TWI414204B - Light source device, light-emitting component package and power supplier - Google Patents

Abstract

A light source device includes a light-emitting component package and a power supplier. In the light-emitting component package, electrodes of a light emitting component are coupled to a secondary coil, and the secondary coil wraps a secondary magnetic inductive unit. The secondary magnetic inductive unit is coupled to a primary magnetic inductive unit of the power supplier to form a closed magnetic field loop. An electromotive force for lighting the light-emitting component is induced in the secondary coil by sensing the variation of a induced magnetic field induced by the current passed through the primary magnetic inductive unit.

Description

Light source device, light emitting device package structure and power supply unit

The present invention relates to a light source device, a light emitting device package structure, and a power supply unit.

FIG. 1 is a schematic diagram of a conventional inductive light-emitting diode package structure according to the prior art, and is disclosed in Japanese Laid-Open Patent Publication No. 2005-71867. The inductive LED package structure 100 is composed of a light-emitting diode 4, a secondary coil 5, and a primary coil 6. The two electrodes of the light-emitting diode 4 are electrically coupled to the secondary coil 5, and the secondary coil 5 is induced to generate a secondary current by the magnetic field source of the primary coil 6, and the secondary current is supplied to the light-emitting diode 4 for illumination.

The primary coil 6 is disposed outside the body 31, and a cavity 30 is provided in the center of the body 31. The lamp 2 is formed by the LEDs 4 disposed on the substrate 8 with two conductive pins 21; when the lamp 2 is inserted into the jack 30 The light-emitting diode 4 can receive the secondary current of the induction and emit light; the flower-shaped appearance 20 is used as a decoration.

The disadvantage of this prior art is that the magnetic field generated by the primary coil 6 and the secondary coil 5 is an open magnetic field, and the magnetic lines of force are distributed to the outside of the product, and the magnetic line power is increased according to the increase of the power supply amount, as shown by the dotted line in FIG. Show. Since the luminaire penetrates into the human life, these magnetic fields scattered outside the luminaire are used with the illumination of the luminaire, which affects the user for a long time. The cumulative effect of the electromagnetic field may cause harm to the health of the user. Another possible hazard is that it affects the operation of some electronic components. For example, when someone carries an electronic device with a heart rate adjuster in the body, these people may be exposed to an open magnetic field when approaching this conventional lamp. Interference, which causes the heart rhythm adjuster to malfunction or stop working, may cause life-threatening.

The invention provides a light source device, which can avoid the open electromagnetic field from endangering human health.

The invention further provides a light-emitting component package structure, which can avoid the open electromagnetic field harming human health.

The invention further provides a power supply unit, which is suitable for supplying power to the light-emitting component package structure, and can avoid the open electromagnetic field from endangering human health.

A light source device according to an embodiment of the invention includes a power supply unit and a light emitting element package structure. The power supply unit includes a primary coil and a primary magnetic guiding unit. An alternating electromagnetic field is generated after the primary coil is powered. The primary magnetic conducting unit has two end points and is surrounded by a primary coil for directing an alternating electromagnetic field. The light emitting device package structure includes a light emitting element, a secondary coil, and a secondary magnetic conductive unit. The light emitting element has at least two electrodes. The secondary coil has two end points that are electrically coupled to the electrodes. The secondary magnetic conducting unit has two end points that are magnetically coupled to the two end points of the primary magnetic conducting unit to form a closed magnetic circuit. The secondary magnetic conducting unit is configured to sense an alternating electromagnetic field guided by the primary magnetic conducting unit, and the secondary magnetic conducting unit is surrounded by the secondary coil. The alternating electromagnetic field causes the secondary coil to induce an induced electromotive force.

The light emitting device package structure according to still another embodiment of the present invention is adapted to be powered by a power supply unit. The power supply unit includes a primary coil and a primary magnetic guiding unit. An alternating electromagnetic field is generated after the primary coil is powered. The primary magnetic conducting unit has two end points and is surrounded by the primary coil for guiding the alternating electromagnetic field. The light emitting device package structure includes a light emitting element, a secondary coil, and a secondary magnetic conductive unit. The light emitting element has at least two electrodes. The secondary coil has two ends and is electrically coupled to the electrodes. The secondary magnetic conducting unit has two end points and is magnetically coupled to the two end points of the primary magnetic conducting unit to form a closed magnetic circuit. The secondary magnetic conducting unit is configured to sense an alternating electromagnetic field guided by the primary magnetic conducting unit, and the secondary magnetic conducting unit is surrounded by the secondary coil. The alternating electromagnetic field causes the secondary coil to induce an induced electromotive force.

The power supply unit of one embodiment of the present invention is adapted to supply power to a light emitting element package structure. The light emitting device package structure includes a light emitting element, a secondary coil, and a secondary magnetic conductive unit. The light emitting element has at least two electrodes. The secondary coil has two ends and is electrically coupled to the electrodes. The secondary magnetic conducting unit has two end points and is surrounded by the secondary coil. The power supply unit includes a primary coil and a primary magnetic guiding unit. An alternating electromagnetic field is generated after the primary coil is powered. The primary magnetic conducting unit has two end points and is surrounded by the primary coil for guiding the alternating electromagnetic field. The two ends of the secondary magnetic conducting unit are magnetically coupled to the two ends of the primary magnetic conducting unit to form a closed magnetic circuit. The secondary magnetic conducting unit is configured to sense an alternating electromagnetic field guided by the primary magnetic conducting unit, and the alternating electromagnetic field causes the secondary coil to induce an induced electromotive force.

In an embodiment of the invention, the power supply unit further includes a concave cup base, and the light emitting element is inserted into a concave cup positioned in the base of the concave cup.

In an embodiment of the invention, the light emitting device package structure further includes: a heat conducting member having at least two heat conducting portions and a carrying portion, wherein the carrying portion is connected to the heat conducting portion and carries the light emitting element.

In an embodiment of the invention, the power supply unit further includes a concave cup base, and the light emitting element is locked in a concave cup of the concave cup base via the heat conducting portion.

In an embodiment of the invention, the heat conducting portion contacts a heat dissipating portion of the concave cup base such that heat of the light emitting element is conducted to the heat dissipating portion via the heat conducting member to dissipate heat.

In an embodiment of the invention, the secondary magnetic conducting unit and the primary magnetic conducting unit are U-shaped.

In an embodiment of the invention, the secondary magnetic conducting unit has an E-shaped portion and has an intermediate extending portion, the secondary coil surrounds the intermediate extending portion of the secondary magnetic conductive unit; and the primary magnetic conducting unit has an E-shape and has An intermediate extension, the end of the intermediate extension of the primary magnetically conductive unit is coupled to the end of the intermediate extension of the secondary magnetically conductive unit, and the primary coil surrounds the intermediate extension of the primary magnetically conductive unit.

In an embodiment of the invention, the light emitting device package structure further includes: a capacitor connected to the electrode of the light emitting element.

In an embodiment of the invention, the light emitting device package structure further includes: a surge absorber connected in parallel to the electrodes of the light emitting element.

In an embodiment of the invention, the light emitting device package structure further includes: a rectifier connected in series between the electrode of the light emitting element and the secondary coil.

In an embodiment of the invention, the rectifier is a bridge rectifier circuit or a diode rectifier circuit.

In an embodiment of the invention, the light emitting element is a light emitting diode.

In summary, the light source device, the light emitting device package structure and the power supply unit of the present invention are inductively powered, so that there is no problem of poor contact or leakage of the contacts, and the generated electromagnetic field is closed without jeopardizing human health.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

2 is a schematic view of a light source device according to an embodiment of the present invention. The light source device 200 includes a power supply unit 200a and a light emitting element package structure 200b. The light emitting element package structure 200b includes a light emitting element 51. The light-emitting element 51 is, for example, a light-emitting diode, but is not limited thereto. The power supply unit 200a is electrically coupled to the external power source 50 and mates with the light emitting element package structure 200b to provide power for the light emitting element 51 to emit light.

The power supply unit 200a includes a primary coil 531 and a primary magnetic guiding unit 541. The primary coil 531 is a power supply coil having two terminals 561, 562 electrically coupled to the external power source 50. The primary magnetic guiding unit 541 has two end points 5411, 5412, and is surrounded by the primary coil 531 for guiding the alternating electromagnetic field generated after the primary coil 531 is powered.

The light emitting element package structure 200b further includes a secondary magnetic conductive unit 542 and a secondary coil 532. The secondary magnetic conducting unit 542 has two end points 5421, 5422 which are magnetically coupled to the two end points 5411, 5412 of the primary magnetic conducting unit 541 to form a closed magnetic circuit. The secondary magnetic conducting unit 542 is surrounded by the secondary coil 532. When the secondary magnetic conducting unit 542 senses the alternating electromagnetic field generated by the primary magnetic conducting unit 541, the secondary coil 532 induces an alternating magnetic field on the secondary magnetic conducting unit 542 to generate a secondary current.

The secondary coil 532 has two end points, and the light-emitting element 51 has two corresponding electrodes. The two ends of the secondary coil 532 are electrically coupled to the two electrodes of the light-emitting element 51 by wires 521, 522, respectively. When the secondary coil 532 generates a secondary current, the light-emitting element 51 is powered and lit.

In this embodiment, although the light-emitting element 51 having two electrodes is used as an example, in actual implementation, a light-emitting element of a flip chip technique may be used, or an upper electrode and a lower electrode may be used. Light-emitting elements.

Further, the ratio of the number of turns N1 of the primary coil 531 to the number of turns N2 of the secondary coil 532 is usually a fixed ratio. However, in general, a light-emitting element wafer may have a difference in forward voltage between different batches of products. Therefore, in the case where the number of turns N1 of the primary coil 531 is fixed, the forward voltage of the wafer of the light-emitting element 51 can be matched, and the output voltage of the secondary coil 532 can be adjusted by changing the number of turns N2 of the secondary coil 532. Solve the problem of the difference in forward bias.

In this embodiment, the power supply unit 200a may further include a concave cup base 551. The concave cup base 551 can seal the primary coil 531 and the primary magnetic guiding unit 541 to a specific position. The light emitting element package structure 200b may further include an electrically insulating base 552. The electrically insulating base 552 can encapsulate the secondary coil 532 and the secondary magnetically conductive unit 542 in a specific position.

The upper end of the concave cup base 551 has, for example, a concave cup 58 for arranging the light emitting element package structure 200b in the concave cup 58. When the light-emitting element 51 is inserted into the concave cup 58 of the concave cup base 551 with the electrically insulating base 552, the two end points 5411 and 5412 of the primary magnetic conductive unit 541 and the secondary magnetic conductive unit 542 are respectively ended. The dots 5421 and 5422 are opposite to each other and constitute a closed magnetic circuit, so that the alternating electromagnetic field is bound to operate between the primary magnetic conducting unit 541 and the secondary magnetic guiding unit 542.

In the present embodiment, an encapsulant 511 may be added around and above the light-emitting element 51. The encapsulant 511 can encapsulate the protective wires 521, 522 and the light-emitting element 51 for improved product reliability.

Figure 3 is an exploded cross-sectional view taken along line A-A of Figure 2; The light emitting element package structure 200b is prepared to be inserted into the concave cup 58 of the concave cup base 551 of the power supply unit 200a. After the insertion, the two end points 5421, 5422 (see FIG. 2) of the secondary magnetic conducting unit 542 in the light emitting element package structure 200b are respectively close to or in contact with the two primary magnetic conducting units 541 in the power supply unit 200a. Endpoints 5411, 5412 (see Figure 2). Thereby, the primary magnetic field generated by the primary magnetic conducting unit 541 and the secondary magnetic field generated by the secondary magnetic conducting unit 542 can be restrained to form a closed magnetic circuit.

4 is a schematic diagram of a light source device according to another embodiment of the present invention. Referring to FIG. 2 and FIG. 4, the present embodiment is similar to the previous embodiment, and the difference is that the light source device 300 of the embodiment further includes a heat conductive member. 57, used to carry the light-emitting element 51 and conduct heat.

Figure 5 is an exploded cross-sectional view taken along line A-A of Figure 4; Referring to FIG. 5, the heat conductive member 57 has a heat conductive portion 57a that extends to the outside of the light emitting element 51 to conduct heat generated by the light emitting element 51 to the outside. In the present embodiment, the concave cup base 551 of the light source device 200 includes, in addition to the central electrically insulating substrate, a heat dissipating portion 59 that is coated on the outside of the electrically insulating substrate, and together form a concave cup 58. . When the light-emitting element 51 is inserted into the concave cup 58 of the power supply unit 300a with the electrically insulating base 552, the heat-conducting portion 57a of the heat-conducting member 57 can be used as a component to fix the light-emitting element 51 via the heat-transfer portion 57a. It is fixed in the concave cup 58 of the concave cup base 551.

After the light-emitting element 51 is positioned in the concave cup 58 with the electrically insulating base 552, the heat-conducting member 57 is in contact with the heat-dissipating portion 59 of the power supply unit 300a to conduct the heat generated by the light-emitting element 51 through the heat-conducting member 57. Up to the heat dissipating portion 59, the heat dissipating area can be increased, so that the heat dissipation effect of the entire product is enhanced. In addition, in another embodiment, the heat dissipating fins (not shown) may be added to the outside of the heat dissipating portion 59 to further improve the heat dissipating effect.

In the present embodiment, the secondary magnetic conductive unit 542 shown in FIG. 4 may have an arc-shaped opening downward, and the primary magnetic conductive unit 541 may have an arc-shaped opening upward. The primary magnetic conducting unit 541 is coupled to the secondary magnetic conducting unit 542 to form a closed loop. In actual implementation, the primary magnetic guiding unit 541 can be designed to have a U-shaped opening downward, and the secondary magnetic conductive unit 542 can be designed to be a U-shaped opening upward, and after combining, form a circular arc or a rectangular closed ring, but not Limited.

FIG. 6 is a schematic diagram of a light source device according to another embodiment of the present invention. The light emitting element package structure 400b of the light source device 400 of FIG. 6 includes a light emitting element 51, a secondary coil 632, and a secondary magnetic conductive unit 642. The light emitting element 51 has two electrodes. The secondary coil 632 has two end points that are electrically coupled to the two electrodes of the light-emitting element 51 by wires 521, 522, respectively. The secondary magnetic permeability unit 642 is electrically coupled to the secondary coil 632. The second magnetic conductive unit 642 may have an E shape and have two end points 6421, 6422 and an intermediate extension 6423. The secondary coil 632 surrounds the intermediate extension 6423. The electrically insulating base 652 can encapsulate the secondary coil 632 and the secondary magnetically conductive unit 642 in a specific position.

The power supply unit 400a of the light source device 400 includes a primary coil 4631 and a primary magnetic guiding unit 641. The primary coil 631 is energized to generate an alternating electromagnetic field. The primary magnetic guiding unit 641 is electrically coupled to the primary coil 631 for guiding the alternating electromagnetic field. The primary magnetic guiding unit 641 may have an E-shape with two end points 6411, 6412 and an intermediate extending portion 6413. The primary coil 631 surrounds the intermediate extension 6413. The two end points 6411, 6412 and the intermediate extending portion 6413 of the primary magnetic conducting unit 641 are magnetically coupled to the two end points 6421, 6422 and the intermediate extending portion 6423 of the secondary magnetic conductive unit 642, respectively. The primary magnetic conducting unit 641 and the secondary magnetic conducting unit 642 are in opposite E-shapes to form a closed magnetic circuit. The secondary coil 632 senses an alternating magnetic field, generates an induced electromotive force and a secondary current, and provides illumination for the light-emitting element 51.

The power supply unit 400a of the present embodiment may further include a concave cup base 651. The concave cup base 651 can seal the primary coil 631 and the primary magnetic guiding unit 641 to a specific position. The primary coil 631 is a power supply coil having two terminals 661, 662 electrically coupled to the external power source 50. The upper end of the concave cup base 651 has a concave cup 58 for providing the light emitting element package structure 400b for placement. When the light emitting element package structure 400b is inserted and fixed in the concave cup 58, the two end points 6411, 6412 and the intermediate extending portion 6413 of the primary magnetic conductive unit 641 and the two end points 6421, 6422 and the middle of the secondary magnetic conductive unit 642 are respectively intermediate The extensions 6423 are close to each other or in contact. When the primary coil 631 is energized, the alternating electromagnetic field forms a closed magnetic circuit in the bound magnetic field lines of the primary magnetic conducting unit 641 and the secondary magnetic conducting unit 642.

FIG. 7 is a schematic diagram of a light source device according to another embodiment of the present invention. This embodiment is similar to the embodiment of FIG. 2, and the difference is that the light source device 500 of the present embodiment further includes a capacitor 60, and the power factor is improved by connecting the capacitor 60 in parallel with the two electrodes of the light-emitting element 51.

FIG. 8 is a schematic diagram of a light source device according to another embodiment of the present invention. This embodiment is similar to the embodiment of FIG. 2, and the difference is that the light source device 600 of the embodiment may further include a surge absorber 70. The surge absorber 70 can be connected in parallel to the two electrodes of the light-emitting element 51 for absorbing the surge voltage to improve product reliability.

FIG. 9 is a schematic diagram of a light source device according to another embodiment of the present invention. This embodiment is similar to the embodiment of FIG. 2, and the difference is that the light source device 700 of the embodiment may further include a rectifier 80. The rectifier 80 may be connected in series between the light emitting element 51 and the secondary coil 532. The two ends of the secondary coil 532 are electrically coupled to the first contact W and the second contact X of the rectifier 80, respectively. The two electrodes of the light-emitting element 51 are electrically coupled to the third junction Y and the fourth junction Z of the rectifier 80, respectively. The rectifier 80 converts the alternating current into direct current to provide illumination for the light-emitting element 51. The rectifier 80 can be a bridge rectifier or a diode rectifier.

The light source device of each of the above embodiments has at least the following advantages: 1. The primary magnetic conductive unit in the power supply unit and the secondary magnetic conductive unit in the light emitting device package structure form a closed magnetic circuit, so that the magnetic lines of force do not overflow to the outside. It is possible to prevent the user from being affected by the magnetic field.

2. The light emitting device package structure generates an induced electromotive force by inducing a change in an electromagnetic field generated by the power supply unit, so that the light emitting diode emits light. Therefore, no electrical contact is required between the light-emitting element package structure and the power supply unit, so that contact failure due to dust or vibration can be avoided, or leakage between the contacts can be caused at a high voltage.

3. The number of turns of the secondary coil can be adjusted in accordance with the forward bias grading of the light-emitting element wafer. Therefore, under the same power supply unit, different directional bias grading illuminating element wafers are applicable and quite flexible.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . Inductive LED package

2. . . Lamp

4. . . Light-emitting diode

5. . . Power receiving coil

6. . . Power supply coil

8. . . Substrate

20. . . Flower appearance

twenty one. . . Metal foot

31. . . Ontology

30. . . Jack

200, 300, 400, 500, 600, 700. . . Light source device

200a, 300a, 400a. . . Power supply unit

200b, 300b, 400b. . . Light-emitting element package structure

51. . . Light-emitting diode

57. . . Heat conductive member

58. . . Concave cup

59. . . Heat sink

60. . . Capacitor

70. . . Surge absorber

80. . . Rectifier

511. . . Encapsulant

521, 522. . . wire

531, 631. . . Primary coil

532, 632. . . Secondary coil

541, 641. . . Primary magnetic unit

542, 642. . . Secondary magnetic unit

551, 651. . . Concave base

552, 652. . . Electrically insulated base

561, 562. . . Primary coil end

5411, 5412, 5421, 5422. . . Magnetic unit end point

6411, 6412, 6413, 6421, 6422, 6423. . . Magnetic unit end point

W, X, Y, Z. . . Rectifier contact

FIG. 1 is a schematic diagram of a conventional inductive LED package structure of the prior art.

2 is a schematic view of a light source device according to an embodiment of the present invention.

Figure 3 is an exploded cross-sectional view taken along line A-A of Figure 2;

4 is a schematic view of a light source device according to another embodiment of the present invention.

Figure 5 is an exploded cross-sectional view taken along line A-A of Figure 4;

FIG. 6 is a schematic diagram of a light source device according to another embodiment of the present invention.

FIG. 7 is a schematic diagram of a light source device according to another embodiment of the present invention.

FIG. 8 is a schematic diagram of a light source device according to another embodiment of the present invention.

FIG. 9 is a schematic diagram of a light source device according to another embodiment of the present invention.

200. . . Light source device

200a. . . Power supply unit

200b. . . Light-emitting element package structure

51. . . Light-emitting diode

58. . . Concave cup

511. . . Encapsulant

521, 522. . . wire

531. . . Primary coil

532. . . Secondary coil

541. . . Primary magnetic unit

542. . . Secondary magnetic unit

551. . . Concave base

552. . . Electrically insulated base

561, 562. . . Primary coil end

5411, 5412, 5421, 5422. . . Magnetic unit end point

Claims (13)

A light emitting device package structure is adapted to be powered by a power supply unit, wherein the power supply unit comprises a primary coil and a primary magnetic guiding unit, and the primary coil generates a first alternating electromagnetic field after being powered, the primary magnetic guiding unit has two An end point and surrounded by the primary coil for guiding the first alternating electromagnetic field, the light emitting element package structure comprising: a light emitting element having at least two electrodes; and a secondary coil having two ends and electrically coupled to And a second magnetic conductive unit having two end points coupled to the two ends of the primary magnetic conductive unit to form a closed magnetic conductive structure, wherein the second magnetic conductive unit is configured to sense the first The electromagnetic field is exchanged to generate a second alternating electromagnetic field, and the secondary magnetic conducting unit is surrounded by the secondary coil, and the second alternating electromagnetic field causes the secondary coil to induce an induced electromotive force. The light emitting device package structure according to claim 1, wherein the power supply unit further comprises a concave cup base, and the light emitting element is inserted into a concave cup positioned in the concave cup base. The light emitting device package structure of claim 1, further comprising: a heat conducting member having at least two heat conducting portions and a carrying portion, wherein the carrying portion connects the heat conducting portions and carries the light emitting elements. The light emitting device package structure of claim 3, wherein the power supply unit further comprises a concave cup base, and the light emitting element is locked in a concave cup of the concave cup base via the heat conducting portions. The light emitting device package structure of claim 4, wherein the heat conducting portions contact a heat dissipating portion of the concave cup base, so that heat of the light emitting element is conducted to the heat dissipating portion via the heat conducting member to heat shed. The light emitting device package structure according to claim 1, wherein the secondary magnetic conductive unit and the primary magnetic conductive unit are U-shaped. The light emitting device package structure according to claim 1, wherein the secondary magnetic conductive unit has an E-shaped portion and has an intermediate extending portion, the secondary coil surrounding the intermediate extending portion of the secondary magnetic conductive unit; And the primary magnetic conducting unit has an E-shaped portion and has an intermediate extending portion, and an end point of the intermediate extending portion of the primary magnetic conducting unit is coupled to an end of the intermediate extending portion of the secondary magnetic conducting unit, The primary coil surrounds the intermediate extension of the primary magnetically permeable unit. The light emitting device package structure of claim 1, further comprising: a capacitor connected in parallel to the electrodes of the light emitting element. The light emitting device package structure according to claim 1, further comprising: a surge absorber connected to the electrodes of the light emitting element. The light emitting device package structure of claim 1, further comprising: a rectifier connected in series between the electrodes of the light emitting element and the secondary coil. The light emitting device package structure according to claim 10, wherein the rectifier is a bridge rectifier circuit or a diode rectifier circuit. The light emitting device package structure according to claim 1, wherein the light emitting element is a light emitting diode. A light source device comprising the light emitting device package structure according to any one of claims 1 to 12.