On Sunday, May 07, 2017 08:54:26 AM rhkra...@gmail.com wrote: > On Sunday, May 07, 2017 08:49:13 AM rhkra...@gmail.com wrote: > > ATM, I don't plan to try googling for them, but, having said that, after > > I send this, I just might do that, as my curiosity is re-aroused. If I > > come across something, soon or further in the future, I'll try to post > > it here. > > Oh, try googling and/or searching ebay for ["video projector" > cellphone]--you will get plenty of links to explore.
Oh, two things: * on ebay, I found a lot of things that I'll call "passive" projectors, which apparently consist of a cardboard box with a lens on the front (and maybe one or more mirrors)--designed to have a cellphone placed in the unit and then the image projected through the lens. I would expect the image to be pretty dim. * here's a "non-passive" one that seems to have lots of inputs, can use 12 VDC, etc. (I've copied the specifications, below, and note that I picked this one randomly from ebay--it was one of the ones near the top of the search results): 60'' Multimedia Projector Home Cinema Theater HDMI VGA TV USB For PC Cellphone http://www.ebay.com/itm/60-Multimedia-Projector-Home-Cinema-Theater-HDMI-VGA- TV-USB-For-PC-Cellphone-/201423728262 I guess the fact that the native resolution is 640x480 but it can support 1920x1080 means that the image is "interpolated" (right word?) down to 640x480. I suspect most of them work this way, but there may be exceptions. <quote: paartial specifications> Projection Technology LCD Native Resolution VGA (640x480) Supported Resolution 1080P (1920x1080) Input Voltage(V) 100-240V,12V, 2000mA Brightness(Lumens) 500 Brightness Range 100 to 999 Lumens Aspect Ratio 4:3 and 16:9 Contrast Ratio 400:1 OSD Languages Chinese, Russian, Portuguese, Italian, Spanish, German, French, English Projection Screen Size (inch) 20-60 Inch Projection Distance (m) 1.25-4M Video Formats 3GP, MP4, H.264, MPEG, VOB, MOV, AVI Audio Formats ACC/ACC+, WAV, WMA, MP3 Picture Formats JPG, PNG, GIF, BMP, JPEG Connectors HDMI Input, SD Card Slot, USB, VGA Port, 3-in-1 AV In Speakers Included Yes, built-in </quote: partial specifications>