Abstract: According to the present invention, a projection type image display apparatus enables control of a large amount of light masking through a light-masking unit while maintaining a uniform illumination distribution in an area to be illuminated by the illumination light. The apparatus uses two array lenses on which lens cells are arranged in matrix form, where light-masking unit masks the array lens installed on the light source side in their particular area. The light-masking unit adjusts the amount of light emitted from the light source. The light-masking area of lens cells adjacent to lens cells closest to an optical axis is made smaller than the light-masking area of other cells.

Abstract: In a display device provided with a frame memory developing an auxiliary line image as a display image and a means of reading out and displaying the image data developed in the aforementioned frame memory, the aforementioned auxiliary line image is constituted by background pixels and dashed auxiliary lines constituted by pixels which have luminance or color that is different from that of the background color and pixels with have nearly identical luminance or color to that of the background color; and by carrying out the display of the dashes so as to move, at fixed time intervals or arbitrary time intervals, the dash display areas of the aforementioned auxiliary lines on the trajectory of the figure described by the aforementioned auxiliary lines, the system is devised to display the auxiliary lines while controlling that an identical pixel of the display device is not displayed continually.

Abstract: An optical information recording/reproducing apparatus for recording information on a recording medium and/or reproducing information from the recording medium, includes: a laser light source for performing recording and/or reproducing information; a shielding part, using a liquid crystal, that can switch between transmission and interception of laser light emitted from the laser light source; a driving circuit for driving the switching between transmission and interception of the shielding part; a moving part for relatively moving the shielding part and the laser light; and a controlling circuit for controlling the moving part. The moving part relatively moves the shielding part and the laser light so as to switch a region to which the laser light is applied from a first region of the shielding part to a second region thereof different from the first region, in order to prevent the liquid crystal from deteriorating.

Abstract: A projection type image display device provided with an unauthorized use preventing system includes a button unit or a remote controller for operating the display device, a condition memory for storing information indicating at least one use condition in an authorized use of the display device, a password memory for storing a password for releasing a restriction on the use of the display device, a detector for detecting a used condition of the display device at a power on timing, and a processor for imposing restrictions on the use of the display device when the use condition detected by the detector does not match the at least one use condition indicated by the information stored in the condition memory and for relieving the restriction based upon input of the password.

Abstract: A data recording/reproducing device for recording data on a recordable area of a recording medium in an arbitrary recording unit, includes a control unit that controls the operation of the data recording/reproducing device. The control unit designates a recording unit where data on the recordable area is not recorded as a non-use area, determines whether data has been recorded, or unrecorded in the recording unit on the recordable area, determines the recording unit designated as the non-use area to have been recorded, and records data in the recording unit determined to be unrecorded when data is recorded on the recording medium, under the control.

Abstract: An image encoding device and corresponding decoding device are disclosed for achieving a high rate of compression. The encoding device includes an image conversion module that converts the direction of the images using right-left symmetry mode convention or up-down symmetry mode conversion. Encoding modules are used to encode both the unconverted and converted images. A mode selector module compares the quantity of codes in the encoded unconverted images and the quantity of codes in the encoded converted images, and selects codes that are smaller in the quantity of codes for output.

Abstract: Moving picture decoding arrangements where the motion vector for the target block of decoding is calculated on a decoding side. A reference frame is selected dependent on whether candidate blocks adjacent to the target block of decoding have a motion vector for forward prediction or backward prediction. In calculating the motion vector, a median of motion vectors of the adjacent blocks is set as the motion vector. Decoding of a moving picture is performed by using information of the selected reference frame and the calculated motion vector.

Abstract: A content receiver comprises: an acceptance unit for accepting a designation of a recording medium to which contents are to be output; a license information acquiring unit for acquiring output license information describing the output requirements of the contents; and an output unit for outputting the contents to the designated recording medium. The output license information includes usage time limit information indicating the time limit of using the contents in an output destination. The output unit acquires the usage time limit information from the output license information for the contents, and sets the acquired usage time limit information to a management information storing area in the designated recording medium, thereby managing the time period of using the contents in the recording medium even if the copyright protection of the recording medium, which is an export destination, has a function to manage the time period of using the contents.

Abstract: An optical unit includes a light source that emits light to be projected onto a screen, one or a plurality of optical elements that controls a spread of a beam of light from the light source to the screen, a combining element that combines the light emitted from the light source, and a scanning element. The light source outputs an optical beam that will generate an elliptically shaped beam spot on the screen, the beam spot having a major axis substantially perpendicular to a scanning direction, and the light source is driven with pulse width modulation (PWM) so that one driven pulse corresponds to one beam spot on the screen.

Abstract: An optical information recording/reproduction device includes a detection unit which detects a focus-direction height of a recording medium, a focus adjustment unit which adjusts a focus-direction distance between the recording medium and a signal light optical system and a reference light system, and a control unit which controls the focus adjustment unit so that a relative distance between the object lens of the signal light optical system and the recording medium is adjusted according to the focus-direction height of the recording medium detected by the detection unit.

Abstract: Obtain an expanded address without altering the bit number of an address which is embedded in a wobble. Generate a virtual bit which is not recorded on a disc, and which is expressed by the disparity from the rules and the presence or absence of information embedded in part or all of the wobble address.

Abstract: A projection type image display apparatus using a light source where excitatory light makes fluorescent material to emit fluorescent light is provided with improved lifetime of a fluorescent material light source without increasing in the apparatus size, The apparatus comprises an excitatory light source cluster, a substrate on which fluorescent material is arranged, light intensity detectors measuring the intensities of the excitatory light and the fluorescent light, a control device which judges based on the measured values of the light intensity detectors whether or not to move the substrate, and a motion device which moves the substrate. The control device may issue an instruction to move the substrate when the ratio of the decrease in the fluorescent light intensity to that in the excitatory light intensity exceeds a prescribed value. Also, the substrate may be moved in a direction perpendicular to the direction of the excitatory light optical axis.

Abstract: To provide a back light unit that reduces an uneven brightness and has a spatially uniform brightness distribution. According to an aspect of the present invention, the back light unit comprises an LED and a light guide plate for guiding light from the LED to a liquid crystal panel side, wherein a recess is provided on the back surface side of the light guide plate, wherein a plurality of LEDs are housed in the recess, and wherein a light amount limiting member is provided at a position facing the recess on s light exit surface side of the light guide plate. The light amount limiting member is configured, for example, by applying an ink with a predetermined optical property to a transparent sheet.

Abstract: In a liquid-crystal display device including an edge-light-scheme-employed backlight device, it is implemented to reduce its power consumption while maintaining its excellent picture-quality. The present invention is applied to the backlight device with a plurality of edge-light-scheme backlight cells in a matrix-like manner including a LED light-source, and a light-guiding plate for emitting light. The intensity of light from a backlight cell positioned at a screen's peripheral portion is so controlled as to be made lower than the intensity of light from a backlight cell at a central portion. The light intensity of a backlight cell having a LED light-source adjacent to a first edge portion of the illumination surface of the backlight device is so controlled as to be made higher than the light intensity of a backlight cell adjacent to a second edge portion opposed to the first edge portion.

Abstract: A broadcasting method and a broadcast signal receiving apparatus is provided wherein auxiliary information, such as video and audio data for supplementing broadcast information presented through a broadcasting network in an interlocked manner can be watched and listened to by the viewer. Broadcast information received from a broadcasting network is temporarily stored in a storage means of a broadcast signal receiving apparatus and a recording medium for storing auxiliary information used as a supplement to the broadcast information is mounted on the broadcast signal receiving apparatus. The broadcast information and the auxiliary information are then played back in an interlocked manner with a predetermined timing. As a result, a function to present information which cannot be accommodated in a broadcast frame and a parental function can be implemented.

Abstract: In a library apparatus, it is not considered that eliminated is an operation for reversing a direction of a double-sided readable/writable recording medium. In the library apparatus having a function of transporting and loading a recording medium from a recording medium storage unit to a recording and reproducing unit through a recording medium transportation unit, a direction in which an unrecorded recording medium is first loaded in the recording and reproducing unit is afterward treated as a front surface, and a direction opposite to the above direction is treated as a rear surface.

Abstract: An image processing apparatus having an input unit for inputting an image signal and an image corrector for correcting the input image signal is disclosed. The image corrector is arranged to extract from the input image signal a specular reflection component and a diffuse reflection component and generate a corrected image signal based on a computation result with respect to these specular and diffuse reflection components thus extracted. This image corrector is adaptable for use in various types of image processors, including projectors, display devices and imaging devices.

Abstract: An optical information recording/reproducing apparatus and an optical information recording/reproducing method that record information using holography, wherein the optical information recording/reproducing apparatus includes a signal generation unit that generates two-dimensional data by a two-dimensional encoding method in which a lower-limit value of a number of continuous ON/OFF pixels in an array in one direction of pixels in a two-dimensional spatial light modulator is K(K?2, K: natural number); and a pickup that records the two-dimensional data, generated by the signal generation unit, on a hologram disc.

Abstract: A contents receiving system uses a digital broadcast wave or a broadband network to enable a user to suitably view main content, and provide a user with subsidiary content information desired by the user. Each of subsidiary content control receivers A (101), B (102) transmits ID information specific to each of the subsidiary content control receivers A (101), B (102), and a request for acquiring subsidiary content, from a communication control unit (405) to a main content receiving display unit 100. The main content receiving display unit 100 uses a content separation control unit (310) to separate a stream into subsidiary content corresponding to the request. Then, a request information input/transmission control unit (313) transmits the separated subsidiary content and the received ID information to the subsidiary content control receiver in question. The subsidiary content control receiver judges from the ID information that the subsidiary content should be acquired.

Abstract: When performing the line-sequential addressing for setting the state of each of the cells arranged in rows and columns that constitute a display screen, discharge is generated that has intensity in accordance with display data corresponding to each of all cells belonging to the selected row for each selection of the row. Thus, the priming effect in the following discharge is generated.