JPH11163421A - Light source device and display device - Google Patents

Abstract

(57) [Problem] To prevent erroneous assembly in which the polarity of a light source is erroneously assembled, and to improve both heat resistance and light diffusion. A lamp insertion hole into which an LED is inserted.
a, a socket body 2 formed with a pair of lead wire insertion holes 5a and 5b through which a pair of lead wires 6a and 6b are inserted, and a pair of bottom opening portions 7a and 7b communicating with the holes and opening to the outside; And a lamp cover 12 having a light diffusion property and heat resistance for covering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device and a display device suitable for a lamp for illuminating an in-vehicle meter, a warning light, and the like.

[0002]

2. Description of the Related Art Conventionally, as an example of a light source device such as an in-vehicle meter and a warning light, a device disclosed in Japanese Utility Model Publication No. 57-48281 is known.

[0003] This light source device is a backlight for illuminating the meter panel from the back. The light source device comprises a socket body made of a synthetic resin or the like and a small non-base bulb attached thereto.
The life and brightness,
There are various problems with temperature and the like, and there is a problem that it is difficult to realize maintenance-free.

Therefore, it is conceivable to replace the incandescent lamp with a light-emitting diode (hereinafter referred to as an LED) having a long life, high luminance, and excellent cold resistance and heat resistance as a light source to achieve maintenance-free operation.

[0005]

However, such a conventional light source device uses a non-polar incandescent lamp as a light source, and thus does not have a configuration in consideration of the polarity of the light source. For this reason, in a case where an LED having a polarity is simply assembled to such a conventional lighting device, the LE is required.
There is a possibility that erroneous assembling of D with wrong polarity on the lighting circuit board may occur.

[0006] Further, although the amount of heat generated by the LED is smaller than that of the incandescent lamp, it is somewhat large. Therefore, when the LED is arranged close to the meter panel in order to make the vehicle-mounted meter including the light source device thinner, this LED is used. The heat generated by the LEDs heats the meter panel and raises the temperature. Therefore, it is necessary to increase the heat resistance of the meter panel and the socket body, resulting in an increase in cost. Further, since the light emission of the LED has high directivity, LE
There is a problem that the illuminated surface is narrowed by bringing D close to the meter panel.

The present invention has been made in view of such circumstances, and its purpose is to prevent erroneous assembly in which the polarity of a light source is erroneously assembled while improving heat resistance and light diffusion. It is an object of the present invention to provide a light source device and a display device that can perform the above-described operations.

[0008]

According to a first aspect of the present invention, there is provided a light source device comprising: a light source having a pair of leads; a light source insertion hole into which the light source is inserted; and a pair of leads for supplying power to the light source. A socket body having a pair of lead wire insertion holes and a pair of openings communicating with the lead wire insertion holes and opening to the outside; and a light diffusion and heat resistant lamp cover for covering the light source. It is characterized by the following.

According to the present invention, since the light from the light source such as the LED is diffused by the lamp cover, the illuminated surface can be enlarged. Further, heat resistance to heat from the light source can be improved by the lamp cover. Therefore, when assembling the light source device to a vehicle-mounted meter panel or the like, the light source device can be disposed close to the meter panel to reduce the thickness.

A light source device according to a second aspect of the present invention is characterized in that the pair of external openings of the socket body are formed to have mutually different shapes.

According to the present invention, in addition to the function of the first aspect of the invention, since the shape of the pair of external openings of the socket body is different from each other, the shapes of the external openings correspond to the polarities of the LED or the like in advance. By doing so, it is possible to know the polarity of these external openings by visual inspection. For this reason, it is possible to prevent erroneous assembly in which the polarity of a light source such as an LED is erroneous.

A light source device according to a third aspect of the present invention is characterized in that the light source device has a wire sleeve having a diameter larger than that of a lead wire for fixing a pair of lead wires of a light source by inserting the lead wires into respective insertion holes.

According to the present invention, in addition to the function of the first or second aspect of the present invention, each lead wire of a light source such as an LED is inserted and fixed in the insertion hole of a wire sleeve having a larger diameter. Accordingly, each lead wire can be easily and quickly increased to the diameter of the wire sleeve. For this,
It can be easily assembled to, for example, a device dedicated to a bi-pin lamp that requires a thick lead wire. In addition, since it is not necessary to newly design a light source such as an LED to which a thick lead wire is attached in advance or to update manufacturing equipment, cost can be reduced.

Furthermore, if the lead wire of the light source itself is thick, cracks or breakage are likely to occur at the sealing end of the lead wire during bending due to its rigidity. Since it is not thick, cracking or breakage of the lead wire sealing end due to the bending can be prevented.

According to a fourth aspect of the present invention, there is provided a display device according to any one of the first to third aspects, a display unit illuminated by the light source device, and a device body accommodating the light source device and the display unit. ; Characterized by having;

According to the present invention, since the light source device according to any one of claims 1 to 3 is provided, substantially the same operation and effects as those of the light source device are achieved, and the light source device is provided on the display unit as described above. Since the display devices can be arranged close to each other, the display device can be reduced in size or thickness.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
A description will be given based on FIG.

FIG. 1 is a perspective view of a light source device 1 according to a first embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is a plan view of FIG. The light source device 1 has a lower portion of an LED (light emitting diode) 3 having a polarity on a substantially central portion of a horizontally long prismatic socket body 2 made of a synthetic resin such as an elastic insulating material such as silicon rubber. A lamp insertion hole 3a with a bottom is formed for insertion with some play. A cylindrical collar 4 is integrally and concentrically protruded from the periphery of the opening of the lamp insertion hole 3a.
A concentric annular gap 4a is formed between the inner peripheral surface of the LED 3 and the outer peripheral surface of the LED 3.

As shown in FIG. 2, the socket body 2 has a pair of left and right central lead wire insertion holes formed of a square hole or a round hole which penetrates substantially vertically from the lower bottom surface of the lamp insertion hole 3a to the lower bottom surface of the socket body 2. 5a and 5b are formed, and a pair of left and right lead wires 6a and 6b of the LED 3 are inserted into the insertion holes 5a and 5b.

In the lower bottom surface of the socket body 2, a pair of left and right bottom openings 7a and 7b, which are external openings of a pair of left and right center lead insertion holes 5a and 5b, are opened, and the lower bottom width direction intermediate portion. A bottom groove 7 which penetrates at a predetermined width in the longitudinal direction at the portion and opens downward in FIGS. Further, a pair of left and right side concave grooves 8 and 9 having a shallow groove depth and a pair of left and right upper concave grooves 10 and 11 respectively communicating therewith are formed on both longitudinal side surfaces and the upper surface of the socket body 2. Has formed. These pair of left and right side concave grooves 8 and 9
Are open outward, and the upper grooves 10, 11 open upward, and a pair of left and right side grooves 8, 9 and the upper grooves 10,
A pair of left and right lead wires 6a and 6b bent into an inverted L-shape are inserted into the inside 11 and terminate in the respective upper concave grooves 10 and 11.

In the annular gap 4a between the LED 3 and the collar 4, the lower end of the opening of the cylindrical lamp cover 12 made of silicon resin or the like having light diffusion and heat resistance is closely fitted, and an adhesive or the like is inserted. , And the outer surface of the LED 3 is covered with a lamp cover 12. The lamp cover 12 has an inwardly convex curved portion 12a integrally formed on the inner surface of the upper lid portion to improve light diffusivity, and has a curved top surface formed by LE.
The LED 3 is firmly fixed by elastically contacting the top surface of the dome-shaped curved surface of D3.

Therefore, according to the light source device 1, L
Since the light from the ED 3 is diffused by the lamp cover 12, the illuminated surface can be enlarged. LED3
The heat resistance against heat generation of the lamp cover 12 can be improved by the lamp cover 12.

FIG. 4 is a longitudinal sectional view of a main part of a second embodiment of the present invention, in which the light source device 1 is mounted on a substrate 13 on which a lighting circuit (not shown) of the LED 3 is mounted. It shows a longitudinal section.

That is, the light source device 1 is mounted on a pair of left and right solder lands 14a and 14b as shown in FIG. Solder 15 is added to the outer surfaces of the pair of left and right lead wires 6a, 6b, which are housed in the upper grooves 10, 11 and the side grooves 8, 9, respectively, which are exposed to the outside. Each of the lead wires 6a, 6b is electrically connected to each of the solder lands 14a, 14b, and the light source device 1 itself is directly fixed on the substrate 13.

That is, a pair of left and right lead wires 6 of the LED 3
The tips of a and 6b are respectively housed in a pair of left and right upper concave grooves 10 and 11 opening upward in FIG. 4 of the socket body 2 and a pair of left and right side concave portions 8 and 9 opening outward. Is exposed to the outside, and by adding solder 15 to the exposed outer surface, the lead wires 6a and 6b can be electrically connected to the solder lands 14a and 14b of the substrate 13, respectively. The light source device 1 itself can be directly fixed on the substrate 13.

FIG. 5 is a longitudinal sectional view of a light source device 1A according to a third embodiment of the present invention, FIG. 6A is a plan view thereof, and FIG.
Is a bottom view of the same. The light source device 1A is an external opening which is open at the bottom surface of the socket body 2A by communicating with a pair of left and right central lead wire insertion holes 5c and 5d into which a pair of left and right lead wires 6c and 6d of the LED 3 are inserted. It is characterized in that the shapes of the pair of central bottom openings 16a and 16b are formed in different shapes.

That is, the light source device 1A has the resistor 17 interposed in advance in the longitudinal middle part of one of the pair of left and right lead wires (left side in FIG. 5) 6c of the LED 3, and the left side of the socket body 2A. The central lead wire insertion hole 5c is formed so as to have a large diameter so as to accommodate the resistor 17, so that it is an external opening communicating with the left central lead wire insertion hole 5c (in FIGS. For example, the diameter of the circular central bottom opening 16a is set to the outside of the other (right side) communicating with the other (right in FIGS. 5 and 6) central lead wire insertion hole 5d through which the other lead wire 6d is inserted. The diameter of the opening 16b is larger than the diameter of the opening 16b.

The socket body 2A is provided with a pair of left and right side lead wire insertion holes 18 and 19 penetrating in the thickness direction outside the pair of left and right central lead wire insertion holes 5c and 5d, respectively. Has been established. The pair of left and right side lead wire insertion holes 18 and 19 are, for example, rectangular rectangular holes having different sizes in plan view, and have a pair of left and right rectangular side bottom openings 18a, which are external openings on the bottom side. On the top side, a pair of left and right rectangular side top openings 18b, 1a are provided.
9b.

As shown in FIG. 6 (A), the upper surface of the socket body 2A is formed with shallow upper surface concave grooves 20b and 21b communicating with the side upper surface openings 18b and 19b, respectively. On the bottom surface of the socket body 2A, each central bottom opening 16a, 16b is provided with each side bottom opening 18a, 19b.
a of the bottom groove 20a, 2 having a shallow groove depth communicating with each other.
1a are formed.

That is, as shown in FIGS. 6A and 6B, the side bottom opening 18a and the side top opening 18b on the left side in the figure are provided.
Are the right side opening 19a and the right side opening 19a in the figure.
It is formed in a rectangle larger than b.

Therefore, according to the light source device 1A,
A pair of left and right side top openings 18b, 1 of the socket body 2A
9b are different in size on the left and right, and a pair of left and right central bottom openings 16a, 16b and side bottom openings 18 are provided.
Since the sizes of a and 19a are different between the left and right sides, by associating these magnitudes with the polarities of the lead wires 6c and 6d of the LED 3 in advance, erroneous assembling to erroneously assemble the polarities can be performed easily and reliably. Can be prevented.

FIG. 7 is a perspective view of a main part of a third embodiment of the present invention, which shows a pair of lead wires 6a and 6b of the LED 3.
The insertion holes 22a, 2 of a pair of left and right nickel sleeves 22, 23, each of which is a wire sleeve having an outer diameter larger than this.
It is characterized in that the outer diameter of the pair of lead wires 6a and 6b can be easily and quickly increased by being inserted into the inside 3a and fixed by crimping, soldering, welding or the like. The pair of left and right nickel sleeves 22 and 23 are fixed at their axially intermediate portions at predetermined intervals in the left and right direction by a socket body 24 formed in a required shape such as a cylindrical shape with nylon resin or the like. ing.

Therefore, it can be easily assembled to, for example, a device dedicated to a bi-pin lamp that requires a thick lead wire. In addition, L
Since it is not necessary to newly design a light source such as an ED or to update a manufacturing facility, it is possible to reduce costs. Further, if the lead wires 6a and 6b of the LED 3 are thick,
Due to its rigidity, cracks or breakage may occur at the sealed ends of the lead wires 6a, 6b during bending, but the lead wires 6a, 6b of the present embodiment themselves are not thick, so the lead wires caused by the bending It is possible to prevent cracks and breakage of the sealing ends of 6a and 6b.

[0034]

As described above, according to the first aspect of the present invention, since the light from the light source such as the LED is diffused by the lamp cover, the illuminated surface can be enlarged.
Further, heat resistance to heat from the light source can be improved by the lamp cover. Therefore, when assembling the light source device to a vehicle-mounted meter panel or the like, the light source device can be disposed close to the meter panel to reduce the thickness.

According to the second aspect of the present invention, in addition to the function of the first aspect of the present invention, since the shape of the pair of external openings of the socket body is different from each other, the shape of the external openings is changed to LE.
By associating in advance with the polarity such as D, the polarity can be known by visual inspection of the shape of these external openings. For this reason, it is possible to prevent erroneous assembly in which the polarity of a light source such as an LED is erroneous.

According to the third aspect of the present invention, in addition to the operation of the first or second aspect, each lead wire of the light source such as an LED is inserted into the insertion hole of the wire sleeve having a larger diameter. By fixing, each lead wire can be easily and quickly thickened to the diameter of the wire sleeve. For this reason, it can be easily assembled to, for example, a device dedicated to a bi-pin lamp that requires a thick lead wire. Also,
Since it is not necessary to newly design a light source such as an LED to which a thick lead wire is attached in advance, or to update manufacturing equipment,
Cost can be reduced. Furthermore, if the lead wire of the light source itself is thick, its rigidity may cause cracks or breakage at the sealed end of the lead wire during bending, but the lead wire itself of the present invention is not thick. Thus, cracks or breakage of the lead wire sealing end due to the bending can be prevented.

According to the fourth aspect of the present invention, since the light source device according to any one of the first to third aspects is provided, substantially the same operation and effect as those of the light source devices can be obtained. Since the display device can be arranged close to the display portion, the display device can be reduced in size or thickness.

[Brief description of the drawings]

FIG. 1 is a perspective view of a light source device according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a longitudinal sectional view of a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a light source device according to a third embodiment of the present invention.

6A is a plan view of the light source device shown in FIG. 1, and FIG.
Is the same bottom view.

FIG. 7 is a perspective view of a main part of a fourth embodiment of the present invention.

[Explanation of symbols]

 1, 1A light source device 2, 2A socket body 3 LED 3a Lamp insertion hole (light source insertion hole) 5a, 5b A pair of lead wire insertion holes 6a, 6b A pair of lead wires 7 Bottom groove 8, 9 A pair of side groove 10, 11 A pair of upper concave grooves 12 A lamp cover 13 A substrate 16a, 16b A pair of central bottom opening 18a, 19a A pair of side bottom opening 18b, 19b A pair of side top opening

Claims (4)

[Claims] A light source having a pair of lead wires; a light source insertion hole into which the light source is inserted; a pair of lead wire insertion holes through which a pair of power supply leads of the light source are inserted; A light source device comprising: a socket body having a pair of openings that open to the outside; and a light-diffusing and heat-resistant lamp cover that covers the light source. 2. The light source device according to claim 1, wherein the pair of external openings of the socket main body are formed in mutually different shapes. 3. The light source device according to claim 1, further comprising a wire sleeve having a diameter larger than that of a lead wire for inserting and fixing a pair of lead wires of the light source into the insertion holes. 4. A light source device according to claim 1, further comprising: a display unit illuminated by the light source device; and a device main body containing the light source device and the display unit. Display device.