TWI584490B - Lighting device - Google Patents

Description

Lighting device

The present invention is a lighting device, and more particularly a lighting device using a flexible material.

With the rapid development of semiconductor components and illumination technology, illumination devices using conventional filament lamps have been replaced by devices using semiconductor light-emitting elements such as light-emitting diodes (LEDs).

However, due to the small size of the semiconductor light-emitting element, the irradiation range is limited. Therefore, when manufacturing the lighting device, it is necessary to use a plurality of semiconductor light emitting elements arranged and fixed on the circuit substrate in accordance with a desired light pattern. However, conventionally, illumination devices made of semiconductor light-emitting elements are generally hard circuit boards, so that it is not possible to make a device having a long length, otherwise it is easy to break; and because of lack of flexibility, it cannot satisfy the image. The need for Christmas lighting or fixtures and lighting has greatly limited the scope of the application. In addition, some conventional illumination devices made of semiconductor light-emitting elements use a flexible substrate, but since only a group of DC power sources are used to drive all the semiconductor light-emitting elements in the device, when the length of the illumination device increases, the distance Semiconductor light-emitting components with a far-reaching DC power supply will flow through the current of DC power. The voltage drop and loss caused by the long line appear to be low or even insufficient, so that the luminance distribution of the entire area of the entire illumination device is uneven, which seriously affects the illumination effect.

In view of this, how to improve the above-mentioned conventional illumination device made of a semiconductor light-emitting element has become a target of the related art.

The invention is to solve the problem that the illumination device made of the semiconductor light-emitting element is limited in application range because of the lack of flexibility; and when the length of the illumination device is increased, the power supply voltage drop and loss caused by the increased line are The problem is that the overall luminance distribution is uneven.

The present invention is a lighting device comprising: a substrate having a flexible material; first and second semiconductor components disposed on the substrate, the first and second semiconductor components respectively emitting a first light and a second light; The first and second power supply circuits are disposed on the substrate, and the first and second power supply circuits respectively provide first and second driving voltages for driving the first and second semiconductor elements, respectively.

Through the implementation of the present invention, the following advancements can be achieved: first, the lighting device can be flexibly arbitrarily adapted to the application requirements; and second, the lighting device can be prevented from being greatly reduced with the increase of the length of the power supply voltage. The local illuminating brightness is attenuated, thereby achieving the effect of expanding the application range and effectively stabilizing the illuminating brightness.

In order to make the technical content of the present invention known to those skilled in the art and to implement the same, and according to the content, the patent scope and the drawings disclosed in the specification, those skilled in the art can easily understand the related objects and advantages of the present invention. The detailed features and advantages of the present invention will be described in detail in the embodiments.

100‧‧‧Lighting device

10‧‧‧Substrate

11, 12‧‧‧ surface

13‧‧‧AC input

111, 112‧‧‧ Section

20, 30, 40‧‧‧ semiconductor components

50, 60‧‧‧ power supply circuit

51‧‧‧AC/DC converter circuit

52‧‧‧Rectifying components

53‧‧‧ Energy storage circuit

54‧‧‧Bias circuit

55‧‧‧Variable circuit

56‧‧‧Control circuit

70‧‧‧AC power supply

80‧‧‧Light pipe body

81‧‧‧Translucent colloid

BD‧‧•AC/DC converter

C1‧‧‧first capacitor

D1, D2‧‧‧ diode

Nd1~Nd4‧‧‧ nodes

R1~R6‧‧‧ resistor

S1~S3‧‧‧Light

Q0, Q1‧‧‧ transistor

U0~U2‧‧‧ current controller

A‧‧‧ input

K‧‧‧ output

CS‧‧‧current sensing end

ZD‧‧‧Zina diode

1A is a perspective view showing an illumination device according to an embodiment of the present invention; FIG. 1B is a top view of a lighting device according to an embodiment of the present invention; and FIG. 1C is a side view of a lighting device according to an embodiment of the present invention; FIG. 2B is a block diagram of another circuit structure of a lighting device according to an embodiment of the present invention; FIG. 3 is a block diagram of another lighting device according to an embodiment of the present invention; FIG. 4 is a circuit diagram of a lighting device according to an embodiment of the present invention; FIG. 5A is a lighting diagram of an embodiment of the present invention; The device further includes a partial side view of a light-transmissive tube; and FIG. 5B is a cross-sectional view of a lighting device further including a light-transmissive tube structure according to an embodiment of the invention.

As shown in FIG. 1A to FIG. 1C , the present embodiment is a lighting device 100 including: a substrate 10; a first semiconductor component 20 and a second semiconductor component 30; and a first power supply circuit 50 and A second power supply circuit 60.

The substrate 10 is made of a flexible material such as plastic or rubber. A single-body shaped single structure, rather than a multi-section combination of multiple sections of hard or flexible material.

The substrate 10 has a first surface 11 and a second surface 12. The surface 11 is the upper surface of the substrate 10, and conductive lines are distributed on the upper surface for power supply or electrical signals to pass. Surface 11 can in turn be divided into a first section 111 and a second section 112. The surface 12 is the lower surface of the substrate 10, and the surface thereof may be distributed with conductive lines as needed or without any wiring.

Referring to FIGS. 2A and 2B simultaneously, the semiconductor device 20 may be formed of one light-emitting diode or formed by a plurality of light-emitting diodes connected in parallel as shown in FIG. 2A, or as shown in FIG. 2B. The figure is formed by connecting a plurality of light emitting diodes in series.

As shown in FIGS. 1A, 2A, and 2B, the semiconductor element 20 is provided in the segment 111 on the surface 11 of the substrate 10. The semiconductor component 20 includes a first end and a second end. The first end of the semiconductor component 20 is an anode terminal for connecting a positive terminal of a driving power; the second terminal of the semiconductor component 20 is a cathode terminal thereof for connecting a negative terminal of a driving power.

The semiconductor element 30 can also be formed by one light-emitting diode, or by a plurality of light-emitting diodes connected in parallel, or by a plurality of light-emitting diodes connected in series. In addition, the semiconductor element 30 can also employ a light-emitting element that emits color light of a different color from the semiconductor element 20 in accordance with the needs of the application.

The semiconductor component 30 is disposed in the section 112 on the surface 11 of the substrate 10, and the semiconductor component 30 also includes a first end and a second end. The first end of the semiconductor component 30 is an anode terminal for connecting a positive terminal of a driving power; the second end of the semiconductor component 30 is a cathode terminal thereof for connecting a driving end. The negative terminal in electricity.

Referring again to FIG. 1C, the semiconductor component 20 and the semiconductor component 30 can respectively emit a light S1 and a light S2. Since the semiconductor element 20 and the semiconductor element 30 can respectively use light-emitting elements that emit different colors of light, the light S1 and the light S2 can be the same color or different colors of color light.

Referring to FIGS. 1A through 1C at the same time, the power supply circuit 50 is for supplying a first voltage to drive the semiconductor device 20 to operate. The power supply circuit 50 may be disposed in the section 111 of the surface 11 of the substrate 10 as shown in FIGS. 1A and 1B, or may be disposed on the surface 12 of the substrate 10 as shown in FIG. 1C.

In order to avoid unevenness in luminance distribution caused by shielding the traveling and reflection of the light S1 emitted from the semiconductor element 20, when the power supply circuit 50 is disposed in the section 111 of the surface 11, the setting position of the power supply circuit 50 is arranged. Outside of each of the light-emitting diode arrays constituting the semiconductor element 20, it is not provided between the respective light-emitting diodes in the light-emitting diode array, and thus the width of the substrate 10 is slightly increased.

However, when the power supply circuit 50 is provided on the surface 12 of the substrate 10 as shown in FIG. 1C, since it is not necessary to consider the influence on the uniformity of light emission, it can be disposed at a position opposed to the semiconductor element 20 via the substrate 10. Therefore, the width of the substrate 10 can be reduced, but the thickness of the entire illumination device 100 is slightly increased. Since the selection of these two different setting positions is possible, the application range of the lighting device 100 provided by the present embodiment is greatly increased.

The power supply circuit 60 is for providing a second voltage to drive the semiconductor device 30 to operate. Similar to the arrangement of the power supply circuit 50, the power supply circuit 60 can also be disposed in the section 112 of the surface 11 of the substrate 10 or the surface 12 To meet different application needs.

Referring to FIGS. 2A and 2B again, the power supply circuit 50 may include a first AC/DC conversion circuit 51. As described above, the difference between FIG. 2A and FIG. 2B is only that the semiconductor element 20 in FIG. 2A is formed by a plurality of light emitting diode elements connected in parallel, and the semiconductor element 20 in FIG. 2B is composed of plural numbers. A plurality of light emitting diode elements are connected in series.

Please refer to FIG. 1A, FIG. 1B, FIG. 2A and FIG. 2B at the same time. The AC/DC conversion circuit 51 has one end, a second end, a third end and a fourth end, and the substrate 10 is provided with an AC input. End 13.

The first end and the fourth end of the AC/DC conversion circuit 51 are respectively coupled to the two ends of an AC power source 70 via the AC input terminal 13, and the second end and the third end of the AC/DC conversion circuit 51 are respectively coupled. The first end and the second end of the semiconductor element 20 drive the semiconductor element 20 to supply a first driving voltage.

The power supply circuit 60 also has a first end, a second end, a third end, and a fourth end, and the first end and the fourth end of the power supply circuit 60 are respectively coupled to the AC in the power supply circuit 50. / DC conversion circuit 51 of the first end and the fourth end. That is, the input terminals of the AC/DC conversion circuit 51 in the power supply circuit 60 and the power supply circuit 50 are coupled to the two ends of the AC power source 70 via the AC input terminal 13 on the substrate 10 after being connected in parallel.

Such a configuration allows the user to set and use the lighting device 100 provided by the embodiment, regardless of the lighting component used in the lighting device 100 and the required operating voltage, as long as the external power supply is directly connected. The AC power source 70 can be directly connected to the AC input terminal 13. Even if the semiconductor element 20 and the semiconductor element 30 provided on the illumination device 100 emit different colors of light, different operations are required. The voltage light-emitting element does not need to be rectified and adjusted to a different voltage before being sent to the illumination device 100. This greatly increases the scope of the application and the convenience of use.

Furthermore, since the semiconductor element 20 and the semiconductor element 30 located in different sections on the substrate 10 each have a power supply circuit located in the same section thereof. Therefore, even if the length of the illumination device 100 provided by the present embodiment is increased due to application requirements, the distance between each power supply circuit and the semiconductor element it drives is not increased. This does not cause excessive voltage drop and loss of power supply power due to an increase in distance, and thus causes a decrease in luminance generated by a part of the light-emitting elements. Therefore, the illumination device 100 provided by the embodiment can also provide a uniform illumination effect.

Referring to FIG. 1B and FIG. 1C again, the illumination device 100 provided in this embodiment may further include a third semiconductor component 40. The semiconductor element 40 can also be composed of one or a plurality of light-emitting diodes. The semiconductor component 40 is disposed in the section 111 and is also driven by the first voltage supplied from the power supply circuit 50. Also, the semiconductor element 40 can emit a light S3. The semiconductor element 40 can be formed of the same or different light-emitting elements as the semiconductor element 20, so that the light S3 can be the same or different in color from the light S1, and the requirements of use can be seen from the end.

In order to uniformly distribute the brightness of the light emitted by the illumination device 100 provided in the embodiment, the semiconductor element 20, the semiconductor element 40, and the semiconductor element 30 are arranged along the long side of the substrate 10 in an equally spaced manner during alignment. of.

In addition, in order to prevent the semiconductor element 40 from being insufficient due to being too far from the power supply circuit 50, the power supply circuit 50 is disposed between the semiconductor element 20 and the semiconductor element 40 and relatively close to the semiconductor element 40. Set.

As shown in FIG. 3 and FIG. 4, the illumination device 100 provided in this embodiment further includes a rectifying component 52, a storage circuit 53, a biasing circuit 54, a voltage stabilizing circuit 55, and a control. Circuit 56. 3 is a block diagram of a circuit structure of a lighting device 100 according to an embodiment of the present invention; and FIG. 4 is a specific block designed according to the circuit block diagram shown in FIG. 3. Circuit diagram of lighting device 100.

The AC/DC conversion circuit 51 may be composed of an AC/DC converter BD simply in an actual circuit application, or may be composed of a plurality of discrete diodes. Figure 4 shows an AC/DC converter BD.

The rectifying element 52 has a first end and a second end. The first end of the rectifying element 52 and the second end of the AC/DC converting circuit 51 are coupled to the first node Nd1, and the second end of the rectifying element 52 is connected to the semiconductor element 20. The first end is coupled to a second node Nd2. That is, the rectifying element 52 is connected in series between the second end of the AC/DC converting circuit 51 and the first end of the semiconductor element 20.

The function of the rectifying element 52 is to protect the semiconductor element 20, ensuring that no reverse current flows through the semiconductor element 20 to cause damage to the semiconductor element 20. In general, the rectifying element 52 may simply be constituted by a diode D1.

The storage circuit 53 has a first end and a second end. The first end of the storage circuit 53 is coupled to the second end of the rectifying element 52 to the second node Nd2, and the second end of the storage circuit 53 is The second end of the semiconductor component 20 is coupled to the third node Nd3. That is, both ends of the tank circuit 53 are connected in parallel to the semiconductor element. On both ends of 20.

The tank circuit 53 can be formed simply by paralleling at least one resistor R3 with at least one capacitor C1. The capacitor C1 stores energy when the semiconductor element 20 is powered and in a light-emitting state; when the semiconductor element 20 is not powered and does not emit light, the capacitor C1 is discharged, and the flicker of the semiconductor element 20 is lowered. The resistor R3 converts the amount of power absorbed in the capacitor C1 into heat energy, so that the capacitor C1 maintains a space for absorbing and storing power.

The biasing circuit 54 has a first end, a second end, and a third end. The first end of the biasing circuit 54 is coupled to the first node Nd1 to obtain a positive voltage input therefrom. The function of bias circuit 54 is to provide the bias voltage required to operate each of the active components in control circuit 56. In general, it may be simply constituted by a resistor, and in the circuit employed in the embodiment, the bias circuit 54 is constituted by resistors R1, R2.

The voltage stabilizing circuit 55 has a first end and a second end. The first end of the voltage stabilizing circuit 55 is coupled to the third end of the bias circuit 54 to obtain a positive voltage from the third end of the bias circuit 54. In general, the voltage stabilizing circuit 55 can be simply constituted by a Zener diode ZD and utilizes the breakdown voltage of the Zener diode ZD to achieve voltage stabilization.

Control circuit 56 has a first end, a second end, a third end, and a fourth end. The first end and the second end of the control circuit 56 are respectively coupled to the first end of the voltage stabilizing circuit 55 and the second end of the bias circuit 54, and the third end of the control circuit 56 is the second end of the semiconductor component 20. The terminal is coupled to the third node Nd3, and the fourth end of the control circuit 56 is coupled to the second terminal of the voltage stabilization circuit 55 and the third terminal of the AC/DC conversion circuit 51 to the fourth node Nd4.

The function of the control circuit 56 is to control the luminance of the semiconductor element 20 by controlling the current flowing through the semiconductor element 20. The main components of the control circuit 56 used in this embodiment include transistors Q0 and Q1, current controllers U0, U1 and U2.

Each of the transistor Q0 and the transistor Q1 may be a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), such as iML3160.

The functions of the current controller U0, the current controller U1 and the current controller U2 are used for adjusting and stabilizing the current, and a controller such as the iML8684 for adjusting the current of the LED output current can be selected.

The source of the transistor Q0 is coupled to the input of the current controller U0 to control the current controller U0. The gate and the drain of the transistor Q0 are coupled to the third terminal of the bias circuit 54 and the second terminal of the bias circuit 54, respectively, to obtain a bias voltage required for operation.

The source of the transistor Q1 is coupled to the input of the current controller U1 and the input of the current controller U2 to control the current controller U1 and the current controller U2. The gate of transistor Q1 and the third terminal of bias circuit 54 are used to obtain the bias voltage required for operation.

The drain of the transistor Q1 is coupled to the second terminal of the semiconductor device 20 to adjust the current flowing through the semiconductor device 20, and to control the luminance of the semiconductor device 20 or by adjusting the magnitude of the current.

In addition, a resistor R4 and a diode D2 are coupled between the output end of the current controller U0 and the current sensing end of the current controller U0, and the resistor R4 and the diode D2 are connected in parallel with each other to allow current control. The current sensing terminal of U0 can be obtained The required current is sensed, and the current sensing terminal of the current controller U0 is protected from the reverse current by the diode D2.

The output of the current controller U1 is coupled to the current sensing terminal of the current controller U0, so that the current controller U0 can monitor the output current of the current controller U1. A resistor R5 is coupled between the output of the current controller U1 and the current sensing terminal of the current controller U1, so that the current sensing terminal of the current controller U1 can obtain the required sensing current.

The output of the current controller U2 is also coupled to the current sensing terminal of the current controller U0. This allows the output current of the current controller U2 to be monitored by the current controller U0 as well. A resistor R6 is coupled between the output of the current controller U2 and the current sensing terminal of the current controller U2, so that the current sensing terminal of the current controller U2 can obtain the required sensing current.

In addition, the illumination device 100 provided in this embodiment may include the rectifying component 52, the energy storage circuit 53, the bias circuit 54, the voltage regulator circuit 55, and the control circuit 56, and may also include the rectifying component 52, and The tank circuit 53 is omitted, and only the bias circuit 54, the voltage regulator circuit 55, and the control circuit 56 are included.

It should be noted that the rectifying element 52 is connected in series between the second end of the AC/DC converting circuit 51 and the first end of the semiconductor element 20. If the rectifying element 52 is directly removed, an open circuit is formed between the second end of the AC/DC converting circuit 51 and the first end of the semiconductor element 20. Therefore, the first node Nd1 and the second node Nd2 must be coupled to each other after the rectifying element 52 is removed, so that current can flow through the first node Nd1 and the second node Nd2 from the second end of the AC/DC conversion circuit 51. It then flows into the first end of the semiconductor component 20.

As for the energy storage circuit 53, since it is connected in parallel with the semiconductor element 20 Between the second node Nd2 and the third node Nd3, the omission can be directly removed without any influence on the operation of the semiconductor element 20.

As shown in FIG. 5A and FIG. 5B , the illumination device 100 of the present embodiment may further include a light transmissive tube body 80 for surrounding the cladding substrate 10 , the semiconductor component 20 , the semiconductor component 30 , and the semiconductor component 40 . The power supply circuit 50 and the power supply circuit 60 form a lamp type structure.

Since the illuminating device 100 provided in this embodiment has flexibility by using the substrate 10, the substrate 10 can be disposed in a manner that the substrate 10 is flat when the light-transmissive tube 80 is placed. After being twisted or flexed into many different shapes, it is then placed in the light-transmissive tube body 80, and finally, the light-transmitting colloid 81 is injected and fixed. Therefore, it is possible to produce a plurality of special light type lamps or strips which have not been made or are difficult to manufacture in the past, which greatly expands the application range of the illumination device 100.

It can be seen from the above description that the illumination device 100 provided by the embodiment of the present invention can be flexibly arbitrarily changed according to the application requirements, and the power supply voltage is not greatly reduced as the length is increased, so that the local illumination luminance is attenuated. In turn, the effect of expanding the application range and effectively stabilizing the illuminating brightness can be achieved.

The embodiments are described to illustrate the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the present invention and to implement the present invention without limiting the scope of the present invention. Equivalent modifications or modifications made by the spirit of the disclosure should still be included in the scope of the claims described below.

100‧‧‧Lighting device

10‧‧‧Substrate

11‧‧‧ surface

13‧‧‧AC input

111, 112‧‧‧ Section

20, 30‧‧‧ semiconductor components

50, 60‧‧‧ power supply circuit

Claims (9)

A lighting device comprising: a substrate having a flexible material; a first and a second semiconductor component disposed on the substrate, the first semiconductor component having a first end and a second end, the first And the second semiconductor component can respectively emit a first light and a second light; a first and a second power supply circuit are disposed on the substrate, and the first and second power supply circuits respectively provide a first and a second driving voltage for driving the first and second semiconductors respectively An element , wherein the first power supply circuit includes a first AC/DC conversion circuit, the first AC/DC conversion circuit has a first end, a second end, a third end, and a fourth end, and the first AC/ The first end and the fourth end of the DC conversion circuit are respectively coupled to the two ends of the AC power supply, and the second end and the third end of the first AC/DC conversion circuit are respectively coupled to the first end of the first semiconductor component and a second end; a bias circuit disposed on the substrate, having a first end, a second end, and a third end, the first end of the bias circuit being coupled to the second end of the AC/DC conversion circuit Connected to a first node, the first end of the first semiconductor component and the second end of the AC/DC conversion circuit are coupled to a second node, and the first node and the second node are coupled to each other; a voltage stabilizing circuit disposed on the substrate and having a first end and a second end A first terminal of the voltage regulator circuit is connected to a third terminal of the bias circuit; and a control circuit, disposed on the substrate, having a first end, a second end, the third end and a fourth end, the control The first end and the second end of the circuit are respectively coupled to the first end of the voltage stabilizing circuit and the second end of the bias circuit, and the third end of the control circuit is coupled to the second end of the first semiconductor component In a third node, the fourth end of the control circuit, the second end of the voltage stabilizing circuit, and the third end of the first AC/DC converting circuit are coupled to a fourth node. The illuminating device of claim 1, wherein the substrate has a first surface and a second surface, the first surface further having a first segment and a second segment, the first semiconductor component The first power supply circuit is located in the first section, and the second semiconductor component and the second power supply circuit are located in the second section. The illuminating device of claim 1, wherein the substrate has a first surface and a second surface, the first and second semiconductor components are located on the first surface, the first and second power supply circuits Located on the second surface. The lighting device of claim 1, wherein the second power supply circuit has a first end, a second end, a third end, and a fourth end, the first end and the fourth end of the second power supply circuit The terminals are respectively coupled to the first end and the fourth end of the first power supply circuit. The illuminating device of claim 1, further comprising a third semiconductor component disposed on the substrate, the third semiconductor component being A third light is emitted, and the third semiconductor component is driven by the first voltage. The illumination device of claim 5, wherein the first semiconductor element, the third semiconductor element and the second semiconductor element are arranged along a long side of the substrate in an equally spaced manner. The illuminating device of claim 6, wherein the first power supply circuit is disposed between the first semiconductor component and the third semiconductor component, and the first power supply circuit is closer to the third semiconductor component . The lighting device of claim 1, wherein the lighting device further comprises: a rectifying element having a first end and a second end, the first end of the rectifying element and the second end of the AC/DC converting circuit The second end of the rectifying component is coupled to the first end of the first semiconductor component to a second node; and the first energy storage circuit has a first end and a second end. The first end of the tank circuit and the second end of the rectifying element are coupled to the second node, and the second end of the tank circuit and the second end of the first semiconductor element are coupled to a third node. The illuminating device of claim 1, further comprising a light-transmissive tube surrounding the substrate, the first and second semiconductor elements, and the first and second power supply circuits.