Omega Z33 quartz watch

[Wytnucls]

Omega released an expensive pilot quartz watch last year with normal hands, but also an LCD display, which actually looks like a LED display. I wonder how this is achieved.
With a red LED backlight probably, but I'm not sure how the reverse video effect is done with the LCD. Any thoughts?

[SeanB]

Simple to use a red filter on the LCD reflector and a phosphor coat on there to generate extra red light from the incoming blue or UV light to add extra red light to the display. Do not think a backlight will be used as then battery life will take a dramatic drop.

[Wytnucls]

Your explanation is possible, but the display needs to switched on with the push of a button, so red backlight is more probable, under a negative display. Is a negative display more power hungry than a positive one?
In addition to the temperature-controlled crystal, power consumption could be quite high.

[Wytnucls]

Definitely comes with a red auto-adjust backlight.
Found this:

[Magicmushroom666]

You can usually change LCDs from normal to inverse operation (such as here) by just rotating the front polariser by 90 Degrees I think, Have done this in the past before with a standard car stereo LCD.

[Balaur]

You can usually change LCDs from normal to inverse operation (such as here) by just rotating the front polariser by 90 Degrees I think, Have done this in the past before with a standard car stereo LCD.

Or just reverse the polariser foil (turn it on the other side)

[Wytnucls]

Thanks, I think you're right. Not sure how it works yet, but I found this wikipedia picture:
So there shouldn't be any power hit.
The LCD screen is transflective, meaning that during daytime, ambient light is reflected back and at night, it is LED illuminated through a red filter.

[Wytnucls]

Well, it has, but the backlight is energy hungry, so can't be left on all the time, hence the button press. Some generator powered by wrist movement might work one day.

[dannyf]

but I'm not sure how the reverse video effect is done with the LCD. Any thoughts?

Positive lcd + red filters / background.