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03-08-2020

CA

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Question about PWM dimming

2020-03-08, 17:48 PM

I am sensitive to PWM dimming, and looking to buy a Thinkpad T400 or T500 series. I've researched the various models on notebookcheck reviews to see which ones use PWM.  I understand one can order LCD panel parts and swap out screens relatively easily.

 

My question is: If I see a review of a T4xx or T5xx that says a certain model number does use PWM dimming, can I get rid of it by replacing the screen with one from a different model?  In other words, is it the panel itself, or is it the particular laptop model that causes PWM dimming?

 

Thanks.

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792 Posts

07-25-2013

AU

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Re:Question about PWM dimming

2020-03-08, 23:11 PM

Hi,

 

It's always best to buy the spec you want from the beginning. You should order the PC with the screen you want from the get go. Usually there's a selection of 2 to 3. Using panels between different models will more often fail than work, and definitely will not be officially supported.

====================================
I'm an INsider - not a Lenovo employee.
You can find me in gaming, Ideapad and Thinkpad forums most of the time.
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2 Posts

03-08-2020

CA

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Re:Question about PWM dimming

2020-03-09, 4:29 AM

Thanks, but because of the panel lottery, it's not always possible to know which panel one is getting. Besides, I can usually buy both a used model plus a replacement screen for it, for less than the cost of the model with the (hopefully) panel I want.

 

I would still like to know if the PWM flickering is caused by the panel itself, or by something else the panel is connected to.

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