Light-emission controlling apparatus

Details Light-emission controlling apparatus Light-emission controlling apparatus

1997-09-04

1999-06-01

Wong, Don

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315224, 315308, 315DIG7, G05F 100

Patent

active

059090901

ABSTRACT:
There is provided a light-emission controlling apparatus comprising a light-emission time integrating unit (107) for measuring the integral of the length of time that an electric discharge lamp (106) has emitted light, a comparing unit (1082) for comparing the integral of the length of time that the electric discharge lamp (106) has emitted light which is measured by the light-emission time integrating unit (107) to a reference value, a light-emission mode selecting unit (1083) for selecting either a first light-emission mode or a second light-emission mode according to a comparison result from the comparing unit (1082) so as to cause the electric discharge lamp (106) to emit light in one light-emission mode selected, and a display controlling unit (1084) for transmitting information about the comparison result from the comparing unit (1082) as the information about the light-emission state of said light-emitting means, by way of a local are network (109), to a display device (500 and 501) disposed outside the light-emission controlling apparatus, and for displaying the information on the display device.

REFERENCES:
patent: 5111118 (1992-05-01), Fellows et al.
patent: 5589742 (1996-12-01), Ueda
patent: 5604406 (1997-02-01), Gaus
patent: 5604411 (1997-02-01), Venkitasubrahmanian et al.
patent: 5646484 (1997-07-01), Sharma et al.
patent: 5663613 (1997-09-01), Yamashita et al.
patent: 5696431 (1997-12-01), Giannopoulos et al.
patent: 5770928 (1998-06-01), Chansky et al.

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