TWI875493B - Light-emitting diode circuit with parallel sequence function, light-emitting diode circuit package, and light-emitting diode light string - Google Patents

Abstract

A LED circuit with a parallel sequence function includes an inner resistor, an ADC circuit, a drive circuit, and a current source. The inner resistor has a first terminal and a second terminal, the first terminal is connected to an input terminal of a power wire, and the second terminal is connected to the output terminal of the power wire. The input terminal is coupled to a controller, and receives a voltage signal generated by the controller, and an inner voltage is provided at the first terminal or the second terminal of the inner resistor. The ADC circuit receives the inner voltage. The drive circuit externally receives the voltage signal through the power wire. When the drive circuit performs a sequence mode according to a specific signal, the ADC circuit performs an analog-to-digital conversion to the inner voltage to generate a digital sequence number, and then the drive circuit stores the digital sequence number.

Description

LED circuit with parallel sequencing function, LED circuit package and LED string

The present invention relates to a light-emitting diode circuit, a light-emitting diode circuit package and a light-emitting diode lamp string, and in particular to a light-emitting diode circuit, a light-emitting diode circuit package and a light-emitting diode lamp string with a parallel sequencing function.

Since light-emitting diodes (LEDs) have advantages such as high luminous efficiency, low power consumption, long life, fast response speed, high reliability, etc., LEDs have been widely used in lighting fixtures or decorative lighting in the form of series, parallel, or series-parallel connection of light bars or light strings, such as Christmas tree lights, sports shoe lighting effects, etc.

Taking festival lighting as an example, a complete LED lamp basically includes an LED string (with multiple lamps) and a driver unit that drives the lamps. The driver unit is electrically connected to the string and provides the lamps with the required power and a control signal with luminous data, thereby controlling the lamps in a point-controlled or synchronous manner to achieve a variety of light output effects and changes of the LED lamps.

In the prior art, in order to drive the LEDs of the LED light string to emit light in a diversified manner, the LEDs have different address sequence data. The LEDs receive a light signal including light emitting data and address data: if the address sequence data of the LED is the same as the address data of the light signal, the LED emits light according to the light emitting data of the light signal; if the address sequence data of the LED is different from the address data of the light signal, the LED skips the light emitting data of the light signal.

Currently, the sequencing methods of the LEDs of the LED string are mostly complicated or difficult; for example, before the LEDs are combined into the LED string, different address sequence data need to be burned into each LED. Afterwards, the LEDs are placed and combined into the LED string in sequence according to the address sequence data. If the LEDs are not placed in sequence according to the address sequence data, the diversified light emission of the LEDs cannot be achieved correctly.

Furthermore, when the current LED light string adopts a low voltage (such as 5V) DC carrier-type parallel light string, in order to achieve carrier control, it is necessary to first sequence each LED light on the light string, so as to facilitate the subsequent carrier point control to drive the lighting mode. However, since the current of the low voltage LED light string is easily affected by disturbances, if the current is unstable, the voltage signal will be unstable, and the control IC in the LED light will not be able to accurately identify the signal.

Therefore, how to design a LED circuit, LED circuit package and LED light string with parallel sequencing function to solve the problems and technical bottlenecks existing in the prior art is an important topic studied by the inventors of this case.

One purpose of the present invention is to provide a light-emitting diode circuit with a parallel sequencing function. The light-emitting diode circuit with a parallel sequencing function includes an internal resistor, an analog/digital conversion circuit, a driving circuit and a current source. The internal resistor has a first end and a second end, the first end is connected to the input end of the power line, and the second end is connected to the output end of the power line. The input end is coupled to a controller to receive a voltage signal generated by the controller, and an internal voltage is provided at the first end or the second end of the internal resistor. The analog/digital conversion circuit is coupled to the power line to receive the internal voltage. The driving circuit is coupled to the power line and the analog/digital conversion circuit, and receives a voltage signal from the outside through the power line. The current source is coupled to the driving circuit and the analog/digital conversion circuit to provide a current path for the LED circuit. When the driving circuit executes a sequencing mode based on a specific signal, the analog/digital conversion circuit performs analog/digital conversion on an internal voltage to generate a digital serial number, and the driving circuit stores the digital serial number.

In one embodiment, after the sequencing mode is completed, the driver circuit executes the working mode. The driver circuit receives a lighting command with serial number information and lighting information generated by an external controller through a power line. When the driver circuit determines that the digital serial number matches the serial number information, the driver circuit controls the specific lighting behavior of the corresponding light-emitting diode according to the lighting information.

In one embodiment, the LED circuit with parallel sequencing function further includes a voltage regulator circuit. The voltage regulator circuit is coupled to a power line, receives an internal voltage, and converts the internal voltage into a supply voltage with a specific voltage value to provide the voltage required for the operation of the analog/digital conversion circuit.

In one embodiment, the voltage signal is a direct current voltage, a pulse voltage, or a carrier voltage.

In one embodiment, the serial number information and the luminescence information are digital values having multiple bits respectively.

In one embodiment, the luminescence information is followed by the sequence information to form a luminescence command; or the sequence information is followed by the luminescence information to form a luminescence command.

In one embodiment, the internal voltage is used to provide the voltage required for the operation of the driving circuit.

In one embodiment, the controller generates a specific signal received through the power line, and the specific signal is specifically coded.

Another object of the present invention is to provide a LED circuit package with a parallel sequencing function. The LED circuit package with a parallel sequencing function includes two power pins, at least one LED, a LED circuit and a package body. The two power pins are used to receive a voltage signal. The at least one LED is coupled to the two power pins. The LED circuit couples the two power pins and the at least one LED, and supplies power to the LED circuit through the voltage signal received by the power pins. The package body is used to encapsulate the LED circuit, the at least one LED and a portion of the two power pins, and exposes the other portion of the two power pins outside the package body.

Yet another object of the present invention is to provide a LED string with a parallel sequencing function. The LED string with a parallel sequencing function includes a plurality of LED circuits. The LED circuits are electrically connected through a power line to form a parallel structure. Each of the LED circuits includes an internal resistor, an analog/digital conversion circuit, a driving circuit, and a current source. The internal resistor has a first end and a second end, the first end is connected to the input end of the power line, and the second end is connected to the output end of the power line. The input end of the first LED circuit is coupled to the controller, receives the voltage signal generated by the controller, and provides an internal voltage at the first end or the second end of the internal resistor. The non-first input end of the LED circuit receives the internal voltage provided by the previous LED circuit or a voltage after the internal voltage passes through the internal resistor. The analog/digital conversion circuit is coupled to the power line to receive the internal voltage. The drive circuit is coupled to the power line and the analog/digital conversion circuit, and receives a voltage signal from the outside through the power line. The current source is coupled to the drive circuit and the analog/digital conversion circuit to provide a circuit path for the LED circuit. The internal resistors of the LED circuits are connected in series through the power line. When each driver circuit executes a sequencing mode based on a specific signal, each analog/digital conversion circuit performs analog/digital conversion on an internal voltage to generate a digital serial number, and each driver circuit stores the digital serial number.

In one embodiment, after the sequencing mode is completed, each driver circuit executes the working mode, and each driver circuit receives a lighting command with serial number information and lighting information generated by the controller from the outside through a power line. When each driver circuit determines that the digital serial number matches the serial number information, each driver circuit controls the corresponding light-emitting diode to perform a specific lighting behavior according to the lighting information.

In one embodiment, each of the LED circuits further includes a voltage regulator circuit, which is coupled to the power line to receive an internal voltage and convert the internal voltage into a supply voltage with a specific voltage value to provide a voltage required for the operation of the analog/digital conversion circuit.

In one embodiment, the voltage signal is a direct current voltage, a pulse voltage, or a carrier voltage.

In one embodiment, the serial number information and the luminescence information are digital values having multiple bits respectively.

In one embodiment, the luminescence information is followed by the sequence information to form a luminescence command; or the sequence information is followed by the luminescence information to form a luminescence command.

In one embodiment, the internal voltage is used to provide the voltage required for the operation of the driving circuit.

In one embodiment, the controller generates a specific signal received through the power line, and the specific signal is specifically coded.

In one embodiment, the internal voltage of the LED circuit whose electrical connection position is close to the input terminal is greater than the internal voltage of the LED circuit whose electrical connection position is far from the input terminal.

Thus, the LED circuit and LED light string with parallel sequencing function proposed by the present invention have the following characteristics and advantages: 1. The LED light string of the present invention does not need to use additional external resistors, switches or constant current circuits or devices, which can make the light string structure simple; 2. The LED circuit of the present invention sets both the internal resistor and the current source in the control IC, so that the structure of the LED light string is simple and convenient for assembly and production; 3. The present case adopts a parallel carrier design, which does not require additional wiring to design signal transmission lines, and the control IC does not need additional contacts to receive specific voltage signals, and the control is simple and intuitive.

In order to further understand the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. It is believed that the purpose, features and characteristics of the present invention can be understood in depth and in detail. However, the attached drawings are only provided for reference and explanation, and are not used to limit the present invention.

The technical content and detailed description of the present invention are described as follows with reference to the accompanying drawings.

The following is a description of the implementation of the present invention through specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and the details in the specification of the present invention can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

It should be noted that the structures, proportions, sizes, number of components, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any modification of the structure, change of the proportion relationship, or adjustment of the size shall fall within the scope of the technical contents disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

Please refer to FIG. 1A , which is a circuit block diagram of a first embodiment of the LED circuit with parallel sequencing function of the present invention. The LED circuit 10 can be in the form of an integrated circuit (IC), that is, the LED circuit is a control IC. The LED circuit 10 with parallel sequencing function includes an internal resistor R _S , an analog-to-digital (ADC) circuit 104 , a driver circuit 102 and a current source 105 .

The internal resistor _RS has a first end and a second end, wherein the first end is connected to an input end V+(in) of a power line 100, and the second end is connected to an output end V+(out) of the power line 100. The power line 100 is a power path for the LED circuit 10 to receive a voltage signal or for multiple LED circuits 10 to carry the internal voltage of the previous LED circuit 10, which will be described in detail later. In this embodiment, the input end V+(in) receives a controller 50 (i.e., an external controller), and receives a voltage signal generated by the controller 50, and after a voltage drop formed by the internal resistor _RS, an internal voltage V is provided at the second end of the internal resistor _RS , i.e., at the output end V+(out). That is, if the voltage signal is 5 volts, and the voltage drop formed by the internal resistor _RS is 0.2 volts, the internal voltage V will be 4.8 volts. Incidentally, in different embodiments, the internal resistor _RS can also be connected to the negative voltage input and output ends of the power line 100, and the technical spirit of the present invention can also be realized.

The analog/digital conversion circuit 104 is coupled to the power line 100 and receives the internal voltage V. When the driving circuit 102 executes the sequencing mode, the analog/digital conversion circuit 104 performs analog/digital conversion on the internal voltage V to generate a digital serial number Ds. For example, if the internal voltage V is 4.8 volts, the analog/digital conversion circuit 104 receives the analog voltage and converts 4.8 volts into a digital value of 00111110 through analog/digital conversion, and this digital value is the digital serial number Ds. Alternatively, if the internal voltage V is 4.6 volts, the analog/digital conversion circuit 104 receives the analog voltage and converts the 4.6 volts into a digital value of 00111101 through analog/digital conversion, and the digital value is the digital sequence number Ds. Alternatively, if the internal voltage V is 4.4 volts, the analog/digital conversion circuit 104 receives the analog voltage and converts the 4.4 volts into a digital value of 00111100 through analog/digital conversion, and the digital value is the digital sequence number Ds. Therefore, the analog/digital conversion circuit 104 converts different digital values, i.e., different digital sequences Ds, according to the different internal voltages V received.

The driver circuit 102 is coupled to the power line 100 and the analog/digital conversion circuit 104. In the sequencing mode, the driver circuit 102 receives the digital serial number Ds, which means that the digital serial number Ds generated by the analog/digital conversion circuit 104 is stored in the driver circuit 102 as its own independent serial number.

Furthermore, the driving circuit 102 further receives a voltage signal from the outside through the power line 100, which can be received through the input terminal V+(in). Specifically, the voltage signal is provided by the external controller 50, that is, the light-emitting diode circuit is externally coupled to the controller 50 and receives the voltage signal provided by the controller 50. The voltage signal is, for example but not limited to, a DC voltage, such as a DC voltage between 4V and 12V, or a pulse voltage or a carrier voltage.

Furthermore, the controller 50 further provides a light-emitting command, wherein the light-emitting command includes sequence information and light-emitting information. In one embodiment, the sequence information and the light-emitting information are respectively digital values having multiple bits. For example, the sequence information is a digital value of 00111101, and the light-emitting information is a digital value of 0010, but this is not intended to limit the present invention. Furthermore, the light-emitting information is followed by the sequence information to form a light-emitting command; or the sequence information is followed by the light-emitting information to form a light-emitting command. For example, the digital value of the serial number information being 00111101 and the digital value of the luminous information being 0010, the luminous command may be composed of the luminous information followed by the serial number information, i.e., the luminous command is "001111010010", or the luminous command may be composed of the serial number information followed by the luminous information, i.e., the luminous command is "001000111101". Of course, an identification bit (group) for separation may also be inserted between the two. Therefore, the luminous command is used to control the specific luminous behavior of the LED corresponding to the designated LED circuit.

For example, the light command "001111010010" can be expressed as the light behavior control of the light-emitting diode corresponding to the light-emitting diode circuit with the digital serial number or the self serial number "00111101" to "intermittently flash" (the default light information 0010 is intermittently flashing). Similarly, the light command "001111010010" can also be expressed as the light behavior control of the light-emitting diode corresponding to the light-emitting diode circuit with the digital serial number or the self serial number "00111101" to "intermittently flash" (the default light information 0010 is intermittently flashing).

Alternatively, the light command "001100000011" can be expressed as the light behavior control of the light-emitting diode corresponding to the light-emitting diode circuit with the digital serial number or the self serial number "00110000" being "high-frequency flashing" (the default light information 0011 is high-frequency flashing). Similarly, the light command "001100000011" can also be expressed as the light behavior control of the light-emitting diode corresponding to the light-emitting diode circuit with the digital serial number or the self serial number "00110000" being "high-frequency flashing" (the default light information 0011 is high-frequency flashing).

The current source 105 couples the driving circuit 102 and the analog/digital conversion circuit 104 to provide a current path for the LED circuit 10. In one embodiment, the current source 105 can be a constant current source, so it can be used to maintain the constant current output of the LED circuit 10, for example but not limited to 10 milliamperes. The current source 105 can be implemented by a constant current circuit or a current mirror circuit. The driving circuit 102 receives the internal voltage V, and the internal voltage V can be used to maintain the voltage required for the normal operation of the driving circuit 102.

Therefore, the driver circuit 102 receives the specific signal generated by the controller 50 to execute a sequence mode. Specifically, the specific signal is a specific code, generated by the controller 50, and received through the power line 100. When the driver circuit 102 receives the specific signal with the specific code, the sequence mode is activated. In the sequence mode, the analog/digital conversion circuit 104 performs an analog/digital conversion on the internal voltage V to generate a digital sequence number Ds, and the driver circuit 102 receives the digital sequence number Ds and stores the digital sequence number Ds to complete the sequence mode.

After the sequencing mode is completed, the driver circuit 102 executes a working mode. Specifically, the driver circuit 102 receives a light-emitting command having sequence information and light-emitting information from the controller 50 via the power line 100. When the driver circuit 102 determines that the digital sequence number Ds matches the sequence information, the driver circuit 102 controls a corresponding light-emitting diode 101 to perform a specific light-emitting behavior according to the light-emitting information. In the working mode, when the driver circuit 102 determines that the stored digital sequence number Ds matches the sequence information in the received light-emitting command, the driver circuit 102 controls a corresponding light-emitting diode 101 to perform a specific light-emitting behavior according to the light-emitting information. The so-called corresponding light-emitting diode 101 refers to the light-emitting diode 101 driven and controlled by the corresponding driving circuit 102. Specifically, when the driving circuit 102 determines that the received sequence information matches its own independent digital sequence number Ds, the driving circuit 102 controls the light-emitting diode 101 to perform the specific light-emitting behavior according to the light-emitting information in the received light-emitting command. On the contrary, if the driving circuit 102 determines that the received sequence information does not match its own digital sequence number Ds, the corresponding light-emitting diode 101 is not controlled. As for the light-emitting control operation, please refer to the above description, which will not be elaborated here.

Incidentally, although the LED 101 is shown in the LED circuit 10, it is only for the convenience of explaining the operation relationship with other circuit elements. In fact, the LED 101 is coupled to the LED circuit 10 in an external connection manner. The number of LEDs 101 can be, for example but not limited to, one (single color), two (red plus green light), three (three primary colors), four (three primary colors plus white light), etc., and can be increased or decreased according to actual needs. FIG. 1A is a schematic diagram of a three primary color lamp. Each LED 101 includes an anode end and a cathode end, wherein the positive end receives a DC voltage to operate.

As shown in FIG1A , the LED circuit with parallel sequencing function further includes a voltage regulator circuit 103, or a voltage regulating (adjusting) circuit. The voltage regulator circuit 103 is coupled to the power line 100, receives the internal voltage V, and converts the internal voltage V into a supply voltage Vcc having a specific voltage value (e.g., a working voltage of 2.5 volts) to provide the supply voltage Vcc to the analog/digital conversion circuit 104 to maintain the voltage required for the normal operation of the analog/digital conversion circuit 104.

Please refer to FIG. 1B , which is a circuit block diagram of the second embodiment of the light-emitting diode circuit with parallel sequencing function of the present invention. The biggest difference between the second embodiment shown in FIG. 1B and the first embodiment shown in FIG. 1A is the connection position of the internal resistor _RS . In the second embodiment shown in FIG. 1B , the first end of the internal resistor _RS is connected to the input terminal V+(in) of the power line 100, and the second end is connected to the output terminal V+(out) of the power line 100. In this embodiment, the input terminal V+(in) receives a voltage signal, i.e., an internal voltage V, and a voltage of the internal voltage V after passing through the internal resistor _RS (i.e., the internal voltage V minus the voltage drop formed by the internal resistor _RS ) is provided at the output terminal V+(out). Since the rest of the circuit operations of the second embodiment are similar or the same as those of the first embodiment, they will not be described in detail here.

Please refer to FIG. 2, which is a circuit block diagram of the LED string with parallel sequencing function of the present invention. The LED string shown in FIG. 2 includes a plurality of LED circuits 10_1 to 10_N shown in FIG. 1A or FIG. 1B. The LED circuits 10_1 to 10_N are electrically connected through the power line 100 to form a parallel structure, and the LED string is powered by a voltage signal. The voltage signal is a DC voltage, a pulse voltage or a carrier voltage, but the present invention is not limited thereto. As mentioned above, the LED string includes a plurality of LED circuits 10_1 to 10_N, so each LED circuit 10_1 to 10_N includes an internal resistor, an analog/digital conversion circuit, a driving circuit, and a current source. Incidentally, the LED circuits 10_1 to 10_N shown in FIG. 2 are only for simple illustration and do not represent their complete internal circuits. The complete internal circuits can be found in FIG. 1A or FIG. 1B.

Taking FIG. 2 as an example, the LED lamp string with parallel sequencing function includes a first LED circuit 10_1, a second LED circuit 10_2, ... and an Nth LED circuit 10_N. The first LED circuit 10_1 mainly includes a first internal resistor _RS1 and a first current source _IC1 ; the second LED circuit 10_2 mainly includes a second internal resistor _RS2 and a second current source _IC2 ; the Nth LED circuit 10_N mainly includes an Nth internal resistor _RSN and an Nth current source _ICn .

Internal resistors _RS1 , _RS2 , _RSN are connected between the input and output ends of the power line 100, wherein the input end of the first of the LED circuits 10_1~10_N (i.e., the first LED circuit 10_1) receives a voltage signal, and an internal voltage is provided at the first end of the internal resistor _RS1 (see the embodiment of FIG. 1B) or at the second end of the internal resistor _RS1 (see the embodiment of FIG. 1A). Furthermore, the input terminals of the LED circuits 10_1-10_N other than the first one (i.e., the second LED circuit 10_2 to the Nth LED circuit 10_N) receive the internal voltages _V1 , _V2 , ... VN provided by the previous LED circuit 10_1-10_N (see the embodiment of FIG. 1A), or the internal voltages _V1 , V2, ... _VN provided by the previous LED circuit 10_1-10_N after passing through _the internal resistors _RS1 , _RS2 , _RSN (see the embodiment of FIG _. 1B).

For example, in conjunction with the embodiment of FIG. 1A , the first internal resistor _RS1 of the first LED circuit 10_1 is connected between the input terminal V+(in1) and the output terminal V+(out1) of the power line 100, and receives a voltage signal, which is assumed to be 5 volts. After the voltage drop (e.g., 0.2 volts) formed by the first internal resistor _RS1 , a first internal voltage _V1 of 4.8 volts is provided at the output terminal V+(out1). Similarly, the second internal resistor _RS2 of the second LED circuit 10_2 is connected between the input terminal V+(in2) and the output terminal V+(out2) of the power line 100, and receives the internal voltage provided by the previous LED circuit, that is, the first internal voltage _V1 (i.e., 4.8 volts) provided by the first LED circuit 10_1. After the voltage drop (e.g., 0.2 volts) formed by the second internal resistor _RS2 , a second internal voltage _V2 of 4.6 volts is provided at the output terminal V+(out2). Similarly, the Nth internal resistor R _SN of the Nth LED circuit 10_N is connected between the input terminal V+(inN) and the output terminal V+(outN) of the power line 100, and receives the internal voltage provided by the previous LED circuit, that is, the N-1th internal voltage V _N-1 (assuming N is 10, i.e. 3.2V) provided by the N-1th LED circuit 10_N-1. After the voltage drop (e.g. 0.2V) formed by the Nth internal resistor R _SN , the Nth internal voltage V _N is provided at the output terminal V+(outN) as 3.0V. That is, the first internal voltage _V1 on the first LED circuit 10_1 is greater than the second internal voltage _V2 on the second LED circuit 10_2, ... and so on, that is, the voltage generated by the front (upstream) LED circuit is greater than the internal voltage generated by the rear (downstream) LED circuit ( _V1 >V2>...> _{VN )} . In this way, the LED circuits 10_1~10_N are sequenced according to the different sizes of the generated internal voltages _V1 , _V2 , ..., _VN .

Therefore, the first analog/digital conversion circuit receives the first internal voltage V ₁ and performs analog/digital conversion on the first internal voltage V ₁ to generate a first digital serial number, for example, the first internal voltage V ₁ of 4.8 volts is converted into a digital value of 00111110 through analog/digital conversion, and this digital value is the first digital serial number. Similarly, the second analog/digital conversion circuit receives the second internal voltage V ₂ and performs analog/digital conversion on the second internal voltage V ₂ to generate a second digital serial number, for example, the second internal voltage V ₂ of 4.6 volts is converted into a digital value of 00111101 through analog/digital conversion, and this digital value is the second digital serial number. By analogy, the Nth analog/digital conversion circuit receives the Nth internal voltage V _N and performs analog/digital conversion on the Nth internal voltage V _N to generate the Nth digital serial number. For example, the 3.0 volt Nth internal voltage V _N is converted into a digital value of 00110101 through analog/digital conversion, and this digital value is the Nth digital serial number. The correspondence between the aforementioned internal voltage and the digital value (i.e., the digital serial number) is as follows, but the present invention is not limited thereto. N Internal voltage (V) Digital serial number 1 V ₁ =4.8 00111110 2 _V2 =4.6 00111101 3 V ₃ =4.4 00111100 4 _V4 =4.2 00111011 5 V ₅ =4.0 00111010 6 _V6 =3.8 00111001 7 _V7 =3.6 00111000 8 _V8 =3.4 00110111 9 V ₉ =3.2 00110110 10 V ₁₀ =3.0 00110101

Please refer to FIG3, which is a voltage diagram of the LED string with parallel sequencing function of the present invention. Through the synergistic effect of the voltage drop formed by the internal resistance _RS1 , _RS2 , _RSN provided by each LED circuit 10_1-10_N and the current source, the internal voltage _V1 , _V2 , ... _VN of each LED circuit 10_1-10_N is different, which means that it gradually decreases in this embodiment. The present invention also utilizes the difference in internal voltage V ₁ , V ₂ , . . . V _N of each LED circuit 10_1 - 10_N as the basis for sequencing each LED circuit 10_1 - 10_N, so that each LED circuit 10_1 - 10_N has uniqueness in sequencing, thereby greatly improving the accuracy of LED string sequencing.

Therefore, each driver circuit stores the digital serial number Ds, that is, the first driver circuit of the first LED circuit 10_1 stores the digital serial number "00111110", the second driver circuit of the second LED circuit 10_2 stores the digital serial number "00111101", and so on, the Nth driver circuit of the Nth LED circuit 10_N stores the digital serial number "00110101". Furthermore, the driver circuits compare the serial number information of the received light-emitting command with the stored digital serial number Ds. When the driver circuit 102 determines that the received serial number information matches the stored digital serial number Ds, the corresponding light-emitting diode 101 is controlled to perform a specific light-emitting behavior (e.g., intermittent flashing, high-frequency flashing, colorful flashing, ticker, etc.). For example, assuming that the digital serial number stored in the first driver circuit is set to "00111110". If the serial number information received by the first driver circuit is "00111110" and matches the digital serial number, the first driver circuit controls the corresponding light-emitting diode 101 to perform a specific light-emitting behavior. On the contrary, if the serial number information received by the first driver circuit is "00111101" which does not match the digital serial number, the first driver circuit does not control the corresponding LED 101 to perform a specific light-emitting behavior. The operation of other driver circuits is the same or similar to that of the first driver circuit, so no further description is given.

Furthermore, after each LED circuit 10_1~10_N completes the digital serial number storage according to different positions, the position of the light string can be further confirmed with an external mobile device through a light string controller. The mobile device can be a smart phone, a tablet computer, a wearable device, etc. The mobile device at least has a camera or camera lens that can capture images, collectively referred to as an image capture unit. For example, the light string controller, that is, the external controller 50, will scan the code according to the built-in digital serial number range value (for example, 00000000~11111111) to output a carrier light command, wherein the light command includes serial number information and light information. When the serial number information matches the digital serial number Ds of the driving circuit, the corresponding LED lamp is controlled to start the lighting process. At the same time, the mobile device records the position of the corresponding light string of the LED lamp through image capture, and sends the position information to the light string controller so that the light string controller can store it. That is, the light string controller can only completely control the light emission of the LED lamp after storing the two sets of data, the digital serial number and the light string position.

Please refer to FIG. 4, which is a three-dimensional schematic diagram of the LED circuit package with parallel sequencing function of the present invention. The LED circuit package includes two power pins, at least one LED 101, a LED circuit 10 and a package body 20. The two power pins are used to receive a voltage signal. At least one LED 101 is coupled to the two power pins Vdd and Vss. For the specific description of the LED circuit 10, please refer to the above content, which will not be elaborated here. The package body 20 is used to encapsulate the LED circuit 10, the at least one LED 101 and a part of the two power pins, and the other part of the two power pins is exposed outside the package body 20.

In summary, the present invention has the following features and advantages:

1. The LED light string of the present invention does not need to use additional external resistors, switches or constant current circuits or devices, which can make the light string structure simple and simplify the circuit design.

2. The LED circuit of the present invention places both the internal resistor and the current source in the control IC, so that the structure of the LED string is simple and convenient for assembly and production.

3. This case adopts a parallel carrier design, which does not require additional wiring to design signal transmission lines, and the control IC does not need additional contacts to receive specific voltage signals, making control simple and intuitive.

The above description is only a detailed description and drawings of the preferred specific embodiments of the present invention, but the features of the present invention are not limited thereto and are not intended to limit the present invention. The entire scope of the present invention shall be subject to the following patent application scope. All embodiments that conform to the spirit of the patent application scope of the present invention and similar variations thereof shall be included in the scope of the present invention. Any changes or modifications that can be easily thought of by anyone familiar with the art within the field of the present invention shall be covered by the following patent scope of the present case.

10: LED circuit 10_1~10_N: LED circuit 100: Power line 101: LED 102: Driver circuit 103: Voltage regulator circuit 104: Analog/digital conversion circuit 105: Current source 50: Controller _RS : Internal resistor _RS1 , _RS2 , _RSN : Internal resistor V+(in): Input terminal V+(in1), V+(in2), V+(inN): Input terminal V+(out): Output terminal V+(out1), V+(out2), V+(outN): Output terminal V: Internal voltage _V1 , _V2 , ... _VN : Internal voltage Vcc: Supply voltage Ds: Digital serial number 20: Package body Vdd, Vss: Power pins

FIG. 1A is a circuit block diagram of a first embodiment of a light-emitting diode circuit with a parallel sequencing function according to the present invention.

FIG. 1B is a circuit block diagram of a second embodiment of the light-emitting diode circuit with parallel sequencing function of the present invention.

FIG. 2 is a circuit block diagram of the LED string with parallel sequencing function of the present invention.

FIG. 3 is a voltage diagram of the LED string with parallel sequencing function of the present invention.

FIG. 4 is a three-dimensional schematic diagram of the LED circuit package with parallel sequencing function of the present invention.

10: LED circuit

100: Power cord

101: LED

102: Driving circuit

103: Voltage regulator circuit

104: Analog/digital conversion circuit

105: Current source

50: Controller

R _S : Internal resistance

V+(in): input terminal

V+(out): output terminal

V: internal voltage

Vcc: power supply voltage

Ds: Digital serial number

Claims (18)

A light-emitting diode circuit with a parallel sequencing function comprises: an internal resistor having a first end and a second end, the first end being connected to an input end of a power line, and the second end being connected to an output end of the power line; wherein the input end is coupled to a controller, receives a voltage signal generated by the controller, and provides an internal voltage at the first end or the second end of the internal resistor; an analog/digital conversion circuit, coupled to the power line, receives the internal voltage; a driving circuit, coupled to the power line and the analog/digital conversion circuit, and receives the voltage signal from the outside through the power line; and a current source, coupled to the driving circuit and the analog/digital conversion circuit, to provide a current path for the light-emitting diode circuit; When the driving circuit executes a certain sequence mode based on a specific signal, the analog/digital conversion circuit performs an analog/digital conversion on the internal voltage to generate a digital serial number, and the driving circuit stores the digital serial number. A light-emitting diode circuit with a parallel sequencing function as described in claim 1, wherein after the sequencing mode is completed, the driver circuit executes a working mode, and the driver circuit receives a light-emitting command with serial number information and light-emitting information generated by the controller from the outside through the power line. When the driver circuit determines that the digital serial number matches the serial number information, the driver circuit controls a corresponding light-emitting diode to perform a specific light-emitting behavior according to the light-emitting information. The LED circuit with parallel sequencing function as described in claim 1 further includes: A voltage regulator circuit coupled to the power line, receiving the internal voltage, and converting the internal voltage into a supply voltage with a specific voltage value to provide the voltage required for the operation of the analog/digital conversion circuit. A light-emitting diode circuit with parallel sequencing function as described in claim 1, wherein the voltage signal is a DC voltage, a pulse voltage or a carrier voltage. A light-emitting diode circuit with a parallel sequencing function as described in claim 2, wherein the serial number information and the light-emitting information are respectively digital values with multiple bits. A light-emitting diode circuit with a parallel sequencing function as described in claim 5, wherein the light-emitting information is followed by the serial number information to form the light-emitting command; or the serial number information is followed by the light-emitting information to form the light-emitting command. A light-emitting diode circuit with parallel sequencing function as described in claim 1, wherein the internal voltage is used to provide the voltage required for the operation of the driving circuit. A light-emitting diode circuit with a parallel sequencing function as described in claim 1, wherein the controller generates the specific signal, the driving circuit receives the specific signal through the power line, and the specific signal is a specific code. A LED circuit package with parallel sequencing function, comprising: Two power pins for receiving a voltage signal; At least one LED coupled to the two power pins; The LED circuit as described in any one of claim 1 to claim 8, the LED circuit couples the two power pins and the at least one LED, and the LED circuit is powered by the voltage signal received by the power pins; and A package body for encapsulating the LED circuit, the at least one LED and a part of the two power pins, and exposing the other part of the two power pins outside the package body. A LED light string with parallel sequencing function, comprising: A plurality of LED circuits, the LED circuits are electrically connected via a power line to form a parallel structure, each LED circuit comprising: An internal resistor having a first end and a second end, the first end being connected to an input end of a power line, and the second end being connected to an output end of the power line; wherein the input end of the first of the LED circuits is coupled to a controller, receives a voltage signal generated by the controller, and provides an internal voltage at the first end or the second end of the internal resistor, and the input end of the non-first of the LED circuits receives the internal voltage provided by the previous LED circuit or a voltage of the internal voltage after passing through the internal resistor; An analog/digital conversion circuit coupled to the power line, receives the internal voltage; A driving circuit coupled to the power line and the analog/digital conversion circuit, and receives the voltage signal from the outside through the power line; and A current source is coupled to the driving circuit and the analog/digital conversion circuit to provide a current path for the LED circuit; wherein the internal resistors of the LED circuits are connected in series through the power line; wherein when each of the driving circuits executes a certain sequence mode based on a specific signal, each of the analog/digital conversion circuits performs an analog/digital conversion on the internal voltage to generate a digital serial number, and each of the driving circuits stores the digital serial number. A LED light string with a parallel sequencing function as described in claim 10, wherein after the sequencing mode is completed, each of the driver circuits executes a working mode, and each of the driver circuits receives a lighting command having a serial number information and a lighting information generated by the controller from the outside through the power line. When each of the driver circuits determines that the digital serial number matches the serial number information, each of the driver circuits controls a corresponding LED to perform a specific lighting behavior according to the lighting information. As described in claim 10, the LED string with parallel sequencing function, wherein each LED circuit further includes: A voltage regulator circuit coupled to the power line, receiving the internal voltage, and converting the internal voltage into a supply voltage with a specific voltage value to provide the voltage required for the operation of the analog/digital conversion circuit. A light-emitting diode lamp string with parallel sequencing function as described in claim 10, wherein the voltage signal is a DC voltage, a pulse voltage or a carrier voltage. A light-emitting diode lamp string with a parallel sequencing function as described in claim 11, wherein the serial number information and the light-emitting information are respectively digital values having multiple bits. A light-emitting diode lamp string with a parallel sequencing function as described in claim 14, wherein the light-emitting information follows the serial number information to form the light-emitting command; or the serial number information follows the light-emitting information to form the light-emitting command. A light-emitting diode lamp string with parallel sequencing function as described in claim 10, wherein the internal voltage is used to provide the voltage required for the operation of the driving circuit. A light-emitting diode lamp string with parallel sequencing function as described in claim 10, wherein the controller generates the specific signal, the driving circuit receives the specific signal through the power line, and the specific signal is a specific code. The LED light string with parallel sequencing function as described in claim 10, wherein the internal voltage of the LED circuit whose electrical connection position is close to the input end is greater than the internal voltage of the LED circuit whose electrical connection position is far from the input end.

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