Light quantity adjusting method, light quantity adjusting...

Details Light quantity adjusting method, light quantity adjusting... Light quantity adjusting method, light quantity adjusting...

2006-10-17

2006-10-17

Dinh, Trinh Vo (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S300000, C315S302000, C315S297000

Reexamination Certificate

active

07122974

ABSTRACT:
A light quantity adjusting method is used for driving a light emitting device with two drive current levels. The drive current levels are controlled by the first set data and the second set data, respectively. First, a resolution ratio and light quantity characteristics are stored. The resolution ratio represents a ratio between a drive current setting resolution of the first set data and a drive current setting resolution of the second set data. The light quantity characteristics represents a relationship between the first set data and a light emission quantity of the light emitting device. A value in the first set data is obtained as a first set value through adjustment for a quantity of light. Next, a change amount, from the first set value in the first set data is calculated using the light quantity characteristics. The calculated change amount is converted into a value in the second set data as a second set value using the resolution ratio.

REFERENCES:
patent: 6711352 (2004-03-01), Kohno et al.
patent: 2002/0196418 (2002-12-01), Hagiwara et al.
patent: 2005/0017998 (2005-01-01), Han
patent: 2006/0038511 (2006-02-01), Tagawa
patent: 8-23422 (1996-01-01), None

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