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Vacuume fluorescent display module and driving method thereof

A technology driven by fluorescent display tubes and filaments, applied in static indicators, energy-saving control technology, instruments, etc., can solve problems such as brightness changes, and achieve the effect of preventing display flickering

Inactive Publication Date: 2013-07-31
FUTABA CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0027] However, in the VFD, the main factor determining the luminance is the length of the above-mentioned anode lighting period, but the driving voltage of the filament 100 may also be a factor that changes the luminance in terms of other factors.

Method used

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  • Vacuume fluorescent display module and driving method thereof
  • Vacuume fluorescent display module and driving method thereof
  • Vacuume fluorescent display module and driving method thereof

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Embodiment Construction

[0100] Embodiments of the present invention will be described below.

[0101] In addition, the description is performed in the following order.

[0102]

[0103]

[0104]

[0105]

[0106]

[0107] figure 1 It is a diagram for explaining the driving method as the first embodiment.

[0108] Here, include the figure 1 In addition, in the following description, as the grid G ​​and the anode A formed in a VFD (Vacuum Fluorescnet Display, a fluorescent display tube), there are m (m is a natural number greater than 2) grids G1 to Gm. pole G, and n (n is a natural number greater than 2) anodes A from anodes A1 to An. Furthermore, the driving signals for the gates G1 to Gm are respectively denoted as gate signals g1 to gm, and the driving signals for the anodes A1 to An are respectively denoted as anode signals a1 to an.

[0109] At figure 1 , as examples of the waveforms of the gate signals g1 to gm and the anode signals a1 to an are illustrated with the same Figure...

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Abstract

The invention relates to a fluorescent display module and a driving method, with a view to disclosing a VFD with brightness adjusting function, especially is used for preventing display flicker. A fixed filament driving signal is generated at a difference of the edge position to start timing of a head anode lighting period which is placed at a head of each scan period of a grid in each scan period, and the driving signal drives the filament, thereby preventing the filament driving signal in the anode brightening period (grid signal and anode signal are in the conduction period) differs according to length of H level period in each scan, or even the difference is generated, the difference is regular. As a result, the observed brightness reduction in each scan can be prevented, and display flicker can be prevented.

Description

technical field [0001] The present invention relates to a fluorescent display tube module and a driving method of the fluorescent display tube. The fluorescent display tube module is composed of a fluorescent display tube and a driving circuit portion thereof. Background technique [0002] (Background Art Document) [0003] (patent literature) [0004] Patent Document 1: Japanese Patent Laid-Open No. 8-278763 [0005] Figure 15 It is a schematic structural diagram of a VFD (Vacuum Fluorescent Display). [0006] In addition, in Figure 15 Among them, the structure related to the VFD is the structure related to the display of the information of only one digit is extracted and displayed. [0007] As in the VFD of the prior art, a filament 100 (direct heating cathode), a grid 101 and an anode (segment) 102 are arranged in a vacuum container. In the VFD, the filament 100 is heated by applying an AC voltage to emit hot electrons, and the hot electrons are accelerated at the g...

Claims

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Application Information

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IPC IPC(8): G09G3/06
CPCY02B20/42G09G3/12G09G3/20G09G3/30
Inventor 刈谷真
Owner FUTABA CORPORATION