How is single chip DLP projector considered P-Scan?

[sdifox]

Reason I am thinking it is not is because of the colour wheel. Essentially, one chip has to divide its time between the x number of colour segments on the colour wheel to composite a frame. So say we have a 3 colour (RGB) wheel to keep it simple. When R comes around, the DMD realigns to present the red portion of the picture, then G rolls around and the DMD changes again to reflect the green portion of the picture. This is repeated again when B comes around, and presummably if it is trying to produce 30FPS, you need to hit 90RPM for a 3 colour setup.

How is that any different than drawing half a screen at a time of the good old TV broadcast?

 

[CTho9305]

Single chip DLPs can be annoying to some people (including me).

 

[imported_miahallen]

Good thing single chip DLP's are evolving.

 

[Bassyhead]

Those single chip DLPs with a color wheel annoy me, too

 

[Matthias99]

Originally posted by: sdifox
Reason I am thinking it is not is because of the colour wheel. Essentially, one chip has to divide its time between the x number of colour segments on the colour wheel to composite a frame. So say we have a 3 colour (RGB) wheel to keep it simple. When R comes around, the DMD realigns to present the red portion of the picture, then G rolls around and the DMD changes again to reflect the green portion of the picture. This is repeated again when B comes around, and presummably if it is trying to produce 30FPS, you need to hit 90RPM for a 3 colour setup.

How is that any different than drawing half a screen at a time of the good old TV broadcast?

Because it's 'drawing' each pixel on the screen simultaneously -- it's just that it has to 'draw' each frame multiple times to get all the colors. The 'subframes' (so to speak) are interleaved temporally, not spatially.

 

[sdifox]

Originally posted by: Matthias99

Originally posted by: sdifox
Reason I am thinking it is not is because of the colour wheel. Essentially, one chip has to divide its time between the x number of colour segments on the colour wheel to composite a frame. So say we have a 3 colour (RGB) wheel to keep it simple. When R comes around, the DMD realigns to present the red portion of the picture, then G rolls around and the DMD changes again to reflect the green portion of the picture. This is repeated again when B comes around, and presummably if it is trying to produce 30FPS, you need to hit 90RPM for a 3 colour setup.

How is that any different than drawing half a screen at a time of the good old TV broadcast?

Because it's 'drawing' each pixel on the screen simultaneously -- it's just that it has to 'draw' each frame multiple times to get all the colors. The 'subframes' (so to speak) are interleaved temporally, not spatially.

but it is still compositing a frame from multiple subframes, which is essentially what normal tv does, except like you said, one is temporal while the other is spatial.

 

[vshah]

well a normal tv is temporal AND spatial, isn't it?