JPS5822754B2 - Eizohiyoujisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an X-
The present invention relates to a video display device using a Y-Marx display panel.

; The first diagram shows the configuration of a conventional X-Y matrix display panel.
As shown in the figure.

In FIG. 1, the X thin electrode is Xl. X2.・・・・・・
Xi...(i=1.2...), Y thin electrode Yl, ¥2...Y...(j=1
, 2...), and the light-emitting element point is indicated by P....

When performing television display using this rigid X-Y matrix panel, the number of resolution lines that can be displayed is determined by the number of electrodes; for example, in the NTSC system, the number of electrodes on the Y axis is approximately 640 for a black and white image; Approximately 480 electrodes are required, and the pitch between light-emitting element points, that is, the electrode pitch, must be made very small.

FIG. 2 is an enlarged view of FIG. 1, and for the purpose of color image display, fluorescent element points P11°P21. P31
It was coated on.

Therefore, the pitch between light-emitting element points when displaying a color image is a
Therefore, the pitch when displaying a monochrome image is b.

Therefore, when considered as a color television receiver, the number of electrodes is three times the above 640, and for example, in a panel with a diagonal length of 20 inches (50.8 cm), the pitch is 0.2 m.

Furthermore, the pitch becomes smaller for smaller inch panels.

Making a panel with such a small pitch is very difficult considering the area of the phosphor and the electrode line width.On the other hand, even if it were possible to make a panel with such a small pitch, it would be difficult to make a panel with such a small pitch. Therefore, the process of connecting the panel electrodes and the drive stages becomes very difficult.

Therefore, an object of the present invention is to provide an image display device that can reduce the number of drive circuits for incremental scanning.

FIG. 3 is a block diagram of the matrix display panel used in the present invention.

In the figure, electrode X1. X2・・・・・・and electrode￥
1. Y2... are the same as shown in FIG. 1, and potash P'11. P'21. P′31 are R, respectively.
A phosphor for G and B emission is shown.

The arrangement of the light emitting element points is as shown in Figure 3.
Using three electrodes, one set of R, G, and B is arranged in a roughly triangular configuration.
When six X electrodes are considered as one set, this is configured to be repeatedly arranged along the X electrodes.

That is, unlike a group of light-emitting element points constituted by a general XY matrix electrode, the structure is such that a light-emitting element point is arranged every other one.

In order to enable such arrangement of light-emitting elements, for example, in a gas discharge panel, holes 4-2 constituting the cells are bored in the intermediate sheet 4-1 and holes 4-2 corresponding to the positions are formed as shown in Fig. 4. Then, the phosphor 4-4 may be applied to the front glass 4-3.

Now, in Fig. 3, the X electrodes (Xl, X2...
・) The pitch of the light emitting element points is e as shown in the figure,
The pitch when displaying a black and white image is f.

Considering that the pitch of conventional light-emitting element points is determined by the electrode width and the phosphor width, with this configuration it is possible to obtain the relationship e (a) with the same electrode width and phosphor width as above. .

That is, f<b can be satisfied.

On the other hand, for the X electrodes (Yl, Y2...), when displaying a monochrome image, the pitch of the light emitting element points is h, and compared to the conventional panel (Fig. 2), h > c, and the pitch in the Y-axis direction is h. The resolution (vertical resolution when displaying television signals normally used) is lower.

Chiru.

However, considering that different signals are applied to each of the X electrodes, it becomes possible to display each scanning line with each X electrode.

Therefore, the pitch of the X electrodes is g shown in Figure 3,
Since it is possible to set the resolution to g-c, it is possible to display the image without reducing the resolution in the Y-axis direction.

Next, an ink-lace display using the one line at a time method using the panel shown in FIG. 3 will be described.

Interlacing in the NTSC system is performed at a ratio of 2:1, and when driving the panel shown in Figure 3, odd number electrodes Y
1. ¥3. . . . Yzz" 1 . . . electrodes may be selected every horizontal period using, for example, a shift register, and in the next field, even number electrodes ¥2, ¥4, etc.
. . . Y2j-+2 . . . By selecting the electrodes using another shift register, incremental scanning becomes possible.

Therefore, the X electrodes are the odd numbered electrodes X1. X3...
A signal is applied to X2j+1..., and the even number electrodes X2. Full screen display can be completed by giving a signal to X4...X2j+2.

That is, in the X electrode, the electrode X1. X2 may be connected to form common electrodes X1, 2, and a composite color signal of R-G-R-G . . . may be applied to the common electrodes X1, 2 for each field.

FIG. 5 shows a color signal synthesis circuit, and FIG. 6 shows its waveform diagram.

That is, by switching the changeover switch 5-1 in FIG. 5 using the vertical synchronization signal, the sixth
Signals ERG and EBR in the figure.

EGB may be combined, each combined signal may be sampled, and applied to each X electrode.

That is, the signal ERG in FIG. 6 (6-1) is transmitted from the common electrodes X1, 2 . X7,8. ...X6i+1
, 6i+2..., and the signal EBR in FIG. 6 (6-2) is applied to the common electrodes X3,4°X9,1o,...
・X610:3t 6t +4..., and the signal EGB in FIG. 6 (6-3) is applied to the common electrodes X5, 6. X1
□, 12°...X6 i +5,6 i +6
. . . makes it possible to perform increment display. Furthermore, by shifting the phase of the sampling pulse by the pulse width for each field, television display becomes possible without reducing the resolution.

FIG. 7 is a block diagram of an embodiment of the video display device of the present invention.

In FIG. 7, terminals 7-1 and 7-2 are synchronization signal input terminals, and terminals 7-3, 7-4, and 7-5 are R, G,
This shows the input terminal for the B color signal.

Reference numeral 7-6 denotes a sampling pulse generation circuit, which uses, for example, a normal serial-in/parallel-out shift register, and outputs are taken out from every other stage of the register.

7-7 is a color signal synthesis circuit shown in FIG. 5, 7-8 is a sampling hold circuit, and 7-9 is a pulse width modulation circuit, which generates a signal sampled by the output signal of the sawtooth wave generator 7-10. This modulates the pulse width into pulse width.

Reference numeral 7-11 is an amplifier, 7-12 is an incremental scan switching circuit, and 7-13 and 7-14 are Y-axis drive circuits constituted by, for example, shift registers.

FIG. 8 shows a sampling pulse generation circuit.

In the figure, 8-1 is a gate signal input terminal synchronized with a horizontal synchronizing signal.

8-2 is a synchronous oscillator, the oscillation frequency of which is determined depending on the number of X electrodes.

8-3 is a binary counter, 8-4 is a vertical synchronizing signal input terminal, 8-5 is a flip-flop, 8-6 and 8-7 are N
An AND circuit, 8-8 a NOR circuit, 8-9 a shift register, and 8-10 a group of sampling pulse output terminals, indicating that data is taken out every other stage of the shift register 8-9.

The operation of this circuit is to count the output of the synchronous oscillator 8-2 with a counter 8-3, take out, for example, the first and second pulses, and transfer these pulses to the flip-flop 8-3 which receives the vertical synchronizing signal as input. NAND with the outputs Q and Q of 5
Gate in circuit 8-6.8-7, this NAND
The shift register 8-9 is started by the output signal of the candy 8-6, 8-7.

As a result, one of the output terminal groups 8-10 can obtain a sampling pulse whose repetition period is one horizontal scanning period and which is shifted by the pulse width every field.

By doing so, a sampling pulse having a phase corresponding to the position of each X electrode can be obtained.

On the other hand, if the changeover switch 5-1 in FIG. 5 is controlled using the signal at the terminal 8-11, the signal ERG EBRj
The phase relationship between EGB and the sampling pulse can be matched, and the phase of the X electrode selection pulse can also be roughly determined.

FIG. 9 is a configuration diagram of another example of the display panel used in the present invention.

In FIG. 9, X electrodes X1, 2 . X3, 4...
- and X electrode X1. Y2. . . . are the same as those shown in Fig. 3, but the X electrodes X1゜2, x3t42
・・・・・・ is bent as shown in the figure.

Ru.

This means that the electrodes X□ and X2 in Fig. 3 are connected internally, whereas they are connected externally.
Usually such electrodes can be made by vapor deposition.

Further, the phosphor may be formed at the intersection of these X and X electrodes in the same manner as the phosphor arrangement shown in FIG.

The above has described a color display, but if the purpose is to display a television signal in a single color, the same phosphor is applied in both Figures 3 and 8, and the sampling pulse is connected to the circuit shown in Figure 8. The video signal can be sampled by generating the video signal.

In this case, the switching circuit shown in FIG. 5 becomes unnecessary.

As described above, according to the video display device of the present invention, the X
The electrode drive circuit can be reduced to half of the conventional one, and at the same time the density of horizontal picture elements can be increased.
High quality images can be obtained despite the reduction in the number of drive circuits.

[Brief explanation of the drawing]

Fig. 1 is an electrode layout diagram of a conventional X-Y matrix display panel, Fig. 2 is an enlarged view of Fig. 1, Fig. 3 is a configuration diagram of an example of a display panel developed according to the present invention, and Fig. 4 is an enlarged view of Fig. 1. FIG. 3 is an exploded perspective view of the panel, FIG. 5 is a color signal synthesis circuit diagram used in the present invention, FIG. 6 is a waveform diagram in FIG. 5, and FIG. 1 is an embodiment of the video display device of the present invention. FIG. 8 is a circuit diagram of a sampling pulse generation circuit used in the present invention, and FIG. 9 is a configuration diagram of another example of a display ice pack used in the present invention. Xi...X electrode (column electrode)', Y...
・X electrode (row electrode), P'1□? P '21 t P
'31... Fluorescent body, Xl. i+1...Common electrode, 7-6...Sampling pulse generation circuit, 7-7...Color signal synthesis circuit, 7-8...Sampling hold circuit , 7-12... Interlaced scanning switching circuit,
7-13.7-14... Y-axis drive circuit.

Claims (1)

[Scope of Claims] 1. A first light-emitting element point group including a plurality of row electrodes and a plurality of column electrodes and provided at a position corresponding to a - column electrode and an odd-numbered row electrode; a matrix display panel having a second light-emitting element point group provided at a position corresponding to a column electrode and an even-numbered row electrode and shifted in the row electrode direction with respect to the first light-emitting element point group; a sampling means for sampling an input video signal using a sampling pulse having a phase corresponding to the position of the odd-numbered column electrode in the field and corresponding to the position of the even-numbered column electrode in the even-numbered feed; A video display device comprising: signal applying means for applying a video signal to corresponding electrodes of the column electrodes; and means for selecting odd or even numbered row electrodes of the matrix display panel for each field. 2. A fluorescent substance formed at the light emitting element points of the matrix display panel such that the light emitting element points of any column electrode of the matrix display panel have the same color and the three primary colors are sequentially repeated in the direction of the row electrodes; Claim 1, further comprising color signal switching means for switching a pair of input color signals corresponding to the luminescent color of the light emitting element points of the column electrodes for each field and supplying the same to the sampling means as an input video signal. The video display device described in Section 1.