Light-source module for display device and display device...

Details Light-source module for display device and display device... Light-source module for display device and display device...

2011-08-16

2011-08-16

Tran, Thuy Vinh (Department: 2821)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C315S308000

Reexamination Certificate

active

07999785

ABSTRACT:
A light-source module for a display device and a display device having the same, in which the light-source module includes a plurality of light-emitting units, a current difference controller, and a converter. The light-emitting units are connected in parallel between a driving power input terminal and a ground terminal to emit light by the diving power and to output respective feedback control signals. The current difference controller is configured to output a plurality of power control signals according to the respective feedback control signals. The converter is configured to change a current of the driving power provided to the light-emitting units according to the power control signals. The amounts of currents flowing through the light emitting units each having a plurality of light emitting diodes are measured and the levels of voltages applied to the light-emitting units are changed according to the measurement results. Accordingly, a current difference between the light emitting units can be reduced and the brightness uniformity of the light source can be improved.

REFERENCES:
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patent: 2004/0213015 (2004-10-01), Ito et al.
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patent: 2006112459 (2006-10-01), None
Search Report issued by the EPO on Jun. 18, 2010 corresponding to European Patent Application No. 08012742.6.

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