Patents by Inventor Shao-Han Chang

Shao-Han Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • LED lamp assembly
    Patent number: 7775680
    Abstract: An exemplary LED lamp assembly includes a housing (21), a printed circuit board (22), a LED (23), a light reflective member (24) and a lamp cover (25). The housing includes a top cover (211), a base board (213), a plurality of sidewalls (215) connecting with the top cover and the base board, and an opening (218) defined on one of the sidewalls. The printed circuit board is positioned on the base board. The LED is electrically connected to the printed circuit board. The LED includes a light emitting side surface (233) and a top surface (235) adjoining to the light emitting side surface, a portion of the light emitting side surface facing the opening, and the top surface facing the top cover. The light reflective member is located in the housing for reflecting light from the LED and out via the opening. The lamp cover covers the opening.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: August 17, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • METHOD FOR MAKING PRISM SHEET
    Publication number: 20100187704
    Abstract: A method for making a prism sheet includes: providing a cutting device comprising a cutter, a table plate, and a control unit, the table plate controlled to move up and down by the control unit, and the cutter having a blade rotatable; providing a mold insert preform on the table plate, the mold insert preform having a flat surface; moving the cutter to etch the flat surface of the mold insert preform along a first direction, and simultaneously driving the table plate to move up and down by the control unit in a first predetermined manner to form first elongated depressions in the flat surface; moving the cutter to etch the flat surface of the mold insert preform along a second direction to form second elongated depressions in the flat surface, thereby forming a mold insert; using the mold insert to form the prism sheet by injection molding method.
    Type: Application
    Filed: March 31, 2010
    Publication date: July 29, 2010
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: TUNG-MING HSU, SHAO-HAN CHANG
  • Optical plate and backlight module using same
    Patent number: 7758199
    Abstract: An exemplary optical plate includes a transparent main body. The transparent main body includes a first surface and a second surface. The first surface and the second surface are on opposite sides of the main body. The first surface of transparent main body defines a plurality of elongated arc-shaped grooves. The second surface defines a plurality of the elongated arc-shaped protrusions. An extending direction of the elongated arc-shaped grooves intersects with an extending direction of the elongated arc-shaped protrusions.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: July 20, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Prism sheet and backlight module the same
    Patent number: 7753565
    Abstract: An exemplary prism sheet includes a transparent main body. The main body includes a first surface, a second surface and a plurality of spherical micro-depressions and a plurality of triangular pyramidal micro-depressions. The first surface and the second surface are on opposite sides of the main body. The spherical micro-depressions are formed in the first surface and the triangular pyramidal micro-depressions are formed in the second surfaces. A backlight module using the present prism sheet is also provided.
    Type: Grant
    Filed: November 12, 2007
    Date of Patent: July 13, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tung-Ming Hsu, Shao-Han Chang
  • Prism sheet and backlight module using the same
    Patent number: 7753543
    Abstract: An exemplary prism sheet includes a transparent main body. The main body includes a first surface and a second surface. The first surface and the second surface are on opposite sides of the main body. The first surface and the second surface define a plurality of first micro-depressions and a plurality of second micro-depressions respectively. Each first micro-depression is defined by four connecting curved inner sidewalls. A transverse width of each curved inner sidewall of each first micro-depression progressively decreases with increasing distance from the first surface. Each second micro-depression is defined by four connecting inner sidewalls. A transverse width of each inner sidewall of each second micro-depression progressively decreases with increasing distance from the second surface. A backlight module using the present prism sheet is also provided.
    Type: Grant
    Filed: December 17, 2007
    Date of Patent: July 13, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tung-Ming Hsu, Shao-Han Chang
  • Prism sheet
    Patent number: 7755860
    Abstract: An exemplary prism sheet includes a first surface and a second surface opposite the first surface. The first surface defines a plurality of elongated V-shaped grooves, and the elongated V-shaped grooves are parallel to each other. The second surface defines a plurality of parallelogram microstructures. Each parallelogram microstructure defines four adjacent triangular pyramid depressions.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: July 13, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Prism sheet, method for making the same and liquid crystal display device using the same
    Patent number: 7750989
    Abstract: An exemplary prism sheet includes a transparent main body. The transparent main body has a surface. A plurality of first elongated micro-protrusions and second elongated micro-protrusions protrude from the surface of the main body. Each of the first elongated micro-protrusions extends along a first direction. Widths and heights of each of the first elongated micro-protrusions vary along the first direction. Each of the second elongated micro-protrusions extends along a second direction that intersects with the first direction. Widths and heights of each of the second elongated micro-protrusions vary along the second direction. A method for making the prism sheet and a liquid crystal display device using the prism sheet are also provided.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: July 6, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tung-Ming Hsu, Shao-Han Chang
  • Optical plate and backlight module using the same
    Publication number: 20100165663
    Abstract: An optical plate includes a first surface and a second surface opposite to the first surface. A plurality of elongated, arc-shaped depressions is defined in the first surface. A plurality of elongated, arc-shaped protrusions and a plurality of elongated, V-shaped protrusions protrude from the second surface. An extending direction of the elongated, arc-shaped protrusions intersects with an extending direction of the elongated, V-shaped protrusions. An extending direction of elongated, arc-shaped depressions is substantially parallel with the extending direction of the elongated, arc-shaped protrusions.
    Type: Application
    Filed: December 31, 2008
    Publication date: July 1, 2010
    Inventor: Shao-Han Chang
  • Prism sheet and backlight module using the same
    Patent number: 7744245
    Abstract: An exemplary prism sheet includes a transparent main body. The main body includes a first surface, a second surface and a plurality of conical frustum micro-depressions and a plurality of triangular pyramidal micro-depressions. The first surface and the second surface are on opposite sides of the main body. The conical frustum micro-depressions are formed in the first surface and the triangular pyramidal micro-depressions are formed in the second surfaces. A backlight module using the present prism sheet is also provided.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: June 29, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tung-Ming Hsu, Shao-Han Chang
  • Optical plate and backlight module using the same
    Patent number: 7740388
    Abstract: An exemplary optical plate includes a plurality of transparent plate units. The transparent plate unit includes a first surface, a second surface, a plurality of conical frustum protrusions, a diffusion layer and a lamp-receiving portion. The second surface is opposite to the first surface. The conical frustum protrusions are formed at the first surface. Each conical frustum protrusion comprises two conical frustums. The diffusion layer is formed at the second surface. The lamp-receiving portion is defined in one of the first surface and the second surface. A backlight module using the optical plate is also provided.
    Type: Grant
    Filed: December 15, 2007
    Date of Patent: June 22, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Two-layered optical plate including skewed micro-depression matrix
    Patent number: 7740383
    Abstract: An exemplary optical plate includes a transparent layer and a light diffusion layer. The transparent layer includes a light input interface, a light output surface opposite to the light input interface, and a plurality of micro-depressions formed on the light output surface. The micro-depressions are arranged along a plurality of imaginary, separate, circular arcs. Each micro-depression has at least three side surfaces connected to each other, and a transverse width of each side surface increases along a direction away from the light diffusion layer. The light diffusion layer is integrally formed in immediate contact with the light input interface of the transparent layer, and free of air or gas pockets trapped in an interface therebetween. The light diffusion layer includes a transparent matrix resin and a plurality of diffusion particles dispersed in the transparent matrix resin.
    Type: Grant
    Filed: October 22, 2007
    Date of Patent: June 22, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Optical plate and backlight module using the same
    Patent number: 7740374
    Abstract: An exemplary optical plate includes one or more transparent plate unit. The transparent plate unit includes a light output surface, a bottom surface, a plurality of spherical depressions, a plurality of enclosing V-shaped protrusions, and one or more lamp-receiving portion. The light output surface is opposite to the bottom surface. The spherical depressions are formed on the light output surface. The enclosing V-shaped protrusions are formed on the bottom surface. The lamp-receiving portion is defined in the bottom surface. A backlight module using the present optical plate is also provided.
    Type: Grant
    Filed: October 19, 2007
    Date of Patent: June 22, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Prism sheet and backlight module using the same
    Patent number: 7726827
    Abstract: An exemplary prism sheet includes a transparent main body. The main body includes a first surface and a second surface. The first surface is opposite to the second surface. A plurality of micro-depressions are defined in the first surface. A plurality of elongated arc-shaped protrusions are formed on the second surface. Each micro-depression is defined by four connecting sidewalls. A transverse width of each sidewall of each micro-depression progressively decreases with increasing distance from the second surface. A backlight module using the present prism sheet is also provided.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: June 1, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tung-Ming Hsu, Shao-Han Chang
  • Frame design and backlight system using the same
    Patent number: 7722229
    Abstract: A frame includes a main frame and a receiving frame. The main frame includes a base and several circumferential sidewalls extending from the base. At least two opposite stepped elements are defined at the top of two opposite sidewalls. Each stepped element includes a tread portion extending from the sidewall toward an inner of the main frame, a riser portion extending from the end of the tread portion toward the opening. The receiving frame includes a frame body, a rim portion extending from a bottom of the frame body toward an inner of the frame body, and at least two grooves defined in the rim portion corresponding to the two stepped elements. Each groove of the receiving frame may be inserted into the corresponding stepped element. A backlight system using the frame is also provided, which has a narrow-framed, space-saving design, and also can be assembled easily.
    Type: Grant
    Filed: August 10, 2006
    Date of Patent: May 25, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Optical plate and backlight module using the same
    Patent number: 7722241
    Abstract: An exemplary optical plate includes at least one transparent plate section. The transparent plate section includes a light output surface, a bottom surface, a plurality of spherical protrusions, a plurality of microstructures, and a lamp-receiving portion. The light output surface is opposite to the bottom surface. The spherical protrusions are formed on the light output surface. The microstructures are formed on the bottom surface. The lamp-receiving portion is defined in the bottom surface. A backlight module using the present optical plate is also provided.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: May 25, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Prism sheet and backlight module using the same
    Patent number: 7712945
    Abstract: An exemplary prism sheet includes a transparent main body. The main body includes a first surface and a second surface. The first surface is opposite to the second surface. A plurality of elongated V-shaped protrusions are formed on the first surface. A plurality of micro-depressions are defined in the second surface. Each micro-depression is defined by at least three connecting inner sidewalls. A transverse width of each inner sidewall of each micro-depression progressively decreases with increasing distance from the second surface. A backlight module using the present prism sheet is also provided.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: May 11, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Tung-Ming Hsu, Shao-Han Chang
  • Prism sheet
    Patent number: 7715132
    Abstract: An exemplary prism sheet includes a transparent main body. The transparent main body includes a first surface and a second surface. The first surface and the second surface are on opposite sides of the main body. The first surface of transparent main body defines a plurality of first elongated arc-shaped grooves and a plurality of second elongated arc-shaped grooves. The first elongated arc-shaped grooves intersect with the second elongated arc-shaped grooves. The second surface defining a plurality of rectangular structures. Each rectangular structure defining four adjacent triangular pyramid depressions.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: May 11, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Direct type backlight module with platform support for optical plate
    Patent number: 7697087
    Abstract: An exemplary backlight module (100) includes a housing (10), a reflective sheet (30), a number of point light sources (20). The housing includes a bottom plate (12) and at least one platform support (14) extending out from the bottom plate towards an interior of the housing. The reflective sheet is supported by the platform support, and defines a number of through holes (301). The point light sources are arranged in the housing corresponding to the through holes of the reflective sheet. Each point light source includes a base portion (22) and a light emitting portion (24). The base portion is secured at the bottom plate of the housing, and the light emitting portion protrudes through a corresponding one of the through holes.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: April 13, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Prism sheet and liquid crystal display device using the same
    Patent number: 7695152
    Abstract: An exemplary prism sheet includes a light input surface, a light output surface opposite to the light input surface, and a plurality of triangular pyramidal micro-elements and a plurality of hexagonal pyramidal micro-elements. The triangular pyramidal micro-elements and the hexagonal pyramidal micro-elements are formed on the light output surface. Each triangular pyramidal micro-element surrounded by three adjacent hexagonal pyramidal micro-elements. Bottom surfaces of each hexagonal pyramidal micro-element and each triangular pyramidal micro-element are coplanar with the light output surface. A liquid crystal display device using the prism sheet is also provided.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: April 13, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Optical plate and backlight module using the same
    Patent number: 7695165
    Abstract: An exemplary optical plate includes one or more transparent plate unit. The transparent plate unit includes a light output surface, a bottom surface, a plurality of elongated V-shaped protrusions, a plurality of conical frustum protrusions, and a lamp-receiving portion. The light output surface is opposite to the bottom surface. The elongated V-shaped protrusions are formed on the bottom surface. The conical frustum protrusions are formed on the light output surface. The lamp-receiving portion is defined in the bottom surface. A backlight module using the present optical plate is also provided.
    Type: Grant
    Filed: October 25, 2007
    Date of Patent: April 13, 2010
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang