KR20100036029A - Light emitting device - Google Patents

Light emitting device Download PDF

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Publication number
KR20100036029A
KR20100036029A KR1020080095456A KR20080095456A KR20100036029A KR 20100036029 A KR20100036029 A KR 20100036029A KR 1020080095456 A KR1020080095456 A KR 1020080095456A KR 20080095456 A KR20080095456 A KR 20080095456A KR 20100036029 A KR20100036029 A KR 20100036029A
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KR
South Korea
Prior art keywords
light emitting
fluorescent
cover
fluorescent cover
light
Prior art date
Application number
KR1020080095456A
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Korean (ko)
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KR101544444B1 (en
Inventor
반희정
신선웅
Original Assignee
서울반도체 주식회사
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Priority to KR1020080095456A priority Critical patent/KR101544444B1/en
Publication of KR20100036029A publication Critical patent/KR20100036029A/en
Application granted granted Critical
Publication of KR101544444B1 publication Critical patent/KR101544444B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched

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Abstract

The present invention can easily implement a white light by detachably forming a fluorescent cover including a fluorescent material in the exit region from which the light emitted from the light emitting chip is emitted, and can implement a variety of colors by selectively attaching a fluorescent cover to the exit port. A light emitting device according to an embodiment of the present invention includes a substrate on which at least one light emitting chip is mounted; A housing on which the substrate is mounted and at least one exit hole for emitting light emitted from each of the light emitting chips is formed; A fluorescent material is mixed and formed, and includes a fluorescent cover part detachably provided in the housing to cover at least one or more exit holes.

Light emitting chip, light emitting diode, light emitting element, fluorescent cover, fluorescent material

Description

Light emitting device {LIGHT EMITTING DEVICE}

The present invention relates to a light emitting device, and more particularly, white light can be easily realized by detachably forming a fluorescent cover including a fluorescent material in an emission region in which light generated from a light emitting chip is emitted. The present invention relates to a light emitting device that can implement various colors by attaching a fluorescent cover.

In general, the display device using the light emitting diode can be designed freely according to the request of the user (CUSTOMER), it is possible to display that can fully reproduce all the functions to be expressed. Therefore, a display device using a light emitting diode is used as a display device of various industrial devices including a display, a VCR, a DVD, a microwave oven, and a display of a white household appliance including a refrigerator, a washing machine, and an air conditioner.

In the display device using the light emitting diode, a plurality of light emitting diodes are mounted on a printed circuit board, a housing on which the printed circuit board is mounted is provided, and a plurality of reflection holes through which light emitted from the light emitting diode is emitted are formed on the housing. do. Then, a display film on which letters, numbers, symbols, and patterns are printed is disposed on one side of the housing according to the request of the orderer.

In this case, in order to implement the light emitted from the light emitting diode as white light, a method of attaching a sheet coated or mixed with phosphor on one surface of the housing, that is, one surface in the direction in which the display film is disposed has been generally used.

However, since the phosphor sheets coated or mixed with phosphors are expensive, they contribute to increase the production cost of the product, and although they are expensive, there is a problem that the reliability of the white light is poor.

The present invention has been made to solve the above-mentioned conventional problems, and implements a variety of light, including white light without using a phosphor sheet used to implement white light in a display device used in various home appliances, excellent light emission The purpose is to provide a device.

A light emitting device according to a first embodiment of the present invention for achieving the above object is a light emitting chip; A reflector surrounding the light emitting chip and having an exit port through which light is emitted; And a fluorescent cover which is formed by mixing a fluorescent material and is detachably provided to the reflector so as to cover the exit port.

In addition, it is preferable that at least one detachment means is provided at a contact portion of the fluorescent cover and the reflector.

The desorption means includes a desorption protrusion protruding from the fluorescent cover; It is formed in the reflector of the point corresponding to the protrusion is characterized in that the removal groove is a detachable projection.

In addition, the fluorescent cover is characterized in that the fluorescent material is mixed with the transparent resin is formed.

A light emitting device according to a second embodiment of the present invention includes a substrate on which at least one light emitting chip is mounted; A housing on which the substrate is mounted and at least one exit hole for emitting light emitted from each of the light emitting chips is formed; A fluorescent material is mixed and formed, and includes a fluorescent cover part detachably provided in the housing to cover at least one or more exit holes.

In this case, the fluorescent cover part is made of one fluorescent cover body to cover a plurality of exit holes formed in the housing at the same time, the fluorescent cover body is characterized in that the fluorescent material is uniformly mixed.

In addition, the fluorescent cover part is made of one fluorescent cover body to cover a plurality of exit ports formed in the housing at the same time, the fluorescent cover body portion of the fluorescent material corresponding to the exit port selected from the plurality of exit ports It is characterized in that it is mixed only to form.

In addition, the fluorescent cover part is composed of a plurality of fluorescent cover body to selectively cover each of the plurality of exit openings formed in the housing, characterized in that each of the fluorescent cover body is formed by mixing a fluorescent material uniformly. .

In this case, it is preferable that at least one detachment means is provided at a contact portion of the fluorescent cover body and the housing.

According to the present invention, by attaching detachably a fluorescent cover in which a fluorescent material necessary to implement white light is attached to an exit port from which light generated from a light emitting chip is emitted, uniform white light can be realized without using an expensive phosphor sheet. It is possible to provide a highly reliable light emitting device package.

In addition, by using a light emitting chip that emits red, green, or blue light, and selectively attaching a fluorescent cover to a plurality of exit ports from which the light emitted from each light emitting chip is emitted, selectively white light is realized, including white light. It is easy to realize various colors such as red, green, and blue.

Hereinafter, various embodiments of the light emitting device according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view showing a light emitting device according to a first embodiment of the present invention, Figure 2 is an exploded cross-sectional view showing a light emitting device according to a first embodiment of the present invention.

The first embodiment is a top-view type light emitting device that is used in various electronic devices, the light emitting device according to the first embodiment of the present invention is provided on the substrate 10, the substrate 10 The first and second leads 30a and 30b, the light emitting chip 40 mounted on the first lead 30a, and the wire 50 connecting the light emitting chip 40 and the second lead 30b. ), A reflector 20 provided on the substrate 10 to surround the light emitting chip 40, and a fluorescent cover 60 detachably provided on the reflector 20.

The substrate 10 is for mounting the light emitting chip 40 and is usually made of an insulator.

The first and second leads 30a and 30b are for applying an external power source to the light emitting chip 5 and are spaced apart from each other. In this case, the first and second leads 30a and 30b may use a conductor such as copper (Cu) or aluminum (Al).

The light emitting chip 40 is a means for generating light by application of an external power source, and may be selectively adopted among chips that emit light in the infrared region from the infrared region. For example, a light emitting diode can be used.

The wire 50 is for electrically connecting the light emitting chip 40 and the second lead 30b. The wire 50 is formed of gold (Au) or aluminum (Al) through a process such as a wire bonding process. do.

The reflector 20 has a cavity for receiving the first and second leads 30a and 30b and the light emitting chip 40 mounted thereon. The reflector 20 may be manufactured integrally with the substrate 10 or separately manufactured, and then adhered to the substrate 10. The inner surface forming the cavity of the reflector 20 forms a predetermined inclined surface, whereby the light generated from the light emitting chip 40 is upwardly reflected. Reflective materials or reflectors can be added to the inner surface for effective reflection of light. In addition, as the cavity formed in the reflector 20 is opened in one direction, an emission port 23 through which light generated from the light emitting chip 40 is emitted is formed.

The fluorescent cover 60 is manufactured by incorporating a fluorescent material into a transparent resin and then molding. In this case, it is preferable to add a detachment means to the reflector 20 to facilitate detachment.

The fluorescent cover 60 may be manufactured in a plate shape so as to cover the exit port 23 of the reflector 20. Of course, the present invention is not limited thereto, and may be manufactured in any shape as long as it can cover the exit port 23. In this case, the fluorescent cover 60 is provided with at least one detachment means, for example, a detachment protrusion 61 protruding from the fluorescent cover 60 at a portion in contact with the reflector 20.

In the reflector 20, a detachable groove 21 is formed as a detachable means to be inserted into the detachable protrusion 61 so that the fluorescent cover 60 is fixed to the reflector 20. The removal groove 21 is preferably formed in the shape and number corresponding to the removal projection (61). Of course, the desorption means is not limited to the embodiments shown, the desorption protrusions are formed in the reflector 20, the desorption groove may be formed in the fluorescent cover (60).

3 is an exploded cross-sectional view showing a light emitting device according to a modified example of the first embodiment of the present invention, and as shown in the drawing, stepped portions 71 and 81 corresponding to each other on the reflector 70 and the fluorescent cover 80 as detachable means. As the stepped portions 71 and 81 are fitted to each other, the fluorescent cover 80 may be fixed to the reflector 70. Of course, in addition to the presented embodiment, the fluorescent cover 80 may be detachable to the reflector 70 in various ways.

Although not shown in FIGS. 1 to 3, a molding part (not shown) for encapsulating the light emitting chip 40 and the wire 50 may be further formed.

4 is a schematic exploded perspective view of a display device using a light emitting device according to a second embodiment of the present invention, Figure 5 is a cross-sectional view showing a light emitting device according to a second embodiment of the present invention.

The second embodiment is a light emitting device used for a display device of various industrial equipment including a display unit and a measuring instrument of a home appliance such as a refrigerator, a washing machine, an air conditioner, a VCR, a DVD, a microwave oven, etc. The light emitting device is described as an example.

As shown in the figure, a substrate 100 on which the light emitting chip 110 is mounted; A housing (200) on which the substrate (100) is mounted and having an exit port (230); And a fluorescent cover portion detachably attached to a region including at least the exit port 230 region.

The substrate 100 may be, for example, a printed circuit board, an electrode (not shown) on which the light emitting chip 110 is mounted is formed, and a driving circuit (not shown) for driving the light emitting chip 110 is mounted. .

The light emitting chip 110 is mounted on an electrode (not shown) formed on the substrate 100. At this time, the size of the light emitting chip 110 and the color of the light can be variously adjusted. For example, if only white light is to be realized, a light emitting diode emitting blue light may be used as the light emitting chip 110. Thus, the white light is realized while the blue light emitted from the light emitting chip 110 is excited by the fluorescent cover part described later.

The housing 200 is a frame having a predetermined shape as shown in FIGS. 4 to 7, and is typically manufactured by an injection process. For example, the housing 200 includes a base surface 210 and a standing surface 220 which is placed at an edge of the base surface 210. A plurality of exit holes 230 and reflection holes 240 are formed on the base surface 210.

The exit port 230 is a through hole for outputting the light generated from the light emitting chip 110 to the outside of the housing 200, the shape, size, arrangement and number of the order is changed in various ways. In the drawing, a plurality of exit holes 230 having a substantially rectangular shape are regularly arranged, and a display film 400 in which letters, numbers, symbols, and patterns are printed is arranged on the upper part thereof according to the request of the purchaser. Instead, the display film 400 may be omitted, and the shape and arrangement of the exit port 230 may be formed so that letters, numeral symbols, and patterns may be expressed according to the request of the orderer.

In addition, the reflection hole 240 is formed in a wall shape surrounding the exit port 230 so that one side communicates with the exit port 230, and an entrance hole 241 into which the light emitting chip 110 is introduced is formed at the other side. do. In this case, the reflection hole 240 is preferably formed to have a constant inclination so that its inner diameter gradually increases from the inlet 241 toward the outlet 230 in order to efficiently emit light emitted from the light emitting chip 110. . Thus, the light emitted from the light emitting chip 110 is reflected from the inner circumferential surface of the reflection hole 240 and is emitted toward the exit port 230.

The fluorescent cover unit is formed by mixing a fluorescent material, and is provided to cover at least one or more exit holes 230. The fluorescent cover unit is a means for exciting secondary light emitted from the light emitting chip 110 to implement secondary light. In the second embodiment, as shown in FIGS. 4 and 5, one fluorescent cover body 300 is formed to simultaneously cover a plurality of exit holes 230 formed in the housing 200. The fluorescent material is uniformly mixed in the body of the fluorescent cover body 300. Accordingly, the primary light emitted from the plurality of light emitting chips 110 may be excited in the fluorescent cover body 300 to implement the secondary light having the same color. For example, when a light emitting diode emitting blue light is used as the light emitting chip 110 to implement white light, the fluorescent cover body 300 is manufactured by incorporating a fluorescent material having yellow light emitting characteristics. The fluorescent cover body 300 may be manufactured through a molding process such as injection, after mixing a fluorescent material having a yellow light emitting property to a transparent resin as in the first embodiment described above. At this time, it is preferable to add a detachment means to the detachable to the housing 200.

Like the first embodiment described above, the detachable means is formed on the base surface 210 of the housing 200 such that the protrusions 310 formed on one surface of the fluorescent cover body 300 and the protrusions 310 are retracted. The protrusion groove 250 is implemented. Of course, the present invention is not limited thereto, and the fluorescent cover body 300 may be detachably attached to the housing 200, including the modification of the first embodiment.

In addition, the fluorescent cover unit is not limited to the embodiment in which the fluorescent material is uniformly distributed in one fluorescent cover body 300, it may be variously changed.

6 and 7 are cross-sectional views illustrating a light emitting device according to a modified example of the second embodiment of the present invention. As shown in FIG. 6, the fluorescent cover part of the light emitting device according to the first modified example of the second embodiment is shown in FIG. 6. It consists of one fluorescent cover body 500 to cover a plurality of exit port 230 formed in the same time. However, the fluorescent cover body 500 emits light through the corresponding exit port 230 as the fluorescent material 510 is mixed only with a portion corresponding to the exit port 230 selected from the plurality of exit holes 230. Since only the primary light is excited by the fluorescent material 510 to implement the secondary light, the primary light emitted from the light emitting chip 110 and the secondary light generated by being excited by the fluorescent material 510 may be selectively implemented. Can be.

In addition, as shown in FIG. 7, in the light emitting device according to the second modification of the second embodiment, the fluorescent cover part 600 has a plurality of outlets 230 corresponding to the sizes of the plurality of exit holes 230 formed in the housing 200. Fluorescent cover bodies 600a and 600b are provided, and the fluorescent cover bodies 600a and 600b are attached only to the exit holes 230 selected from the exit holes 230. Accordingly, primary light emitted from the light emitting chip 110 and secondary light generated by being excited by each of the fluorescent cover bodies 600a and 600b may be selectively implemented. In this case, it is preferable that fluorescent materials are uniformly mixed in the respective fluorescent cover bodies 600a and 600b. In addition, the plurality of light emitting chips 110 may be formed of one type of light emitting chip that emits a specific color, but may use various types of light emitting chips that emit various colors, and different types of fluorescent materials may be mixed. By selectively placing and attaching the fluorescent cover bodies 600a and 600b, various colors may be realized.

In addition, a molding part (not shown) may be further formed on the housing 200 to protect the substrate 100. The molding part is formed using a molding resin, and the substrate 100 is encapsulated and fixed to the housing 200.

1 is a cross-sectional view showing a light emitting device according to a first embodiment of the present invention;

2 is an exploded cross-sectional view showing a light emitting device according to a first embodiment of the present invention;

3 is an exploded cross-sectional view showing a light emitting device according to a modification of the first embodiment of the present invention;

4 is a schematic exploded perspective view of a display device using a light emitting device according to a second embodiment of the present invention;

5 is a cross-sectional view illustrating a light emitting device according to a second embodiment of the present invention;

6 and 7 are cross-sectional views showing light emitting devices according to embodiments of the second embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: substrate 20: reflector

21: removable groove 60: fluorescent cover

61: detachable protrusion

100: substrate 200: housing

300,500,600a, 600b: fluorescent cover body

Claims (9)

A light emitting chip; A reflector surrounding the light emitting chip and having an exit port through which light is emitted; And a fluorescent cover which is formed by mixing a fluorescent material and is detachably provided to the reflector so as to cover the exit port. The method according to claim 1, Light emitting device, characterized in that at least one detachment means is provided at the contact portion of the fluorescent cover and the reflector. The method of claim 2, wherein the removable means A desorption protrusion protruding from the fluorescent cover; And a detachable groove formed in a reflector at a point corresponding to the projecting portion to receive the detachable protrusion. The method according to any one of claims 1 to 3, The fluorescent cover is a light emitting device, characterized in that formed by mixing a fluorescent material in a transparent resin. A substrate on which at least one light emitting chip is mounted; A housing on which the substrate is mounted and at least one exit hole for emitting light emitted from each of the light emitting chips is formed; And a fluorescent cover part formed by mixing fluorescent materials and being detachably provided in the housing to cover at least one or more exit holes. The method according to claim 5, The fluorescent cover part comprises a single fluorescent cover body to cover a plurality of exit ports formed in the housing at the same time, the fluorescent cover body is characterized in that the fluorescent material is uniformly mixed is formed. The method according to claim 5, The fluorescent cover part includes a single fluorescent cover body to simultaneously cover a plurality of exit holes formed in the housing, and the fluorescent cover body includes only a portion of the fluorescent material corresponding to the exit hole selected from the plurality of exit holes. Light-emitting device, characterized in that formed by mixing. The method according to claim 5, The fluorescent cover part is composed of a plurality of fluorescent cover body to selectively cover each of the plurality of exit holes formed in the housing, each of the fluorescent cover body is characterized in that the fluorescent material is uniformly mixed is formed . The method according to any one of claims 6 to 8, Light emitting device, characterized in that at least one detachment means is provided at the contact portion of the fluorescent cover body and the housing.
KR1020080095456A 2008-09-29 2008-09-29 Light emitting device KR101544444B1 (en)

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KR1020080095456A KR101544444B1 (en) 2008-09-29 2008-09-29 Light emitting device

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KR20100036029A true KR20100036029A (en) 2010-04-07
KR101544444B1 KR101544444B1 (en) 2015-08-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120032780A (en) * 2010-09-29 2012-04-06 서울반도체 주식회사 Phosphor sheet, light-emitting device having the phosphor sheet and method of manufacturing the same
CN104329896A (en) * 2014-07-31 2015-02-04 青岛海尔股份有限公司 Temperature controlled illumination assembly for refrigerator and refrigerator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003110146A (en) 2001-07-26 2003-04-11 Matsushita Electric Works Ltd Light-emitting device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120032780A (en) * 2010-09-29 2012-04-06 서울반도체 주식회사 Phosphor sheet, light-emitting device having the phosphor sheet and method of manufacturing the same
US9705050B2 (en) 2010-09-29 2017-07-11 Seoul Semiconductor Co., Ltd. Phosphor sheet, light-emitting device having the phosphor sheet and method of manufacturing the same
CN104329896A (en) * 2014-07-31 2015-02-04 青岛海尔股份有限公司 Temperature controlled illumination assembly for refrigerator and refrigerator
CN104329896B (en) * 2014-07-31 2017-04-05 青岛海尔股份有限公司 For the temperature control light fixture and refrigerator of refrigerator

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