Patents by Inventor Po-Han Chen

Po-Han Chen 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).

  • Publication number: 20130064263
    Abstract: The present invention discloses a manufacturing method of vertical cavity surface emitting laser. The method includes following steps: providing a substrate; forming an epitaxial layer stack including an aluminum-rich layer; forming an ion-doping mask including a ring-shaped opening; doping ions in the epitaxial layer stack through the ring-shaped opening and forming a ring-shaped ion-doped region over the aluminum-rich layer; forming an etching mask on the ion-doping mask for covering the ring-shaped opening of the ion-doping mask; etching the epitaxial layer stack through the etching mask and ion-doping mask for forming an island platform; oxidizing the aluminum-rich layer for forming a ring-shaped oxidized region. In addition, the present invention also discloses a vertical cavity surface emitting laser manufactured by the above mentioned method.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 14, 2013
    Inventors: Po-Han CHEN, Cheng-Ju WU, Jin-Shan PAN
  • Publication number: 20120255652
    Abstract: A method for improving surface mechanical properties of non-austenitic stainless steels comprises steps of: providing a non-austenitic stainless steel material; placing the non-austenitic stainless steel material in an environment containing at least one austenite-stabilizing element, and implanting the austenite-stabilizing elements into a surface of the non-austenitic stainless steel material to form a modified layer enriched with the austenite-stabilizing elements; and placing the non-austenitic stainless steel material in a carbon-bearing atmosphere to make the modified layer in contact with the carbon-bearing atmosphere, and maintaining the non-austenitic stainless steel material at a carburizing temperature below 600° C. to implant carbon into the modified layer to form a carburized layer.
    Type: Application
    Filed: April 7, 2011
    Publication date: October 11, 2012
    Inventors: Kuen-Shyang HWANG, Li-Hui CHENG, Yung-Chung LU, Yang-Liang FAN, Po-Han CHEN
  • Publication number: 20120094707
    Abstract: A wireless communications device with a wireless module and a controller module is provided. The wireless module performs wireless transceiving to and from a service network. The controller module transmits a connection request message to the service network via the wireless module, and receives, on a downlink shared channel, a connection rejection message corresponding to the connection request message from the service network via the wireless module. Also, the controller module determines whether the connection rejection message indicates that congestion has occurred on the downlink shared channel, and retransmits the connection request message and waits to receive, on a forward access channel, a subsequent response message from the service network via the wireless module, in response to the connection rejection message indicating that congestion has occurred on the downlink shared channel.
    Type: Application
    Filed: April 29, 2011
    Publication date: April 19, 2012
    Applicant: ACER INCORPORATED
    Inventor: Po-Han Chen
  • Patent number: 7953418
    Abstract: A method for allocating a spatial radio resource in a communication system includes: determining a threshold according to at least a parameter of the communication system; determining whether at least one wireless communication apparatus in the communication system is a candidate being capable of utilizing the spatial radio resource according to the threshold; scheduling priorities for a plurality of wireless communication apparatuses each being the candidate; and allocating the spatial radio resource according to the priorities of the wireless communication apparatuses each being the candidate.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: May 31, 2011
    Assignee: Mediatek Inc.
    Inventors: Po-Han Chen, Ching-Yao Huang
  • Publication number: 20090146166
    Abstract: A structure applying an optical wave guide layer includes an incident light source and at least one optical wave guide layer. The structure can be in any geometric shape such as a planar, hemispherical or conical shape. The geometric structure is designed for collecting and guiding the incident light source in specific directions. The light can be guided by a combination of materials having different optical properties. The incident angle of the collected light is controlled and the materials are selected to effectively overcome a drawback of the prior art that a portion of the light of some optical components cannot be extracted by a light extraction method.
    Type: Application
    Filed: April 2, 2008
    Publication date: June 11, 2009
    Inventors: Cheng-yi Liu, Yung-Hsun Lin, Ching-Liang Lin, Po-Han Chen, Chia-Lun Chang, Pen-Ko Chou, Yi-Ju Chen, You-Hsian Chang
  • Publication number: 20090135770
    Abstract: A method for allocating a spatial radio resource in a communication system includes: determining a threshold according to at least a parameter of the communication system; determining whether at least one wireless communication apparatus in the communication system is a candidate being capable of utilizing the spatial radio resource according to the threshold; scheduling priorities for a plurality of wireless communication apparatuses each being the candidate; and allocating the spatial radio resource according to the priorities of the wireless communication apparatuses each being the candidate.
    Type: Application
    Filed: October 22, 2008
    Publication date: May 28, 2009
    Inventors: Po-Han Chen, Ching-Yao Huang
  • Publication number: 20080073010
    Abstract: At least one alerting layer of a different color than a tire surface is divided into a rubber layer of the tire, in accordance with a safe abrasion condition of the tire, wherein a default distance of a lowest alerting layer to the tire surface is less than a depth of tire tread. Before the tire tread is worn out, the alerting layer of a default color will be emerged at a part of the tire that is abraded, due to a different extent of abrasion, which facilitates a consumer to check a degree of safety of the tire by oneself by a direct visualization method, and can prevent unworthy practicers to trick the consumer to replace the tire, while it has not achieved a standard of abrasion.
    Type: Application
    Filed: September 25, 2006
    Publication date: March 27, 2008
    Inventor: Po-Han Chen
  • Publication number: 20060292103
    Abstract: A composition for skin use is disclosed. The composition for skin use comprises a high concentration of protein fiber dispersed in an emulsifier system that is consisted of at least one non-silicone surfactant. The emulsifier system has no silicone-containing component, so as to improve the disadvantages of the prior emulsifier system for applying to the material of cosmetics or external medicines. In another embodiment of the present invention, the composition for skin use further comprises the high concentration of protein fibers dispersed in a wax and an emulsifier system that is consisted of at least one non-silicone surfactant.
    Type: Application
    Filed: December 15, 2005
    Publication date: December 28, 2006
    Inventors: Ming-Hung Huang, Po-Han Chen, Ying-Fei Huang, Ya-Ping Hung
  • Publication number: 20060222617
    Abstract: A water-soluble cosmetic composition and the manufacturing method thereof are provided. The water-soluble cosmetic composition is obtained by a process as follows. First, a mixed solution is provided, wherein the mixed solution comprises about 0.1% to 30% by weight of ascorbic acid or derivatives thereof, and 0.1% to 10% water-soluble collagen having molecular weight in the range of about 3 kD to 300 kD. Subsequently a vacuum dehydration process is conducted to remove a portion of water from the mixed solution.
    Type: Application
    Filed: December 1, 2005
    Publication date: October 5, 2006
    Inventors: Po-Han Chen, Ya-Ping Hung, De-Ching Chou, Ying-Fei Huang
  • Publication number: 20060099223
    Abstract: An enzymatic hydrolysate of algae and a method for preparing the same are disclosed. After rehydrating dry algae, an insoluble pellet is digested by using a specific enzymatic reaction condition, so as to produce the soluble and bioactive enzymatic hydrolysate of algae. The enzymatic hydrolysate of algae, which comprises a mixture of polysaccharides and polypeptides, can promote a growth of skin cells cultured in vitro and be formulated in cosmetic, food or skin external agent compositions.
    Type: Application
    Filed: January 24, 2005
    Publication date: May 11, 2006
    Inventors: Po-Han Chen, Ming-Hung Huang
  • Patent number: D617921
    Type: Grant
    Filed: March 14, 2005
    Date of Patent: June 15, 2010
    Inventor: Burt Po-Han Chen