Display Response difference
I am using 3.5 and 5 inch displays.
1. CrowPanel –ESP32 Terminal with 3.5 inch parallel 480x320 TFT capacitive touch RGB display(RGB by chip ILI9488)
2. CrowPanel 5.0"-HMI ESP32 Display 800x480 RGB TFT LCD Touch Screen Compatible with Arduino/LVGL/ PlatformIO/Micropython
I believe both are having the RGB interface but i am seeing faster display response in the 3.5 inch than the 5 inch display. Is there any difference in the interfaces?
Comments
Terminal RGB resolution is small, the memory is larger. So the Terminal reaction is going to be faster than the 5inch display.
ok. So, both display's interface is same, only the memory and resolution are the causes for this response timing difference? But I observed a clock frequency difference in the hal folder of the demo codes.
Here the frquency difference in the code
In the 5" inch display main program(demo code) cfg.freq_write = 15000000;
In the 3.5" inch display main program(demo code) cfg.freq_write = 80000000;
I tried to set the cfg.write value in the 5" inch display "cfg.write = 80000000" value as same as 3.5" inch display by expecting the faster display response. but display is not up as expected.
why this frequency differences?
@Winny @Sun
Could you please explain these freq_write differences which I mentioned in the previous comments?
Thanks in advance
Hi @Anand ,
Due to the hardware limitation of the 5-inch HMI screen, it works more stably at a frequency between 10-20 MHz. Exceeding this range may cause image distortion or display errors. If your hardware version is 3.0, you can try to increase cfg.freq_write, but not too high.