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DLP & MEMS
DLP LightCommander Development Platform
Difference of Lifetime of DMD between 2 situations
Hi.I want to confirm about following.
Is the lifetime of DMD different between these two situations?
1・[Cock of the each mirror's control]500Hz and ,[ Pattern's changing timing] 68Hz(to use 1.8V ext )
２・[Cock of the each mirror's control]700Hz and ,[ Pattern's changing timing] 68Hz(to use 1.8V ext )
[COMMON]Num of patterns are 4
And I want to know the detail reason.
Answer is NO. Both the conditions valid for DMD operation point of view so one would work same as the other. There is no clear advantage of one over other.
Also, I am interested to know why you want to create a configuration for high frame rate (say 500 or 700Hz) and then trigger at lower frame rate (say 68Hz)?
If a post answers your question, please click on "Verify Answer" button
Thank you for your reply.
Is it mean that when we use the DMD at 8bit-Grayscale-Mode if the external hardware trigger was 6Hz,DMD's 255-gradation was not expressed well(As Lighting image)?
[Following is an extreme talk]
I want to change Pttern at 6Hz to use the external hardware trigger.And I want to express 255-gradation well.How should I do?
No, 255- gradation can be well expressed at 6Hz. The point I wanted to highlight was about the correspondence between FrameRate selection and H/W trigger should closely be related.
You should be able easily refresh 8bit grayscale image at 6Hz with 255-gradation.
Set FramRate = 6Hz
Set CameraExposure Time = 166660 uSec
Frame Trigger = External H/W 3.3 or 1.8 Volt.
So every h/w trigger 1 8bit grey scale pattern is displayed.
And I want to ask about lifetime in here.So I will ask about [Frame Rate] in another forums that you are answerring.
Does the frequency effect to Lifetime?
For the DMD as long as you are driving it within a valid frequency range condition. It should not matter. So, there is nothing like running DMD at lower or higher frequency betters or worsens the life time.
Hi SanjeevThank you for your reply.And I was able to understand it that I want to know.Thank you.
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