Method for driving DMD (digital micromirror device) to display high-dynamic image in ultrahigh-frame frequency manner

Abstract

The invention discloses a method for driving a DMD (digital micromirror device) to display a high-dynamic image in an ultrahigh-frame frequency manner. The method includes the following steps that: based on requirements of a DMD to display a high-dynamic image in an ultrahigh-frame frequency manner, an image of which the pixel dynamic range is 2<N> is split into 1 to N levels of bitmaps; based on the shortest time required by DMD hardware to load the bitmaps, respective modulation display time of the 1 to N levels of bitmaps is calculated, and 1 to M levels of bitmaps which require reversion operation are determined, and the modulation display time of M bitmaps which are obtained through reversion operation is respectively set as the shortest time required by the DMD to load the bitmaps; the 1 to N levels of bitmaps and the M bitmaps which are obtained through reversion operation are sequentially loaded to the DMD and are displayed according to the set modulation time, and therefore, ultrahigh-frame frequency display of the high-dynamic image can be realized. With the method of the invention adopted, limitation on a pulse width modulation method, of time required by the DMD to load the bitmaps can be eliminated. When the method is applied to 8-bit-gray-above high-dynamic image DMD display, the display frame frequency can be significantly improved.

Description

technical field [0001] The invention relates to a driving method for displaying high dynamic images at a DMD ultra-high frame rate, which is suitable for an ultra-high frame rate target simulation test system to realize the test and evaluation of a high frame rate high dynamic range detector. Background technique [0002] To achieve high-quality testing and evaluation of high frame rate and high dynamic range detectors, it is necessary to design a reasonable and perfect target simulation test system. According to the Nyquist sampling theorem, the output frame frequency of the simulation system should not be less than twice the detector operating frequency. Therefore, in order to make the target image simulated by the simulation system closer to the real situation, it is necessary to increase the output frame rate of the system as much as possible while ensuring the high dynamic range of the image. [0003] The target analog output device of the simulation system is a digita...

AI Technical Summary

Problems solved by technology

However, since the time for DMD registers to load a complete bitmap has a minimum limit, and the minimum time unit of pulse width modulation cannot be less than the time for DMD to load a complete bitmap, otherwise the modulated bitmap display time cannot meet the ratio of pulse width modulation relationship, so the minimum time required for DMD to load a bitmap limits the increase in the frame rate of DMD display images

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