BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic waveform diagram of an operating status of an electric discharge lamp of the present invention;
FIG. 2 is a flow chart of a control of the present invention;
FIG. 3 is a schematic view of a preferred embodiment of the present invention; and
FIG. 4 is a schematic view of another preferred embodiment of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention will now be described in more detail hereinafter with reference to the accompanying drawings as follows:
The present invention provides a control method for pre-warning an aging electric discharge lamp that can produce a pre-warning signal when the electric discharge lamp is aged, so that users can change the lamp before the electric discharge lamp breaks down. Referring to FIGS. 1 and 2 for the schematic waveform diagram of an operating state of the electric discharge lamp and the flow chart of a control according to the present invention respectively, the control method for pre-warning an aging electric discharge lamp 30 of the invention comprises the steps of determining a normal performance parameter S1 of the electric discharge lamp 30; building the normal performance parameter S1 in an arithmetic logic unit 26, and the normal performance parameter S1 could be an operating power parameter of the electric discharge lamp 30, wherein the power parameter could be a voltage V, a current I, or a lumen of the electric discharge lamp 30 as the normal performance parameter S1, and using a detector 25 to turn on the electric discharge lamp 30 and obtain an operating performance parameter S2, S3, S4 (and only one operating performance parameter S2, S3, S4 is selected). In FIG. 1, the operating performance parameter S2, S3 is a voltage V, a current I or a lumen of the electric discharge lamp 30, and the operating performance parameter S4 before the electric discharge lamp is aged and the time t are considered as having a stable horizontal parallel relation. If the operating performance parameter S2, S3 adopts a voltage V or a current I as its power parameter, and the electric discharge lamp 30 is aged, the electric resistance in the electric discharge lamp 30 will be increased greatly and the detector 25 will detect a change of voltage V and current I of the electric discharge lamp 30, and the detector 25 will feed back the change of the operating performance parameters S2, S3, S4 to the arithmetic logic unit 26 for comparing with the normal performance parameter S1. If the normal performance parameter S1 and the operating performance parameter S2, S3, S4 are not equal, it indicates that the electric discharge lamp 30 has entered into an aging state, and thus an aging signal of the electric discharge lamp 30 will be outputted, and the aging signal will be shown on a display device 40, so that users can receive the aging message of the electric discharge lamp 30.
Referring to FIG. 2 for the flow chart of the present invention, an electric power is supplied to an inverter 23 by a power source 10 to turn on an electric discharge lamp 30. The inverter 23 of the invention is controlled by a driving controller 22 to input a voltage V of the electric discharge lamp 30, and then a dimmer controller 21 is used to control the driving controller 22 to determine the lumen of the electric discharge lamp 30, and the driving controller 22 and the arithmetic logic unit 26 can be integrated into a microcontroller.
The normal performance parameter S1 of the electric discharge lamp 30 is set in an arithmetic logic unit 26 first, and the detector 25 receives operating performance parameters S2, S3, S4 inputted from the inverter 23 into the electric discharge lamp 30 and outputted by the electric discharge lamp 30. The arithmetic logic unit 26 compares the normal performance parameter S1 and the operating performance parameters S2, S3, S4. If the two performance parameters are not equal, then the arithmetic logic unit 26 will produce an aging signal of the electric discharge lamp 30 on a display device 40.
If the foregoing normal performance parameter S1 adopts the lumen as a reference value of the arithmetic logic unit 26, and the dimmer controller 21 controls the lumen of the electric discharge lamp 30, the intensity of lumen will vary the aging extent and speed of the electric discharge lamp 30, and thus the normal performance parameter S1 inputted to the arithmetic logic unit 26 still needs to refer to the dimming parameter adopted by the dimmer controller 21. The dimming parameter of the invention determines different normal performance parameters S1 to accurately obtain the point of timing t for the aging of the electric discharge lamp 30 and provide users a pre-warning signal.
When the present invention generates a pre-warning signal to users, the following embodiment can be used for letting users know about the pre-warning signal of the aging of the electric discharge lamp 30. Referring to FIG. 3 for the schematic view of showing the pre-warning signal according to a preferred embodiment of the present invention, a display screen 50 adopts a control method of pre-warning an aging electric discharge lamp 30 of the invention (or a display screen 50 that adopts an electric discharge lamp 30 as the radiating light source), and a display device 40a for generating an aging signal of the electric discharge lamp 30 can be installed at the frame of the display screen 50, and the display device 40a is a lamp set, and each electric discharge lamp 30 has a corresponding light bulb, and thus the display device 40a can receive the aging signal of the electric discharge lamp 30 to produce light, when the electric discharge lamp 30 is aged, so that users can know that the electric discharge lamp 30 of the display device 40a is aged.
Referring to FIG. 4 for another preferred embodiment of the present invention, a display device 40b is installed at a display panel 51 on the display screen 50, wherein after the display device 40b is digitized, a status field of an aging state of the electric discharge lamp 30 is displayed on the display panel 51. If the status field shows a pre-warning signal for an aging of the electric discharge lamp 30, users can change the aged electric discharge lamp 30 according to the information given by the status field.
In the arithmetic logic unit 26, the performance parameter serving as a basic value for an aging of the electric discharge lamp 30 can be set as an aging performance parameter. If the operating performance parameter S2, S3, S4 detected by the detector 25 is equal to the aging performance parameter, then an aging signal of the electric discharge lamp 30 will be outputted. Further, the arithmetic logic unit 26 also can set the normal performance parameter S1 and the aging performance parameter of the electric discharge lamp 30, such that if the electric discharge lamp 30 has not produced an aging state yet, its operating performance parameter S2, S3, S4 will be equal to the normal performance parameter S1, and the arithmetic logic unit 26 will output a normal signal of the electric discharge lamp 30 to the display device 40b, and the display device 40b will display the normal state to indicate that the electric discharge lamp 30 is normal. If the operating performance parameter S2, S3, S4 is equal to the aging performance parameter, then the arithmetic logic unit 26 will output an aging signal of the electric discharge lamp 30 to the display device 40b and show a message for indicating the aging phenomenon of the electric discharge lamp 30.
While the invention has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of the invention set forth in the claims.
Patent Application
20070281571
