Browsing by Author "Shieh, Han-Ping D."

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30 nm resolution x-ray imaging at 8 keV using third order diffraction of a zone plate lens objective in a transmission microscope
(2006-11-27)
Yin, Gung-Chian
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Song, Yen-Fang
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Tang, Mau-Tsu
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Chen, Fu-Rong
;
Liang, Keng S.
A hard x-ray transmission microscope with 30 nm spatial resolution has been developed employing the third diffraction order of a zone plate objective. The microscope utilizes a capillary type condenser with suitable surface figure to generate a hollow cone illumination which is matched in illumination range to the numerical aperture of the third order diffraction of a zone plate with an outmost zone width of 50 nm. Using a test sample of a 150 nm thick gold spoke pattern with finest half-pitch of 30 nm, the authors obtained x-ray images with 30 nm resolution at 8 keV x-ray energy. (c) 2006 American Institute of Physics.
3D Air-Touch User Interface With High Touch Accuracy on Stereoscopic Displays
(2016-05)
Ting, Chih-Hung
;
Jen, Tai-Hsiang
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Chen, Chun-Ho
;
Shieh, Han-Ping D.
;
Huang, Yi-Pai
To interact with stereoscopic images through 3D air-touch technology, the depth information for a touched 3D virtual object and the fingertip position should be aligned accurately. However, the fused 3D position is affected when the virtual object is blocked by the fingertip. Additionally, the 3D image with a large disparity decreases 3D touch accuracy. In order to improve the touch accuracy, virtual references and 3D image feedback were introduced respectively, and the touch accuracy was more than 90% based on a human interaction experiment.
3D mobile display based on dual directional lightguides
(2005)
Chu, Yu-Mioun
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Chien, Ko-Wei
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Shieh, Han-Ping D.
;
Chang, Jim-Min
;
Hu, Aaron
A novel light direction controlling backlight for 3D mobile display was proposed and fabricated. This backlight consists of two identical lightguides which are sysmmetrically placed. One plane of each lightguide is patterned with micro-grooves structure. With the specially deisgned lightuides, the emitting light can be redirected to the left and right eyes respectively by sequentially switching the light sources. The groove angle and spacing of micro-grooves on the lightguides are tuned to achieve directionality and uniformity of greater that 80%. Crosstalk of les than 7% was also obtained. In addition, the module provides the compatibility in 2D and 3D modes.
A Color Break-Up Suppression Method, Stencil-FSC Method, for Field-Sequential-Color(FSC) LCDs with low Power Consumption
(2008)
Huang, Yi-Pai
;
Lin, Fang-Cheng
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Wei, Ching-Ming
;
Shieh, Han-Ping D.
;
Tsai, Chi-Chung
Field sequential color liquid crystal display (FSC-LCDs) is a display without color filter, so it achieves several attractive advantages. However, it has a serious issue called color breakup (CBU), which degrades image quality and causes viewers uncomfortable. Consequently, the "Stencil-FSC" method, which utilized multi-color image in a single field, was proposed to suppress CBU. Moreover, optimizations of hardware parameters were done to get the optimal CBU suppression. Finally, the Stencil-FSC method was successfully demonstrated on a 32-inch FSC-LCD with effectively suppressed CBU, resulting contrast ratio of more than 5,500:1, and average power consumption of less than 45 Watt.
A field sequential color LCD base on color field arrangement for color breakup and flicker reduction
(2007)
Hsu, Ya-Ting
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Lin, Fang-Cheng
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Chen, Chun-Ho
;
Huang, Yi-Pai
;
Shieh, Han-Ping D.
Field sequential color liquid crystal displays (FSC-LCDs) have several original benefits, including higher light efficiency, definition, and color saturation than those of conventional LCDs. However, FSC-LCDs are well known that the color breakup (CBU) is the serious issue needed to be solved. We have developed a new driving technique on a 5.6-inch OCB mode FSC-LCD. This proposed 4-color field arrangement (4-CFA) method can effectively eliminate the CBU of FSC-LCDs.
A Field Sequential Color LCD Based on Color Fields Arrangement for Color Breakup and Flicker Reduction
(2009-01-01)
Chen, Chun-Ho
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Lin, Fang-Cheng
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Hsu, Ya-Ting
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Huang, Yi-Pai
;
Shieh, Han-Ping D.
The field sequential color (FSC) mechanism can effectively generate multi-primary color fields in temporal sequence to form a full-color image. Color breakup (CBU), however, has appeared intrinsically in conventional FSC displays to degrade visual qualities. A novel CBU suppression method, color fields arrangement (CFA), was proposed to eliminate the artifacts for FSC liquid crystal displays (LCDs). The modified order of consecutive color fields results in superimposed color images on a retina without CBU. Additionally, the 4-CFA method with a field rate of 240 Hz was found to avoid the flicker phenomenon on static images. The proposed method was successfully implemented on a 5.6-in optically compensated bend (OCB) LC panel. Our results confirm that the visibility of CBU artifacts can be reduced as the evaluation of dynamic and static models.
A human visual model for color break-up artifact in design field-sequential color LCDs
(2007)
Chen, Sheng-Chang
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Yan, Shu-Ping
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Cheng, Yu-Kuo
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Lin, Fang-Cheng
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Wei, Ching-Ming
A model to evaluate the color break-up (CBU) of field-sequential color liquid crystal display (FSC-LCD) had been successfully established. In order to quantify the CBU, "Color Break-Up Angle (CBUA)" was proposed as the evaluation index. From the psychophysical experiments, the CBUA=0.26 degrees was reported as the averaged threshold value for indistinguished color break-up. Consequently, the minimum frame rate could be derived from the model to suppress CBU in the various FSC-LCDs.
A non-selenization technology by co-sputtering deposition for solar cell applications
(1970-01-01)
Jheng, Bao-Tang
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Liu, Po-Tsun
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Wu, Meng-Chyi
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Shieh, Han-Ping D.
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光電工程學系
"This work presents a novel method to form polycrystalline Cu(In1-xGax)Se-2 (CIGS) thin film by co-sputtering of In-Se and Cu-Ga alloy targets without an additional selenization process. An attempt was also made to thoroughly elucidate the surface morphology, crystalline phases, physical properties, and chemical properties of the CIGS films by using material analysis methods. Experimental results indicate that CIGS thin films featured densely packed grains and chalcopyrite phase peaks of (112), (220), (204), (312), and (116). Raman spectroscopy analysis revealed chalcopyrite CIGS phase with Raman shift at 175 cm(-1), while no signal at 258 cm(-1) indicated the exclusion of Cu2-xSe phase. Hall effect measurements confirmed the polycrystalline Cu(In, Ga)Se-2 thin film to be of p type semiconductor with a film resistivity and mobility of 2.19 x 102 Omega cm and 88 cm(2)/V s, respectively. (C) 2012 Optical Society of America"
A novel 3D double screens display
(2006)
Lai, Chun-Hung
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Chen, Chun-Ho
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Shieh, Han-Ping D.
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光電工程學系
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Department of Photonics
A novel 3D double screens display system including a planar mirror and a micro-optical structure is proposed to yield dual full-sized 3D images. The lenticular-lenses-based micro-optical structure can generate 3D function and double screens function by rotating color filter's pixel layout with respect to the lenticular-lenses' positioning direction. Viewers can enjoy two image screens simultaneously with a planar mirror aligned. The proposed system has high potential on transforming the ordinary flat panel displays to 3D double screens displays.
A Novel Architecture for Autostereoscopic 2D/3D Switchable Display Using Dual Layer Strip Patterned OLED Backlight Module
(2014-05-01)
Wang, Yi-Jun
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Liu, Jun
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Tan, Jian
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Yang, Bo-Ru
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Ding, Wei-Xian
A novel backlight module that integrates dual layer strip patterned organic light emitting diode (DLSP-OLED) for 2D/3D switchable display was demonstrated. The DLSP-OLED functions as a parallax barrier in 3D mode and a planar light source in 2D mode. The results indicated that the backlight module with a thin form factor (similar to 1.1 mm) can achieve uniformity of 91% in 2D mode, and increased optical efficiency by a factor of 2.8 with a crosstalk of less than 6% in 3D mode, compared with the conventional 2D/3D switchable display. A fast switching rate (<1 ms) with simple operation can eliminate the visual fatigue caused by flicker during the switching. In addition, this configuration can function localized 3D display by modulating the DLSP-OLED individually.
A novel patterned diffuser for high uniform and high bright LCD backlights
(2007)
Lo, Yu-Chun
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Fang, Jen-Yu
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Huang, Yi-Pai
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Shieh, Han-Ping D.
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Yu, Gu-Sheng
A novel patterned diffuser of which the diffusivity can be optimized spatially for the non-uniform luminance distribution backlights. was designed and realized. An 11% improvement in the brightness uniformity was successfully demonstrated in a 7-in side-edge backlight without sacrificing the brightness.
A novel pixel circuit compensating for poly-Si threshold-voltage shift and degradation of OLED for emi-flective display
(2007)
Lin, Kun-Yueh
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Yang, Bo-Ru
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Shieh, Han-Ping D.
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光電工程學系
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Department of Photonics
A novel pixel circuit design of poly-silicon backplane for emi-flective display that integrated a reflective liquid crystal display (R-LCD) and a top-emission organic emitting diode (TOLED) was proposed. The pixel circuit could compensate both the threshold voltage shift of poly-silicon transistors and the turn-on voltage shift of TOLEDs.
A Pressure-Sensitive Impedance-Type Touch Panel With High Sensitivity and Water-Resistance
(2018-07-01)
Liu, Shi-Yu
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Pan, Jin
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Lu, Jian-Gang
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Shieh, Han-Ping D.
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顯示科技研究所
A pressure-sensitive impedance-type touch panel which detects impedance of sensors to identify touch position and applied pressure is demonstrated. It shows high pressure sensitivity in the low pressure regime, high water-resistance, low hysteresis, and high durability, and enables multilevel pressure detection. Because impedance-type sensors act as touch sensors as well as pressure sensors, fabrication process and device architecture can be simplified. Two substrates of the touch panel are bonded together without spacers or bezel tapes in between, improving the uniformity of compressive strain in current pressure-sensitive touch panels. The touch solution offers a new measurement mechanism for sensors involving non-conductive to conductive transition and has great potential for application in wearable interactive devices.
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.
A visual model of color break-up for design field-sequential LCDs
(2007)
Yan, Shu-Ping
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Cheng, Yu-Kuo
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Lin, Fang-Cheng
;
Wei, Ching-Ming
;
Huang, Yi-Pai
A model to evaluate the color break-up (CBU) of field-sequential color liquid crystal display (FSC-LCD) had been successfully established. In order to quantify the CBU, "Color Break-Up Angle (CBUA)" was proposed as the evaluation index. Front the psychophysical experiments. the CBUA=0.22 degrees was reported ass the averaged threshold value for indistinguished color break-up. Consequently, the minimum frame rate could be derived from the model to suppress CBU in the various FSC-LCDs.
Adaptive current scaling pixel circuit for a-Si : H AMOLED
(2005)
Huang, Jian-Zhi
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Cheng, Jung-An
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Lin, Yen-Chung
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Cheng, Wayne
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Shieh, Han-Ping D.
An adaptive current scaling pixel circuit for a-Si:H TFT process has been demonstrated. The adaptive current scaling is achieved by insetting a small cascaded storage capacitor to the traditional pixel circuit without affecting the aperture ratio. The proposed pixel circuit is capable of shorting the programming time without sacrificing the power consumption. Hence, the proposed pixel circuit is suitable for the large size and high resolution AMOLED application.
Adaptive LC/BL feedback control in field sequential color LCD technique for color breakup minimization
(2008-09-01)
Huang, Yi-Pai
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Chen, Ke-Horng
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Chen, Chun-Ho
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Lin, Fang-Cheng
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Shieh, Han-Ping D.
A full-color image on field sequential color (FSC) displays is composed of color fields in temporal sequence. With the FSC mechanism, color filters of liquid crystal displays (LCDs) can be removed to heighten the light efficiency and lower the material cost. Color breakup (CBU), however, has appeared intrinsically to degrade visual qualities. A novel gray level determination of liquid crystal and backlight (LC/BL) was proposed to suppress the CBU artifact on FSC-LCDs. Based on the image content in each frame, a dominated color-mixed field was found to minimize the color difference between the CBU and original image. Additionally, the feedback algorithm for the adaptive LC/BL signals was developed and implemented on a 32-inch optically compensated bend (OCB) mode LC panel. According to the evaluation of experiments and observations, the proposed method has been demonstrated to greatly suppress CBU in LCD applications.
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.
Ambient Stability Enhancement of Thin-Film Transistor With InGaZnO Capped With InGaZnO:N Bilayer Stack Channel Layers
(2011-10-01)
Liu, Po-Tsun
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Chou, Yi-Teh
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Teng, Li-Feng
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Li, Fu-Hai
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Fuh, Chur-Shyang
A thin-film transistor (TFT) with bilayer stack structure of amorphous nitrogenated InGaZnO (IGZO) (a-IGZO:N) on an IGZO channel is proposed to enhance device stability. The a-IGZO: N acting as a back-channel passivation (BCP) is formed sequentially just after the sputter-deposited amorphous IGZO (a-IGZO) film with in situ nitrogen incorporation process. The a-IGZO:N can effectively prevent the a-IGZO channel from exposing to the atmosphere and retarding interactions with ambient oxygen species. Also, the optical energy bandgap of the a-IGZO:N film is decreased due to the addition of nitrogen. This causes the a-IGZO TFT with a-IGZO:N BCP to exhibit high immunity to the ultraviolet-radiation impact.
AMOLED panel driven by time-multiplexed clamped inverter circuit to reduce complex control signals
(2008-07-01)
Chen, Chun-Ho
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Chen, Ke-Horng
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Chen, Che-Chin
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Chen, Yi-Fu
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Shieh, Han-Ping D.
A time-multiplexing technique employing a pulse-width-modulation (PWM) charge-pump scheme for driving active-matrix organic light-emitting-diodes (AMOLEDs) is described. This scheme greatly reduces the number of control lines. The two-or four-phase PWM driving technique not only reduces costs through the simplification of manufacture but also improves the uniformity and lifetime of OLED panels. Experimental results show that the proposed circuit effectively and precisely controls the timing of OLED data-writing and light emission.