Patents by Inventor Chyan-Chyi Wu
Chyan-Chyi Wu 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: 10120196Abstract: An optical device for measuring a distance includes a prism, a beam splitter, a detector and a light source. The prism has a first light-incident surface and a plurality of first light-transmitting surfaces. The first light-incident surface is opposite to the first light-transmitting surfaces. The first light-transmitting surfaces intersect at a vertex. The beam splitter has a light-passing surface, a second light-incident surface and a second light-transmitting surface. The second light-incident surface faces the first light-transmitting surfaces. The light-passing surface is opposite to the second light-incident surface. The beam splitter includes a partially mirror surface facing the light-passing surface and the second light-incident surface. The light-passing surface faces a grating. The detector corresponds to the second light-transmitting surface. The light source emits a light beam to the first light-incident surface. An optical axis of the light beam passes through the vertex and the beam splitter.Type: GrantFiled: September 30, 2016Date of Patent: November 6, 2018Assignee: National Taiwan University of Science and TechnologyInventors: Jeng-Ywan Jeng, Mohammad Hossein Goudarzi Khouygani, Chyan-Chyi Wu
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Publication number: 20180095287Abstract: An optical device for measuring a distance includes a prism, a beam splitter, a detector and a light source. The prism has a first light-incident surface and a plurality of first light-transmitting surfaces. The first light-incident surface is opposite to the first light-transmitting surfaces. The first light-transmitting surfaces intersect at a vertex. The beam splitter has a light-passing surface, a second light-incident surface and a second light-transmitting surface. The second light-incident surface faces the first light-transmitting surfaces. The light-passing surface is opposite to the second light-incident surface. The beam splitter includes a partially mirror surface facing the light-passing surface and the second light-incident surface. The light-passing surface faces a grating. The detector corresponds to the second light-transmitting surface. The light source emits a light beam to the first light-incident surface. An optical axis of the light beam passes through the vertex and the beam splitter.Type: ApplicationFiled: September 30, 2016Publication date: April 5, 2018Inventors: Jeng-Ywan JENG, Mohammad Hossein GOUDARZI KHOUYGANI, Chyan-Chyi WU
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Publication number: 20100095798Abstract: A planar moving apparatus includes a moving stage, a first driving apparatus, a second driving apparatus and a base member. The base member carries the stage, the first driving apparatus and the second driving apparatus. The first driving apparatus drives the moving stage along a first axial direction and the second driving apparatus drives the moving stage along a second axial direction. The first driving apparatus and the second driving apparatus operate independently and do not interfere with each other when the moving stage moves along either the first axial direction or the second axial direction.Type: ApplicationFiled: April 2, 2009Publication date: April 22, 2010Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: LIANG CHIH CHANG, CHAO JUNG CHEN, CHYAN CHYI WU, SHENG HANG WANG, TA CHANG YU, CHUNG LUN WU
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Patent number: 6919561Abstract: A diffraction laser encoder apparatus for positional and movement information measurement of a target made with a diffraction grating. The diffraction laser encoder has a laser light source for generating a source beam. A polarization beam splitter assembly comprises a polarization beam splitter for receiving the source beam for splitting a P-polarization component and an S-polarization component of the source beam into parallel and offset beams. A focusing lens focuses the P-polarization component and the S-polarization component beams onto the target diffraction grating and returning diffracted P-polarization and diffracted S-polarization beams back into the polarization beam splitter for generating a detector beam coaxially containing the diffracted P-polarization and the diffracted S-polarization beams. A detector assembly receives the detector beam for electrical processing and analysis for resolving the positional and movement information.Type: GrantFiled: February 9, 2004Date of Patent: July 19, 2005Inventors: Chih-Kung Lee, Liang-Bin Yu, Chyan-Chyi Wu, Shu-Sheng Lee, Wen-Jong Wu, Ming-Hua Wen, Shih-Jui Chen, Giin-Yuan Wu
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Publication number: 20040155179Abstract: A diffraction laser encoder apparatus for positional and movement information measurement of a target made with a diffraction grating. The diffraction laser encoder has a laser light source for generating a source beam. A polarization beam splitter assembly comprises a polarization beam splitter for receiving the source beam for splitting a P-polarization component and an S-polarization component of the source beam into parallel and offset beams. A focusing lens focuses the P-polarization component and the S-polarization component beams onto the target diffraction grating and returning diffracted P-polarization and diffracted S-polarization beams back into the polarization beam splitter for generating a detector beam coaxially containing the diffracted P-polarization and the diffracted S-polarization beams. A detector assembly receives the detector beam for electrical processing and analysis for resolving the positional and movement information.Type: ApplicationFiled: February 9, 2004Publication date: August 12, 2004Inventors: Chih-Kung Lee, Liang-Bin Yu, Chyan-Chyi Wu, Shu-Sheng Lee, Wen-Jong Wu, Ming-Hua Wen, Shih-Jui Chen, Giin-Yuan Wu
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Patent number: 6631031Abstract: A polarization splitting backlight module for efficiently emitting polarized light beams is disclosed. The polarization splitting backlight module of the present invention comprises a light source, an under plate, a substrate, a phase retardation reflective film, a scattering structure, a thin film and an upper cover. The light beams emitted from the non-polarized light source are introduced into the substrate, and after scattering, reflection, phase retardation and polarization splitting, the light beams will pass through the upper cover being of a single polarization state so as to be utilized by electro-optical systems, such as liquid crystal displays. The present invention converts light beams into a single polarization state, and thereby the efficiency of polarization splitting, as well as the brightness, are higher than that of a conventional backlight module.Type: GrantFiled: November 30, 2000Date of Patent: October 7, 2003Inventors: Chih-Kung Lee, Chyan-Chyi Wu, Ching-Heng Tang
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Publication number: 20030098411Abstract: The invention is using the phase information contained in the diffraction light of the grating, to analyze the velocity and the displacement of the object having the grating attached. By using the relative placement of the optical elements, the entire optical scale system has high tolerance to the phase difference that is caused by the grating optical scale and the relative calibration error of the grating optical scale and the laser light head. Due to the light beam is focused on the diffraction grating, the wave-front of the signal light is relatively not impacted by the geometrical characteristics of the diffraction grating, the geometrical characteristics of the diffraction grating includes something like the interval is not even or the surface is bending. The excellent signal visibility can be obtained by applying the linear grating, radial grating, or the cylindrical grating as the grating in the design according to the present invention.Type: ApplicationFiled: November 27, 2001Publication date: May 29, 2003Inventors: Chih-Kung Lee, Liang-Bin Yu, Chyan-Chyi Wu, Shu-Sheng Lee, Wen-Jong Wu, Ming-Hua Wen, Zheng-Sheng Pan, Shih-Jui Chen, Yen-Fu Lai, Giin-Yuan Wu
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Patent number: 6373630Abstract: A light beam polarization converter for converting non-polarized light beams of an illumination source into a single polarization state, which may be utilized in various electro-optical devices, such as liquid crystal projection type televisions. A polarization splitter film and a phase retardation film are utilized to make the incident light beams of a light source focused and refracted with an under plate. The light beam, upon passing through the under plate, goes through a series of optical processes of polarization splitting, reflection, total reflection and phase retardation, and subsequently becomes a light beam of a single polarization state output.Type: GrantFiled: May 5, 2000Date of Patent: April 16, 2002Inventors: Chih-Kung Lee, Chyan-Chyi Wu, Ching-Heng Tang
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Publication number: 20010033417Abstract: A polarization splitting backlight module for efficiently emitting polarized light beams is disclosed. The polarization splitting backlight module of the present invention comprises a light source, an under plate, a substrate, a phase retardation reflective film, a scattering structure, a thin film and an upper cover. The light beams emitted from the non-polarized light source are introduced into the substrate, and after scattering, reflection, phase retardation and polarization splitting, the light beams will pass through the upper cover being of a single polarization state so as to be utilized by electro-optical systems, such as liquid crystal displays. The present invention converts light beams into a single polarization state, and thereby the efficiency of polarization splitting, as well as the brightness, are higher than that of a conventional backlight module.Type: ApplicationFiled: November 30, 2000Publication date: October 25, 2001Inventors: Chih-Kung Lee, Chyan-Chyi Wu, Ching-Heng Tang