LTDC with Raw RGB LCD

b1aze · ‎2025-11-04

Hello stm community. I am working on a project involving STM32H7 series MCU with Raw LCD panel of 24 bits. Since the display has no IC i am using the internal LTDC component to drive the lcd. So i have some questions can i drive the lcd backlight with My STM board or i just give some voltage to it . Some lcd says it needs 16 v power supply. Is there any complications in this and is it possible to do this way drive a Raw parallel 24 bit lcd with stm32 without lcd IC. give some expert opinions.

mƎALLEm · ‎2025-11-07

Hello,

I suggest you to refer to the AN4861 "Introduction to LCD-TFT display controller (LTDC) on STM32 MCUs".

For the backlight that's another topic not related to the LTDC itself but to what was implemented in the LCD hardware. To my knowledge and in some LCDs there is a buck-boost DC-DC IC that boost a voltage example 3.3V to something > 12V. You need to check that in your LCD hardware.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

View solution in original post

mƎALLEm · ‎2025-11-07

Hello,

I suggest you to refer to the AN4861 "Introduction to LCD-TFT display controller (LTDC) on STM32 MCUs".

For the backlight that's another topic not related to the LTDC itself but to what was implemented in the LCD hardware. To my knowledge and in some LCDs there is a buck-boost DC-DC IC that boost a voltage example 3.3V to something > 12V. You need to check that in your LCD hardware.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.