High contrast ratio and compact-sized prism for DLP projection system

被引：18

作者：

Huang, Yung-Chih ^{[1
]}

Pan, Jui-Wen ^{[2
,3
,4
]}

机构：

[1] Natl Chiao Tung Univ, Inst Lighting & Energy Photon, Tainan 71150, Taiwan

[2] Natl Chiao Tung Univ, Inst Photon Syst, Tainan 71150, Taiwan

[3] Natl Chiao Tung Univ, Biomed Elect Translat Res Ctr, Hsin Chu City 30010, Taiwan

[4] Chi Mei Med Ctr, Dept Med Res, Tainan 71004, Taiwan

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 14期

关键词：

ILLUMINATION SYSTEM; MINI PROJECTOR; LIGHT-SOURCE; DESIGN; DMD;

D O I：

10.1364/OE.22.017016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, a novel light separator with contrast ratio enhancement but maintaining the optical efficiency of the DLP projection system is proposed. The main capability of the novel light separator is to direct the uncontrolled light away from the image system. The working theorem for the novel light separator is derived as well. Uncontrolled light is kept away from the image system by a total internal reflection surface, thereby effectively improving the image quality. Compared with the conventional contrast ratio enhancement method, the FO:FO contrast ratio can be improved from 839: 1 to 48250: 1, the ANSI contrast ratio can be improved from 180: 1 to 306: 1, while the image system efficiency remains at 76.2%. (C) 2014 Optical Society of America

引用

页码：17016 / 17029

页数：14

共 17 条

[1] Off-axis illumination design for DMD systems [J].

Bowron, JW ;

Jonas, RP .

DESIGN OF EFFICIENT ILLUMINATION SYSTEMS, 2003, 5186 :72-82

[2] Design of illumination and projection optics for projectors with single digital micromirror devices [J].

Chang, CM ;

Shieh, HPD .

APPLIED OPTICS, 2000, 39 (19) :3202-3208

[3]

Marks S. P., 2009, NEW SCI, V201, P18

[4] Contrast-improving methods for digital micromirror device projectors [J].

Meuret, Y ;

De Visschere, P .

OPTICAL ENGINEERING, 2003, 42 (03) :840-845

[5] High efficiency pocket-size projector with a compact projection lens and a light emitting diode-based light source system [J].

Pan, Jui-Wen ;

Tu, Sheng-Han ;

Wang, Chih-Ming ;

Chang, Jenq-Yang .

APPLIED OPTICS, 2008, 47 (19) :3406-3414

[6] Portable digital micromirror device projector using a prism [J].

Pan, Jui-Wen ;

Wang, Chih-Ming ;

Sun, Wen-Shing ;

Chang, Jenq-Yang .

APPLIED OPTICS, 2007, 46 (22) :5097-5102

[7] High contrast ratio prism design in a mini projector [J].

Pan, Jui-Wen ;

Wang, Hsiang-Hua .

APPLIED OPTICS, 2013, 52 (34) :8347-8354

[8] Achromatic design in the illumination system for a mini projector with LED light source [J].

Pan, Jui-Wen ;

Lin, Sheng-Han .

OPTICS EXPRESS, 2011, 19 (17) :15750-15759

[9] The Compact Systems Design Based on DMD and the Straight Line 2-Channel LED for a Mobile Embedded Pico Projector [J].

Shin, Sung Chul ;

Jung, Yunsuk ;

Ahn, Tae-Jeong ;

Jeong, Sang Sik ;

Lee, Seung-Gyu ;

Choi, Kwang-Yeol .

JOURNAL OF DISPLAY TECHNOLOGY, 2012, 8 (04) :219-224

[10]

Smith W. J., 2008, MODERN OPTICAL ENG, P185

← 1 2 →