Abstract: An adjustable light-modulating device includes: a light valve disposed to receive colored light provided by a color separator of a projection display apparatus, and capable of modulating the colored light; an adjusting mechanism including a fixing frame to be disposed between the light valve and the color separator, and a mounting frame coupled rotatably to the fixing frame; and a securing unit for securing the light valve to the mounting frame. The fixing frame defines a first hole, and has a first periphery surrounding the first hole. The mounting frame defines a second hole registered with the first hole, and has a second periphery surrounding the second hole. The adjusting mechanism further includes a guide projection formed on one of the first and second peripheries and projecting toward and contacting slidably the other one of the first and second peripheries.

Abstract: An adjustable light-modulating device for a projection display apparatus including a color separator capable of providing colored light includes a light valve and an adjusting mechanism. The light valve is disposed to receive the colored light provided by the color separator of the projection display apparatus, and is capable of modulating the colored light. The adjusting mechanism includes a mounting frame to be disposed between the light valve and the color separator, and a securing unit for securing the light valve to the mounting frame such that the light valve is linearly displaceable and tiltable relative to the mounting frame.