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Dear Sir/Madam,

I am writing to ask you to pay more attention to the backlight flickering issues on your LCD monitors with LED backlight. This is a problem not only for me but also for many other people who have had to return their brand new LCD monitors because these people notice uncomfortable flickering effect when using monitor at a low brightness setting. This is not specific for any particular manufacturer; it is an issue for almost all modern LCD LED monitors.

Here is a link to the in-depth explanation of this problem and why it has become especially acute with the new generation LED backlights:

http://www.tftcentral.co.uk/articles/pulse_width_modulation.htm

There are people who do not notice the flickering as such, but they feel some strain for their eyes. The strain goes away if using the monitor at its full brightness setting, so this is clearly a PWM related issue. And there are many more, who might have vision related problems in long term because of this issue, although they do not notice any flickering right now. Some people with soldering skills even make some modifications to fix the flickering by implementing and attaching their own PWM controllers to their monitor. This is a really desperate step because it obviously voids the manufacturer warranty for their monitors, so people would be glad to be able to avoid it, but there seems to be no other options right now.

I know this problem can be easy solved. People on various message boards have found certain LCD models which have a higher backlight frequency (PWM, pulse width modulation) and these monitors are much more comfortable for eyes. Unfortunately, on the time being there is only one LCD monitor model known to have a high PWM frequency (about 1200 Hz) and this certain model is hard to find because it is close to the end of its lifecycle on the market.

So again on behalf of many people, I ask you, please give us LCD monitors with higher backlight PWM frequencies.

I really hope this letter will be escalated and will reach the people who have enough authority to influence the LCD manufacturing process.

I am going to send this request to many manufacturers, and the first manufacturer to give a positive response and produce an LCD monitor with higher backlight PWM frequency, will get a great appreciation from many people and, most importantly, will get many happy buyers.

If you currently have any 23” LCD IPS monitor with high backlight PWM frequency (500Hz or more), please let me know and I will buy it and tell other people about it. But until that I just have to postpone buying a new LCD monitor.

Sincerely yours,

Maris Seimanovs

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