Led filament and light bulb using the same

An LED filament bulb, comprising:

• a bulb shell;
• a lamp base connected to the bulb shell;
• a stem disposed in the bulb shell;
• two conductive brackets disposed in the bulb shell;
• a driving circuit disposed in the lamp base and electrically connected to the two conductive brackets;
• and
• at least one flexible LED filament being bent in a space curved shape in the bulb shell and electrically connected to the two conductive brackets, the flexible LED filament comprising,
• a base layer;
• two electrodes disposed on the base layer and electrically connected to the two conductive brackets respectively;
• a plurality of first LED chips and at least one current-limiting resistor disposed on the base layer and connected in series to form a first current branch, two ends of the first current branch connected to the two electrodes respectively;
• a plurality of second LED chips disposed on the base layer and connected in series to form a second current branch, two ends of the second current branch connected to the two electrodes respectively, wherein the first current branch is connected in parallel with the second current branch;
• and
• a covering layer covering the plurality of first LED chips, the at least one current-limiting resistor, the plurality of second LED chips and a part of each two electrodes.