JP2548263Y2 - Multi-color display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a multicolor display device using a fluorescent display tube.

[0002]

2. Description of the Related Art As a conventional multicolor display device, for example, there is one as shown in FIG. In the figure, 1 is a sensor,
Reference numeral 2 denotes a microcomputer circuit (hereinafter abbreviated as CPU) for processing and outputting a signal detected by the sensor 1;
Is a color driver to which a display data signal is supplied from the CPU 2, 4 is a single-color (green) driver to which a display data signal is also supplied from the CPU 2, 5 is a battery, 6 is an ignition switch, 7 is a three-terminal circuit, 8
Is a DC / DC converter, 9 is a DC / DC converter 8
The filament power supply is supplied to the filament electrode 9f and the grid power supply V _AA is supplied to the grid electrode 9g.
Are connected to a color driver 3 and a multi-color driver 4.

Next, the operation will be described. Fluorescent display tube 9
Is supplied with a filament power supply and a grid power supply V _AA from the DC / DC converter 8, and display data generated by the CPU 2 is supplied to the segment electrode 9s via the color driver 3 or the monochromatic driver 4 to be displayed. . In this case, a dedicated display power generated by the DC / DC converter 8 is supplied to the color driver 3 and the single-color driver 4.

[0004]

However, in such a conventional multi-color display device, the voltage applied to the grid electrode 9g is common to the color display and the single-color display, and the fluorescent display is used. The upper limit (approximately 6
0 V), the color display luminance was relatively lower than the single-color display luminance. Therefore, the filter was made darker to increase the contrast of the segment electrode 9s between when illuminated and when it was not illuminated. However, there is a problem that the brightness of the color display is insufficient when trying to increase the brightness.

The present invention has been made to solve the above problems, and has as its object to obtain a multicolor display device in which the luminance of a color display is increased to improve the visibility.

[0006]

According to the present invention, there is provided a multicolor display device comprising: a fluorescent display tube having a filament electrode, a grid electrode, and a plurality of segment electrodes for emitting light for display;
A microcomputer circuit for supplying a display data signal to a plurality of display color segment electrodes via a color driver and a monochrome driver; and a DC for applying a voltage to each of the filament electrode, grid electrode, color driver and monochrome driver. / DC converter, wherein the grid electrode comprises a color grid electrode and a monochromatic grid electrode, and a voltage applied to the monochromatic grid electrode is lower than a voltage applied to the color grid electrode. A set DC / DC converter is provided.

[0007]

In the multicolor display device according to the present invention, the voltage applied from the DC / DC converter is made different for the color grid electrode and the single color grid electrode, and the voltage applied to the color grid electrode is changed to the single color grid electrode. Is set to be higher than the voltage applied to the pixel to increase the luminance of the color display.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a circuit diagram showing an embodiment of the present invention. In FIG. 1, the same or equivalent components as those in FIG. First, the configuration will be described. In the figure, reference numeral 10 denotes a grid electrode for color.
A voltage V _BB is applied from the DC / DC converter 8 to the color grid electrode 10. Reference numeral 11 denotes a single-color grid electrode, and the DC / D
The voltage V _AA is applied from the C converter 8. In addition,
The DC / DC converter 8 is set such that the voltage V _BB applied to the color grid electrode 10 is higher than the voltage V _AA applied to the single color grid electrode 11.

Next, the operation will be described. Fluorescent display tube 9
Is supplied with a filament power supply and a color grid power supply V _AA or a single color grid power supply V _BB from a DC / DC converter 8, and the display data generated by the CPU 2 is segmented via the color driver 3 or the single color driver 4. The data is supplied to the electrode 9s and displayed. In this case, the color driver 3 or the single-color driver 4 has D
An individual dedicated display power generated by the C / DC converter 8 is supplied.

[0010]

As described above, according to the present invention, the structure of the present invention is such that a fluorescent display tube having a filament electrode, a grid electrode, and a segment electrode for emitting a plurality of display colors, a display driver for a color driver and a monochrome display. A microcomputer circuit for supplying to any of the segment electrodes via a driver for the filament electrode,
In a multi-color display device including a grid electrode, a color driver, and a DC / DC converter for applying a voltage to each of a single-color driver, the grid electrode includes a color grid electrode and a single-color grid electrode, and The voltage applied to the grid electrode for color is set to be lower than the voltage applied to the grid electrode for color, so that the multicolor display device is characterized in that the luminance of the color display can be increased and the visibility can be improved. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a multi-color display device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an example of a conventional multicolor display device.

[Explanation of symbols]

 Reference Signs List 2 microcomputer circuit 3 driver for color 4 driver for single color 8 DC / DC converter 9 fluorescent display tube 10 grid electrode for color 11 grid electrode for single color

Claims (1)

(57) [Scope of request for utility model registration] 1. A fluorescent display tube 9 having a filament electrode, a grid electrode, and a segment electrode for emitting a plurality of display colors, and a display data signal is transmitted to one of the segment electrodes via a color driver 3 and a monochromatic driver 4. In a multi-color display device comprising a microcomputer circuit 2 for supplying and a DC / DC converter 8 for applying a voltage to each of the filament electrode, grid electrode, color driver and single-color driver, the grid electrode is used for color. consists grid electrode 10 and the monochromatic grid electrode 11, and the voltage applied to the single color grid electrode, multi, characterized by being configured by a circuit composed is set lower than the voltage applied to the grid electrode above color Color display device.