TW201605287A - Connecting structure of an LED device - Google Patents

Abstract

A connecting structure of an LED device is provided. The LED device includes a device-input contact, a device-output contact, a first LED unit, a second LED unit and a control circuit. The control circuit includes a power contact, an input contact, and an output contact. The connecting structure includes a first configuration and a second configuration. The first configuration is that the negative electrode of the first LED unit is connected to the power contact of the control circuit, and the power contact of the control circuit is further connected to the positive electrode of the second LED unit. The second configuration is that the negative electrode of the second LED unit is connected to the input contact of the control circuit. In this way, the control circuit is powered and the current passing through the LED device can be controlled.

Description

Connection structure of light-emitting diode device

The present invention relates to a light emitting diode device, and more particularly to a connection structure of a light emitting diode device.

Common light-emitting diode devices often require dozens or even hundreds of light-emitting diodes. The connection configuration of the LED device directly affects the performance, reliability and service life of the LED.

Due to the characteristics of the light-emitting diode, the light-emitting diode device needs to be driven with a constant current, and the drive control circuit maintains a low self-power consumption to maintain the efficiency of the overall device.

Most of the common light-emitting diode devices are series-connected, and a plurality of light-emitting diodes are connected in series. In addition, in the light emitting diode device, a forward current flowing through the light emitting diode can be adjusted by providing a series current limiting resistor. The structure of the illuminating polar body device makes the circuit itself relatively simple and has the advantages of small size, low cost, and the like because no additional energy storage components are needed. However, in the connection structure of the series current limiting resistor, the current of the series LEDs varies with the input voltage fluctuation, so that the brightness and color of the LED are changed, and the characteristics cannot be maintained constant.

Therefore, how to connect the driving control circuit and the light-emitting diode to realize that the power supply circuit can be supplied to the driving control circuit without using an additional energy storage component. The effect of controlling the constant current of the plurality of light-emitting diodes is one of the problems to be solved by those skilled in the art.

In view of the above problems, the present invention provides a connection structure of a light-emitting diode device, which is different from the conventional series light-emitting diode device using a current limiting resistor, and can improve the flow-through diode in the current-limiting resistor circuit structure. The current varies with the input voltage fluctuation and cannot maintain the current constant. In addition, the constant current of the light-emitting diode can be controlled without an additional external power source.

The light emitting diode device has a device input end, a device output end, a first light emitting diode unit, and a second light emitting diode. Body unit and a control circuit. The input end of the device and the output end of a device are respectively used to connect a power source and a ground. The positive terminal of the first light emitting diode unit is connected to the input end. The control circuit has a power terminal, a control input, and a control output. The control output is connected to the output of the device.

The connection architecture has a first connection configuration and a second connection configuration. The first connection configuration is coupled to the power supply end of the control circuit by the negative terminal of the first LED unit, and the power terminal of the control circuit is further coupled to the anode of the second LED unit. The second connection configuration is coupled to the control input of the control circuit by the cathode of the second LED unit.

In an embodiment, the first light emitting diode unit is a single light emitting diode. In one embodiment, the single light emitting diode is a combination of a plurality of small light emitting diode units in series, parallel or series and parallel, such as a high voltage light emitting diode. In at least one embodiment in which the first light emitting diode unit is a single light emitting diode, the single light emitting The plurality of small light emitting diode units in the dipole may be selected as a combination of a plurality of dispersed small light emitting diode units or a plurality of small light emitting diode unit stacked wafer states.

In another embodiment, the first light emitting diode unit is a combination of a plurality of light emitting diodes.

In at least one embodiment in which the first light emitting diode unit is a combination of a plurality of light emitting diodes, the combination of the plurality of light emitting diodes may be selected as a combination of series, parallel, or series and parallel.

In an embodiment in which the first light emitting diode unit is a combination of a plurality of light emitting diodes, a combination of a plurality of dispersed light emitting diodes or a plurality of light emitting diode stacked wafer states may be selected.

In an embodiment, the second light emitting diode unit is a single light emitting diode. In one embodiment, the single light emitting diode is a combination of a plurality of small light emitting diode units in series, parallel or series and parallel, such as a high voltage light emitting diode. In at least one embodiment in which the second light emitting diode unit is a single light emitting diode, the plurality of small light emitting diode units in the single light emitting diode may be selected as a plurality of small light emitting diodes dispersed. A combination of body cells or a wafer aspect of a plurality of small light emitting diode cell stacks.

In another embodiment, the second light emitting diode unit is a combination of a plurality of light emitting diodes.

In at least one embodiment in which the second light emitting diode unit is a combination of a plurality of light emitting diodes, the combination of the plurality of light emitting diodes may be selected as a combination of series, parallel, or series and parallel.

The second light emitting diode unit is at least one of a combination of a plurality of light emitting diodes In an embodiment, the combination of the plurality of light emitting diodes may be selected as a combination of a plurality of dispersed light emitting diodes or a plurality of light emitting diode stacked wafers.

In an embodiment, the light emitting diode device further has a third light emitting diode unit. The connection architecture also includes a third connection configuration. The third connection configuration is connected to the anode of the third LED unit by the control output of the control circuit. The output terminal of the negative electrode connecting device of the third light emitting diode unit.

In an embodiment, the third LED unit is a single LED. In one embodiment, the single light emitting diode is a combination of a plurality of small light emitting diode units in series, parallel or series and parallel, such as a high voltage light emitting diode. In at least one embodiment in which the third light emitting diode unit is a single light emitting diode, the plurality of small light emitting diode units in the single light emitting diode may be selected as a plurality of small light emitting diodes dispersed. A combination of body cells or a wafer aspect of a plurality of small light emitting diode cell stacks.

In another embodiment, the third light emitting diode unit is a combination of a plurality of light emitting diodes.

In at least one embodiment in which the third light emitting diode unit is a combination of a plurality of light emitting diodes, the combination of the plurality of light emitting diodes may be selected as a combination of series, parallel, or series and parallel.

In at least one embodiment in which the third light emitting diode unit is a combination of a plurality of light emitting diodes, the combination of the plurality of light emitting diodes may be selected as a combination or a plurality of dispersed plurality of light emitting diodes. The wafer aspect of the LED stack.

In an embodiment, the control circuit is a current regulation circuit. For example, in an embodiment, the control circuit has a switch that can be pulse width regulated (Pulse width) Modulation-PWM) mode controls the switch. During each repeated switching cycle, the ratio of the on and off times is varied to regulate the average current (average power consumption) flowing through the light emitting diode.

In one embodiment, the power terminal of the control circuit has a first power terminal and a second power terminal. The first power terminal is used to connect the negative electrode of the first LED unit. The second power terminal is used to connect the anode of the second LED unit. The first power terminal is shorted to the second power terminal.

The connection structure having at least one first connection configuration and a second connection configuration of the present invention can be applied to the light emitting diode device. Therefore, it is possible to achieve a constant current control through the control circuit without additionally configuring the power supply.

100, 200, 300‧‧‧Lighting diode devices

10‧‧‧First LED unit

101‧‧‧ positive

102‧‧‧negative

12‧‧‧Second light-emitting diode unit

121‧‧‧ positive

122‧‧‧negative

14‧‧‧3rd LED unit

141‧‧‧ positive

144‧‧‧negative

20‧‧‧Control circuit

201‧‧‧Power terminal

2010‧‧‧First power terminal

2012‧‧‧second power terminal

203‧‧‧Control input

205‧‧‧Control output

30‧‧‧First connection configuration

32‧‧‧Second connection configuration

34‧‧‧ Third connection configuration

40‧‧‧ device input

42‧‧‧ device output

V+‧‧‧ power supply

V-‧‧‧ Grounding

FIG. 1 is a block diagram showing a connection structure of a first embodiment of the present invention applied to a light emitting diode device.

2 is a block diagram showing a connection structure of a second embodiment of the present invention applied to a light emitting diode device.

FIG. 3 is a block diagram showing a connection structure of a third embodiment of the present invention applied to a light emitting diode device.

In order to more clearly understand the concept of the present invention, several embodiments of the present invention are described in detail below with reference to the accompanying drawings. The same symbols represent components or devices that have the same or similar functions. The "coupling" and "connection" described in the present invention are only "indirect or direct electrical connection". In addition, the shapes, dimensions, proportions, and the like of the illustrated components are merely illustrative, and are intended to be used by those of ordinary skill in the art to understand the present invention and not to limit the scope of the present invention. system. In addition, any of the embodiments described in the following description, even if a plurality of technical features are simultaneously disclosed, does not mean that all the technical features in any of the embodiments must be simultaneously implemented by the inventors. In other words, as long as the implementation possibilities are not affected, those skilled in the art can selectively implement some, but not all, of the technical features according to the disclosure of the present invention and according to the needs or design concepts, thereby increasing the implementation of the present invention. Time elasticity.

Please refer to FIG. 1 first. FIG. 1 is a block diagram showing a connection structure applied to a light-emitting diode device according to a first embodiment of the present invention. The LED device 100 has, but is not limited to, a device input terminal 40, a device output terminal 42, a first LED unit 10, a second LED unit 12, and a control circuit 20.

The device input terminal 40 is used to connect a power source V+. The device output 42 is used to ground V-. The positive electrode 101 of the first light emitting diode unit 10 is connected to the device input terminal 40. The control circuit 20 has a power terminal 201, a control input 203 and a control output 205. Control output 205 is coupled to device output 42. In this embodiment, the control circuit 20 is a current regulating circuit and may have a switch, such as a gold-oxygen half field effect transistor, a BJT, or the like. In an embodiment, the control circuit 20 can control the switch by means of pulse width modulation (PWM) to achieve a constant current regulation.

The connection architecture has a first connection configuration 30 and a second connection configuration 32. The first connection configuration 30 is coupled to the power terminal 201 of the control circuit 20 by the anode 102 of the first LED unit 10 . The power terminal 201 of the control circuit 20 is further coupled to the anode 121 of the second LED unit 12.

The second connection configuration 32 is coupled to the control input 203 of the control circuit 20 by the negative electrode 122 of the second LED unit 12 .

More specifically, in the present embodiment, the first LED unit 10 is a single LED, and the anode 101 is connected to the input end 40 of the device, and the cathode 102 is coupled to the power terminal 201 of the control circuit 20. . The single-emitting diode is a combination of a plurality of small-emitting diode units in series, parallel or series-parallel, such as a high-voltage light-emitting diode.

The present invention is not limited thereto. In other embodiments, the first LED unit 10 may also be a combination of a plurality of LEDs. For example, the plurality of light emitting diodes may be in the form of a combination of series, parallel or series and parallel. In a combined embodiment in which the first light emitting diode unit 10 is a plurality of light emitting diodes, the plurality of light emitting diodes may be a combination of a plurality of dispersed light emitting diodes or a plurality of light emitting diode stacks. The wafer aspect.

In this embodiment, the second LED unit 12 can also be a single LED, the cathode 121 of the control circuit 20 is coupled to the power terminal 201 of the control circuit 20, and the cathode 122 is coupled to the control input of the control circuit 20. End 203. The single-emitting diode is a combination of a plurality of small-emitting diode units in series, parallel or series-parallel, such as a high-voltage light-emitting diode.

The present invention is not limited thereto. In other embodiments, the second LED unit 12 may also be a combination of a plurality of LEDs. For example, the plurality of light emitting diodes may be in the form of a combination of series, parallel or series and parallel. In a combined embodiment in which the second LED unit 12 is a plurality of LEDs, the plurality of LEDs may be a combination of a plurality of dispersed LEDs or a plurality of LED stacks. The wafer aspect.

The invention is not limited to the first embodiment described above and its possible variations. In other words, as long as the connection structure having the first connection configuration and the second connection configuration is applied to a light-emitting diode device, the basic concept of the present invention is achieved. The second embodiment will be further enumerated below for reference.

Please refer to FIG. 2, which is a connection architecture of a second embodiment of the present invention. A block diagram of a light emitting diode device. The second embodiment differs from the first embodiment in that the light emitting diode device 200 further has a third light emitting diode unit 14. The connection architecture also has a third connection configuration 34. The third connection configuration 34 is coupled to the positive electrode 141 of the third LED unit 14 by the control output 205 of the control circuit 20 . The negative electrode 142 of the third LED unit 14 is coupled to the device output 42. The third light emitting diode unit 14 , such as the first light emitting diode unit 10 and the second light emitting diode unit 12 , may be a single light emitting diode or a combination of a plurality of light emitting diodes. This second embodiment is exemplified by a single light-emitting diode. A variation of the third LED unit 14 is, for example, a first LED unit, which is not described herein.

Referring to FIG. 3 again, it is a block diagram of a connection structure applied to a light emitting diode device 300 according to a third embodiment of the present invention. In the first and second embodiments, the power terminal 201 of the control circuit 20 is a single contact, and the negative electrode 102 of the first LED unit 10 is coupled to the power terminal 201 of the control circuit 20. The power terminal 201 of the control circuit 20 is further coupled to the anode 121 of the second LED unit 12. However, the present invention is not limited thereto. For example, the difference between the third embodiment and the second embodiment is that the power terminal 201 of the control circuit 20 of the third embodiment has a first power terminal 2010 and a second power terminal 2012. The first power terminal 2010 is connected to the anode 102 of the first LED unit 10. The second power terminal 2012 is connected to the positive electrode 121 of the second LED 12 unit. The first power terminal 2010 and the second power terminal 2012 are short-circuited. In another embodiment, the power terminal 201 of the control circuit 20 of the first embodiment can also be designed as the power terminal 201 of the third embodiment. The embodiment of the connection configuration in which the first power supply terminal 2010 of the control circuit 20 and the second power supply terminal 2012 are short-circuited has an advantage over the connection configuration of the power supply terminal 201 of the single contact in that: in addition to using a high-voltage light-emitting diode In the embodiment of the body, the stability of the overall light-emitting diode device can be maintained. Using a conventional light-emitting diode as the light-emitting diode unit of the present invention such as the first, second or third light-emitting pole In the case of the body unit, the connection arrangement in which the overall light-emitting diode device is short-circuited using the first power supply terminal 2010 and the second power supply terminal 2012 is more stable than the connection configuration of the power supply terminal of the single contact.

In addition, based on the first to third embodiments and their possible variations, the connection structure through the first connection configuration 30, the second connection configuration 32, and the third connection configuration 34 is applied to a light emitting diode. In the device, the tandem light-emitting diode device which is different from the conventional current-limiting resistor can achieve the effect of constant current control without providing an additional power supply connected to the control circuit. In addition, in the above embodiment, the power supply terminal 201 of the control circuit 20 is coupled to the negative electrode 102 of the first LED unit 10 through the first connection configuration 30, the second connection configuration 32, and the third connection configuration 34, respectively. The positive electrode 122 of the second LED unit 12 and the cathode of the second LED unit 12 are connected to the control input terminal 203, so that the control circuit 20 does not require an additional wiring configuration, and the like is formed in parallel with the second The connection structure of the light-emitting diode unit 12 has the effect that the voltage drop of the control circuit 20 is equal to the voltage drop of the second light-emitting diode unit 12.

The above is only a preferred embodiment of the present invention. The scope of the invention is not limited to the above embodiments. Equivalent modifications or variations made by persons skilled in the art in light of the teachings of the present invention are intended to be included within the scope of the following claims.

100‧‧‧Lighting diode device

10‧‧‧First LED unit

101‧‧‧ positive

102‧‧‧negative

12‧‧‧Second light-emitting diode unit

121‧‧‧ positive

122‧‧‧negative

20‧‧‧Control circuit

201‧‧‧Power terminal

203‧‧‧Control input

205‧‧‧Control output

30‧‧‧First connection configuration

32‧‧‧Second connection configuration

40‧‧‧ device input

42‧‧‧ device output

V+‧‧‧ power supply

V-‧‧‧ Grounding

Claims (19)

A connection structure of a light-emitting diode device, wherein the light-emitting diode device has a device input end and a device output end for respectively connecting a power source and a ground; a first light-emitting diode unit having a positive electrode connected thereto The device input terminal; a second LED unit; and a control circuit having a power terminal, a control input terminal and a control output terminal, the control output terminal being connected to the output end of the device, the connection structure comprising: a first connection configuration, the anode of the first LED unit is coupled to the power terminal of the control circuit, the power terminal of the control circuit is further coupled to the anode of the second LED unit, and a second connection The anode of the second LED unit is coupled to the control input of the control circuit. The connection structure of the light-emitting diode device of claim 1, wherein the first light-emitting diode unit can be selected as a single light-emitting diode or a combination of a plurality of light-emitting diodes. The connection structure of the light-emitting diode device according to claim 2, wherein the single light-emitting diode is a combination of a plurality of small light-emitting diode units in series, parallel or series-parallel. The connection structure of the light-emitting diode device of claim 3, wherein the plurality of small light-emitting diode units in the single light-emitting diode are selectable as a plurality of small light-emitting diode units dispersed A wafer aspect of a combination or a plurality of small light emitting diode unit stacks. The connection structure of the light-emitting diode device of claim 2, wherein the combination of the plurality of light-emitting diodes can be selected as a combination of series, parallel or series-parallel. The connection structure of the light-emitting diode device according to Item 2 of the claim, wherein the plurality of light-emitting diodes The combination of the polar bodies may be selected as a combination of a plurality of dispersed light emitting diodes or a plurality of light emitting diode stacked wafer states. The connection structure of the light-emitting diode according to claim 1, wherein the second light-emitting diode unit can be selected as a single light-emitting diode or a combination of a plurality of light-emitting diodes. The connection structure of the light-emitting diode device of claim 7, wherein the single light-emitting diode is a combination of a plurality of small light-emitting diode units in series, parallel or series-parallel. The connection structure of the light-emitting diode device of claim 8, wherein the plurality of small light-emitting diode units in the single light-emitting diode are selectable as a plurality of small light-emitting diode units dispersed A wafer aspect of a combination or a plurality of small light emitting diode unit stacks. The connection structure of the light-emitting diodes of claim 7, wherein the combination of the plurality of light-emitting diodes can be selected as a combination of series, parallel or series-parallel. The connection structure of the light-emitting diode device of claim 7, wherein the combination of the plurality of light-emitting diodes can be selected as a combination of a plurality of dispersed light-emitting diodes or a plurality of light-emitting diode stacks. Wafer aspect. The connection structure of the LED device of claim 1, wherein the control circuit is a current regulation circuit. The connection structure of the light-emitting diode device of claim 1, wherein the light-emitting diode device further has a third light-emitting diode unit; the connection structure further includes a third connection configuration, the control circuit The control output is connected to the anode of the third LED unit, and the cathode of the third LED unit is connected to the output of the cathode. The connection structure of the light-emitting diode device according to claim 13, wherein the third light-emitting device The diode unit can be selected as a single light emitting diode or a combination of a plurality of light emitting diodes. The connection structure of the light-emitting diode device of claim 14, wherein the single light-emitting diode is a combination of a plurality of small light-emitting diode units in series, parallel or series-parallel. The connection structure of the light-emitting diode device of claim 15, wherein the plurality of small light-emitting diode units in the single light-emitting diode are selectable as a plurality of small light-emitting diode units dispersed A wafer aspect of a combination or a plurality of small light emitting diode unit stacks. The connection structure of the light-emitting diode device of claim 14, wherein the combination of the plurality of light-emitting diodes can be selected as a combination of series, parallel or series-parallel. The connection structure of the light-emitting diode device of claim 14, wherein the combination of the plurality of light-emitting diodes can be selected as a combination of a plurality of dispersed light-emitting diodes or a plurality of light-emitting diode stacks. Wafer aspect. The connection structure of the light-emitting diode device according to any one of the preceding claims, wherein the power supply end of the control circuit has a first power terminal and a second power terminal, the first power terminal The second power terminal is connected to the anode of the second LED unit, and the first power terminal is short-circuited with the second power terminal.