JP2005123027A - Fluorescent lamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve both a first problem wherein it is not possible to detect the lifetime and carry out exchange before blink and flicker occur, and a second problem wherein it is not possible to detect the state where individual fluorescent lamps reach their lifetimes to stop lighting, concerning lighting lifetime of the fluorescent lamp and its monitoring device. <P>SOLUTION: In a circuit in which lighting is carried out by generating a pulse voltage between an electrode 4 and an electrode 4' of the fluorescent lamp 3, by using an analog electronic lighting tube 10 utilizing resonance, having an oscillating circuit 9 and a stabilizer 6, 95% lifetime reaching signal 15 is outputted, when the pulse voltage between the electrode 4 and the electrode 4' is inputted into a calculating lighting pulse arithmetic circuit 14 and the pulse number, which exceeds 95% lifetime reaching the pulse number set beforehand, has been counted. Furthermore, this has such a constitution that a non-lighting signal 17 is outputted, when the voltage, between the electrodes of the fluorescent lamp is inputted into a measurement circuit 16 of the voltage between the electrodes and the voltage exceeding a non-lighting voltage set beforehand, has been measured. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a life-time lighting and monitoring device of a fluorescent lamp.

As a conventional technique, Patent Document 1 proposes a method of counting a blinking state that occurs at the end of the life of a fluorescent lamp and turning off the fluorescent lamp. Patent Document 2 proposes a method for detecting a change in a current waveform due to flickering that occurs at the end of the life of a fluorescent lamp. In Patent Document 3, a method is proposed in which the cumulative lighting time of a fluorescent lamp is integrated and the lifetime is determined by comparison with the lifetime.
JP 62-122097 A (paragraphs 0009-0011, FIG. 1) Japanese Patent Laid-Open No. 10-261492 (paragraphs 0007 to 0013, FIG. 1) JP 2002-8879 (paragraphs 0010 to 0017, FIG. 1)

  In the above-mentioned background art, in Patent Documents 1 and 2, a phenomenon in which a blinking or flickering state at the end of life occurs is detected, and the blinking or flickering is detected in order to detect a state in which the lighting blinks or flickers. There was a first problem that the lifetime could not be detected and replaced before. Similarly, in Patent Document 3, since the cumulative lighting time of the fluorescent lamp is integrated, the variation in the life of each fluorescent lamp and the change in the life due to the operating temperature are not taken into consideration, and each fluorescent lamp reaches the life. However, there was a second problem that the unlit state could not be detected.

  The first problem is that a pulsed high voltage is applied between the ballast and the electrodes of the fluorescent lamp, and when the fluorescent lamp is turned on, the application of the high voltage is stopped and the lighting is continued. In a fluorescent lamp device configured with lighting means, lighting pulse counting means for counting the number of times of application of the high voltage pulse, and when the number of pulses counted exceeds a preset life reaching pulse number, the life is reached. Since the pulse counting judging means for outputting a signal is provided, when the fluorescent lamp is consumed by the lighting time and starting, the starting is delayed and the number of pulses until lighting is increased. Since this pulse is counted by counting hand throwing, it is possible to detect the arrival of a predetermined life reaching pulse, so that the life can be detected before blinking or flickering occurs. Thereby, the first problem can be solved.

  The second problem is that a pulsed high voltage is applied between the fluorescent lamp, the ballast, and the electrodes of the fluorescent lamp, and when the fluorescent lamp is turned on, the application of the high voltage is stopped and the lighting is continued. In the fluorescent lamp device constituted by the voltage application lighting means, when the number of the application of the high voltage pulse is counted, and when the number of pulses exceeding the preset number of alarm pulses is counted. A pulse count determination means for outputting a life end warning signal, and a lighting detection means for outputting a fluorescent lamp non-lamp signal when a voltage exceeding the preset fluorescent lamp lighting voltage is generated by inputting the voltage between the electrodes of the fluorescent lamp. When the fluorescent lamp is not lit, the lighting detection means detects that the voltage between the electrodes has risen above the lighting voltage and outputs a non-lighting signal. As a result, the non-lighting of the fluorescent lamp can be reliably detected, so that the second problem can be solved.

  A pulsed state in which a high voltage of pulse depression is applied between the fluorescent lamp, the ballast, and the electrodes of the fluorescent lamp, and the application of the high voltage is stopped and the lighting is continued when the fluorescent lamp is turned on. In a fluorescent lamp apparatus configured with voltage application lighting means, when the number of pulses applied exceeds the preset number of pulses reaching the lifetime, the lighting pulse counting means for counting the number of times of application of the high voltage pulse is counted. Since the pulse count judging means for outputting the life reaching signal is provided, the life can be detected before the occurrence of flickering or flickering.

  Since the fluorescent lamp device according to claim 2 is provided with pulse counting determination means for outputting a non-lighting signal when counting the number of pulses exceeding the number of non-lighting detection pulses set in advance. Irrespective of fluorescent lamps, it is possible to detect non-lighting of individual fluorescent lamps regardless of variations in the lifetime of fluorescent lamps or changes in lifetime due to operating temperatures.

  FIG. 1 is a circuit diagram showing a configuration of an embodiment of the present invention, FIG. 2 is a diagram showing a lighting circuit of a fluorescent lamp using a glow lighting tube, and FIG. 3 shows a relationship between a lighting time and a lighting start voltage. FIG. 4 is a diagram showing the lighting voltage and lighting start voltage characteristics, FIG. 4 is a diagram showing the lighting start voltage characteristics showing the lighting start voltage at 95% lifetime in the relationship between the lighting time and the lighting start voltage, and FIG. 6 is a circuit diagram for lighting using an analog electronic lighting tube using resonance, FIG. 6 is a diagram showing temporal changes in the interelectrode voltage and interelectrode current when the circuit is lit, and FIG. 7 is the number of lighting pulses. FIG. 8 is a diagram illustrating the relationship between the starting current and the lighting start voltage. FIG. 8 is a diagram illustrating the starting current starting voltage when the lamp is not lit and the time variation of the starting voltage when the fluorescent lamp is not lit. It is.

  In FIG. 2, when the power source 1 is turned on, a current flows through the glow lighting tube 2, and a current flows through the filaments of the electrodes 4, 4 ′ of the fluorescent tube 3. When the temperature of the filament is listed and the discharge current 5 flows between the electrodes 4, 4 ', the current in the glow lighting tube 2 disappears, and the ballast 6 stabilizes the boosting and the discharge current 5 to continue the lighting state. The electrodes 4 and 4 ′ of the fluorescent lamp 1 are consumed depending on the lighting time. In this circuit, the voltage at which the fluorescent lamp 1 starts to light by raising the power supply voltage from 0 V at a slow speed is called a lighting start voltage. FIG. 3 shows changes in lighting time and lighting start voltage. The lighting start voltage rises at the end of the life and goes out when the power supply voltage is reached. In FIG. 4, the 95% life lighting start voltage 8 of 95% time 7 of the life is shown. When the lighting start voltage reaches the 95% life lighting start voltage 8, it can be diagnosed that 95% of the life has been reached. Next, in FIG. 5, the fluorescent lamp 3 has a pulse voltage (not shown) between the electrodes 4 and 4 ′ of the fluorescent lamp 3 using an analog electronic lighting tube 10 using resonance having a transmission circuit 9 and a ballast 6. ) To light up. FIG. 6 shows temporal changes in the interelectrode voltage and interelectrode current when the circuit is turned on. The number of pulse voltages 11 generated until the start of lighting is referred to as the number of lighting pulses. In the figure, when the fluorescent lamp is turned on, the voltage between the electrodes becomes the voltage at the time of lighting and is stabilized. FIG. 7 shows the relationship between the number of lighting pulses and the lighting start voltage. The lighting start voltage can be obtained from the number of lighting pulses. Thereby, the 95% life lighting pulse number corresponding to the 95% life lighting start voltage can be set. FIG. 9 is a non-lighting current pressure diagram showing temporal changes in the starting current and the starting voltage when the fluorescent lamp is not lit in the fluorescent lamp circuit using the analog electronic lighting tube in FIG. 8. In non-lighting, the voltage between electrodes becomes a non-lighting voltage 13 higher than the lighting voltage 12. In FIG. 1, the pulse voltage between the electrodes 4 and 4 'is input to the lighting pulse coefficient circuit 14 for counting the number of pulses exceeding a preset 95% life reaching pulse number (not shown). A 95% life reaching signal 15 is output. Further, the voltage between the electrodes of the fluorescent lamp is input to the interelectrode voltage measuring circuit 16 and a non-light signal 17 is output when a voltage exceeding a preset non-light voltage is measured. Thereby, it is possible to detect the 95% life of the fluorescent lamp and to detect a non-light.

It is a circuit diagram which shows the structure of embodiment of this invention. It is a figure which shows the lighting circuit of the fluorescent lamp using a glow lighting tube. It is a figure which shows lighting time and lighting start voltage characteristic. It is a figure which shows the lighting start voltage characteristic which shows the lighting start voltage in 95% lifetime. It is a figure which shows the lighting circuit using an analog electronic lighting tube. It is a figure which shows the time change of the voltage between electrodes at the time of lighting, and the current between electrodes. It is a figure which shows the relationship between the number of lighting pulses, and a lighting start voltage. It is a figure which shows the time change of the starting current at the time of a fluorescent lamp non-lighting, and a starting voltage.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply 2 Glow lighting tube 3 Fluorescent tube 4 Electrode 5 Discharge current 6 Ballast 10 Analog electronic lighting tube 14 Lighting pulse coefficient circuit 15 95% life attainment signal 16 Interelectrode voltage measurement circuit 17 Unlit signal

Claims (2)

  Consists of pulsed voltage application lighting means that applies a pulsed high voltage between the fluorescent lamp and ballast, and the electrodes of the fluorescent lamp, and stops applying the high voltage and continues lighting when the fluorescent lamp is lit In the fluorescent lamp apparatus, the lighting pulse counting means for counting the number of times the high voltage pulse is applied, and a life reaching signal is output when the number of counted pulses exceeds the preset life reaching pulse number. A fluorescent lamp device comprising a pulse counting determination means. The fluorescent lamp device according to claim 1, further comprising an interelectrode voltage measuring means for measuring a voltage between the electrodes of the fluorescent lamp and outputting a non-light signal when measuring a voltage exceeding a preset non-light test voltage. A fluorescent lamp device characterized by that.

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