Auflösung Crosstalk Probleme

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Loendert
Neuling

#1 erstellt: 09. Mai 2011, 13:35

In forum 3D-brillen im PTA02-Set werden die timing gemessen von dem 3D brillen.
Ich weiß, dass eine winzige Verzögerung genug ist das die crosstalk sich auflösen.

Die Lösung könnte darin bestehen, statt ein RC-Filter vor dem IR-LED.
Dies führt zu einer kleinen Verzögerung, bevor die LED emittiert, wodurch die crosstalk weg geht.

Gibt es technische Jungs, die dies bestätigen können?

Loendert
Neuling

#2 erstellt: 09. Mai 2011, 17:12

Oke, forget about the RCfilter in the IR Transmitter, this cannot work (it's protocols that are sent).
The mistake Philips made is that they used the XPAND-103 series, which have a very nasty problem.
They only have 2 protocols (states): 1. Left open, Right closed and 2. Right open, left closed
It's impossible for these glasses to have both lenses closed at the same time. There will always be one lens open.
The only thing philips can do to avoid crosstalk, is to shorten the frame sent to one lens and blacken it out.

But I'm not giving up right now, I openend the glasses and the closing/opening is simply controlled by 2 wires.
The control-state of these wiring is: 1. Open=power on the wires. 2. Closed no power.
So maybe the RC filter could work if I put it IN the glasses. Should be easy to make

JustMax
Schaut ab und zu mal vorbei

#3 erstellt: 10. Mai 2011, 11:55

Ich glaube es ist einfacher neue Brille direkt von xPand zu kaufen, nämlich YOUniversal, die alle mögliche timig Eigenschaften haben sollen.

Loendert
Neuling

#4 erstellt: 10. Mai 2011, 13:02

Right, but the XPand's youniversals aren't available yet for at least a few months.

Further is it a waste of my current 4 Philips Xpands.

Just adding a simple capacitor and resitor maybe sufficient for the small delay (the block pulse will be build up smoother before it gets to the value where the lcd will open). Probably the resistor is already before the lcd and is a capacitor sufficient.

Loendert
Neuling

#5 erstellt: 11. Mai 2011, 15:05

After studying the XPAND's some more, I figured out that I need to add some time to the end of the pulse.

The XPAND's are driven as follows:
-Lens open = 2volts / -2volts
-Lens closed = 14volts / -14volts

The volts are squarewaves in AC mode (one time positive then negative etc). This is because LCD's don't like DC.

So I try to figure out how to add some minor extra time at the end of the 14v/-14v pulse.

duno
Inventar

#6 erstellt: 12. Mai 2011, 16:19

Loendert schrieb:

Right, but the XPand's youniversals aren't available yet for at least a few months.

Are you looking for the X103?

Maybe this can help:

http://www.amazon.co...lasses/dp/B00462RMS6

or

http://www.amazon.de...sr=8-1&condition=new

Hmmm, much cheaper in the US ...

Ups, I think you mean the X104 ...