I'm planning to make a custom LCD made. The LCD has 128 segments. Now, in order to drive it, I have two options :

  • Use 4 COM + 32 pins
  • Use 8 COM + 16 pins

The MCU which I'm looking at (STM8L052R8) has support for 4 COM x 28 (112) or 8 COM x 24 (192). Since I have 128 segments, If I choose this MCU, then I'll need to go for 8COM config (8x16 = 128).

Many vendors have flatly told me that the viewing would not be good, and given me advice that 4COM would be better to view. Since I've little idea what they mean, I need better understanding of why this is so. And how bad would this viewing angle be, apart from other issues which I dont know of if 8 COM is used.

My expectation is its okay if the LCD has to be viewed in a 45 degree range.

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    \$\begingroup\$ @tlfong01 It is clearly about segmented LCD. \$\endgroup\$ Oct 20, 2020 at 8:51
  • 1
    \$\begingroup\$ Guys it's custom lcd glass display, like those in medical handheld devices. Tf display without Backlight. \$\endgroup\$
    – Ouroboros
    Oct 20, 2020 at 11:19
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    \$\begingroup\$ And there would be 7 segment display and a few icons. \$\endgroup\$
    – Ouroboros
    Oct 20, 2020 at 11:20
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    \$\begingroup\$ @tlfong01 you're not helping. I am not sure if you have any questions.. \$\endgroup\$
    – Ouroboros
    Oct 21, 2020 at 5:20
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    \$\begingroup\$ @tlfong01 No need for apologies mate. Just let me know what issues I might encounter, when going for a custom display with 8 COM pins. \$\endgroup\$
    – Ouroboros
    Oct 22, 2020 at 8:02


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