Thanks for reply !
So ... using as hardware - 16F628A @ 4 MHz and LED display KW4-311AVA, I built one termometer, using DS18B20, with different variants of software (presented in this topic). All my variants have this issue - display flickering, more or less, but present.
The hardware from the link posted above use same hardware, 16F628 @ 4 Mhz and same display. BUT ... no flickering ! The display look sharp and bright.
So ... I intend to build an termometer, using same hardware, but flicker-free ! And, despite searching this forum, I could not find any convenient version to apply.
This is why I asked for help ! Thanks in advance !