Electronics > Projects, Designs, and Technical Stuff
KOPIN KD040922K-K micro sized LCD display
Fraser:
The controller for your display looks to be shown on this page from the KOPIN archives. Only one controller is shown for an LCD panel. It is an SSD1502.
https://web.archive.org/web/20120723054453/http://www.kopin.com/vga/
https://www.electronicsdatasheets.com/manufacturers/kopin-corp/parts/kcdvdcfaa#datasheet
https://www.electronicsdatasheets.com/manufacturers/kopin-corp/parts/kcda900qa#datasheet
More data sheets....
https://www.electronicsdatasheets.com/manufacturers/kopin-corp/parts/
Fraser
Fraser:
In case you have not noticed, the part number details the total number of pixels .... H x V x 3 (3 pixels for colour)
So a QVGA is 320 x 240 x 3 = 230K pixels and so the part number includes “230K”.
And VGA is 640 x 480 x 3 = 922K and that is your LCD park number ID “922K” :-+
Fraser
Fraser:
I just found the confirmation of the driver on a forum. Your MyVue glasses should contain the SSD1502 driver that is capable of driving two LCD panels.
“ I’ve the opportunity to examine these glasses currently, and the resolution is indeed 2*3*640*480, using two Kopin CyberDisplay VGA modules. The display driver chip (SSD1502) ”
Fraser
Fraser:
OK, my mission is accomplished... here is the full datasheet for the SSD1502 that you need for driving your LCD panel.
https://opendevices.ru/wp-content/uploads/2011/06/SSD1502.pdf
Fraser
kyndal:
WOW thanks Fraser. that's alot of good information thanks alot.
now i have some material to work with
i do have the pendent for the LCD's but no joy is escaping from it as of now.
i believe it got fried with an over voltage on the usb port. the power adapter is outputting a nice 9volts under load
how far down the line is unknown.
(thou shall measure voltages..) I'm finding nice 1.8v and 3.3v rails based on the TW9910 datasheet atleast will do more digging today
i still dont have the datasheet for the LCD part. but i have (decided) for now, that this pinout makes sense (from KCD-VDCF-AA datasheet which could be this device too)
and based on board layout
1 VCOM Pixel common electrode
2 RSV Reserved output
3 VIDR Red video input
4 VIDG Green video input
5 VIDB Blue video input
6 HCK1 Horizontal clock
7 HCK2 Horizontal clock
8 HST Horizontal start
9 RGT Left-to-right scan
10 DWN Top-to-bottom scan
11 VCK Vertical clock
12 VST Vertical start pulse
13 EN Row enable
14 SLEEP* Sleep mode
15 VDD Supply = +9.5V
16 VCC Interface supply = +3.3V
17 VSS Supply = 0V
18 TOUT1 Test output
19 TOUT2 Test output
20 VCOM Pixel common electrode
it looks like quite the exercise to drive the LCD "RAW" with the high and low going analog signals, "scan lines" etc.
just maby i can resurrect this board.
Rune Kyndal
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