An image projection apparatus includes an image signal inputter configured to input an image signal, a first light modulation element configured to modulate light from a light source, a second light modulation element configured to modulate light from the first light modulation element, an optical system configured to guide a projection image in which an image formed by the light modulated by the first light modulation element and an image formed by the light modulated by the second light modulation element are superimposed on each other to a projection optical system, a first driver configured to drive one of the first and second light modulation elements based on the image signal, and a second driver configured to drive the other of the first and second light modulation elements based on a luminance correction data irrelevant to the image signal.

Polarizing beam splitters and systems incorporating such beam splitters are described. More specifically, hybrid polarizing beam splitters and systems with such beam splitters that incorporate polymeric reflective polarizers aligned with MacNeille or wire grid reflective polarizers are described.

Polarizing beam splitters and systems incorporating such beam splitters are described. More specifically, hybrid polarizing beam splitters and systems with such beam splitters that incorporate polymeric reflective polarizers aligned with MacNeille or wire grid reflective polarizers are described.

A projector includes an illumination system that outputs illumination light containing white light, which is visible light, and infrared light, an image formation section that forms image light from the illumination light, a projection system that projects the image light on a projection surface and radiates the infrared light onto the projection surface, and a detection section that detects a pointing element based on reflected light formed of the radiated infrared light. The image formation section includes a light-exiting-side polarizer that transmits the visible light in such a way that the light-exiting-side polarizer transmits light formed of one polarization component and blocks light formed of another polarization component, and the light-exiting-side polarizer transmits the infrared light in such a way that the light-exiting-side polarizer transmits the two polarization components of the infrared light.

Systems and methods for wide field of view (FOV) image projection using a spatial light modulator (SLM) and a fast steering mirror (FSM) cooperatively managed by a projection sequence controller. The computer-implemented process determines projection regions within the FOV, creates sub-images of an input target image for each of the regions, and operates the SLM and FSM to time-division multiplex sequential projections of each of the sub-images and to direct each projection to a respective region in the FOV within an observer frame rate. The projection sequence controller determines the number projection regions within the FOV based on a projection frame time of the SLM (including a frame read-in time and a modulation time), a mirror steering time of the FSM, and the observer frame rate.

A control apparatus includes a calculator that calculates a target dimming rate of a projection display apparatus based on a feature quantity of image data, a diaphragm controller that controls a diaphragm position of a diaphragm based on a target diaphragm position set for each range to which the target dimming rate belongs, and a light source controller that controls a light quantity of a light source on the basis of the target dimming rate and the diaphragm position.

A control apparatus includes a calculator that calculates a target dimming rate of a projection display apparatus based on a feature quantity of image data, a diaphragm controller that controls a diaphragm position of a diaphragm based on a target diaphragm position corresponding to the target dimming rate, and a light source controller that controls a light quantity of a light source based on the target dimming rate and a dimming rate of the diaphragm at least until the diaphragm position of the diaphragm matches the target diaphragm position.

A projector includes: a projection unit projecting a projection image onto a projection surface where an object is located, the object defining a projection area where the projection image should be projected; an image pickup unit picking up an image of the projection surface and thus generating picked-up image information representing a picked-up image; an object detection unit detecting the object, based on the picked-up image information; and a projection control unit controlling a brightness of the projection image, based on a result of detection of the object.

A cooling system for controlling the temperature of a light valve of a projection system, the light valve being illuminated by a light source, the cooling system including a first sensor for measuring a first temperature of a first part of the light valve, at least one active heating and/or cooling device to transfer heat between the light valve and a heat source and/or sink, a controller for controlling the temperature of the light valve with the at least one active heating and/or cooling device according to the first temperature with respect to a reference temperature. The cooling system further includes a sensor for determining the amount of light absorbed by the light valve, and where the controller is further configured to control the active heating and/or cooling device based on the amount of light absorbed by the light valve.

A projector includes an illumination system that outputs illumination light containing white light, which is visible light, and infrared light, an image formation section that forms image light from the illumination light, a projection system that projects the image light on a projection surface and radiates the infrared light onto the projection surface, and a detection section that detects a pointing element based on reflected light formed of the radiated infrared light. The image formation section includes a light-exiting-side polarizer that transmits the visible light in such a way that the light-exiting-side polarizer transmits light formed of one polarization component and blocks light formed of another polarization component, and the light-exiting-side polarizer transmits the infrared light in such a way that the light-exiting-side polarizer transmits the two polarization components of the infrared light.