This is a modification to convert an LED LCD TV to Full Array Local Dimming Backlight.
Parts list:
1W COB LED (98pcs)
LDR (98pcs)
MOSFET SI2300 or SI2306 (98pcs)
Resistor 4.7K (98pcs)
Resistor 1ohm (98pcs)
Circuit:
Repeat the same circuit 98 times
You can download the Gerber file of the PCB from PCBWay.com here:
https://www.pcbway.com/project/shareproject/Full_Array_Local_Dimming_TV_Backlight_6013e5cc.html
3D Printed Parts:
https://www.tinkercad.com/things/9z6gjJJRLsc-local-dimming-tv-backlight-part-12
https://www.tinkercad.com/things/eBGjOFxDnML-local-dimming-tc-backlight-part-22
Watch this Video for more Details:
NOTE-1: It is OK to use hot glue, because melting point of hot glue is 100C, These LEDs got only 32C when i leaved them running for a while (not even close to 100C), For higher power LEDs different story !
NOTE-2: Cheapest OLED TV in my country when i shared this video was $443, I bought this TV for $66 only and modification is so cheap if you buy the components from Aliexpress.
NOTE-3: I didn't used multiplexing for LEDs because multiplexing needs Microcontroller, this is why i wired every single LED separately.
NOTE-4: I said in the video "They Invented", because this method already used in some luxury TVs but they are so expensive, so this is a cheap hack !
