Hello, my name is Elaine
Currently working for product management
at the Lenovo consumer PC department
It's so nice to meet you all here on Youtube.
Laptop these days comes with pretty high quality displays
with tons of promising features
When it's about choosing the right laptop
screen is one of the top three considerations
even top one
Color saturation accuracy, eye protection or not
all have great effect on your vision experience and vision health
If you are also interested in getting a suitable laptop
and wondering which screen features you should take into consideration
this guide is for you
For the past 2 years
Huawei has entered the PC market
release 2k and 3k screen Mate book
While Lenovo mainstream products follow up with 2.5K and 2.8K screens
There is no doubt that laptop screens will be entering a 2k screen era
which will benefit us all
over the past decade
FHD has been dominating in the PC market
Now we have a game changer
Here I will take the Lenovo 2.8K screen as an example
explaining every parameter comprehensively
14 inch the size of a screen
starting at the top left corner and pulling diagonally to the bottom right to corner
Currently we have
13.3 inch, 14 inch, 15.6 inch and 16 inch
16:10 stands for screen scale
16:9 can bring out further horizontal content
more suitable for video entertainment
While the trending golden ratio 16：10
combines the entertainment appeal with productivity scenarios.
From that it can show more vertical content
For example, we can see more lines in the word document
2800x1800, this is parameter of a resolution ratio
Each represents pixel numbers in the x and y directions
It is the key indicator of screen fitness.
For the same screen size
the higher the resolutions, the better.
Then what about different screen sizes?
Well, the resolution ratio is no longer the full measurement of screen accuracy.
Then comes to the concept PPI
which is the number of pixels per square inch
but what if we raised up without limit.
Will that help?
actually doesn't help much
laptop screen that reaches more than 220 PPI is called retina screen
Notebook viewing distance is about fifty cm
the human eyes is about 1.0 vision
so you can't tell the difference when it's about 220 PPI
Based on that
for each screen size to reach a resolution of 220 PPI
It should be like that
13.3 inch, 2.5 k
14 inch, 2.7 k
15.6 inch, 2.9 k
16 inch, 3k
so if you have high demand for screen fitness you should follow the standard.
This is an important sign to distinguish high-end laptops
and mainstream ones
as mainstream products are mostly FHD and 2k
Currently, several Lenovo laptops has met this standard
13 inch YOGA Slim 7i
14 inch YOGA Slim 7, YOGA 9i, YOGA Slim 9i
15.6 inch and16ch include some 15.6 inch Windows high-end models
4K version, such as ThinkPad P1
100% sGB, this is the parameter of a color gamut.
There are several standards for it.
Including NTSC, sRGB, DCI-P3 and Adobe
NTSC comes from television industry standard
sRGB is from Microsoft and HP
which is widely used in monitors, printers on the Internet.
DCI-P3 is applied to digital movies
while Adobe is applied to color print industry.
At present, the most common one is sRGB
with sRGB as a reference.
45% NTSC is about 70% sRGB
72%NTSC is about 100%sRGB
100%DCI-P3 is about 130% sRGB
100% Adobe is about 130%sRGB
On windows, the most common use, is still 100% sRGB
which is pretty much what most people need in general
Personally, I would never accept anything less than 100% sRGB
unless you don't need the laptops own monitor at all
just an external monitor.
Here are some recommendations
Lenovo YOGA series, Idea series and Think Book series
next 90 Hz refresh rate
which takes the lead in a gaming book.
For most people, buying ultra slim notebook
we also wanna give it a try for gaming
this year ultra slim with high refresher rate will be a trend.
Speaking of the high refrigerate.
It means how many times per second the display is able to draw a new picture.
For example, if your display has a refrigerate of 144 Hz
It is a refreshing the image
144 times per second
So it's a vital factor for gaming users
as it might help you get the upper hand in the gaming battlefield
The common refresh rate are 60Hz, 90Hz, 120Hz, 144Hz, and 165Hz
the larger the number is the faster the refresh rate will be.
In which you will be endowed with smoother images,
less trailing,smear and response time.
Currently we only have YOGA slim 7i 14 '' 2021 for this configuration.
(Correction:now we have IdeaPad 5 Pro 16'')
Other ultra slim notebooks are all 60Hz
if you are into ultra- slim and gaming at the same time
This is the only option for the moment.
As for the give me notebooks
120 Hz and 144 Hz is a mainstream setup.
Soon it will be 165 Hz
400 nit,it's the parameter of brightness,
just as the name implies,
is the brightness of a screen.
If you are not outdoorsman
like carrying around twenty four hours a day for field survival
It is enough for you with 300-400 nit indoor
for our doors is more than sufficient with 400 nit.
So here we recommend 300-400 nit as the mainstream models on the market fit in this box.
But 400 nit would be the first choice,
so you would make it work in different scenario
Anything below 300 nit should be considered carefully,
unless you are not gonna take it out your room at all,
1000 :1 contrast ratio.
This refers to the brightness values,
comparison between the brightest white and the darkest black on the screen.
The greater the contrast,
the deeper the white and black contrast will be.
So you will see more clear image with vivid colors,
generally, 800 to 1000 would be prevailing,
if under 400, you will notice the difference.
HDR, this is quite familiar,
AKA, high dynamic range for that screen luminance is to reach up 500.
Contract ratio runs to 1000:1 or more.
Also local dimming and dimming and 10bit color depth.
HDR, 400 is 400 nit.
100%sRGB, 8bit, this is entry-level, well
Better than nothing,
HDR 500 and HDR 1000, the most common ones,
at least HDR 500.
You can tell the obvious differences.
HDR con10t is perhaps the most significant bottleneck for HDR,
without HDR con10t support, it doesn't matter how good a screen is.
LBL, hardware low blue light
According to the medical research.
435 nm wavelengths, blue light does more damage to human eyes.
Here hardware, anti blue light turns this into 465 nm.
In this screen design,
so it will cause less harm to the eyes and not affect color display.
While software and high blue light directly reduce blue light,
display from which screen turn yellow over time.
Delta E is the parameter of color accuracy.
The higher the scores,
the more distorted the calories.
Between 1.6 and 3.2,
basically, human eyes can't tell the color difference.
DCI-P3, 100% Adobe and 100% sRGB all have the chances to fill in this box.
Through the professional color correction,
while from 3.2 to 6.5, we can't see much of difference.
In this range
there is a mainstream LCD on the market,
about 6.5 to13.
You will already tell the color difference,
but the color tone is still the same.
Currently, some lower-end screens on the market fall into this category.
If the score goes up to 13,
you can't even tell what color it is.
Basically it will not be on the consumer laptops,
The color depths on the image is mirror in bits.
The number of bits indicates how many colours are available for each pixel,
the higher the color depths, the more colors an image can display.
An 8-bit panel works with RGB using 256 levels per channel
while 10-bit jumps up to 1,024 levels per channel.
This means a 10-bit image can display up to 1.07 billion colors,
while an 8-bit photo can only display 16.7 million.
Actually is enough for 8 bits,
but 10 bit is better if possible.
DC dimming it refers to adjusting screen brightness
Now we have DC dimming and PWM dimming.
DC dimming essentially adjusts the power consumption to control screen brightness
while PWM dimming adjusts the brightness through screen on and off duration
If the conversion frequency is too low
get shot by a high-speed camera is called flicker.
DC dimming is more eye-friendly compared to PWM dimming in the low frequency case.
25ms response time is the time it takes your monitor to shift from from black to white to black again
in terms of milliseconds.
The shorter, the better,
in all cases,
lower response times are better
because they cut down on image issues like blurring or “ghosting"
Currently, an ultra-slim notebook takes 25-30ms,
while a gaming monitor goes after single-digit ms or 1 ms.
LTPS, low temperature poly-silicon.
For now, LCD technology includes aSi, LTPS, and Oxide.
For aSi, it’s relatively cheap on cost and higher power consumption
On the contrary, LTPS has got less power consumption and relatively high cost.
As the electronic mobility moves faster,
which is more suitable to be made as high end screen,
with high resolution and high refresh rate.
Oxide comes in between,
for users, what you can feel is battery life,
it last longer without GPS.
To sum up,
I sorted it out based on the experience and use value:
resolution ratio, recommend PPI, 220 above more than 2.5 k.
Color gamut: 100% sRGB
Brightness: 300 Nit above
refreshe rate: more than 60Hz, preference for 90Hz above.
DC dimming and hardware low blue light
for others, if you have higher demand for color
ithen recommend wider color gamut, even color calibration.
For gamers,
00Hz above would be a better option.
that's for today,
hope we enjoy the video.
See you in the next one.