JPS60131745A - Color fluorescent display tube - Google Patents

Abstract

PURPOSE:To enable the density of the picture element of a color fluorescent display tube to be increased by arranging anodes coated with R, G and B phosphor layers in given repetitive orders along the lines and rows and using three anodes having different emission colors to form each picture element. CONSTITUTION:Anodes a11-amn are arranged in a matrix form along the lines and rows. On the anodes (a), R, G and B phosphor layers are fixed in given repetitive orders. Each control electrode (G) is installed facing two rows of anodes (a). Anodes (a) of each line coated with phosphor layers of the same color are connected together by means of each common wiring conductor (C) before being led outside the color fluorescent display tube. Each picture element consists of three anodes (a) having different emission colors. Color display is performed by simultaneously applying display signals to the anodes (a) by scanning the control electrodes (G). Owing to the above constitution, it is possible to narrow the pitch of the arrangement of the anodes (a) by reducing the influence of a negative electric field produced by the control electrodes (G).

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of narrowing the arrangement interval of the three segmented poles forming one pixel when displaying a color display, and is capable of achieving high quality display of ≧2 high-quality display without display half-display, etc. This is related to the color fluorescent display tube ratio that is possible.

In the field of fluorescent display tubes, display formats are diversifying as the field of use for fluorescent display tubes expands.

Among these, matrix-type display devices in which a plurality of segmented anodes are arranged in a matrix in the row and column directions are capable of displaying arbitrary characters, figures, etc.

It is expected that it will be developed in the future as a display terminal for various electronic devices and as a flat type display device to replace cathode ray tubes.

・However, there are some problems that need to be solved when using fluorescent display tubes to construct a matrix display device. For example, in this type of fluorescent display tube, it is difficult to select the row of anodes that should emit light. In order to ``in each row of anodes''
The problem is that the negative electric field created by the control electrode adjacent to the control electrode that is adjacent to the control electrode that is set in selection 3, bends the flight path of the electrons. As a result, a region where electrons do not strike, that is, a display area is generated at the end of the anode where one light emission is to be made, and this phenomenon becomes a problem particularly when attempting to increase the density of the anode.

In addition, in general, this kind of fluorescent display tube has a high-intensity drive system that has been successfully adopted. , table φ vine density 7
In order to achieve , the number of arrays of anodes, ! ＆、、If there are many cases, 2、So.

As a result, the number of control electrodes is also large, which is advantageous.1. The selected period of each control electrode during one cycle of the display.

The so-called duty factor becomes smaller.

Therefore, the selection time for each row of anodes becomes shorter, and the luminance of the emitted light decreases, so to compensate for the decrease in luminance,
It becomes necessary to set the drive voltage high.

In order to solve some of these problems, the present applicant has filed Japanese Patent Application No. 56-86785 (Japanese Patent Application Laid-Open No. 57-202050).
Water pipe 1 is proposed.

FIG. 1 is a schematic diagram showing an electrode connection structure of a fluorescent display tube proposed by the applicant mentioned above. Here, 1 in the figure indicates the anode part of the fluorescent display tube, and this anode part 1 is m x
n segmented anodes (α1.~(12-
+n) are arranged in a matrix of m rows and n columns. A phosphor layer is coated on each anode mountain, and every two anodes α arranged in the same row are connected in common to the wiring conductor C of each row.
1 to C3. Further, one square control electrode 'G (G'+ to C;) is disposed facing two rows of anode sections.

Although not shown, above the control electrode G is a filament-shaped cathode that emits electrons when heated.
One or more electrodes are strung together, and each of these electrodes is housed in a vacuum container to form a fluorescent display tube.

Therefore, in the electrode structure described above, the control electrode G is
The control electrode drive circuit 3 scans two adjacent molds %G simultaneously and while shifting them one by one.

y, that is, control/control pole q・1. : and G2゜G2 k G
3 N...Gk-1 and Gk (The control electrodes G1 and GK located at both ends are driven individually. Alternatively, the control electrodes G1 and G3 are simultaneously driven to connect the first row and n
The anodes ω of the rows may be scanned at the same time, and in synchronization with this scanning, the anodes α of the two rows located inside facing each other of the adjacent control electrodes G scanned at the same time are scanned simultaneously. , a display signal is provided by an anode drive circuit 2 to perform display. , □ In a fluorescent display tube with this structure, the number of anode wiring conductors is twice as large as 01 to C3 compared to a normal matrix type fluorescent display tube, but on the other hand, the number of control electrodes G is only half. , when the control electrodes G are driven by a dynamic method in which they are sequentially scanned, the display duty factor can be twice that of the conventional method.

In other words, if driven with the same anode voltage of the peak value, the fluorescent display tube with the structure shown in FIG. , it becomes possible to lower the anode voltage.
Furthermore, in a fluorescent display tube having this structure, two adjacent control electrodes G are simultaneously scanned, and display signals are given to two inner rows of anodes α'' facing each other. Therefore, the problem of 1 display does not occur at all, and the arrangement interval of the anodes a can be narrowed, and a high quality display can be obtained. teeth.

Problems with conventional matrix-type fluorescent display tubes□
It has an excellent structure that solves several problems.

On the other hand, in the field of display devices, rather than just displaying arbitrary figures, characters, etc., color display is used to increase the amount of displayed information, or to improve display effects and make the display easier to see. Increasingly, there is a demand for In particular, for display devices used as display terminals for various measuring instruments and computers, there is a strong demand for colorization, and it is desired to realize a display device capable of so-called color graphic display.

Therefore, as a result of various studies in order to achieve a color display for the matrix-type fluorescent display tube proposed by the applicant as shown in FIG. It was discovered that by devising the arrangement of the phosphor layer that emits light in each color and the pixel arrangement, it is possible to narrow the spacing between the three anodes that make up each pixel, thereby reducing the distance between each pixel, or the so-called pixel pitch. This led to the invention.

That is, in order to achieve the above-mentioned object, the color fluorescent display tube of the present invention has a plurality of anodes arranged in a matrix, and one control electrode is arranged facing each other in each two rows, and two adjacent control electrodes are arranged facing each other. A fluorescent method that obtains a display by simultaneously scanning the control electrodes while shifting them one by one, and in synchronization with the scanning, applying a display signal to the anodes in adjacent rows included in each of the adjacent control electrodes. In the display tube, two anodes that are adjacent to each other in the same row of the anode array and are included in different control electrodes, and two anodes that are in the row adjacent to the row of these two anodes. One pixel consists of one of the anodes and one anode located in the same row, and each pixel has three anodes with different luminescent colors from the phosphor layer deposited on the top surface of each anode. It is what it is.

Hereinafter, one embodiment of a color fluorescent surface water pipe according to the present invention will be described with reference to the drawings.

FIG. 2 is a diagram for explaining the electrode connection structure of the anode section 20 showing an embodiment of the color fluorescent display tube according to the present invention. The wiring structure of the anode itself and the arrangement structure of the control electrodes are basically the same as those of the matrix-type fluorescent display tube shown in FIG. 1 described above.

That is, a plurality of segmented anodes ((Lll
~α−n) are arranged in a matrix in the row and column directions.

On each of these anodes, there is a phosphor layer that emits red light due to the impact of electrons, a phosphor layer that emits green light, and a phosphor layer that emits blue light (hereinafter referred to as R phosphor layer, Gg & phosphor layer, B phosphor layers) are deposited in a predetermined repeating order. The arrangement structure of each phosphor layer is one of the gist of the present application, and first, the R phosphor layer, the G phosphor layer, and the B phosphor layer are deposited in a fixed repeating order in the row direction of the anode α. do. (
The illustrated embodiment is an R, G, B arrangement;
It may be R, B or B, G, R, etc.

It is sufficient if the order of repeating the arrangement is constant.) Similarly, when the anode α is struck in the column direction, as shown in the illustrated embodiment, R
, B, G in the repeating order, or G, R1'B or B,
The R phosphor layer, the G phosphor layer and the B phosphor layer are deposited in a certain repeating order of G, R, etc. In addition, anode 1 of each row
is an anode α coated with a phosphor layer of l1l11-emitting color.
Connect each other with wiring conductor C (CI+, ctz...C+a
3) to connect them in common and lead them out to the outside. This results in three placement wire conductors for each row.

Further, in this case, the anode 1 and the deposition of the phosphor layer on its upper surface and the wiring conductor may be formed using the well-known "thick film printing technique" or the fine pattern forming technique using photolithography. It is also possible to form the wiring conductor C through the gap between each anode C without using a crossover layer of insulation between the wirings by using a technique.

Then, for every two rows of deposited anodes of the phosphor layer, -
Control type -G (G+, Gz to GK) are arranged facing each other. Furthermore, although not shown in the figure, a plurality of cement-like cathodes that emit electrons when heated are suspended above the control electrode G, and each of the above-mentioned electrodes is connected to the The point is that the interior is evacuated to a high vacuum state and used as a fluorescent display tube.

This is similar to the fluorescent display tube shown in FIG. 1 described above.

By the way, when displaying in color, the required color tone is obtained by combining the respective phosphor layers that emit light in R, G, and H. Therefore, one pixel for color display is constituted by a set of three anodes α on which the R phosphor layer, the G phosphor layer, and the B phosphor layer are deposited.

The color fluorescent display tube of the present invention has one feature in this pixel arrangement structure. That is, the pixels P are adjacent to each other in the same row of the array of anodes α, and two positive electrodes included in each of two adjacent control electrodes are adjacent to the row of these two anodes Φ. One pixel is constituted by one of the two anodes α in a row and one anode in the same column. Furthermore, the phosphor layers deposited on the three anodes σ constituting one pixel emit light of different colors. Each pixel P in the case of the arrangement order of the R, G, and B phosphor layers of this embodiment is shown surrounded by a broken line. As is clear from FIG. 2, the anodes constituting the pixels P in the color fluorescent display tube of the present invention are arranged at the vertices of a square.

Therefore, the phases of the three-color anodes α constituting each pixel and the distances between the tiles are approximately equal and close to each other, so two or three anodes α are emitted to produce a mixture of colors. When obtaining , the desired color tone will be obtained. Also,
Since the anodes α constituting each pixel P4 are arranged close to each other, the pixel pitch can be reduced as a result. , .

Next, a method of displaying the above structure will be explained with reference to FIGS. 3 and 44.・.

As mentioned above, the three anodes α constituting one pixel of the color fluorescent display tube of the present invention have different control electrodes G or different arrangements, and are shown surrounded by broken lines in FIG. As shown in the figure, two pixels, or elements P, are constructed using three rows of the array of anodes α, and three pixels are constructed using the right column.

On the other hand, in the fluorescent display tube having the above-mentioned electrode structure, the control electrodes G at adjacent knees are driven at the same time and shifted by - pieces, and in synchronization with this, the two selected control electrodes G are driven.
The system is driven by applying a display signal to two anodes α located on adjacent sides of the anode. Therefore, each pixel P (P++, , Plz...P23) is taken as shown in FIG. 3, and the wire conductor C, (, C++ -ct
z...Cg3. ) is also taken as shown.

The timing ratio of the drive is as follows.

□1 First, the control electrode G receives a drive timing command signal from the display control unit 11, and then, via the control electrode drive circuit 12, performs the control electrode G as shown in FIG.・、Cq+
) are sequentially driven and driven as follows. , the display signal power 1 for the pixel-column is stored. Of course, this stored display signal includes pixel position information and color information. And, at the time of temporary memory, 13. Then, the stored signal is sent to the anode selection circuit 14 to select which wiring stop C is to be turned on (to cause the phosphor layer to emit light), and the anode drive circuit 15
．． A drive signal is applied to the selected and mature wiring conductor C via the . .

Further, the temporary storage circuit 1.3 and the anode selection circuit 14 are
The operation timing is controlled in response to a control signal from the display control section 11.

If the above-mentioned operation timing is shown, 4.1! ! 4. First, in one period T1, 1. Control electrode G1. Gl is scanned simultaneously, pixels pa+ and P
It is in the display period of I2. , pixel here! ++ is composed of an anode α connected to wiring conductors C'll, ctz, C21, and one pixel P2+ is composed of wiring conductors C2z, C311, C
The pixel 1 . , P21 are reddish-purple and green, in the T-th period, the color information of (Ca+), , (C21) and (C31
), only the wiring conductors CIl, C2 (, C31) are driven by Σ.

For the pixel P1+, the anode α on which the q outer phosphor layer and the B phosphor layer are deposited emits light, and for the pixel Pzl.

The anode α on which the G phosphor layer is deposited emits light as shown by diagonal lines. , - Next, in period T2, control electrodes G2 and G3 are first
are scanned simultaneously. This corridor switching, synchronized with Le,
The temporary storage circuit 13 stores the signal in the next pixel column (P12, Pa1). Then, this display signal causes a yellow flash for pixel P+2 and 5, and also causes a yellow flash for pixel pzz.
If color emission is specified, Fig. 4 (Cu), (C
As shown in 23), (C), and (C33), two driving signals are applied to the wiring conductor C connected to the visible anode of these phosphor layers to emit light in a desired color. is obtained. , Similarly, in the next display period T3, the pixel P is 4.
The pixel p23 emits white light in the negative blue direction.・In other words, in this structure, the display of one pixel is the control section;
Select in − scans without spanning multiple scans of
Therefore, the R light colors are mixed very well, and a high quality color display can be obtained. Anode α that also emits one light
Since the control electrode adjacent to the anode a is always kept at a positive potential, there is no problem of over-display, and on the contrary, it is possible to reduce the anode pitch in the row direction of the anode arrangement.

Furthermore, since two rows of anodes emit light simultaneously with one scan of the control electrode G, this is advantageous in terms of increasing the duty factor.

By the way, in the second implementation shown in Figure 3, the anode α was segmented into one rectangular shape, but the shape of this anode a is! It is of course possible to select any shape such as circular, triangular, trapezoidal, etc.

Furthermore, the arrangement structure of the anodes α in the 6th row direction and the 6th column direction is narrowed, and the arrangement structure of the anodes α is shown in FIG. The shape of the ment is made into a triangular shape □μ with the woman of the dipping example, and it is placed on the i side of each anode α,
-It has a structure in which every other row is shifted by half a pitch in a zigzag pattern. According to this structure, one pixel P
Since the anodes constituting the can be arranged in a substantially equilateral triangular shape and close to each other, higher density can be achieved.

Moreover, in this case, even if a part of the anode α is arranged to protrude from the control electrodes Gi and Gi↑1 as shown in FIG. 6, the control electrodes Gi and Gi+t are scanned at the same time, so there is no possibility that the display will be half-filled. Not at all.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but may be modified in various ways without changing the gist thereof.

As mentioned above, the i-color fluorescent and display tubes are made using two push-cuts.
The R′ phosphor layer, the G phosphor □ layer, and the B phosphor layer are arranged in a fixed repeating order in the row and column directions, and in each row of the arrangement, a phosphor layer of the same luminescent color □ is deposited. two anodes that are adjacent to each other in the same row of the anode array and included in each of two adjacent control electrodes; One pixel is composed of one of the two anodes in the adjacent row and one anode in the same column. and,
One control electrode is arranged separately across two rows of anodes, and the control electrodes are scanned two at a time and shifted one by one to cause electrons to strike the anode from the cathode, producing a color display. Therefore, the non-driven control electrode makes a negative light-emitting anode! Since there is no influence from the field, it is possible to narrow the arrangement pitch of the anodes constituting each pixel. This means that the pitch of each pixel can be reduced, and has the advantage of making it possible to achieve a high pixel density.゛ ′Furthermore, the anode that makes up each pixel is almost triangular.

Since the distances between the anodes are approximately equal in any combination of anodes, and one pole constituting one pixel is selected at the same time, JI! The light colors are mixed very well and the quality of the display can be improved.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the electrode structure of a fluorescent display tube which is the source of the color fluorescent display tube of the present invention, and FIG. 2 shows the electrode structure of an embodiment of the color fluorescent display tube according to the present invention. Figures 3 and 4 are diagrams for explaining the operation of the same embodiment, and Figures 5 and 6 are electrode structure diagrams showing another embodiment of the color fluorescent display tube according to the present invention. be. α... Anode C... Wiring conductor P...
Pixel □, 120°°°°°! Extreme ■□"'B □'; ,, , Same patent applicant Futaba Electronics Co., Ltd. Figure 1 Figure 2 P Figure 5 Figure 6

Claims (1)

[Claims] , (1,) A plurality of segmented anodes are arranged in a matrix in the row and column directions, and each anode in one row, direction, and column direction emits red light on its upper surface. A phosphor layer, a green-emitting phosphor layer, and a blue-emitting phosphor layer are deposited in a certain repeating order, and the anodes on which phosphor layers of the same luminescent color are deposited in each row are commonly connected. 1. Anode portions are arranged facing each other in every two rows of the anode array. two anodes that are located in the same row of the anode array, are adjacent to each other, and each face a different control electrode; It is composed of two rows of anodes and one anode located in the same column as one of the two anodes in the adjacent row, and the luminescence of the phosphor layer deposited on the top surface of each. A color fluorescent display tube in which one pixel consists of three anodes of different colors. (2) The color quantity light according to claim 1', wherein each of the anodes is arrayed in a zigzag pattern with rows shifted by half a pitch from one blue to the other in the row direction arrangement. 'Display tube □