Drive a sharp LCD by TOSHIBA chip

[wiwiwi]

Help Please,
Now I have a sharp LCD (model: LS055T3SX05) and a THOSHIBA chip (TC358870XBG).
But first of all, I want to light up the LCD. From what I read there are three pins (LED+, LED-, LED_PWM) related to backlight.
I apply 5v to LED+ with 0v to LED-, for LED_PWM I am using the 3.3v blue pill (arduino) to produce pulse. However, Backlight is still not working......
anyone can help? appreciated!!!!!
 

[wiwiwi]

help pls!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[oPossum]

Backlight is 6S2P so it's not going to run on 5V.

[wiwiwi]

But weather this LCD need to be driven by code (like power on sequence) with a MCU or direct voltage can light up the LCD?
I found there is a information say "POWER ON sequence, power off sequence, video mode sequence" in the lcd document, so that I wonder this lcd need MCU to drive.

[ealex]

it would help us if you attach a datasheet fro the display - I've tried looking for it and it does not seem readily available.

the backlight has 6 leds in series and no back-light driver
you'll need to supply at least 18V, current limited to ~ 20mA for start

about how to initialize the display - no clue without a data sheet

[wiwiwi]

Of course, here we go.

I am quite confused weather the mipi lcd can power on backlight by supplying voltage directly without any code or power sequence?
thanks, bro.