Patents by Inventor Charles Leu
Charles Leu 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).
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Patent number: 7242838Abstract: A backlight module (20) includes a light guide plate (22), a light source (21), and a reflection plate (23). The light guide plate includes a light incidence surface (221) for receiving light, a light emitting surface (223) for emitting light, and a bottom surface (222). The light source is disposed adjacent the light incidence surface. The reflection plate disposed under the bottom surface includes a base (232), and a reflection layer (233) formed on the base. The reflection layer defines a number of diffraction grating units (231) at an outer surface thereof. Grating constants of the diffraction grating units progressively decrease with increasing distance away from the light incidence surface. This enables the light emitting surface to output highly uniform light. Further, if the process of fabrication of the diffraction grating units fails, only the reflection plate need be discarded. Thus the backlight module has a low mass manufacturing cost.Type: GrantFiled: November 17, 2004Date of Patent: July 10, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Tai-Cherng Yu, Charles Leu, Ga-Lane Chen
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Patent number: 7237940Abstract: A light guide plate (30) has a light incident surface (305) for receiving light, a light emitting surface (301) for emitting light, a bottom surface (303) opposite to the light emitting surface, and side surfaces (307, 309, 311). A subwavelength grating (302) is formed on the light incident surface for diffracting the light. The subwavelength grating is a zeroth-order grating which covers a wide wavelength band and diffracts the light into zeroth-order waves. So that the light guide plate has a high light utilization efficiency and yields high uniformity of outgoing light.Type: GrantFiled: December 23, 2004Date of Patent: July 3, 2007Assignee: Hon Hai Precision Industry Co. Ltd.Inventors: Tai-Cherng Yu, Charles Leu, Ga-Lane Chen
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Patent number: 7223004Abstract: A light guide plate includes two opposite incident surfaces for receiving light beams, an emitting surface joining the two incident surfaces and a bottom surface opposite to the emitting surface. The emitting surface has a V-shaped profile defined by two symmetric oblique surfaces slanting down toward each other at a predetermined angle. Further, each of the oblique surfaces defines a plurality of grooves extending therein and being arranged along an oblique direction thereof. The surface light source incorporating the light guide plate is inexpensive and has higher intensity of illumination at the center region thereof. Thus a liquid crystal display incorporating the surface light source satisfactorily illuminates a main visible range thereof.Type: GrantFiled: April 19, 2004Date of Patent: May 29, 2007Assignee: Hon Hai Precision Ind. Co., Ltd.Inventors: Ga-Lane Chen, Charles Leu
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Publication number: 20070103620Abstract: A color filter is provided. The color filter includes: a base; a black matrix arranged on the base; a grating layer arranged on the base, the grating layer comprising a plurality of grating units separated by the black matrix, the grating units being comprised of a piezoelectric material, the grating unit comprises a plurality of striated microstructures; and a controlling circuit comprising a plurality of controlling units electrically connected with the respective striated microstructures, the controlling units each being configured to apply a voltage to their corresponding striated microstructures so as to adjust a grating constant associated therewith, thereby allowing light with a predetermined wavelength to be filtered through the grating unit.Type: ApplicationFiled: May 3, 2006Publication date: May 10, 2007Applicant: HON HAI Precision Industry CO., LTD.Inventors: Charles Leu, Tai-Cherng Yu, Jhy-Chain Lin, Ga-Lane Chen
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Patent number: 7207706Abstract: A planar light source device (100) for a display device includes a light guide plate (120) and pluralities of light emitting diodes (110). The light guide plate has a light incident surface (121). The light emitting diodes are located in the vicinity of the light incident surface. Each light emitting diode has a light emission surface opposite to the light incident surface of the light guide plate, and has a diffraction grating (117) provided on the light emission surface for improving a range of divergence of light beams emitted therefrom.Type: GrantFiled: September 20, 2004Date of Patent: April 24, 2007Assignee: Hon Hai Precision Ind. Co., Ltd.Inventors: Charles Leu, Wen-Jeng Huang, Jyh-Chain Lin
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Patent number: 7206492Abstract: A light guide plate (120) includes an incidence surfaces (121), an emission surface (123) adjoining the incidence surface, and a bottom surface (122) adjoining the incidence surface and being opposite to the emission surface. The light guide plate further includes a refractive-diffractive hybrid lens array (124) formed on the emission surface. The refractive-diffractive hybrid lens array has a plurality of refractive-diffractive hybrid lenses (125). The refractive-diffractive hybrid lenses can reduce or even avoid chromatic aberration along axes thereof. This can converge emitted light beams, thereby enhancing a brightness of the emitted light beams. Thus, the light guide plate can provide good display quality. Therefore, the light guide plate can be advantageously applied in backlight modules (210) of liquid crystal display devices.Type: GrantFiled: December 9, 2005Date of Patent: April 17, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Tai-cherng Yu, Charles Leu
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Patent number: 7195390Abstract: A backlight system (300) includes a light guide plate (3024), a reflection plate (3023), a light source (3021) disposed at one side of the light guide plate, a diffusion plate (3025) and a reflection polarizer (3027), which allows light polarized in one certain direction to pass, and reflects light polarized in a direction perpendicular to said one certain direction. The diffusion plate, the light guide plate, the diffusion plate, and the reflection polarizer are stacked up one on top of the other. A plurality of prisms (11) are disposed on a surface of the diffusion plate, thereby defining a plurality of V-shaped grooves (not labeled).Type: GrantFiled: September 17, 2003Date of Patent: March 27, 2007Assignee: Hon Hai Precision Ind. Co., Ltd.Inventors: Tai-Cheng Yu, Charles Leu, Ga-Lane Chen
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Publication number: 20070054154Abstract: A magnetic recording medium includes a substrate and a magnetic granular thin film formed on the substrate. The granular thin film includes a plurality of magnetic nano-particles contained in a plurality of corresponding carbon nano-materials. The magnetic nano-particles are evenly distributed on the substrate; and each magnetic nano-particle has a magnetization direction substantially parallel to that of the other magnetic nano-particles. A related method for making a magnetic recording medium is also provided.Type: ApplicationFiled: July 18, 2006Publication date: March 8, 2007Applicant: HON HAI Precision Industry CO., LTD.Inventor: Charles Leu
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Patent number: 7183003Abstract: A thermal interface material (40) includes a silver colloid base (32), and an array of carbon nanotubes (22) disposed in the silver colloid base uniformly. The silver colloid base includes silver particles, boron nitride particles and polysynthetic oils. The silver colloid base has a first surface (42), and a second surface (44) opposite to the first surface. The carbon nanotubes are substantially parallel to each other, and extend from the first surface to the second surface. A method for manufacturing the thermal interface material includes the steps of: (a) forming an array of carbon nanotubes on a substrate; (b) immersing the carbon nanotubes in a silver colloid base; (c) solidifying the silver colloid base; and (d) peeling the solidified silver colloid base with the carbon nanotubes secured therein off from the substrate.Type: GrantFiled: July 27, 2004Date of Patent: February 27, 2007Assignee: Hon Hai Precision Ind. Co., LtdInventors: Charles Leu, Tai-Cherng Yu, Ga-Lane Chen
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Patent number: 7178966Abstract: A light guide plate (2) into which light beams are introduced from a light source has a light incident surface (21) receiving the light beams, a light emitting surface (22) transmitting the light beams therethrough, and a bottom surface (23) opposite to the light emitting surface. The light incident surface is between the bottom surface and the light emitting surface. The bottom surface has at least two sets of diffusing elements (231, 232) for diffusing and reflecting light beams toward the light emitting surface. Each set forms a continuous region at the bottom surface, and the at least two sets totally cover the bottom surface. The at least two sets of include diffusing elements that are formed along two different directions. By utilization of the at least two sets of diffusing elements, the light guide plate provides a uniform luminance over the whole of the light emitting surface.Type: GrantFiled: October 29, 2004Date of Patent: February 20, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Tai-Cherng Yu, Charles Leu, Ga-Lane Chen
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Patent number: 7175328Abstract: A light-emitting diode (LED) (10) includes a chip body (103), an encapsulation can (105) surrounding the chip body, and a base (106) supporting the encapsulation can and the chip body thereon. Numerous diffusion structures (1050) are provided on the encapsulation can, and the encapsulation can is made of a piezoelectric material for widening radiation angles of light beams emitted from the chip body. With the diffusion structures and the piezoelectric encapsulation can, light beams from the chip body are diffused and attain wider radiation angles. A backlight system (900) includes a light guide plate (20), and a number of the above-described LEDs disposed adjacent to the light guide plate. Light beams having wide radiation angles are emitted from the LEDs and enter the light guide plate. This enables a light emitting surface of the light guide plate to have highly uniform brightness.Type: GrantFiled: September 27, 2004Date of Patent: February 13, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Charles Leu, Ga-Lane Chen, Tai-Cherng Yu
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Patent number: 7168840Abstract: A light-emitting diode (LED) (110) includes a chip body (113), an encapsulation can (115) surrounding the chip body, and a base (111) supporting the encapsulation can and the chip body thereon. A diffraction grating (117) is provided at a surface of the encapsulation can, and the encapsulation can is made of a piezoelectric material for widening radiation angles of light beams emitted from the chip body. With the diffraction grating and the piezoelectric encapsulation can, light beams from the chip body are diffracted and attain wider radiation angles. A backlight system (100) includes a light guide plate (120), and a number of the above-described LEDs disposed adjacent to the light guide plate. Light beams having wide radiation angles are emitted from the LEDs and enter the light guide plate. This enables a light-emitting surface (122) of the light guide plate to have highly uniform brightness.Type: GrantFiled: October 25, 2004Date of Patent: January 30, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Charles Leu, Tai-Cherng Yu, Ga-Lane Chen
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Patent number: 7167220Abstract: A surface light source (30) has a light source (23), and a light guide plate (20) for introducing light beams from the light source out. The light guide plate includes an incident surface (211) for introducing light beams in; an emitting surface (214) for uniformly transmitting light beams out; and a bottom surface (212) opposite to the emitting surface for reflecting the light beams in directions toward the emitting surface. Furthermore, a color filter (22) is provided and disposed on the emitting surface of the light guide plate, which has a color layer (222) for a full color display.Type: GrantFiled: December 31, 2003Date of Patent: January 23, 2007Assignee: Hon Hai Precision Ind. Co., LtdInventors: Ga-lane Chen, Charles Leu
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Patent number: 7160018Abstract: A back light system (2) includes a light guide plate (50). The light guide plate includes an array of prisms (55) formed thereon, and a nano-particle layer (80) formed on the prisms for diffusing light beams propagating therethrough. The nano-particle layer contains a mass of transparent nano-particles with diameters preferably in the range from 30˜100 nm. A material of the particles may be TiO2 (titanium oxide), SiO2 (silicon dioxide), or Al2O3 (aluminum oxide). Each light beam passing through the nano-particle layer is scattered, and most of the scattering occurs over a limited range of angles. The scattered light beams exit the nano-particle layer mostly over the limited range of angles, with a medial direction of propagation in the range of angles being substantially parallel to a viewing direction. The back light system can yield high brightness and uniform luminescence, and is relatively simple in construction and inexpensive.Type: GrantFiled: September 27, 2004Date of Patent: January 9, 2007Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Ga-Lane Chen, Charles Leu
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Patent number: 7160016Abstract: A light guide plate (300) for transmitting light beams from a light source to an LCD (liquid crystal display) includes: an incident surface (301) for introducing light beams into the light guide plate; an emitting surface (303) for uniformly transmitting light beams out from the light guide plate; and a bottom surface (302) opposite to the emitting surface for reflecting the light beams in directions toward the emitting surface. The light guide plate further provides a plurality of concavities (3031) on the emitting surface, for converging the light beams into the LCD. The light guide plate is a relatively simple, single integrated structure, and can obviate the need for a brightness layer in an associated LCD device.Type: GrantFiled: December 22, 2003Date of Patent: January 9, 2007Assignee: Hon Hai Precision Ind. Co., Ltd.Inventors: Tai-Cheng Yu, Charles Leu, Ga-Lane Chen
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Patent number: 7148512Abstract: An exemplary thermal interface (40) includes a silver colloid base (32), and an array of carbon nanotubes (22) disposed in the silver colloid base uniformly. The carbon nanotubes have nanometer-scale silver filled therein, are substantially parallel to each other, and extend from a first surface (42) to a second surface (44) of the thermal interface.Type: GrantFiled: December 23, 2004Date of Patent: December 12, 2006Assignee: Hon Hai Precision Industry Co., Ltd.Inventors: Charles Leu, Tai-Cheng Yu, Ga-Lane Chen
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Patent number: 7147993Abstract: A method for fabricating a light guide plate (LGP) includes: providing a substrate (300) having a thermal stripping layer (400) and a metal layer (500) sequentially coated thereon; coating a photo-resist layer (600) on the metal layer; exposing and developing the photo-resist layer to form a photo-resist pattern (620); etching the substrate to form a metal pattern (540); removing the photo-resist pattern; disposing the substrate having the metal pattern between a case mold (720) and a cover mold (740), wherein the metal pattern faces the cover mold; sealing the cover mold and the case mold around the substrate having the metal pattern, wherein a cavity (760) is defined between the cover mold and the substrate having the metal pattern, and molding an LGP (800) in the cavity; and separating the thermal stripping layer and substrate from the LGP, such that the metal pattern remains embedded in the LGP.Type: GrantFiled: July 9, 2004Date of Patent: December 12, 2006Assignee: Hon Hai Precision Ind. Co., Ltd.Inventors: Charles Leu, Tai-Cherng Yu, Ga-Lane Chen
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Publication number: 20060254316Abstract: A method for manufacturing a gradient refractive index lens includes the steps of: putting a lens body having a desired shape into an ion implanter; vacuumizing the ion implanter; and implanting ions of a dopant material into the lens body such that the ions have a predetermined concentration gradient therein.Type: ApplicationFiled: March 24, 2006Publication date: November 16, 2006Applicant: HON HAI Precision Industry CO., LTD.Inventor: Charles Leu
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Publication number: 20060222873Abstract: A coated plastic substrate module (100) includes a plastic substrate (110), an organic coating (130), and a modulating film (120) sandwiched therebetween. The modulating film is made from partially stabilized zirconia. A method for manufacturing a coated plastic substrate module includes the following steps: providing a plastic substrate; forming a modulating film on the plastic substrate, the modulating film being made from partially stabilized zirconia; forming an organic coating on the modulating film; and annealing the treated plastic substrate having the modulating film and organic coating.Type: ApplicationFiled: December 29, 2005Publication date: October 5, 2006Applicant: HON HAI Precision Industry CO., LTD.Inventor: Charles Leu
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Publication number: 20060213227Abstract: The present invention provides a mold (10) for press molding articles, such as optical lenses. The mold includes a molding base (11) and a surface film (12). The molding base is made by a sintered composite of carbon nano fibers (13) and metal nano particles (14). The nano metal particles are selected from a group consisting of platinum, platinum-iridium alloy, rhenium and rhenium-iridium alloy. The surface film is formed on the molding base by a sputtering deposition method. A method for manufacturing the above-described mold is also provided. The mold has higher mechanical strength and better toughness than conventional molds that are made by metal alloy or metal ceramics.Type: ApplicationFiled: December 29, 2005Publication date: September 28, 2006Applicant: HON HAI Precision Industry CO., LTD.Inventor: Charles Leu