[Galaxy Note 4 General] TML1504:
Update 11.11.2014: Reply from displaymate

Von: DisplayMate Support <support@displaymate.com>

Gesendet: Montag, 10. November 2014 16:25

An: Markus

Betreff: Re: Samsung Note4 Display Quality (XDA)

Thanks for your Email. Feel free to post this.

We get many Emails like yours with every display review article that we publish, with readers sending in comments and sometimes screen shots of their display, or even multiple displays side-by-side to accentuate the differences.

For our public article series we publish the results that we obtain. There is no question that there are always some defective units, substandard calibrations, variations between production lots and within production lots, variations in display performance, variations between displays from multiple suppliers and manufactured in different factories. We have no way to evaluate the scale, frequency, and validity of these issues based on reader Emails so we don't discuss them. All products, from displays to cars, have quality control and variation issues - consumers know this. We simply tell people that if the display is unsatisfactory then return it for exchange or refund.

For LCDs, a well known issue is the variation in the White LEDs used in the backlight - their color, brightness, and power efficiency all vary significantly. Manufacturers pay varying premiums to have the White LEDs pre-sorted into similar performance classes for their products.

We get many more Emails from unhappy iPhone and iPad customers than any other manufacturer. One possible source is that Apple uses many different suppliers for their displays. However, over a one year product cycle we may test a dozen iPhone and iPad units that are sent to us from multiple sources (including Apple competitors), and over many years we have never found any significant variations in display performance in our lab tests. I don't doubt that there are always some quality control and performance variations, but we have never seen any in the large number of Apple products that we have tested.

We don't get many Emails regarding Samsung OLED displays. Most seem to be the result of the sender leaving it in one of the default Vivid modes instead of the accurate (Cinema, Movie or Basic) mode that we use in our tests. Samsung is a single source manufacturer so that is not an issue. We also test many Samsung OLED devices (including many supplied by Samsung competitors) and have never seen any significant display performance variations within a given model. Again, I don't doubt that there are always some quality control and performance variations, but we have never seen any in the large number of Samsung OLED products that we have tested.

In any case, for our public article series we publish the display results that we obtain in our lab.

While it is difficult to get an objective statistical measure of the frequency and size of display performance variations, I highly encourage you to publicize this issue, perhaps via a youtube channel that can act as a central clearing house for this display issue.

Raymond Soneira

President of DisplayMate Technologies Corporation

Tel: 603-672-8500 Web: http://www.displaymate.com