Patents Represented by Attorney Edwin Oh
  • Patent number: 8177381
    Abstract: The present invention provides an integrated backlight illumination assembly for an LCD display comprising, a plurality of solid state light sources for providing a point light source and a plurality of light guide films having light redirecting areas provided between the plurality of solid state light sources for redirecting and spreading the point light sources to a uniform plane of light. The invention further provides at least one polymer diffusion bar covering said solid state light sources and spacer collar rings comprising an optical spacer, collar section and an anchoring feature, wherein the spacer collar rings are located around a perimeter of the diffusion bar.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: May 15, 2012
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Qi Hong, Herong Lei, Robert P. Bourdelais
  • Patent number: 8153279
    Abstract: Provided are novel organic electroluminescent compounds, and organic electroluminescent devices and organic solar cells employing the same. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): wherein, A, B, C and D independently represent CR5 or N, provided that A, B, C and D cannot represent CR5 all at the same time. Since the organic electroluminescent compounds according to the invention have good luminous efficiency and excellent color purity and life property of material, OLED's having very good operation life can be manufactured therefrom.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: April 10, 2012
    Assignee: Gracel Display Inc.
    Inventors: Sung Jin Eum, Young Jun Cho, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Patent number: 8143781
    Abstract: The present invention relates to an organic electroluminescent compound containing fluorenyl group and a display device using the same, more precisely the organic electroluminescent compound. The organic electroluminescent compound of the present invention is characterized by upgraded excellent EL property compared with the conventional host materials.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: March 27, 2012
    Assignee: Rohm and Haas Electronic Materials Korea Ltd.
    Inventors: Sung Min Kim, Bong Ok Kim, Mi Young Kwak, Hyuck Joo Kwon, Young Jun Cho, Hyun Kim
  • Patent number: 8047669
    Abstract: A uniform light source having a substrate for providing structural and functional support to the assembly. A bottom reflector provided on the substrate. A plurality of solid state light sources provided in an opening of the bottom reflector for providing a point light source. A plurality of light films and having light redirecting areas provided between the plurality of solid state light sources for redirecting and spreading the point light source to a uniform plane of light; a joining clip comprising a top capping portion and a bottom support portion, the bottom support portion being aligned perpendicular to the top capping portion and having a height sufficient to house the plurality of light films. A top diffuser for diffusing the uniform plane of light. The plurality of light films has a thickness between 0.1 mm to 1.0 mm. In addition, the joining clip further comprises a light diffusion means.
    Type: Grant
    Filed: July 31, 2009
    Date of Patent: November 1, 2011
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Robert P. Bourdelais, John C. Brewer, Qi Hong, Charles M. Rankin, Jr., Leonard S. Gates
  • Patent number: 7957082
    Abstract: The present invention provides a light redirecting article for redirecting light toward a target angle, the light redirecting article comprising: an input surface comprising a plurality of light redirecting structures each light redirecting structure having a near surface having two slopes, sloping away from normal in one direction as defined by a first inclination base angle ?1, a second inclination angle ?2, and a first half apex angle ?2, for accepting incident illumination over a range of incident angles and a far surface sloping away from normal, in the opposite direction relative to the input surface, as defined by a second base angle ?1 and a second half apex angle ?1. The invention further provides an output surface opposing to the input surface wherein the near and far surfaces are opposed to each other at an angle (?1+?2) that is in the range from 60 to 70 degrees, and the base angle ?1 is in the range from 82 to 87 degrees.
    Type: Grant
    Filed: October 3, 2007
    Date of Patent: June 7, 2011
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Xiang-Dong Mi, Xinyu Zhu
  • Patent number: 7906228
    Abstract: The present invention relates to novel compounds for electronic material, and organic electroluminescent devices or organic solar cells comprising the same. Specifically, the compounds for electronic material according to the invention are characterized in that they are represented by Chemical Formula (1): Since the compounds for electronic material, when being applied to an organic electroluminescent device, show good luminous efficiency and excellent life property of material, OLED's having very good operation life can be manufactured therefrom.
    Type: Grant
    Filed: April 17, 2009
    Date of Patent: March 15, 2011
    Assignee: Gracel Display Inc.
    Inventors: Mi Ae Lee, Young Jun Cho, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Patent number: 7888863
    Abstract: The present invention relates to novel organic electroluminescent compounds, and organic electroluminescent devices employing the same as electroluminescent material. Specifically, the organic electroluminescent compounds according to the invention are characterized in that they are represented by Chemical Formula (1): wherein, A and B independently represent CR7 or N, provided that both A and B cannot be CR7 or N at the same time; and X is O or S.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: February 15, 2011
    Assignee: Gracel Display Inc.
    Inventors: Hyo Nim Shin, Young Jun Cho, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Patent number: 7852559
    Abstract: The present invention provides a diffusely-reflecting polarizer comprising: a first polymer which is amorphous and having a birefringence of less than about 0.02 and a second polymer, the first polymer being a continuous phase, and the second polymer being a disperse phase whose index of refraction differs from said continuous phase by greater than about 0.05 along a first axis and by less than about 0.05 along a second axis orthogonal to said first axis; wherein the diffuse-reflectivity of said first and second polymers taken together along at least one axis for at least one polarization state of electromagnetic radiation is at least about 50%, the diffuse transmittance of said first and second polymers taken together along at least one axis for at least one polarization state of electromagnetic radiation is at least about 50%.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: December 14, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Xiang-Dong Mi, Jehuda Greener, Charles C. Anderson, Thomas M. Laney
  • Patent number: 7845826
    Abstract: The present invention provides a multilayered integrated backlight illumination assembly for an LCD display comprising a substrate for providing structural and functional support to the assembly, a bottom reflector provided on the substrate and a plurality of solid state light sources provided in an opening of the bottom reflector for providing a point light source. The invention further provides a plurality of primary light films having light redirecting areas provided between the plurality of solid state light sources for redirecting and spreading the point light source to a uniform plane of light, a plurality of secondary light films having light redirecting areas provided between the plurality of solid state light sources for redirecting and spreading the point light source to a uniform plane of light and a binding means for binding the primary and secondary light films together.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: December 7, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Peter T. Aylward, John C. Brewer, Robert P. Bourdelais, Qi Hong
  • Patent number: 7780330
    Abstract: A solid waveguide comprises opposite TIR surfaces further comprising: a) at least one light input surface for coupling light from a solid state light source; b) at least one mixing section; c) at least one light emitting surface; and d) a desired pattern of light redirecting features located on one TIR surface or between the TIR surfaces.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: August 24, 2010
    Assignee: Rohm and Haas Electronics Materials LLC
    Inventors: Peter T. Aylward, Robert P. Bourdelais, Qi Hong, John M. Palmeri, Leonard S. Gates
  • Patent number: 7775700
    Abstract: The invention generally relates to an optical turning film for providing light redirection, comprising: (a) an input surface for accepting incident light comprising a plurality of roof prism structures arranged in a two-dimensional array; and, (b) a substantially planar output surface.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: August 17, 2010
    Assignee: Rohm and Haas Electronics Materials LLC
    Inventor: Junwon Lee
  • Patent number: 7772174
    Abstract: Compositions useful for removing a polymer material from a substrate, such as an electronic device, and methods of using such compositions are provided. These compositions and methods reduce the corrosion of any underlying metal surfaces, and are particularly suited to remove polymer residues from electronic device substrates.
    Type: Grant
    Filed: August 11, 2006
    Date of Patent: August 10, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventor: Shinji Satoh
  • Patent number: 7722790
    Abstract: An LC display comprises in order (a) a light source, (b) a transparent polymeric film bearing on the light exit surface of the film an array of close-packed convex microlenses having a distribution of sizes and oriented in one direction, whereby the light output is preferentially spread in a desired direction, and (c) an LC panel. A related process and film are also disclosed.
    Type: Grant
    Filed: June 14, 2007
    Date of Patent: May 25, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Chari Krishnan, Charles W. Lander, Ronald J. Sudol, Jin-Shan Wang, Charles M. Rankin, Jr., Paul D. Yacobucci
  • Patent number: 7723520
    Abstract: The present invention relates to novel red phosphorescent compounds exhibiting high luminous efficiency, and organic electroluminescent devices comprising the same.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: May 25, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Hyun Kim, Young Jun Cho, Hyuck Joo Kwon, Bong Ok Kim, Sung Min Kim, Seung Soo Yoon
  • Patent number: 7661862
    Abstract: A backlight apparatus for directing light toward a display panel and the resulting display device comprises an elongated illuminator that is disposed to direct light towards the display panel and a light diffusing element for uniformizing the light redirected from the two or more elongated illuminators to provide backlight illumination. Such an apparatus provides a more even light distribution to the display.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: February 16, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Junwon Lee, Marek W. Kowarz, Peter T. Aylward, Qi Hong, Randall H. Wilson
  • Patent number: 7663712
    Abstract: This invention relates to a display apparatus comprising: a) a light source; b) a light guiding plate for transmitting light from the light source outward from a two-dimensional light-providing surface, one dimension of the light-providing surface defined in a width direction orthogonal to the path of incident light from the light source defined in a width direction orthogonal to the path of incident light from the light source and the other dimension of the light-providing surface defined in a length direction, orthogonal to the width direction; c) a linear divergence reduction surface for reducing the divergence of light from the light providing surface predominantly with respect to the width direction, to provide a linearly divergence-reduced illumination, whereby divergence along the width direction at full-width half-maximum is less than about 50% of divergence at full-width half-maximum along the length direction; d) a liquid crystal display component for modulating the linearly divergence-reduced light
    Type: Grant
    Filed: October 10, 2005
    Date of Patent: February 16, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventor: Junwon Lee
  • Patent number: 7662078
    Abstract: The present invention provides a method for creating uniform pressure at a nip comprising the acts of providing a stationary inner core, pivotally mounting a plurality of shoes to the stationary inner core, creating a plurality of annular chambers wherein each of the shoes occupies one of the chambers. In addition, the method further provides filling each of the chambers with a magneto-rheological fluid, surrounding the plurality of chambers, shoes, and stationary inner core with a thin, metal, rotatable shell; detecting a deformation in the shell and changing a magnetic field in at least one of the chambers to change a viscosity of the magneto-rheological fluid to correct the deformation.
    Type: Grant
    Filed: June 4, 2007
    Date of Patent: February 16, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Richard D. Bomba, Nelson A. Blish
  • Patent number: 7646453
    Abstract: A reflective polarizer contains: (a) a light-entrance medium having a light-entrance surface and a microstructured surface with a series of prismatic structures, wherein first and second sidewalls of each prismatic structure have an inclination angle of more than 53 degrees with respect to the light-entrance surface; (b) a polarization-selective thin film optical coating on the series of prismatic structures, for transmitting a first polarization of light and reflecting a second polarization; and (c) a light-exit medium on the polarization-selective thin film optical coating that provides a smooth light-exit surface.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: January 12, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Marek W. Kowarz, Jehuda Greener, Charles C. Anderson
  • Patent number: 7643218
    Abstract: The invention relates to a light redirecting film comprising a thin optically transparent substrate having opposite sides, one side of the substrate substantially covered by elongated individual optical elements whose longest dimensions are substantially aligned in a lengthwise direction, wherein the shape of at least some of the optical elements have a visually significant difference, and wherein the layout of optical element shapes and locations is such that objectionable patterns are not visible in the film under standard LCD backlight viewing conditions.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: January 5, 2010
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Randall H. Wilson, Paul J. Guiguizian, Robert P. Bourdelais
  • Patent number: 7633679
    Abstract: A light redirecting article redirects light toward a target angle. The light redirecting article is made from a material having a refractive index greater than 1.6. The light redirecting article has an input surface for accepting incident illumination over a range of incident angles and an output surface with a plurality of light redirecting structures, each light redirecting structure having a near surface and an exit surface for emitting an output light at an emitted light angle, wherein the exit surface is at an oblique angle relative to the plane of the input surface. For incident illumination at either of at least two different principal angles, each principal angle being greater than 60 degrees from normal and the principal angles having a difference of 5 degrees or greater, the emitted light angle is within 5 degrees of the target angle.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: December 15, 2009
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventor: Xiang-Dong Mi