JP3407012B2 - Light emitting device, method of manufacturing light emitting device, tool and display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting device for constituting a large screen display device used in a stadium, a gymnasium, etc., a method for manufacturing the light emitting device, a tool used in the manufacturing method, and the light emission thereof. The present invention relates to a display device including elements.

[0002]

2. Description of the Related Art FIG. 10 is a front view of a light emitting element for forming a large screen display device used in a stadium, a gymnasium or the like. On the back surface of this light emitting device 1, R, G, B
Three kinds of phosphors 5 are regularly applied, and a large screen display device capable of color display is configured by arranging a large number of such light emitting elements 1.

FIG. 11 is a sectional view taken along line AA of FIG. In this cross-sectional view, the light emitting device 1 includes a front panel 1a having a back surface regularly coated with a phosphor 5 and a rear panel 1c which is opposed to the front panel 1a with a spacer 1b at a predetermined interval. Of the vacuum container. On the inner surface of the rear panel 1c, a linear cathode 2 is provided at a position facing the phosphor 5 and supported by a supporting electrode 6 at a predetermined distance from the inner surface of the rear panel 1c.
A scanning electrode 3 is arranged on the surface of the rear panel 1c facing the linear cathode 2. Lead wires 9 for supplying each voltage to each electrode are drawn out from the end portion of the rear panel 1c.

A high voltage (about 10 kV) is applied to each phosphor 5 to operate as an anode. Phosphor 5 and linear cathode 2
A data electrode 4 is arranged between the fluorescent substance 5 and the linear cathode 2 with a predetermined space therebetween, and electrons pass from the linear cathode 2 to the fluorescent substance 5 through the data electrode 4. An opening 8 is provided for this.

FIG. 12 is a perspective view for three-dimensionally explaining the structure of the light emitting element 1. In this perspective view, the linear cathodes 2 are parallel to each other in the row or column direction.
An overhead wire is provided between the two support electrodes 6. The scanning electrodes 3 are strip electrodes, and are arranged on the inner surface of the rear panel 1c in the direction perpendicular to the linear cathode 2. As described above, the data electrode 4 is a strip electrode having an opening 8 provided in a portion facing the phosphor 5, and is arranged in a direction parallel to the linear cathode 2 and at a predetermined distance from the linear cathode 2. Are arranged. The rear panel 1c is provided with an exhaust port 10 for achieving the above-described vacuum state of the vacuum container.

In the light emitting device 1 having such a structure, the thermoelectrons emitted from the linear cathode 2 are accelerated and collide with the anode, whereby the phosphor 5 on the anode surface is excited to emit light. In FIG. 11, the thermoelectrons emitted from the linear cathode 2 are controlled as follows by the combination of the potential of the scan electrode 3 and the potential of the data electrode 4. (1) When the potential of the scan electrode 3 and the potential of the data electrode 4 are both positive with respect to the linear cathode 2, the vicinity of the linear cathode 2 is positive and electrons are emitted from the linear cathode 2. . The emitted electrons pass through the opening 8 and reach the anode to cause the phosphor 5 to emit light.

(2) When the potential of the scan electrode 3 is positive and the potential of the data electrode 4 is negative, the electrons emitted from the vicinity of the linear cathode 2 reach the anode due to the negative potential of the data electrode 4. Therefore, the phosphor 5 does not emit light. (3) When the potential of the scan electrode 3 is negative and the potential of the data electrode 4 is positive, the negative potential of the scan electrode 3 causes the potential in the vicinity of the linear cathode 2 to be negative, and the emission of electrons is suppressed. . The linear cathode 2 is extended near the scanning electrode 3, and the electron emission from the linear cathode 2 is strongly influenced by the electric field of the scanning electrode 3. (4) When both the potential of the scan electrode 3 and the potential of the data electrode 4 are negative, the vicinity of the linear cathode 2 has a negative potential, and the emission of electrons is suppressed.

As a result, it is located at the intersection of the scan electrode 3 and the data electrode 4 to which the positive potential is applied (in the case of (1)).
Only the electrons emitted from the linear cathode 2 pass through the opening 8 and reach the anode to cause the phosphor 5 to emit light. Therefore, when a scanning signal is applied to the scanning electrode 3 and an arbitrary data signal is applied to the data electrode 4 in synchronization with this, an arbitrary display can be obtained. The linear cathode 2 is a direct heating type and is characterized by low power consumption. In addition, the linear cathodes 2 are arranged so as to correspond to one phosphor 5 so that each phosphor 5 is uniformly irradiated with electrons.

In the conventional method of connecting the linear cathode 2 to the wire,
As shown in FIG. 12, the linear cathode 2 was manually wired and welded between the two support electrodes 6 protruding on the rear panel 1c. FIG. 13 shows Japanese Patent Laid-Open No. 3-1450.
FIG. 32 is an explanatory diagram for explaining an overhead wire work of the linear cathode 2 automated by the device disclosed in Japanese Patent No. 31.
In this overhead wire work, the linear cathodes 2 are arranged on the support electrodes 6 that are integrated and arranged in the row direction or the column direction on the rear panel 1c, and the linear cathodes 2 are sandwiched between the support electrodes 6 and the metal chips 12. Welding. At this time, the metal tip 12 is cut into a predetermined length by a cutter and is overlapped and welded to the linear cathode 2.

[0010]

Such a light emitting device 1
Includes a large number of pixels, and the linear cathode 2 needs to be extended corresponding to each pixel, so that there are many welding points and the work efficiency cannot be improved if welding is performed manually. on the other hand,
In the automation by the device as described above, the metal chip 12
Must be cut into a predetermined length and supplied according to the number of linear cathodes 2 on the supporting electrode 6, so that the process becomes complicated and the working time becomes long. Further, maintenance such as polishing of the cutter is also necessary. If the maintenance is insufficient, the yield of the overhead wire of the linear cathode 2 is reduced due to the displacement and deformation of the metal tip 12, which causes troubles in the automation device. . Furthermore, even after the light emitting element is completed, there is a possibility that a problem such as disconnection of the linear cathode 2 may occur.

The present invention has been made in view of the above-mentioned circumstances, and a light emitting device by a manufacturing method capable of shortening the steps and improving the yield, a manufacturing method thereof, a tool used in the manufacturing method, and It is an object to provide a display device including the light emitting element.

[0012]

According to a first aspect of the present invention, a light emitting device has a structure in which linear cathodes are regularly arranged on supporting electrodes which are regularly arranged on a panel facing a phosphor screen. A pressing electrode formed in a lattice shape for pressing the linear cathode corresponding to each of the supporting electrodes is overlapped with each of the supporting electrodes so as to sandwich each of the linear cathodes. After the welding of each of the linear cathodes and the pressing electrode, the pressing electrode is removed while leaving the welded portion, and the pressing electrode is manufactured.

In the light emitting device according to the second aspect of the present invention, the holding electrode formed in a lattice shape has a portion to be welded that surrounds the portion.
It is characterized by being connected to other parts by points.

In the light emitting device according to the third aspect of the present invention, the pressing electrode formed in a lattice shape has portions to be welded that sandwich the portion.
It is characterized in that it is connected to the other portion by a side and the two sides are half-etched.

In the light emitting device according to the fourth aspect of the present invention, the holding electrode formed in a lattice shape is such that the portion to be welded is connected to the other portion by one side, and the one side is half-etched. And

In the method for manufacturing a light emitting device according to the fifth aspect of the present invention, the linear cathodes are regularly arranged on the support electrodes which are regularly arranged on the panel facing the phosphor screen, and then each of the support electrodes is formed. Corresponding to the above, pressing electrodes formed in a lattice shape to press down the linear cathodes are overlapped with the supporting electrodes so as to sandwich the linear cathodes, respectively, and the supporting electrodes and the linear cathodes, respectively. After welding the holding electrode and the holding electrode, the holding electrode is removed to leave the welded portion, and the holding electrode is manufactured.

In the method for manufacturing a light emitting device according to the first aspect of the invention and the method for manufacturing a light emitting device according to the fifth aspect of the invention, after the linear cathode is arranged on the support electrode, the pressing electrode formed in a grid pattern is formed on each of the support electrodes. The support electrodes, the linear cathodes, and the pressing electrodes are welded to each other so as to sandwich each of the linear cathodes. Next, the pressing electrode is removed, leaving the welded portion, to manufacture. As a result, steps such as cutting and transferring of metal chips are not required, and the manufacturing process can be shortened and the yield can be improved.

A method of manufacturing a light emitting device according to a sixth aspect of the present invention is characterized in that the holding electrode formed in a grid shape has a portion to be welded connected to other portions by four points surrounding the portion. To do.

In the method for manufacturing a light emitting element according to the second aspect of the invention and the method for manufacturing a light emitting element according to the sixth aspect of the invention, the pressing electrode formed in a grid pattern has four points in which the portion to be welded surrounds the portion to be welded. Since it is connected to the part, when removing the holding electrode leaving the welded part, it is possible to easily remove it by shifting the holding electrode other than the welded part in any direction without the need for a cutter, In addition, maintenance of the cutter is unnecessary.

In the method for manufacturing a light emitting device according to the seventh aspect of the present invention, in the pressing electrode formed in a lattice shape, the portion to be welded is connected to the other portion by the two sides sandwiching the portion,
The sides are characterized by being half-etched.

In the method for manufacturing a light emitting element according to the third aspect of the invention and the method for manufacturing a light emitting element according to the seventh aspect of the invention, in the holding electrode formed in a grid pattern, the portion to be welded has two sides that sandwich the portion to be welded, It is connected to the part and its two sides are half-etched, so when removing the holding electrode leaving the welded part, it is easy to bend the holding electrode other than the welded part without using a cutter It can be removed without maintenance of the cutter.

In the method for manufacturing a light emitting device according to the eighth aspect of the present invention, the pressing electrode formed in a lattice shape has a portion to be welded connected to the other portion by one side, and the one side is half-etched. It is characterized by

In the method for manufacturing a light emitting element according to the fourth aspect of the invention and the method for manufacturing a light emitting element according to the eighth aspect of the invention, in the holding electrode formed in a grid shape, the portion to be welded is connected to the other portion by one side. Since the sides are half-etched, when removing the holding electrode leaving the welded part, you can easily remove it by bending the holding electrode other than the welded part without the need for a cutter. No maintenance is required.

The tool according to the ninth invention is supported by a plurality of supporting electrodes fixed on the panel facing the fluorescent screen,
Used for manufacturing a light emitting device having regularly arranged linear cathodes, a holding electrode formed in a lattice shape for holding the linear cathodes corresponding to each of the supporting electrodes, and each of the supporting electrodes. The welded portions that overlap each other so as to sandwich each of the linear cathodes with the pressing portion to be pressed from above the pressing electrode and the lower side of the panel.
And a table to be placed on the underside of the panel.
The pressing portion presses the welded portion from above the pressing electrode, the shearing force or the tensile force generated by moving the pressing electrode in a predetermined direction.
Further , it is characterized in that the welded portion and the other portion of the pressing electrode are cut.

In this tool, the base is placed under the panel.
When the pressing electrode is moved in a predetermined direction , the pressing portion presses the portion of the pressing electrode and the supporting electrode, which are overlapped and welded so as to sandwich each linear cathode, from above the pressing electrode. Or tensile force generated in the
Thus , the welded portion and the other portion of the pressing electrode can be cut without damaging the welded portion.

The tool according to the tenth aspect of the invention is characterized in that the pressing portion comprises a plurality of rod-shaped teeth having a pressing surface which should extend along the longitudinal direction of the linear cathode, and one of the teeth is supported by the base portion. And

In this tool, the pressing portion is provided with a plurality of rod-shaped teeth having a pressing surface that should extend along the longitudinal direction of the linear cathode, and one of these teeth is supported by the base, so that the welded portion is The pressing electrode can be pressed from above, and when the pressing electrode is moved in a predetermined direction, the welded portion of the pressing electrode and other portions can be cut without damaging the welded portion.

In the tool according to the eleventh aspect of the invention, the pressing portion has a plurality of teeth having a pressing surface which should extend along the longitudinal direction of the linear cathode, and the thickness in the pressing direction increases from the tip to the root. It is characterized in that the root of the tooth is supported by the base.

In this tool, the pressing portion has a plurality of teeth each having a pressing surface that should extend along the longitudinal direction of the linear cathode, and the thickness in the pressing direction increases from the tip to the root. Since it is supported by the base part, the welded part can be pressed uniformly from above the pressing electrode without bending, and when the pressing electrode is moved in a predetermined direction, the welded part can be pressed without being damaged. It is possible to cut the welded part and the other part of the electrode.

The tool according to the twelfth invention is characterized in that the pressing portion has a groove which should extend along the longitudinal direction of the linear cathode.

In this tool, since the pressing portion has the groove that should extend along the longitudinal direction of the linear cathode, it is difficult for the linear cathode and the welded portion to contact the inner surface of the groove, and the pressing force per unit area is large. Therefore, when the pressing electrode is moved in a predetermined direction, the welded portion of the pressing electrode and other portions can be cut without damaging the welded portion. Also, damage to the linear cathode is reduced, and the yield at the time of cutting is improved.

A display device according to a thirteenth aspect of the present invention is defined in claim 1
4. The light emitting device according to any one of 4 above is provided.

Since this display device includes the light emitting device according to any one of claims 1 to 4, it is possible to shorten the manufacturing process and improve the yield.

[0034]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments thereof. Embodiment 1. FIG. 1 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to the first invention and a light emitting device according to the fifth invention. In this manufacturing method, as shown in FIG.
The scanning electrodes 3 are preliminarily formed by screen printing on the rear panel 1c, which should face the fluorescent surface on which the R, G, and B phosphors 5 are regularly coated, at positions facing the phosphors 5. . Next, first, the support electrode 6 is attached to the rear panel 1c.
The upper scanning electrodes 3 are fixed at positions sandwiching them in one direction with frit glass (molten glass) or the like.

Next, after the linear cathodes 2 are laid in one direction on the supporting electrodes 6, the pressing electrodes 11a formed in a lattice shape for pressing the linear cathodes 2 corresponding to the supporting electrodes 6 are supported. Linear cathode 2 with each of the electrodes 6
Of the supporting electrodes 6 and the linear cathodes 2 and the pressing electrodes 11a are welded to each other. As the welding method, various methods such as spot welding and laser welding can be applied. Next, when the non-welded portion (hatched portion) of the pressing electrode 11a is cut and removed, the support electrode 6 is placed at a position facing the phosphor 5 (FIG. 10) on the phosphor screen as shown in FIG. Thus, the rear panel 1c in which the linear cathode 2 supported by is disposed, and the scanning electrode 3 is disposed on the surface facing the linear cathode 2 can be manufactured.

FIG. 3 shows the above-mentioned pressing electrode 11a,
It is an explanatory view for explaining a state in which the support electrodes 6 are overlapped with each other so as to sandwich the linear cathodes 2 and the support electrodes 6 and the linear cathodes 2 and the pressing electrodes 11a are welded to each other. (A) is the pressing electrode 11
The top view seen from the top of a is a side view in the AA plane of (a). Linear cathode (filament) 2
The welded part of the two types of electrodes 6, 11 (pressing electrode 11a
Since the structure is sandwiched between the welded parts), the alignment is easy, and the linear cathode 2 is not damaged by the displacement from the electrodes 6 and 11 and the deformation of the electrodes 6 and 11.

As a result, the yield of the light emitting device is improved and the reliability is improved. Further, it is not necessary to grind a cutter for cutting the metal tip 12 and to transfer the cut metal tip 12 to a predetermined position, which shortens the process of the work of connecting the linear cathode 2 to the overhead wire used in this process. The operation of the working device is improved.

As shown in FIG. 2, a rear panel 1 having a linear cathode 2 supported by a supporting electrode 6 disposed thereon and a scanning electrode 3 disposed on a surface facing the linear cathode 2.
A strip-shaped data electrode 4 having an opening 8 in a portion of the phosphor screen facing the phosphor 5 (FIG. 10) is located between the c and the phosphor surface which is the back surface of the front panel. In addition, they are arranged at a predetermined distance from the linear cathode 2. The rear panel 1c includes a light emitting element including a front panel having a phosphor screen and a rear panel 1c (FIG. 10).
An exhaust port 10 for achieving a vacuum state of the (display tube) vacuum container is provided.

In the light emitting device 1 having such a structure, the thermoelectrons emitted from the linear cathode 2 are accelerated and collided with the anode to excite the phosphor 5 on the anode surface to emit light. The thermoelectrons emitted from the linear cathode 2 are combined by the potential of the scan electrode 3 and the potential of the data electrode 4
It is controlled as follows. (1) When the potentials of the scanning electrode 3 and the data electrode 4 are both positive with respect to the linear cathode 2, the vicinity of the linear cathode 2 is positive and electrons are emitted from the linear cathode 2. . The emitted electrons pass through the opening 8 and reach the anode to cause the phosphor 5 to emit light.

(2) When the potential of the scan electrode 3 is positive and the potential of the data electrode 4 is negative, the electrons emitted from the vicinity of the linear cathode 2 reach the anode due to the negative potential of the data electrode 4. Therefore, the phosphor 5 does not emit light. (3) When the potential of the scan electrode 3 is negative and the potential of the data electrode 4 is positive, the negative potential of the scan electrode 3 causes the potential in the vicinity of the linear cathode 2 to be negative, and the emission of electrons is suppressed. . The linear cathode 2 is extended near the scanning electrode 3, and the electron emission from the linear cathode 2 is strongly influenced by the electric field of the scanning electrode 3. (4) When both the potential of the scan electrode 3 and the potential of the data electrode 4 are negative, the vicinity of the linear cathode 2 has a negative potential, and the emission of electrons is suppressed.

As a result, it is located at the intersection of the scan electrode 3 and the data electrode 4 to which a positive potential is applied (in the case of (1)).
Only the electrons emitted from the linear cathode 2 pass through the opening 8 and reach the anode to cause the phosphor 5 to emit light. Therefore, when a scanning signal is applied to the scanning electrode 3 and an arbitrary data signal is applied to the data electrode 4 in synchronization with this, an arbitrary display can be obtained.

Embodiment 2. FIG. 4 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to the second invention and a light emitting device according to the sixth invention. FIG. 3A is an enlarged view of the welded portion B of the linear cathode 2 in FIG. 3A (Embodiment 1), and in this case, the holding electrode 1 formed in a grid shape.
A cutter is required to cut 1a and the portion 11 of the pressing electrode 11a corresponding to the welded portion 13 of the support electrode 6 along the broken line C-C '.

On the other hand, the present embodiment is shown (b).
Then, the pressing electrode 11a formed in a lattice shape and the portion 11 of the pressing electrode 11a corresponding to the welded portion 13 of the support electrode 6 are four points (C, C, C) of four corners surrounding the welded portion 13.
′, C ′). The pressing electrode 11 is
If the four corners are connected, it will not bend and will not interfere with welding. Pressing electrode 11a and pressing electrode 11
When cutting the part 11 in a, it can be easily removed by shifting (moving) the pressing electrode 11a other than the welded part by pulling it in any direction without using a cutter. The other configurations and operations are the same as those in the first embodiment described above, and thus the description thereof is omitted.

Embodiment 3. FIG. 5 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to the third invention and a light emitting device according to the seventh invention. In the second embodiment described above,
Although the four corners were connected in a dot shape, 50
A width of about μm is necessary. Since the dotted connection part is etched, the width may vary.
For example, when the width is wide, when the pressing electrode 11a is pulled, the pressing electrode 11a cannot be easily cut, the welded portion 13 is damaged, and the linear cathode 2 may be broken.

On the other hand, in FIG. 5 showing the present embodiment, the holding electrode 11a formed in a lattice shape and the portion 11 of the holding electrode 11a corresponding to the welded portion 13 of the supporting electrode 6 are They are connected by a half-etched straight line portion 14 which is two sides sandwiching the welded portion 13. Since both ends of the pressing electrode 11 are connected to each other, the pressing electrode 11 does not bend and does not interfere with welding. When cutting the pressing electrode 11a and the portion 11 inside the pressing electrode 11a, the pressing electrode 11a other than the welded portion 11 can be easily removed by bending in any direction without using a cutter. The other configurations and operations are the same as those in the first embodiment described above, and thus the description thereof is omitted.

Fourth Embodiment FIG. 6 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to the fourth invention and a light emitting device according to the eighth invention. In the present embodiment, the holding electrode 11a formed in a lattice shape and the portion 11 of the holding electrode 11a corresponding to the welded portion 13 of the support electrode 6 are
It is connected by a half-etched straight line on one side. Although only one side of the pressing electrode 11 is connected, if the length of the half-etched linear portion (width of the pressing electrode 11) is appropriate, the pressing electrode 11 does not bend and does not interfere with welding.

When cutting the holding electrode 11a and the portion 11 inside the holding electrode 11a, the holding electrode 11a other than the welded portion 11 is easily removed by bending in any direction without using a cutter. it can. Other configurations and operations are similar to those of the first embodiment described above,
The description is omitted.

Embodiment 5. As described in Embodiments 1 to 4, after the linear cathode 2 is welded, the grid-shaped pressing electrode 11a and the portion 11 of the pressing electrode 11a corresponding to the welded portion 13 of the supporting electrode 6 are formed. In the method for manufacturing the light emitting element 1 in which the and are cut, this cutting work restricts the efficiency of the work of the overhead wire work of the linear cathode 2. 9th
The invention proposes a tool for increasing the efficiency of the work of wire-catching the linear cathode 2.

FIG. 7A is a perspective view showing an embodiment of a tool according to the ninth and tenth inventions. This tool has a plurality of rod-shaped teeth 15, which are pressing portions having a pressing surface that should extend along the longitudinal direction of the linear cathode 2, and each of which has a base 1 at the root.
It is fixed by 5a and has a comb shape. The pressing portion (tooth 15) is paired with the base 16 of the pressing portion, and by moving both of them in the direction of the arrow, pressure can be applied to the pressing electrode 11a.

The pressing portion (tooth 15) is formed by welding a portion 13 of the pressing electrode 11a formed in a lattice and the supporting electrode 6 which are overlapped and welded to sandwich the linear cathode 2 therebetween.
The pressing electrode 11a is pressed from above. At this time, stand 1
6 is arranged below the rear panel 1c. In this state, the pressing electrode 11a is sequentially pulled from the tip end direction of the tooth 15 toward the root direction, so that the pressing electrode 1a
Since 1a can be easily cut and removed, this cutting work does not limit the efficiency of the overhead wire work of the linear cathode 2.

Sixth Embodiment FIG.7 (b) is a perspective view which shows the embodiment of the tool which concerns on 11th invention. In this tool, the thickness of the pressing portion of the tool according to the ninth and tenth inventions described in the fifth embodiment in the pressing direction of the teeth 18 increases from the tip to the root. The teeth 18 are fixed by the base 17 at their roots. The pressing part (teeth 18) is
It is paired with the pedestal 19 of the pressing portion, and by moving both of them in the direction of the arrow, pressure can be applied to the pressing electrode 11a. With this tool, the welded portion 13 can be pressed uniformly from above the pressing electrode 11a without bending. Further, deformation due to frequent application of a large force to the root of the tooth 18 does not occur, and the strength of this tool increases,
Stable work is possible for a long time.

Embodiment 7. FIG. 8 is a perspective view showing an embodiment of a tool according to the twelfth invention. In this tool, the teeth 15, 18 of the pressing portion of the tool according to the ninth to eleventh inventions described in the fifth and sixth embodiments have a groove (cut) 20 which should extend along the longitudinal direction of the linear cathode 2. There is.

In the tools according to the ninth to eleventh inventions, it is necessary to surely press the vicinity of the cut portion 21 of the welded portion 13, but by providing the grooves 20 on the teeth 15 and 18, the groove 20 is formed.
It becomes difficult for the linear cathode 2 and the welded portion 13 to come into contact with the inner surface of the, and the pressing force per unit area becomes large, and the welded portion 13 is not damaged when the pressing electrode 11a is pulled in a predetermined direction. The welded portion of the pressing electrode 11a and other portions can be cut. Further, damage to the linear cathode 2 is reduced, and the yield at the time of cutting is improved.

Embodiment 8. FIG. 9 is a block diagram showing a schematic configuration of an embodiment of a display device according to the thirteenth invention. This display device has a luminance signal Y included in a video signal.
And the color difference signal R-Y of the red signal R and the luminance signal Y and the color difference signal BY of the blue signal B and the luminance signal Y are processed and converted by the video signal processing circuit 26 and converted into a red signal R and a green signal. The G and blue signals B are supplied to the display panel drive circuit 27. In the display panel drive circuit 27, the color signals R, G, B are separated for each scanning line of the video signal in synchronization with the horizontal synchronizing signal Hsync, and the separated red signal R ′,
The green signal G'and the blue signal B'are output respectively.

Output from the display panel drive circuit 21,
Color signals R ′, G ′, which are separated for each scanning line of the video signal,
B ′ is given to each data driver 24.
On the other hand, the horizontal synchronizing signal Hsync and the vertical synchronizing signal Vsync are given to the scan driver 25. In the display panel 23, a large number of light emitting elements 1 according to the present invention are arranged, a scan signal is applied from the scan driver 25 to the scan electrodes 3 (FIG. 2), and data is output from the data driver 24 in synchronization with the scan signal. An arbitrary display can be obtained by applying the color signals R ′, G ′, B ′ to the electrode 4 (FIG. 2).

In the above-described embodiment, the linear cathode 2 is mounted on the rear panel 1c, but it is arranged on another panel arranged in the light emitting device in parallel with the rear panel 1c. It is also possible to form a scanning electrode and hang the linear cathode 2 on this panel.

[0057]

According to the method for manufacturing a light emitting device according to the first aspect of the invention and the method for manufacturing a light emitting device according to the fifth aspect of the invention, steps such as cutting and transferring of metal chips are unnecessary, and the manufacturing steps are shortened and the yield is improved. Is possible.

According to the method for manufacturing a light emitting element according to the second aspect of the invention and the method for manufacturing a light emitting element according to the sixth aspect of the invention, when removing the holding electrode while leaving the welded portion, a portion other than the welded portion is required without using a cutter. It can be easily removed by displacing the pressing electrode in any direction, and maintenance of the cutter is unnecessary.

The light emitting device according to the third and fourth inventions and the seventh and eighth inventions
According to the method for manufacturing a light-emitting element according to the invention, when removing the holding electrode leaving the welded portion, without the need for a cutter, it can be easily removed by bending the holding electrode other than the welded portion, No need for cutter maintenance.

According to the tools of the ninth and tenth inventions, when the holding electrode is moved in a predetermined direction, the welded portion of the holding electrode and other portions are cut without damaging the welded portion. can do.

According to the tool of the eleventh aspect of the invention, the welded portion can be pressed uniformly from above the pressing electrode without bending, and the welded portion is damaged when the pressing electrode is moved in a predetermined direction. It is possible to cut the welded portion and the other portion of the pressing electrode without the need.

According to the tool of the twelfth invention, it becomes difficult for the linear cathode and the welded portion to contact the inner surface of the groove, the pressing force per unit area increases, and the pressing electrode is moved in the predetermined direction. At times, the welded portion of the pressing electrode and the other portion can be cut without damaging the welded portion. Also, damage to the linear cathode is reduced, and the yield at the time of cutting is improved.

According to the display device of the thirteenth invention, the manufacturing process of the light emitting element can be shortened and the yield can be improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to a first invention and a light emitting device according to a fifth invention.

FIG. 2 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to a first invention and a light emitting device according to a fifth invention.

FIG. 3 is an explanatory diagram for explaining a state in which each of the supporting electrodes, each of the linear cathodes, and the pressing electrode are welded.

FIG. 4 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to a second invention and a light emitting device according to a sixth invention.

FIG. 5 is an explanatory diagram showing an embodiment of a method for manufacturing a light emitting device according to a third invention and a light emitting device according to the seventh invention.

FIG. 6 is an explanatory view showing an embodiment of a method for manufacturing a light emitting device according to a fourth invention and a light emitting device according to an eighth invention.

FIG. 7 is a perspective view showing an embodiment of a tool according to ninth to eleventh inventions.

FIG. 8 is a perspective view showing an embodiment of a tool according to the twelfth invention.

FIG. 9 is a block diagram showing a schematic configuration of an embodiment of a display device according to a thirteenth invention.

FIG. 10 is a front view of a light emitting element for forming a large screen display device.

11 is a cross-sectional view taken along the line AA of FIG.

FIG. 12 is a perspective view for three-dimensionally explaining the structure of the light emitting element.

FIG. 13 is an explanatory diagram for explaining an automated overhead wire work of the linear cathode.

[Explanation of symbols]

1 light emitting element, 1a phosphor screen, 1c rear panel, 2
Linear cathode, 3 scanning electrodes, 4 data electrodes, 5 phosphors, 6 supporting electrodes, 11 and 11a holding electrodes, 13
Welded portion (welded portion), 14 Half-etched linear portion, 15, 18 Teeth (pressing portion), 15a, 17
Base, 20 notches (grooves), 23 display panel.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ninka Urakawa 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Koji Seko 700 Wada, Ueno-cho, Ise-shi, Mie Ise Electronic Industry Co., Ltd. (72) Inventor Akiju Noro 700 Wada, Ueno Town, Ise City, Mie Prefecture Ise Electronic Industry Co., Ltd. (56) Reference JP-A-6-36712 (JP, A) JP-A-57- 7055 (JP, A) JP-A-7-139925 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 9/02 H01J 9/04 H01J 29/04 H01J 31/15

Claims (13)

(57) [Claims] 1. A linear cathode is regularly arranged on a support electrode which is regularly arranged on a panel facing a phosphor screen, and then the linear cathode is pressed in correspondence with each of the support electrodes. In order to sandwich each of the linear cathodes with each of the supporting electrodes, the pressing electrodes formed in a lattice shape so that after welding each of the supporting electrodes, each of the linear cathodes, and the pressing electrode, A light-emitting device manufactured by removing the pressing electrode while leaving a welded portion. 2. The light emitting element according to claim 1, wherein the pressing electrode formed in a grid shape has a portion to be welded connected to other portions by four points surrounding the portion. 3. The pressing electrode formed in a lattice shape is such that a portion to be welded is connected to other portions by two sides sandwiching the portion, and the two sides are half-etched. Light emitting element. 4. The grid-shaped presser electrode has a portion to be welded that is connected to the other portion by one side.
The light emitting device according to claim 1, wherein the side is half-etched. 5. A linear cathode is regularly arranged on a supporting electrode which is regularly arranged on a panel facing a phosphor screen, and the linear cathode is pressed corresponding to each of the supporting electrodes. In order to sandwich each of the linear cathodes with each of the supporting electrodes, the pressing electrodes formed in a lattice shape so that after welding each of the supporting electrodes, each of the linear cathodes, and the pressing electrode, A method for manufacturing a light emitting device, characterized in that the pressing electrode is removed while leaving the welded portion. 6. The method for manufacturing a light-emitting element according to claim 5, wherein the pressing electrode formed in a grid shape has a portion to be welded connected to other portions by four points surrounding the portion. 7. The pressing electrode formed in a lattice shape is such that a portion to be welded is connected to other portions by two sides sandwiching the portion, and the two sides are half-etched. Method for manufacturing light emitting device. 8. The grid-shaped presser electrode has a portion to be welded which is connected to the other portion by one side.
The method for manufacturing a light emitting device according to claim 5, wherein the side is half-etched. 9. Used in the manufacture of a light emitting device having linear cathodes, which are supported by a plurality of supporting electrodes fixed on a panel facing a phosphor screen and are regularly arranged, and each of said supporting electrodes is provided with the supporting electrodes. Correspondingly, a pressing electrode formed in a lattice shape to press down the linear cathode and the supporting electrode should be pressed from above the pressing electrode so as to overlap and weld the linear cathode so as to sandwich each linear cathode. When a pressing portion and a base to be arranged on the lower side of the panel are provided, the base is arranged on the lower side of the panel , and the pressing portion presses the welded portion from above the pressing electrode. In addition, the shearing force or the pulling force generated by moving the pressing electrode in a predetermined direction is to cut the welded portion and the other portion of the pressing electrode. A tool to do. 10. The comb-shaped pressing portion comprises a plurality of rod-shaped teeth each having a pressing surface that should extend along the longitudinal direction of the linear cathode, and one of the teeth is supported by the base portion.
The listed tool. 11. The pressing part comprises a plurality of teeth having a pressing surface that should extend along the longitudinal direction of the linear cathode, and the thickness in the pressing direction increases from the tip to the root, and the root of the tooth is the base. The tool of claim 9 supported by. 12. The tool according to claim 9, wherein the pressing portion has a groove along the longitudinal direction of the linear cathode. 13. A display device comprising the light emitting device according to claim 1.