US 2010/0060201 A1Published application

Method of controlling a ballast for a high intensity discharge lamp and related system

AssigneeIndustrial Technology Research Institute

InventorsLi-Ling LEE, Ching-Ran Lee, Jia-Hong Chen, Chin-Sien Moo, Sheng-Yi Tang

Life of this patent

Estimating the term…

Loading patent…

Abstract

A method of controlling a ballast for a high intensity discharge (HID) lamp and related system. The method includes setting initial operating parameters of the ballast to turn on the HID lamp, generating starting transient electric characteristic values of the HID lamp by measuring actual electric parameters at a predetermined time during a transient process after the HID lamp is turned on, searching stored data for a rated power corresponding to the starting transient electric characteristic value range of the HID lamp after determining that the starting transient electric characteristic value is within stored starting transient electric characteristic value ranges of the HID lamp, and searching the stored data for a corresponding ballast operating parameter, to allow the HID lamp to operate in the corresponding rated power, and realize that a single ballast can be adapted to and control the HID lamps to operable in their respective specific rated power.

Claims20

Dependent claims

A method of controlling a ballast for a high intensity discharge (HID) lamp, the method comprising the following steps of:

(a) outputting an initial operating parameter to the ballast to turn on the HID lamp;
(b) measuring an actual electric parameter at least one predetermined time during a transient process after the HID lamp is turned on, and generating a starting transient electric characteristic value of the HID lamp;
(c) determining whether the starting transient electric characteristic value is within a starting transient electric characteristic value range of the HID lamp, and searching stored rated power for a rated power corresponding to the HID lamp according to a corresponding associated relation between the starting transient electric characteristic value range of the HID lamp and the stored rated power if the starting transient electric characteristic value is within the starting transient electric characteristic value range of the HID lamp;
and
(d) searching the stored rated power for a corresponding ballast operating parameter according to a corresponding associated relation between the stored rated power and the ballast operating parameter, and outputting the corresponding ballast operating parameter to the ballast, to allow the HID lamp to operate in the corresponding rated power.

2 more elements

A system for controlling a ballast for a HID lamp, comprising:

a setting module for outputting an initial operating parameter to the ballast to turn on the HID lamp;
a measuring module for measuring an actual electric parameter at least one predetermined time during a transient process after the HID lamp is turned on;
and
a processing module for receiving the actual electric parameter measured by the measuring module and generating a starting transient electric characteristic value of the HID lamp, determining whether the starting transient electric characteristic value is within stored starting transient electric characteristic value ranges of the HID lamp, searching stored rated power for a rated power according to a corresponding associated relation between the stored starting transient electric characteristic value ranges of the HID lamp and the stored rated power, searching stored data for a corresponding ballast operating parameter according to a corresponding associated relation between the stored rated power and the ballast operating parameter, and outputting the corresponding ballast operation parameter to the ballast, to allow the HID lamp to operate in the corresponding rated power.

1 more element

Dependencies are inferred from the claim text.