Patent application number | Description | Published |
20090244040 | PLASMA DISPLAY PANEL, DRIVING METHOD OF PLASMA DISPLAY PANEL, AND PLASMA DISPLAY APPARATUS - The present invention provides a technique relating to a PDP and capable of canceling or reducing luminance unevenness due to voltage drop or the like. In a structure of the PDP, for example, two types of cells different in discharge timing are arranged in a zigzag manner on a screen. For example, the two types of cells have different discharge gap lengths because of a difference in areas and lengths of projections of electrodes of the respective cells. By the dispersion of discharge timings of cells, the voltage drop or the like is reduced. The design characteristic obtained by the arrangement pattern is superimposed on panel manufacture characteristic, whereby luminance unevenness is cancelled or reduced in display characteristic. | 10-01-2009 |
20100156267 | PLASMA DISPLAY PANEL - A plasma display panel has a first plate provided with a plurality of display electrodes extending in a first direction and a second plate in opposition to the first plate via a discharge space. The second plate is provided with a plurality of address electrodes extending in a second direction and a phosphor layer. The phosphor layer includes a magnesium oxide crystal and a plurality of kinds of phosphors, the phosphors being classified according to respective kinds. A surface of a particle of manganese-activated zinc silicate, which is one of the plurality of kinds of phosphors, is coated with a coating oxide which is at least one kind of element being oxidized. An electronegativity of the coating oxide is smaller than an average electronegativity of contained elements of zinc silicate excluding oxygen. | 06-24-2010 |
20100194727 | PLASMA DISPLAY DEVICE - In a plasma display device, a temperature-monitoring electrode for monitoring a panel temperature is parallely arranged with at least either one of a display electrode and a scan electrode, or an address electrode in a PDP. And, a resistance-value monitoring circuit for monitoring a resistance value of the temperature-monitoring electrode is connected to the temperature-monitoring electrode, and further, a temperature-converting circuit for converting the resistance value monitored by the resistance-value monitoring circuit into a temperature is connected to the resistance-value monitoring circuit. And, respective driver drives respective electrode with applying a driving waveform and/or a driving voltage suitable for the temperature converted by the temperature-converting circuit, so that a useless margin design is unnecessary, and as a result, a performance in a normal-use situation can be improved. | 08-05-2010 |
20100259727 | OPTICAL UNIT - Disclosed is an optical unit for an image display device, the unit including: one or a plurality of light sources; one or a plurality of optical elements that control a spread of light; a combining element that combines the beams of light emitted from the light sources; and a scanning element, wherein the light from each of the light sources generates an elliptical beam spot on a screen and the spot has a major axis substantially perpendicular to a scanning direction, the result is that the unit is simple in structure, inexpensive, compact, lightweight, and capable of providing high-resolution image quality, thus providing the display device reduced dimensionally and in weight. Such an image display device using the optical unit is also disclosed. | 10-14-2010 |
20110001427 | PLASMA DISPLAY PANEL AND METHOD OF MANUFACTURING THE SAME, AND DISCHARGE STABILIZER POWDER - A technique for achieving both discharge voltage reduction and discharge stabilization in a PDP and the like is provided. This PDP manufacturing method includes, for a structure of a front plate structure ( | 01-06-2011 |
20110018169 | METHOD OF MANUFACTURING PLASMA DISPLAY PANEL AND METHOD OF PRODUCING MAGNESIUM OXIDE CRYSTAL POWDER - A method of manufacturing a plasma display panel (PDP) in which a priming particle emitting layer containing magnesium oxide crystal powder is arranged, the plasma display panel both achieving improvement effects of generation of clusters of magnesium oxide crystal and discharge delay. A typical embodiment of the present invention is a method of manufacturing a PDP in which a priming particle emitting layer which contains magnesium oxide crystal powder subjected to a high-temperature heating treatment is arranged to be exposed to a discharge space, wherein, in a thermal treatment process of raw material magnesium oxide crystal powder, the high-temperature heating treatment is performed after shapes and sizes of the magnesium oxide crystal powder are uniformed. | 01-27-2011 |
20110018786 | PLASMA DISPLAY PANEL AND PLASMA DISPLAY DEVICE - There is provided a technique for discharge stabilization of a plasma display panel by forming magnesium oxide with a large diameter and adjusting residual amounts of impurities contained in the magnesium oxide. That is, discharge stabilization material particle, which is coated on a protective-film layer of protecting electrodes and supplies sufficient amount of priming particles into a discharge gap, is focused. By setting each impurity concentration in the magnesium oxide used as the discharge stabilization material particle to 20 ppm or lower, discharge time lag is suppressed. | 01-27-2011 |
20110096060 | PLASMA DISPLAY DEVICE - A plasma display device is provided which includes: a first common electrode (Xi) that is supplied with a constant voltage in a display discharge period; a first scan electrode (Yi) that is provided in parallel to the first common electrode and supplied with a display discharge pulse in the display discharge period to perform display discharge between the first scan electrode and the first common electrode; and a first address electrode (Aj) that is provided in a manner to intersect the first common electrode and the first scan electrode, wherein the capacitance (Cax) between the first common electrode and the first address electrode is larger than the capacitance (Cay) between the first scan electrode and the first address electrode. | 04-28-2011 |
20110242498 | LASER PROJECTOR - A projector using coherent light as a light source includes: one or more coherent light sources emitting coherent light beams; a beam scanner which changes a direction of the coherent light beam; and a beam splitter which splits a beam into multiple segments and changes a phase of light of each split segment, the beam splitter being located in an optical path between the beam scanner and the coherent light source. This projector reduces speckle noises. The beam splitter includes a pair of transparent substrates; a plurality of parallel electrodes disposed on each surface of the pair of transparent substrates, the pair of the parallel electrodes being disposed in a perpendicular direction to each other. Voltages are applied to the respective electrodes at predetermined time intervals so as to produce different potentials in a liquid crystal sandwiched by the transparent substrates. | 10-06-2011 |
20120069435 | AUTOSTEREOSCOPIC DISPLAY - By installing a diffuser between a group of projectors and lenses to spread light rays from the projector group, it is possible to provide pixels with such sizes as to give perception that pixels are adjacent to each other. As a result, smooth representation of images and video display with a high stereoscopic effect are made possible. | 03-22-2012 |
20120082177 | LASER PROJECTOR AND METHOD OF SCANNING LASER BEAM - A laser projector for scanning a laser beam output by a multimode laser light source and displaying an image includes a laser driving unit to drive the multimode laser light source so that two-dimensional output patterns of a shape of the laser beam are different in each display frame. The laser driving unit applies to the multimode laser light source a driving waveform pattern which has the same product of an output intensity and output time of a laser light source during a display time of one dot and which includes an output intensity and output time different in each display frame. | 04-05-2012 |
20130107224 | Optical Unit | 05-02-2013 |
20130201459 | LASER PROJECTOR - A laser projector includes a laser light source to emit laser light modulated in accordance with image information, a scanner to drive the laser light along two axes in horizontal and vertical directions and make scanning two-dimensionally with the laser light, a scanning mirror drive part to produce a drive signal of the scanner, a light source data conversion part to change arrangement in a horizontal direction of data applied to the laser light source and a timing generation part to synchronize the scanning mirror drive part with the light source data conversion part, and a start direction of laser scanning in the horizontal direction is changed every frame of the image information. | 08-08-2013 |
20140015874 | Optical Unit - 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. | 01-16-2014 |
20140078473 | SCANNING TYPE PROJECTOR - A scanning type projector two-dimensionally projecting a laser beam and generating an image according to the present invention comprises: a light source having a light intensity corresponding to a pixel of the image and emitting a laser beam having an elliptical beam; a collimator lens collimating a laser beam emitted from the light source without converting the same into focused light; a beam contracting/shaping element that reduces a luminous beam width in a predetermined direction of the laser beam emitted from the collimator lens; a condensing lens that converts a laser beam emitted from the beam contracting/shaping element into focused light corresponding to a projection distance; and a two-dimensional scanning unit configured to two-dimensionally scan and project a laser beam emitted from the condensing lens. | 03-20-2014 |