Browsing by Author "Liao, Lin-Yao"

Now showing 1 - 14 of 14

2-D/3-D switchable autostereoscopic display with multi-electrically driven liquid-crystal (MeD-LC) lenses
(2010-09-01)
Huang, Yi-Pai
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Liao, Lin-Yao
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Chen, Chih-Wei
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光電工程學系
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顯示科技研究所
A cylindrical multi-electrically driven liquid-crystal lens (MeD-LC lens) is proposed to extend the range of focusing. The MeD-LC lens could be applied to switching 2-D and 3-D images by supplying a specific operating voltage on each electrode. Therefore, the MeD-LC lens has less cross-talk than that of a conventional LC lens. Furthermore, the simplified structure of a MeD-LC lens with a homogeneous LC layer is much easier for fabrication without a LC-alignment issue.
A multi-objective approach in the optimization of optical systems taking into account tolerancing
(2011-01-01)
de Albuquerque, Braulio F. C.
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Liao, Lin-Yao
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Montes, Amauri Silva
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de Sousa, Fabiano Luis
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Sasian, Jose
A Multi-Objective approach for lens design optimization was verified. The optimization problem was approached by addressing simultaneously, but separately, image quality and system tolerancing. In contrast to other previous published methods, the error functions were not combined into a single merit function. As a result the method returns a set of non-dominated solutions that generates a Pareto Front. Our method resulted in alternate and useful insights about the trade off solutions for a lens design problem. This Multi-objective optimization can conveniently be implemented with evolutionary methods of optimization that have established success in lens design. We provided an example of the insights and usefulness of our approach in the design of a Telephoto lens system using NSGA-II, a popular multiobjective evolutionary optimization algorithm.
A real-time image compensation for high dynamic range LCDs
(2008)
Liao, Lin-Yao
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Huang, Yi-Pai
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Yeh, Szu-Che
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光電工程學系
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Department of Photonics
Blur-mask approach (BMA) was developed to simulate the light distribution of locally-controlled dimming LED backlight with much lower computational complexity which is less than 1% of that of conventional convolution method, Blur-mask approach was successfully demonstrated on a 37 '' HDR LCD-TV with real-time modification to perform high quality image (Less image distortion) and high contrast ratio (similar to 20,000:1 with test image-Lily).
A real-time liquid crystal signal compensation method for high dynamic range LCD
(2007)
Liao, Lin-Yao
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Lin, Fang-Cheng
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Huang, Yi-Pai
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Shieh, Han-Ping D.
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Yeh, Szu-Che
Blur-mask approach was developed to simulate the backlight distribution of locally-controlled dimming LED backlight with lower computational complexity which is less than 1% of conventional convolution method. The If blur-mask approach was demonstrated to perform high image, quality and high contrast ratio (similar to 20,000 : 1) on a 37" LCD-TV. Compared with convolution, blur-mask approach has much lower computational complexity and succesfully demonstrated for real-time application.
Advanced Technologies for High Quality LC Display
(2008)
Huang, Yi-Pai
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Lin, Fang-Cheng
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Liao, Cheng-Yumr
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Hsu, Ya-Ting
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Huang, Wei-Kai
For achieving high quality LC displays, Advanced-MVA mode was proposed to wide the viewing angle, 4-color filed sequential method was utilized to increase the optical efficiency, and the local controlled LED backlight was applied to much improve the contrast and lower the power consumption.
Blur-Mask Approach for Real-Time Calculation of Light Spreading Function (LSF) on Spatial Modulated High Dynamic Range LCDs
(2010-04-01)
Liao, Lin-Yao
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Huang, Yi-Pai
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光電工程學系
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Department of Photonics
Blur-mask approach (BMA) was developed to simulate the light distribution of locally controlled LED backlight, providing much lower computational complexity which is less than 1% of that of conventional convolution approach and being successfully demonstrated on a 37" high dynamic range (HDR) LCD-TV with real-time modification to perform high quality image (Less image distortion) and high contrast ratio (similar to 20,000: 1 with test image-Lily).
Dynamic backlight gamma on high dynamic range LCD TVs
(2008-06-01)
Lin, Fang-Cheng
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Huang, Yi-Pai
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Liao, Lin-Yao
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Liao, Cheng-Yu
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Shieh, Han-Ping D.
A high dynamic range liquid crystal display (HDR-LCD) can enhance the contrast ratio of images by utilizing locally controlled dynamic backlight. We studied the HDR-LCD as a dual-panel display: a backlight module and a liquid crystal (LC) cell. As the gamma of the LC signal, the backlight module was also endowed with a gamma function to control the contrast ratio of HDR images. The inverse of a mapping function (IMF) method proposed as a dynamic gamma mapping curve for the backlight module, has been demonstrated to further improve in HDR image quality. By implementing the IMF method on a 37 '' HDR-LCD TV with 8 x 8 backlight zones, the image contrast ratio can reach similar to 20000:1 while maintaining high brightness, clear image detail, and an average power reduction of 30%.
Fast MPRT with High Brightness LCD by 120Hz Local Blinking HDR Systems
(2009)
Liao, Lin-Yao
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Chen, Chih-Wei
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Huang, Yi-Pai
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Yeh, Szu-Che
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光電工程學系
A 120Hz Local Blinking HDR system was proposed to significantly reduce MPRT down to 3.89ms and keep high brightness almost as well as conventional LCDs, that is distinct from the prior arts, such as Black Band Insertion, Blinking Backlight and Gray Frame Insertion (GFI), those may cause brightness decrement. Furthermore, the intrinsic benefit of high dynamic range (high contrast) and low power consumption also can be achieved.
Individually Adapted LC-lens Array for 3D Applications
(2014-12-12)
Huang, Yi-Pai
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Jen, Tai-Hsieng
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Chang, Yu-Cheng
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Shieh, Po-Yuan
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Chen, Chi-Wei
A low driving voltage with fast response LC-lens was developed. By implementing the LC-lens as an array structure, it can be adaptively used for 2D/3D switching and 3D rotation on auto- stereoscopic display. Additionally, it also can be utilized as a depth sensor for 3D capturing.
Inverse of mapping function (IMF) method for image quality enhancement of dual-panel displays
(2007)
Liao, Cheng-Yu
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Lin, Fang-Cheng
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Liao, Lin-Yao
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Huang, Yi-Pai
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Shieh, Han-Ping D.
A high dynamic range liquid crystal display (HDRLCD) can much.enhance the contrast ratio of images upon the locally controlled backlight. A novel method, inverse of mapping function (IMF), was demonstrated to further improve the HDR image quality from the information of each frame. By using IMF, the contrast ratio of image in a 37 '' HDR-LCD TV was successfully improved to similar to 20,000:1 with high brightness and clear image details. Besides, for mass production, the backlight of the 37 '' HDR-LCD TV was divide into 8x8 zones to lower the cost and hardware computation complexity.
Inverse of mapping function (IMF) method for image quality enhancement of high dynamic range LCD TVs
(2007)
Lin, Fang-Cheng
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Lia, Cheng-Yu
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Liao, Lin-Yao
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Huang, Yi-Pai
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Shieh, Han-Ping D.
A high dynamic range liquid crystal display (HDR-LCD) can much enhance the contrast ratio of the image on a locally controlled dynamic backlight. A novel method, inverse of mapping Junction (IMF), was demonstrated to further improve the HDR image quality from the information of each frame. By using the IMF method, the image contrast ratio in a 37 '' HDR-LCD TV was successfully improved to similar to 20,000:1 while maintaining high brightness and clear image details. Besides, for mass production purpose, the backlight of a 37 '' HDR-LCD TV was divide into 8x8 zones to reduce hardware computation complexity.
Liquid Crystal Lens Array for 3D Display and 3D Air-touch
(2013)
Huang, Yi-Pai
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Jen, Tai-Hsieng
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Chang, Yu-Cheng
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Wang, Guo-Zhen
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Shieh, Po-Yuan
A low driving voltage with fast response LC-lens by using high resistance material was developed. By implementing the LC-lens as an array structure, it can be adaptively used for multi-function of 3D displays. Furthermore, by combining with coded optical barrier with embedded optical sensors, it can yield 3D air-touch function.
Local Blinking HDR LCD Systems for Fast MPRT With High Brightness LCDs
(2010-05-01)
Liao, Lin-Yao
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Chen, Chih-Wei
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Huang, Yi-Pai
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光電工程學系
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Department of Photonics
A new impulse-type display named Local Blinking High Dynamic Range (HDR) LCD System was proposed, which utilized local dimming technology to achieve a local blinking effect that not only suppressed motion blur and reduce Moving Picture Response Time (MPRT) to 3.89 ms but also applied local image compensation to maintain image brightness and details without substituting high power light source. In addition, the intrinsic advantages, such as high dynamic range (high contrast ratio) and low power consumption were also achieved.
Precision focal-length measurement using imaging conjugates
(2012-11-01)
Liao, Lin-Yao
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Braulio de Albuquerque, F. C.
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Parks, Robert E.
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Sasian, Jose M.
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光電工程學系
A method for effective focal length measurement using imaging conjugates is discussed and demonstrated. This method is used to determine the effective focal length of an objective lens with precision and without the need to know the exact position of the principal planes by measuring relative distances of imaging conjugates. Focal length determination was done with the aid of an interferometer and with a precision of +/- 0.054%. A discussion of the method is presented and an error analysis discussed. This method can be used for characterizing optical systems with a wide range of focal lengths because of its simple experimental configuration. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.OE.51.11.113604]