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Thread: hacking a printer's LCD

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    Variable Bitrate natedawgg's Avatar
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    hacking a printer's LCD

    so this is just a pie-in-the-sky idea that i had about hacking a printer's LCD screen to use as an auxiliary display to my main 7" lilliput. This could be used to display song info, or OBDII info, clock, anything really.

    I recently had a printer that just decided it didn't want to print anymore. when you could get it to print it all worked just fine, but i was tired of fighting with it and just bought a new one. now i have this old one with a nice 2" or so LCD display that works just fine. i was wondering if anybody has done this before or has any idea of where to start to get this LCD working with a regular PC?
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    Are there any numbers or parts identification on it? Maybe you can find out what type of LCD it is and what, if any, hardware it required to drive it.
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    Fusion Brain Creator 2k1Toaster's Avatar
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    Quote Originally Posted by natedawgg View Post
    so this is just a pie-in-the-sky idea that i had about hacking a printer's LCD screen to use as an auxiliary display to my main 7" lilliput. This could be used to display song info, or OBDII info, clock, anything really.

    I recently had a printer that just decided it didn't want to print anymore. when you could get it to print it all worked just fine, but i was tired of fighting with it and just bought a new one. now i have this old one with a nice 2" or so LCD display that works just fine. i was wondering if anybody has done this before or has any idea of where to start to get this LCD working with a regular PC?
    You need the PC to interface with a microcontroller, the microcontroller to an lcd driver & backlight, and those to the LCD.

    There are no universal drivers, usually the LCD "frame" is the LCD + driver. But now you have a mystery chip. Aside from ripping a donor apart and looking at model #'s and stamps, the only way is to find someone who has already done that. I doubt the big printer company will put the manufacturer and display driver chip information in a manual anywhere... And to top it off, many LCD with bundled drivers come in different formats. For instance the Nokia 6610 displays that I have been working with have 3 different and completely incompatible chipsets to drive the same display. Different initiation routines, different message format, different commands, different sequencing, you name it.

    Not worth the hassle to salvage a screen unless you know what it is.

    A 2" 12bit colour screen can be had for $8. Then you know what screen and what driver you are getting. So is $8 worth all the hassle?
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    Variable Bitrate natedawgg's Avatar
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    Quote Originally Posted by 2k1Toaster View Post
    You need the PC to interface with a microcontroller, the microcontroller to an lcd driver & backlight, and those to the LCD.

    There are no universal drivers, usually the LCD "frame" is the LCD + driver. But now you have a mystery chip. Aside from ripping a donor apart and looking at model #'s and stamps, the only way is to find someone who has already done that. I doubt the big printer company will put the manufacturer and display driver chip information in a manual anywhere... And to top it off, many LCD with bundled drivers come in different formats. For instance the Nokia 6610 displays that I have been working with have 3 different and completely incompatible chipsets to drive the same display. Different initiation routines, different message format, different commands, different sequencing, you name it.

    Not worth the hassle to salvage a screen unless you know what it is.

    A 2" 12bit colour screen can be had for $8. Then you know what screen and what driver you are getting. So is $8 worth all the hassle?
    yeah you are probably right. i just thought it would be a neat project, but it seems like waaay to much work for something not that entirely useful. by the way where do you pick up a 2" screen like that anyway?
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