JPH0316734B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, electrons emitted from a cathode are controlled and selected by a control electrode for a group of anode pieces arranged in a matrix with a phosphor layer deposited on the upper surface. The present invention relates to a fluorescent display device that causes anode pieces to emit light by colliding with a group of anode pieces, and is particularly applicable to a fluorescent display device that improves the wiring process and assembly work of a control electrode disposed facing a group of anode pieces. It is related.

Conventionally, a large number of dot-shaped anode pieces coated with a phosphor layer are arranged in a matrix in the vertical and horizontal directions (column and row directions), and electrons from the cathode are selectively directed to the dot-shaped anode pieces using control electrodes. A fluorescent display tube as shown in FIG. 1A has been widely used as a fluorescent display tube that displays arbitrary figures, characters, symbols, etc. by emitting light by being hit by a fluorescent display tube.

In the figure, a large number of anode pieces 1 are arranged in a matrix in the vertical and horizontal directions, and each row in the horizontal direction is commonly connected by an anode wiring conductor 2, and above a group of anode pieces, Grid-like control electrodes 3 are arranged to face each other in each column in the vertical direction.

In the above-mentioned fluorescent display device, a dynamic drive method is generally adopted, and when a scanning signal is applied to the control electrode 3, only a group of anode pieces in the column direction covered by the control electrode can emit light. On the other hand, a display signal is supplied through the anode wiring conductor 2 to each group of anode pieces arranged in the row direction in synchronization with the scanning signal. At this time, only the anode pieces to which the scanning signal and the display signal are simultaneously supplied emit light as pixels.

By the way, in the above-mentioned conventional technology, since the entire surface of a row of anode pieces must be covered by the grid-like control electrode, the width dimension of the control electrode is larger than that of the anode pieces, and the adjacent The drawback is that the anode strips cannot be arranged in a high density, and it is difficult to obtain a satisfactory resolution due to the influence of the control electrodes on the row of anode strips that cause obscuring of the display. It was hot.

As a solution to this problem, Figure 1 B
It has been proposed to employ a wire-shaped control electrode as shown in FIG. That is, the structure is such that striped anodes 4 are arranged in the row direction, and wire-shaped control electrodes 5 are provided in the column direction intersecting the striped anodes. Then, by selecting the striped anode 4 and applying a display signal, and simultaneously selecting two adjacent wire-shaped control electrodes 5 and applying a scanning signal, the striped anode 4 is surrounded by the two control electrodes 5. Electrons are made to strike the anode 6 (the shaded area in the figure) in the shaded area, causing this area to emit light.

According to the above technology, the anode is divided by a wire-shaped control electrode, and this divided area becomes a pixel as it is, and does not take up any extra space, resulting in high pixel density and no shadowing. However, if this method were to be used to create a display device that extends in the horizontal direction (row direction) like the Lightning News, the number of wire-shaped control electrodes would be enormous, making the assembly process of the control electrodes extremely difficult. This has disadvantages in that it becomes complicated and the wiring process becomes extremely complicated, and furthermore, it has the disadvantage that the scanning signal generation circuit becomes large-scale.

The purpose of the present invention is to solve problems such as the ease of assembly of control electrodes and the complexity of wiring thereof due to structural limitations of the fluorescent display device based on the prior art.
By adopting a configuration employing a control electrode frame, the above-mentioned drawbacks and disadvantages are eliminated, and an excellent fluorescent display device with high resolution for display elements extending long in the row direction is provided.

The structure of the present invention in accordance with the above object is to lay two anode wiring conductors for each row of anode pieces arranged in a matrix, divide the anode pieces in each row into two, and connect every other one in common. By arranging control electrodes above every other row of the anode strip group, a control electrode frame is formed, which changes the wiring burden, doubling the number of anode wires and halving the number of control electrode wires. The gist of the present invention is to prevent the control electrode wiring from increasing in scale in a display device which extends long in the row direction.

Next, an embodiment of the present invention will be described below based on the drawings from FIG. 2 onwards.

As shown in FIG. 2, the anode pieces a are arranged in a matrix in the horizontal direction (row direction) and the vertical direction (column direction), and the anode pieces a in each row are connected to two anode wiring conductors 10. , 11, every other row (one piece) is commonly connected. That is, the anode pieces a ₁ , a ₃ ,
_a5 ,... are connected to the anode pieces _a2 ,... by the anode wiring conductor 10,
a ₄ , a ₆ , . . . are connected to each other by an anode wiring conductor 11. The two anode wiring conductors 10 and 11 are to be driven while maintaining a complementary relationship.
It is connected to the anode driver section 12.

On the other hand, control electrodes g are arranged above between each row of anode pieces a, and the control electrodes g are formed in a control electrode frame using a pair of two adjacent wires, and control electrode wiring It is connected to a control electrode driver section 15 by a conductor 14 . In addition, 16 is a cathode arranged above the control electrode g, and 17
is the cathode power source.

As shown in FIG. 3, a phosphor layer 18 is deposited on the anode pieces a, and each anode piece a is connected to the anode wiring conductors 10 and 11 through a through hole. 19 is an insulating layer, 20 is a substrate, and 21 is a container portion.

FIG. 4 is a time chart of the scanning signal applied to the control electrode frame and the display signal applied to the anode group, where 22 and 23 are the control electrode frames g ₁ , g ₂ , . . . , respectively.
Reference numerals 24 and 25 indicate the emission voltage and blocking voltage applied to the anode pieces a ₁ , a ₂ , . . . , respectively.

Next, regarding the operation of making each anode piece a emit light,
This will be explained using the time chart in FIG. 4 and the operation diagram in FIG. 5.

The state of time _slot T ₂ in FIG. ₄ is shown in FIG.
... are applied with light emitting voltages 24a ₂ , 24a ₄ , ..., and the anode pieces connected to the anode wiring conductor 10 are driven by display signals that are complementary to these.
A blocking voltage is applied to a ₁ , a ₃ , . . . , and no light is emitted regardless of the scanning signal of the control electrode frame g. Then, in the time slot _T2 ,
The light emission voltages 22g ₁ and 22g 2 are applied only to the control electrode frame g ₁ and the control electrode frame g ₂ adjacent thereto, and the blocking voltage _{23 is applied to the other control electrode frames g 3 ,} .
g ₃ ,... are applied.

Therefore, as shown in FIG. 5A, regarding the anode piece a ₂ to which the emission voltage 24a ₂ is applied, the control electrode frames located on both sides thereof and to which the emission voltages 22g ₁ and 22g ₂ are applied The electron e is accelerated by g ₁ and g ₂ and collides, causing it to emit light. On the other hand, regarding the anode piece _a4 to which the light emitting voltage _24a4 is applied at the same time as the anode piece _a2 , the negative electric field created by the adjacent anode piece _a3 and the control electrode frame _g3 affects the anode piece _a4 . The electrons e heading toward are repelled and do not collide, so the anode piece _a4 does not emit light. Also, at this time, the anode pieces a ₁ ,
As for a ₃ , the electrons e that have passed through the control electrode frames g ₁ and g ₂ head towards it, but since blocking voltages 25a ₁ and 25a ₃ are applied to the anode pieces a ₁ and a ₃ , these The electrons are repelled by the negative electric field created by the anodes, and do not collide with these anode pieces.

Similarly, the state of time slot _T3 in FIG. 4 is shown in FIG. 5B, and the anode wiring conductor 1
A positive potential is applied to 0, and the anode piece connected to this
A light emitting voltage is applied to a ₁ , a ₃ , ..., and on the other hand, at this time, the anode wiring conductor 1 kept at a negative potential
The blocking voltage 2 is applied to the anode pieces a ₂ , a ₄ , ... connected to 1.
5a ₂ and 25a ₄ are applied. In the time slot _T3 , a light emission voltage _22g2 is applied only to the control electrode frame _g2 , and a blocking voltage is applied to the control electrode frames _g1 and _g3 adjacent on both sides. There is.

Therefore, as shown in FIG. 5B, regarding the anode piece _a3 to which the light emitting voltage 24a3 is applied, the electrons e are accelerated by the control electrode frame _g2 facing the anode piece _a3 and collide with it. to emit light. On the other hand, the anode piece
Regarding the anode piece _a1 to which a light emitting voltage is applied in the same way as _a3 , a blocking voltage _23g1 is applied to the control electrode frame _g1 facing the anode piece a1, and the negative electric field created by this anode piece a1 causes electrons e to is repelled and no electrons strike the anode piece a ₁ , so the anode piece a ₁ does not emit light.

Also, at this time, a negative electric field is formed on the anode pieces a ₂ and a ₄ to which the blocking voltages 25a ₂ and 25a ₄ are applied, and the electrons e are repelled and do not collide. One side a ₂ and a ₄ do not emit light.

As described above, in the present invention, the control electrode frames g ₁ , g ₂ , ..., gn+1/2 are scanned at a constant cycle, and the images are displayed on the anode pieces a ₁ , a ₂ , ..., a _o in synchronization with this. As shown in FIG. 2, the control electrode frame is provided on every other row of anode pieces, and two adjacent control electrode frames form a pair. supply a scanning signal to
On the other hand, the anode strip group in each row is divided into two every other column, and display signals complementary to each other are applied to each half through the anode driver section 12.

That is, as shown in FIG. 4, in the time slot _T1 , the light emission voltage _22g1 is applied only to the control electrode frame _g1 , and during this time, the anodes in the row to which the anode pieces _a1 , _a3 , ... belong By applying a light-emitting voltage or a blocking voltage to the anode wiring conductor 10 to which the group of pieces is connected in accordance with a display signal, the anode piece a ₁ is controlled to emit or not emit light.

Similarly, at this time, other anode wiring conductor 1
According to each of the other display signals that are simultaneously applied to 0', ₁₀ '',... It will be done.

In the next time slot _T2 , the control electrode frame _g1 ,
Light emitting voltages 22g ₁ and 22g ₂ are simultaneously applied to g ₂ to control whether or not the anode strip group in the column to which anode strip a ₂ belongs is emitted, and at time slot T ₃ ,
The light emitting voltage _22g2 is applied only to the control electrode frame _g2 to control whether the anode strip group in the column to which the anode strip _a3 belongs is emitted or not.

Regarding the control electrode g, although a pair of wire-shaped electrodes constituted as a frame has been illustrated and explained, the present invention is not limited to this, and as shown in FIG. 6A, two adjacent The wire-shaped control electrode g may be connected by a wiring 27, and further,
As shown in FIG. 6B, a pair of adjacent control electrodes g are connected at both ends to form an electrode frame, which is then connected between each row of anode strip groups a ₁ , a ₂ , a ₃ . By connecting each separately above the electrodes to form a ladder-like electrode,
Mechanical strength may be increased.

Further, the substrate 20 and the anode piece a in FIG. It is optional to apply the structure of the present invention to a fluorescent display device in which the control electrode g partially or completely covers the light emitting surface of the anode piece group. There is no problem with the display observed from the back side of the
As in the embodiment shown in FIG.
It is not necessary to arrange the anodes above the rows of the anode pieces a to avoid the light emitting surface of the anode pieces a. In other words, in this case, it is sufficient that the control electrodes g are arranged facing each other above the anode pieces corresponding to every other row of the anode pieces a group, so there are no restrictions on the placement location and shape of the control electrodes g. There is a practical benefit in that the situation is significantly alleviated.

As described above, according to the present invention, in a fluorescent display device in which anode strip groups are arranged in a matrix in the row and column directions, the anode strip groups in each row are connected every other column by two anode wiring conductors. By dividing the anode strips into two and making a common connection, and by arranging the control electrodes facing each other above every other row of the anode strip group, the ratio of wiring burden between the anode wiring and the control electrode wiring can be changed, and the anode wiring side can be divided into two.
On the other hand, the control electrode wiring side was halved, which is the biggest challenge in display devices that extend long in the row direction (horizontal direction), which has recently become a growing demand, such as in lightning news. This has the excellent effect of preventing the electrode wiring from increasing in scale and halving the number of wirings to the control electrodes.

Furthermore, the complexity of the control electrode assembly work can be eliminated, and furthermore, it is possible to suppress the increase in the size of the scanning signal generation circuit due to the increase in the number of control electrode wirings, thus contributing to the practical use of the horizontally extending display device. It's a big deal.

In this case, the number of anode wires is doubled, but once the vertical length of the display device is determined, the number of anode wires is also determined by itself, and the length in the vertical direction is shorter than the length in the horizontal direction. Since the wiring burden is originally very small, the increase in wiring burden in this direction is not a problem compared to the wiring burden in the horizontal direction, and the practical benefit of halving this in the horizontal direction, where the wiring burden is greater. is extremely large.

In this way, by reducing the scale of the control electrode wiring, it is possible to arrange the anode pieces serving as pixels at a high density in a display device that extends long in the row direction, so that a display device with good resolution can be realized.

[Brief explanation of drawings]

Both FIGS. 1A and 1B show conventional examples, and FIGS. 2 and below show embodiments of the present invention.
3 is a sectional view, FIG. 4 is a time chart of scanning signals and display signals, FIGS. 5A and 5B are operation explanatory diagrams, and FIGS. 6A and 6B are other embodiments. a... Anode piece, g... Control electrode, 10, 11...
...Anode wiring conductor, 14...Control electrode wiring conductor, 1
6... Cathode, 18... Phosphor layer, 22g... Control electrode light emission voltage, 23g... Control electrode blocking voltage, 2
4a...Anodic emission voltage, 25a...Anodic blocking voltage.

Claims (1)

[Claims] 1. Electrons emitted from the cathode 16 are controlled by a control electrode g to selectively strike a group of anode pieces a arranged in a matrix in the row and column directions. By this, in a fluorescent display device in which the anode pieces emit light, each anode piece group in each row of the anode piece a group
a ₁ , a ₂ , a ₃ ... a _o is divided into two every other row, and a first group of anode pieces a ₁ , a ₃ , a ₅ ... and a second group of anode pieces
a ₂ , a ₄ , a ₆ ... are formed, and the first anode piece groups are commonly connected by the first anode wiring conductor 10,
The second anode piece group is connected to the second anode wiring conductor 11
The control electrodes g, g ₁ , g ₂ ,
g _{3 .} . . is a fluorescent display device characterized in that the anode pieces a are arranged facing each other in correspondence with and above every other row of the group a. 2. The control electrodes g, g ₁ , g ₂ , g ₃ . . . are individually arranged above between each row of anode strip groups a ₁ , a ₂ , a ₃ . 2. The fluorescent display device according to claim 1, wherein the control electrodes are commonly connected at both ends thereof to form a control electrode frame. 3. The fluorescent display device according to claim 1, wherein each of the control electrodes (g) is made up of a wire, and a pair of adjacent wires are commonly connected at both ends to form a control electrode frame. 4 The control electrode frame includes anode pieces groups a ₁ , a ₂ , a ₃ . . .
3. The fluorescent display device according to claim 2, wherein the fluorescent display device is connected above between each row to form a ladder shape.