Light bulb apparatus

1. A light bulb apparatus, comprising:

a light bulb shell;

a bulb head;

a flexible filament for emitting light, the flexible filament has a first terminal and a second terminal;

a central support for providing a first electrode and a second electrode, the first electrode of the central support is electrically connected to the first terminal of the flexible filament, and the second electrode is electrically connected to the second terminal of the flexible filament;

an expanding structure mechanically coupled to the central support, the expanding structure includes a plurality of holding portions for holding the flexible filament, and

a driver module for electrically connected to the bulb head and the central support for providing electrical power to the first electrode and the second electrode of the central support, wherein the expanding structure comprises a plurality of support boards, each of the support boards provides the holding portions to hold the flexible filament, wherein the expanding structure comprises two bending strips symmetrically arranged with respect to a central axis of the central support, and each of the bending strips has a plurality of concave portions as the holding portions to hold the flexible filament.

2. The light bulb apparatus of claim 1 , wherein the concave portions are substantially U-shaped, C-shaped, or G-shaped.

3. The light bulb apparatus of claim 1 , wherein the concave portions are substantially U-shaped, C-shaped, or G-shaped.

4. The light bulb apparatus of claim 1 , wherein the expanding structure comprises a plurality of support rods arranged along a central axis of the central support, each of the support rods has a first end mechanically coupled to the central support and a second end extending outward from the central support to hold the flexible filament.

5. The light bulb apparatus of claim 4 , wherein the second ends of the support rods are substantially U-shaped, C-shaped, or G-shaped.

6. The light bulb apparatus of claim 1 , wherein the expanding structure comprises a block-shaped pillar having a concave slot, the concave slot is spiral on a surface of the block-shaped pillar for holding the flexible filament.

7. The light bulb apparatus of claim 6 , wherein the expanding structure is made of metal, ceramic, glass, or plastic material.

8. The light bulb apparatus of claim 6 , wherein the block-shaped pillar is hollow inside.

9. The light bulb apparatus of claim 6 , wherein the block-shaped pillar is solid inside.

10. The light bulb apparatus of claim 1 , further comprising another flexible filament emitting another light to be mixed with the light emitted by the flexible filament.

11. The light bulb apparatus of claim 1 , wherein the expanding structure is made of metal, ceramic, glass, or plastic material.

12. The light bulb apparatus of claim 1 , wherein the concave portions are substantially U-shaped, C-shaped, or G-shaped.

13. The light bulb apparatus of claim 1 , wherein the central support and the expanding structure are made of a same material and are integrally formed.

14. The light bulb apparatus of claim 1 , wherein the light bulb apparatus comprises at least two flexible filaments connected in series or in parallel.

15. The light bulb apparatus of claim 14 , wherein the at least two flexible filaments are capable of emitting light with different colors or different color temperatures.

16. The light bulb apparatus of claim 1 , wherein the holding portions includes a blocking structure for preventing the flexible filament from falling out of the holding portions.

17. The light bulb apparatus of claim 16 , wherein the holding portions are G-shaped for preventing the flexible filament from falling out of the holding portions.

18. The light bulb apparatus of claim 1 , wherein the expanding structure is mechanically coupled to the first electrode and the second electrode.