Why LCD 4K pixel-shift projectors are so huge? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 9 Old 01-10-2020, 06:51 AM - Thread Starter
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Why LCD 4K pixel-shift projectors are so huge?

To my knowledge, these projectors like Epson 4010, 5050UB, 5050UBe are just using native 1080p LCD panels with pixel-shifting to create faux-K image.

Why they are so HUGE? Is the LCD prism larger or are the optics larger?
Please someone explain...
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post #2 of 9 Old 01-10-2020, 07:37 AM
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Quote:
Originally Posted by BaltarWithSix View Post
To my knowledge, these projectors like Epson 4010, 5050UB, 5050UBe are just using native 1080p LCD panels with pixel-shifting to create faux-K image.

Why they are so HUGE? Is the LCD prism larger or are the optics larger?
Please someone explain...
The simple answer is 3 panels compared to 1 on a DLP projector.

LED



DLP



Each method have their advantages and disadvantages.

They are more complicated inside with more mirrors and different light paths to travel before reaching the lens.

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post #3 of 9 Old 01-10-2020, 07:46 AM - Thread Starter
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Yes. I know that DLP projectors are much smaller than LCD projector because of their technology BUT my question rather is why these LCD pixel shifter projectors are much bigger than non-pixel shifter LCD projectors?

are the pixel-shifter 3xLCD panels bigger and require bigger opics?
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post #4 of 9 Old 01-10-2020, 08:15 AM
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Quote:
Originally Posted by BaltarWithSix View Post
Yes. I know that DLP projectors are much smaller than LCD projector because of their technology BUT my question rather is why these LCD pixel shifter projectors are much bigger than non-pixel shifter LCD projectors?

are the pixel-shifter 3xLCD panels bigger and require bigger opics?
The Epson TW-7000 is 410‎ x 310 x 157 mm (WxDxH) 4K e-shifter
The Epson TW-5650 is 309‎ x 285 x 122 mm (WxDxH) 1080P

So not a million miles bigger but of course the more professional models like the 4010/5050/6050/9400 are considerably bigger. Both optics are bigger and with a higher lumen output the cooling fans etc will be bigger too, you then need to consider their motorised lens system.

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post #5 of 9 Old 01-10-2020, 09:29 AM
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They also have the lens mechanism motorized. For better cooling(less noise).

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post #6 of 9 Old 01-10-2020, 10:30 AM
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My single chip dlp projector is kind of big...

21"w x 9"h x 25"d 55lbs
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post #7 of 9 Old 01-12-2020, 06:18 PM
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Quote:
Originally Posted by bdht View Post
My single chip dlp projector is kind of big...

21"w x 9"h x 25"d 55lbs
what! 55lbs


I have also noticed that even those single LCD pj's have a very big Lens opening, about more than 2". Would that make their optics more complex & expensive? that some vendors just use plastic lens? Compared to pico dlp which have smaller Lens & I guess there will never be a PICO LCD pj.

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post #8 of 9 Old 01-12-2020, 06:30 PM
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Quote:
Originally Posted by wheelee View Post
what! 55lbs


I have also noticed that even those single LCD pj's have a very big Lens opening, about more than 2". Would that make their optics more complex & expensive? that some vendors just use plastic lens? Compared to pico dlp which have smaller Lens & I guess there will never be a PICO LCD pj.
The actual chip size too contributes to the size of the optics required, and not just the lens but all the mirrors and prisms in the light path and even the light source(or at least the size of the light sources output/opening). Those pico dmds are small, 0.23, 0.33 inches, the LCD chips are 0.7 inches I think. Now imagine the size of lens and optics needed for 3chip 1.38" dmds
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post #9 of 9 Old 01-14-2020, 08:33 AM
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Projector size is often related to intended purpose. For example, projectors designed for portable use are often about the same smaller size regardless of whether they are 3LCD like the Epson HC 2150 or DLP like the BenQ HT2050A. Projectors intended to be permanently installed in home theaters don't need to be small and portable. In addition to often having larger lens systems and additional features, having a larger case allows for more internal baffling to cut down on fan noise which is a higher priority in dedicated home theater projectors than in portable models.
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