Fluorescent lamp lighting device

A technology for lighting devices and fluorescent lamps, applied in lighting devices, light sources, electric light sources, etc., can solve problems such as high overhead, and achieve the effects of convenient sales management and convenient inventory management

Inactive Publication Date: 2006-01-04
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the lighting demand changes, it is necessary to replace the fluorescent lamp lighting device or the lighting fixture with a built-in fluorescent lamp lighting device, which has to cost a lot of money and time.

Method used

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  • Fluorescent lamp lighting device
  • Fluorescent lamp lighting device
  • Fluorescent lamp lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0091] figure 1 It is a circuit block diagram showing Embodiment 1 for a fluorescent lamp lighting device embodying the present invention. In this form, the fluorescent lamp lighting device FOC has a high-frequency lighting circuit HFO, a dimming control circuit DCC, an initial illuminance correction control circuit ICC, a switching unit SM, and a direct current power supply DC. In the figure, the symbol FL is a fluorescent lamp, ODS is an external dimming signal generating circuit, and AC is a low-frequency alternating current power supply.

[0092] The high-frequency lighting circuit HFO is composed of an inverter main body INV and an inverter control circuit INC. The inverter control circuit INC is a circuit that controls the inverter main body INV as needed, and drives the inverter main body INV by supplying a frequency-controlled drive signal to the inverter main body INV, for example.

[0093] The dimming control circuit DCC generates a dimming control signal, which is...

Embodiment approach 2

[0102] Figure 2 to Figure 4 Embodiment 2 for carrying out the fluorescent lamp lighting device of the present invention is shown, figure 2 is the block diagram of the circuit, image 3 is the flow chart of the switching unit during switching operation, Figure 4 It is a waveform diagram showing the relationship between the power supply on-off waveform and the waveform of the microcomputer power supply voltage Vdd. In this embodiment, the output of the power supply on-off regulation detection circuit OND is configured to control the switching unit SM.

[0103] The detection circuit OND and the switch unit SM are composed of a microcomputer in charge of the control of the fluorescent lamp lighting device. When the switch is completed in cooperation with each other, the image 3 The operation shown in the flowchart.

[0104] That is, flags are created and stored in the microcomputer in advance for the initial illuminance correction control lighting mode and the external cont...

Embodiment approach 3

[0110] Figure 5 and Figure 6 Embodiment 3 for carrying out the fluorescent lamp lighting device of the present invention is shown, Figure 5 is a flowchart of the switching operation of the switching unit, Figure 6It is a waveform diagram showing the relationship between the power supply on-off waveform and the power supply voltage Vdd of the microcomputer. The difference between this mode and mode 2 is: structurally, the fluorescent lamp lighting device can change the lighting mode when there is no load. Only the parts different from the mode 2 will be described below.

[0111] That is, after initialization and status verification, verify the presence or absence of load. If the fluorescent lamp lighting device is in a load state, the state flag is changed so that switching of the lighting mode is not performed. If it is a no-load state, it is judged whether the number of on-off times of the next low-frequency alternating current power source AC is more than a predeter...

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PUM

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Abstract

The invention provides a fluorescent lamp illumining device, which can control the correction of the illuminating value at early stage, which is both applicable for illumination control systems which can comprehensively control the entire illuminated space and a single light fixture. The fluorescent lamp illumining device (FOC) comprises: a high frequency illumining circuit (HFO) to illumine a fluorescent lamp in a high frequency way; a light adjustment control circuit (DCC) which controls the high frequency illumining circuit (HFO) so that a discharge lamp (FL) is illumined in a light adjustment way; an illuminating value corrective control unit which controls the light adjustment control circuit (DCC) so as to inhibit the illuminating value of the fluorescent lamp at the early stage, and maintains the illuminating value of the fluorescent lamp (FL) approximately constant without being restricted to the illuminating value of the early stage of illumination course; and a switch module, which selects either the illuminating value corrective control circuit or an external light adjustment signal controls the light adjustment control circuits, and switches the fluorescent lamp to either the illuminating value corrective control illumining mode or the external control light adjustment illumining mode.

Description

technical field [0001] The present invention relates to the improvement of a fluorescent lamp lighting device with an initial illuminance correction control circuit. Background technique [0002] Fluorescent lamps have a property that they are brightest at the beginning of lighting and then decrease in brightness as the lighting time elapses. This property can be represented by a beam attenuation curve. Correspondingly, even if the space to be illuminated is generally illuminated with fluorescent lamps, it is preferable to always illuminate it with a certain illuminance. Therefore, the method adopted is: from the initial stage of the fluorescent lamp circuit, the dimming ratio is set to a value as small as possible, and its light beam only decreases with the experienced lighting time to dim the lighting, and as time goes by, The dimming ratio increases sequentially, so that the space to be illuminated is always illuminated with constant illuminance until the service life o...

Claims

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Application Information

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IPC IPC(8): H05B41/24H05B41/392
CPCY02B20/202
Inventor 浦谷和幸寺坂博志平冈敏行岩井直子宇佐美朋和高桥浩司北村纪之野木新治
Owner TOSHIBA LIGHTING & TECH CORP
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