Light projection systems and methods may comprise combining light from two or more projectors. Each projector may be controlled so that the combined light output of the projectors matches a target for the projected light. In some embodiments optimization is performed to generate image data and control signals for each of the projectors. Embodiments may be applied in image projecting applications, lighting applications, and 3D stereoscopic imaging.

An image projector includes a spatial light modulator (SLM) with a two dimensional array of pixel elements controllable to modulate a property of light transmitted or reflected by the pixel elements. An illumination arrangement delivers illumination to the SLM. A collimating arrangement collimates illumination from the SLM to generate a collimated image directed to an exit stop. The illumination arrangement is configured to sequentially illuminate regions of the SLM, each corresponding to a multiple pixel elements. A controller synchronously controls the pixel elements and the illumination arrangement so as to project a collimated image with pixel intensities corresponding to a digital image.

A multiplexed light field projector device and a multiplexed light field display to output a light field image is described. The projector has a projector base with a projection optical system configured to output light rays to form a projected image, a collimating optical system configured for collimation of the projected image light rays to form a second projected image, which is directed to a display optical system to produce a light field image. Light field projector devices or alternative projector devices may be used individually or in combination with one or more other projectors which can be arranged to form a multiplexed direct projection light field display. The arrangement of projector devices may have an individual or shared display optical system.

A projection apparatus projects an image on a screen based on input data including information on absolute luminance. The projection apparatus includes: a peak luminance value acquisition unit configured to acquire a peak luminance value on the screen when the projection apparatus projects an image on the screen at a maximum output gradation value; a reference luminance value setting unit configured to set a reference luminance value to be higher than the peak luminance value; a relation information setting unit configured to set, based on the reference and peak luminance values, relation information indicating a relation between an output gradation value and a light output value for displaying an output image; an output gradation value setting unit configured to set an output gradation value based on the input data and the relation information; and an output control unit configured to output an image based on the output gradation value.

Image display apparatus and methods may use a single imaging element such as a digital mirror device (DMD) to spatially modulate plural color channels. A color channel may include a light steering element such as a phase modulator. Steered light from a light steering element may be combined with or replaced by additional light to better display bright images. These technologies may be provided together or applied individually.

An illumination system including a light source, a wavelength conversion device and a first light-uniforming element is provided. The light source emits an excitation beam. A light wavelength conversion region and a transmission region of the wavelength conversion device sequentially insert on the transmission path of the excitation beam at different time periods. When the light wavelength conversion region inserts on the transmission path of the excitation beam, a conversion beam is provided. When the transmission region inserts on the transmission path of the excitation beam, a non-conversion excitation beam is provided. The non-conversion excitation beam and the conversion beam penetrate the first light-uniforming element to form an illumination beam. The conversion beam is reflected for X time(s) and the non-conversion excitation beam is reflected for Y time(s) on the transmission path between the wavelength conversion device and the first light-uniforming element. A projection apparatus is also provided.

In a pixel circuit including a first capacitance element and a second capacitance element, in a writing sub-frame, a voltage corresponding to a gray scale level is held in a first capacitance element, a plurality of OLEDs are off in a vertical scanning line flyback period after the writing sub-frame, and in a light-emitting sub-frame after the vertical scanning line flyback period, a current corresponding to the voltage held in the first capacitance element is supplied to the OLED, and the voltage corresponding to the gray scale level is held in the second capacitance element. In an optical path shifting element, an optical path is shifted in the vertical scanning line flyback period, and in the light-emitting sub-frame, the optical path is stabilized.

A signal detection device of the present invention includes a first control unit configured to determine whether there are inputs of a plurality of external signals connected thereto, a second control unit configured to be activated after the first control unit is activated, a first input unit connected directly to the first control unit and configured to input a first external signal, which is one type of the plurality of external signals, and a second input unit connected to the first control unit via the second control unit and configured to input a second external signal, which is another type of the plurality of external signals, and the first control unit determines whether there is an input of the first external signal before the second control unit is activated and determines whether there is an input of the second external signal after the second control unit is activated.

An image display system includes a projector projecting image light onto a projection surface, at least one camera picking up at least one image of the projection surface and thus acquiring at least one picked-up image, at least one microphone detecting a sound generated in an image pickup range of the camera, and a control device controlling a position or an orientation of an image displayed on the projection surface by the image light, based on the at least one picked-up image, when a target sound is detected based on the sound.

A projection system according to an embodiment of the present technology includes an image formation apparatus, a projection lens, a measurement apparatus, a control apparatus, and a measurement assisting apparatus. The image formation apparatus forms image light. The projection lens projects the image light. The measurement apparatus measures the image light. The control apparatus controls the image formation apparatus on the basis of output of the measurement apparatus. The measurement assisting apparatus is disposed between the image formation apparatus and the projection lens and is configured to be capable of selectively switching between a first state to cause the image light to enter the projection lens and a second state to cause the image light to enter the measurement apparatus.