JP4964478B2 - Color fluorescent display tube - Google Patents

Description

  The present invention relates to a color fluorescent display tube, and more particularly to a pixel structure of a fluorescent display surface for full color display.

As a self-luminous display element that displays predetermined pattern information or graphic information on a display unit such as an audio, home appliance, measuring instrument, or medical device, a color fluorescent display tube that can emit multicolor light is widely used. The color fluorescent display tube emits light by irradiating a fluorescent display surface formed on an anode substrate with a low-speed electron beam generated from a cathode.
On the other hand, the display surfaces of full color display in each display device such as a plasma display device (PDP), a liquid crystal display device (LCD), and an electroluminescence display device (EL) are red (R), green (G), and blue (B ) Square units or circular units are arranged at equal intervals to form one pixel, and these are arranged in the vertical and horizontal directions (see, for example, Patent Document 1).
However, if full color display of a fluorescent display tube is performed using such a color display surface, the pixel density that can be achieved by the technology of the fluorescent display tube, the limitations on the phosphors that can be used, and the device using the display device Due to the difference in the viewing distance due to the fluorescent display tube, it may be difficult to perform light emission of the intermediate color in the fluorescent display tube.

  For example, in a fluorescent display tube, as shown in FIG. 4, one pixel 1 ′ constituting a display surface is made into two rectangles of green light emission and orange light emission arranged vertically, and each pixel is vertically and horizontally oriented. Assume that they are arranged. In this pixel structure, if the control electrode is sequentially scanned and a display signal is given to each light emitting unit at an appropriate timing, an arbitrary character / image is displayed on the horizontally long display surface with green light emission and orange light emission. It can be displayed in three colors, mixed color light emission, and can be scrolled in any direction. However, in this case, if an attempt is made to display a line that emits only green light or orange light, the vertical and diagonal lines become missing and discontinuous compared to the horizontal lines. In order to solve this problem, as shown in FIG. 5, each pixel 1 ″ is a rectangle, each light emitting unit is a triangle obtained by dividing each pixel along a diagonal line, and the light emission color in two adjacent pixels. There is known a pixel structure in which two light emitting units having the same value face each other at one vertex (see Patent Document 2).

However, in the case of this pixel structure, although the display quality of the two-color fluorescent display tube is improved, full-dot multi-color display is difficult. In addition, when trying to display a horizontal line of a single color, a part of the triangle divided along the diagonal line becomes a missing dot, and the display quality is higher than that of a conventional fluorescent display tube in which one pixel is composed of two rectangles. There was also a problem of being inferior.
JP-A-2-189845 Patent No. 3063637

  The present invention has been made in order to cope with such problems, and an object of the present invention is to provide a color fluorescent display tube capable of full dot multi-color display excellent in intermediate color display quality due to color mixture of light emission colors.

The color fluorescent display tube of the present invention is a color fluorescent display tube that emits the fluorescent display surface by irradiating the fluorescent display surface formed on the anode substrate with a low-speed electron beam generated from the cathode. A single pixel that is a combination of R (red), G (green), and B (blue) phosphor units is arranged in the vertical and horizontal directions, and the phosphor units are a combination of two types of polygons having different planar shapes. Ri name is configured,
Two of the phosphor units are arranged as a symmetrical polygon, and the other one of the phosphor units is arranged as another polygon above the arranged symmetrical polygon,
The left-right symmetrical polygon is a right-angled trapezoid, and the short sides of the right-angled trapezoid are arranged to face each other, and the other polygon is arranged as a trapezoid or a triangle.
In the one pixel, one side of the polygon is arranged adjacent to one side of another polygon of a different color.
Further, one side of two kinds of polygons having different planar shapes constituting the phosphor unit is arranged in parallel with one side of another polygon having a different color to constitute one pixel, and this one pixel is rectangular. Features.
Further, one side of one pixel in which the phosphor units are combined is arranged in parallel in the vertical and horizontal directions with one side of another pixel of a different color.

Since the color fluorescent display tube of the present invention is composed of a combination of two types of polygons having different planar shapes, one pixel combining R (red), G (green), and B (blue) phosphor units. In the phosphor display surface, the area filling rate of phosphor units and pixels can be increased, and the display quality is improved.
Further, in one square pixel, the phosphor units of R (red), G (green), and B (blue) are parallel to one side of another polygon in which two sides of two types of polygons having different planar shapes are different. Therefore, it is possible to enhance the color mixing effect of the emission color.

An example of the embodiment of the color fluorescent display tube of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a pixel structure of a fluorescent display surface, FIG. 2 is an enlarged view of the pixel, and FIG. 3 is a sectional view of a color fluorescent display tube.
As shown in FIG. 3, the color fluorescent display tube 12 is provided with an anode substrate 7, a grid 8 and a cathode 9 provided on the anode substrate 7, sealed with a face glass 10 and a spacer glass 11, and evacuated. Formed. The phosphors emit light by irradiating the fluorescent display surface 6 on the anode substrate 7 with the low speed electron beam generated from the cathode 9.

  In the case of a color fluorescent display tube capable of full-dot multicolor display, after forming the wiring layer 3 on the glass substrate 2 on the anode substrate 7, the insulating layer 4 is formed on almost the entire surface excluding the through holes not shown. The anode electrode 5 is electrically connected to the wiring layer 3 through the through hole, and the phosphor unit is formed on the anode electrode 5 to form the phosphor display surface 6. . A plurality of grids 8 are arranged above the phosphor unit, and a filamentary cathode 9 is stretched thereon. The electron source of the color fluorescent display tube is not limited to the filamentary cathode 9, and an electron source such as a field emission element can also be used.

As shown in FIG. 1, the fluorescent display surface 6 includes one pixel in which an R (red) phosphor unit 1a, a G (green) phosphor unit 1b, and a B (blue) phosphor unit 1c are combined. A plurality of 1s are arranged in the vertical and horizontal directions. The phosphor unit 1b and the phosphor unit 1c have the same planar shape and are arranged symmetrically on the left and right lines. The phosphor unit 1a has a different planar shape from the phosphor unit 1b and the phosphor unit 1c.
The phosphor unit constituting one pixel 1 is a polygon, preferably a square having four sides. If it is square, the pixel 1 itself can be square, and the area filling rate of the pixel can be increased.

In the present invention, as shown in FIGS. 2 and 3, a preferable phosphor unit and its arrangement are such that the phosphor unit 1b and the phosphor unit 1c are symmetrical right trapezoids, and the short sides of the right trapezoid are parallel to each other. The trapezoidal phosphor units 1a are arranged so as to face each other and have sides parallel to the oblique sides of the arranged right trapezoids. These phosphor units 1a, 1b and 1c form one pixel 1. The phosphor units 1a, 1b, and 1c have different display colors of the phosphors that emit light.
By arranging the trapezoidal phosphor units, one pixel 1 becomes square, and a fluorescent display surface 6 is formed as an aggregate of the pixels 1.

When arranging the pixels 1, the sides of one pixel are arranged side by side in the vertical and horizontal directions in parallel with the sides of other pixels of different colors. If this condition can be satisfied, one pixel 1 may not be square, rectangular, or parallelogram.
By arranging in this way, as indicated by arrows in FIG. 2, on the fluorescent display surface 6, for example, the phosphor unit 1 c is opposite to the phosphor units 1 a and 1 b that are arranged vertically and horizontally and have different display colors. Are adjacent to each other to establish a pixel relationship. This pixel relationship is also established for each phosphor unit 1a or 1b.

The pixel structure can be formed on each electrode by a known printing method or photolithography method. In the pixel structure, anode wiring is connected to each phosphor unit arranged in a matrix, and grid electrode wiring is connected to a plurality of grids corresponding to the phosphor units. In this pixel structure, multi-color display can be performed by sequentially scanning the control electrodes and applying a display signal to each light emitting unit of each pixel at an appropriate timing.
As described above, since the fluorescent display surface 6 of the present invention can arrange pixels closely, a high color mixing effect is obtained. By utilizing this color mixing effect, it is possible to display an arbitrary hue in the vertical, horizontal, and diagonal directions without any missing dots, so that the display quality is excellent.

  Since the color fluorescent display tube of the present invention can increase the area filling rate of the phosphor units and the pixels, the display quality is improved. Therefore, it can be used as a color fluorescent display tube capable of full-dot multi-color display that will require a more gorgeous color effect in the future.

It is a figure which shows the pixel structure of a fluorescence display surface. It is an enlarged view of a pixel. It is sectional drawing of a fluorescent display tube. It is a figure which shows the pixel structure of the conventional fluorescence display surface. It is a figure which shows the pixel structure of the conventional fluorescence display surface.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pixel 2 Glass substrate 3 Wiring layer 4 Insulating layer 5 Anode electrode 6 Fluorescent display surface 7 Anode substrate 8 Grid 9 Cathode 10 Face glass 11 Spacer glass 12 Color fluorescent display tube

Claims (4)

In a color fluorescent display tube that irradiates a fluorescent display surface formed on an anode substrate with a low-speed electron beam generated from a cathode and emits the fluorescent display surface,
The phosphor display surface is formed by combining three phosphor units of different colors of R, G, and B to form one pixel, and the one pixel is arranged in the vertical and horizontal directions, and the phosphor unit has a planar shape. Composed of a combination of two different types of polygons,
Two of the phosphor units are arranged as a symmetrical polygon, and the other one of the phosphor units is arranged as another polygon above the arranged symmetrical polygon,
The symmetrical polygon is a right trapezoid, and the short sides of the right trapezoid are arranged to face each other, and the other polygon is arranged as a trapezoid or a triangle,
The color fluorescent display tube according to claim 1, wherein one side of the polygon is disposed adjacent to one side of another polygon of a different color within the pixel.   2. The color fluorescent display tube according to claim 1, wherein one side of the polygon is arranged in parallel with one side of another polygon of a different color to constitute one pixel, and the one pixel is a square. One side of the polygon is arranged in parallel with one side of another polygon of a different color to form one pixel, and the one pixel is a square,
Two of the phosphor units are symmetric right and left trapezoids, and the short sides of the right trapezoids are arranged to face each other in parallel, and the remaining one of the phosphor units is the right trapezoid that is arranged. 2. The color fluorescent display tube according to claim 1, wherein the color fluorescent display tube is arranged as a trapezoid having sides parallel to each other. One side of the one pixel is arranged in parallel in the vertical and horizontal directions with one side of the other pixel, and the color of the phosphor unit constituting one side of the one pixel and the phosphor constituting one side of the other pixel The color fluorescent display tube according to any one of claims 1 to 3, wherein a unit color is different.

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