CIRCUIT, CONTROL PROGRAM, AND RECORDING MEDIUM

摘要

An LED driver circuit includes light-element lines, a general purpose LED driving circuit that controls a current value, and current compensation lines respectively connected to the light-element lines. Each of the current compensation lines is provided with a fixed current source and a switch, and the switch switches an open/closed state of the current compensation line.

主权项

1. A circuit, comprising:
a plurality of light-element lines connected to each other in parallel; a current control element that controls a sum of current flowing through the light-element lines so as to be at a constant value; and current compensation lines connected in parallel to the respective light-element lines, wherein each of the light-element lines includes:
a light-emitting portion; anda detection unit connected in series to the light-emitting portion and detecting an open/closed state of the light-element line, wherein each of the current compensation lines includes:
a fixed current source that, when the light-element line that is coupled to the current compensation line is closed, generates a current at approximately the same value as a current flowing through said light-element line; anda switch that is connected in series to the fixed current source and switches the open/closed state of the current compensation line, wherein the switch closes the current compensation line so that said current compensation line is electrically connected in parallel to the corresponding light-element line coupled thereto when the detection unit of said light-element line detects that the light-element line is open, and opens the current compensation line so as not to be electrically connected in parallel to the light-element line when the light-element line is detected as closed.