Is it true that, unlike LCD, DLP projectors don need cleaning?
NO! This is the little white lie that DLP vendors tend to use by misinterpreting the actual advantage DLP has over LCD. While it is true that most, if not all, DLP projectors do not have intake dust filters, that doesn’t automatically mean they will stay pristinely clean forever. The true reason for removing the filters is to prevent typical human nature from allowing DLP projectors to clog up, overheat and fail, just like LCD projectors do when the filters aren’t cleaned. You can’t get away with removing the filter on an LCD projector because little speckles of dust will end up on the panels and eventually obliterate the projected image. With DLP, it is rare that dust can settle on the one tiny DMD chip, which has a color wheel rotating and high speed in close proximity, in effect acting like a fan to blow away the dust before it settles. So in this respect, it’s true that part of the projector doesn’t need regular cleaning; the DMD chip and the dust filter that doesn’t exist. However
