System and method for realizing ultra-high-frame-rate gray level display of DMDs

A technology of a display system and a display method, which is applied in the field of image processing and can solve problems such as difficulty in increasing the frame rate

Inactive Publication Date: 2018-11-13
XIAMEN UNIV OF TECH
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Problems solved by technology

[0005] This gray-scale imaging method of DMD is based on the premise that the illumination light is constant. According to the formula, the time of each frame depends on T LSB and T w ,T w About 50*7=350 microseconds (global reset method), in order not to lose the image details determined by the low-level plane, T LSB The time cannot be too short, assuming 20 microseconds, then the frame time of 256 grayscale images is 5.4ms, and the frame rate is 185Hz. This frame rate can be reduced by reducing T LSB to improve, but t LSB Taking 20 microseconds is basically close to the limit, so it is difficult to increase the frame rate

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[0022] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] Unless the context clearly states otherwise, the number of elements and components in the present invention can exist in a single form or in multiple forms, and the present invention is not limited thereto. Although the steps in the present invention are arranged with labels, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted. It can be understood that the term "and / or" used herein refers to and covers any and all possible combina...

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Abstract

The invention provides a system and a method for realizing ultra-high-frame-rate gray level display of DMDs. The system for realizing ultra-high-frame-rate gray level display of DMDs comprises a computer and an imaging optical unit, wherein the computer converts a digital gray level image into an n-frame binary plane image, and carries out calculating to generate an n-frame binary energy modulation template image, wherein n is a positive integer; and the imaging optical unit is connected with the computer for displaying the n-frame binary plane image obtained by decomposition of the computer,and synchronously carries out modulation distribution on the light source energy according to the n-frame binary energy modulation template image. The system and the method have the beneficial effectsthat for the method for realizing ultra-high-frame-rate gray level display of the DMDs, by modulating the illumination light energy and the DMD display mode in real time, the one-to-one correspondence between the change of the light source and each plane of the gray level image is realized, through the 2N PWM energy modulation for the light source, the display time is replaced, and the ultra-high-frame-rate gray level display is realized. The invention further provides a method for realizing ultra-high-frame-rate gray level display of DMDs.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a grayscale display system and a display method for realizing a DMD ultra-high frame rate. Background technique [0002] DMD (Digital Micro-mirror Devices, digital micromirror device) truly realizes the gray level of the image controlled in an all-digital way, which is called binary pulse width modulation (PWM) technology. Through this technology, the video or image signal input to the DMD can be converted into a grayscale image with rich layers. [0003] Binary PWM is called 2 N PWM mode. The binary PWM modulation formula is: T PWM =T LSB *2 (N-1) . Among them, N is the number of bits of the pixel, T PWM is the weight of each bit pixel, T LSB is the display time of the least significant bit (LSB). Then the total time T to complete a grayscale display is: T w is the total waiting time for image data to be written to the DMD, called "deadtime". ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/20G09G5/02
CPCG09G3/20G09G5/02
Inventor 黄新栋尹华一陈铖颖施华
Owner XIAMEN UNIV OF TECH
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