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首页> 外文会议>Conference on MOEMS Display and Imaging Systems II; Jan 26-27, 2004; San Jose, California, USA >High-Resolution Laser-Projection Display System Using a Grating Electromechanical System (GEMS)
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High-Resolution Laser-Projection Display System Using a Grating Electromechanical System (GEMS)

机译：使用光栅机电系统（GEMS）的高分辨率激光投影显示系统

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摘要

Eastman Kodak Company has developed a diffractive-MEMS spatial-light modulator for use in printing and display applications, the grating electromechanical system (GEMS). This modulator contains a linear array of pixels capable of high-speed digital operation, high optical contrast, and good efficiency. The device operation is based on deflection of electromechanical ribbons suspended above a silicon substrate by a series of intermediate supports. When electrostatically actuated, the ribbons conform to the supporting substructure to produce a surface-relief phase grating over a wide active region. The device is designed to be binary, switching between a reflective mirror state having suspended ribbons and a diffractive grating state having ribbons in contact with substrate features. Switching times of less than 50 nanoseconds with sub-nanosecond jitter are made possible by reliable contact-mode operation. The GEMS device can be used as a high-speed digital-optical modulator for a laser-projection display system by collecting the diffracted orders and taking advantage of the low jitter. A color channel is created using a linear array of individually addressable GEMS pixels. A two-dimensional image is produced by sweeping the line image of the array, created by the projection optics, across the display screen. Gray levels in the image are formed using pulse-width modulation (PWM). A high-resolution projection display was developed using three 1080-pixel devices illuminated by red, green, and blue laser-color primaries. The result is an HDTV-format display capable of producing stunning still and motion images with very wide color gamut.
机译：伊士曼柯达公司已经开发出一种衍射MEMS空间光调制器，用于印刷和显示应用，即光栅机电系统（GEMS）。该调制器包含像素的线性阵列，这些像素能够进行高速数字操作，高光学对比度和良好的效率。器件的操作基于一系列中间支撑物使悬浮在硅衬底上方的机电带偏转。当被静电驱动时，带与支撑子结构相符，以在较宽的有源区域上产生表面浮雕的相位光栅。该设备被设计为二进制的，在具有悬挂色带的反射镜状态和具有色带与基板特征接触的衍射光栅状态之间切换。通过可靠的接触模式操作，亚纳秒级抖动的切换时间不到50纳秒。通过收集衍射阶数并利用低抖动，GEMS器件可用作激光投影显示系统的高速数字光学调制器。使用可单独寻址的GEMS像素的线性阵列创建颜色通道。通过在显示屏上扫掠由投影光学器件创建的阵列的线图像，可以生成二维图像。使用脉宽调制（PWM）形成图像中的灰度级。使用三个被红色，绿色和蓝色激光彩色原色照明的1080像素设备开发了高分辨率的投影显示器。结果便是HDTV格式的显示器，能够产生具有非常宽色域的令人惊叹的静止图像和动态图像。

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