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王琼华, Qiong-Hua Wang, Da-Hai Li, Bao-Jian Peng, Yu-Hong Tao, and Wu-Xiang Zhao
JOURNAL OF DISPLAY TECHNOLOGY,-0001,():
-1年11月30日
An optically written display based on up-conversion of near-infrared light is a newly emerging display technology. For filtering out unwanted colors from this light generator, multilayer dielectric color filters are designed for red, green, and blue screens, respectively. Layer-symmetric films are used in the designed filters and the conjugate gradient method is used to optimize the design. It is observed that the characteristics of the filters are good in the whole visible wavelength range when the incident angle is less than 40. The encompassed color triangle of the display with the color filters is larger than that without the color filters, and images with more saturated colors are obtained.
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【期刊论文】Edge-Lighting Light Guide Plate Based on Micro-Prism for Liquid Crystal Display
王琼华, Jin-Ren Yan, Qiong-Hua Wang, Da-Hai Li, and Jian-De Zhang
JOURNAL OF DISPLAY TECHNOLOGY, VOL.5, NO.9, SEPTEMBER 2009,-0001,():
-1年11月30日
We designed an edge-lighting light guide plate (LGP) based on a micro-prism structure for liquid crystal display. Its top and bottom surfaces have micro-prisms, and a layer of high reflection film is coated on the bottom surface. The principle of the LGP was analyzed. The optical simulation tool ASAP was used to calculate the apex angle and height of the micro-prism on the top of the LGP, the apex angle of the micro-prism on the bottom of the LGP and the emitting angle dependent luminous flux of the LGP. By adjusting the width of micro-prisms on the bottom, the LGP achieved uniform luminance. A 12-in LGP based on a micro-prism structure as an example was designed. The results proved that the LGP based on a micro-prism structure is thin and simple with uniform luminance and high efficiency.
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王琼华, Jian-De Zhang Qiong-Hua Wang (SID Senior Member) Da-Hai Li (SID Member) Jin-Ren Yan
Journal of the SID 17/9, 2009,-0001,():
-1年11月30日
A dual-cell-gap transflective liquid-crystal display (TR-LCD) with identical response time in both the transmissive and reflective regions is demonstrated. In the transmissive region, strong anchoring energy is used to decrease the response time, while in the reflective region, weak anchoring energy is used to increase the response time. And overdrive voltage technology is adopted to make the response time identical in both the transmissive and reflective regions. The device structure and operating principle of the TR-LCD was analyzed, the anchoring energy in the transmissive and reflective regions was designed, and the response time and electro-optic characteristics of the TR-LCD was calculated. The simulated dual-cell-gap TR-LCD demonstrated good performances.
Transflective liquid-crystal display, response time, anchoring energy, overdrive voltage
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王琼华, Di Wu Qiong-Hua Wang (SID Senior Member) Da-Hai Li (SID Member) Jian-De Zhang
Journal of the SID 18/1, 2010,-0001,():
-1年11月30日
An achromatic quarter-wave film using one twisted-nematic liquid-crystal (TNLC) cell, a chromatic half-wave plate, and a chromatic quarter-wave plate is presented. The Jones matrix is used to calculate the optical properties of the system. An optimal algorithm is used for optimizing the configuration parameters. Simulation results indicate that the designed configuration is capable of turning a linearly polarized light into perfectly circularly polarized light in the wavelength range 400-700 nm. The manufacturing tolerance of the cell gap and twisted angle of the TNLC are good.
Achromatic λ/, 4 film, Jones matrix, liquid crystal, optimization
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【期刊论文】Jump method for optical thin film design
王琼华, Lei Li, Qiong-Hua Wang, , * Da-Hai Li, and Hua-Rong Peng
14 September 2009/Vol.17, No.19/OPTICS EXPRESS 16920,-0001,():
-1年11月30日
This paper proposes a method called Jump method for optimization of optical thin films. The method is the combination of local search strategy using modified Coordinate-Wise Algorithm and global search strategy using modified Evolutionary Algorithm. Jump method can evolve the designs of optical thin films for good performances. The design of a dielectric beam splitter and an edge filter as examples is carried out and the results indicate that Jump method is a very robust algorithm for optical thin film designs.
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