JPH08203421A - Display element of large-sized image display - Google Patents

Abstract

PURPOSE: To shorten a lead wire, and facilitate the set-up of a lamp and a lamp case, and facilitate the engagement between a connector part and a socket, and prevent solder cracks. CONSTITUTION: A lead wire 3, at the surface of a lam case 7 covering the rear from a light emission part 1, and land parts 11 and 12, in the vicinity of the base of the lead wire 3 and 5, are provided, and from there, a conductive pattern 10 is trained to a card edge type of connector 8. At that time, the direction of through holes 13 and 14 are made not to stand side by side on one straight line with the lead end of the lead wires 3 and 5 or the lead wires 3 and 5 are slackened intentionally so that the sections where the lead wires 3 and 5 may not bring about hindrances such as solder cracks, etc., by the expansion and shrinkage by stress or heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display element used in a large image display device.

[0002]

2. Description of the Related Art Conventionally, a display element of a large-sized image display device of this type is disclosed in, for example, Japanese Patent Laid-Open Nos. 1-206556 and 1-315787. this is,
As shown in FIGS. 4 and 5, the front part has a light emitting part a and the rear part has a glass tube b. The light emitting part a and the glass tube b are provided with lead wires c and d, respectively, and the glass tube b is covered to emit light. A pin e connecting the lead wires c and d is buried in the rear end surface of the lamp case f connected to the portion a to form a display element. Lead wires c and d connected to the light emitting portion a and the glass tube b
Is wired inside the lamp case f,
It penetrates through a hole g formed in the rear part, appears outside the lamp case f, and is connected to the pin e by lapping or soldering. A large number of display elements having such a configuration are arranged in a matrix on the display unit h to form a large-sized image display device.

[0003]

However, in the display element of the above-mentioned conventional large-sized image display device, when the number of pins per display element is large, the inside of the lamp case is wired so that the lead wires do not come into contact with each other. There was a problem that it was difficult to do. In addition, since there are many pins per display element, there is a hole for penetrating the lead wire from the inside of the lamp case to the surface near the connector part at the rear of the lamp case, and this hole corresponds to each lead wire. In some cases, it was difficult to penetrate the lead wire into the hole. Further, when the number of pins per display element is large, there is a problem that it is difficult to fit the socket connected to the substrate for supplying power to the lamp and the connector portion of the lamp case. Furthermore, there is a problem that it is difficult to wrap when the pin spacing is small.

The present invention solves the above-mentioned conventional problems, and provides a display element of an excellent large-sized image display device capable of eliminating the difficulty in assembling the display element with a lamp and a lamp case. The purpose is.

Another object of the present invention is to provide a display element for an excellent large-sized image display device which can eliminate the difficulty in fitting the display element with a socket connected to a substrate. Is.

Another object of the present invention is to provide a display element of an excellent large-sized image display device having a structure for preventing troubles such as solder cracks due to expansion and contraction due to stress or heat applied to a soldered portion. Is.

[0007]

In order to achieve the above-mentioned object, the present invention has a lamp case having a light emitting portion joined to a front portion thereof and a connector portion detachably connected to a socket provided on a substrate at a rear portion thereof. On the surface of this lamp case,
A plurality of lands for respectively connecting a plurality of lead wires led out from the inside of the lamp case to the outside through the through holes, and a plurality of conductive patterns for respectively connecting these lands and the terminal part of the connector part are provided. It is a thing.

[0008]

Therefore, according to the present invention, the lead wire can be shortened by providing the land near the root of the lead wire, and the lead wire is soldered to the land by providing the conductive pattern for connecting the land and the connector portion. By attaching it, it is not necessary to wire the lead wire inside the lamp case to the vicinity of the connector part at the rear of the lamp case, and it is not necessary to wrap even if the connector part is a pin and the space between the pins is narrow. The display element is easy to assemble.

Further, according to the present invention, the connector portion is integrally molded in a card edge type with the same heat-resistant resin material as the lamp case covering the rear portion of the display element, so that a substrate for supplying power to the display element can be obtained. It is possible to easily fit the socket connected to the connector and the connector portion.

Further, according to the present invention, in the lamp case, the wiring path of the lead wire to the land or the arrangement of the land is arranged so that the shape of the lead wire from the root of the lead wire to the land to which the lead wire is soldered is a straight line. By avoiding this, it is possible to prevent the occurrence of troubles such as solder cracks due to stress applied to the soldering portion of the lead wire to the land or expansion and contraction due to heat.

Further, according to the present invention, even when a structure for preventing a failure such as a solder crack in the lamp case cannot be realized, the lead wire is processed from the root of the lead wire to intentionally sag, and the solder is similarly soldered. It is possible to prevent the occurrence of obstacles such as cracks.

[0012]

【Example】

(Embodiment 1) Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of a display element and a socket used in a large-sized image display device according to a first embodiment of the present invention, in which 1 is a light emitting portion, and a plurality of anodes 2 are penetrated to the back side inside the upper and lower ends thereof. A lead wire 3 is connected to each anode. Reference numeral 6 denotes a glass tube that is adhesively sealed on the back surface of the light emitting section 1, and has a cathode (heater) 4 disposed therein. The cathode 4 penetrates the end of the glass tube 6 on the side opposite to the light emitting section 1. It is connected to the lead wire 5. Reference numeral 7 denotes a rectangular cylindrical lamp case integrally formed of a heat-resistant resin material, and one end of the lamp case 7 is closely adhered to the back surface of the light emitting unit 1 to form a display element.

Reference numeral 8 is a substrate 1 for supplying power to this display element.
It is a connector portion that fits into the socket 18 connected to the lamp case 7, and is formed integrally with the lamp case 7. The terminal portion 9 in the connector portion 8 contacts the contactor 19 of the socket 18 as an extension of the conductive pattern 10. The other ends of the conductive pattern 10 are lands 11 and 12, and the lead wires 3 and 5 are soldered thereto. Reference numerals 13 and 14 are through holes through which the lead wires 3 and 5 pass. Lands 11 and 12 are
The through holes 13 and 14 are formed on the slope of the lamp case,
Since it is formed perpendicular to this slope, the through holes 13, 1
The orientation of 4 is different from the orientation of the lead wires 3, 5.
These structures are provided on the upper surface and the lower surface of the lamp case 7. Reference numerals 15 and 16 refer to the lead wires 3 and 4 and the through hole 1
It is a mortar-shaped guide for making it easy to pass through the holes 3 and 14.

FIG. 2 is a view of the display element as seen obliquely from the rear.
Reference numeral 20 denotes a flange, which is a flat surface portion which is provided in the middle of the front and rear of the lamp case 7 and which is provided to ensure a fitting with a display unit (not shown) and which is continuous all around.
Reference numeral 21 denotes a fitting portion for the display unit, and triangular protrusions 22 are provided on the left and right surfaces to prevent the falling off. Two
Reference numeral 3 is a notch for preventing an erroneous insertion when the socket 18 (17, 18 is shown in FIG. 1) connected to the substrate 17 for supplying power to the display element is fitted.

Next, the operation of the first embodiment will be described. In assembling the lamp including the light emitting part 1 and the glass tube 6 and the lamp case 7, first, the lead wires 3 and 5 are straightened, and the lamp case 7 is attached so as to cover the glass tube 6 on the back surface of the lamp. At this time, the lead wires 3 and 5 are guided to the through holes 13 and 14 by the guides 15 and 16 provided inside the lamp case 7, and when the back surface of the lamp light emitting portion 1 and the front end of the lamp case 7 come into contact with each other, It is on the outside of 7. The lamp and the lamp case 7 can be assembled by bending the portions of the lead wires 3 and 5 protruding outside the lamp case 7 and soldering them to the lands 11 and 12, respectively. After that, the connector portion 8 may be inserted into the socket 18.

As described above, according to this embodiment, the lead wires 3 and 5 are not extended directly to the connector portion 8 and the conductive pattern 10 is interposed in the middle thereof, so that the lead wires 3 and 5 can be shortened. Since the lead wires 3 and 5 are soldered to the lands 11 and 12 at the ends of the conductive pattern 10,
The display element can be easily assembled and the connector 8
Is a card edge type, it has an effect that when the number of anodes is large, the connection to the socket 18 on the substrate 17 is easier to fit than in the case of a pin type. Also,
Lands 11 and 12 are formed on the slope of the lamp case 7,
Since the through holes 13 and 14 are formed perpendicular to the slope,
The shape of the lead wires 3 and 5 after soldering is not bent and does not form a straight line, and stress is applied to the soldering part.
It has an effect of preventing a failure such as a solder crack due to expansion and contraction due to heat or the like.

(Embodiment 2) FIG. 3 shows the configuration of a second embodiment of the present invention. In this embodiment, the lands 11, 1
To prevent failure such as stress on the soldering part and solder cracks due to expansion and contraction due to heat etc. when it is unavoidable to arrange 2 in a position aligned with the lead-out ends of lead wires 3 and 5. In addition, each of the lead wires 3 and 5 is provided with a concave intentional slack 24. According to the present embodiment, the intentional slack 24 serves to absorb the stress caused by the lead wires 3 and 5 such as expansion and contraction, and thus has an effect of preventing an obstacle such as a solder crack.

In the first embodiment, if the number of anodes is small and the connection to the socket 18 on the board 17 can be easily performed, the connector portion 8 may have a pin shape.

Further, in the second embodiment, the intentional slack 24 is caused by the lead wires 3 and 5 which expand or contract due to heat or the like.
Since it suffices to absorb the stress caused by the above, it may be a "V" shape, a semicircular shape, or a corrugated shape instead of the concave shape shown in FIG.

[0020]

The present invention has the following effects, as is apparent from the above embodiments. (1) By providing a through hole for leading the lead wire to the outside of the lamp case near the root of the lead wire and providing a land near the through hole, the lead wire can be shortened and the assembly becomes easy. (2) Since the lead wire is soldered to the land, the lead wire can be electrically connected to the connector portion through the conductive pattern even when lapping is difficult due to the large number of pins. (3) By making the connector part a card edge type, it is possible to easily fit the socket for supplying power to the lamp. (4) By arranging the through holes or lands so that the lead wires after soldering do not have a straight shape, it is possible to prevent failures such as solder cracks due to stress or expansion / contraction. (5) Even if the through hole or land cannot be arranged so that the shape of the lead wire after soldering is not straight,
By intentionally slackening the lead wires, it is possible to prevent failures such as solder cracks due to stress or expansion / contraction.

[Brief description of drawings]

FIG. 1 is a sectional view of a large-sized image display device according to a first embodiment of the present invention in which a display element is fitted in a socket on a substrate.

FIG. 2 is an external perspective view of the display element of the large-sized image display device according to the first embodiment of the present invention as viewed from the rear.

FIG. 3 is a sectional view of a main part of a display element of a large-sized image display device according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a display element of a conventional large-sized image display device.

FIG. 5 is an external perspective view of a display element of a conventional large-sized image display device as viewed from the rear.

[Explanation of symbols]

 1 light emitting part 3 lead wire for anode 5 lead wire for cathode 6 glass tube 7 lamp case 8 connector part 10 conductive pattern 11, 12 lands 13, 14 through hole 17 substrate 18 socket 24 intentional slack

Claims (4)

[Claims] 1. A lamp case is provided, which has a light emitting portion joined to a front portion thereof and a connector portion detachably connected to a socket provided on a substrate at a rear portion thereof.
A plurality of lands for respectively connecting a plurality of lead wires led out from the inside of the lamp case to the outside through the through holes, and a plurality of conductive patterns for respectively connecting these lands and the terminal part of the connector part are provided. A display element for a large image display device. 2. The connector part is formed of a heat-resistant resin material integrally with the lamp case in a card-edge type, and the terminal part is integrally formed with the conductive pattern in a planar shape. Display element of the large image display device of. 3. The large-sized image display device according to claim 1, wherein the through hole for leading out the lead wire to the outside of the lamp case is formed so as not to be aligned with the lead-out end of the lead wire. Display element. 4. The display element of a large-sized image display device according to claim 1, wherein the lead wire is soldered to the land while being slackened inside the lamp case.