Patents by Inventor Hua Tang Liu
Hua Tang Liu 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: 8708527Abstract: A light module includes a light source and an optical lens. The light source emits light to the optical lens. The light source is a single unit and has a parallelizing surface, a first plane, a wave surface, and a second plane in sequence. The light source emits light to the optical lens and through the parallelizing surface, the first plane, the wave surface, and the second plane in sequence to form a parallel linear light.Type: GrantFiled: May 17, 2011Date of Patent: April 29, 2014Assignee: Asia Optical Co., Inc.Inventors: Hua-tang Liu, Ching-Shiang Wang
-
Publication number: 20130250275Abstract: A distance measurement method is provided that includes the steps of transmitting a laser signal to a target, receiving outside signals reflected by the target, converting the outside signals into an analog voltage signal, sampling the analogy voltage signal to obtain digital signals, storing the digital signals at storage addresses in a one-to-one relationship, repeating the above steps, accumulating numeral values at each storage addresses to obtain an accumulated value, outputting the accumulating value which exceeds a constant and corresponds to a time point, and calculating the distance between a laser range finding device and the target according to the time point corresponding to the output accumulated value.Type: ApplicationFiled: May 21, 2013Publication date: September 26, 2013Applicants: Asia Optical International Ltd., Sintai Optical (Shenzhen) Co., Ltd.Inventor: Hua-Tang Liu
-
Publication number: 20130148096Abstract: A rangefinder for measuring a distance of an object includes a case, in which a refractor, a measuring light source, a light receiver, a receiving lens, a reference light source, and a reflector are provided. The measuring light source emits measuring light to the refractor, and the refractor refracts the measuring light to the object. The measuring light reflected by the object emits to the light receiver through the receiving lens. The reference light emits reference light to the reflector, and the reflector reflects the reference light to the light receiver. The refractor and the reflector may be turned for calibration.Type: ApplicationFiled: March 13, 2012Publication date: June 13, 2013Applicant: ASIA OPTICAL CO., INC.Inventors: Zhang-Ming Chang, Hua-Tang Liu
-
Publication number: 20130002612Abstract: A photo-sensor type touch device includes a screen, two light modules, a sensor, and a calculating unit. The screen has a displaying region to show images thereon. The light module emits linear invisible light to the displaying region. The invisible light is substantially perpendicular to a normal of the displaying region. The sensor senses a change of the invisible light on the displaying region when an object approaches the displaying region, and sends a signal out. The calculating unit is electrically connected to the sensor to receive the signal and calculate the signal to obtain a location of the object on the displaying region.Type: ApplicationFiled: September 7, 2012Publication date: January 3, 2013Applicant: Asia Optical International Ltd.Inventors: Hua-Tang Liu, Ching-Shiang Wang
-
Publication number: 20120300463Abstract: A miniaturized laser emitting module includes a substrate, a laser diode and a lens element. The substrate includes an installation channel, the laser diode is installed in the installation channel of the substrate, and the lens element is installed in the installation channel of the substrate in a light-emitting direction of the laser diode. The lens element includes a collimating lens portion being adjacent to the laser diode and an undulating lens portion being distant from the laser diode. The collimating lens portion and the undulating lens portion are mutually connected to form as type of one piece.Type: ApplicationFiled: May 24, 2012Publication date: November 29, 2012Applicant: ASIA OPTICAL CO. INC.Inventors: Hua-Tang Liu, Ching-Shiang Wang
-
Publication number: 20120294013Abstract: A light module includes a light source and an optical lens. The light source emits light to the optical lens. The light source is a single unit and has a parallelizing surface, a first plane, a wave surface, and a second plane in sequence. The light source emits light to the optical lens and through the parallelizing surface, the first plane, the wave surface, and the second plane in sequence to form a parallel linear light.Type: ApplicationFiled: May 17, 2011Publication date: November 22, 2012Applicant: ASIA OPTICAL CO., INC.Inventors: Hua-Tang Liu, Ching-Shiang Wang
-
Patent number: 8169598Abstract: A rangefinder. A main body includes a first end and a second end opposite to the first end. The second end includes at least one guide bar. A receiving lens is connected to the first end of the main body. A first adjusting wheel and a second adjusting wheel are rotatably connected to the second end of the main body. A movable board is movably fit on the guide bar of the second end of the main body and is disposed between the first and second adjusting wheels. A receiving member is connected to the movable board, receiving light beams received by the receiving lens. The movable board is moved by rotation of the first and second adjusting wheels, driving the receiving member to move on an optical axis.Type: GrantFiled: December 30, 2010Date of Patent: May 1, 2012Assignee: Asia Optical Co., Inc.Inventors: Sing-Hung Huang, Hua-Tang Liu
-
Publication number: 20110299061Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: ApplicationFiled: August 11, 2011Publication date: December 8, 2011Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
-
Patent number: 8018580Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: GrantFiled: September 20, 2010Date of Patent: September 13, 2011Assignee: Asia Optical Co., Inc.Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
-
Publication number: 20110164241Abstract: A rangefinder. A main body includes a first end and a second end opposite to the first end. The second end includes at least one guide bar. A receiving lens is connected to the first end of the main body. A first adjusting wheel and a second adjusting wheel are rotatably connected to the second end of the main body. A movable board is movably fit on the guide bar of the second end of the main body and is disposed between the first and second adjusting wheels. A receiving member is connected to the movable board, receiving light beams received by the receiving lens. The movable board is moved by rotation of the first and second adjusting wheels, driving the receiving member to move on an optical axis.Type: ApplicationFiled: December 30, 2010Publication date: July 7, 2011Applicant: ASIA OPTICAL CO., INC.Inventors: Sing-Hung Huang, Hua-Tang Liu
-
Publication number: 20110013173Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: ApplicationFiled: September 20, 2010Publication date: January 20, 2011Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
-
Patent number: 7800737Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: GrantFiled: March 13, 2008Date of Patent: September 21, 2010Assignee: Asia Optical Co., Inc.Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
-
Patent number: 7471377Abstract: A laser distance measuring system includes an object lens, a beam splitter, a transmitter, a receiver, and a shutter mechanism. The beam splitter is disposed at one side of the object lens. The transmitter emits a laser beam that is split by the beam splitter into a measurement beam and a reference beam. The measurement beam passes through the object lens, and is reflected by an object to result in a reflected measurement beam passing through the object lens. The receiver is disposed to receive the reflected measurement beam and the reference beam. The shutter mechanism includes a beam masker operable to move to either block path of the reflected measurement beam to the receiver or path of the reference beam to the receiver.Type: GrantFiled: July 30, 2007Date of Patent: December 30, 2008Assignee: Asia Optical Co., Inc.Inventors: Hua-Tang Liu, Hui-Qing Chen, Ling-Ben Yu
-
Publication number: 20080316464Abstract: A distance measurement method for use in a laser range finding device to measure a distance between the laser range finding device and a target is disclosed. The method comprises the following steps. A laser signal is sent to the target in a first time point. A reflected laser signal reflected by the target is then received. A digital signal having a plurality of signal values ranging from 0 to N is obtained by sampling the reflected laser signal with a sampling signal, wherein N is an integer larger than two. A maximum signal value among the signal values is obtained. The distance is calculated according to the first time point and a second time point where the maximum signal value is generated.Type: ApplicationFiled: March 13, 2008Publication date: December 25, 2008Applicant: ASIA OPTICAL CO., INC.Inventors: Yin-Long Luo, Sheng Liang, Peng-Fei Song, Pie-Yau Chien, Hua-Tang Liu
-
Patent number: 7395604Abstract: A laser level with temperature control device (2) and the temperature control method thereof are disclosed. The temperature control device includes a thermal insulation chamber (22), a thermoelectric cooler (25), a control unit (21), and first and second temperature sensors (23, 24). The second temperature sensor is received in the thermal insulation chamber together with a tilt sensor (12). The control unit controls operation of the thermoelectric cooler according to the external and internal temperature signals respectively output by the first and second temperature sensors, so as to adjust the internal temperature inside the thermal insulation chamber to be a calibration temperature point close to the external temperature. Accordingly, the temperature drift problem can be addressed, and the working temperature of the tilt sensor can be maintained in a stable range. Further, the acceptable ambient temperature range within which the tilt sensor works can be expanded.Type: GrantFiled: July 10, 2006Date of Patent: July 8, 2008Assignee: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Hua-Tang Liu, Yi-qi Li, Yong-ce Qi, Zhang-yong Jian, Yue-ye Chen
-
Patent number: 7373724Abstract: A laser level includes a level-adjusting device and a laser transmitter device mounted on the level-adjusting device. The level-adjusting device includes a horizontal flat board movable by a plurality of motor modules to a desired condition, a cross rotatable circle including an outer circle rotatable about a first rotation axis and a concentric inner circle rotatable about a second rotation axis perpendicular to the first rotation axis, and a connecting post connecting the horizontal flat board to the cross rotatable circle and supporting the laser transmitter thereon.Type: GrantFiled: February 14, 2006Date of Patent: May 20, 2008Assignee: Asia Optical Co., Inc.Inventors: Yong-ce Qi, Hua-tang Liu
-
Publication number: 20080036993Abstract: A laser distance measuring system includes an object lens, a beam splitter, a transmitter, a receiver, and a shutter mechanism. The beam splitter is disposed at one side of the object lens. The transmitter emits a laser beam that is split by the beam splitter into a measurement beam and a reference beam. The measurement beam passes through the object lens, and is reflected by an object to result in a reflected measurement beam passing through the object lens. The receiver is disposed to receive the reflected measurement beam and the reference beam. The shutter mechanism includes a beam masker operable to move to either block path of the reflected measurement beam to the receiver or path of the reference beam to the receiver.Type: ApplicationFiled: July 30, 2007Publication date: February 14, 2008Inventors: Hua-Tang Liu, Hui-Qing Chen, Ling-Ben Yu
-
Patent number: 7304727Abstract: A laser distance-measuring device includes a laser-transmitting portion, a laser-receiving portion, a coupling portion, an inclination-measuring portion, a signal-processing portion, and a display. The laser-transmitting portion emits a laser beam, and the laser-receiving portion receives the laser beam. The coupling portion interconnects the laser-receiving portion and the signal-processing portion. The inclination-measuring portion detects an inclination angle of the laser beam. The signal-processing portion processes the signals received from the laser-receiving portion and the inclination-measuring portion and sends the result to the display. The display receives and displays the result of processing by the signal-processing portion.Type: GrantFiled: November 29, 2005Date of Patent: December 4, 2007Assignee: Asia Optical Co., Inc.Inventors: Pie-Yau Chien, Hua-Tang Liu, Hui-Qing Chen, Shou-Qing Yang, Hai-Hua Chen, Liang Li, Han Lu, Peng-Fei Song
-
Patent number: D579805Type: GrantFiled: February 4, 2008Date of Patent: November 4, 2008Assignee: Asia Optical Co., Inc.Inventors: Chao-Hung Chen, Han Lu, Hua-Tang Liu
-
Patent number: D611848Type: GrantFiled: July 16, 2009Date of Patent: March 16, 2010Assignee: Asia Optical Co., Inc.Inventors: Hua-Tang Liu, Han Lu, Sheng Luo