A 1USD 11W led bulb circuit and parts analysis
I give it a shot, and I try to reverse engineering your LED driver circuit.  

First what I did was to draw components on the PCB photo.  



And now "without any problems" I could draw the circuit diagram. 







simulate this circuit &ndash; Schematic created using CircuitLab

As you can see we have modified version of a singe BJT blocking oscillator (joule thief). 

http://mmcircuit.com/understand-rcc-smps/

https://skootsone.yolasite.com/led-en.php

http://www.powerelectronictips.com/teardown-60-w-equivalent-led-bulbs/

Also can you post the diodes marking? So we will be able to tell exactly what type of a diode was used.