Computer screen LED vs LCD

[fredreload]

Alright so, LED has fixed number of pixels, RGB, but LCD does not? Someone explain to me what ppi means in the below video, appreciated

 

This is where you get seizure

https://en.wikipedia.org/wiki/MicroLED

Edited February 26, 2018 by fredreload

[StringJunky]

19 minutes ago, fredreload said:

Alright so, LED has fixed number of pixels, RGB, but LCD does not? Someone explain to me what ppi means in the below video, appreciated

 

 

PPI is pixels per inch. 300ppi is photographic quality where the individual picture elements are invisible from a certain distance, so 650ppi is more than twice as good for resolution.  It's a bit pointless/superfluous but hey, mine's bigger than yours.   On  a sensor, rather than display, higher ppi/dpi is good because it means you can magnify the image more before the resolution becomes apparent.

Edited February 26, 2018 by StringJunky

[Strange]

Note that both LCD and LED displays are LCD displays!  The difference is just the type of backlight. An LCD display can be reflective (no backlight) or use a fluorescent or electroluminescent panel for illumination.

An LED display is an LCD using LEDs as a light source. 

An OLED display is a “real” LED display using an array of (organic) LEDs to create the image. 

[koti]

46 minutes ago, fredreload said:

Alright so, LED has fixed number of pixels, RGB, but LCD does not? Someone explain to me what ppi means in the below video, appreciated

 

This is where you get seizure

https://en.wikipedia.org/wiki/MicroLED

In simple words, PPI (pixels per inch) is the means of measuring resolution where the created image has an artificial source of light (TV’s, phone displays, projectors, etc) DPI (dots per inch) is the means of measuring resolution on printed paper or other media. Displays work with RGB color model, printed media works with CMYk color model. CIElab color model is used as a reference point for translation between one and the other...like when you see something on a monitor, hit print and hope to get the same result on paper and what you’ve seen on the monitor. Resolution (PPi, DPi) is the density of the pixels used in a system. Pixels are the smallest element of a display system or a print system, pixels vary greatly between systems and technologies. The seizures get worse and worse once you get deeper into these things as imaging is a complex subject.