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Fluorescent display tube module and driving method

A fluorescent display tube and driving method technology, applied in static indicators, instruments, etc., can solve problems such as brightness changes, and achieve the effect of preventing display flickering

Inactive Publication Date: 2016-04-27
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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  • Fluorescent display tube module and driving method
  • Fluorescent display tube module and driving method
  • Fluorescent display tube module and driving method

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Embodiment Construction

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

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

[0102]

[0103]

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[0105]

[0106]

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

[0108] Here, include the figure 1In 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 G of grids G1 to Gm. , 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 18 Same wa...

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Abstract

PROBLEM TO BE SOLVED: To provide a vacuum fluorescent display (VFD) with brightness adjustment function which prevents occurrence of display flicker that is sensed particularly in low brightness.SOLUTION: A filament driving signal is generated which has a constant difference of an edge position with respect to the start timing of a head anode light emission period in each grid scan, and a filament is driven in accordance with the driving signal. This can prevent a length of the period when the filament driving signal is in H level from varying for each scan in an anode light emission period (a period when both a grid signal and an anode signal are turned on), or can provide regular variations even if variations occurred, thereby preventing a decrease in brightness for each scan from being sensed to prevent the display flicker.

Description

technical field [0001] The present invention relates to a fluorescent display tube module (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 part thereof. Background technique [0002] (Background technical literature) [0003] (patent documents) [0004] Patent Document 1: Japanese Patent Application Laid-Open No. 8-278763 [0005] Figure 15 It is a schematic structure diagram of VFD (Vacuum Fluorescent Display, vacuum fluorescent display tube). [0006] In addition, in Figure 15 Among them, the VFD structure is a structure for extracting and displaying only one-digit information for display. [0007] Like the VFD in the prior art, a filament 100 (directly heated cathode), a grid 101 , and an anode 102 are arranged in a vacuum container. In the VFD, an AC voltage is applied to the filament 100 to heat it to release thermal electrons, and the thermal electron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/06
CPCG09G3/12G09G3/20G09G3/30
Inventor 刈谷真
Owner FUTABA CORPORATION