A light source device according to an embodiment of the present disclosure includes: a first light source section that emits light in a first wavelength region; a wavelength conversion section that is disposed on an optical path of the light in the first wavelength region, and is excited by the light in the first wavelength region emitted from the first light source section to emit light in a second wavelength region different from the first wavelength region; a polarization separation element that is disposed between the first light source section and the wavelength conversion section, and separates incident light on the basis of polarization; and a color separation element that is disposed between the first light source section and the polarization separation element, and separates incident light on the basis of a wavelength region.

An electronic apparatus projecting an image is disclosed. The electronic apparatus includes a main body, a projector, a plurality of sensors including an acceleration sensor that detects a sensing value, and a plurality of distance sensors that detect a distance value between the electronic apparatus and a screen, a support connected to the main body, and a processor configured to identify a vertical angle by which the electronic apparatus is tilted, based on a sensing value detected by the acceleration sensor, identify a rotation angle by which the electronic apparatus is rotated based on a distance value detected by the plurality of distance sensors, perform a function corresponding to a keystone correction on an image to provide a modified image, identify a size of the modified image based on the vertical angle or the rotation angle, and control the projector to project the modified image based on the size of the modified image.

The present disclosure describes a projector which has: an image projection portion; an image provision portion that provides a projection image to the image projection portion; a deviation movement detection portion that detects a deviation movement of the image projection portion; and an image process portion that based on detection by the deviation movement detection portion, shifts the image provided by the image provision portion in a direction where the deviation movement is corrected. According to this, even if an image projection function does not include a deviation correction function, it is possible to perform the deviation correction by means of the image process.

A control device for controlling a switching converter includes a switch controller that generates a control signal with a switching period for controlling switching of a switch of the switching converter and setting a first interval in which a current flows in the switch, a second interval in which energy is transferred onto a storage element of the switching converter, and a third, wait, interval, at the end of the second interval. The duration of the first interval is determined based on a control voltage indicating the output voltage. A pre-distortion stage receives the control voltage and generates a pre-distorted control voltage as a function of the control voltage and a relationship between one of the first and third time intervals and the switching period, wherein the switch controller is configured to control a duration of the first interval based on the pre-distorted control voltage.

A micro-electro-mechanical device, wherein a platform is formed in a top substrate and is configured to turn through a rotation angle. The platform has a slit and faces a cavity. A plurality of integrated photodetectors is formed in a bottom substrate so as to detect the light through the slit and generate signals correlated to the light through the slit. The area of the slit varies with the rotation angle of the platform and causes diffraction, more or less marked as a function of the angle. The difference between the signals of two photodetectors arranged at different positions with respect to the slit yields the angle.

A projector for generating a frame of an image is disclosed, comprising an array of elements arranged in a plane, each element comprising at least three LEDs which have different respective colours, and an array of collector structures, each configured to receive light from a single LED at any one time and reduce the angle over which the LED emits light. A projector unit is configured to receive the light from the array of collector structures and collimate the light such that a full colour frame is formed from combining a plurality of subframes formed through a spatial movement of the array of elements with respect to the array of collector structures such that each collector structure receives light from a different LED during each subframe, and/or a displacement of the light emitted from each LED such that the light from each LED illuminates multiple pixels of the frame.

Examples are disclosed that relate to a compact optical systems comprising SLMs. One example provides a projection system comprising an illumination stage including a light emitting diode (LED) array. The LED array comprises a plurality of red LEDs, a plurality of green LEDs, and a plurality of blue LEDs. The illumination stage further comprises an illumination stage optical system configured to control an angular extent of light emitted by the LED array and homogenize the light emitted by the LED array. The projection system further comprises an image forming stage configured to form an image from light output by the illumination stage, the image forming stage comprising a spatial light modulator (SLM) configured to spatially modulate the light output by the illumination stage to form an image, and one or more projection optics configured to project the image formed by the spatial light modulator.

A projection system includes an illumination light source configured to emit an illumination light beam, a monitor light source configured to emit a monitor light beam, and a projector configured to project both the illumination light beam and the monitor light beam into a projected combined light beam. A first portion of the projected combined light beam is propagated over a first beam path in a first direction, causing an eye of a user to see a display image. A second portion of the projected combined light beam is propagated over a second beam path in a second direction, causing a monitor camera to capture a monitor image. The monitor image is analyzed to determine an orientation or a position of the monitor image. In response to determining that the monitor image is not properly oriented or positioned, an orientation or position of the projector or the illumination image is adjusted.

The laser projection apparatus includes a laser source, an optical engine and a projection lens. The laser source includes a base plate, a plurality of light-emitting components and a reflecting portion. The plurality of light-emitting components include a first light-emitting component and a second light-emitting component. The polarization direction of the laser beam emitted by one of the first light-emitting component and the second light-emitting component is parallel to the base plate, and the polarization direction of the laser beam emitted by another of the first light-emitting component and the second light-emitting component is perpendicular to the base plate. The reflecting prism is configured to change a polarization polarity of one of the laser beam with the polarization direction perpendicular to the base plate or the laser beam with the polarization direction parallel to the base plate.

A hand lifting device and a projection apparatus are provided. The hand lifting device is adapted to carry an object, and includes a support pad and a carrying strap. The support pad has a first surface and a second surface opposite to each other, and has two first connecting portions. The carrying strap has two end portions, and the two end portions respectively have a second connecting portion. The carrying strap is configured to partially surround the object, such that the second connecting portions of the carrying strap are respectively detachably connected to the first connecting portions of the support pad. The projection apparatus comprises the above hand lifting device and a projector.