KR100284749B1 - Optical recording device - Google Patents

Abstract

Two rows of light-emitting dot rows 7 and 8 formed on the positive electrode substrate 2, two filament-shaped cathodes 12 and 13 provided for each light-emitting dot row, and a central shield for driving the light-emitting dot rows. In the optical recording element 1 having the electrode 60 and the control electrodes 30 and 31 on both sides, the distance between the shielding electrode 60 and the positive electrode substrate 2 is set to a constant value.

An end of the shielding electrode 60 is connected to the frame 50. The frame 50 is on the insulating layer 40 formed on the anode substrate 2 around the light emitting dot row. The protrusion 61 is provided at the end of the shielding electrode 60. The protrusion 61 is in a position deviating from the display area in which the light-emitting dot rows 7 and 8 are located, and at the same time directly contacts the surface of the positive electrode substrate 2 in the part without the insulating layer 40. Even if there is some dispersion in the thickness of the insulating layer 40 or the frame 50, the distance between the shielding electrode 60 and the positive electrode substrate 2 can be kept constant.

Description

Optical recording device

The present invention relates to an optical recording element in which two rows of light emitting dot rows are provided. The optical recording element of the present invention is useful as a light source for a printer that can be used for recording means such as a video printer, an electrophotographic printer, a label printer, a silver salt printer and the like.

The optical recording device 100 proposed by the applicant will be described with reference to FIGS. 4 to 6. As shown in Fig. 6, the optical recording element 100 includes an enclosure 5 in which a cathode substrate 2, a side plate 3, and a back substrate 4 are assembled in a box shape by sealing glass. Have The inside of the envelope 5 is in a high vacuum state.

As shown in Fig. 5, on the inner surface of the positive electrode substrate 2, along the longitudinal direction of the positive electrode substrate 2, the first and second light emitting dot rows 7 comprising a plurality of light emitting dots b are formed; 8) is installed. Each light emitting dot 6 has a framework conductive film such as aluminum formed on the positive electrode substrate 2, and a phosphor layer deposited on the framework conductive film. The first and second light emitting dot rows 7 and 8 are arranged at predetermined intervals in a direction orthogonal to the longitudinal direction of the substrate. Each of the light-emitting dots 6 of the first and second light-emitting dot rows 7 and 8 is arranged so that their positions in the longitudinal direction of the substrate do not coincide with each other. That is, in each light emitting dot 6 of the double light emitting dot rows 7, 8, the light emitting dots 6 and 6 adjacent to each other are arranged in a zigzag state. The two light emitting dots 6 and 6 adjacent to each other between the first and second light emitting dot rows 7 and 8 are connected in common to each other by an anode wiring, so that the two light emitting dot rows 7 and 8 It is derived from the anode wiring 9 on one side.

This optical recording element 100 is driven dynamically. As shown in FIG. 5, two adjacent light emitting dots 6 and 6 of the first and second light emitting dot rows 7, 8 are connected, and the positive electrode substrate 2 is shown as shown in FIG. The anode wiring 9 of the phase is drawn out to the outside of the envelope 5.

As shown in FIG. 5, the planar control electrode 11 is provided on the upper surface of the positive electrode substrate 2. As shown in FIG. The plane control electrode 11 is made of a conductive film such as aluminum, and is provided in the same plane as the light emitting dot 6 by surrounding the light emitting dot 6 and the anode wiring 9 and the like. At the time of driving, a positive voltage is always applied to the planar control electrode 11 to make the electric field in the vicinity constant.

As shown in Figs. 4 and 5, in the envelope 5, above the first and second light emitting dot rows 7 and 8, the light emitting dot rows 7 and 8 are located. Accordingly, the first negative electrode 12 and the second negative electrode 13 in the filament state (according to the first direction) are respectively provided taut. On the inner surface of the back substrate 4, a nesa film 14 which is an antistatic transmissive conductive film is formed.

4 and 5, a shielding electrode 20 is provided between the first light emitting dot row 7 and the second light emitting dot row 8. As shown in FIG. The shielding electrode 20 is a flat electrode member and is provided substantially perpendicular to the positive electrode substrate 2. The lower end thereof faces the surface of the positive electrode substrate 2 at a predetermined minute interval (about 0.3 mm in this example). The upper end of the shielding electrode 20 is above the positions of the first and second cathodes 12 and 13 and prevents electrons from the cathodes 12 and 13 from flowing over the shielding electrode 20 to the opposite side.

With respect to the shielding electrode 20, a first control electrode 30 is provided in a space on the side where the first cathode 12 is arranged. With respect to the shielding electrode 20, a second control electrode 31 is provided in a space on the side where the second cathode 13 is disposed. Each of the control electrodes 30 and 31 is a plate material having a substantially L-shaped cross section when viewed in a plane orthogonal to the first direction, and the flange plate portion parallel to the positive electrode substrate 2 is disposed in parallel to the surface of the positive electrode substrate 2. Doing. The flange plate portion of the control electrode is located above the positive electrode substrate 2 at a small interval (about 0.5 mm in this example). The upper ends of both control electrodes 30 and 31 are located above the cathodes 12 and 13. That is, the cathodes 12 and 13 are surrounded by the shielding electrode 20 and the two control electrodes 30 and 31. In this example, each of the cathodes 12 and 13 is disposed approximately in the middle of the shielding electrode 20 and the corresponding control electrodes 30 and 31.

The driving of the optical recording element 100 will be described. The first and second cathodes 12, 13 are always energized to emit electrons. A zero or positive voltage is always applied to the shielding electrode 20. A positive voltage is always applied to the planar control electrode 11. Two adjacent light emitting dots 6 and 6 of the first and second light emitting dot rows 7 and 8 are sequentially driven. In synchronization with the scanning of each light emitting dot 6, a selection signal is applied to the first and second control electrodes 30, 31. For example, when a positive voltage is applied to the first control electrode 30 in synchronization with the scanning timing of the light emitting dot train, a negative voltage is applied to the second control electrode 31. Electrons enter between the first control electrode 30 to which the positive voltage is applied and the shielding electrode 20 to the light emitting dot 6 to which the driving signal of the first light emitting dot row 7 is applied. The electrons collide to emit light. Between the second control electrode 31 and the shielding electrode 20 to which a negative voltage is applied, an electric field is interrupted and no electrons enter, and electrons do not collide with the second light emitting dot row 8. , Does not emit light.

Since the upper end of the shielding electrode 20 is higher than the cathodes 12 and 13, electrons are prevented from entering the side that is not emitted. By the shielding electrode 20 to which a positive voltage is applied, the influence of the potential of the control electrode to which a negative voltage is applied does not reach the light emitting side to which the positive voltage is applied to the control electrode, and a positive voltage is applied to the control electrode. The light emitting dot 6 on the applied side selectively emits light. The light emission of the light emitting dot 6 is irradiated to the front of the positive electrode substrate 2 through the transparent anode conductor and the positive electrode substrate 2.

7 is an enlarged view illustrating a structure of an end portion of the shielding electrode 20. On the upper surface of the positive electrode substrate 2, an insulating layer 40 is formed, surrounding an elongated substantially rectangular display area in which the light emitting dot rows 7 and 8 are provided. An end portion of the shielding electrode 20 is fixed to the frame 50 disposed on the insulating layer 40. The frame 50 is a metal member of a corresponding shape having a longitudinal direction orthogonal to the longitudinal direction of the shielding electrode 20, and is sealed and penetrated through the sealing portion of the envelope 5 to be drawn out of the envelope 5. . Both ends of the shielding electrode 20 are supported by such a structure together. In Fig. 7, 51 and 52 are frames for holding both ends of the control electrodes 30 and 31, and these frames 51 and 52 are also disposed on the insulating layer 40, and the ends thereof are enveloped. (5) is drawn out.

As described above, both ends of the shielding electrode 20 are coupled to the frame 50 mounted on the insulating layer 40 formed on the anode substrate 2, and thus the shielding electrode shown in FIG. The small distance t between the positive electrode substrate 2 and the positive electrode substrate 2 (about 0.3 mm in the above example) was determined by the thickness of the insulating layer 40 and the frame 50.

However, since the insulating layer 40 is formed by the thick film printing method, it is not easy to accurately set the thickness of the insulating layer 40, and therefore, the shielding electrode 20 and the positive electrode substrate 2 It was difficult to always set the interval t to a predetermined value. In some cases, the interval t may exceed the target 0.3 mm. In such a case, an electric field by a control electrode to which a negative voltage is applied may affect the side of the light emitting dot row adjacent to the gap, and the light emitting dot string on the selected side may not emit light due to the negative potential. there was.

In order to precisely set the gap, it is also contemplated to install and support an insulating layer at a position other than both ends of the shielding electrode 20. However, a position other than both ends of the shielding electrode 20 is a display area in which the light-emitting dot rows 7 and 8 are provided. If an insulating layer is provided here, the display may be missing letters due to the influence of electrons charged in the insulating layer. Adverse effects occur. Therefore, it is not preferable to employ a structure in which the insulating layer is provided in the display area to support the shielding electrode 20.

1 is an enlarged perspective view showing the vicinity of an end portion of a positive electrode substrate in an example of embodiment of the present invention.

2 is a partially cutaway perspective view showing an example of an embodiment of the present invention.

3 is an enlarged perspective view showing the vicinity of the end portion of the shielding electrode in one example of the embodiment of the present invention.

4 is a cross-sectional view showing the electrode structure of the optical recording device proposed by the present applicant.

5 is a plan view showing an electrode structure of the optical recording device proposed by the present applicant.

6 is a partially cutaway perspective view of the optical recording device proposed by the present applicant.

7 is a perspective view showing a problem in the electrode structure of the optical recording device proposed by the present applicant.

[Explanation of symbols on the main parts of the drawings]

1: Optical recording device 2: Anode substrate

5: envelope 6: luminous dot

7,8: light emitting dot row 12,13: cathode

30, 31: control electrode 60: shielding electrode

61: protrusion

The present invention relates to an optical recording element having two rows of light emitting dots formed on a positive electrode substrate, two filament-shaped cathodes provided for each light emitting dot row, a shielding electrode in the center for driving the light emitting dots, and control electrodes on both sides. It is an object of the present invention to set a distance between the shielding electrode and the positive electrode substrate to a constant value.

[Means for solving the problem]

An optical recording element as claimed in claim 1 includes an array of light emitting dots consisting of a plurality of light emitting dots arranged on an inner surface of an anode substrate which is a part of the envelope, and an array of light emitting dots arranged in a high vacuum state. A control electrode provided on the outside of each of the light emitting dot rows, a shielding electrode provided according to the light emitting dot rows at a predetermined interval between the two light emitting dot rows, and the upper side of each of the light emitting dot rows; An optical recording element having a cathode on a filament arranged along a row of light-emitting dots, wherein a projection portion abutting the surface of the positive electrode substrate is formed at a bottom of the shielding electrode.

The optical recording element according to claim 2 is characterized in that, in the optical recording element according to claim 1, the protruding portion abuts on the positive electrode substrate in a region in which there is no anode wiring connecting the two rows of light emitting dots.

The optical recording element according to claim 3 is the optical recording element according to claim 2, wherein the projections are formed at both ends of the shielding electrode.

In the optical recording element according to claim 4, the optical recording element according to claim 1 is characterized in that the height of the shielding electrode is higher than that of the cathode.

In the optical recording element according to claim 5, the optical recording element according to claim 1 is characterized in that the control electrode is insulated from the positive electrode substrate, and its height is higher than that of the negative electrode.

In the optical recording element according to claim 6, in the optical recording element according to claim 1, a sequential scanning signal is applied to each of the two light emitting dots adjacent to each other in a zigzag pattern between the two light emitting dot rows to the light emitting dot, and the shielding A positive voltage is always applied to an electrode, a positive selection voltage is applied to one of the two control electrodes in synchronization with the scanning of the light emitting dot, and a negative non-selection voltage is applied to the other. .

[Inventive Embodiment]

An embodiment of the present invention will be described with reference to FIGS.

The structure of the optical recording element 1 of this example has a part in common with the optical recording element 100 described in the prior art section made by the applicant. The part is given the same code | symbol as the code | symbol of FIGS.

As shown in Figs. 1 and 2, on the upper surface of the positive electrode substrate 2, there are two rows of light emitting dot rows 7 and 8 composed of a plurality of light emitting dots arranged in a zigzag shape. The display area on which the light emitting dots 7 and 8 are formed is enclosed, and an insulating layer 40 is deposited on the upper surface of the positive electrode substrate 2. As shown in Fig. 1, the ends of the shielding electrode 60 and the two control electrodes 30, 31 are connected to different frames 50, 51, 52, respectively, and each of the frames 50, 51, 52 Are spaced apart from each other on the insulating layer 40.

As shown in Fig. 1 and Fig. 2, a projection 61 protruding toward the anode substrate 2 is formed at the end of the shielding electrode 60. Figs. These projections are at both ends of the shielding electrode 60. As enlarged in FIG. 3, the projection 61 of this example is substantially semi-circular.

As shown in Figs. 1 and 2, the projections 61 are provided at positions away from the display area in which the light-emitting dot rows 7 and 8 are located, and at the same time, the portion of the positive electrode substrate 2 is not provided at the portion where the insulating layer 40 is not present. Is in direct contact with the surface.

The shielding electrode 60 of this example is not placed between the insulating layers 40 on both sides as in the optical recording device 100 made by the applicant of the present application described in the prior art, and at both ends thereof, the positive electrode substrate ( 2) is firmly in contact with the surface. Therefore, the gap between the shielding electrode 60 and the positive electrode substrate 2 in the display area is precisely set to the desired value even if dispersion occurs in the thickness of the insulating layer 40 or the like. Therefore, it is possible to reliably prevent the case where the potential of the control electrode on the non-selective side affects the light emitting dot array on the selected side from below the shielding electrode 60.

Furthermore, as described above, the protrusion 61 is provided to avoid the display area, so that the shielding electrode 60 does not come into contact with the light emitting dot rows 7, 8 or the wiring of the planar control electrode 11. Also in the display area, a portion free of the anode wiring may be formed, and the projection may be brought into contact therewith.

The shape of the protrusion 61 is semicircular as described above, and abuts the positive electrode substrate 2 at the brownish lower end, whereby the contact state is stable while being in point contact. Therefore, even if some dispersion occurs in the thickness of the frame 50 or the insulating layer 40, the shape of the metal member or the thickness of the insulating layer 40 in the heating step or the like in the manufacturing process of the optical recording element 1. Even if is changed, the distance between the shielding electrode 60 and the positive electrode substrate 2 can be kept constant.

However, the shape of the projections does not necessarily need to be semicircular as in the present embodiment, and other shapes may be adopted depending on the conditions. For example, as a shape having a sharp tip such as a triangular shape, it may be substantially in contact with the positive electrode substrate 2 at a point, and a constant effect can be obtained even in a shape such as a rectangle or a trapezoid. In other words, it is sufficient that the position of the shielding electrode 60 can be reliably determined in contact with the surface of the positive electrode substrate 2.

According to the optical recording element of the present invention, two rows of light emitting dot rows formed on a positive electrode substrate, two filament cathodes provided for each light emitting dot row, a center shielding electrode for driving the light emitting dots, and control electrodes on both sides are provided. In the optical recording device having a projection, the projection is formed in the shielding electrode in contact with the surface of the positive electrode substrate, so that the distance between the shielding electrode and the positive electrode substrate can be kept constant even if there is some dispersion in the thickness of the insulating layer or the frame.

Claims (6)

Two rows of light emitting dots consisting of an envelope having a high vacuum state inside, a plurality of light emitting dots arranged on an inner surface of a positive electrode substrate which is a part of the envelope, and each outer side of each of the light emitting dot rows according to the respective light emitting dot rows A control electrode, a shielding electrode provided along the light emitting dot row at a predetermined interval between the light emitting dot rows and the two rows of light emitting dot rows, and a cathode on a filament disposed in accordance with the light emitting dot rows above each light emitting dot row; An optical recording element having a bottom portion of the shielding electrode, wherein the projection portion abutting on the surface of the positive electrode substrate is formed. 2. The optical recording element according to claim 1, wherein the protrusion contacts the positive electrode substrate in an area where no positive wiring connects the two rows of light emitting dots. 3. The optical recording element according to claim 2, wherein the protrusions are formed at both ends of the shielding electrode. An optical recording element according to claim 1, wherein the height of the shielding electrode is higher than that of the cathode. 2. The optical recording element according to claim 1, wherein the control electrode is insulated from the positive electrode substrate and its height is higher than that of the negative electrode. 2. The light emitting dot of claim 1, wherein a sequential scanning signal is applied to each of the two light emitting dots adjacent to each other in a zigzag pattern between the two light emitting dot rows, and a positive voltage is always applied to the shielding electrode. A positive selection voltage is applied to one of the two control electrodes in synchronism with the scanning of, and a negative non-selection voltage is applied to the other.