Backlights in kobo 905C

lucaverna · 11-01-2020, 10:41 AM

go other nigth i was reading in my kobo 905C (kodo light TouchLC) and i decided that i will disassembly it and instal a backlight.

I disassemble the Kobo today, and what has my surprise when i saw that it already has the backlight led installed!

Did anyone knows how to activate this backlight?

If i need to change anything in the board, or if i install the firmware from the 905A it will work?

The motherboard code is 37nb-e60610+4d1 exactly as the one in this annonce:
EBAY ANNONCE

JSWolf · 11-01-2020, 11:41 AM

You have a Kobo Touch and it does not have a front light.

DNSB · 11-01-2020, 11:51 AM

Very probably what you are looking at are the IR LEDs used for the touch screen. The Touch has never had an illuminated screen in any of it's 3 variants. There is also the point that a backlight would not work since the eInk screen is opaque.

Quoth · 11-02-2020, 12:01 PM

You can't easily add built in light to a Kobo Touch, or indeed any eink based reader as the rear of the screen is opaque. The lit ones use a special light pipe layer under the front of the screen. I'd not say it's impossible to add such a thing to a IR touch screen, though unlikely. Pretty much impossible with capacitive or resistive touch. Probably possible on a screen that only uses a Wacom stylus as it doesn't actually need to touch the actual screen and has a built in pressure sensor. A Wacom pen/stylus is actually powered by the device.

11-01-2020, 10:41 AM	#1
lucaverna Junior Member Posts: 1 Karma: 10 Join Date: Nov 2020 Device: Kodo 905c	Backlights in kobo 905C go other nigth i was reading in my kobo 905C (kodo light TouchLC) and i decided that i will disassembly it and instal a backlight. I disassemble the Kobo today, and what has my surprise when i saw that it already has the backlight led installed! Did anyone knows how to activate this backlight? If i need to change anything in the board, or if i install the firmware from the 905A it will work? The motherboard code is 37nb-e60610+4d1 exactly as the one in this annonce: EBAY ANNONCE

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11-01-2020, 11:41 AM	#2
JSWolf Resident Curmudgeon Posts: 79,058 Karma: 144284144 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	You have a Kobo Touch and it does not have a front light.

11-01-2020, 11:51 AM	#3
DNSB Bibliophagist Posts: 44,705 Karma: 168431851 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Very probably what you are looking at are the IR LEDs used for the touch screen. The Touch has never had an illuminated screen in any of it's 3 variants. There is also the point that a backlight would not work since the eInk screen is opaque.

11-02-2020, 12:01 PM	#4
Quoth Still reading Posts: 13,679 Karma: 103503695 Join Date: Jun 2017 Location: Ireland Device: All 4 Kinds: epub eink, Kindle, android eink, NxtPaper	You can't easily add built in light to a Kobo Touch, or indeed any eink based reader as the rear of the screen is opaque. The lit ones use a special light pipe layer under the front of the screen. I'd not say it's impossible to add such a thing to a IR touch screen, though unlikely. Pretty much impossible with capacitive or resistive touch. Probably possible on a screen that only uses a Wacom stylus as it doesn't actually need to touch the actual screen and has a built in pressure sensor. A Wacom pen/stylus is actually powered by the device.

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