![]() | #12361 | |
BHPian ![]() Join Date: Dec 2009 Location: Bangalore
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Or the iPhone screen has other issues. | |
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![]() | #12362 | |
BHPian Join Date: Aug 2009 Location: Mumbai
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He stated that it would take time for the eyes to get used to, with a new screen, just like it takes time when a person begins to use glasses for the first time. He prescribed an eyedrop called optimoist or something, for 7 days. Along with that, I turned off TRUE Tone, white point is at 81% and screen brightness at 70%. My eyes own the phone now.I don't know what helped, whether the doctor's visit or the settings or both or none, but I can use the OLED screen without any issues now. ![]() | |
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![]() | #12363 | |
Senior - BHPian ![]() Join Date: Nov 2009 Location: Bombay
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https://www.oled-info.com/files/Sams...nfographic.jpg Very happy for you Ritesh! I got this "fix" from the iPhone store as well as Chetan from our team, however with "reduce whitepoint" I felt the screen to be dull and washed out. This fix was not for me, neither did I want to take a chance after what I went thru of the issue building in the background while not feeling it immediately. Chetan - you are correct again, not really missing out on technical features etc with the Note 10 Plus, just could not scratch the iPhone itch. The 11 while being LCD is a small screen for me and again appears dull to look at unless at 100% brightness all the time, maybe. Cheers | |
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![]() | #12364 | |
Senior - BHPian ![]() Join Date: Jan 2010 Location: Bangalore
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On my Note 8 I've experienced something similar where if I stare at the screen a lot ~5-6 hours my right eyelid begins to twitch. Never happened with LCD screens on my previous phone or laptop, but something I've observed when using LED screens. I hope they sort this out in future when most devices begin to adopt LED screens. | |
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![]() | #12365 |
BHPian ![]() | ![]() Just a query around the same topic of LED screens. How come this does not effect LED TV viewing? |
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![]() | #12366 |
BHPian ![]() Join Date: May 2010 Location: KA51/KL66
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![]() | #12367 |
Distinguished - BHPian ![]() ![]() Join Date: Jun 2012 Location: BengaLuru
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As far as I know, the mass market LED TVs are LED backlit LCD screens. They are not OLED screens except the expensive TVs with big screen areas. In the LED-LCD TVs, the LED backlight is not dimmed to an extent that it will affect the eye. Even in the Iphone, the flickering is evident only when the brightness is less than 50%. The LED backlights of televisions do not run at such a low level IMO since these low levels are more relevant for smaller displays which are viewed from a closer distance. Rather than the level, I would say that the OLED display of a phone has to have a higher brightness range compared to a television since the phone has to keep its visibility up to mark both in sunlight as well as a dark room. This is why the PWM range also will be quite high, from 100% duty cycle to as less as 25% IIRC. LED TVs do not have to cater to such a huge range of brightness level and wont need this much variation in the LED brightness control. Last edited by audioholic : 31st October 2019 at 11:18. |
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![]() | #12368 |
Senior - BHPian ![]() Join Date: Apr 2011 Location: Dubai/Bengaluru
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| ![]() LED TV does cause eye strain. I cant watch TV for hours. Main thing is not to forget to blink, and keep eyes moist. Also, initially I used to hear about some coating on the panel that reduced viewing fatigue. But nowadays I guess that is standard in every LED TV. |
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![]() | #12369 |
BHPian ![]() Join Date: Jul 2012 Location: Mumbai
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![]() | #12370 | |
Senior - BHPian ![]() Join Date: Nov 2009 Location: Bombay
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For example, your problem with the Note 8. I used the Note 8 for two years without any issues. Let's hope for the best and see what the future brings. Cheers | |
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![]() | #12371 |
BHPian ![]() Join Date: Dec 2009 Location: Bangalore
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| ![]() In LCD screens brightness is controlled by reducing the input voltage to the backlight. In OLED since there is no backlight and the pixel itself is emitting light, reducing voltage will shift the color of the pixel. Hence it resorts to switching on and off the pixel at a very high frequency. So for 50% brightness it switches off the pixel for about 1/200 of a second and then turns on for 1/200 of a second. For a lower brightness the amount of time it is on is reduced. This is what causes flicker. Newer OLED panels are resorting to voltage reduction (DC dimming setting), but they can't do away with the flicker mechanism completely. For very low brightness it still resorts to flicker. So DC dimming only reduces the problem. Even in LCD panels, the backlight is an LED, so in some phones it resorts to flicker for very low brightness. But most of them do not. Its better to check the model before buying. here is a list of devices and their ranking. You may want to filter it by mobile phones. https://www.notebookcheck.net/PWM-Ra....163979.0.html |
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![]() | #12372 |
BHPian Join Date: Oct 2015 Location: Hosur
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| ![]() The posts on the LCD and LED displays are really enlightening! I used to have severe headaches often when i was using a note 9. Since May i jumped to iphone XR and the headaches are gone. Now it makes sense to me. I think I will stick to LCD displays of iphone even in future. |
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![]() | #12373 |
BHPian ![]() | ![]() Guys, Need your help. I have a 2018 iPhone X. It's running on iOS 12. It switches off on its own all of a sudden and then it takes me at least 10-15 attempts trying various things like charging it, pressing the power button, pressing the power button and volume button together. This has happened twice in 15 days. The last time it happened, I was at a remote place in Germany where the phone was my only source of direction(was using gmaps). Today it happened again. What could be the reason ? |
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![]() | #12374 | |
Team-BHP Support ![]() Join Date: Sep 2010 Location: All over!
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Any reason you're holding off on iOS 13? 13.2 is out so it's pretty stable now. Try updating, maybe it'll clear some software/firmware issues. If it's an hardware issue, visiting the Apple Store might be of assistance. | |
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![]() | #12375 | |
BHPian ![]() | ![]() Quote:
The weather there was a bit chilly 8-12c range. But I'm back in Mumbai and it happened again today, so I doubt that might be the issue. May be I will update it to iOS 13 and see, iPhone X folks how is iOS 13 holding up ? | |
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