epaper_display
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epaper_display [2011/02/21 03:42] steve_m [Display controller] |
epaper_display [2011/02/24 15:03] steve_m [Driving the Motorola F3 e-paper display] sustain->retain |
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| The Motorola F3/MOTOFONE was the first (and still is the only?) mobile phone with an e-paper display. Although this is not a pixel-based display, like found in eBook-readers (e.g. the Amazon Kindle or the B&N nook), it is still quite nice for experimenting with low power microcontroller projects. | The Motorola F3/MOTOFONE was the first (and still is the only?) mobile phone with an e-paper display. Although this is not a pixel-based display, like found in eBook-readers (e.g. the Amazon Kindle or the B&N nook), it is still quite nice for experimenting with low power microcontroller projects. | ||
| - | E-paper/bistable displays have the ability to sustain the display content even without the supply of power, so initial idea I had was to build something like a clock, only powering the display when updating it every minute. | + | E-paper/bistable displays have the ability to retain the display content even without the supply of power, so the initial idea I had was to build something like a clock, only powering the display when updating it every minute. |
| ===== The display===== | ===== The display===== | ||
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| * The timer was actually sped up by the factor of 10 for demonstration purposes, so 1 minute on the clock is actually 6 seconds in the video. | * The timer was actually sped up by the factor of 10 for demonstration purposes, so 1 minute on the clock is actually 6 seconds in the video. | ||
| * Completely powering down the display also has its disadvantages. As you can see, the display needs to be initialized every time you power it up again (thus the flickering), which isn't needed when just disabling the 32KHz clock. | * Completely powering down the display also has its disadvantages. As you can see, the display needs to be initialized every time you power it up again (thus the flickering), which isn't needed when just disabling the 32KHz clock. | ||
| + | * The second row (showing 000000) is just a counter, counting the total hours, and is intended for a runtime test with a goldcap or CR2032 battery. | ||
| ===== Sourcecode ===== | ===== Sourcecode ===== | ||
| The sourcecode can be found on github: | The sourcecode can be found on github: | ||
epaper_display.txt ยท Last modified: 2011/07/27 23:48 by steve_m
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