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.

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.

A projector includes a first rotation mechanism that rotates a first optical element that affects light from a light source section, a first detector that detects a first rotational frequency of the first rotation mechanism, a second rotation mechanism that rotates a second optical element that affects the light from the light source section, a second detector that detects a second rotational frequency of the second rotation mechanism, a light modulator, a projection optical apparatus, and a control section. The control section causes the light source section to stop emitting the light in a case where at least one of the first rotational frequency and the second rotational frequency detected by the first detector and the second detector decreases to a value smaller than or equal to a non-zero threshold set in accordance with the rotational frequency.

A liquid crystal television increases or decreases a gradation value when the gradation value of an image signal to be displayed on a liquid crystal panel is within a prescribed range. Further, the liquid crystal television decreases or increases the luminance depending to the gradation value of the image signal based on the increase or decrease in the gradation value. The liquid crystal television applies a voltage depending on the gradation value after the change to the liquid crystal panel, such that a transmittance in the liquid crystal panel is changed (increased or decreased). Further, the liquid crystal television controls each light source to emit light with the luminance after the change, such that the luminance of the light radiated to the liquid crystal panel from the light source is changed (decreased or increased).

In an electro-optical module, a first transparent plate is provided on a second surface of a first substrate of an electro-optical panel. A size of the first transparent plate is smaller than that of the first substrate, and the first substrate includes a protrusion surface protruding from the first transparent plate. In the frame made of metal that accommodates the electro-optical panel and the first transparent plate therein, corner portions bent along the protrusion surface of the first substrate and the side surfaces of the first transparent plate is provided.

Embodiments of the present disclosure provide a projector and a method of driving a projector. The projector includes an image source for generating an image light and a transmission and reflection element. The image light includes a bright-state region image light and a dark-state region image light. The transmission and reflection element includes transmission and reflection units. Each of the transmission and reflection units is configured to reflect the image light irradiated thereon when in a reflective state, and to transmit the image light irradiated thereon when in a transmissive state. The transmission and reflection element is configured to perform one of a transmission and a reflection on the bright-state region image light so that the bright-state region image light is projected and displayed, and perform the other on the dark-state region image light so that the dark-state region image light is not projected and displayed.

Embodiments of the present disclosure provide a projector and a method of driving a projector. The projector includes an image source for generating an image light and a transmission and reflection element. The image light includes a bright-state region image light and a dark-state region image light. The transmission and reflection element includes transmission and reflection units. Each of the transmission and reflection units is configured to reflect the image light irradiated thereon when in a reflective state, and to transmit the image light irradiated thereon when in a transmissive state. The transmission and reflection element is configured to perform one of a transmission and a reflection on the bright-state region image light so that the bright-state region image light is projected and displayed, and perform the other on the dark-state region image light so that the dark-state region image light is not projected and displayed.

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.