Contents - Raspberry PI Community Projects

Nokia N8 has AMOLED 360x640 pixels DSI LCD. Replacement screen is about ~$35,
another ~$25 for Multitouch Synaptics T1021A touchscreen (I2C + interrupt IO, no docs/
drivers).
The schematics for apples iPhone 3gs (http://www.mikrocontroller.net/attachment/
127135/iPhone_3Gs_schematics.pdf) and 4g (http://jumbofiles.com/57ycs8zez45j/
iPhone_4G_schematic.pdf.html) suggest they speak DSI, thus they can probably be
connected directly. The older iPhones use a "Mobile Pixel Link" connection from
National Semiconductor. The 3GS panel (480×320) goes as low as US $14.88
(http://www.aliexpress.com/product-fm/377987722-Replacement-LCD-Glass-Screen-
Display-for-iPhone-3GS-wholesalers.html) , while the 4G one (960×640, possibly the LG
LH350WS1-SD01 (http://www.displayalliance.com/research/lh350ws1-sd01.html) , with
specifications (http://www.panelook.com/modeldetail_parameter.php?id=12086) ) can be
had for US $17.99 (http://www.aliexpress.com/product-fm/453840894-Replacement-
LCD-Glass-Screen-Display-for-iPhone-4G-wholesalers.html) or as low as US $14.28
(http://www.ebay.com/itm/Repair-LCD-Glass-Screen-Display-Iphone-4G-4th-4-GEN-
/110821471601) . The connectors used might be an issue, but this connector
(http://www.airaccent.com/lcd-screen-fpc-connector-replacement-for-iphone-4gp-39877.html)
might fit. Additional circuitry might be necessary to provide the display
with required 1.8V and 5.7V for operation, and an even higher voltage for the backlight.
Other panels with MIPI DSI: www.panelook.com (http://www.panelook.com/
modelsearch.php?pagesize=50&order=panel_id&panel_type=&product_composition=&brand_family=&pan
The Raspberry Pi provides one clock lane and two data lanes on the S2 connector, as can
be read from the schematics (http://www.raspberrypi.org/wp-content/uploads/2012/04/
Raspberry-Pi-Schematics-R1.0.pdf) . It is currently unknown whether this is enough to
drive the iPhone 4G screen, as that screen seems be driven with three data lanes in its
original application.
Potential LVDS interfacing chips:
TC358764/5 Display Bridge (MIPI® DSI to LVDS) (http://www.toshibacomponents.com/mobile/data/Toshiba_TC358764_65XBGA.pdf)
DVI receiver TFP401A, TFP403, or TFP501 + LVDS transmitter SN75LVDS83B or
SN65LVDS93A (http://e2e.ti.com/cfs-filesystemfile.ashx/__key/CommunityServer-
Discussions-Components-Files/130/3252.DVI_3B00_HDMI_2D00_to_2D00_LVDS-
Bridge-Application-Note.doc) (Mentioned earlier fit-VGA is build around TFP401A,
probably many more "active" DVI2VGA cables are build the same way)
I2C/SPI ADC can be used to interface 4 pin resistive Touch Screens, For example
STMPE812A (http://www.st.com/internet/com/TECHNICAL_RESOURCES/
TECHNICAL_LITERATURE/DATASHEET/CD00291197.pdf) . Texas Instruments has
a solution for 4 or 8 wire touchscreens (http://www.ti.com/sc/docs/psheets/abstract/apps/
slaa384a.htm) using their rather cheap MSP4309.