Dot Type Patents (Class 313/472)
  • Patent number: 10249472
    Abstract: A charged particle beam device is described, which includes: a beam source configured to generate a charged particle beam propagating along an optical axis (A); an aperture device with a first number of apertures configured to create a first number of beamlets from the charged particle beam, wherein the first number is five or more, wherein the apertures are arranged on a ring line around the optical axis (A) such that perpendiculars of the apertures onto a tangent of the ring line are evenly spaced. The charged particle beam device further includes an electrostatic multipole device configured to individually influence the beamlets. Further, a charged particle beam influencing device and a method of operating a charged particle beam device are described.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: April 2, 2019
    Assignee: ICT Integrated Circuit Testing Gesellschaft f├╝r Halbleiterpr├╝ftechnik mbH
    Inventors: Dieter Winkler, Guy Eytan, Zvi Nir
  • Patent number: 9638951
    Abstract: A color filter substrate, an array substrate, a liquid crystal panel and a liquid crystal display device are disclosed. Said color filter substrate includes a plurality of pixel units, wherein said pixel unit comprises two diamond shaped sub-pixels and four isosceles triangle shaped sub-pixels, every two isosceles triangle shaped sub-pixels are arranged into a sub-pixel column with their vertex angles opposite to each other, and two sub-pixel columns are parallel to each other; said two diamond shaped sub-pixels and said two sub-pixel columns are disposed alternatively in horizontal direction; and colors of said diamond sub-pixels and the isosceles triangle shaped sub-pixels at least contains red, blue and green. The liquid crystal panel can enhance color reproducibility of the liquid crystal display panel and refinement degree of picture display and hence improving reality of picture display effect.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: May 2, 2017
    Inventors: Qiangtao Wang, Wenbing Li, Xinli Ma, Yan Li
  • Patent number: 7361417
    Abstract: A phosphor layer having improved contrast and brightness characteristics and a display device including the same are provided. The phosphor layer is made out of an ultra-fine pigment, a dispersant, a phosphor, a photosensitizer and a binder. The phosphor has a uniform distribution along the thickness of the phosphor layer, and the pigment varies in content over the thickness of the phosphor layer. A method of forming the phosphor layer is based on existing phosphor layer processes and includes a reduced number of processing steps than a filter screen method, thereby markedly lowering the manufacturing costs. The phosphor layer can be used in a cathode ray tube, a plasma display panel, a field emission display, and an organic electroluminescent device.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: April 22, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Byung-Heun Kang, Jong-Sang Lee, Jae-Hong Lim, Seok-Hwan Cha, Hong-Kyu Choi
  • Patent number: 6630691
    Abstract: The present invention provides an LED device comprising a phosphor-converting substrate that converts primary light emitted by the LED, which is blue light, into one or more other wavelengths of light, which then combine with unconverted primary light to produce white light. The substrate is a single crystal phosphor having desired luminescent properties. The single crystal phosphor has the necessary lattice structure to promote single crystalline growth of the light-emitting structure of the LED device. Moreover, the thermo-mechanical properties of the substrate are such that the introduction of excessive strain or cracks in the epitaxial films of the LED device is prevented. The characteristics of the substrate, i.e., the dopant concentration and thickness, are capable of being precisely controlled and tested before the LED device is fabricated so that the fraction of primary light that passes through the substrate without being converted is predictable and controllable.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: October 7, 2003
    Assignee: Lumileds Lighting U.S., LLC
    Inventors: Regina B. Mueller-Mach, Gerd O. Mueller, David A. Vanderwater
  • Patent number: 6541907
    Abstract: There is disclosed an image forming apparatus in which electric discharge by a peeled metal back film is prevented. In the image forming apparatus provided with a rear plate having an electron emitting device, and a face plate having a conductive film and a fluorescent layer having fluorescent particles, the conductive film is disposed on the fluorescent layer. When an average thickness of the fluorescent layer is set to d, an average particle diameter of the fluorescent particles is rp, and the thickness of the fluorescent film is D, D−rp≦d≦D+rp is satisfied.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: April 1, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tomoya Onishi
  • Patent number: 6188173
    Abstract: A cathode ray tube includes a rectangular panel on which a phosphor screen is formed, and a neck in which an electron gun assembly for emitting three electron beams is disposed. The cathode ray tube also has a funnel including a neck seal part at which the neck and the funnel are connected, a cone part formed contiguous to the neck seal part, and has a non-circular section having a maximum diameter along a direction other than a long axis and a short axis of the panel; and a body formed contiguous to the cone part and the panel. In the cathode ray tube, inflection points are formed between the cone part and the body, and the inflection point at a diagonal direction of the panel is formed nearer to the panel than the inflection points at the long axis and the short axis.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: February 13, 2001
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Gwang-soo Kang, Chi-heoun Song
  • Patent number: 6166486
    Abstract: A pixel for a display device has a shape outlined by a black matrix or a barrier. The pixel is shaped with a polygon having 2(n+1) angled portions where n is a natural number of 2 or more. Such a pixel may be also processed without a previously formed black matrix.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: December 26, 2000
    Assignee: Samsung Display Devices Co., Ltd.
    Inventor: Sung Hun Jee
  • Patent number: 5479068
    Abstract: The color cathode ray tube of this invention improves the purity (color purity) adjustment margin and permits bright display without deteriorating the resolution. At least the black matrix holes 40g, 40b, 40r, forming the phosphor surface or the shadow mask apertures are so arranged that the center-to-center distance between the adjacent holes or apertures corresponding to the pixel phosphors of the same color in a vertical direction is greater by about 10 to 70% than the center-to-center distance in an inclined direction. Further, at least the black matrix holes or the shadow mask apertures are shaped non-circular with their vertical cross-section greater than their horizontal cross-section. With this invention it is possible to provide a color cathode ray tube which has improved brightness and purity (color purity) adjustment margin and a substantially enhanced resolution.
    Type: Grant
    Filed: March 4, 1994
    Date of Patent: December 26, 1995
    Assignee: Hitachi, Ltd.
    Inventor: Satoshi Muto
  • Patent number: 5463273
    Abstract: An image display faceplate having a plurality of recesses (dimples) formed therein for receiving discrete phosphor droplets and having a conformal metallization layer disposed thereon is provided. The phosphor system so described may be dispensed onto the faceplate without the need for multiple sequential depositions, maskings, and material removals and provides for a single step deposition of dis-similar phosphor materials of which the phosphor system is comprised.
    Type: Grant
    Filed: May 4, 1994
    Date of Patent: October 31, 1995
    Assignee: Motorola
    Inventors: Yumiko Kato, James E. Jaskie, David A. Wiemann
  • Patent number: 5148082
    Abstract: A color picture tube comprising an envelope including a front panel, a phosphor screen formed in the inner surface of the front panel, and an electron gun arranged in the envelope. The phosphor screen includes a light absorbing layer having a plurality of holes and phosphor layers formed in the holes so as to partially overlap the light absorbing layer. The transmittance T of the light absorbing layer, the ratio a of the area of a light emitting region in a portion where the light absorbing layer overlaps the phosphor layers to the area of the phosphor screen, the ratio b of the area of the light absorbing layer to the area of the phosphor screen, and the ratio r of the light emitting region in the holes to the area of the holes satisfy the following relational expression: 1/T.gtoreq.1/2{(rb/a)-[a/(1-b)r]}.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: September 15, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeo Itou, Hidemi Matsuda, Hajime Tanaka, Kazuhiko Shimizu
  • Patent number: 4891110
    Abstract: An improved cataphoretic process is disclosed for use in the manufacture of a color cathode ray tube. The process provides for depositing in sequence on the tube screening surface at least two separate patterns of phosphor elements, with each pattern of elements capable of emitting light of a different color when excited. The process according to the invention comprises first depositing an electrically conductive coating over the screening surface for use as an electrode during each deposition operation. Second, an electrically insulative barrier is deposited over the conductive coating. Portions of the barrier are removed selectively and sequentially for controlling patterned, sequenced cataphoretic access to the electrically conductive coating.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: January 2, 1990
    Assignee: Zenith Electronics Corporation
    Inventors: Philomena C. Libman, Charles J. Prazak, III
  • Patent number: 4701789
    Abstract: A color cathode ray tube has a fibre optic faceplate with a uniform phosphor layer on the inside and color elements on the outside, which may be color filters or color phosphors responsive to light from the inside phosphor layer. With this arrangement, the tube may be rugged and alignment problems as between the shadow mask and color elements are eliminated since the color element may be formed after the tube has been permanently assembled, the formation of the color elements being achieved utilizing light generated by the inside phosphor layer in response to irradiation thereof by the electron beams. The shadow mask is arranged so that the zones of the inside phosphor layer irradiated by the scanning electron beams each have an area which covers the ends of a plurality of the optical fibres.
    Type: Grant
    Filed: March 11, 1986
    Date of Patent: October 20, 1987
    Assignee: Rank Electronic Tubes Limited
    Inventor: Gordon R. Bonye
  • Patent number: 4686416
    Abstract: A front assembly for a color cathode tube is disclosed. The tube faceplate has on its inner surface a centrally disposed screen area for receiving process materials during the spin-application process. The front assembly has a shadow mask support structure secured to the inner surface of the faceplate on opposed sides of the screen area. The structure has a first surface for receiving and securing a foil shadow mask, and a second surface inclined from the first surface to the screen area effective to conduct from the screen area any excess of coating material applied during the spin-application process. As a result, discontinuities in phosphor application visible to the viewer, and non-adherence of phosphor resulting in wash-off and flake-off, are avoided. An embodiment is also shown in which electrical connection is made between a mask support structure and a screen.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: August 11, 1987
    Assignee: Zenith Electronics Corporation
    Inventors: Lawrence W. Dougherty, Paul Strauss
  • Patent number: 4565947
    Abstract: In a shadow mask cathode ray tube for use with a light pen, the elemental phosphor areas emissive of red light comprise a blend of a red-emissive phosphor with silver-activated cadmium sulphide (CdS:Ag), the CdS:Ag being present in an amount from 10% to 30% by weight of the blend. In the preferred embodiment the blend comprises approximately 20% by weight of CdS:Ag and 80% by weight of industry standard P22R phosphor.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: January 21, 1986
    Assignee: International Business Machines Corporation
    Inventor: Andre B. Minn
  • Patent number: 4565946
    Abstract: In order to permit reliable light pen interaction with a black matrix shadow mask CRT, the conventional black carbon matrix is replaced by an IR phosphor. This provides a component of IR radiation irrespective of the particular color of the visible display at any given point, and such component can be detected by conventional silicon photodetector light pens. Preferably the particle size of the IR phosphor is substantially less than that of the primary color phosphors so as to largely retain both the packing density of the original black matrix and the edge definition at the IR phosphor/primary color phosphor boundaries. The IR phosphor particles are also pigmented with black graphite to retain the light-absorbing qualities of the original black matrix.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: January 21, 1986
    Assignee: International Business Machines Corporation
    Inventors: William H. Barrett, Andre B. Minn
  • Patent number: 4556620
    Abstract: Image display including a viewing screen comprising spaced elemental image areas and a light-absorbing matrix of crystalline zinc-iron sulfide particles adjacent to these areas. The display may be made by producing a layer which is tacky in substantially the pattern of the desired matrix, and then contacting crystalline zinc-iron sulfide particles with the tacky pattern, whereby particles adhere to the tacky pattern, thereby producing the desired matrix.
    Type: Grant
    Filed: January 16, 1985
    Date of Patent: December 3, 1985
    Assignee: RCA Corporation
    Inventor: Robert P. Thompson
  • Patent number: 4540913
    Abstract: A cathode-ray tube for color display comprises a face plate (1), a picture element layer (10) formed on an inner surface of the face plate and including two or more kinds of picture elements (5, 6 and 7), and a fluorescent material layer (4) formed between the picture element layer and the inner surface of the face plate and having a 10 percent afterglow time less than 50 microseconds. As necessary, a photoabsorptive material layer (2) may be provided in a matrix manner between the fluorescent material layer and the face plate. The picture element layer (10) performs a color display function and the fluorescent material layer (4) performs a communication function by means of a light pen. In case that a communication function by means of a light pen is not required, the step of forming the fluorescent material layer (4) may be omitted.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: September 10, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Takashi Ishii
  • Patent number: 4458175
    Abstract: The enhancement of the intrinsic viewing screen brightness of the Mosaic Additive system of color reproduction, sufficient for saturated reflectance color displays to be viewed comfortably by the ambient light, is taught. The enhancement comprises three means which may be employed severally or in combinations, to wit:I. Photoluminescent compositions in the color elements.II. Juxtaposed subtractive primaries with the additive primaries, as color elements.III. Variable (optical) density interstices.It is within the contemplation of the invention to effect an image, in cooperation with the viewing screen of this invention, by any suitable mechanical, electrical and/or chemical impression technique where it is desired to produce a Mosaic Additive color image for viewing with the unaided normal human eye by reflected ambient light. Such uses include: reflectance color--Television, Printing, Facsimile, Photography, and Xerography.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: July 3, 1984
    Inventor: Robert R. Weekley
  • Patent number: 4406971
    Abstract: A color cathode ray tube comprises a first fluorescent part on a part of an inner surface of a face plate and said first fluorescent part imparting a luminescence of a predetermining reference white color by irradiation of electron beams; a second fluorescent part on the remained part of the face plate and said second fluorescent part imparting red, green and blue fluorescent dots or stripes wherein the first fluorescent part for the reference white color is formed by a mixture or tricolor fluorescent materials for the second fluorescent part or a mixture of tricolor fluorescent materials which imparts a luminous spectrum being similar to that of the tricolor fluorescent materials for the second fluorescent part.
    Type: Grant
    Filed: July 11, 1979
    Date of Patent: September 27, 1983
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Fuji Telecasting Co., Limited
    Inventors: Yutaka Takano, Koji Yajima, Takashi Ishii, Tadahisa Yoshida, Katsuhiro Ota, Shigeru Yagishita
  • Patent number: 4325002
    Abstract: A luminescent screen for flat image display devices, having improved light efficiency comprises a glass screen (1) provided on its inner surface with a pattern of recesses (2) corresponding to a desired luminescent dot pattern with luminescent dot surfaces (5) positioned not only along the bottom of such recesses but also along the upwardly extending recess walls and a contrasting border layer (3) is positioned on the land areas between each recess. In producing such screens, the contrasting border layer is utilized as an etch mask for the recesses and as an application mask for the luminescent material.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: April 13, 1982
    Assignee: Siemens Aktiengesellschaft
    Inventors: Manfred Kobale, Hans P. Lorenz, Kaspar Weingand, Rolf Wengert
  • Patent number: 4268594
    Abstract: A method of manufacturing a fluorescent screen for color picture tubes comprises applying to the tube front plate a continuous sensitized filter layer and exposing it, applying a continuous sensitized fluorescent layer and exposing it through a mask and removing the unexposed parts of the fluorescent layer and the filter layer therebeneath by washing.
    Type: Grant
    Filed: April 17, 1980
    Date of Patent: May 19, 1981
    Inventors: Eberhard Gesswein, Werner Moller
  • Patent number: 4217520
    Abstract: This disclosure depicts an image display having a viewing faceplate for exhibiting an informational color image. The faceplate has deposited on an inner surface thereof a light-absorbing matrix surrounding mutually spaced elemental areas. The faceplate and each area includes a plurality of different colorants. The faceplate shows a body color of an undesired hue. The image display is characterized by the matrix having a color complementary to the undesired hue effective to counteract the hue and provide a substantially neutral body color.
    Type: Grant
    Filed: August 30, 1978
    Date of Patent: August 12, 1980
    Assignee: Zenith Radio Corporation
    Inventor: Meyer L. Sugarman
  • Patent number: 4205255
    Abstract: A fluorescent screen formed on the inner surface of the face plate of a color picture tube comprises a plurality of spaced apart light absorbing layers between adjacent matrix windows, light reflection layers formed on the light absorbing layers, stripe shaped three color phosphors respectively formed between adjacent light reflection layers to fill the matrix windows, and a metal back layer covering the light reflection layers and the three color phosphors. Each light reflection layer takes the form of a triangular section having a height substantially equal to the thickness of the three color phosphors and the opposite sides of the triangle incline toward the sides of the matrix windows. The width of each window is equal to the difference between a maximum electron beam diameter and one half the difference between the pitch of the windows and the width of each window.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: May 27, 1980
    Assignee: Hitachi, Ltd.
    Inventor: Yoshifumi Tomita
  • Patent number: 4140941
    Abstract: A cathode-ray display panel comprising first and second transparent substrates which constitute an envelope, a transparent electrode arranged on the first transparent substrate, a photoconductive layer arranged on the transparent electrode, a plurality of phosphor members arranged on the photoconductive layer, electrically insulating opaque substances embedded between the phosphor members, at least one cathode electrode for emitting electrons and at least one grid electrode for uniformly distributing the electrons emitted from the cathode electrode onto the phosphor members.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: February 20, 1979
    Assignee: ISE Electronics Corporation
    Inventor: Sashiro Uemura
  • Patent number: 4139797
    Abstract: This disclosure depicts a novel apparatus for use in a shadow mask type color television picture tube having a funnel and a faceplate attached to the mouth of the funnel. The faceplate has an electron excitable phosphor screen having triads of red, green and blue phosphor elements deposited thereon and an apertured shadow mask in spaced adjacency to the phosphor screen. The funnel has a neck containing an electron gun assembly for forming three electron beams. The apertures in the shadow mask form beam landing areas on the phosphor elements when the electrons pass through the apertures. This invention is a system for increasing color purity tolerance and leaving tolerance in at least a portion of a predetermined sector of the phosphor screen and shadow mask assembly to increase tolerance to radial registration errors between the electron beam landing areas and the phosphor elements due to shadow mask doming during operation of the tube.
    Type: Grant
    Filed: July 1, 1977
    Date of Patent: February 13, 1979
    Assignee: Zenith Radio Corporation
    Inventor: William A. Rowe
  • Patent number: 4135112
    Abstract: A color cathode ray tube screen structure, having means for enhancing the absorption of ambient light and providing improvement in the contrast of the image display, is comprised of three superimposed substantially continuous window-defining layers of optical filter materials. The primary, secondary and tertiary filter layers have discretely disposed window areas formed therein to expose a pattern of filter areas representing the respective filter materials. The filter windows are of a shaping similar to that of the apertures in a spatially related pattern mask member. Each window exhibits a uniform periphery free of indentations, being so defined by a uniform opaque interstitial encompassment homogeneously made up of the three distinct layers of filter materials. Disposed over the filter windows is a patterned screen of cathodoluminescent phosphor elements, which upon electron excitation produces color-emissions that are colormetrically related to the respective filter windows therebeneath.
    Type: Grant
    Filed: November 2, 1973
    Date of Patent: January 16, 1979
    Assignee: GTE Sylvania Incorporated
    Inventors: Mahlon B. Fisher, Anthony V. Gallaro, George N. Williams
  • Patent number: 4082978
    Abstract: In color television, where the picture appears in groups of two or more colors side by side on a screen, an individual concave mirror is provided for each such group, which combines the side by side colors and also adds more light to the picture, or alternately uses less electric power for a given brightness.
    Type: Grant
    Filed: April 11, 1975
    Date of Patent: April 4, 1978
    Inventor: Peter Schwarz
  • Patent number: 3952225
    Abstract: An image screen structure for a monochrome or a color cathode-ray tube, in which the phosphor screen is interposed between a composite mesh and the conventional reflective metal backing layer. The composite mesh comprises a reflective grille and a non-reflective grille in registration with the reflective grille. The reflective grille faces the phosphor screen so that light generated by phosphor excitation behind the non-reflective grille finds egress by multiple reflections between the reflective grille and the metal backing layer. In a color cathode-ray tube such as a tri-color shadow-mask television picture tube, the non-reflective and reflective grilles may be non-coherent with the mosaic phosphor screen, thus avoiding the necessity of complicated and costly processing which has been employed in the manufacture of black-surround color picture tubes. A substantial improvement in brightness/contrast performance is obtained as compared with the best prior art monochrome and color cathode-ray tubes.
    Type: Grant
    Filed: October 18, 1971
    Date of Patent: April 20, 1976
    Assignee: Zenith Radio Corporation
    Inventor: Leonard Dietch