JPS62150639A - Grid electrode for flat matrix type crt - Google Patents

Abstract

PURPOSE:To improve the picture element density and reduce the visual distance, by dividing each picture element electrode into three, the red, blue, and green display electrodes. CONSTITUTION:A phosphor pattern is a picture element subdivided into the red R, the blue B, and the green G in this order, which is a pattern liable to make color mixing, where the density of picture elements per unit area can be increased. As a grid electrode composition to realize such a pattern, picture elements Y1-Y12 are arranged, and the picture element electrode group Y1-Y3, Y4-Y6, Y7-Y9, and Y10-Y12 are formed unitary through insulators, arranged as shown in the figure. IN such a composition, only X1-X4 scanning electrodes are necessary, the common use is realized, and a mass production effect can be acquired in the manufacture.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a grid electrode of a flat matrix CRT in a large dust image display device, and is particularly suitable for use as a short-distance display such as an arena, a convention hall, or a computer. The present invention relates to a grid electrode structure of a flat matrix CRT whose applications can be expanded to courses, shopping malls, etc.

[Conventional technology]

Figure 3 shows a flat matrix CRT that has already been proposed.
shows the grid electrode structure of the flat matrix CR
1d, scanning electrodes X1 to X4, and pixel electrodes Y1 to Y4 4×
It has a 4-matrix structure, and 16 pixels in one element are arranged in red (R), green (G), and back (B) colors as shown in the figure.

In order to arbitrarily select these pixels, it is sufficient to apply a voltage to each scanning electrode and pixel electrode, and only the portion to which voltage is applied to both electrodes emits light.

As is well known, the electrons emitted from the filament are accelerated by the voltage applied to the scanning electrode and the grid electrode of the pixel electrode, and collide with the anode to which a high voltage is applied, causing the electrons to strike the anode electrode surface, for example. The applied phosphor emits light due to the collision energy at this time.

Figures 4 and 5 are diagrams of the light emission pattern based on the above principle and the corresponding voltage waveforms applied to the grid electrode.
In contrast to the voltages applied to the scanning electrodes X1 to X4 shown in ) to (d), the voltages shown in (e) to (h) to the pixel electrodes Y1 to Y4 may be applied.

[Problem that the invention seeks to solve]

However, depending on the grid electrode constructed as described above,
The light emission pattern is determined depending on the electrode arrangement pattern, and therefore, only the friend viewing distance can be obtained depending on the dot pitch of each pixel.

Therefore, the present invention has been made in view of the above points, and provides a grid electrode having a structure that can increase the pixel density and shorten the viewing distance compared to the previously described examples.

[Next method to solve the problem]

The grid electrode of the flat matrix CRT according to the present invention includes a plurality of next scan electrodes arranged in a plurality and a plurality of pixel electrodes arranged in a plurality to form a matrix structure. The electrodes are divided into three electrodes for red, back, and green display.

[Effect]

According to the grid electrode of the flat matrix CRT according to the present invention, each pixel electrode can be set in red, and the distance can be shortened, and the scanning electrode can be shared. Mass production efficiency can be improved simply by making changes.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings. FIG. 2 shows a display pattern in which the phosphor pattern is further segmented than that obtained from FIG. 3 to increase the pixel density, and the display pattern described above can be realized by the structure of the grid electrode shown in FIG.

In other words, the phosphor pattern shown in Figure 2 is a pattern in which each pixel is subdivided into red (R), f (B), and green (G) in the order of red (R), f (B), and green (G). It can increase the elementary density.

As shown in FIG. 1, a grid electrode structure for realizing such a pattern includes pixel electrodes Y1 to Y12, pixel electrodes Y1 to Y3 . Y4-y6, y7-Y9. Y1
If 0 to Y12 are formed integrally with each other through an insulating material and arranged as shown in the figure, only flX1 to flX4 will be needed as scanning electrodes, and sharing can be achieved. I can do that.

According to the structure of the grid electrode as described above, it is possible to control light emission of a desired color by controlling voltage application to the electrode in the same manner as shown in FIG. If electrode Y1 is turned on, red (R) light emission can be obtained.Similarly, if pixel electrodes Y2 and Y3 are turned on during the on period of scanning electrode X1, blue (B) and green (G) light can be obtained.
) can be obtained.

That is, the scanning electrode can be shared by simply changing the drive circuit that independently controls the pixel electrodes Y1 to Y12, and may be the same as that shown in FIG. 3.

By doing so, the pixel density can be significantly increased.

In addition, in Fig. 1, each pixel is subdivided into red (R).
, blue (B), and green (G), a full-color display can be achieved by controlling the amount of current to each electrode according to the required brightness.

〔Effect of the invention〕

As described above, according to the present invention, a flat matrix CR is provided with a plurality of scan electrodes arranged and a plurality of pixel electrodes arranged so as to form a matrix structure together with the scan electrodes.
Since each pixel electrode is divided into three electrodes for red, blue, and green display in the 'l' grid electrode h, it is possible to increase the pixel density and shorten the viewing distance. It is possible to share information, and mass production effects can be expected in terms of manufacturing.

[Brief explanation of drawings]

Figures 1 and 2 show one embodiment of this invention; Figure 1 is a diagram of the grid electrode structure that realizes the phosphor pattern of Figure 2; Figure 2 is a diagram of the phosphor pattern; FIG. 3 is a diagram of voltage waveforms applied to the electrodes to obtain the results. In the figure, X1 to x4...scan electrodes Y1 to Y12...pixel electrodes

Claims (1)

[Claims] In the grid electrode of a flat matrix CRT, which is equipped with a plurality of scanning electrodes and a plurality of pixel electrodes arranged together to form a matrix structure, each pixel electrode is divided into three electrodes for red, blue, and green display. A flat matrix CRT grid electrode characterized by being divided.