基于数字微反射镜与光源复合编码的高帧频显示方法

High Frame Rate Display Method Based on Composite Coding of Digital Micro Mirror and Illuminant

摘要:

作为常用显示器件,数字微镜器件(DMD)使用传统的脉冲宽度调制(PWM)显示方法受最小脉冲宽度限制,无法满足高帧频显示的需求。文章提出基于光源与DMD复合编码的高帧频显示技术,利用光源调制解决脉冲宽度调制导致的位平面显示时间随位平面等级指数增长的问题。通过构建包含驱动模块、光源和DMD的显示系统,采用低4位光源脉冲宽度调制与高4位DMD显示时间宽度调制相结合的方法,将8位灰度图像的显示帧频提高至2461Hz。

Abstract:

As a commonly used display device, digital micromirror device (DMD) uses the traditional pulse width modulation (PWM) method to display grayscale images, which can not meet the demand of high frame rate display due to the limitation of minimum pulse width. Thus we proposed a high frame rate display technology based on composite coding of illuminant and DMD in this paper. By adding the modulation of illuminant, the problem of exponential growth of bit plane display time with bit plane level caused by pulse width modulation is avoided. A display system consists of driver module, illuminant and DMD was built. In our test, by applying the illuminant modulation to lower 4bit and pulse width modulation to higher 4bit, the display system can achieve 2461Hz frame rate displaying 8bit grayscale image.