KR0139035B1 - Flat Panel Display - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar image display apparatus for an image apparatus, wherein an electron beam of a portion around a screen irradiates only a predetermined image segment in a planar image display apparatus, so as to obtain a normal image on the entire screen. In this configuration, the back electrode 1, the front cathodes 2a, 2b, and 2c as the electron beam source, and the lead-out electrode 3, inside the flat glass valve vacuum from the rear of the screen to the front. ), Signal electrodes 4, connection electrodes 5, horizontal deflection electrodes 6, vertical deflection electrodes 7a, 7b, and screen 19, which are formed so as to face each other with a hedge-shaped conductive plate facing each other. ) Is a structure in which branch portions 23a and 23b, which are conductive plates facing each other, of horizontal deflection electrodes 6 are provided outside the effective electron beam passing region.

Description

Flat Panel Display

1 is an enlarged view illustrating main parts of a horizontal deflection electrode according to an exemplary embodiment of the present invention.

2 is a sectional view of main parts of A-A.

3 is an enlarged view of the same former.

4 is an enlarged view illustrating main parts of a vertical deflection electrode according to an exemplary embodiment of the present invention.

5 is a sectional view of main parts of B-B.

6 is an enlarged view of the same part.

Figure 7 is an enlarged view of the main portion of the focusing electrode of an embodiment of the present invention.

8 is a sectional view of main parts of the same C-C.

9 is an enlarged view of the copper bottle.

10 is an exploded perspective view of a conventional flat image display device.

11 is a configuration diagram of a screen of a flat image display device.

12 is an external view of a flat image display device.

13 is a cross-sectional view of the D-D.

14 is an enlarged view illustrating main parts of a conventional horizontal deflection electrode;

Fig. 15 is a sectional view of main parts of E-E.

16 is an enlarged view of the same government.

17 is an enlarged view of the periphery of a conventional screen.

* Description of the symbols for the main parts of the drawings *

5: focusing electrode, 6: horizontal deflection electrode,

7: vertical deflection electrode, 14: through hole,

15, 16, 18: conductive plate, 17: electron beam,

22: stem portion, 23: branch portion,

24: branch pair

The present invention relates to a flat image display device in a video device.

Conventionally, the display element for color television image display mainly uses a CRT. However, in a CRT, it is impossible to manufacture a thin TV receiver because its length is longer than that of a screen. In addition, as a flat panel display holder, an EL display device, a plasma display device, a liquid crystal display device, and the like have recently been opened, but all are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display.

Therefore, a novel display device is proposed by Japanese Patent Application Laid-Open No. 1-130453 (Japanese Patent Application No. 62-288762) to achieve a flat panel display device using an electron beam.

This divides the screen on the screen into a plurality of divisions in the vertical direction, deflects the electron beam in the vertical direction for each division, displays a plurality of lines, and divides the screen on the screen into a plurality of divisions in the horizontal direction. So that the phosphors of R (red), G (green), and B (blue) are sequentially emitted, and the amount of electron beam irradiation to the phosphors of R, G, and B is controlled by a color image signal. It is to display TV image as a whole.

A part of the conventional image display apparatus is shown in FIG. 10 as an exploded perspective view. In Fig. 10, reference numeral 1 denotes a rear electrode, numerals 2a, 2b and 2c are linear cathodes as an electron beam source, numeral 3 an electron beam drawing electrode, numeral 4 a signal electrode, and numeral 5 a focusing electrode. The electrodes 6 are horizontal deflection electrodes 7a, 7b are vertical deflection electrodes, and these components are housed in the surface container 8 and the back container 9 made of glass or the like, and the inside of the container is vacuumed. Thus, an image display device is achieved.

The back electrode 1 is made of a flat conductive material, and is formed in parallel with the front cathodes 2a to 2b.

The front cathodes 2a to 2c are stretched in the horizontal direction so as to generate an electron flow having a substantially uniform current density distribution in the horizontal direction, and a plurality of the cathodes 2a and 2b in the vertical direction with appropriate intervals. , Only three of 2c are displayed). These cathodes 2a to 2c are formed by coating an oxide cathode material on the surface of a tungsten wire, for example. The electron beam extracting electrode 3 is made of a conductive plate 11, and the cathodes 2a to (c). A row of through-holes 10, which face the back electrode 1 via 2c) and are formed at appropriate intervals in the horizontal direction, is laid on the horizontal line opposite to the line cathode.

Further, the electron flow generated by the front cathodes 2a to 2c due to the potential difference generated in the back electrode 1 and the electron non-drawing electrode 3 is taken out to be an electron beam.

The signal electrodes 4 are long and thin conductive plates 12 arranged in a plurality of vertical directions at predetermined positions at positions opposite to each other in the horizontal direction of the through-hole 10 in the electron beam extraction electrode 3. Each of the conductive plates 12 has the same through hole 13 at positions facing the through holes 10 of the lead-out electrode 3. Further, the electron beam is irradiated to the position of the phosphor of a predetermined color by a video signal input from the outside, and is deflected to generate a predetermined luminance.

The focusing electrode 5 consists of a conductive plate 15 having a through hole 14 at a position opposite to the through hole 13 of the signal electrode 4, and focuses the electron beam to a predetermined spot on the phosphor. have.

The horizontal deflection electrodes 6 are arranged in pairs by arranging the hedge-shaped conductive plates 16a and 16b which are arranged in the vertical direction on the same plane so as to face the middle of the rows of the through holes 14 of the focusing electrodes 5. A horizontal deflection electrode 6 of which the shape is arranged so as to face each other with the hedge-shaped conductive plates 16, as shown in FIG. 10, being comb-shaped as a whole; In addition, in the comb-tooth shaped conductive plate as shown in FIG. 13, branches are formed so as to face both sides in the longitudinal direction of each stem, and the branches are disposed so as to face each other, and predetermined to the conductive plates arranged to face each other. The horizontal beam is deflected by applying a voltage of.

The vertical deflection electrode 7 includes the board-like conductive boards 18a and 18b which are steered in the horizontal direction on the same plane so as to face the middle of the row of the through holes 14 of the focusing electrode 5. They are arranged so as to form a pair of vertical deflection electrodes 7. For example, in FIG. 10, two comb-shaped conductive plates are interlocked with each other via a suitable interval on the same plane.

The screen 19 is applied to the inner surface of the glass container 8 with phosphors 20 of R (red), G (group), and B (blue) which emit light by irradiation of an electron beam, and a metal back layer (shown thereon). Is not added).

The above image display apparatus obtains a highly uniform image in which the electrodes of adjacent image subdivisions 21 are not shown to the viewer by processing and positioning each electrode with high precision when processing and assembling the electrodes.

In addition, the electron beam 17 is irradiated from the line cathode 2, and through holes 10, 13, 14 formed in the electron beam extraction electrode 3, the signal electrode 4, and the focusing electrode 5, respectively. It passes through and irradiates the screen 19 via the horizontal deflection electrode 6 and the vertical deflection electrode 7.

In addition, as shown in FIG. 11, the screen 19 is irradiated with an electron beam to emit the phosphor 20 so that the screen effective area for actually displaying an image and the periphery of the screen 19 do not actually display the screen. There is a non-screen effective area (an oblique line in Fig. 11). The effective electron beam passing region refers to a region in which an aperture for passing a residual beam exists in an electrode for displaying an image in the image subdivision 21 within this screen effective region, and the boundary of this region is the boundary of the effective electron beam passing region. It is called (∝-∝ line in Fig. 11).

In addition, a combination of a back electrode, a linear cathode, a drawing electrode, a signal electrode, a focusing electrode, a horizontal deflection electrode, a vertical deflection electrode, and a screen plate corresponding to one image subdivision 21 will be referred to as a unit. In the planar image display device having the above structure, since the electron beam is not required in the non-screen effective area, the conductive plates facing each other of the horizontal deflection electrode, the conductive plates facing each other of the vertical deflection electrode, and the through holes of the focusing electrode It was not formed outside the effective electron beam passing region. However, in the conventional structure as described above, the distribution of the electric fields of each electrode of the unit located in the image periphery and the electric field distribution of each electrode of the unit located in the image center is different. That is, the shape of the equipotential surface between the screen center part and the screen peripheral part is different. In addition, as shown in FIG. 12, the electric field distribution of the periphery of the screen is disturbed by the presence of the exhaust pipe portion, the high-pressure terminal, the fixing screw, the outer surface of the surface electrode unit, the external drawing terminal, and the like.

For example, when the conductive plates facing each other are provided only in the effective electron beam passing region in the horizontal deflection electrode as shown in FIG. 13, the shape of the equipotential surface as shown in FIG. The boundary of the electron beam passing region has a shape of an equipotential surface different from that of the center of the screen. Due to the unevenness of the equipotential surface, as shown in FIG. 15, the trajectory from the line electrode to the screen of the electron beam of the unit of the screen center unit and the electron beam of the unit of the unit around the screen becomes a different trajectory, as shown in FIG. Similarly, in the periphery of the screen, electron beams of units adjacent to the screen are irradiated overlapping to generate a brighter part than the surroundings or a part not irradiating the screen.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, so that a normal image is obtained in the entire screen by irradiating the electron beam with only a predetermined image subdivision in the periphery of the screen.

MEANS TO SOLVE THE PROBLEM In order to solve the above subject, this invention provides the back electrode, the front cathode as an electron beam source, an extraction electrode, a signal electrode, a focusing electrode, and the board | substrate hedge-shaped electrically conductive plate inside a flat glass valve vacuum from front to front of a screen. In a flat panel display device in which the horizontal deflection electrodes, the vertical deflection electrodes, and the screen plates are formed so as to face each other, the conductive plates facing each other are provided outside the effective electron beam passing region. With the above configuration, the electric field distribution of the screen center portion is made uniform and the equipotential surface is made uniform, so that a normal image can be obtained in the whole screen.

Best Mode for Carrying Out the Invention Embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is used about the structure similar to a conventional example.

(Example 1)

In FIG. 1, the horizontal deflection electrode 6 is a board-fence conductive plate 16a pivoted in the vertical direction on the same plane so as to face the middle of the row of through-holes 14 of the focusing electrode 5. ) And (16b) are arranged to form a pair of horizontal deflection electrodes (6), and in the comb-shaped conductive plates (16a) and (16b) on both sides in the longitudinal direction of each stem portion (22). Branch portions 23 are formed to face each other. The branch portions 23a of one of the conductive plates 16a are disposed to face the branch portions 23b of the other conductive plates 16b, and predetermined different voltages are applied to the respective conductive plates 16a and 16b. The beam is horizontally deflected by applying.

In addition, the joining branch pair 24 of the branch 23 to be resisted is provided outside the effective electron beam passing region.

In such a configuration, as shown in FIG. 2, in the effective electron beam passing region, the same electric field distribution is repeated by the pair of branches for each unit, and the equipotential surface is also repeated by the pair of branches for each unit. As shown in FIG. 3, the trajectory from the wire electrode to the screen is not changed by the electron beam of the unit of the screen center unit and the electron beam of the unit of the screen peripheral unit. In addition, although the branch pairs 24 of the same shape are provided outside the effective electron beam passing region in FIG. 1, even if the branch pairs 24 of different shapes are provided outside the effective electron beam passing region, the unit pairs 24 within the effective electron beam passing region can be used. The same effect can be obtained by making electric field distribution the same shape.

(Example 2)

In FIG. 4, the vertical deflection electrode 7 is a hedge-shaped conductive plate 18a pivoted in the horizontal direction on the same plane so as to face the middle of the row of the through holes 14 of the focusing electrode 5. ) And (18b) are arranged to form a pair of vertical deflection electrodes (7), and the two comb-shaped conductive plates (18a, 18b) are interlocked with each other via a small gap on the same plane. I am in one configuration.

In addition, the opposing conductive plates 18a and 18b are provided outside the effective electron beam passing region. With such a configuration, as shown in FIG. 5, the same electric field distribution is repeated by the conductive plates for each unit in the effective electron beam passing region, and the equipotential surface is also repeated by the conductive plates for each unit. As shown in the figure, the trajectory from the wire electrode to the screen is not changed by the electron beam of the unit of the screen center portion and the electron beam of the unit of the screen peripheral portion.

In FIG. 4, the conductive plates 18a and 18b are extended in the horizontal direction, and the conductive plates facing each other are provided in the effective electron beam passing region by further providing the conductive plates in the vertical direction. The same effect can be obtained by making electric field distribution the same shape, even if it is different from the electrically conductive plates 18a and 18b in an area | region.

(Example 3)

In FIG. 7, the focusing electrode 5 is comprised by the electrically conductive plate 15 which has the through-hole 14 in the position which opposes the through-hole 13 of the signal electrode 4, respectively.

In addition, the through hole 14 is formed outside the effective electron beam passing region. With such a configuration, as shown in FIG. 8, the same electric field distribution is repeated in the through-holes per unit in the effective electron beam passing region, and the equipotential surface is the same repetition in the through-holes per unit. As shown in FIG. 9, the trajectory from the developed country to the screen is not changed by the electron beam of the unit of the screen center portion and the electron beam of the unit of the screen peripheral portion.

In addition, in Fig. 7, though the through hole 14 in the same shape of the electron beam passing area and the through hole of the same shape are formed outside the effective electron beam passing area, the through hole in the effective electron beam area is formed. The same effect can be obtained by making the electric field distribution have the same shape even if the shape is different from).

As described above, in the present invention, the same electric field distribution is repeated for each unit in each of the electrodes of the vertical deflection electrode, the horizontal deflection electrode and the focusing electrode in the effective electron beam passing region in the operation of the flat image display device. Since the equipotential surface is also repeated in an even shape, the trajectory from the wire electrode to the screen is not changed by the electron beam of the unit in the center of the screen and the unit of the unit in the periphery of the screen, and the electron beams of adjacent units are irradiated or spaced apart. You can get a normal screen without having to investigate and generate.

Claims (3)

Between the back electrode and the screen, a line cathode and a plurality of electrode plates as an electron beam source are disposed, these electrodes are stacked and enclosed in a flat glass container, and then the inside is vacuumed and an effective electron beam is taken out from the line cathode. A flat image display device which controls and illuminates an image on the screen, wherein the conductive plate constituting a horizontal deflection electrode is provided in addition to the effective electron beam passing area of the electrode plate. Between the back electrode and the screen, a pre-cathode and a plurality of electrode plates as an electron beam source are disposed, and these electrodes are stacked and enclosed in a flat glass container, and then the inside is vacuumed and an effective electron beam is drawn out from the pre-cathode and controlled. A flat image display device for projecting an image onto the screen, wherein the conductive plate constituting the horizontal deflection electrode is provided in addition to the effective electron beam passing area of the electrode plate. Between the back electrode and the screen, a pre-cathode and a plurality of electrode plates as an electron beam source are disposed, and these electrodes are stacked and enclosed in a flat glass container, and then the inside is vacuumed and an effective electron beam is drawn out from the pre-cathode and controlled. And a through-hole of a connection electrode in said electrode plate is formed in addition to the effective electron beam passing area.