With Optics Patents (Class 313/474)
  • Patent number: 10177447
    Abstract: Methods and devices useful in radio frequency (RF) signal transmission are provided. By way of example, a wireless electronic device may include a transceiver, and an enclosure in which the transceiver is disposed. The enclosure may include an RF transparent layer and an RF opaque coating disposed on the RF transparent layer, where the RF opaque coating includes a pattern formed therein to enable RF signals to pass therethrough.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: January 8, 2019
    Assignee: Apple Inc.
    Inventors: Yi Jiang, Jiangfeng Wu, Siwen Yong, Lijun Zhang, Mattia Pascolini, Martin Melcher, James Wilson
  • Patent number: 10015390
    Abstract: An image capturing apparatus in which a plurality of pixels each having a plurality of photoelectric conversion units for receiving light fluxes that have passed through different partial pupil regions of an imaging optical system are arrayed, wherein an entrance pupil distance Zs of the image sensor with respect to a minimum exit pupil distance Lmin of the imaging optical system and the maximum exit pupil distance Lmax of the imaging optical system satisfies a condition of 4 ? L min ? L max L min + 3 ? L max < Z S < 4 ? L min ? L max 3 ? L min + L max .
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: July 3, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventor: Koichi Fukuda
  • Patent number: 9423551
    Abstract: A backlight assembly includes a light emitting part including a light source configured to generate a light having a first color and a phosphor disposed on the light source and having a second color, an optical filter part configured to filter a light from the light emitting part and a color conversion member disposed adjacent to the optical filter part and having a third color. A wavelength of the third color is shorter than a wavelength of the second color.
    Type: Grant
    Filed: July 18, 2014
    Date of Patent: August 23, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Hoon Lee, Min-Ki Nam, Hae-Il Park
  • Patent number: 9082946
    Abstract: A light emitting module 150 emits light through a light exit window 104 and comprises a base 110, a solid state light emitter 154, 156 and a partially diffusive reflective layer 102. The base 110 has a light reflective surface 112 which faces towards the light exit window 104. The light reflective surface 112 has a base reflection coefficient Rbase which i defined by a ratio between the amount of light that is reflected by the light reflective surface and the amount of light that impinges on the light reflective surface. The solid state light emitter 154, 156 emits light of a first color range 114, comprises a top surface 152, 158 and has a solid state light emitter reflection coefficient R_SSL which is defined by a ratio between the amount of light that is reflected by the solid state emitter 154, 156 and the amount of light that impinges on the top surface 152, 158 of the solid state light emitter 154, 156. The light exit window 104 comprises at least a part of the partially diffusive reflective layer 102.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: July 14, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Olexandr Valentynovych Vdovin, Hendrik Johannes Boudewijn Jagt, Coen Adrianus Verschuren, Christian Kleijnen, Durandus Korneius Dijken, Marcellinus Petrus Carolus Michael Krijn
  • Patent number: 7898162
    Abstract: An electron beam pumped laser including a surface-emitting laser faceplate oriented at a non-perpendicular angle. Embodiments are described in which a bending coil bends the electron beam, or in which the faceplate is situated in the direct path of the e-beam emission but with a non-zero orientation angle. The faceplate may include a substantially opaque substrate, and an opaque heat-removing structure may be attached to the substrate to provide high heat transfer, thereby allowing high electron-beam pumping intensity and providing more light emission from a smaller package. In some embodiments the partially reflective mirror comprises a metal layer that has a plurality of openings. Multiple laser faceplates (e.g., red, green, and blue) may be placed in the same tube, to provide a continuous light source for projection television. The substrate may be connected to ground to provide an exit path for electrons from the laser gain layer.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: March 1, 2011
    Assignee: Principia Lightworks, Inc.
    Inventors: Michael D. Tiberi, Vladimir I. Kozlovsky
  • Patent number: 7834528
    Abstract: A composite thin film-holding substrate for a surface light emitter, which is a transparent substrate including a composite thin film containing fine particles and a binder formed on the surface of a transparent base material. The refractive index of the composite thin film is higher than the refractive index of the transparent base material. The difference in the refractive index between the fine particles and the binder contained in the composite thin film is at least 0.1, and the ratio of (solid content mass of the fine particles)/(solid content mass of the binder+solid content mass of the fine particles) of the composite thin film is from 0.01 to 0.5. A surface light emitter can use the substrate.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: November 16, 2010
    Assignee: Nissan Chemical Industries, Ltd.
    Inventors: Satoru Numajiri, Kenichi Motoyama
  • Patent number: 7382089
    Abstract: A field emission display (FED). A vacuum assembly is formed with first and second substrates and a sealant. An electron emission assembly is formed on the first substrate and emits electrons by the formation of electric fields. An illumination assembly is formed on the second substrate and realizes a display of images by electrons emitted from the electron emission assembly. The illumination assembly includes a transparent conductive layer formed on the second substrate and having an anode input terminal that extends outside the vacuum assembly and to which an anode voltage is applied, a phosphor screen formed on the transparent conductive layer, and a metal layer formed on the phosphor screen within the vacuum assembly in such a manner that a portion of the metal layer contacts the transparent conductive layer.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: June 3, 2008
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Tae-Sik Oh
  • Patent number: 7061172
    Abstract: A flat color cathode ray tube having excellent doming quality is obtained by improving the structure of a flat panel and by using a shadow mask made of AK (aluminum-killed) material. According to the cathode ray tube, an outer surface of a panel used for the cathode ray tube is substantially flat, and an inner surface thereof has a curvature, and a transmittance ratio of ending portion of an effective surface to central portion of the panel is in the range of 0.4 to 0.6, and the radius of diagonal curvature (Rd) of the inner surface of the panel is in the range of 1.29R to 4.35R (R=1.767×diagonal length of effective surface), and a shadow mask is made of AK material. The cathode ray tube embodying the principles of the present invention is very advantageous in that it has a price as low as half the price of the conventional cathode ray tube, yet its panel uses a shadow mask made of AK material which has a doming quality equivalent to that of a shadow mask made of Invar material.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: June 13, 2006
    Assignee: LG.Philips Displays Korea Co., Ltd.
    Inventor: Sung Han Jung
  • Patent number: 6960873
    Abstract: A novel CRT and method of making the CRT are disclosed. The CRT comprises an internal neutral density filter that lies between the phosphor deposits and the interior surface of the faceplate panel. The filter enhances the contrast of the CRT without compromising center to edge brightness ratio of the CRT. The filter comprises very fine particles, wherein the particles are black, gray, or a mixture of black and gray. The filter reduces the absorption of the faceplate by 25 to 75%. The invention is particularly useful for substantially flat CRTs. The method of producing the novel CRT comprises the steps of preparing a suspension of well-dispersed light-absorbing, carbon-containing particles which are 0.05 to 2 microns in aqueous media and applying the suspension onto the interior surface of the faceplate panel prior to applying at least one phosphor deposit. The suspension may also include suitable organic and inorganic binders and dispersing and wetting agents.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: November 1, 2005
    Assignee: Thomson Licensing
    Inventor: Himanshu Mukundray Patel
  • Patent number: 6946160
    Abstract: A method of forming a fluorescent screen where a pigment film and a fluorescent film are deposited on a surface of a light transmissive substrate, is presented. The method includes coating a pigment dispersion liquid on the surface of the light transmissive substrate to form a coated film and forming the pigment film by drying the coated film. The drying of the coated film is performed under conditions that a temperature of the corner portions of the light transmissive substrate is controlled to 36° C. to 50° C.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: September 20, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Norihisa Nakao
  • Patent number: 6885143
    Abstract: A cathode ray tube is provided, and more particularly, a cost-effective cathode ray tube effective for minimizing deterioration of color purity and obtaining a sufficient margin for a beam strike neck (BSN) phenomenon by moving a ½ center (deflection center) closer to a panel without changing the curvature of a funnel or the thickness of a glass inside the funnel.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: April 26, 2005
    Assignee: LG. Philips Displays Korea Co., Ltd.
    Inventor: Hyuk Dong Kim
  • Patent number: 6873380
    Abstract: A display may be formed of a plurality of abutted tiles, each tile contributing a portion of the overall displayed image. Optical elements may be selectively situated between pixels to improve the optical performance of the display. In some embodiments, these optical elements may facilitate the use of relatively thicker cover glasses over the display tiles.
    Type: Grant
    Filed: July 12, 2001
    Date of Patent: March 29, 2005
    Assignee: Intel Corporation
    Inventors: Dennis L. Matthies, Zilan Shen
  • Patent number: 6841927
    Abstract: A color cathode ray tube capable of improving the luminance attenuation characteristic and the explosion-proof characteristic through an improved shape of a panel is disclosed. In an equation F=Rdo/(Sd H 1.767), F>21, Tc/CFT?1.35, and Rdi>(Ryi or Rxi) are satisfied, wherein Sd is a length of a diagonal effective picture of the panel, Rdo is a curvature radius of a diagonal outer surface, Ryo is a curvature radius of a vertical outer surface, Rxi, Ryi and Rdi are a horizontal, vertically and diagonal curvature radius, respectively, CFT is a thickness of a center portion, Tc is a thickness of a diagonal end of the effective surface, F is a planarizing rate of the outer curvature.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: January 11, 2005
    Assignee: LG. Philips Displays Korea Co., LTD
    Inventor: Tae Hoon Lee
  • Publication number: 20040227449
    Abstract: A Psychophysical Perception Enhancement, for use in juxtaposition to a perceptible output spectrum, and the enhancement includes: (a) designating a target enhancement region in the spectrum and the region is defined as having at least one boundary; (b) proximate to one of the boundaries, defining a perceptible transition region; and (c) in the transition region, applying a filter having a spectral shape substantially inverse to normal perception for the transition region. The enhancement is preferably applicable to a visual or audio systems and can be embodied as a digital, analog, mechanical, passive, optical element.
    Type: Application
    Filed: May 17, 2003
    Publication date: November 18, 2004
    Inventors: Chaim Scheff, Amir Ben-Shalom, Shlomit Engel, David Coates
  • Publication number: 20040151995
    Abstract: A color filter luminescent screen assembly for a cathode ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a faceplate panel of the CRT tube. The luminescent screen assembly includes a patterned light-absorbing matrix that defines a plurality of sets of fields corresponding to one of a blue region, a red region and a green region. A color filter is formed in one of the plurality of sets of fields. The color filter may be, for example, a blue pigment layer, a red pigment layer or a green pigment layer. After the pigment layer is formed, a cap layer is formed thereon. The cap layer is formed from an aqueous solution of a photosensitive material and a polymer. Thereafter, a phosphor layer is deposited on the cap layer.
    Type: Application
    Filed: January 30, 2003
    Publication date: August 5, 2004
    Inventors: Kangning Liang, Bhanumurthy Venkatrama Subrahmanya Gunturi
  • Patent number: 6756727
    Abstract: The invention describes a color picture screen with an enhanced contrast. The color picture screen comprises a color filter layer between the picture screen glass and the phosphor layer, which filter layer comprises a red pigment in the areas of the red phosphors, a blue pigment in the areas of the blue phosphors, and a blue or a red pigment in the areas of the green phosphors.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: June 29, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Hans-Helmut Bechtel, Harald Gläser, Joachim Opitz
  • Patent number: 6713953
    Abstract: Disclosed is a field emission display device which can prevent mixing of colors between the phosphor elements of the field emission display device. In the field emission display device, an upper substrate and a lower substrate are spaced apart with a predetermined gap and opposed to each other. Cathode assemblies are formed in a shape of stripes on the lower substrate. Anodes are formed on the upper substrate, and black matrices are formed on the anodes. The black matrices are disposed at locations respectively corresponding to every space between the cathode assemblies, so as to respectively have a shape of a partition. R, G, and B phosphor elements are formed in spaces between the black matrices, so as to respectively correspond to the cathode assemblies.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: March 30, 2004
    Assignee: Boe-Hydis Technology Co., Ltd.
    Inventors: Un Cheol Sung, Ick Hwan Ko, Kyo Woong Lee, Young Wook Ko
  • Patent number: 6690107
    Abstract: A transparent inorganic intermediate layer extends between a color filter layer and a phosphor layer in a color display device. The intermediate layer stops electrons before they can penetrate the color filter layer. Aging phenomena which adversely affect the effectiveness of the color filter layer are thus precluded. It is alternatively possible to use hitherto useless pigments, in particular pigments which are unstable when they are exposed to an electron bombardment in the color filter layer (or layers). By virtue thereof, the effectiveness of the color filter layer has been increased.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: February 10, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Arie R. Van Doorn, Remko Horne, Godefridus P. Van Melis
  • Publication number: 20030137233
    Abstract: A monochrome cathode ray tube, and method of manufacture, including a face panel having a screen portion on which a single color phosphor screen is formed, and the phosphor screen being formed corresponding to an effective viewing area of an outer surface of the face panel. The cathode ray tube may further include a funnel including a neck and connected to the face panel, an electron gun mounted within the neck and emitting an electron beam, and a deflection yoke mounted on the funnel.
    Type: Application
    Filed: December 30, 2002
    Publication date: July 24, 2003
    Applicant: SAMSUNG SDI CO., LTD.
    Inventors: Jong-Sang Lee, Hwan-Chul Rho, IL-Hoon Kim, Chong-In Chung, Chul-Han Bae
  • Patent number: 6555953
    Abstract: A color cathode ray tube of the present invention includes an evacuated envelop that is structured from a panel having a phosphor screen on its inner surface, a neck portion containing therein an electron gun assembly, and a cone-shaped section called the funnel for integrally coupling the panel and the neck together, wherein when the main scanning direction of a display screen formed of the panel is defined as an X direction whereas a direction at right angles to the main scan direction is as a Y-direction, an equivalent radius of curvature Rxo of an outer surface of the panel in the X direction is at least 2.6 times greater than an equivalent curvature radius Rxi of the inner surface while forming on the inner panel surface an inside light absorption layer that is comprised of pigments as its principal component.
    Type: Grant
    Filed: July 19, 2000
    Date of Patent: April 29, 2003
    Assignees: Hitachi Ltd., Hitachi Device Engineering Co.
    Inventors: Masahiro Nishizawa, Hiroshi Yoshioka, Yoshiyuki Odaka, Toshio Tojo
  • Patent number: 6518698
    Abstract: A semiconductor laser CRT for driving at room temperature, whose target is pumped by an electron beam, in which a laser target is fixed to a beaker-shaped transparent glass support plate, and the glass support plate is sealed with a glass bulb using fused frit glass. Accordingly, there is no cracking of the glass bulb due to a difference in thermal expansion or destroying of a sustained airtight vacuum.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: February 11, 2003
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Chung-dam Song, Sang-kyun Kim, Sang-muk Kim, Young-woo Song, Moon-gueon Kim, Duk-sung Park, Jong-sig Choi
  • Patent number: 6515639
    Abstract: A cathode ray tube (CRT) display includes a display panel having a matrix of addressable carbon nanotubes, in which each individual nanotube can be selected to help draw a corresponding electron beam from a red, green, or blue electron gun to the desired portion of the display panel, thereby creating the desired image on through the display panel.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: February 4, 2003
    Assignees: Sony Corporation, Sony Electronics, Inc.
    Inventor: Luis Martinez
  • Patent number: 6512328
    Abstract: A laser CRT includes a vacuum bulb provided with a metal flange, and a laser screen secured in the metal flange and having a laser target mounted on the side of the vacuum bulb. A high-voltage input passes through the wall of the vacuum bulb at a distance from the metal flange, the laser target being electrically insulated from the metal flange and connected to the high-voltage input through an electrically conductive element disposed inside the vacuum bulb. The laser CRT further includes two screening electrodes mounted inside the vacuum bulb in the interspace between the wall of the vacuum bulb, the metal flange, the high-voltage input and the electrically conductive element, the screening electrodes being respectively connected to the high-voltage input and to the metal flange and extending from them towards each other so as to prevent electrical discharges between the metal flange and the high-voltage input and between the metal flange and the electrically conductive element in the interspace.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: January 28, 2003
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Oleg Mikhailovich Makienko, Nikolai Grigoryevich Rumyantzen, Jong-Sik Choi
  • Publication number: 20030011303
    Abstract: A display may be formed of a plurality of abutted tiles, each tile contributing a portion of the overall displayed image. Optical elements may be selectively situated between pixels to improve the optical performance of the display. In some embodiments, these optical elements may facilitate the use of relatively thicker cover glasses over the display tiles.
    Type: Application
    Filed: July 12, 2001
    Publication date: January 16, 2003
    Inventors: Dennis L. Matthies, Zilan Shen
  • Patent number: 6472810
    Abstract: A light device includes a shielding plate (2) having an opening (2H) of a rectangular cross-sectional configuration and placed over an optical window retainer (15). The shielding plate (2) is placed so that an opening wall surface (2HS) thereof is positioned on an optical path (Zr(x)) of light emerging from an optical window (14) at a usable angle (&thgr;e) and that a half width (Xu) of the opening (2H) satisfies Xu=u/cot(&thgr;e)+t×sin(&thgr;e)/sgrt(ng2−sin2(&thgr;e))+s. The optical window retainer (15) is placed in a region outside a boundary line given as Zh(x)=±(1×tan(&thgr;e)(x±Xu)+u (plus (+) when x≦−Xu; minus (−) when x≧Xu) and also in aregion outside the optical path (Zr(x)). The light source device suppresses an uneven illuminance distribution of exposure light resulting from superimposition of light scattered from the opening wall surface of the optical window retainer upon the exposure light.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: October 29, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Teramoto, Nobuyuki Zumoto, Shigeru Nishimoto
  • Patent number: 6396205
    Abstract: A nonspecular reflective visual display having a plurality of display elements with a substantially thin conformal layer of encapsulation material placed on a surface of the display elements. The conformal layer of encapsulation material diffusely reflects light incident upon the display, thereby eliminating glare.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: May 28, 2002
    Assignee: Xerox Corporation
    Inventor: Robert A. Sprague
  • Patent number: 6388373
    Abstract: Semi-flat CRT panel having relations of Ryi<Rdi<Rxi and 2×Ryi<Rxi, where Rxi denotes an inside surface horizontal curvature, Ryi denotes an inside surface vertical curvature, Rdi denotes an inside surface diagonal curvature for a CRT with an aspect ratio of 4:3 and an outside surface diagonal curvature Rd is greater than 30,000 mm, whereby securing a strength of the semi-flat CRT panel, eliminating a distortion of image, and reducing reflection from an external light.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: May 14, 2002
    Assignee: LG Electronics Inc.
    Inventor: Keon Soo Nah
  • Patent number: 6339286
    Abstract: A cathode ray tube which comprises a front panel coated with a nonglare film having a multi-layered structure. The multi-layered structure comprises at least a visible light absorbing layer containing a black dye, and an antistatic layer containing an inorganic metal compound as a conductive agent.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: January 15, 2002
    Assignee: Sony Corporation
    Inventors: Kunio Kojima, Takashi Setsuda, Takumi Takamura, Kouichi Kaneko, Hideo Kusama
  • Patent number: 6194825
    Abstract: A laser cathode ray tube (laser-CRT) is provided. The laser-CRT includes a connection ring connected to an end portion of a glass bulb where an electron gun is installed, a disk having a single-crystal for generating laser beams when electron beams emitted from the electron gun are input, a support ring connected to the disk and the connection ring, and a junction layer interposed between the support ring and the disk, having at least two metal thin films which have been pressurized and heated, to connect the support ring and the disk to each other.
    Type: Grant
    Filed: October 8, 1998
    Date of Patent: February 27, 2001
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Moon-gueon Kim, Jong-sick Choi
  • Patent number: 6140758
    Abstract: A display screen having a color filter including a black matrix formed on a substrate of the display screen. A number of color filter layers, each formed in holes of the matrix, provide filtering of light components corresponding to the color of the filter layer. Also provided is one other color filter layer of a final color. This other color filter is also formed on the matrix and formed in another one of the other holes. Consequently, the other color filter layer can be formed without the need of exposing an associated resist layer, thereby simplifying the color filter manufacturing process.
    Type: Grant
    Filed: April 12, 1999
    Date of Patent: October 31, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hidemi Matsuda, Takeo Itou, Makoto Onodera, Yoshinori Takahashi, Norihisa Nakao
  • Patent number: 6133687
    Abstract: An image relay arrangement (20) for use with a curved CRT faceplate (11) to relay a picture to a position in front of the faceplate comprises a first, imaging, microlens array (22), a second, field, microlens array (23) and a third, re-imaging, microlens array (24) which are spaced from one another and have corresponding microlens elements (25, 26, 27). At least one of the first and third arrays is curved with its spacing from the adjacent array varying over its area related to the faceplate curvature. Through this arrangement, the picture at the curved faceplate can be imaged onto a plane where, for example, a lenticular screen is located enabling autostereoscopic displays to be produced.
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: October 17, 2000
    Assignee: U.S. Philips Corporation
    Inventor: John A. Clarke
  • Patent number: 6111352
    Abstract: An explosion-proof film being good in visibility, scratch-resistance, and workability, and a cathode-ray tube using the film. The explosion-proof film includes a transparent plastic film as a base material; and a reflection preventive film having two or more layers, which is formed on one surface of the plastic film; wherein, of the two or more layers of the reflection preventive film, at least one has a light absorption function, and at least another has a conductive function. The explosion-proof film is stuck on a surface of a panel glass constituting a display screen of a cathode-ray tube, to thereby give an explosion-proof function to the cathode-ray tube, to achieve lightweightness of the cathode-ray tub, and to obtain the optimum visual contrast. The explosion-proof film may be formed of three or more layers.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: August 29, 2000
    Assignee: Sony Corporation
    Inventor: Hideaki Hanaoka
  • Patent number: 6094005
    Abstract: A color cathode ray tube includes black matrix films (31) formed on an inner surface of a glass panel (29) with a predetermined positional relation. The black matrix films (31) have a plurality of light transmission window portions (33, 35, 37), and fluorescent substance films (55) formed by fluorescent substance particles (39, 41, 43) of green, blue, and red at the light transmission portions. In the color cathode ray tube, the fluorescent substance films have wave length selective layers (45, 47) partly coated on a surface of at least one kind of the fluorescent substance particles of green, blue, and red. Each of the fluorescent substance films has a wave length selective characteristic.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: July 25, 2000
    Assignee: NEC Corporation
    Inventor: Nobumitsu Aibara
  • Patent number: 6013978
    Abstract: Adherence of the phosphor screen to the face panel of a color cathode ray tube is improved by placing a UV-reflective filter on the inside of the face panel prior to photolithographic forming of the screen, in order to reflect transmitted UV light back onto those areas from which the light emerged, thereby effectively increasing the exposure dosage of those areas.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: January 11, 2000
    Assignee: U.S. Philips Corporation
    Inventor: Robert L. Donofrio
  • Patent number: 5989649
    Abstract: The pigment dispersion composition having a good dispersibility, a good transparence and an anti-coating properties, which contains 0.5 to 50 parts by weight of an inorganic pigment, at least one type of dispersant selected from the group consisting of a sodium salt, an ammonium salt and an amine salt of an acrylic resin, an acryl copolymer resin, a polycarbonic acid, a condensation product of aromatic formalin sulfonate, and water or a solvent miscible with water.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: November 23, 1999
    Assignees: Kabushiki Kaisha Toshiba, Fuji Pigment Co., Ltd.
    Inventors: Takeo Itou, Hidemi Matsuda, Hisashi Chigusa, Kazuo Sakai, Masaru Fukuda
  • Patent number: 5986398
    Abstract: A field emission display device is arranged to improve the (luminance and the contrast and have a fluorescent screen for preventing a fluophor from being stripped off a substrate. The field emission display device includes a cathode electrode, the fluophors excited by electrons emitted by the cathode electrode, an anode electrode to which a given anode voltage is to be applied, and a metal film formed on the fluophors. The metal film is formed to have a thickness in the range of 2.times.10.sup.-6 E<t<2.times.10.sup.-5 E+0.02, where t is a thickness of the metal film and E is a voltage to be applied onto the anode electrode.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: November 16, 1999
    Assignee: Sony Corporation
    Inventor: Tetsuya Makino
  • Patent number: 5952776
    Abstract: A color display device is provided with a black-matrix layer, a phosphor pattern and color-filter layers. The theological behavior of the suspension and/or the evaporation of volatile constituents is influenced by the topology of the color-filter layers, with, in particular, projecting color-filter layers exerting an influence. As a result, variations in thickness between the phosphor layers occur. By reducing the differences in height between a projecting color-filter layer and the black-matrix layer, the variations in thickness between the phosphor layers are reduced and hence the quality of the picture displayed is improved.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: September 14, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Patent number: 5942848
    Abstract: A color display device for emitting, in operation, red, blue and green light having a substrate provided with a black matrix and only blue and red color filter layers.
    Type: Grant
    Filed: October 15, 1997
    Date of Patent: August 24, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Arie R. Van Doorn, Godefridus P. Van Melis
  • Patent number: 5939821
    Abstract: A color cathode ray tube includes a faceplate and a phosphor screen provided on the inner surface of the faceplate and including red, green, and blue phosphor layers. A color filter layer is interposed between the inner surface of the faceplate and the phosphor screen. The color filter layer includes color filters opposed individually to the phosphor layers of the phosphor screen and having colors corresponding thereto. Color filters of each color have a higher transmittance for light beams with wavelengths which are in a range of .+-.20 nm of the maximum emission spectrum wavelength of the phosphor layers of the corresponding color than for light beams with wavelengths which are outside the range and which are between 400 nm and 650 nm.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: August 17, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeo Itou, Hidemi Matsuda, Hajime Tanaka, Tomoko Nakazawa
  • Patent number: 5898263
    Abstract: The pigment dispersion composition having a good dispersibility, a good transparence and an anti-coating properties, which contains 0.5 to 50 parts by weight of an inorganic pigment, at least one type of dispersant selected from the group consisting of a sodium salt, an ammonium salt and an amine salt of an acrylic resin, an acryl copolymer resin, a polycarbonic acid, a condensation product of aromatic formalin sulfonate, and water or a solvent miscible with water.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: April 27, 1999
    Assignees: Kabushiki Kaisha Toshiba, Fuji Pigment Co., Ltd.
    Inventors: Takeo Itou, Hidemi Matsuda, Hisashi Chigusa, Kazuo Sakai, Masaru Fukuda
  • Patent number: 5798607
    Abstract: The brightness of a color CRT with a pigmented phosphor screen is improved by providing a composite layered screen in which a first layer of the composite layer is a relatively thin, heavily pigmented layer and a second is non-pigmented.
    Type: Grant
    Filed: April 3, 1997
    Date of Patent: August 25, 1998
    Assignee: U.S. Philips Corporation
    Inventor: Robert L. Donofrio
  • Patent number: 5686787
    Abstract: A color picture tube is disclosed, that comprises an outer sheath having an electron gun, the outer sheath being airtightly sealed, a face plate having light transmissivity and disposed on the front surface of the outer sheath, and a large number of red, blue, and green pixels regularly arranged inside the face plate, wherein the pixels have a fluorescent substance layer and a color filter, the fluorescent substance layer being lit by a radiation of an electron beam, the color filter being disposed between the fluorescent substance layer and the face palate, and wherein green pixels have a chromaticity that is plotted in the fourth quadrant of a coordinate system of a (L*a*b*) color system where a* is the horizontal axis and *b is the vertical axis when light of a standard light source C is reflected on the outside of the face plate.
    Type: Grant
    Filed: July 24, 1996
    Date of Patent: November 11, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeo Itou, Hidemi Matsuda, Hajime Tanaka, Tomoko Nakazawa, Tsuyoshi Oyaizu
  • Patent number: 5687185
    Abstract: A laser cathode-ray tube having an electron beam source, a means for its control, and a laser target containing a supporting substrate, a cavity resonator formed by two mirrors and multilayer semiconductor structure having active and passive strained layers, whose difference in lattice parameters in a free state is up to 10% or more and which have coherent boundaries between each other in the structure.
    Type: Grant
    Filed: October 28, 1995
    Date of Patent: November 11, 1997
    Assignees: Principia Optics, Inc., Principia, Optics, Ltd.
    Inventors: Vladimir I. Kozlovsky, Boris M. Lavrushin
  • Patent number: 5677071
    Abstract: The present invention is to improve color purity and brightness of a color Braun tube by constructing a fluorescent film for a red fluorescent material as a laminated structure. The present invention relates to a structure of a fluorescent film for a color Braun tube wherein the fluorescent film of the red fluorescent material comprises fluorescent material layers having a laminate structure made of two different compositions of Y.sub.2 O.sub.2 S: Eu and Y.sub.2 O.sub.3 :Eu.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: October 14, 1997
    Assignee: LG Electronics, Inc.
    Inventor: Seoug Wan Kang
  • Patent number: 5645461
    Abstract: To manufacture a cathode-ray projection tube, a glass face panel with a skirt portion is provided. The glass face panel is formed to satisfy the following formula 0.85.ltoreq.B/A, where A is a long edge length of the inner surface of the glass face panel and B is a short edge length of the inner surface of the glass face panel. Then, high and low refraction materials are alternately evaporated to form an optical multiple layered interference film having a substantially uniform thickness on the inner surface of the glass face panel.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: July 8, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yasuo Iwasaki
  • Patent number: 5640066
    Abstract: According to the present invention, there is provided a display screen having a black matrix of a multilayer structure including a fine pigment particle layer containing fine pigment particles having an average diameter of 0.005 to 0.2 .mu.m, and a black pigment layer containing black pigment particles having an average particle diameter of 0.2 to 5 .mu.m.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: June 17, 1997
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeo Itou, Hidemi Matsuda, Hajime Tanaka, Tomoko Nakazawa
  • Patent number: 5637958
    Abstract: A face plate (10) of an FED image display has a grooved rear surface (25) formed with projections (36). Projections (36) have surfaces (39) covered in regions (58, 59) with electrical conductive material (54) and different color emitting phosphor particles (56a, 56b). The regions (58, 59) define different color anode combs. Surfaces (39) in regions (61) between regions (58,59) are covered with insulative, light absorbing material (62) for absorption of ambient light. Surfaces (39) are formed to encourage forward direction of phosphor-emitted light. In one embodiment, surfaces (39) serve to channel ambient light rearwardly toward projection apexes (40) which are covered with light absorbing material (62). Projections (36) may be parallel elongated prisms, pyramids or cones.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: June 10, 1997
    Assignee: Texas Instruments Incorporated
    Inventor: Jules D. Levine
  • Patent number: 5627429
    Abstract: A color cathode ray tube includes an intermediate layer between the face plate and the tricolor phosphor layer. The intermediate layer is a selective light absorption layer or a neutral filter layer. The selective light absorbing function and the uniform light absorbing function are imparted, not to the functional film on the outer surface of the face plate, but to the intermediate layer formed on the surface of the face plate facing the electron gun, namely, on the inner surface of the face plate. The mechanical strength of the functional film is thus enhanced.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: May 6, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Yasuo Iwasaki
  • Patent number: 5616986
    Abstract: A resonant microcavity display, comprising a thin-film resonant microcavity with a phosphor active region is disclosed. The microcavity comprises: a rigid substrate; a front reflector disposed upon the rigid substrate; a phosphor active region disposed upon the front reflector; and a back reflector disposed upon the active region. The display preferentially emits light that propagates along the axis perpendicular to plane of the display, due to its quantum mechanical properties. It exhibits high external efficiency, highly controllable chromaticity, high resolution, highly directional output and highly efficient heat transfer characteristics. For these reasons it provides a suitable display element for projection screen television, high definition television, direct view television, flat panel displays, optical coupling, and other applications.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: April 1, 1997
    Assignee: University of Georgia Research Foundation, Inc.
    Inventors: Stuart M. Jacobsen, Steven M. Jaffe, Hergen Eilers, Michieal L. Jones
  • Patent number: RE37750
    Abstract: A color picture tube is disclosed, that comprises an outer sheath having a electron gun, the outer sheath being airtightly sealed, a face plate having light transmissivity and disposed on the front surface of the outer sheath, and a large number of red, blue, and green pixels regularly arranged inside the face plate, wherein the pixels have a fluorescent substance layer and a color filter, the fluorescent substance layer being lit by a radiation of an electron beam, the color filter being disposed between the fluorescent substance layer and the face palate, and wherein green pixels have a chromaticity that is plotted in the fourth quadrant of a coordinate system of a (L*a*b*) color system where a* is the horizontal axis and *b is the vertical axis when light of a standard light source C is reflected on the outside of the face plate.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: June 18, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takeo Itou, Hidemi Matsuda, Hajime Tanaka, Tomoko Nakazawa, Tsuyoshi Oyaizu