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Topics, questions, and discussion around Displaytech and HDP Power products

李翔宇 replied 16 hours ago
Discussion
TFT Displays

INT043BTFT flicker when refreshing text, only red is not flicker

When updating temperature data, display flicker
When updating temperature data, display flicker

In the video, you can see that the green numbers are constantly refreshing, so visually you will feel that they are being erased and redrawn, causing flickering.

But when the color is only set to red, the number will not flash, and other colors will flash.

 

Attempts to adjust the PWM frequency and duty cycle have not taken effect.

The data refresh from 10ms once to 5000ms once did not improve.

 

Geoffrey replied 6 days ago
Discussion
TFT Displays

VCOM max current draw and LED- wiring of the display DT070BTFT-PTS1

This is my first time wiring a TFT display and I have some questions about the display DT070BTFT-PTS1 :

  • What is the maximum current draw from the display VCOM input supply ?
  • Should LED- (pins 31 and 32) be connected to GND ?
  • Should we provide external resistor to limit the current of the backlight LEDs ?
  • Is it OK if my PSU 9.6V is shared between AVDD supply and VL (= 'LED+' - 'LED-')

Thanks in advance,

Discussion
DT070DTFT

Do LED- and GND have to be connected?

The title says itself. 


I have a pair of this display: DT070DTFT-IPS-PTS Displaytech | Mouser Germany

According to the datasheet, in order to make the display work, I have to connect these pins:

  • VDD <- 3.3V
  • LED+ <- 9.6V (voltage source with capability of 140mA)
  • GND

Do I have to connect LED- to GND?

And basically, am I missing any connections?


Thank you very much in advance.

Kind regards,

Thai.

Nicole updated 9 days ago
Discussion
TFT Displays

DT035BTFT-PTS2 touch I2C interface

Looking through the datasheet for the DT035BTFT-PTS2, the drawing on page 4 makes it look as though the capacitive touch I2C interface is 1.8V logic.  However, the touch controller (FT5x46) datasheet says the touch controller operating voltage is up to 3.6V.  Can the capacitive touch I2C interface on the DT035BTFT-PTS2 therefore be run at 3.3V so I can avoid a level translator?