Abstract: A handheld electronic device is provided. The handheld electronic device comprises a main body, a processing unit, an image projection module, a motion sensor, a first light sensor and a second light sensor. The processing module is disposed in the main body to generate display data. The image projection module generates a projection image according to the display data. The motion sensor senses an orientation of the handheld electronic device. The first and second light sensors sense an ambient light. The processing unit generates the display data according to the ambient light sensed by the first light sensor when the processing module determines that the orientation is a first orientation and according to the ambient light sensed by the second light sensor when the processing module determines that the orientation is a second orientation.

Abstract: An illumination optical system includes: a light source emitting light of a first wavelength; a fluorophore unit; an optical element and a quarter-wave plate between the optical element and the fluorophore unit. The fluorophore unit has a reflection region and a fluorophore region that gives off fluorescent light of a different wavelength than the first wavelength when irradiated by light of the first wavelength. The fluorophore unit is able to move such that the light from the light source sequentially irradiates the fluorophore region and the reflection region. The optical element separates the light of the first wavelength into a first linearly polarized light component and a second linearly polarized light component that is orthogonal to the first linearly polarized light component.

Abstract: An image processing device includes: a transformation ratio calculation unit which calculates transformation ratio of an image after transformation, the image after transformation being obtained by transforming an original image under predetermined rule; a filter coefficient calculation unit which calculates filter coefficients based on the transformation ratio; and a pixel value calculation unit which calculates the pixel value of each pixel in the image after transformation using the filter coefficients and outputs the pixel value of the image after transformation as image data after transformation.

Abstract: A multimedia player for providing two projection images is provided. The multimedia player for displaying two projection images includes: a first projection unit displaying a first projection image; and a second projection unit displaying a second projection image. The first projection unit includes: a first driving unit controlling an operation of the first projection unit and providing an image signal on the first projection image to be displayed; a first light source unit; a first light modulation device outputting the first projection image by modulating light provided from the light source in response to the image signal of the first projection image; and a first projection lens unit magnifying and projecting an image that is output from the first light modulation device. The structure of the first projection unit is the same as that of the second projection unit. The multimedia player further includes a screen sensing unit sensing a color of an area in which an image is to be displayed.

Abstract: A driving device adapted to drive a discharge lamp including first and second electrodes adapted to generate discharge light, a primary reflecting mirror disposed on a side of the second electrode and adapted to reflect the discharge light, a secondary reflecting mirror disposed on a side of the first electrode and adapted to reflect the discharge light. The driving device includes: a deterioration detection section adapted to detect a degree of progression of deterioration in the first and the second electrodes; and a deterioration handling section adapted to increase first anode power energy, which is supplied while the first electrode acts as an anode, in accordance with the degree of progression of the deterioration detected by the deterioration detection section.

Abstract: An image display apparatus which displays an image as a transmitted projection image includes: a tread-board of a step which has a first projection surface and transmits a projection image projected on the first projection surface; and a cross-board of the step which has a second projection surface and transmits a projection image projected on the second projection surface.

Abstract: Methods and apparatus for projecting a tangible image of data characterizing an object onto a surface of the object itself. Three-dimensional measurements of the object are obtained, the measurements are processed for projection, and a tangible image is projected onto the object, the image conveying information based on the three-dimensional measurements. The image may be projected concurrently with performance of measurements. In an exemplary dental context, information derived in part from three-dimensional measurements of a tooth or replica may be projected onto the actual tooth or replica. In interactive application, a work piece is be measured during the course of fabrication, and three-dimensional information, derived from contemporaneous non-contact measurement, is projected onto the work piece in order to direct the user with the formation of the work piece.

Abstract: A portable video projector includes facility to direct a projected image field along an axis in an alignment corresponding to the state of an optical element.

Abstract: A digital light processing display system is provided with fewer major moving parts and a smaller form factor. A high-intensity, high-frequency strobe light is used to direct a pulse of light through colored filters. The colored pulses of light are passed through separate prisms, each with a high index of refraction. The index of refraction and the length of the path through the prism result in a delay for each color. For each pixel with a component of the color for each colored pulse, a controller activates the corresponding mirror in an array of mirrors. The timing of the activation of the mirrors is coordinated with the timing of the colored pulses of light to form a full color image.

Abstract: A spatial light modulator is disclosed, along with methods for making such a modulator. The spatial light modulator comprises an array of micromirrors each having a hinge and a micromirror plate held via a hinge on a substrate, the micromirror plate being attached to the hinge such that the micromirror plate can rotate along a rotation axis and the hinge structure is located between the micromirror plate and the light source. The mirror plate is formed between the hinge and the substrate on which the hinge is formed. As a result, the hinge is exposed to the incident light during the operation.

Abstract: A compact rear projection image display apparatus in which the projection distance in a projection optical system is substantially reduced and no reflection mirror is used, thereby eliminating a major cause of image trapezoidal distortion. The rear projection image display apparatus has a projection lens system which includes a first lens group with positive refractive power and a second lens group which further enlarges an image enlarged by the first lens group. The projection lens system enlarges and projects an image displayed on an image display device, on a transmission screen. No reflection mirror is provided between the second lens group and the transmission screen and the image enlarged by the second lens group is directly projected on the transmission screen.

Abstract: An information handling system projector lamp housing includes a safety interlock to reduce the risk of electrical shock to an end user during lamp insertion and removal. A ballast disposed in the projector interfaces with a low voltage power supply through a ballast power supply circuit and transforms the low voltage into high voltage for use by the lamp. A connector associated with the ballast connects with a connector on the lamp housing to supply the high voltage to the lamp. The safety interlock breaks the ballast power supply circuit if the ballast connectors are exposed, such as during insertion or removal of the lamp. The safety interlock completes the ballast power supply circuit as the lamp housing fully inserts in the projector to allow power supply for illumination of the lamp.

Abstract: The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-back mirror (7) for turning back halfway a light beam projected from the projection lenses, and a drive circuit for displaying an image on the image display element, that are fixedly housed within a housing (5). When a diagonal size of the transmission type screen (6), the depth of the housing (5), and the length from a lower end of the screen (6) to a lower end of the housing (5), are assumed to be SS (inch), D (inch), and L (inch), respectively, the following conditions are satisfied: SS >40, D?SS/3.0, L?SS/10.9.

Abstract: A method of projecting a compensated principal image may include projecting a principal image onto a surface and projecting an intended calibration image onto a calibration area of the surface. The intended calibration image may be projected when the principal image is not projected onto the calibration area. The calibration image displayed on the surface is received and compared to the intended calibration image to determine an observed difference. Projection of the principal image is modified based on the observed difference.

Abstract: An image projection lighting device is provided which includes a variable homogenizing system. The variable homogenizing system may homogenize light projected by a lamp across a light valve. The variable homogenizing system may vary the light across the light valve from an existing state to a first state or from an existing state to a second state. The variable homogenizing system may be comprised of one or more lens arrays, which may be comprised of cylindrical or spherical lenses.

Abstract: A large screen emissive display operating at atmospheric pressure includes pixels, the red, green, and blue subpixels of which are excited by UV laser light scanned onto the subpixels by a pixel activation mechanism. The pixel activation mechanism includes three grating light valves (GLVs) that are controlled by a processor in response to a demanded image to modulate the UV light as appropriate to produce the demanded image.

Abstract: An optical unit (20, 30) for color projection display system that has three SLMs (21, 31) and three projection lenses (27, 37). Each SLM (21, 31) receives light of a different primary color, which it modulates to form images for that color. Each SLM (21, 31) and its associated projection lens (27, 37) provides a “channel” for that color of the final image, with the channels being converged out of the projection lenses (27, 37) to the viewing screen.

Abstract: An arrangement is disclosed for cutting off intensive radiation in projectors and/or illumination devices whose projection head, which projects the light, is mounted in a receptacle or holder rotatable about an azimuth axis so as to be swivelable about an additional axis arranged vertical to the azimuth axis. It comprises a cutoff mechanism which comprises a coupling member, and light-absorbing means or cutoff means, which is fixedly connected with the receptacle and which is rotatable jointly with the latter and with the projection head about the azimuth axis, wherein the light-absorbing or cutoff means are positioned in the cutoff position in front of the light outlet opening of the projection head or of an objective or in an intermediate image plane located within the projection head. The arrangement is suitable for application particularly with projection of image contents on plane, arched, or curved projection surfaces.

Abstract: A projection system and a method of displaying a projected input image on a projection screen of the system utilize one or more reconfigurable holographic optical elements (HOEs) to optically manipulate propagating light in the system. The reconfigurable HOEs may be configured to perform simple optical functions that are commonly associated with traditional optical devices, such as lenses, prisms and mirrors. However, the reconfigurable HOEs may also be configured to perform sophisticated optical manipulations, such as varying the light intensity toward a specific direction and generating virtual (holographic) images. Each reconfigurable HOE includes a hologram that is sandwiched between two electrode layers. The hologram is a holographic photopolymeric film that has been combined with liquid crystal. The hologram has an optical property that changes in response to an applied electrical field.

Abstract: The present invention is directed to a liquid crystal projector comprising a light source for emitting white light, a separation mechanism for separating the white light into light beams with a plurality of colors at different angles, a liquid crystal panel for giving the light beams optical modulation, a lens mechanism for converging the light beams so that the light beams are incident upon respective pixels of the liquid crystal panel, a mechanism for magnifying and projecting the light beams emergent from the liquid crystal panel, and a moving mechanism for moving an incident position of the light beams on the liquid crystal panel an amount of an integer times a pitch between the pixels.

Abstract: A liquid crystal projector using monochromatic liquid crystal displays (LCDs). The liquid crystal projector includes a filter for filtering light emitted from a light source and for outputting a white light. A condenser lens group then condenses the white light, and, thereafter, the condensed white light is separated into the three primary colors of light by (color filters and applied to an LCD part comprising monochromatic LCDs. The LCD part outputs video images corresponding to the three primary colors of light separated according to an applied video signal. A reflective part their combines the outputted video images and outputs the combined video image to a projector lens. Finally, the projector lens projects the combined video image onto a screen.

Abstract: A toy projector (10) is equipped with a light source (11), a non-light-transmitting member (13) having at least one light-transmitting part (14) which transmits the light from the light source (11), a member (15) having light-transmitting designs provided in a direction other than the direction in which the light-transmitting portion (14) has been placed with respect to the light source (11) , a mirror (19) reflecting the said design, and a lens (17) arranged between the said mirror (19) and the member (15) having the said design. The light from the said at least one light-transmitting part (14) and the design reflected by the said mirror (19) are projected on to the same surface.