Difference between revisions of "BrailleNote Tieman Display"

From Hackstrich
(Few other notes from tonight.)
 
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The Tieman braille display was the first model used in the BrailleNote notetakers.  This display has reliability issues, and I'm reverse-engineering it to try to fix mine which is broken.
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* Display uses 1 "backplane board" per 8 cells
 
* Display uses 1 "backplane board" per 8 cells
 
* Each backplane board has 8 cell connectors, 2 inter-board connectors (left and right), and one Supertex HV507PG chip
 
* Each backplane board has 8 cell connectors, 2 inter-board connectors (left and right), and one Supertex HV507PG chip
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* Pinout of display connector (from edge of board opposite SMD cap)
 
* Pinout of display connector (from edge of board opposite SMD cap)
 
** Left Side (male)
 
** Left Side (male)
*** Red - HV
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*** Red - HV (~250VDC)
 
*** Grey - Ground
 
*** Grey - Ground
 
*** Grey - Data B
 
*** Grey - Data B
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*** Green - CLK
 
*** Green - CLK
 
*** Grey - !LatchEnable
 
*** Grey - !LatchEnable
*** Grey - LV
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*** Grey - LV (~5VDC)
 
*** Grey - Direction (Low = A in, B out)
 
*** Grey - Direction (Low = A in, B out)
 
** Right Side (female)
 
** Right Side (female)
*** Red - HV
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*** Red - HV (~250VDC)
 
*** Grey - Ground
 
*** Grey - Ground
 
*** Grey - Data A
 
*** Grey - Data A
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*** Green - CLK
 
*** Green - CLK
 
*** Grey - !LatchEnable
 
*** Grey - !LatchEnable
*** Grey - LV
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*** Grey - LV (~5VDC)
 
*** Grey - Direction (Low = A in, B out)
 
*** Grey - Direction (Low = A in, B out)
 
** Data pin is connected to straight-through pin on the last backplane board, which lets the BN read the bits back to ensure the display is working
 
** Data pin is connected to straight-through pin on the last backplane board, which lets the BN read the bits back to ensure the display is working
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Latest revision as of 12:03, 20 December 2011

The Tieman braille display was the first model used in the BrailleNote notetakers. This display has reliability issues, and I'm reverse-engineering it to try to fix mine which is broken.

  • Display uses 1 "backplane board" per 8 cells
  • Each backplane board has 8 cell connectors, 2 inter-board connectors (left and right), and one Supertex HV507PG chip
    • The HV507PG is a high-voltage 64 channel shift register
  • Pinout of display connector (from edge of board opposite SMD cap)
    • Left Side (male)
      • Red - HV (~250VDC)
      • Grey - Ground
      • Grey - Data B
      • Grey - Straight through to right side
      • Green - CLK
      • Grey - !LatchEnable
      • Grey - LV (~5VDC)
      • Grey - Direction (Low = A in, B out)
    • Right Side (female)
      • Red - HV (~250VDC)
      • Grey - Ground
      • Grey - Data A
      • Grey - Straight through to left side
      • Green - CLK
      • Grey - !LatchEnable
      • Grey - LV (~5VDC)
      • Grey - Direction (Low = A in, B out)
    • Data pin is connected to straight-through pin on the last backplane board, which lets the BN read the bits back to ensure the display is working