Kobo aura h2o display on aura hd?

gezzer · 12-12-2016, 08:38 PM

hello, i'm new to this forum and i'm in the dawn of selling two kindle paperwhites to buy a kobo aura hd, just to be able to use android for comic reading purposes.

i read somewhere that the h2o screen is better in terms of frontlight, which give higher contrast when reading in the dark.

i just thought that by one slim chance, aura h2o and aura hd displays might be interchangeable, and checked it on alie*press. the part numbers are different by one letter, and their outer appearence are exactly the same as i saw so far.

Here is the pictures for Aura HD display part:

And the Aura H2O display:
[Image violates Posting Guidelines for size - MODERATOR]

[Image violates Posting Guidelines for size - MODERATOR]

what do you say? i currently don't have the money to invest in this maybe someone who owns both and frequently dissassembles them might be willing to try.

And correct me if there isn't really much difference between aura h2o and aura hd screens, even in terms of frontlight.

Markismus · 12-18-2016, 08:21 AM

The AuraHD screen is a Pearl Eink screen, whereas the AuraH2O screen is a Carta Eink screen. The Carta screens can be driven by a different protocol REGL. The drivers are different.

So you'll have to hack the Kobo system to include the drivers needed. Not impossible, but you'll be pioneering it.

Personally, I would love to know more about the screen interface: How it works, whether you can use converters between different types of pinouts. With all older ereaders becoming obsolete, it would be a nice thing to play with: Recycling!

gezzer · 12-18-2016, 08:29 AM

thanks for the reply!

i just thought since the sockets seem the same, pinouts might be the same, and further same the protocols. it's too bad if you say so.

porting the drivers are just too much hassle for a plug and play small enhancement hack.

but yes, you can always convert a protocol to another with different pinouts, using custom interface and level converting, protocol translator circuitry which is composed of fet transistors zeners resistors and a rather powerful mcu. but it's just overkill, not worth the recycle.

Dr. Drib · 02-22-2017, 10:32 AM

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12-12-2016, 08:38 PM	#1
gezzer Member Posts: 22 Karma: 1582 Join Date: Dec 2016 Device: nook simple touch, paperwhite 2, paperwhite 3, kobo aura hd	Kobo aura h2o display on aura hd? hello, i'm new to this forum and i'm in the dawn of selling two kindle paperwhites to buy a kobo aura hd, just to be able to use android for comic reading purposes. i read somewhere that the h2o screen is better in terms of frontlight, which give higher contrast when reading in the dark. i just thought that by one slim chance, aura h2o and aura hd displays might be interchangeable, and checked it on aliepress. the part numbers are different by one letter, and their outer appearence are exactly the same as i saw so far. Here is the pictures for Aura HD display part: And the Aura H2O display: [Image violates Posting Guidelines for size - MODERATOR] [Image violates Posting Guidelines for size - MODERATOR] what do you say? i currently don't have the money to invest in this maybe someone who owns both and frequently dissassembles them might be willing to try. And correct me if there isn't really much difference between aura h2o and aura hd screens, even in terms of frontlight. Last edited by Dr. Drib; 02-22-2017 at 10:32 AM.*

12-18-2016, 08:29 AM	#3
gezzer Member Posts: 22 Karma: 1582 Join Date: Dec 2016 Device: nook simple touch, paperwhite 2, paperwhite 3, kobo aura hd	thanks for the reply! i just thought since the sockets seem the same, pinouts might be the same, and further same the protocols. it's too bad if you say so. porting the drivers are just too much hassle for a plug and play small enhancement hack. but yes, you can always convert a protocol to another with different pinouts, using custom interface and level converting, protocol translator circuitry which is composed of fet transistors zeners resistors and a rather powerful mcu. but it's just overkill, not worth the recycle. Last edited by gezzer; 12-18-2016 at 08:33 AM.

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12-18-2016, 08:21 AM	#2
Markismus Guru Posts: 895 Karma: 149877 Join Date: Jul 2013 Location: Netherlands Device: Cracked HiSenseA5ProCC, Cracked OnyxNotePro, Note5, Kobo Glo, Aura	The AuraHD screen is a Pearl Eink screen, whereas the AuraH2O screen is a Carta Eink screen. The Carta screens can be driven by a different protocol REGL. The drivers are different. So you'll have to hack the Kobo system to include the drivers needed. Not impossible, but you'll be pioneering it. Personally, I would love to know more about the screen interface: How it works, whether you can use converters between different types of pinouts. With all older ereaders becoming obsolete, it would be a nice thing to play with: Recycling!

02-22-2017, 10:32 AM	#4
Dr. Drib Grand Sorcerer Posts: 44,736 Karma: 55645321 Join Date: Jan 2007 Location: Peru Device: Kindle: Oasis 3, Voyage WiFi; Kobo: Libra 2, Aura One	Moderator Notice Please take a few moments to read our Posting Guidelines, in particular the part about the maximum image size allowed (600x600 pixels). Images that violate those guidelines may be deleted. It is every member's responsibility to read our Posting Guidelines and follow them. Thanks.

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