Display system and lighting device used therein
OwnerTomoki Kobori, Satoshi Ouchi +2inventors
InventorsTomoki Kobori, Satoshi Ouchi, Taro Imahase, Atsushi Maruyama
Life of this patent
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Abstract
In a drive circuit of light emission device arrays each having at least one light emission device, at least one of the light emission diode arrays is pulse-driven with a pulse of phase different from the other light emission device arrays. While the at least one light emission device array driven with a different phase is OFF, a processing circuit acquires the luminiferous level of each of the other light emission device arrays by using the at least one light emission device array which is OFF as a light reception device. Furthermore, a control circuit controls the drive level of the drive circuit for the light emission device arrays which are ON.
Claims12
A lighting device comprising:
- a plurality of light emission device arrays, each having at least one light emission device;
- a drive circuit for pulse-driving at least one of the light emission device arrays with a pulse of phase different from the other light emission device arrays;
- a processing circuit for calculating the luminiferous level of each of the other light emission device arrays using the at least one light emission device array as a light reception device while it is OFF, and
- a control circuit for controlling the drive level of the other light emission device arrays which are ON, according to the luminiferous level of each of the other light emission device arrays.
A display device comprising:
- a lighting device;
- a display panel for controlling light transmission amount or reflection amount from the lighting device according to an input video signal;
- and
- a projection device for displaying the transmission light or reflection light from the display panel,
- said lighting device comprising:
- a plurality of light emission device arrays, each having at least one light emission device;
- a drive circuit for pulse-driving at least one of the light emission device arrays with a pulse of phase different from the other light emission device arrays;
- a processing circuit for calculating the luminiferous level of each of the other light emission device arrays using the at least one light emission device array as a light reception device while it is OFF;
- and
- a control circuit for controlling the drive level of the other light emission device arrays which are ON, according to the luminiferous level of each of the other light emission device arrays.
Dependencies are inferred from the claim text.