A light source device is provided in which the number of LD chips can be easily optimized and that has a high light utilization efficiency. The light source device includes a first light source unit that emits a first monochromatic light, a second light source unit that emits a second monochromatic light of the same color as the first monochromatic light, an optical member that splits the first monochromatic light emitted by the first light source unit into a first split light and a second split light and that integrates the first split light and the second monochromatic light emitted by the second light source unit into one optical path, and a phosphor unit that receives the second split light or the integrated light to emit fluorescent light.

A method for pairing a key fob with a control unit is provided. The key fob executes an ID authenticated key agreement protocol with a pairing device based on a key fob identification to authenticate one another and to generate a first encryption key. The pairing device encrypts a control unit identification using the first encryption key. The key fob receives the encrypted control unit identification transmitted from the pairing device. The key fob then executes an ID authenticated key agreement protocol with the control unit based on the control unit identification to authenticate one another and to generate a second encryption key. The key fob then receives an operational key transmitted from the control unit that is encrypted with the second encryption key.

A light source system and a projection system, comprising a light source; a switching system switching light emitted by the light source into at least two light beams having a preset proportion in the manner of time division or light intensity division; a color wheel assembly located in a transmission light path of each light beam of the at least two light beams, with the color wheel assembly generating light having different colors and a preset proportion under the irradiation of each light beam of the at least two light beams, and light of different colors being able to synthesize a projection image after being modulated by a light modulation system, wherein the switching system can adjust the proportion of the at least two light beams according to the parameters of the projection image, so as to adjust the proportion of the light of different colors.

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.

A display device includes: a projection unit configured to emit light depending on a first picture signal, the first picture signal including three primary color signals; a display unit configured to include a transmissive liquid crystal panel, a polarizing plate, and a screen, the transmissive liquid crystal panel changing a polarizing direction of each of three primary color lights from the projection unit, depending on a second picture signal including three primary color signals; and a display control unit configured to generate the first picture signal and the second picture signal from an input picture signal including three primary color signals, and configured to output a picture signal for controlling the projection unit based on the first picture signal and controlling the transmissive liquid crystal panel based on the second picture signal.

A display device includes: a projection unit that emits light depending on a first picture signal, the first picture signal including three primary color signals; a display unit that includes a screen, a transmissive liquid crystal panel, and a polarizing plate, the transmissive liquid crystal panel changing a polarizing direction of each of three primary color lights from the projection unit, depending on a second picture signal including three primary color signals; and a display control unit that generates the first picture signal and the second picture signal from an input picture signal including three primary color signals, and that outputs a picture signal for controlling the projection unit based on the first picture signal and controlling the transmissive liquid crystal panel based on the second picture signal.

Some embodiments provide for a modular video projector system having a light engine module and an optical engine module. The light engine module can provide narrow-band laser light to the optical engine module which modulates the laser light according to video signals received from a video processing engine. Some embodiments provide for an optical engine module having a sub-pixel generator configured to display video or images at a resolution of at least four times greater than a resolution of modulating elements within the optical engine module. Systems and methods for reducing speckle are presented in conjunction with the modular video projector system.

To provide an image display device capable of remediation of color breakup, and an electronic device including the image display device. An image display device includes: a first display panel whose transmittance or reflectance of light is controlled on the basis of a first video signal; a second display panel whose transmittance or reflectance of light is controlled on the basis of a second video signal; a light irradiation unit configured to irradiate the first display panel with color light according to the first video signal for driving the first display panel, and to irradiate the second display panel with color light according to the second video signal for driving the second display panel; and a control unit configured to generate the first video signal corresponding to first color light that is one among red color light, green color light, and blue color light, and generate the second video signal that causes emission of second color light that brings the first color light close to white light.

A projection device includes: a projection unit configured to project image light to a projection target; an image-capturing unit configured to capture an image of a range including the projection target to generate a captured image; a communication unit; and a control unit configured to transmit the captured image to an information processing device by the communication unit and cause a reception image received by the communication unit from the information processing device to be projected by the projection unit. The projection unit includes an image light forming unit configured to form image light and a projection optical system configured to project the image light formed by the image light forming unit toward the projection target. The image-capturing unit includes an imaging element configured to receive light through the projection optical system.

A light source apparatus according to the present disclosure includes a first light source including a plurality of first light emitters arranged in a single row along a first direction, a second light source including a plurality of second light emitters arranged in a single row along a second direction, and a polarization combiner. The polarization combiner transmits the first luminous flux from the first light source and reflects the second luminous flux from the second light source. In an imaginary plane perpendicular to the center axis of the combined luminous flux, the direction in which the plurality of first beams are arranged in the single row and the direction in which the plurality of second beams are arranged in the single row intersect with each other, and the first luminous flux and the second luminous flux partially overlap with each other.