Abstract: A cam roller is engaged with a first engaged surface facing downward in a lifting and lowering direction of a cap and moves so as to follow the rotation trajectory about a shaft in the upward direction approaching a liquid ejecting head and in the downward direction separating from the liquid ejecting head. In addition, in the lifting and lowering direction of the cap, the cam roller is engaged from above with a second engaged surface which faces upward at a position lower than the first engaged surface and the first engaged surface has a plane portion as a non-overlapped area which does not overlap the second engaged surface in a direction perpendicular to both of the lifting and lowering direction and the direction of the shaft in a range that the cam roller follows the rotation trajectory about the shaft.

Abstract: A recording apparatus including: a recording portion configured to record an image on a recording medium; an annular conveyance member having a face opposed to the recording portion, the face being capable of moving in a circumferential direction of the annular conveyance member while supporting the recording medium to convey the recording medium; and a first wiper configured to wipe the face by moving relative to the face, while contacting the face, in an intersecting direction that intersects the circumferential direction, wherein the face has a first area as a part of the face, the first area being an area at least a part of which is wiped by the first wiper, the first area having a grinding mark extending in the intersecting direction.

Abstract: An image forming apparatus includes a recording head configured to have a nozzle face on which nozzles that discharge liquid droplets are formed; a cap configured to cap the nozzle face of the recording head; a discharge path configured to be connected to the cap; a suction pump configured to be provided in the discharge path and be made of a tube pump; and an atmosphere opening part configured to open an airtight space, created when the nozzle face is capped by the cap, to the atmosphere. The atmosphere opening part is configured to communicate with the inside of the cap at a position higher than a surface of liquid discharged into the cap, and a check valve configured to prevent a flow of the liquid toward the cap from the suction pump is provided in the discharge path.

Abstract: There is provided an image recording apparatus including: a casing; a carriage unit which is movable in the casing in a scanning direction intersecting with a transporting direction of a medium; a liquid jetting head mounted on the carriage unit; and a controller which controls the carriage unit and the liquid jetting head so that the carriage unit reciprocates within a predetermined range in the scanning direction under a condition that the liquid jetting head jets the liquid to the medium, and that the carriage unit moves to a cartridge exchange position under a condition that the mounted liquid cartridge is to be changed, the cartridge exchange position being adjacent to the exchange port and being located outside the predetermined range in the scanning direction.

Abstract: A micro-fluid ejection head for a printer is disclosed. The micro-fluid ejection head comprises a plurality of printhead modules. Each of the plurality of printhead modules comprises an ejection chip for ejecting fluid. The micro-fluid ejection head further comprises a support frame to mount the plurality of printhead modules for creating a lengthy array of the plurality of printhead modules. The support frame is electrically coupled with the plurality of printhead modules for allowing the plurality of printhead modules to receive data and electrical power.

Abstract: According to one embodiment, an inkjet head includes a nozzle plate, a base member, a frame-like member, an ink chamber, a supply channel and a discharge channel. The nozzle plate includes nozzles. The base member includes driving elements that cause the ink to be ejected from the nozzles, and is opposed to the nozzle plate. The frame-like member is interposed between the nozzle plate and the base member and includes first opening parts and a second opening part extending over all the first opening parts. The ink chamber is provided inside the frame-like member and communicates with the ink chamber. The supply channel is provided in the base member and communicates with the ink chamber to supply ink. The discharge channel is provided in the base member, communicates with the ink chamber to discharge ink, and is connected to the first opening parts through the second opening parts.

Abstract: A structure for an inkjet printhead is disclosed. The printhead structure has an elongate support structure for supporting a printhead integrated circuit, and ink conduits formed in the elongate support structure for supplying ink to an array of nozzles of the printhead integrated circuit. Each ink conduit includes cavities distributed along a roof of the ink conduit. An opening to each cavity has an upstream edge and a downstream edge. The upstream edge contacts the ink before the downstream edge during initial priming of the ink conduits from an ink supply. The upstream edge has a transition face between the ink conduit and the cavity interior, the transition face being configured to inhibit ink from filling the cavity by capillary action during initial priming of the ink conduit. This causes gas to be trapped within the cavity. The gas acts to compress pressure pulses in the ink.

Abstract: A sub-carriage includes a first head mounting portion and a second head mounting portion. The second head mounting portion includes at least a portion of constitution members of an adjustment mechanism which adjusts a position of the second head, a first recording head of one side of the same set is fixed in a state of being positioned to the first head mounting portion so that the nozzles are disposed in a defined position, and a second recording head of the other side is fixed to the second head mounting portion in a state where the relative position to the first recording head is defined by the adjustment mechanism based on a landing position in a recording medium of ink ejected from predetermined nozzles of the second recording head with respect to a landing position in a recording medium of ink ejected from predetermined nozzles of the first head.

Abstract: An inkjet print head including a substrate and a first film member stacked on the substrate to form an ink path, and a manufacturing method thereof. The first film member includes a path-defining layer made of a photosensitive material and formed with the ink path, and an adhesive layer made of a photosensitive material and used to stably bond the path-defining layer to the substrate. With this configuration, the path-defining layer and the adhesive layer can be simultaneously stacked on the substrate and also, can be patterned simultaneously.

Abstract: A nozzle assembly for an inkjet printhead. The nozzle assembly includes: a nozzle chamber including a roof having a nozzle opening and a moving portion movable relative to a stationary portion of the roof. An actuator is configured to displace the moving portion relative to the stationary portion and cause ejection of ink through the nozzle opening. A polymeric coating covers the moving portion and the stationary portion. The polymeric coating is absent from a gap between the moving portion and the stationary portion.

Abstract: The method of manufacturing a nozzle plate which includes a nozzle having a tapered section and a linear section includes the steps of: forming an etching stopper layer for stopping dry etching of a silicon substrate, on a first surface of the silicon substrate; forming a mask layer on a second surface of the silicon substrate reverse to the first surface; performing a first patterning process with respect to the mask layer so that an opening section is formed in the mask layer; carrying out the dry etching of the silicon substrate through the opening section in the mask layer so that the tapered section of the nozzle is formed in the silicon substrate; carrying out dry etching of the etching stopper layer through the opening section in the mask layer so that at least a part of the linear section of the nozzle is formed in the etching stopper layer; and removing the mask layer.

Abstract: A printhead module is provided for an inkjet printhead assembly. The printhead module includes a support. An elongate carrier is mounted to the support. The carrier defines a plurality of transverse ribs and an ink channel located between the ribs. A subassembly includes a micro-electromechanical integrated circuit (IC) configured to eject ink. The subassembly is mounted to the carrier so that the support, carrier and subassembly define a plurality of sealed ink chambers which can feed ink to the IC via the ink channel.

Abstract: A liquid discharge head includes: a recording element substrate and a plurality of electric connection units; and an electric wiring member that includes a plurality of input terminals, a plurality wirings held between films and electrically connected to the plurality of input terminals, and a plurality of lead lines conducted to the plurality of wirings. In this case, the plurality of wirings include a power line for supplying power to the energy generation elements and a signal line for supplying a signal to the energy generation elements. Relationships of A>B and B<D are satisfied, in which A is a largest width of the signal line, B is a largest width of the lead line connected to the signal line, and D is a largest width of the lead line connected to the power line.

Abstract: An ink-jet recording apparatus includes a recording head which jets inks, and a cable which is connected to the recording head and which is provided with a driving circuit for applying a driving voltage of the recording head. The recording head is formed with nozzle arrays for jetting an ink of a dark color and an ink of a light color respectively. The nozzle array, which jets the ink of the dark color, is disposed farther from the driving circuit than the nozzle array which jets the ink of the light color. The nozzle array, which jets the ink of the dark color, is hardly affected by the heat from the driving circuit. Therefore, the deterioration of the recording quality, which would be otherwise caused by the disturbance of ink discharge from nozzles, is suppressed.

Abstract: A liquid ejection head includes an ejection element substrate having an energy generating element, an ejection orifice for ejecting a liquid, and a liquid supply port communicatively connected to the ejection orifice; and a support member supporting the ejection element substrate and having a liquid guide path for supplying the liquid to the liquid supply port. The support member is formed by baking a laminate including at least one guide path plate having a through-hole for constituting a part of the liquid guide path, a filter plate having an opening for disposing a filter member for filtering the liquid, and a filter member disposed in the opening.

Abstract: A liquid ejection head including a piezoelectric actuator is disclosed. The piezoelectric actuator is manufactured by the following steps: carrying out a first heat treatment of a diaphragm of stainless steel containing iron, chromium and aluminum, in a gas containing oxygen, so as to form an aluminum oxide film on a first surface of the diaphragm and form a chromium oxide film between the aluminum oxide film and the first surface of the diaphragm; forming a lower electrode on the aluminum oxide film; forming a piezoelectric body on a surface of the lower electrode reverse to a surface of the lower electrode on which the chromium oxide film and the aluminum oxide film are formed; forming an upper electrode on a surface of the piezoelectric body reverse to a surface of the piezoelectric body on which the lower electrode is formed; and calcining the piezoelectric body by carrying out a second heat treatment of the diaphragm with which the piezoelectric body is provided.

Abstract: A liquid supply apparatus configured to supply a liquid for a liquid-consuming apparatus, includes: a liquid container including a storage chamber which stores the liquid and an engaging portion which is provided on an outer surface of the liquid container; and an attaching section to which the liquid container is attachable, which is formed with an opening, and which includes: a holding member configured to have an attitude which is changable between a first attitude and a second attitude; a cover configured to selectively have an open attitude for opening the opening and a close attitude for closing the opening; and a closing-preventive member on the cover and configured to prevent the cover from having the close attitude when the holding member has an attitude different from the first attitude.

Abstract: A manufacturing method produces a liquid ejecting head including first and second flow path members having liquid flow paths that communicate with each other. An integrally-molded member is surrounds the second flow path member on the second flow path member side of the first flow path member to join the first and second flow path members together. A holding process defines a space portion for forming the integrally-molded member in a frame section. The frame section is brought into contact with a contact surface of a recessed portion in the face of the second flow path member opposite the first flow path member, with the first and second flow path members contacting each other such that the liquid flow paths communicate with each other. A molding process fills the space portion with resin, thereby molding the integrally-molded member, and joins the first and second flow path members together.

Abstract: According to one embodiment, an inkjet device includes: an ink circulating device configured to communicate with an inkjet head to form an ink circulating system; an arithmetic unit configured to calculate, on the basis of pressure detected from the ink circulating system, pressure in an ink discharge port section according to an arithmetic expression set in advance; a pressure determining unit configured to determine, with proper nozzle pressure in the ink discharge port not discharging ink set as a reference value, whether a value calculated by the arithmetic unit is positive pressure or negative pressure with respect to the reference value; and a negative pressure regulator configured to communicate with the ink circulating system and perform, if the pressure determining unit determines that the value is the positive pressure, an ink reducing operation in the ink circulating system and increase a negative pressure value on the ink discharge port.

Abstract: An ink pressure regulator for regulating a hydrostatic pressure of ink supplied to an inkjet printhead. The regulator includes an ink chamber having an ink outlet for fluid communication with the printhead via an ink line. A roof of the ink chamber includes: an air inlet; a regulator channel having a first end communicating with the air inlet and a second end communicating with a headspace of the chamber; and a liquid-retaining structure in fluid communication with the regulator channel. The liquid-retaining structure is positioned and configured for capturing ink from the headspace of the ink chamber. The regulator channel is dimensioned to regulate a hydrostatic pressure of the ink supplied to the printhead.

Abstract: An inkjet printer includes: an inkjet printhead; an ink reservoir containing a supply of ink; and a pressure-regulating chamber for maintaining ink contained therein at a predetermined first level. The chamber includes: an inlet port connected to the ink reservoir via an ink supply line; an outlet port connected to an ink inlet of the printhead via an upstream ink line; an air vent open to atmosphere; and a float valve for maintaining the predetermined first level of ink. The float valve includes: an arm pivotally mounted about a pivot; a float mounted at one end of the arm; and a valve stem attached to the arm, said valve stem having a valve head for closure of a valve seat, the valve seat being positioned at the inlet port of the pressure-regulating chamber.

Abstract: A cartridge for a printer is provided having a body defining a number of fluid reservoirs, a lid covering the body to seal fluid inside the reservoirs, and a printhead operatively fed with fluid from the reservoirs. A base of each reservoir is provided with a raised portion which surrounds a fluid outlet through which fluid flows for supply to the printhead. Each raised portion being molded in the body to separate the outlet from the base of each reservoir to ensure a sufficient flow rate of fluid from the reservoir.

Abstract: An ink composition including one or more oxazoline compounds or oxazoline derivatives having either crystalline, amorphous or even semi-crystalline properties for use in a particular printing application, such as in a direct-to-paper print process.

Abstract: An inkjet printer includes a printhead for printing onto a media substrate, the printhead defining a plurality of nozzles from which ink is expelled; an ink tank provided upstream of the printhead; a sump provided downstream of the printhead for collecting unused ink from the printhead, the sump having a lower portion for holding the unused ink and an upper portion defining a headspace of air above the unused ink; a first fluid conduit extending between the printhead and the sump for communicating the unused ink from the printhead to the sump, the first fluid conduit connecting the sump to a position in the printhead upstream of the plurality of nozzles; and a pump connected to the sump, the pump for drawing air from the headspace of the sump into atmosphere and effecting a negative pressure in the printhead upstream of the nozzles. Communication of ink from the ink tank to the printhead is effected by the negative pressure generated by the drawing of air from the headspace of the sump.

Abstract: An inkjet recording device, wherein air can be retained in an ink supply pipe by using a simple structure without applying substantial changes to the inkjet recording device, a variation in an ink supply pressure is mitigated by the retained air, and ink can be ejected with high stability. An inkjet recording device is provided with an inkjet head for ejecting ink, an ink flow path for supplying the ink, which is supplied from an ink supply source, to a pressure chamber of the inkjet head and having at least a portion thereof constructed from an ink supply pipe, and an air retaining member inserted in the ink supply pipe, with the ink allowed to pass through the air retaining member, and retaining air in at least a portion of a space formed between the air retaining member and the inner surface of the ink supply pipe.

Abstract: An inkjet printing method and an inkjet printing apparatus are provided which can realize equal smoothness in both a printed area and in a non-printed area and produce a printed material having a uniform glossiness over the entire printed image. To this end, the clear ink is applied in two phases—a first phase that makes the print medium impenetrable by applying highly penetrative clear ink to the print medium stepwise or intermittently in a small volume at a time and a second phase that applies in a short period of time a greater volume of clear ink than that applied in the first phase of clear ink application. With this process, a clear ink layer of a uniform thickness is formed in both the printed area and the non-printed area on the surface of the print medium made impenetrable by the first phase.

Abstract: A recording method for printing on a plastic film surface of a print medium by ejecting droplets of a water-based ink composition onto the plastic film surface includes applying a water-based ink composition on the plastic film surface, and heating the water-based ink composition on the plastic film surface to a temperature of 40° C. or more. The water-based ink composition contains a coloring agent, 0.1% to 1.5% by weight of a silicone surfactant, an acetylene glycol surfactant, a pyrrolidone derivative, a thermoplastic resin, and water.

Abstract: An ink to be applied to a recording head having a common liquid chamber, pressure chambers developing pressure applied to the liquid, individual channels through which the liquid is introduced into the pressure chambers from the common liquid chamber, and a group of nozzles which communicate with the pressure chambers and eject the liquid, where first nozzles having short individual channels and second nozzles having long ones are alternately arranged at arrangement intervals of less than 30 ?m along one side or sides of the common liquid chamber, contains an aqueous medium, a surfactant and a coloring material. The aqueous medium consists of water and a water-soluble organic compound containing at least one alkanediol and has a surface tension of from 40 mN/m or more to less than 60 mN/m in an environment of temperature 25° C. and humidity 50%.

Abstract: The present disclosure provides a aqueous colorant dispersion comprising a colorant and a polymeric dispersant, wherein the polymeric dispersant is a block copolymer comprising an A block and a B block, wherein the A block is a segment having a block size of about 5 to about 18 units, is substantially free of hydroxyethylmethacrylate, and comprises at least 50% by weight of a monomer, having the following structure: CH2?CRC(O)O(CHR1CH2O)nR2, wherein R and R1 are H, or methyl; R2 is alkyl of 1-4 carbon atoms or phenyl; and n is about 1 to about 20; and the B block is a segment comprising an ionic monomer and at least one hydrophobic monomer; and wherein the dispersant is neutralized. The disclosure further pertains to an aqueous ink jet ink comprising this aqueous colorant dispersion. Still further, the disclosure pertains to a method of printing that provides images with the requisite optical density and chroma needed for emerging ink jet applications.

Abstract: There is provided a water-based ink for ink-jet recording including: a colorant including a self-dispersible pigment modified by a carboxylic acid group; a highly polymerized compound containing a carbodiimide group; an ether sulfate-based anionic surfactant; water; and a water-soluble organic solvent.

Abstract: This invention concerns vision control panels and a method of UV inkjet printing vision control panels. A substantially imperforate light permeable material is partially printed with a ‘print pattern’ comprising a base layer and a design layer comprising a design colour layer. The method is limited to digital UV inkjet printing of all the superimposed layers required to make such panels. Optionally, the method uses a novel printhead array with a novel order of ink color supply and/or novel software to enable the required build-up of ink layers, for example of black, optional silver, white, cyan, magenta, yellow and process black colors. Printing is preferably arranged so that the base layer and design color layer are printed in the minimum number of passes of the printhead assembly of the digital UV inkjet printer to achieve the desired effect, preferably in one pass of the printhead assembly.

Abstract: Disclosed is a recording method in which an image is first formed on an intermediate transfer medium by ejection of ink and is then transferred to a printing medium. The present invention solves a problem regarding insufficient transfer of the image to the printing medium, which is caused by roughness on a surface of the ink image formed on the intermediate transfer medium due to non-uniform application amounts of ink. A transferability improving agent is applied in a controlled manner to an ink image which has been formed on a transfer drum by application of ink. The transferability improving agent is applied in a larger amount to regions with a relatively small application amount of the ink as compared with regions with a relatively large application amount of the ink.

Abstract: Structure and method for face form retention in eyeglasses and eyeglass frames for substantially preventing creep from altering the face form. The method comprises providing an eyeglass frame front having a space in the bridge region for receiving a metallic strip, providing the metallic strip having a width approximately matching the width of the space in the eyeglass frame front and a thickness that is less than its width, and fastening the metallic strip in the space in the bridge region so that the width of the metallic strip rigidifies the eyeglass frame front to retain its face form. Various specific methods and structures are disclosed.

Abstract: Techniques for providing eyewear with electrical components are disclosed. The electrical components can provide electrical technology to eyewear (e.g., eyeglasses) without having to substantially compromise aesthetic design principles of the eyewear. Often, the electrical components can be attached to the eyewear as an after-market enhancement. The electrical components can operate independently or together with other electrical components provided elsewhere.

Abstract: A soft contact lens for treating ametropia having an optical zone, a pressure control zone, an alignment zone, and a peripheral zone.

Abstract: An improved dual-filter lens for protective eyewear that combines a first filter for blocking essentially 100% of UV light, and second filter for filtering blue light. The first filter may comprise a multi-layered dielectric mirror layer 14 or Rugate filter 50, and the second filter may comprise dye-impregnated lens layer(s) 16, 18 or Rugate filter 50. The first filter blocks essentially 100% of UV light, while the second filter establishes an increasing transmission profile that cuts on sharply at approximately 415 nm, and establishes an increasing transmission profile between approximately 415 nm to about 475 nm. The cut-on slope rises approximately 0.15% in transmissivity for every nanometer of increasing wavelength change, with a maximum filtering effect within the 440-465 nm range. These dual filters provide a balanced light transmission profile that reduces harmful light transmission and prevents macular degeneration, cataracts and other ocular injuries, while still preserving visual acuity.

Abstract: The present invention tests and/or trains the visual sensitivity of a subject using adaptable visual indicia. One or more visual indicia possessing a visual trait are displayed to the subject. The displayed visual indicia possessing a visual trait may be adjusted to determine when a subject can and cannot be perceived by the subject. A displayed visual indicia may be adjusted in its size, rate of movement, direction of movement, location of display, duration of display, or other characteristic. To determine whether a subject correctly perceived the visual trait possessed by a displayed visual indicia, an input may be received from the subject. If an input received corresponds to the visual trait possessed by the displayed visual indicia, the subject may be determined to have correctly perceived the displayed visual indicia and the visual trait.

Abstract: Imaging optics for optical devices, with which reflections of the illumination light, which is guided through the same optical elements as the observation light, are kept from reaching the observation pupil of the imaging beam path. The non-reflective imaging optics include at least two refractive optical elements, which are utilized for illumination as well as observation. The at least two refractive optical elements are designed approximately wedge-shaped and are tilted at a random azimuth angle of at least 5° and/or are positioned off-center in the beam path to block out the single reflections of the illumination, occurring at the optical system surfaces, for the observation. The imaging optics are for optical devices, particularly in ophthalmology thought the invention is applicable to other ophthalmological devices as well as to optical devices outside of this field.

Abstract: A system and method for determining the neurological function of a patient by examining ocular responses.

Abstract: Apparatus for testing a subject's visual field includes a data processor, which can be provided by a general purpose computer, coupled to a pupil tracking system. The data processor is programmed to cause targets to be displayed at different locations on a display screen and to determine from the pupil tracking system whether the subject's pupil has moved in response to display of each target. In some embodiments, the pupil tracking system comprises an infrared camera.

Abstract: The invention relates generally to optical tomographic imaging and in particular to systems and methods for adapting the resolution of imaging. One embodiment of the present invention is an apparatus for optical coherence tomography imaging, characterized by its ability to vary the axial resolution and scanning speed during imaging.

Abstract: To provide an optical imaging apparatus capable of providing a high lateral resolution in a wide region and easily adjusting prior to imaging for imaging an optical image of an eye to be inspected which is an object, and a method for imaging an optical image. The optical imaging apparatus in which a beam from a light source is used as a measuring beam, and an image of an object is imaged based on intensity of a return beam formed of the measuring beam irradiated to the object has the following: first, an optical device for focusing the measuring beam on the object; next, a aberration detecting device for measuring a aberration of the return beam; and a focus adjusting device for adjusting the optical device based on the aberration detected by the aberration detecting device.

Abstract: There is provided an apparatus for irradiating a beam at a user's eye gaze point and an operation method thereof. The apparatus includes an eye gaze point detecting part analyzing a movement of a user's pupils and detecting the user's eye gaze point, and a beam irradiation part irradiating a beam at the user's eye gaze point detected by the eye gaze point detecting part. The apparatus detects the user's current eye gaze point and irradiates the beam at the user's detected eye gaze point, thereby allowing for the performance of desired control with greater accuracy.

Abstract: An apparatus consistent with the present invention comprises a sensor for receiving a signal representing eye tremor and a processor for monitoring eye tremor while receiving the signal. A method consistent with the present invention includes receiving a signal representing eye tremor, comparing the received signal representing eye tremor to at least one reference value, and classifying a patient's brain stem function using the comparison of the received signal representing eye tremor to at least one reference value. An embodiment consistent with the present invention includes an ocular micro tremor (OMT) sensor and associated signal processing hardware and software for clinical analyses.

Abstract: The present invention contemplates a new and improved wavefront aberrometer attachable to an ophthalmic microscope. The present invention also contemplates implementation of a long working distance and a large measurement range into the wavefront aberrometer. The present invention further contemplates to make it quick and easy to insert the wavefront aberrometer and to move it away from the working space of the ophthalmic microscope. The present invention still further contemplates implementation of a keratometry measurement to monitor the corneal status at the time of wavefront power measurement.

Abstract: Disclosed are methods and systems for displaying images, and for implementing volumetric user interfaces. One exemplary embodiment provides a system comprising: a light source; an image producing unit, which produces an image upon interaction with light approaching the image producing unit from the light source; an eyepiece; and a mirror, directing light from the image to a surface of the eyepiece, wherein the surface has a shape of a solid of revolution formed by revolving a planar curve at least 180° around an axis of revolution.

Abstract: A projection type display apparatus includes: an illumination optical system which has a first array lens and a second array lens each of which has a plurality of lens elements having a plurality of rectangular shape openings and arranged in a matrix form; an illumination light source device which has one or more light sources having a polarization degree not smaller than 50% and one or more polarizers for transmitting one type polarized light and reflecting other type polarized light. At least one set of the light sources are arranged so that the polarization directions of light fluxes having high polarization degrees may be perpendicular to each other, the light fluxes are combined by the polarizer, condensed to a single region by a light-flux condensing element, and then directed toward another illumination optical system located in a subsequent stage.

Abstract: A projection system is disclosed, the projection system including: an illumination unit; a PBS (Polarizing Beam Splitter) reflecting the light from the illumination unit, transmitting an image light, having a width larger than that of entrance pupil through which the image light is incident, and having a structure in which a width of an area facing projection lenses is larger than that of an area perpendicular to an area facing the projection lenses; a display device receiving the light reflected from the PBS and outputting the light as an image light; and a projection unit mounted with the projection lenses for projecting the image light outputted from the display device to a screen.

Abstract: A projection unit comprising a coherent light source such as a laser diode and a beam shaping element forming a light beam which is directed towards a display, characterized in that it comprises a laser speckle suppression device which is positioned between the laser source and the display and wherein the laser speckle suppression device is a diffusing element actuated randomly by a piezoelectric vibrating structure.

Abstract: A rear-projection type display device has a projection device, a transmission type screen, a housing, and input means. The projection device projects a light from a light source, as an optical image. The optical image is projected to the transmission type screen. The housing accommodates the projection device and the transmission type screen. A user operation is inputted to the input means. The rear-projection type display device includes a storage section, a distortion amount detection section, a correction amount calculation section, and a correction section. The storage section stores a distortion detection image to be displayed on the transmission type screen.