It looks like an LED backlight with two brightness levels. One transistor will turn on the LED through R9 (and R2) giving a low current. The other transistor would turn on the LED with the current limited only by R2 so it will be a lot brighter.
It looks like an LED backlight with two brightness levels. One transistor will turn on the LED through R9 (and R2) giving a low current. The other transistor would turn on the LED with the current limited only by R2 so it will be a lot brighter.
With two transistors you get the choice of no LED, dim LED & bright LED. If you always want the LED on, but dim, then you could connect one end of R9 to ground and leave off the second transistor, as you say.