Patents by Inventor Chun-Lai Hsiao
Chun-Lai Hsiao 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: 9398276Abstract: A control method of a projection device is provided. The control method comprises following steps. The light source generates a light beam towards a micro electro mechanical system (MEMS) module. The scan driver outputs a first direction scan signal and a second direction scan signal to the MEMS module for enabling the MEMS module to reflect the light beam to a projection surface. The first direction control system of the MEMS module is a second-order system and has a resonance frequency, and the first direction scan signal has a frequency within a frequency range containing the resonance frequency.Type: GrantFiled: January 15, 2015Date of Patent: July 19, 2016Assignee: LITE-ON TECHNOLOGY CORPORATIONInventor: Chun-Lai Hsiao
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Patent number: 9348133Abstract: An image projection method and a microelectromechanical system (MEMS) image projection apparatus are provided. The image projection method controls a MEMS scanning mirror swinging around a first swing axis to project an image light beam. The image projection method includes following steps. A resonance frequency and a damping coefficient of the MEMS scanning mirror at swinging are measured to calculate a first amplitude scale and a first maintaining period, and a periodic wave signal is generated accordingly. The periodic wave signal is output to the MEMS scanning mirror for controlling the MEMS scanning mirror to swing, and a swing speed error thereof is recorded. By adjusting the first amplitude scale and the first maintaining period, the periodic wave signal is also adjusted, and the corresponding swing speed error is recorded. According to the recorded swing speed errors, the corrected periodic wave signal is generated for controlling the MEMS scanning mirror.Type: GrantFiled: January 22, 2013Date of Patent: May 24, 2016Assignee: Lite-On Technology CorporationInventors: Chia-Hao Hsu, Chun-Lai Hsiao
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Patent number: 9213184Abstract: The present invention provides a micro projector device including a MEMS mirror, a laser source module, a detection module, and a control unit. The MEMS mirror has a first portion and a second portion, the first portion pivots to the second portion, and the first portion oscillates in relation to the second portion. The laser source module generates a laser light to a reflection plane of the first portion of the MEMS mirror. The detection module detects a capacitance value between the first portion and the second portion. The control unit determines the relative position between the first portion and the second portion according to the capacitance value, and provides image data to the laser source module according to the relative position. The reflection plane of the first portion is configured to reflect the laser light from the laser source module to a projection plane.Type: GrantFiled: January 3, 2014Date of Patent: December 15, 2015Assignee: Lite-On Technology CorporationInventors: Yu-Nan Tsai, Kevin K W Cheng, Chia-Hao Hsu, Chun-Lai Hsiao
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Patent number: 9201165Abstract: A detection circuit is provided. A detection signal corresponding to an equivalent capacitance value of a micro-electro-mechanical system is generated by an oscillator, and the equivalent capacitance value of the micro-electro-mechanical system varies with a location of the micro-electro-mechanical system.Type: GrantFiled: October 3, 2013Date of Patent: December 1, 2015Assignee: Lite-On Technology CorporationInventors: Yu-Nan Tsai, Kai-Wen Cheng, Chia-Hao Hsu, Chun-Lai Hsiao
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Publication number: 20150227031Abstract: A control method of a projection device is provided. The control method comprises following steps. The light source generates a light beam towards a micro electro mechanical system (MEMS) module. The scan driver outputs a first direction scan signal and a second direction scan signal to the MEMS module for enabling the MEMS module to reflect the light beam to a projection surface. The first direction control system of the MEMS module is a second-order system and has a resonance frequency, and the first direction scan signal has a frequency within a frequency range containing the resonance frequency.Type: ApplicationFiled: January 15, 2015Publication date: August 13, 2015Applicant: LITE-ON TECHNOLOGY CORPORATIONInventor: Chun-Lai HSIAO
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Publication number: 20150194133Abstract: A portable electronic device with a projecting function and a projecting method are provided. The portable electronic device includes a posture sensor, a projection lens, and a controller. The posture sensor is used for detecting the orientation information of the portable electronic device. The projection lens is used for projecting a source image as a projection image. The controller is electrically connected with the posture sensor and the projection lens for judging an orientation status of the portable electronic device according to the orientation information. According to the orientation status of the portable electronic device, an approach of producing the projection image is correspondingly adjusted.Type: ApplicationFiled: March 4, 2014Publication date: July 9, 2015Applicant: LITE-ON IT CORPORATIONInventors: Chi-Hung Lin, Chun-Lai Hsiao
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Publication number: 20150109588Abstract: The present invention provides a micro projector device including a MEMS mirror, a laser source module, a detection module, and a control unit. The MEMS mirror has a first portion and a second portion, the first portion pivots to the second portion, and the first portion oscillates in relation to the second portion. The laser source module generates a laser light to a reflection plane of the first portion of the MEMS mirror. The detection module detects a capacitance value between the first portion and the second portion. The control unit determines the relative position between the first portion and the second portion according to the capacitance value, and provides image data to the laser source module according to the relative position. The reflection plane of the first portion is configured to reflect the laser light from the laser source module to a projection plane.Type: ApplicationFiled: January 3, 2014Publication date: April 23, 2015Applicant: LITE-ON IT CorporationInventors: Yu-Nan TSAI, Kevin KW CHENG, Chia-Hao HSU, Chun-Lai HSIAO
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Publication number: 20150042365Abstract: A detection circuit is provided. A detection signal corresponding to an equivalent capacitance value of a micro-electro-mechanical system is generated by an oscillator, and the equivalent capacitance value of the micro-electro-mechanical system varies with a location of the micro-electro-mechanical system.Type: ApplicationFiled: October 3, 2013Publication date: February 12, 2015Applicant: LITE-ON IT CORPORATIONInventors: Yu-Nan Tsai, Kai-Wen Cheng, Chia-Hao Hsu, Chun-Lai Hsiao
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Publication number: 20140153073Abstract: An image projection method and a microelectromechanical system (MEMS) image projection apparatus are provided. The image projection method controls a MEMS scanning mirror swinging around a first swing axis to project an image light beam. The image projection method includes following steps. A resonance frequency and a damping coefficient of the MEMS scanning mirror at swinging are measured to calculate a first amplitude scale and a first maintaining period, and a periodic wave signal is generated accordingly. The periodic wave signal is output to the MEMS scanning mirror for controlling the MEMS scanning mirror to swing, and a swing speed error thereof is recorded. By adjusting the first amplitude scale and the first maintaining period, the periodic wave signal is also adjusted, and the corresponding swing speed error is recorded. According to the recorded swing speed errors, the corrected periodic wave signal is generated for controlling the MEMS scanning mirror.Type: ApplicationFiled: January 22, 2013Publication date: June 5, 2014Applicant: LITE-ON IT CORPORATIONInventors: Chia-Hao Hsu, Chun-Lai Hsiao