Exposing Multicolor Cathode-ray Tube Targets Patents (Class 396/546)
  • Patent number: 10830875
    Abstract: An auxiliary apparatus for a lighthouse positioning system is provided. The lighthouse positioning system includes a first positioning base station and a second positioning base station, wherein the first positioning base station includes a first signal transmitter and a second signal transmitter and the second positioning base station includes a first signal transmitter and a second signal transmitter. The auxiliary apparatus calculates a first signal time sequence of the first signal transmitters, calculates a second signal time sequence of the second signal transmitters, and determines a third signal time sequence according to the first signal time sequence and the second signal time sequence. The third signal time sequence is not overlapped with the first signal time sequence and the second signal time sequence. The auxiliary apparatus transmits a plurality of signals according to the third signal time sequence.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: November 10, 2020
    Assignee: HTC CORPORATION
    Inventors: Iok-Kan Choi, Tsung-Han Wu, Kuang-Wei Lin
  • Patent number: 10509221
    Abstract: A holographic display device and holographic display method are provided. The holographic display device includes at least one light-source generator. The light-source generator includes: at least one laser device, configured to irradiate laser light; at least one light expander, configured to expand the laser light from the at least one laser device into a plurality of beams of light; and at least one light condenser, configured to condense the plurality of beams of light from the at least one light expander to generate a pair of virtual light sources capable of alternately emitting light at a predetermined frequency.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: December 17, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Bei Niu
  • Patent number: 9080865
    Abstract: The present invention provides an orthogonality compensation method for length measurement device, including: providing a measuring platform and a plurality of alignment marks, wherein the measuring platform comprises a chassis, a rectangular measuring table mounted on the chassis, an inspection microscope arranged above the measuring table, and a laser device mounted on the chassis and coupled to the inspection microscope; mounting the alignment marks on the measuring table and recording the coordinates of the alignment marks with respect to the coordinate system of the measuring table to provide reference coordinates; using the inspection microscope to read actual coordinates of the alignment marks with respect to the coordinate system of the measuring table and comparing the actual coordinates with the reference coordinates; and carrying out correction of coordinates if differences exist between the actual coordinates and the reference coordinates, so as to make the actual coordinates equal to the referenc
    Type: Grant
    Filed: January 6, 2013
    Date of Patent: July 14, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Yungyu Lin
  • Patent number: 7471894
    Abstract: A correction filter used in the exposure for forming a phosphor screen includes three kinds of correction filters consisting of a grading filter, a monochroic local correction filter and a multi-color local correction filter. With the use of three kinds of correction filters, it is possible to improve the whiteness uniformity which may be degraded due to the wall thickness difference at the center and a peripheral portion of a panel portion of a flat-face-type color cathode ray tube.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: December 30, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoichi Ito, Satoshi Muto
  • Patent number: 7450842
    Abstract: In an exposure step for forming a phosphor screen of a color cathode ray tube, correction lenses which are arranged between a light source and a panel are used in a state that a common correction lens which is used in common for three colors and three kinds of monochroic correction lenses are combined. The present invention can, in a flat-face-type color cathode ray tube, prevent the generation of the mislanding attributed to the difference in a wall thickness between a center portion and a peripheral portion of a panel thus improving the color purity.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: November 11, 2008
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yoichi Ito, Satoshi Muto
  • Publication number: 20080193123
    Abstract: A method for calibration and/or compensation in transference of digital and/or analogue motion pictures to a photosensitive material comprises exposing a section of a photosensitive material by modulating light from a light source and imaging the modulated light onto the photosensitive material, develop the section of the photosensitive material, measure the characteristics of the developed film while illuminated by the said light source, and adjusting the light source and/or light modulation according to the measurement. By using the same light source for exposing and measuring the film, good reproducibility can be achieved, as well as a reliable basis for the adjustments.
    Type: Application
    Filed: September 9, 2005
    Publication date: August 14, 2008
    Applicant: Mitsubishi Cable Industries, Ltd
    Inventor: Rune Bjerkestrand
  • Patent number: 7088918
    Abstract: A mounting device for a camera with automatic exposure mode to an optical system is disclosed. An adapter tube has a first and a second end, wherein the first end is attached to the camera and the second end is attached to the optical system. A mounting element, provided at the first end, provides the mechanical connection to the camera. A plurality of electric contact pins, located at the first end, cooperates with respective electric contacts provided at the camera.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: August 8, 2006
    Assignee: Leica Microsystems (Schweiz) AG
    Inventor: Randolph Spencer
  • Patent number: 6469842
    Abstract: An apparatus for patterning a phosphor screen on the faceplate of a cathode-ray tube has a main lens that refracts light to simulate electron-beam trajectories. The main lens includes a fixed lens with a curved surface, and at least one replaceable flat element. The apparatus also has at least one sub-lens, with a curved surface, that can be substituted for the flat element to compensate for inaccurate simulation of the electron-beam trajectories. The flat element and the sub-lens have the same thickness, so that substitution of the one for the other does not produce an unintended shifting of light paths. Preferred sub-lenses include lenses having surfaces described by a bilaterally symmetric cosine function, and by a product of a sine function and a linear function.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: October 22, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroshi Teramoto, Nobuyuki Zumoto, Shigeru Nishimoto, Takayuki Hirano
  • Patent number: 6447963
    Abstract: A light quantity correction filter that can implement the desired transmittance distribution precisely and easily without complicating an exposure system, a method of making the light quantity correction filter, and a method of manufacturing a color cathode ray tube using the light quantity correction filter are provided.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: September 10, 2002
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Hiromi Wakasono
  • Patent number: 6421507
    Abstract: A screen having a dotted structure of apertures in a black matrix and electroluminescent material in the apertures is produced on a panel for a color display device. A photosensitive material on the panel is exposed to light emitted by a point source. The light is passed through a segmented lens and a mask. The segmented lens has an array of facets with boundaries between them. At least two of the facets have respective top surfaces inclined at mutually different angles. Each facet of the array of facets is provided with a light-refracting means having a base surface coinciding with its top surface and at least a first and a second light-refracting surface disposed at predetermined angles with respect to the base surface, thereby creating a number of virtual light sources corresponding to the number of light-refracting surfaces.
    Type: Grant
    Filed: April 14, 2000
    Date of Patent: July 16, 2002
    Assignee: Koninklijke Philips Electronics N.V.
    Inventor: Tewe H. Heemstra
  • Publication number: 20010055489
    Abstract: In the manufacturing process of colour display tubes with a dotted screen pattern, to form the screen (11), a segmented lens (3) is used for exposing the display window (4) in order to apply a structure of a black matrix layer and a layer with electroluminescent material to it. Principally, a segmented lens (3) gives rise to a phenomenon that is called facet marking; this is a result of the fact that the images of consecutive facets (12) of the lens on the screen (11) are disjunct or partly overlap, giving dark lines (42) or bright lines (44). In present day colour display tubes—especially for use as computer monitors—it is getting more and more important to reduce facet marking as far as possible. It is proposed to manufacture the segmented lens (3) according to a new process in which the mould (30) for the manufacture of said segmented lens is significantly changed.
    Type: Application
    Filed: June 25, 2001
    Publication date: December 27, 2001
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Tewe Hiepke Heemstra, Tiemen Poorter
  • Patent number: 6300021
    Abstract: The invention includes an apparatus 40 for developing a latent charge image formed on a photoreceptor 36 disposed on an interior surface of a faceplate panel 12. The apparatus 40 comprises a developer tank 42 having a sidewall 44 closed at one end by a bottom portion 46 and at the other end by a panel support 48 having an opening 50 therethrough to provide access to the faceplate panel 12. A back electrode 52 has a potential applied thereto to establish an electrostatic drift field between the back electrode and the photoreceptor 36, which is grounded. Triboelectrically-charged, dry-powdered, light emitting phosphor material, having a charge of the same polarity as the potential applied to the back electrode 52, is sprayed into the developer tank 42, between the back electrode 52 and the faceplate panel 12. The triboelectrically charged phosphor material is directed toward the photoreceptor 36 on the faceplate panel 12 by the applied electrostatic drift field.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: October 9, 2001
    Assignee: Thomson Licensing S.A.
    Inventors: Istvan Gorog, David Paul Ciampa
  • Publication number: 20010002950
    Abstract: An exposure device includes a support for supporting a panel, a light source unit for radiating a light beam onto the panel through a shadow mask, and optical lenses for correcting the trajectory of the light beam from the light source unit. The light source unit is movable between three positions corresponding individually to the positions of emission of the three electron beams from the electron gun, and is inclined when the light source unit is moved to the position corresponding to each side beam. One of the optical lenses is shaped so that a space in the pattern at an end portion of the vertical axis of the panel is changed relatively to a space in the pattern in the center of the panel when the screen forming layer is printed with the light source unit moved to the position corresponding to each side beam.
    Type: Application
    Filed: December 7, 2000
    Publication date: June 7, 2001
    Inventor: Hiroaki Ibuki
  • Patent number: 6013400
    Abstract: The invention relates to a method of manufacturing a luminescent screen structure 22 with a light-absorbing matrix 23, having a plurality of substantially equally sized openings therein, on an inner surface of a CRT faceplate panel 12. A color selection electrode 24 is spaced a distance, Q, from the inner surface. The method includes providing a first photoresist layer 50, whose solubility is altered when it is exposed to light, on the inner surface of the faceplate panel 12. The first photoresist layer 50 is exposed to light from two symmetrically located source positions +G and -G, relative to a central source position, 0. Then the more soluble regions 54 of the photoresist layer 50 are removed, overcoated with a light-absorbing material 58 and developed to remove the retained, less soluble regions 52 of the first photoresist layer with the light-absorbing material thereon. First guardbands 60 of light-absorbing material remain on the interior surface of the faceplate panel 12.
    Type: Grant
    Filed: February 9, 1998
    Date of Patent: January 11, 2000
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Richard LaPeruta, Istvan Gorog
  • Patent number: 6007952
    Abstract: The invention includes an apparatus 40, 140 for developing a latent charge image formed on a photoreceptor 36 disposed on an interior surface of a faceplate panel 12. The apparatus 40, 140 comprises a developer tank 42 having a sidewall 44 closed at one end by a bottom portion 46 and at the other end by a panel support 48 having an opening 50 therethrough to provide access to the faceplate panel 12. The back electrode 52 has a potential applied thereto to establish an electrostatic drift field between the back electrode and the photoreceptor 36, which is grounded. Triboelectrically-charged, dry-powdered, light emitting phosphor material, having a charge of the same polarity as the potential applied to the back electrode 52, is injected into the developer tank 42, between the back electrode 52 and the faceplate panel 12. The triboelectrically-charged phosphor material is directed toward the photoreceptor 36 on the faceplate panel 12 by the applied electrostatic drift field.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: December 28, 1999
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: David Paul Ciampa, Istvan Gorog, Peter Michael Ritt, Owen Hugh Roberts, Jr., Leonard Pratt Wilbur, Jr.
  • Patent number: 5991554
    Abstract: An exposure apparatus for exposing a phosphor screen of a cathode ray tube includes a light source portion having an elongate light source lamp and a shading member arranged to face the lamp. The shading member is formed with a slit through which a light beam from the lamp passes. The slit is formed in a V-shaped configuration in which it protrudes toward the light source lamp. The shading member is formed such that a cross section thereof in the direction in parallel to the axis of the light source lamp has a wedge-like shape in which the thickness increases from the edge of the slit toward the end thereof in the direction of the axis, and such that a cross section in a direction perpendicular to the axis has a uniform thickness at the position of the slit.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: November 23, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tetsuya Masumura, Katsumi Omote
  • Patent number: 5976739
    Abstract: A method of developing a screen of a cathode ray tube includes the steps of establishing an uniform electrostatic charge on selected areas of an inner surface of a panel with a predetermined pattern, rotating a nozzle to a predetermined angle with respect to the inner surface of a panel, and moving the rotated nozzle backwards and forwards while spraying a dry-powdered and electrically charged screen structure material on the selected areas of the inner surface of the panel.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: November 2, 1999
    Assignee: Samsung Display Devices Co., Ltd.
    Inventors: Yang-hee Lee, Chae-bok Lim, Jong-ho Cho
  • Patent number: 5946519
    Abstract: Apparatus for use as a lighthouse in the manufacture of a color cathode ray tube (CRT) includes a housing with a cover lens. Disposed within the housing is a light source assembly including a light source in the form of a cylindrical shaped mercury lamp and an optical aperture closely spaced to the mercury lamp. The mercury lamp directs light through the optical aperture as well as through the cover lens onto the inner surface of the CRT's glass faceplate in a photo-stenciling process for registering, or aligning, phosphor dots on the faceplate's inner surface with electron beam passing apertures in the CRT's color selection electrode, or shadow mask. The optical aperture is elongated, with its longitudinal axis aligned generally transverse to the longitudinal axis of the mercury lamp, and is curvilinear having from two (2) to eight (8) inflection points along its length.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: August 31, 1999
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chih-Chien Chao, Chun-Hsiung Yen, Ying-Hung Chuang, Keh-Chung Su
  • Patent number: 5876884
    Abstract: An exposure process of a pattern on a transparent substrate of a plasma display panel is conducted on a flat principal surface of stage in which a depression is formed for accommodating an alignment optical source, wherein a movable shutter is provided on the stage so as to be movable in a plane substantially flush to the principal surface of the stage.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: March 2, 1999
    Assignee: Fujitsu Limited
    Inventors: Ryuji Maeda, Mitsugu Uemura, Masahiro Uraguchi
  • Patent number: 5844355
    Abstract: A color cathode-ray tube having a good quality of display screen in which a fluorescent dot pattern is formed to have good configuration and positional accuracies.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: December 1, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Ying-Fu Wang, Takashi Nishiguchi
  • Patent number: 5822130
    Abstract: Light radiated from a light source is gathered by an oval mirror. The gathered light is incident on one end of a rod-shaped optical integrator, integrated and made uniform within the optical integrator, and is radiated from the other end of the optical integrator. The light from the optical integrator is diffused and projected on an exposure area of a display tube by a lens system. The lens system presents an astigmatism, thereby forming a first virtual focus and a second virtual focus on its virtual image area. The diffused light is apparently diffused vertically at the first virtual focus and apparently diffused horizontally at the second virtual focus. The first vertical focus and the second vertical focus correspond respectively in position to the positions of the vertical deflection means and horizontal deflection means of the display tube.
    Type: Grant
    Filed: March 8, 1996
    Date of Patent: October 13, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Nagano, Takashi Inoue, Kazuo Ueno, Shohroh Mochida, Shuji Ueda, Osamu Adachi
  • Patent number: 5807436
    Abstract: A technique for uniformly depositing particles, especially phosphor particles, onto a display panel and an apparatus for carrying out this technique are set forth in this application. This technique relies on both electrostatically and pneumatically passing charged particles to the display panel so that a uniform coating takes place both on the flat surfaces and on the curved surfaces.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: September 15, 1998
    Inventors: Gustav A. Stachelhaus, Gary S. Gielincki
  • Patent number: 5790913
    Abstract: In accordance with the present invention, a method for manufacturing a color CRT (10) having a faceplate panel (12) is disclosed. The method includes the steps of forming a photoreceptor (36) on an interior surface of a viewing faceplate (17); establishing a substantially uniform electrostatic charge on the photoreceptor (36); and exposing selected areas of the photoreceptor (36) to visible light to form a latent charge image. The process further includes the steps of developing the latent charge image on the photoreceptor (36) by depositing (212, 213, 214) thereon charged phosphor particles; monitoring the width (218) of the deposition of the charged phosphor particles; and terminating the deposition (226, 227, 228) of the charged phosphor particles when predetermined process parameters (222, 224) are satisfied. A phosphor deposition monitor (PDM) apparatus (90) for monitoring the deposition of the charged phosphor particles on the latent charge image, formed on the photoreceptor (36), also is described.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: August 4, 1998
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Owen Hugh Roberts, Jr., Peter Michael Ritt, Peter David Southgate, Robert Anthony Duschl
  • Patent number: 5744270
    Abstract: The novel method for producing a coded marking on a CRT faceplate panel having an exterior and an interior surface with a viewing area surrounded by a periphery and having a luminescent screen with a plurality of different light-emitting phosphors separated by light-absorbing material includes the steps of: depositing a suitable photoresist on the interior surface of the panel to form a layer that extends across the viewing area and onto the periphery; illuminating areas of the photoresist on both the viewing area and the periphery with actinic radiation to selectively change the solubility of the photoresist; developing the photoresist to remove the more soluble areas, thereby exposing underlying portions of the interior surface of the panel while leaving retained areas of less soluble photoresist. The retained areas of the photoresist and the exposed portions of the interior surface of the panel are then overcoated with a light-absorbing material which is dried to form a coating.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: April 28, 1998
    Assignee: Thomson Consumer Electronics, Inc.
    Inventors: Samuel Pearlman, Robert Anthony Duschl, Anthony Stanley Baran, Glenn William Brunner, George Simon Gadbois, Frank Thomas DiAugustine
  • Patent number: 5742864
    Abstract: An exposure apparatus includes a light source a range gauge, which refracts the light emitted from the light source at a fixed angle and a filter gauge that projects the light passing through the range gauge in different amounts to the circumference and center of the panel. The exposure further includes a reflection member fixed outside the panel which re-directs the light that passes through the panel so that it can be used again for exposure.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: April 21, 1998
    Assignee: Samsung Display Devices Co., Ltd.
    Inventor: Jongseop Kwack