Not all LEDs requier a drive circuit because of the current they require.
It also depends on the circuit in the first place (if the component that is driving the LED can supply fnough current then a Drive Circuit is not required).
White LEDs have high voltage drop – the RGB LEDs connected in series to get white color
3.3v logic power supply or 3.7v battery powered devices cannot drive white LEDs
the LED driver usually include voltage booster and current control to keep the LED brightness constant when the battery voltage drops