An illumination device (100) includes a solid-state light source device (10), a pickup lens unit (20) on which light from the solid-state light source device is incident, and a polarization conversion element (40). A lens (22) constituting the light exit surface of the pickup lens unit (20) is an aspherical lens having a light exit surface shaped like a rotationally symmetric shape centered on a light axis (40ax) when viewed from a direction of the light axis (40ax), and having a cross-section of an aspherical shape when cut with a plane parallel to the light axis (40ax). The light exit surface of the aspherical lens has a function of collimating and then emitting the light having been emitted from the center of the solid-state light source device (10) in an area near to the light axis (40ax), and emitting the light so as to converge toward the light axis in an area far from the light axis (40ax).

Projection systems and components thereof are described that are well suited to miniaturization. These systems and components may use one or more of the following features: a folded optical path, as in a reflective cavity or a beamsplitter; an illumination beam that is converging at the place where it impinges upon the spatial light modulator; a beamsplitter that uses opposed prisms of substantially different sizes; a beamsplitter whose obliquely disposed partial reflector defines a first rectangular reference space, and where at least a portion of the light source or at least a portion of the projector lens is disposed within such first rectangular reference space; a system in which a ratio of areas of the first rectangular reference space and a second rectangular reference space is within a specified range, where the second rectangular reference space is just large enough to encompass the optical components of the projector; a system in which the projector lens is small compared to the spatial light modulator.

An image display device includes: a first display panel and a second display panel in which transmittance or reflectance of light is controlled on the basis of an image signal; and a light irradiation unit that irradiates the first display panel and the second display panel with light, wherein the first display panel and the second display panel are sequentially driven by image signals corresponding to a plurality of color light beams, and in a period in which one of the first display panel and the second display panel is driven by an image signal corresponding to any one of the plurality of color light beams, an image signal for driving the other display panel is switched.

In a projection type display apparatus, a lighting device includes two reflection type cutoff filters (first cutoff filter and reflective second cutoff filter) which block out ultraviolet range light on an output optical path from a light source. A cut on wavelength of the second cutoff filter on the front side is longer than that of the first cutoff filter on the rear side. The two cutoff filters are formed on planar-shaped first faces of a first integrator lens and a second integrator lens. For this reason, both input faces of the two cutoff filters are orthogonal to an apparatus optical axis.

A display apparatus includes a detecting unit that detects a start position and an end position of an effective image area of an analog image signal, and a determination unit that determines a candidate format as a format of the analog image signal if a first difference and a second difference satisfy a predetermined condition. The first difference represents a difference between the start position of the effective image area and a start position of an effective image area of the candidate format. The second difference represents a difference between the end position of the effective image area and an end position of the effective image area of the candidate format.

A projector according to an aspect includes a light source device, a light modulation device adapted to modulate light from the light source device to form image light, a projection optical system adapted to perform tilted projection of the image light input from the light modulation device to display an image, and a guide display section adapted to display a guide image used for fitting the image projected by the projection optical system to a screen, the guide image is provided with a focus adjustment pattern forming area disposed in a central portion in a direction perpendicular to a tilt direction in a peripheral zone on the tilt direction side, and a focus adjustment pattern is formed in the focus adjustment pattern forming area.

A liquid crystal device comprising: a first lens array that is provided to be closer to a light incident side of the liquid crystal device than the light shielding portion, a second lens array that is provided between the first lens array and the light shielding portion. The second lens array includes a plurality of first lenses each of which has a surface convex toward the light shielding portion, and the second lens array includes a first slit which is provided between two first lenses adjacent to each other among the plurality of first lenses of the second lens array so as to extend toward the light shielding portion.

Provided by the present technology is an illumination apparatus including a light source section, a phase modulation section, and a control section. The light source section has a light emitting element. The phase modulation section performs spatial light phase modulation on incident light from the light source section. The control section controls the phase modulation section in such a manner that a plurality of domains formed by dividing a phase modulation plane of the phase modulation section reproduces a light intensity distribution based on a common phase distribution determined on the basis of a Freeform method in a common region on a projection plane.