Liquid crystal display device having an improved lighting device
AssigneesHitachi, Ltd., Hitachi Device Engineering Co., Ltd.
InventorsJunichi Hirakata, Kikuo Ono, Akira Shingai
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Abstract
A liquid crystal display device includes a liquid crystal display panel having plural pixels, a lighting device having at least one light source and projecting light generated by the light source on the liquid crystal display panel, and a circuit supplying a first current during a first period and a second current smaller than the first current during a second period to the light source alternately. The circuit includes a current monitoring circuit which measures the first current and the second current, and a light control circuit which adjusts a ratio of the first period to the second period based upon a signal from the current monitoring circuit.
Claims5
A liquid crystal display device comprising:
- a liquid crystal display panel having a plurality of pixels;
- a lighting device having at least one light source and projecting light generated by the at least one light source on the liquid crystal display panel;
- and
- a circuit supplying a first current during a first period and a second current smaller than the first current during a second period to the at least one light source alternately,
- wherein the circuit has a current monitoring circuit which measures the first current and the second current, and a light control circuit which adjusts a ratio of the first period to the second period based upon a signal from the current monitoring circuit.
Dependencies are inferred from the claim text.