Patents by Inventor Liang-Yu Yao

Liang-Yu Yao 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).

  • Patent number: 9383504
    Abstract: A backlit keyboard includes a keyboard module having a plurality of key units and a light guide module including a light guide plate, a metal layer, and an insulation layer. The light guide plate has a light-exit surface and a bottom surface. The metal layer has an upper surface and a lower surface, wherein the upper surface is attached to the bottom surface of the light guide plate. When light is incident onto the upper surface of the metal layer, the light will be reflected back into the light guide plate. When electromagnetic wave reaches the lower surface of the metal layer, the metal layer will shield the electromagnetic wave from propagating. The insulation layer substantially covers the lower surface of the metal layer, wherein at least one ground window is formed in the insulation layer to expose the metal layer.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: July 5, 2016
    Assignees: DARFON ELECTRONICS (SUZHOU) CO., LTD., DARFON ELECTRONICS CORP.
    Inventors: Liang-Yu Yao, Hsin-Cheng Ho, Yu-Ching Ting
  • Patent number: 9269509
    Abstract: A backlight module is used in a lighting keyboard. The backlight module includes a light guiding plate and a masking. The masking is disposed on the light guiding plate. The masking includes a support layer, a cover layer and a reflective layer. The support layer includes a first surface and a second surface opposite to the first surface. The cover layer is disposed on the first surface. The cover layer includes a first opening. The reflective layer is disposed on the second surface and faces the light guiding plate for reflecting light emitted from the light guiding plate, so as to enhance lighting efficiency on the first opening. The reflective layer includes a second opening. A shape and a position of the second opening are respectively corresponding to a shape and a position of the first opening.
    Type: Grant
    Filed: August 19, 2015
    Date of Patent: February 23, 2016
    Assignee: DARFON ELECTRONICS CORP.
    Inventors: Hsin-Cheng Ho, Liang-Yu Yao
  • Publication number: 20150364275
    Abstract: A backlight module is used in a lighting keyboard. The backlight module includes a light guiding plate and a masking. The masking is disposed on the light guiding plate. The masking includes a support layer, a cover layer and a reflective layer. The support layer includes a first surface and a second surface opposite to the first surface. The cover layer is disposed on the first surface. The cover layer includes a first opening. The reflective layer is disposed on the second surface and faces the light guiding plate for reflecting light emitted from the light guiding plate, so as to enhance lighting efficiency on the first opening. The reflective layer includes a second opening. A shape and a position of the second opening are respectively corresponding to a shape and a position of the first opening.
    Type: Application
    Filed: August 19, 2015
    Publication date: December 17, 2015
    Inventors: Hsin-Cheng Ho, Liang-Yu Yao
  • Patent number: 9182533
    Abstract: A light guide plate structure includes a light guide plate, a first medium layer, a micro structure, a second medium layer, and a reflection layer. The light guide plate has a light exit surface and a bottom surface opposite to the light exit surface. The first medium layer is formed on the light exit surface. The micro structure is formed on the bottom surface for redirecting light inside the light guide plate to emit from the light exit surface. The second medium layer is formed on the micro structure. The refractive index of the first medium layer and the refractive index of the second medium layer are less than the refractive index of the light guide plate but greater than the refractive index of air. The reflection layer is formed on the second medium layer for reflecting light inside the light guide plate to emit from the light exit surface.
    Type: Grant
    Filed: October 29, 2013
    Date of Patent: November 10, 2015
    Assignees: DARFON ELECTRONICS (SUZHOU) CO., LTD., DARFON ELECTRONICS CORP.
    Inventors: Liang-Yu Yao, Hsin-Cheng Ho, Yen-Chang Chen
  • Patent number: 8950881
    Abstract: A backlight module includes a light guide plate, a light source, a light shielding sheet, a light reflecting sheet and a light shielding member. The light guide plate has a hole formed thereon and the hole has a side wall. The light source is disposed neighboring to the light guide plate and used for emitting light into the light guide plate. The light shielding sheet is disposed on the light guide plate. The light reflecting sheet is disposed below the light guide plate. The light shielding member is disposed in the hole and covers the side wall of the hole, so as to block the light guided by the light guide plate from being emitted out of the hole.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: February 10, 2015
    Assignees: Darfon Electronics (Suzhou) Co., Ltd., Darfon Electronics Corp.
    Inventors: Yen-Chang Chen, Liang-Yu Yao, Hsin-Cheng Ho
  • Publication number: 20140334125
    Abstract: A backlit keyboard includes a keyboard module having a plurality of key units and a light guide module including a light guide plate, a metal layer, and an insulation layer. The light guide plate has a light-exit surface and a bottom surface. The metal layer has an upper surface and a lower surface, wherein the upper surface is attached to the bottom surface of the light guide plate. When light is incident onto the upper surface of the metal layer, the light will be reflected back into the light guide plate. When electromagnetic wave reaches the lower surface of the metal layer, the metal layer will shield the electromagnetic wave from propagating. The insulation layer substantially covers the lower surface of the metal layer, wherein at least one ground window is formed in the insulation layer to expose the metal layer.
    Type: Application
    Filed: May 8, 2014
    Publication date: November 13, 2014
    Applicants: DARFON ELECTRONICS (SUZHOU) CO., LTD., DARFON ELECTRONICS CORP.
    Inventors: Liang-Yu Yao, Hsin-Cheng Ho, Yu-Ching Ting
  • Publication number: 20140160722
    Abstract: A backlight module is used in a lighting keyboard. The backlight module includes a light guiding plate and a masking. The masking is disposed on the light guiding plate. The masking includes a support layer, a cover layer and a reflective layer. The support layer includes a first surface and a second surface opposite to the first surface. The cover layer is disposed on the first surface. The cover layer includes a first opening. The reflective layer is disposed on the second surface and faces the light guiding plate for reflecting light emitted from the light guiding plate, so as to enhance lighting efficiency on the first opening. The reflective layer includes a second opening. A shape and a position of the second opening are respectively corresponding to a shape and a position of the first opening.
    Type: Application
    Filed: February 17, 2014
    Publication date: June 12, 2014
    Applicant: DARFON ELECTRONICS CORP.
    Inventors: Hsin-Cheng Ho, Liang-Yu Yao
  • Publication number: 20140133182
    Abstract: A light guide plate structure includes a light guide plate, a first medium layer, a micro structure, a second medium layer, and a reflection layer. The light guide plate has a light exit surface and a bottom surface opposite to the light exit surface. The first medium layer is formed on the light exit surface. The micro structure is formed on the bottom surface for redirecting light inside the light guide plate to emit from the light exit surface. The second medium layer is formed on the micro structure. The refractive index of the first medium layer and the refractive index of the second medium layer are less than the refractive index of the light guide plate but greater than the refractive index of air. The reflection layer is formed on the second medium layer for reflecting light inside the light guide plate to emit from the light exit surface.
    Type: Application
    Filed: October 29, 2013
    Publication date: May 15, 2014
    Applicants: DARFON ELECTRONICS CORP., DARFON ELECTRONICS (SUZHOU) CO., LTD.
    Inventors: Liang-Yu Yao, Hsin-Cheng Ho, Yen-Chang Chen
  • Publication number: 20140126176
    Abstract: A protective cover includes a light guide plate, a first flexible layer, a light masking layer and a light source. The light guide plate has a light scattering structure, an upper surface and a lower surface opposite to the upper surface, wherein the light scattering structure is formed in the light guide plate and adjacent to the lower surface. The first flexible layer is formed on the upper surface. The light masking layer is formed on the first flexible layer and has a light transmissible portion formed over the light scattering structure correspondingly. The light source is disposed neighboring to the light guide plate and light emitted by the light source is guided by the light guide plate and then emitted out of the light transmissible portion.
    Type: Application
    Filed: October 29, 2013
    Publication date: May 8, 2014
    Applicants: DARFON ELECTRONICS CORP., DARFON ELECTRONICS (SUZHOU) CO., LTD.
    Inventors: Liang-Yu Yao, Hsin-Cheng Ho, Hsuan-Wei Ho
  • Patent number: 8714850
    Abstract: A backlight module is used in a lighting keyboard. The backlight module includes a light guiding plate and a masking. The masking is disposed on the light guiding plate. The masking includes a support layer, a cover layer and a reflective layer. The support layer includes a first surface and a second surface opposite to the first surface. The cover layer is disposed on the first surface. The cover layer includes a first opening. The reflective layer is disposed on the second surface and faces the light guiding plate for reflecting light emitted from the light guiding plate, so as to enhance lighting efficiency on the first opening. The reflective layer includes a second opening. A shape and a position of the second opening are respectively corresponding to a shape and a position of the first opening.
    Type: Grant
    Filed: December 23, 2010
    Date of Patent: May 6, 2014
    Assignee: Darfon Electronics Corp.
    Inventors: Hsin-Cheng Ho, Liang-Yu Yao
  • Publication number: 20140118989
    Abstract: A backlight module includes a light guide plate, a light source, a light shielding sheet, a light reflecting sheet and a light shielding member. The light guide plate has a hole formed thereon and the hole has a side wall. The light source is disposed neighboring to the light guide plate and used for emitting light into the light guide plate. The light shielding sheet is disposed on the light guide plate. The light reflecting sheet is disposed below the light guide plate. The light shielding member is disposed in the hole and covers the side wall of the hole, so as to block the light guided by the light guide plate from being emitted out of the hole.
    Type: Application
    Filed: September 18, 2013
    Publication date: May 1, 2014
    Applicants: DARFON ELECTRONICS CORP., DARFON ELECTRONICS (SUZHOU) CO., LTD.
    Inventors: Yen-Chang Chen, Liang-Yu Yao, Hsin-Cheng Ho
  • Patent number: 8517549
    Abstract: A light keyboard includes a base, a plurality of keyswitches and a backlight module. The keyswitches are disposed on the base. The backlight module includes a light shielding plate, a light guiding plate and a reflecting plate. The light shielding plate is disposed under the base. The light guiding plate is disposed under the light shielding plate. The reflecting plate is disposed under the light guiding plate. The light shielding plate, the light guiding plate and the reflecting plate are stacked with each other so as to form a middle area of the backlight module. An edge of one of the light shielding plate and the reflecting plate is folded and stacked with the other one of the light shielding plate and the reflecting plate so as to form an edge area of the backlight module. The middle area and the edge area are at equal height.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: August 27, 2013
    Assignee: Darfon Electronics Corp.
    Inventors: Liang-Yu Yao, Hsuan-Wei Ho
  • Publication number: 20120170306
    Abstract: A light keyboard includes a base, a plurality of keyswitches and a backlight module. The keyswitches are disposed on the base. The backlight module includes a light shielding plate, a light guiding plate and a reflecting plate. The light shielding plate is disposed under the base. The light guiding plate is disposed under the light shielding plate. The reflecting plate is disposed under the light guiding plate. The light shielding plate, the light guiding plate and the reflecting plate are stacked with each other so as to form a middle area of the backlight module. An edge of one of the light shielding plate and the reflecting plate is folded and stacked with the other one of the light shielding plate and the reflecting plate so as to form an edge area of the backlight module. The middle area and the edge area are at equal height.
    Type: Application
    Filed: January 4, 2012
    Publication date: July 5, 2012
    Inventors: Liang-Yu Yao, Hsuan-Wei Ho
  • Publication number: 20110249423
    Abstract: A lighting keyboard includes a light emitting module, a keyboard module and a masking film. The keyboard module is disposed on the light emitting module. The masking film is disposed between the light emitting module and the keyboard module. The masking film includes a first optical layer and a second optical layer. The first optical layer has several first openings. The second optical layer is disposed on a surface of the first optical layer. The surface of the first optical layer faces the light emitting module. A portion of the second optical layer is exposed from the first openings. A light shielding rate of the first optical layer is larger than a light shielding rate of the second optical layer.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 13, 2011
    Applicant: DARFON ELECTRONICS CORP.
    Inventors: Hsuan-Wei Ho, Liang-Yu Yao
  • Publication number: 20110158728
    Abstract: A backlight module is used in a lighting keyboard. The backlight module includes a light guiding plate and a masking. The masking is disposed on the light guiding plate. The masking includes a support layer, a cover layer and a reflective layer. The support layer includes a first surface and a second surface opposite to the first surface. The cover layer is disposed on the first surface. The cover layer includes a first opening. The reflective layer is disposed on the second surface and faces the light guiding plate for reflecting light emitted from the light guiding plate, so as to enhance lighting efficiency on the first opening. The reflective layer includes a second opening. A shape and a position of the second opening are respectively corresponding to a shape and a position of the first opening.
    Type: Application
    Filed: December 23, 2010
    Publication date: June 30, 2011
    Inventors: Hsin-Cheng Ho, Liang-Yu Yao
  • Publication number: 20080212208
    Abstract: The invention discloses a lens set adapted to a webcam. The webcam has a first focal length. The lens set according to the invention includes a first lens and a second lens. The first lens is used to refract a light to generate a refracted light substantially parallel to an optical axis of the first lens. The second lens is used to focus the refracted light and project it to the webcam. The combination of the lens set and the webcam has a second focal length smaller than the first focal length.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 4, 2008
    Applicant: DARFON ELECTRONICS CORP.
    Inventors: Liang Yu YAO, Chun Chung HUANG, Tsai Jung HU, Jung Ying YAO
  • Publication number: 20070291002
    Abstract: A method for controlling a laser mouse on a surface is provided. The laser mouse includes a laser mouse control unit, a light transmitter and a light receiver. The laser mouse control unit radiates a beam of laser light and detects a moving position of the laser mouse relative to the surface according to a part of the laser light reflected from the surface. The light transmitter generates a beam of light, and the light receiver receives a part of the light reflected from the surface and accordingly generates a signal. The method includes setting a threshold value according to the signal; and determining whether the intensity of the signal is smaller than the threshold value, and if yes, controlling the laser mouse control unit to stop radiating the laser light.
    Type: Application
    Filed: May 31, 2007
    Publication date: December 20, 2007
    Applicant: DARFON ELECTRONICS CORP.
    Inventors: Liang-Yu Yao, Wei-Chan Sung
  • Publication number: 20070284514
    Abstract: An input device comprises a circuit board, an optical sensor, an optical lens and a light generator. The circuit board has a through hole. The optical lens is disposed between the circuit board and the optical sensor. The light generator emits a light beam which passes through the through hole and projects onto a plane, which is then reflected to the optical lens. The optical sensor captures the light beam passed through the optical lens.
    Type: Application
    Filed: June 4, 2007
    Publication date: December 13, 2007
    Applicant: DARFON ELECTRONICS CORP.
    Inventors: Wei-Chan Sung, Liang-Yu Yao
  • Publication number: 20070211472
    Abstract: A light guide module and an optical mouse using the same are provided. The optical mouse includes a light emitting apparatus and a light guide module. The light guide module includes a light guide body and a reflection member and is used for receiving a light beam generated by the light emitting apparatus. The light guide body includes a beam splitter for splitting the light beam into a first light beam and a second light beam. The reflection member is substantially parallel to the beam splitter. After reflected by the reflection member, the second light beam is substantially parallel to the first light beam.
    Type: Application
    Filed: March 1, 2007
    Publication date: September 13, 2007
    Applicant: Darfon Electronics Corp.
    Inventor: Liang-Yu Yao
  • Publication number: 20060242832
    Abstract: A method for manufacturing a micro nozzle is disclosed. The method includes the following steps: providing a substrate having a channel for fluids, wherein the thickness of the substrate is D1 and the depth of the bottom of the channel is D3; forming a protrusion having an acute angle ? on the edge of the substrate through the cutting operation; and further forming a nozzle with a thickness D2 of on the tip of the protrusion. The outlet of the channel is located on the tip of the protrusion. Moreover, the thickness of the nozzle on the tip of the protrusion is less than the depth of the channel or than the thickness of the substrate. The micro nozzle made by the method illustrated above can provide a reliable and stable interface for electro-spraying.
    Type: Application
    Filed: November 16, 2005
    Publication date: November 2, 2006
    Applicant: Industrial Technology Research Institute
    Inventors: Kuo-Yao Weng, Chien-Hung Kuo, Chien-Chih Huang, Mei-Ya Wang, Liang-Yu Yao