TFT_320QVT 9341 lcd shutting down after about 20 hours

Other Hardware Displays
1

hi.
i am using a TFT_320QVT LCD to check some sensors(such as dht11, pms7003 ...) data with arduino board.

4 sensors and esp wifi module is connected with arduino and lcd power is also from arduino 3.3v.

yesterday i left our lab with it working.
and only LCD is down today. sensors are working because sensors data were still uploading to thingspeak.

so i doubt brightness is strong. but i can not control LCD brightness because it is not CPLD-based LCD.
how can i fix that. and someone has same problem?
waiting anyones help.

2

this problem may be cause power consumption.
it works about 20 hours if battery filled full.
and it works on 30 minute if battery not filled.
need to find a way to reduce power consumption.

3

is there possible way to reduce power consumption?

if LCD's brightness is reduced, power also reduce?

is there way to reduce brightness on not CPLD based board?..

.........plz help anybody

4

Have a NO reed micro relay powered by pin. Use sketch to engergize pin, therefore allowing VCC to flow to lcd.

Now add a button or timer to turn on the LCD only when you need it, huge power savings..