Current distributor

Details Current distributor Current distributor

2011-03-22

2011-03-22

Vo, Tuyet Thi (Department: 2821)

Computer graphics processing and selective visual display system

Display driving control circuitry

Display power source

C345S082000, C345S084000, C345S090000, C345S204000

Reexamination Certificate

active

07911461

ABSTRACT:
A current distributor that simplifies the architecture and reduces the connecting wires. According to the invention, current distributor can be utilized for distributing the current evenly through a plurality of rows of light-emitting diodes. Each respectively is coupled between a supply pin and a first current pin. The first current pin is coupled to the current distributor. The current distributor is coupled to a total current pin. The current distributor comprises a first resistor, a plurality of first clamp circuitries, a second clamp circuitry and a plurality of first transistors. The first resistor has a first end and a second end. The first end is coupled to the supply pin. Each of the plurality of first clamp circuitries has a first terminal and a second terminal. Each of the first terminal of the first clamp circuitries is coupled to the second end of the first resistor. Each of the second terminal of the first clamp circuitries is coupled to the first current pin. The second clamp circuitry has a first terminal and a second terminal. The second terminal of the second clamp circuitry is coupled to the second end of the first resistor. The plurality of first transistors has a first terminal, a second terminal and a gate. The first terminal is coupled to the first current pin. The gate is coupled to the cathode of the second diode. The second terminal is coupled to the total current pin.

REFERENCES:
patent: 7847783 (2010-12-01), Liu et al.

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