Browsing by Author "Lin, Hui-Hsiung"

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Color separation system with angularly positioned light source module for pixelized backlighting
(2010-01-18)
Chen, Po-Chou
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Lin, Hui-Hsiung
;
Chen, Cheng-Huan
;
Lee, Chi-Hung
;
Lu, Mao-Hong
A color-separation system that angularly positions color LEDs to produce color separation and a lens array to focus this light onto the pixels is proposed. The LED rays from different incident angles are mapped into corresponding sub-pixel positions to efficiently display color image, which can be used to replace the absorbing color filter in the conventional liquid crystal layer. In this paper, the prototype backlight has been designed, fabricated and characterized. The measurement results of this module showed that a gain factor of transmission efficiency three times more than that of conventional color filters efficiency improvement and a larger color gamut are expected. (C)2010 Optical Society of America
Design of a symmetric blazed grating sheet embedded in an autostereoscopic display
(2011-09-01)
Chen, Chien-Yue
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Deng, Qing-Long
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Lin, Hui-Hsiung
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光電系統研究所
;
Institute of Photonic System
This study proposes a diffractive autostereoscopic display technology that utilizes blazed grating embedded in the liquid crystal panel to deliver a stereo image pair to both eyes. Having the diffractive red green blue beams as the color source of the panel, color filters are no longer required in this system. From the simulation analyses, not only could the brightness achieve 77.90%, but no serious chromatic aberration or cross talk appeared. (C) 2011 Optical Society of America
Design of hybrid grating for color filter application in liquid crystal display
(2007-08-01)
Lin, Hui-Hsiung
;
Lu, Mao-Hong
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光電工程學系
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Department of Photonics
Conventional color liquid crystal displays obtain red, green, and blue (RGB) lights by three color filters which absorb other spectra and allow a specific color to transmit. Consequently, the efficiency of conventional color filter in the liquid crystal display is no more than 1/3. The hybrid grating substituted for the color filter use a cold cathode fluorescent lamp or RGB light-emitting diode backlight module in the liquid crystal display to improve the efficiency is proposed. It consists of a set of dual-grating and dual-lenticular lens array. The simulation results of hybrid grating exhibit a gain factor of 1.78 in efficiency, compared with conventional color filters.
Dual-wavelength membrane-based diffractive optical element with extended depth-of-focus for optical pickup head
(2007-08-01)
Lin, Hui-Hsiung
;
Lu, Mao-Hong
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光電工程學系
;
Department of Photonics
An improved structure and optimization method for a high-numerical-aperture application for optical pickup heads that uses a low-stress silicon-nitride-membrane-based diffractive optical element to generate dual-wavelength pseudo-Bessel beams is described in this paper. The dual-wavelength membrane-type diffractive optical element with an extended focal depth for next-generation optical pickup applications has been demonstrated. The theoretical simulation and fabrication results detailing the resolution, longer depth-of-focus and diffractive efficiency are presented for the newly designed membrane diffractive optical element (DOE). This implies that the problems of disc vibration as well as the assembly and optical alignment of the many elements are solved.
Dye-less color filter fabricated by roll-to-roll imprinting for liquid crystal display applications
(2009-07-20)
Lin, Hui-Hsiung
;
Lee, Chi-Hung
;
Lu, Mao-Hong
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光電工程學系
;
Department of Photonics
A diffractive grating is promising for color separation to effectively replace conventional absorptive dye color filter in liquid crystal displays. In this paper, we demonstrated a color separation module consisting of an aspheric-lenticular lens array and a blazed grating to substitute for the dye color filter. Each component was designed to match the recent fabrication ability of our roll-to-roll imprinting. The measurement results of a prototype module showed a gain factor of transmission efficiency three times more than that of conventional color filters. (C) 2009 Optical Society of America
Integrated planar waveguide concave gratings for high density WDM systems
(2005)
Lin, Chun-Ting
;
Huang, Yang-Tung
;
Huang, Jung-Y
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Lin, Hui-Hsiung
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光電工程學系
Three-type designs of concave gratings, including Rowland-circle type, Taylor-expansion type, and recursive-definition type are discussed and their diffraction performance are compared. Furthermore, the structure of compensation design for polarization independence in a planar waveguide structure is discussed.
Synthesis of arbitrarily discrete, diffractionless beams using dual-wavelength diffractive objective lens for optical pickup head
(2010-02-01)
Lin, Hui-Hsiung
;
Lu, Mao-Hong
;
光電工程學系
;
Department of Photonics
Sensitivity to disk vibration and large component number, which complicates assembly and optical alignment, are the drawbacks of traditional optical pickup systems. Here, a numerical method of designing a dual-wavelength diffractive objective lens with high numerical aperture for generating arbitrarily discrete, diffractionless beams with extended depth of focus is presented. Simulation and experimental results show that the optimized design provides better resolution, longer depth of focus and higher diffractive efficiency. The proposed design is promising for next-generation optical pickup systems that are more robust to disk vibration and easier to assemble. (C) 2010 Optical Society of America