JP2012059370A - Bulb type led lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve illuminance directly under a bulb type LED lamp since the bulb type LED lamp is pointed out repeatedly to be insufficient in brightness compared with a conventional incandescent lamp and, in particular, it has become a problem to be inferior in illuminance in illuminating from a ceiling to a floor or from the ceiling to a table top than the incandescent lamp.SOLUTION: The bulb type LED lamp includes a housing cup which has a base for inserting into a socket installed at the bottom and houses an LED driving circuit part, a flat-plate type LED substrate which is arranged in the vicinity of the opening surface of the housing cup, LED chip structures arranged on the LED substrate, and a lens which is arranged straddling over a plurality of LED chip structures.

Description

  The present invention relates to a light bulb type LED lamp.

  In recent years, bulb-type LED lamps have been highly evaluated for their energy saving performance. It is also highly appreciated that LEDs have a long life. The current incandescent bulb is rapidly replacing the bulb-type LED lamp. Since the external shape of the light bulb type LED lamp is the same as that of a conventional incandescent light bulb, it can be replaced with a conventional incandescent light bulb simply by replacing the light bulb. The basic configuration of the bulb-type LED lamp is disclosed in Patent Document 1, for example. In this document, a trumpet-shaped member provided with a base at one end and expanding in a trumpet shape toward the opening at the other end, and a translucent cover having a phosphor layer on the inner surface attached to the opening of the trumpet-shaped member A light bulb type comprising: a substrate provided inside a substantially spherical body formed by the trumpet-shaped member and the translucent cover; and an LED element mounted on an outer surface of the substrate facing the translucent cover. The configuration of the LED lamp is described (see Patent Document 1).

Japanese Patent Laid-Open No. 2001-243807

  However, it has begun to be pointed out that the light bulb type LED lamp is not bright enough compared with the conventional incandescent light bulb. In particular, it has been regarded as a problem that the illuminance illuminating the floor from the ceiling and the surface of the table from the ceiling is inferior to incandescent bulbs. The object of the present invention is to improve the illuminance directly under the light bulb type LED lamp.

  In order to solve the above-mentioned problems, the first invention is provided with a base for insertion into a socket at the bottom, a storage cup for storing the LED drive circuit unit, and a flat plate-like shape disposed near the opening surface of the storage cup Provided is a light bulb-type LED lamp having an LED substrate, an LED chip structure disposed on the LED substrate, and a lens disposed across the plurality of LED chip structures.

  In addition, the second invention is based on the first invention, and further includes a cover for housing the LED substrate, the LED chip assembly, and the lens by matching with the opening edge of the housing cup. I will provide a.

  Further, the third invention is a light bulb type LED lamp further comprising a gel intermediate material made of a transparent gel material disposed between a lens and a plurality of LED chip structures based on the first or second invention. I will provide a.

  Moreover, 4th invention provides the light bulb type | mold LED lamp from which a lens consists of a transparent gel material based on invention of any one of 1st to 3rd.

  Moreover, 5th invention provides the light bulb type | mold LED lamp which a lens arrange | positions in the state of contact | adherence with an LED chip structure by pressing on a cover based on 2nd invention.

  Further, the sixth invention is based on the third invention subordinate to the second invention, the gel intermediate material is a light bulb type LED lamp arranged in close contact with the LED chip structure by being pressed against the cover. provide.

  The seventh invention provides a light bulb-type LED lamp in which the lens is colored and transparent on the basis of any one of the first to sixth inventions.

  The eighth invention provides a light bulb-type LED lamp in which the gel intermediate material is colored and transparent on the basis of any one of the first to seventh inventions.

  Moreover, 9th invention provides the light bulb type LED lamp in which the fluorescent agent or the animal light agent is contained in the lens on the basis of any one invention from 1st to 8th.

  The tenth invention provides a light bulb-type LED lamp in which the gel intermediate material contains a fluorescent agent or an animal light agent on the basis of any one of the first to eighth inventions.

  By adopting the configuration as described above, the illuminance directly under the light bulb-type LED lamp can be significantly improved as compared with the conventional one.

1 is an exploded perspective view showing an example of the shape of a light bulb type LED lamp of Example 1. FIG. The conceptual diagram which shows an example of the arrangement | positioning relationship of the LED board and lens in the light bulb type LED lamp of Example 1 The disassembled perspective view which shows an example of the shape of the lightbulb type LED lamp of Example 2. FIG. Sectional drawing which shows an example of the shape of the light bulb type LED lamp of Example 2

0100 Light bulb type LED lamp 0101 Housing cup 0102 LED substrate 0103 LED chip structure 0104 Lens 0105 Cover

  Examples of the present invention will be described below. The relationship between the embodiments and the claims is as follows. Example 1 mainly relates to claims 1, 2, 4, 5, 7, 9, etc., and Example 2 mainly relates to claims 3, 6, 8, 10, etc. In addition, this invention is not limited to these Examples at all, and can be implemented in various modes without departing from the gist thereof.

  <Overview>

  In this embodiment, lenses are arranged over a plurality of LED chip structures of a conventional light bulb type LED lamp.

  <Configuration>

  The invention of this embodiment is a light bulb-type LED lamp having an accommodation cup, an LED substrate, an LED chip assembly, and a lens. In addition to the above, the bulb-type LED lamp of the present embodiment may have a cover.

  The “accommodating cup” is provided with a base for insertion into the socket at the bottom, and accommodates the LED drive circuit unit.

  The “LED substrate” is a flat plate disposed in the vicinity of the opening surface of the housing cup. In general, an insulating layer is provided on the basis of a material having a relatively high thermal conductivity such as an aluminum plate, and wiring for the LED chip structure is provided on the insulating layer. In some cases, a thermal insulator may be covered on the insulating layer.

  The “LED chip structure” is disposed on the LED substrate, includes a light emitting LED chip, a ceramic substrate on which the LED chip is disposed, and a transparent cover that covers the LED chip disposed on the substrate (in the case of The ceramic substrate is provided with a foot or the like for electrical connection to the conductive land of the LED substrate, and the foot and the electrode of the LED chip are connected to an internal wiring (for example, a wire). Wiring) etc. In the present invention, the LED chip structure may refer to the LED chip itself as it is cut out from the wafer, or to the case where the LED chip cut out from the wafer and the structure as described above are integrated.

  The “lens” is arranged across a plurality of LED chip structures. A lens is a component that aims to optically direct the direction of light in a desired direction, and is made of glass, resin, or the like. In the present invention, a convex lens is preferable because it aims to efficiently deliver light from a bulb-type LED lamp provided downward on the ceiling onto a floor or a table. It is not excluded. Further, it may be a compound lens in which a convex lens and a concave lens are partially fused. The lens material may be a lens using a relatively hard glass or a gel resin having flexibility in addition to a hard plastic. A part in which a hard material and a soft material are partially combined may be used. Further, the lens may be colorless and transparent, or may be colored and transparent. Colored means, for example, red, blue, green, yellowish green, yellow, and so on. The colors may also be combined. For example, half of the lens is red and the other half is green. Further, a fluorescent material or a livestock material may be mixed in all or part of the lens material. As a result, various colors can be realized, and it is possible to continue emitting light even after energization.

  The “bulb-type LED lamp” has the same basic shape as a conventional incandescent bulb. The present invention facilitates the replacement of a conventional incandescent bulb with a bulb-type LED lamp.

  Furthermore, the structure which provides a cover so that a lens may be covered as an additional structure in Example 1 is proposed. If the lens is exposed to the outside, the light from the lens is too strong and it may become dazzling, or the LED chip may appear as a point light source, which may be undesirable in design. Therefore, by covering the lens with a cover and making the cover translucent or having good comparative diffusivity, the lens can be designed to be dazzling or have no design problems. Further, since the lens itself is easily damaged when the lens is a gel-like material, a cover may be used to prevent this damage.

  The “cover” is for accommodating the LED substrate, the LED chip assembly, and the lens by matching with the opening edge of the housing cup. The lens and the cover should be in close contact. This is because the problem that light is weakened by diffused reflection of light between the lens and the cover can be solved. An example of a configuration for bringing the lens and the cover into close contact with each other will be collectively shown in the next embodiment. The cover is generally made of plastic, but glass or other materials may be used. It is convenient to design the cover so that it can be snapped into the opening edge of the receiving cup. In particular, when the cover is snapped into place, the cover presses the gel intermediate material through the lens or the lens, and the force is in close contact with the LED chip assembly (the gel intermediate material will be described in detail in the next embodiment). ).

  FIG. 1 is an exploded perspective view showing an example of the shape of a light bulb type LED lamp of the present embodiment. The bulb-type LED lamp 0100 shown in this figure includes an accommodation cup 0101 (a part of the cap side is not shown. The same applies to FIGS. 3 and 4), an LED substrate 0102, an LED chip assembly 0103, A lens 0104 and a cover 0105 are included. In addition, although the example of the light bulb type LED lamp which has a cover was shown in this figure, as above-mentioned, the light bulb type LED lamp of a present Example does not need to have a cover.

  FIG. 2 is a conceptual diagram showing an example of an arrangement relationship between the LED substrate and the lens in the light bulb type LED lamp of this embodiment, and shows a state in which these are seen in a plan view. Although the number of lenses may be one as in the example shown in FIG. 1, a plurality of LED substrates and lenses may be provided as shown in the figure. In the figure, the bulb-type LED lamp shown in (a) is provided with four substantially circular LED substrates as shown in (a-1). Further, (a-2) shows four lenses. (A-3) shows a state in which the lens shown in (a-2) is placed on the LED substrate shown in (a-1). When a plurality of LED boards are provided, a plurality of lenses may be arranged at corresponding positions on the plurality of LED boards as shown in the figure, or one lens is arranged on the plurality of LED boards. The shape of the LED substrate or the lens is not limited. (B) shows the case where these shapes are substantially rectangular. (B-1) to (b-3) The relationship between each figure is the same as (a-1) to (a-3).

  <Experiment>

  The inventor actually measured the effect of providing a lens using an illuminometer. In the case of a bulb-type LED lamp that does not use a lens, the illuminance at a position 1.5 meters below was 74 lux, whereas in the present invention, it was 119 lux, and an illuminance of about 1.5 times was achieved. I was able to. Both were the same except that the lens was not used and the lens was used.

  <Effect>

  Even in the light bulb type LED lamp that replaces the incandescent light bulb provided on the ceiling according to the present embodiment, the illuminance on the floor surface and the table surface can be improved as compared with the prior art.

  <Overview>

  In this embodiment, a gel intermediate material is further disposed between the lens and the LED chip.

  <Configuration>

  The invention of this embodiment is based on the invention of Embodiment 1, and further a gel intermediate material is disposed between the lens and the LED chip. Since the housing cup, the LED substrate, the LED chip structure, and the lens are the same as those in the first embodiment, description thereof is omitted.

  The “gel intermediate material” is a flat plate using a gel-like material, and is used for the purpose of eliminating or minimizing the gap generated between the light emitting portion of the LED chip and the lens. Another object is to control the heat generated in the LED chip or the LED substrate in a desired direction.

    As a specific material for the gel intermediate material, silicon resin or a basic material in which a secondary material is mixed is used. Moreover, an acrylic gel etc. may be sufficient. Moreover, what packed the silicone gel in the bag-shaped components (For example, what is utilized by breast augmentation surgery) may be used. Furthermore, the gel intermediate material may be colorless and transparent, or may be colored and transparent. Colored means, for example, red, blue, green, yellowish green, yellow, and so on as in the first embodiment. The colors may also be combined. For example, half of the lens is red and the other half is green. Further, a fluorescent material or a livestock material may be mixed in all or part of the lens material. As a result, various colors can be realized, and it is possible to continue emitting light even after energization is completed.

  Further, the LED chip contact portion of the gel intermediate material may be planar, but may be concave to the extent that the LED chip has a high difference. By doing so, there is an advantage that the degree of adhesion between the light emitting portion of the LED chip and the gel intermediate material can be further improved and the unevenness of the LED chip can be reflected to the contact surface with the lens. The lens interface may be bonded in advance with an adhesive or the like, or no adhesive or the like may be used.

  If the gel intermediate material is provided with a recess in accordance with the arrangement of the LED chip, the adhesion with the LED chip can be further improved.

  FIG. 3 is an exploded perspective view showing an example of the shape of the light bulb type LED lamp of the present embodiment. A light bulb-type LED lamp 0300 shown in this drawing includes an accommodation cup 0301, an LED substrate 0302, an LED chip assembly 0303, a gel intermediate 0306, a lens 0304, and a cover 0305. In addition, although the example of the light bulb type LED lamp which has a cover was shown in this figure, the light bulb type LED lamp of a present Example does not need to have a cover. The difference from the bulb-type LED lamp of Example 1 shown in FIG. 1 is that a gel intermediate is provided between the LED chip structure and the lens.

  FIG. 4 is a cross-sectional view showing an example of the shape of the light bulb type LED lamp of the present embodiment, and is a conceptual diagram showing a state in which the light bulb type LED lamp is cut vertically at the approximate center. (A) shows the decomposition | disassembly state similar to FIG. 3, (b) couple | bonds with the shape of the bulb-type LED lamp at the time of use. In order to perform this connection suitably, it is convenient if the cover is designed so that it can be snapped into the opening edge of the receiving cup. In the example of this figure, as an example of such a configuration, the cover 0405 having elasticity is provided. A claw 0405a that is folded slightly inward is provided at the end of the lip, and the claw is inserted inside the opening edge 0401a of the receiving cup 0401 so that it can be snapped by a biasing force in the outer peripheral direction. Showed things. The example of this figure is an example, and other shapes may be used as long as it can be snapped in.

  And in the state of the light bulb type LED lamp at the time of use shown in (b), the gel intermediate body is deformed along the shape of the LED chip structure on the LED substrate, and the gel intermediate body and the LED substrate / LED chip structure are The gap (first gap 0410) can be hardly generated. For this purpose, it is desirable that the material for the gel intermediate is as soft as possible so that it can be deformed along the shape of the LED chip structure. Further, the gap (second gap 0420) between the gel intermediate and the lens can be almost eliminated by making the respective facing surfaces substantially flat. Further, for the gap between the lens and the cover (third gap 0430), the inner surface shape of the cover is formed in accordance with the outer surface shape of the lens (the lens is formed so as to be closely adhered when the cover is placed on the lens). Thus, this gap can be almost eliminated. With the above configuration, there is almost no gap (air layer) in the cover, and the problem that light is weakened by irregular reflection of light in the cover can be solved. As mentioned in the previous embodiment, the configuration for eliminating the gap between the lens and the cover (third gap) is the same as that in the previous embodiment.

  <Effect>

  According to the present embodiment, the light of the light bulb type LED lamp can be efficiently delivered to the floor surface or the table surface.

Claims (10)

A base for inserting the socket into the socket at the bottom, a storage cup for storing the LED drive circuit unit,
A flat LED substrate disposed near the opening of the housing cup;
An LED chip structure disposed on the LED substrate;
A lens arranged across a plurality of LED chip structures;
A bulb-type LED lamp having   The bulb-type LED lamp according to claim 1, further comprising a cover that accommodates the LED substrate, the LED chip assembly, and the lens by matching with an opening edge of the accommodation cup.   The light bulb-type LED lamp according to claim 1 or 2, further comprising a gel intermediate material made of a transparent gel material disposed between the lens and the plurality of LED chip structures.   The light bulb type LED lamp according to any one of claims 1 to 3, wherein the lens is made of a transparent gel material.   The bulb-type LED lamp according to claim 2, wherein the lens is disposed in close contact with the LED chip structure by being pressed by the cover.   4. The light bulb-type LED lamp according to claim 3, wherein the gel intermediate material is arranged in close contact with the LED chip structure by being pressed against the cover.   The bulb-type LED lamp according to any one of claims 1 to 6, wherein the lens is colored and transparent.   The bulb-type LED lamp according to any one of claims 1 to 7, wherein the gel intermediate material is colored and transparent.   The bulb-type LED lamp according to any one of claims 1 to 8, wherein the lens contains a fluorescent agent or a daylighting agent.   The bulb-type LED lamp according to any one of claims 1 to 8, wherein the gel intermediate material contains a fluorescent agent or a daylighting agent.