How to test the yin and yang screen of Apple iPhone6?

Two methods to identify vertical screen: first, naked eye test method: adjust the screen brightness to the highest. Do not unlock the illuminated screen of the IOS6 system. Look at the gray area around the slider. Under the high-brightness white fluorescent lamp (such as Apple Store), the screen that can be seen clearly by slightly changing the angle (horizontal stripes are up and down, vertical stripes are left and right) should be changed into a striped screen. IOS7 system carefully watches the email icon, weather icon and app store QQ icon on the desktop, and you can see obvious vertical stripes and graininess. 4, 4s horizontal bar, horizontal bar test Generation 5, if the problem is vertical stripes, use vertical stripes. In the 4th and 4th generations, horizontal stripes existed. The flicker of vertical stripes is not obvious, but that of horizontal stripes is more obvious. Second, first adjust the screen to the maximum brightness, and open the website with the mobile phone safari: forums/attachment.php? AttachmentID = 364886 & AMPD = 65438+If there is no flicker or slight flicker, the screen quality is excellent (vertical stripes are not felt when using). From the feedback of most posts I have read, most of the vertical stripes are warm screens, and the color reproduction of this screen is more realistic, but it may not be acceptable for some oil used to cold screens. Screens are divided into the following four types: 1, yellow warm urine screen (4000)k or so 2, medium light warm screen (6500)k or so 3, medium cold screen (6500)k or so 4, ultra light cold screen (8000)k or so. The best screens are 2 and 3 perfect screens respectively. According to the survey, most screens on the iphone now use the second screen. The third screen is suitable for some people, but it is not excluded that it is a factory part left over from the past. Generally speaking, the most realistic color reproduction is a warm screen.