If individual pixels are blacked out, most likely you will have to replace the digitizer.
To understand, there are "two" screens. The "glass" and the "digitizer" where the digitizer is the panel that produces the pixels.
You will most likely have to get your digitizer and screen replaced
Yes. Under the glass of your device is an LCD screen. Black spots indicate that the screen was damaged when the glass cracked.
A damaged LCD will not reduce battery life. If it is damaged and has many dead pixels, it actually could strengthen the life, because no power is being used to light the pixels. Although, that effect will be so small that it probably won't be noticeable.
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So far only the MacBook Pro with 15" Retina Display has a 2880 x 1800 screen. This is 220 pixels per inch (87 pixels per cm); The 4th & 5th generation iPhone 4/4S and iPod Touch have smaller screens but at a higher density of 326 pixels per inch (128 pixels per cm).Otherwise, QSXGA at 2560 x 2048 is the highest resolution made - probably for Apple as well as PCs.
small pixels
one megapixel is a million pixels, so 9.2 mega pixels would be 9.2 million pixels, or 9,200,000 pixels.
123,200 pixels = 0.1232 megapixels.
Pixels
Learn about the Retina display built into your Mac. The pixel density of Retina displays is so high that your eyes can't detect individual pixels at a normal viewing distance. This gives content incredible detail and dramatically improves your viewing experience.
12 pixels tall 12 pixels wide.
It's better to more pixels.
it is 150xa50 pixels.
786432 pixels