Title:
集積回路装置、蛍光表示管
Document Type and Number:
Japanese Patent JP6681859
Kind Code:
B2
Abstract:
To prevent a reduction in display quality due to luminance unevenness caused by variation of drive current between filaments.SOLUTION: An integrated circuit device pertaining to the present invention is equipped, as a drive channel for driving a filament, with a plurality of drive channels each outputting a filament drive voltage on the basis of a discrete control signal, the integrated circuit device including, for each drive channel, a plurality of output transistors for controlling the output of the drive voltage, each connected in parallel to the voltage source of the drive voltage, a drive voltage output terminal connected individually for each output transistor, and a detection transistor connected to the voltage source in parallel with the plurality of output transistors; and further including, for each drive channel, a control unit for exercising feedback control by adjusting the ON duty of the output transistors with regard to a current flowing in the filament connected to the drive voltage output terminal on the basis of the value of a current inputted via the detection transistor.SELECTED DRAWING: Figure 13
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| WO/1996/000434 | SIGNAL LEVEL INDICATOR AND ASSOCIATED METHOD |
Inventors:
Terukazu Sugimoto
Miyajima Akio
Miyajima Akio
Application Number:
JP2017184081A
Publication Date:
April 15, 2020
Filing Date:
September 25, 2017
Export Citation:
Assignee:
Futaba Electronics Co., Ltd.
International Classes:
G09G3/12; H01J31/15
Domestic Patent References:
| JP2014019300A | ||||
| JP2017044912A | ||||
| JP2011029615A | ||||
| JP2006202855A | ||||
| JP4145489A |
Attorney, Agent or Firm:
Masanobu Iwata
Hiroto Nakagawa
Hiroto Nakagawa