"
>>>>>>>>>
>>>>>>>>>> Agreed, although Rod thinks only freaks can see it.
>>>>>>>>>
>>>>>>>>> Its true with car lights.
>>>>>>>>
>>>>>>>> You're obviously wrong,
>>>>>>>
>>>>>>> We'll see...
>>>>>>>
>>>>>>>> just by the number of articles on the internet about it.
>>>>>>>
>>>>>>> That's just the freaks howling about seeing it.
>>>>>>
>>>>>> If it were a small number of freaks, there wouldn't so many
>>>>>> articles and
>>>>>> studies into it.
>>>>>
>>>>> Bullshit.
>>>>
>>>> Tell me, out of interest, when you watch TV at the usual (before HD)
>>>> 25fps interlaced, can you see that it's made up of seperate images? Can
>>>> you notice that a moving object jumps a few inches at a time across the
>>>> screen?
>>>
>>>
>>> if the dope is good enough
>>
>> Don't need dope to see the TV for what it really is. A series of still
>> images intended to fool those with slow eyesight. That's why HD has
>> progressive encoding, doubling the frame rate.
>
> i like when you show your sense of humor
It's spelt humour.
And I wasn't being funny, I was stating a fact - SD TV is shit.
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* Origin: you cannot sedate... all the things you hate (1:229/2)
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