Abstract: A pump capable of dispensing both a large volume and a small volume of colorant comprises a large reciprocating positive displacement pump having a large reciprocating part, a large pump body and a large pump inlet-outlet opening, characterized in that: a small reciprocating part fixed to the large reciprocating part is disposed in the large pump body; a small pump body is disposed on a base of the large pump body, and provided with a small pump inlet-outlet opening; and the small reciprocating part, the small pump body and the small pump inlet-outlet opening constitute a small reciprocating positive displacement pump.

Abstract: A control valve includes a valve body and a valve element disposed in the valve body. The valve body is provided with a large pump inlet-outlet opening, a small pump inlet-outlet opening, a colorant bucket inlet-outlet opening and a colorant dispensing outlet. The valve core, which is provided with a passage, is rotated to allow connection of the large pump inlet-outlet opening and the small pump inlet-outlet opening with a colorant bucket or dispensing thereof, with at least three connecting structures being involved. The control valve is compact in structure and ingenious in design, and may fully achieve the objective of dispensing of large amount colorant or a small amount colorant by rotating the valve core; moreover, the objectives of cleaning the pump and preventing colorant drying and hardening in a colorant circulating pipe and a colorant outlet may be achieved.

Abstract: The control valve for pouring color paste in both large amount and small amount, comprising a valve body and a valve element disposed in the valve body. The valve body is provided with a large pump inlet-outlet opening, a small pump inlet-outlet opening, a colorant bucket inlet-outlet opening and a colorant dispensing outlet.

Abstract: A pump capable of dispensing both a large volume and a small volume of colorant comprises a large reciprocating positive displacement pump having a large reciprocating part, a large pump body and a large pump inlet-outlet opening, characterized in that: a small reciprocating part fixed to the large reciprocating part is disposed in the large pump body; a small pump body is disposed on a base of the large pump body, and provided with a small pump inlet-outlet opening; and the small reciprocating part, the small pump body and the small pump inlet-outlet opening constitute a small reciprocating positive displacement pump.

Abstract: Embodiments of methods, systems, or apparatuses relating to adjusting a brightness level associated with at least a portion of a backlight of a display device.