# Ka helu helu helu ʻo Pixel

### He aha ka nuʻa o nā pika

ʻO nā pika i kēlā me kēia ʻīniha (PPI) kahi ana o ka pixel density (hoʻonā) o nā hāmeʻa i nā ʻano like ʻole: ʻo ka maʻamau ka hōʻike ʻana i nā kamepiula, nā kiʻina kiʻi, a me nā kiʻi kiʻi paʻi kiʻi uila. ʻO ka PPI o kahi hōʻike kamepiula e pili ana i ka nui o ka hōʻike i nā ʻīniha a me ka helu o nā pika i nā ʻaoʻao papamoe a me nā kiko.

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### ʻO nā mea hou aʻe ma ka nui o ka pixel

Inā makemake ʻoe e helu i ka nui o ka pika o kāu pakuhi, pono ʻoe e ʻike: ka helu kiko a me ka pika kiko a me ka nui o ka maka diagonal. A laila e hoʻopili i kēia hana, a i ʻole hoʻohana i kā mākou calculator;)

$$d_p = \sqrt{w^2 + h^2}$$ $$PPI = \dfrac{d_p}{d_i} \ \$$ where

 $$w$$ ka hoʻonā ākea i nā pika $$h$$ ka hoʻonā kiʻekiʻe ma nā pika $$d_p$$ he hoʻonā diagonal i nā pika $$d_i$$ he diagonal ka nui i nā ʻīniha (ʻo kēia ka helu i hoʻolaha ʻia e like me ka nui o ka hōʻike)

Inā makemake ʻoe e ʻike hou aku, e nānā i kēia wikiō Linus Kōkua maikaʻi loa ma lalo nei.

### Hoʻonui i ka mōʻaukala o PPI (papa inoa o nā hāmeʻa)

#### Kelepona lawe lima

Inoa hāmeʻa Paʻa pika (PPI) Hōʻike hoʻonā Nui hōʻike (iniha) Hoʻokomo ʻia ka makahiki Loulou
Motorola Razr V3 128 176 x 220 2.2 2004
iPhone (first gen.) 128 320 x 480 3.5 2007
iPhone 4 326 960 x 640 3.5 2010
Samsung Galaxy S4 441 1080 x 1920 5 2013
HTC One 486 1080 x 1920 4.7 2013
LG G3 534 1140 x 2560 5.5 2014

#### Nā Papa

Inoa hāmeʻa Paʻa pika (PPI) Hōʻike hoʻonā Nui hōʻike (iniha) Hoʻokomo ʻia ka makahiki Loulou
iPad (first gen.) 132 1024 x 768 9.7 2010
iPad Air (also 3rd & 4th gen.) 264 2048 x 1536 9.7 2012
Samsung Galaxy Tab S 288 2560 x 1600 10.5 2014
iPad mini 2 326 2048 x 1536 7.9 2013
Samsung Galaxy Tab S 8.4 359 1600 x 2560 8.4 2014

#### Hōʻike kamepiula

Inoa hāmeʻa Paʻa pika (PPI) Hōʻike hoʻonā Nui hōʻike (iniha) Hoʻokomo ʻia ka makahiki Loulou
Commodore 1936 ARL 91 1024 x 768 14 1990
Dell E773C 96 1280 x 1024 17 1999
Dell U2412M 94 1920 x 1200 24 2011
Asus VE228DE 100 1920 x 1080 27 2011
Apple Thunderbolt Display 108 2560 x 1440 27 2011
Dell UP2414Q UltraSharp 4K 183 3840 x 2160 24 2014