Patents by Inventor Kun Zhao
Kun Zhao 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: 20140346954Abstract: The present invention discloses a white LED light emitting device driven directly by constant current in manner of being supplied with alternating current. N parallel branches, consisting of LED modules and constant current units which are in series connection with the LED modules, are connected to an output terminal of a rectification circuit, and by setting the current value, the turning-off voltage, and the turning-on voltage of the constant current unit of each branch, the periodic flickers generated due to changes in the voltage of the alternating current can be avoided. Because the current of each branch is constant, the changes in junction temperatures do not result in the current changing in LED, and the reliability is improved. Along with the increase of the number of the branches, the driving current waveform approximates a sine wave, and the power factor and the efficiency of the light emitting device are improved.Type: ApplicationFiled: December 25, 2012Publication date: November 27, 2014Inventors: Dongming Li, Mian Yang, Zhengyong Feng, Wentao Long, Kun Zhao, Ming Zhang
-
Publication number: 20140333199Abstract: The present invention provides a light-emitting diode (LED) device and a method for manufacturing the same. The LED device comprises: a substrate (1); a chip (2) disposed on the substrate (1); and a first lens (3) disposed on the substrate (1) and spaced from the chip (2); wherein the first lens (3) comprises luminescent powder (7) and at least one of light-diffusing particles (8) and light-reflecting particles (10). The LED device provided by the present invention has a high luminous efficiency, and solves the problem in the prior art that the LED device has a small angle of emergence and the emergent light emergence lacks of uniformity.Type: ApplicationFiled: November 23, 2012Publication date: November 13, 2014Inventors: Sen Wang, Kun Zhao, Ming Zhang
-
Patent number: 8883525Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: GrantFiled: December 16, 2013Date of Patent: November 11, 2014Assignee: Sichuan Sunfor Light Co., Ltd.Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Patent number: 8877527Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: GrantFiled: December 16, 2013Date of Patent: November 4, 2014Assignee: Sichuan Sunfor Light Co., Ltd.Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Patent number: 8878199Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %: 30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: GrantFiled: December 16, 2013Date of Patent: November 4, 2014Assignee: Sichuan Sunfor Light Co., Ltd.Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Publication number: 20140297167Abstract: A method and apparatus for vehicle position indexing. The method includes: obtaining position information of a vehicle in real time, and monitoring a current road segment where the vehicle is located based on the position information and road segment information divided by road network information; in response to having monitored that the vehicle enters into the current road segment, building a road segment index record that includes identification information of the vehicle, identification information of the current road segment, and a time when the vehicle enters into the current road segment; and in response to having monitored that the vehicle leaves the current road segment, adding the time when the vehicle leaves the current road segment, into the road segment index record.Type: ApplicationFiled: March 25, 2014Publication date: October 2, 2014Applicant: International Business Machines CorporationInventors: Ning Duan, Peng Ji, Yi Qi, Ju Yuan, Qian Kun Zhao, Jun Zhu
-
Patent number: 8804560Abstract: A method of operating an electronic device includes providing a plurality of antenna elements, evaluating a wireless communication performance criterion to obtain a performance evaluation, and assigning a first one of the plurality of antenna elements to a main wireless signal reception and transmission path and a second one of the plurality of antenna elements to a diversity wireless signal reception path based on the performance evaluation.Type: GrantFiled: May 24, 2012Date of Patent: August 12, 2014Assignees: Sony Corporation, Sony Mobile Communications ABInventors: Kun Zhao, Shuai Zhang, Zhinong Ying, Erik Lennart Bengtsson, Rickard Ljung, Sailing He
-
Publication number: 20140134764Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: ApplicationFiled: December 16, 2013Publication date: May 15, 2014Applicant: Sichuan Sunfor Lighting Co., Ltd.Inventors: Ming ZHANG, Kun Zhao, Dong-ming Li
-
Publication number: 20140132177Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: ApplicationFiled: December 16, 2013Publication date: May 15, 2014Applicant: SICHUAN SUNFOR LIGHTING CO., LTD.Inventors: MING ZHANG, KUN ZHAO, DONG-MING LI
-
Publication number: 20140131746Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %: 30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: ApplicationFiled: December 16, 2013Publication date: May 15, 2014Applicant: SICHUAN SUNFOR LIGHTING CO., LTD.Inventors: MING ZHANG, KUN ZHAO, DONG-MING LI
-
Patent number: 8710519Abstract: An alternating current (AC) white LED lighting device and a method for manufacturing the same are provided. The AC white LED lighting device consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. Because of using afterglow luminescence materials, the light will be sustained when an excitation light source disappears, which can eliminate the influence of LED chips light output variation due to the AC fluctuation on the lighting device. And the problem of the heating of the chips also can be overcome. At the same time, the influence of temperature quenching effect and direction change of the AC current on the AC white LED lighting device is eliminated.Type: GrantFiled: July 9, 2010Date of Patent: April 29, 2014Assignee: Sichuan Sunfor Light Co., Ltd.Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Publication number: 20140063252Abstract: In a method for calibrating an image capture device that is mounted on a motor vehicle and able to successively capture images of a road area located in front of the vehicle, at least two image objects which correspond to line segments which are straight and substantially parallel to each other in world coordinates are detected in a captured image. With the aid of the image objects, the position of a vanishing point in the captured image is estimated and tracked by a tracking method. In the process, an error is calculated for the position of the vanishing point. As soon as the calculated error decreases to less than a predetermined threshold value, the image capture device is calibrated with reference to the position of the vanishing point associated with the error.Type: ApplicationFiled: August 27, 2013Publication date: March 6, 2014Inventors: KUN ZHAO, URI IURGEL, MIRKO MEUTER, DENNIS MUELLER, CHRISTIAN NUNN
-
Patent number: 8637874Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: GrantFiled: July 14, 2010Date of Patent: January 28, 2014Assignee: Sichuan Sunfor Light Co., Ltd.Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Publication number: 20130315076Abstract: A method of operating an electronic device includes providing a plurality of antenna elements, evaluating a wireless communication performance criterion to obtain a performance evaluation, and assigning a first one of the plurality of antenna elements to a main wireless signal reception and transmission path and a second one of the plurality of antenna elements to a diversity wireless signal reception path based on the performance evaluation.Type: ApplicationFiled: May 24, 2012Publication date: November 28, 2013Inventors: Kun Zhao, Shuai Zhang, Zhinong Ying, Erik Lennart Bengtsson, Rickard Ljung, Sailing He
-
Publication number: 20130221870Abstract: An Alternate Current (AC) white Light-Emitting Diode (LED) device is provided, which belongs to the technical field of white LED manufacturing. The problem to be solved by the present invention is to low-costly overcome a series of deficiencies such as the stroboflash of an AC driven LED, and the heat dissipation difficulty caused by an integrated packaging of multiple LEDs. A white LED unit includes an LED chip and a light emitting material that can emit light when being excited by the LED chip. The luminous lifetime of the light emitting material is 1-100 ms. The LED chip only comprises one PN junction. The light emitted by the LED chip is mixed with the light emitted by the light emitting material to form white light. The white LED unit is driven by AC with a frequency not more than 100 Hz. The white LED device of prevent invention uses the single PN junction chip, rather than the prior integrated packaged AC multi-LED chip.Type: ApplicationFiled: March 1, 2011Publication date: August 29, 2013Applicants: CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY CHINESE ACADEMY OF SCIENCES, SICHUAN SUNFOR LIGHT CO., LTD.Inventors: Hongjie Zhang, Ming Zhang, Chengyu Li, Kun Zhao, Dongming Li, Li Zhang
-
Publication number: 20130119410Abstract: A white LED lighting device driven by a pulse current is provided, which consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. The white LED lighting device drives the LED chips with a pulse current having a frequency of not less than 50 Hz. Because of using the afterglow luminescence materials, the light can be sustained when an excitation light source disappears, thereby eliminating the influence of LED light output fluctuation caused by current variation on the illumination. At the same time, the pulse current can keep the LED chips being at an intermittent work state, so as to overcome the problem of chip heating.Type: ApplicationFiled: July 14, 2010Publication date: May 16, 2013Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Publication number: 20130076579Abstract: An antenna system may include a backplate that includes an end portion. The antenna system may also include first and second antennas spaced apart from each other along the end portion of the backplate. The antenna system may additionally include a parasitic element between the first and second antennas along the end portion of the backplate.Type: ApplicationFiled: September 28, 2011Publication date: March 28, 2013Inventors: Shuai Zhang, Sailing He, Kun Zhao, Zhinong Ying
-
Publication number: 20130015474Abstract: An alternating current (AC) white LED lighting device and a method for manufacturing the same are provided. The AC white LED lighting device consists of blue, violet or ultraviolet LED chips, blue afterglow luminescence materials A and yellow luminescence materials B. Wherein the weight ratio of the blue afterglow luminescence materials A to the yellow luminescence materials B is 10-70 wt %:30-90 wt %. Because of using afterglow luminescence materials, the light will be sustained when an excitation light source disappears, which can eliminate the influence of LED chips light output variation due to the AC fluctuation on the lighting device. And the problem of the heating of the chips also can be overcome. At the same time, the influence of temperature quenching effect and direction change of the AC current on the AC white LED lighting device is eliminated.Type: ApplicationFiled: July 9, 2010Publication date: January 17, 2013Inventors: Ming Zhang, Kun Zhao, Dong-ming Li
-
Patent number: 8329062Abstract: The present invention relates to a waterproof multiple rare-earth co-activated long-afterglow luminescent material having its general chemical composition depicted by a formula aMO.bAl2O3.cSiO2.dGa2O3:xEu.yB.zN, wherein a, b, c, d, x, y, and z are coefficients with the ranges of 0.5?a?2, 0.5?b?3, 0.001?c?1, 0.0001?d?1, 0.0001?x?1, 0.0001?y?1, 0.0001?z?1, M is Ca or Sr, N is Dy or Nd, wherein Sr (or Ca), Al, Si, Ga are main substrate matrix elements and Eu, B, Dy (or Nd) elements are activators. The waterproof multiple rare-earth co-activated long-afterglow luminescent material according to the present invention not only has advantage of a longer afterglow time, but also has water resistance greatly superior to rare-earth activated aluminate long-afterglow luminescent material in the prior art, and still keeps higher long-afterglow property after dipping into water for 60 hours, especially shows its superiority when working or used under the environment of dipping into water or dampness.Type: GrantFiled: November 15, 2007Date of Patent: December 11, 2012Assignee: Sichuan Sunfor Light Co., Ltd.Inventors: Ming Zhang, Kun Zhao
-
Patent number: 8247776Abstract: Disclosed is a device for detecting orientation of a radioactive material to determine presence and position of the radioactive material, comprising: at least one first radiation detector; at least one second radiation detector, each of said at least one second radiation detector and each of said at least one first radiation detector being arranged side by side and in pairs, detection surfaces of said first and second radiation detector being in the same plane to receive radiation from the same direction in the same manner and to generate a first detection signal and a second detection signal, respectively; a shielding plate, said shielding plate being arranged between said first radiation detector and said second radiation detector arranged in a pair and extending forward beyond said detection surfaces; and a determination device for receiving the first and second detection signals from said first and second radiation detector, and determining whether a radioactive material exists or not according to said fiType: GrantFiled: December 22, 2008Date of Patent: August 21, 2012Assignee: Nuctech Company LimitedInventors: Hua Peng, Kun Zhao, Yu He, Ming Ruan