CN116390289B - LED driving chip and LED lighting equipment - Google Patents
LED driving chip and LED lighting equipment Download PDFInfo
- Publication number
- CN116390289B CN116390289B CN202310584924.XA CN202310584924A CN116390289B CN 116390289 B CN116390289 B CN 116390289B CN 202310584924 A CN202310584924 A CN 202310584924A CN 116390289 B CN116390289 B CN 116390289B
- Authority
- CN
- China
- Prior art keywords
- signal
- unit
- output
- module
- input
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 claims abstract description 120
- 238000005070 sampling Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The application relates to an LED driving chip and LED lighting equipment, the LED driving chip includes first external end, second external end, first signal transceiver control module, second signal transceiver control module, signal processing module and voltage detection module. When a plurality of LED driving chips are connected in series to form a lamp strip, the LED driving chips detect trigger signals through the voltage detection module, which external terminal firstly receives the signals can be judged, and the transmission direction of the signals is obtained, so that the first signal receiving and transmitting control module and the second signal receiving and transmitting control module can be controlled based on the transmission direction of the signals, and the receiving and transmitting of the signals are realized. Each LED driving chip can receive signals from any external terminal and then output subsequent signals through the other external terminal, so that the signals can be transmitted from the two ends of the lamp strip at the same time, the total time for configuring the lamp strip is shortened, and the refresh rate of the lamp strip is improved.
Description
Technical Field
The application belongs to the technical field of LED illumination, and particularly relates to an LED driving chip and LED illumination equipment.
Background
At present, in a light-emitting diode (LED) lighting system, a plurality of LED light emitting chips may be sequentially connected in series in a cascading manner, and each LED light emitting chip controls a corresponding light emitting unit, so as to form a light band. By sending a data packet to the first LED light-emitting chip, after the first LED light-emitting chip acquires the first group of data, the first LED light-emitting chip transmits the subsequent signals backwards, and so on until each LED chip acquires a group of data, thereby realizing unidirectional transmission of the data. When the number of chips in cascade is too large, the refresh rate of the whole lamp strip is low, and the application of the product is limited.
Disclosure of Invention
The purpose of this application is to provide a LED driving chip and LED lighting apparatus, aims at solving the lower problem of refresh rate that traditional LED lamp area exists.
A first aspect of an embodiment of the present application provides an LED driving chip, including: the first external connection end is used for being connected with an external circuit to send or receive driving signals; a second external terminal for connecting with an external circuit to transmit or receive a driving signal; the device comprises a first signal receiving and transmitting control module, a second signal receiving and transmitting control module and a signal processing module, wherein a first end of the first signal receiving and transmitting control module is connected with the first external end, a second end of the first signal receiving and transmitting control module is connected with the signal processing module, a first end of the second signal receiving and transmitting control module is connected with the second external end, and a second end of the second signal receiving and transmitting control module is connected with the signal processing module; the voltage detection module is connected with the first external connection end and the second external connection end respectively, and is configured to output corresponding receiving and transmitting control signals according to the sequence of the trigger signals received by the first external connection end and the second external connection end; wherein the drive signal comprises the trigger signal; the voltage detection module outputs the receiving and transmitting control signal to control the first signal receiving and transmitting control module to transmit the driving signal received from the first external terminal to the signal processing module under the condition that the first external terminal receives the trigger signal first, and controls the second signal receiving and transmitting control module to output the driving signal sent by the signal processing module from the second external terminal; and the voltage detection module outputs the receiving and transmitting control signal to control the second signal receiving and transmitting control module to transmit the driving signal received from the second external terminal to the signal processing module under the condition that the second external terminal receives the trigger signal first, and controls the first signal receiving and transmitting control module to output the driving signal sent by the signal processing module from the first external terminal.
In one embodiment, the LED driving chip further includes an overcurrent detection module, where the overcurrent detection module is connected to the first external terminal and the second external terminal, and the first signal transceiver control module and the second signal transceiver control module, respectively; the overcurrent detection module is configured to detect output currents of the first external connection terminal and the second external connection terminal, and send an overcurrent detection signal to the first signal transceiving control module when the output current of the first external connection terminal is greater than a preset threshold value, or send the overcurrent detection signal to the second signal transceiving control module when the output current of the second external connection terminal is greater than the preset threshold value; the first signal receiving and transmitting control module and the second signal receiving and transmitting control module are further configured to stop transmitting the driving signal to the corresponding external terminal under the condition that the overcurrent detection signal is received.
In one embodiment, the over-current detection module includes a first over-current detection unit and a second over-current detection unit; the first overcurrent detection unit is respectively connected with the first external connection end and the first signal receiving and transmitting control module, and is configured to send the overcurrent detection signal to the first signal receiving and transmitting control module under the condition that the output current of the first external connection end is larger than a preset threshold value; the second overcurrent detection unit is respectively connected with the second external connection end and the second signal receiving and transmitting control module, and is configured to send the overcurrent detection signal to the second signal receiving and transmitting control module under the condition that the output current of the second external connection end is larger than a preset threshold value.
In one embodiment, the first signal transceiver control module includes a first output switch unit, a first input switch unit and a first logic control unit; the first end of the first output switch unit is connected with the first external connection end, the second end of the first output switch unit is connected with the output end of the signal processing module, the first end of the first input switch unit is connected with the first external connection end, the second end of the first input switch unit is connected with the input end of the signal processing module, and the first logic control unit is respectively connected with the controlled end of the first output switch unit, the controlled end of the first input switch unit, the voltage detection module and the overcurrent detection module; the first logic control unit is configured to control on and off of the first output switch unit and the first input switch unit according to the transceiving control signal and the overcurrent detection signal.
In one embodiment, the first logic control unit includes a first logic gate, a second logic gate, and a first inverter; the input end of the first inverter is connected with the voltage detection module, the output end of the first inverter is connected with the first input end of the first logic gate, the second input end of the first logic gate is connected with the overcurrent detection module, the output end of the first logic gate is connected with the controlled end of the first output switch unit, the first input end of the second logic gate is connected with the input end of the first inverter, the second input end of the second logic gate is connected with the second input end of the first logic gate, and the output end of the second logic gate is connected with the controlled end of the first input switch unit.
In one embodiment, the first signal transceiver control module includes a second output switch unit, a second input switch unit and a second logic control unit; the first end of the second output switch unit is connected with the first external connection end, the second end of the second output switch unit is connected with the output end of the signal processing module, the first end of the second input switch unit is connected with the first external connection end, the second end of the second input switch unit is connected with the input end of the signal processing module, and the second logic control unit is respectively connected with the controlled end of the second output switch unit, the controlled end of the second input switch unit, the voltage detection module and the overcurrent detection module; the second logic control unit is configured to control on and off of the second output switch unit and the second input switch unit according to the transceiving control signal and the overcurrent detection signal.
In one embodiment, the second logic control unit includes a third logic gate, a fourth logic gate, a second inverter and a third inverter; the input end of the second inverter is connected with the voltage detection module, the output end of the second inverter is connected with the input end of the third inverter, the output end of the third inverter is connected with the first input end of the third logic gate, the second input end of the third logic gate is connected with the overcurrent detection module, the output end of the third logic gate is connected with the controlled end of the second output switch unit, the first input end of the fourth logic gate is connected with the input end of the third inverter, the second input end of the fourth logic gate is connected with the second input end of the third logic gate, and the output end of the fourth logic gate is connected with the controlled end of the second input switch unit.
In one embodiment, the voltage detection module includes a first voltage detection unit, a second voltage detection unit, and a priority processing unit; the first voltage detection unit is respectively connected with the first external connection end and the priority processing unit, and the second voltage detection unit is respectively connected with the second external connection end and the priority processing unit; the first voltage detection unit is configured to sample the voltage of the first external terminal and send a sampling result to the priority processing unit; the second voltage detection unit is configured to sample the voltage of the second external terminal and send a sampling result to the priority processing unit; the priority processing unit is configured to obtain the sequence of the trigger signals received by the first external terminal and the second external terminal according to the received sampling result, and output the corresponding receiving and transmitting control signals.
A second aspect of the embodiments of the present application provides an LED lighting device, including a plurality of LED lamps, and further including a control device and a plurality of LED driving chips as set forth in any one of claims 1 to 8, where each LED driving chip is connected to and drives at least one of the LED lamps to emit light; the LED driving chips are sequentially connected in series to form a cascade driving circuit, the control device is respectively connected with two ends of the cascade driving circuit, the control device is configured to respectively send a first driving signal and a second driving signal to two ends of the cascade driving circuit, and the first driving signal and the second driving signal are used for configuring working parameters of the LED driving chips.
In one embodiment, the first driving signal and the second driving signal each include a plurality of sets of data, one set of data corresponds to one LED driving chip, and an arrangement order of the sets of data in the first driving signal is opposite to an arrangement order of the sets of data in the second driving signal.
Compared with the prior art, the embodiment of the application has the beneficial effects that: when a plurality of LED driving chips are combined with LED lamps in series to form the LED lighting equipment, driving signals can be simultaneously transmitted from two ends of the LED lighting equipment to drive the LED lamps, each LED driving chip in the LED lighting equipment detects a trigger signal in the driving signals through a voltage detection module, the voltage detection module can judge which external end firstly receives the driving signals and drives the LEDs to emit light, and the transmission direction of the driving signals at the position is obtained, so that the first signal receiving and transmitting control module and the second signal receiving and transmitting control module can be controlled based on the transmission direction of the driving signals, and the receiving and transmitting of the signals are realized. Therefore, each LED driving chip can receive signals from any external terminal, then outputs subsequent signals through the other external terminal, and shortens the transmission time of one frame of driving signals, improves the refresh rate of the lamp strip and improves the adaptability of the lamp strip in high refresh rate application occasions under the condition that the driving signals start to be transmitted from the two ends of the LED lighting equipment at the same time.
Drawings
Fig. 1 is a schematic diagram of an LED driving chip according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an LED driving chip according to another embodiment of the present disclosure;
fig. 3 is a specific circuit diagram of a signal transceiver control module according to an embodiment of the present application;
fig. 4 is a schematic diagram of an LED driving chip according to another embodiment of the present disclosure;
fig. 5 is a schematic diagram of an LED lighting device according to an embodiment of the present application.
The above figures illustrate: 10. an LED driving chip; 20. an LED lighting device; 30. a control device; 40. an LED lamp; 100. a first external connection end; 200. a second external terminal; 300. a first signal receiving and transmitting control module; 310. a first output switching unit; 320. a first input switching unit; 330. a first logic control unit; 400. a second signal receiving and transmitting control module; 410. a second output switching unit; 420. a second input switching unit; 430. a second logic control unit; 500. a signal processing module; 600. a voltage detection module; 610. a first voltage detection unit; 620. a second voltage detection unit; 630. a priority processing unit; 700. an overcurrent detection module; 710. a first overcurrent detection unit; 720. and a second overcurrent detection unit.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Fig. 1 is a schematic diagram of an LED driving chip according to an embodiment of the present application, and for convenience of explanation, only the portions related to the present embodiment are shown, which are described in detail below:
an LED driver chip, comprising: the first external terminal 100, the second external terminal 200, the first signal transceiving control module 300, the second signal transceiving control module 400, the signal processing module 500 and the voltage detection module 600.
The first external terminal 100 is used for connecting with an external circuit to send or receive a driving signal. The second external terminal 200 is used for connecting with an external circuit to transmit or receive a driving signal. The first end of the first signal transceiver control module 300 is connected to the first external terminal 100, the second end of the first signal transceiver control module 300 is connected to the signal processing module 500, the first end of the second signal transceiver control module 400 is connected to the second external terminal 200, and the second end of the second signal transceiver control module 400 is connected to the signal processing module 500. The voltage detection module 600 is connected to the first external terminal 100 and the second external terminal 200, respectively, and the voltage detection module 600 is configured to output corresponding transceiving control signals according to the sequence in which the first external terminal 100 and the second external terminal 200 receive the trigger signals. In the case that the first external terminal 100 receives the trigger signal, the voltage detection module 600 outputs a transceiving control signal to control the first signal transceiving control module 300 to transmit the signal received from the first external terminal 100 to the signal processing module 500, and controls the second signal transceiving control module 400 to output the signal sent from the signal processing module 500 from the second external terminal 200. In the case that the second external terminal 200 receives the trigger signal, the voltage detection module 600 outputs a transceiving control signal to control the second signal transceiving control module 400 to transmit the signal received from the second external terminal 200 to the signal processing module 500, and controls the first signal transceiving control module 300 to output the signal sent from the signal processing module 500 from the first external terminal 100. Wherein the driving signal includes a trigger signal, which may be the first high level signal in the driving signal. The signal processing module 500 may be an integrated circuit.
Wherein, each LED driving chip can be integrated with an LED light emitting chip or connected with a light emitting LED chip. When a plurality of LED driving chips are connected in series to form a lamp strip, driving signals can be transmitted from two ends of the lamp strip at the same time to form the lamp strip, each LED driving chip can detect a trigger signal through the voltage detection module 600, the voltage detection module 600 can judge which external end receives the driving signals firstly to obtain the transmission direction of the driving signals, and accordingly the first signal receiving and transmitting control module 300 and the second signal receiving and transmitting control module 400 can be controlled based on the transmission direction of the driving signals to realize the receiving and transmitting of the driving signals. Each LED driving chip can receive a driving signal from any external end and then output a subsequent driving signal through the other external end (namely, each external end of the LED driving chip can be used as an input end or an output end), so that signals can be transmitted from two ends of the lamp strip at the same time, the total time for configuring the lamp strip is shortened, and the refresh rate of the lamp strip is improved.
For example, in a light band composed of N conventional LED driving chips, since each conventional LED driving chip can only realize unidirectional transmission of driving signals, that is, only the first driving signal S1 can be sent from the head end of the light band, the first driving signal S1 includes data D1, data D2, and data D3 … … data Dn sequentially arranged in sequence, the first driving signal S1 is unidirectional transmitted in the light band, each group of data corresponds to one LED driving chip, and after the first LED driving chip receives the data D1, the subsequent data D2 and data D3 … … data Dn are sent to the next LED driving chip, and so on, so as to configure each LED driving chip. In the light band formed by sequentially connecting the N LED driving chips in series, the first driving signal S1 and the second driving signal S2 can be respectively sent from the head end and the tail end of the light band, wherein the second driving signal S2 comprises data Dn, data Dn-1 and data Dn-2 … … data D1 which are sequentially arranged. Therefore, only half of the time of the traditional scheme is needed, the lamp strip composed of the LED driving chips can be configured for each LED driving chip, and then the refresh rate of the lamp strip can be improved.
In an embodiment, as shown in fig. 2, the LED driving chip further includes an over-current detection module 700, and the over-current detection module 700 is connected to the first external terminal 100 and the second external terminal 200, and the first signal transceiver control module 300 and the second signal transceiver control module 400, respectively. The overcurrent detection module 700 is configured to detect output currents of the first external terminal 100 and the second external terminal 200, and send an overcurrent detection signal to the first signal transceiving control module 300 if the output current of the first external terminal 100 is greater than a preset threshold, or send an overcurrent detection signal to the second signal transceiving control module 400 if the output current of the second external terminal 200 is greater than the preset threshold. The over-current detection signal is used for controlling the first signal receiving and transmitting control module 300 and the second signal receiving and transmitting control module 400 to stop transmitting signals to the corresponding external terminals, that is, the first signal receiving and transmitting control module 300 and the second signal receiving and transmitting control module 400 are configured to stop transmitting the driving signals to the corresponding external terminals when the over-current detection signal is received.
When the lamp strip formed by the LED driving chips comprises an even number of LED driving chips, the middle two LED driving chips can send driving signals to the other LED driving chips at the same time, when one LED driving chip sends out high level at a certain moment, the other LED driving chip sends out low level, the circuit is short-circuited, so that the current can be monitored in real time through the overcurrent detection module 700, and the circuit short-circuit is avoided.
When the lamp strip formed by the LED driving chips comprises an odd number of LED driving chips, the two ends of the LED driving chip positioned in the middle can receive driving signals, but the situation that the LED driving chip positioned in the middle and the other LED driving chip mutually send the driving signals can not occur.
In one embodiment, as shown in fig. 2, the over-current detection module 700 includes a first over-current detection unit 710 and a second over-current detection unit 720. The first overcurrent detection unit 710 is connected to the first external terminal 100 and the first signal transceiver control module 300, respectively, and the first overcurrent detection unit 710 is configured to send an overcurrent detection signal to the first signal transceiver control module 300 when the output current of the first external terminal 100 is greater than a preset threshold. The second overcurrent detection unit 720 is connected to the second external terminal 200 and the second signal transceiving control module 400, respectively, and the second overcurrent detection unit 720 is configured to send an overcurrent detection signal to the second signal transceiving control module 400 when the output current of the second external terminal 200 is greater than a preset threshold.
Since the first external terminal 100 and the second external terminal 200 can both be output terminals of the chip, the first overcurrent detecting unit 710 and the second overcurrent detecting unit 720 are required to monitor the current of the first external terminal 100 and the second external terminal 200, respectively.
In an embodiment, as shown in fig. 3, the first signal transceiving control module 300 includes a first output switch unit 310, a first input switch unit 320, and a first logic control unit 330. The first end of the first output switch unit 310 is connected to the first external terminal 100, the second end of the first output switch unit 310 is connected to the output terminal OUT of the signal processing module 500, the first end of the first input switch unit 320 is connected to the first external terminal 100, the second end of the first input switch unit 320 is connected to the input terminal IN of the signal processing module 500, and the first logic control unit 330 is connected to the controlled end of the first output switch unit 310, the controlled end of the first input switch unit 320, the voltage detection module 600, and the overcurrent detection module 700, respectively. The first logic control unit 330 is configured to control on and off of the first output switching unit 310 and the first input switching unit 320 according to the transceiving control signal and the overcurrent detection signal.
When the first external terminal 100 is used as an input terminal, the first logic control unit 330 may control the first input switch unit 320 to be turned on and the first output switch unit 310 to be turned off according to the transceiving control signal. When the first external terminal 100 is used as an output terminal, the first logic control unit 330 may control the first output switch unit 310 to be turned on and the first input switch unit 320 to be turned off according to the transceiving control signal. So that switching of the first external connection 100 between the output and the input can be achieved.
In one embodiment, as shown in fig. 3, the first logic control unit 330 includes a first logic gate U2, a second logic gate U3, and a first inverter U1. The input end of the first inverter U1 is connected to the voltage detection module 600, the output end of the first inverter U1 is connected to the first input end of the first logic gate U2, the second input end of the first logic gate U2 is connected to the overcurrent detection module 700, the output end of the first logic gate U2 is connected to the controlled end of the first output switch unit 310, the first input end of the second logic gate U3 is connected to the input end of the first inverter U1, the second input end of the second logic gate U3 is connected to the second input end of the first logic gate U2, and the output end of the second logic gate U3 is connected to the controlled end of the first input switch unit 320.
The first logic gate U2 may be an and gate or other logic gates, and may be specifically set according to actual requirements, that is, according to specific situations of the voltage detection module 600 and the overcurrent detection module 700.
The first inverter U1 is configured to invert the level of the first input terminal of the first logic gate U2 and the level of the first input terminal of the second logic gate U3, so as to ensure that only one of the first output switching unit 310 and the first input switching unit 320 is turned on at any time.
In an embodiment, as shown in fig. 3, the first signal transceiving control module 300 includes a second output switch unit 410, a second input switch unit 420 and a second logic control unit 430. The first end of the second output switch unit 410 is connected to the first external terminal 100, the second end of the second output switch unit 410 is connected to the output terminal OUT of the signal processing module 500, the first end of the second input switch unit 420 is connected to the first external terminal 100, the second end of the second input switch unit 420 is connected to the input terminal IN of the signal processing module 500, and the second logic control unit 430 is connected to the controlled end of the second output switch unit 410, the controlled end of the second input switch unit 420, the voltage detection module 600, and the overcurrent detection module 700, respectively. The second logic control unit 430 is configured to control on and off of the second output switching unit 410 and the second input switching unit 420 according to the transceiving control signal and the overcurrent detection signal.
When the second external terminal 200 is used as an input terminal, the second logic control unit 430 may control the second input switch unit 420 to be turned on and the second output switch unit 410 to be turned off according to the transceiving control signal. When the second external terminal 200 is used as the output terminal, the second logic control unit 430 may control the second output switch unit 410 to be turned on and the second input switch unit 420 to be turned off according to the transceiving control signal. So that switching of the second external terminal 200 between the output terminal and the input terminal can be achieved.
In an embodiment, as shown in fig. 3, the second logic control unit 430 includes a third logic gate U6, a fourth logic gate U7, a second inverter U4 and a third inverter U5. The input end of the second inverter U4 is connected to the voltage detection module 600, the output end of the second inverter U4 is connected to the input end of the third inverter U5, the output end of the third inverter U5 is connected to the first input end of the third logic gate U6, the second input end of the third logic gate U6 is connected to the overcurrent detection module 700, the output end of the third logic gate U6 is connected to the controlled end of the second output switching unit 410, the first input end of the fourth logic gate U7 is connected to the input end of the third inverter U5, the second input end of the fourth logic gate U7 is connected to the second input end of the third logic gate U6, and the output end of the fourth logic gate U7 is connected to the controlled end of the second input switching unit 420.
The second inverter U4 is configured to make the level of the transceiving control signal received by the second logic control unit 430 opposite to the level of the transceiving control signal received by the first logic control unit 330, and in the case that other circuit structures of the second logic control unit 430 are similar to those of the first logic control unit 330, only one of the external terminals may be an input terminal and the other external terminal may be an output terminal through one transceiving control signal.
The third inverter U5 is configured to invert the level of the first input terminal of the third logic gate U6 and the level of the first input terminal of the fourth logic gate U7, so as to ensure that only one of the second output switching unit 410 and the second input switching unit 420 is turned on at any time.
Illustratively, the first, second, third, and fourth logic gates U2, U3, U6, and U7 may each be an and gate. When the first external terminal 100 receives the trigger signal, the signal processing module 500 may send high-level control signals to the first logic control unit 330 and the second logic control unit 430, and under the condition that the output current is normal, the over-current detection module 700 sends high-level over-current detection signals to the first logic control unit 330 and the second logic control unit 430 at the same time. Then in the first logic control unit 330, the second logic gate U3 will output a high level to drive the first input switch unit 320 to be turned on, the third logic gate U6 will output a high level to drive the second output switch unit 410 to be turned on, at this time, the first external terminal 100 will be configured as an input terminal for receiving signals, and the second external terminal 200 will be configured as an output terminal for outputting signals.
The first output switch unit 310, the first input switch unit 320, the second output switch unit 410, and the second input switch unit 420 may include MOS transistors or operational amplifiers. When the first output switching unit 310, the first input switching unit 320, the second output switching unit 410, and the second input switching unit 420 include operational amplifiers, the signals output by the respective logic gates are enable signals of the operational amplifiers, and the operational amplifiers are used as switches.
In one embodiment, as shown in fig. 4, the voltage detection module 600 includes a first voltage detection unit 610, a second voltage detection unit 620, and a priority processing unit 630. The first voltage detection unit 610 is connected to the first external terminal 100 and the priority processing unit 630, respectively, and the second voltage detection unit 620 is connected to the second external terminal 200 and the priority processing unit 630, respectively. The first voltage detecting unit 610 is configured to sample the voltage of the first external terminal 100, and send the sampling result to the priority processing unit 630. The second voltage detection unit 620 is configured to sample the voltage of the second external terminal 200 and transmit the sampling result to the priority processing unit 630. The priority processing unit 630 is configured to obtain the sequence in which the first external terminal 100 and the second external terminal 200 receive the trigger signals according to the received sampling result, and output corresponding transceiver control signals.
The levels of the first external terminal 100 and the second external terminal 200 are sampled by the first voltage detecting unit 610 and the second voltage detecting unit 620, respectively. The priority processing unit 630 may determine which external terminal has received the trigger signal first according to the sampling result, that is, may control the external terminal that has received the trigger signal first to be the input terminal, and control the other external terminal to be the output terminal. Note that, when the priority processing unit 630 completes detection of the trigger signal, the trigger signal of high level is no longer detected in the frame driving signal.
Fig. 5 shows a schematic diagram of an LED lighting device according to an embodiment of the present application, and for convenience of explanation, only the portions related to the embodiment are shown, which are described in detail below:
the LED lighting device 20 includes a control device 30, a plurality of LED lamps 40, and a plurality of LED driving chips 10 according to any one of the above embodiments, where each LED driving chip 10 is connected to and drives at least one of the LED lamps 40 to emit light, and the signal processing module of the LED driving chip 10 may directly or indirectly control the LED lamps 40 to emit light based on the received driving signal. The LED driving chips 10 are sequentially connected in series to form a cascade driving circuit, the control device 30 is respectively connected with two ends of the cascade driving circuit, the control device 30 is configured to send a first driving signal S1 and a second driving signal S2 to two ends of the cascade driving circuit, and the first driving signal S1 and the second driving signal S2 are used for configuring working parameters of the LED driving chips 10.
In the LED lighting device 20, the control device 30 may simultaneously transmit the first driving signal S1 and the second driving signal S2 from the front end and the rear end of the cascade driving circuit, and only half of the time of the conventional scheme is required to complete the configuration of each LED driving chip 10.
In an embodiment, the first driving signal and the second driving signal each include a plurality of sets of data, one set of data corresponds to one LED driving chip 10, and the arrangement order of the sets of data in the first driving signal is opposite to the arrangement order of the sets of data in the second driving signal.
The first driving signal S1 includes data D1, data D2, and data D3 … … data Dn sequentially arranged in order, each group of data corresponds to one LED driving chip 10, and when the first LED driving chip 10 receives the data D1, the subsequent data D2, the data D3 … … data Dn are sent to the next LED driving chip 10, and so on, so as to configure each LED driving chip 10 in the cascade driving circuit. The second driving signal S2 includes data Dn, data Dn-1, and data Dn-2 … … data D1 sequentially arranged in order, and each LED driving chip 10 is simultaneously configured from both ends of the cascade driving circuit, so that the configuration time can be shortened.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. An LED driving chip, comprising:
the first external connection end is used for being connected with an external circuit to send or receive driving signals;
a second external terminal for connecting with an external circuit to transmit or receive a driving signal;
the device comprises a first signal receiving and transmitting control module, a second signal receiving and transmitting control module and a signal processing module, wherein a first end of the first signal receiving and transmitting control module is connected with the first external end, a second end of the first signal receiving and transmitting control module is connected with the signal processing module, a first end of the second signal receiving and transmitting control module is connected with the second external end, and a second end of the second signal receiving and transmitting control module is connected with the signal processing module;
the voltage detection module is connected with the first external connection end and the second external connection end respectively, and is configured to output corresponding receiving and transmitting control signals according to the sequence of the trigger signals received by the first external connection end and the second external connection end; wherein the drive signal comprises the trigger signal;
the voltage detection module outputs the receiving and transmitting control signal to control the first signal receiving and transmitting control module to transmit the driving signal received from the first external terminal to the signal processing module under the condition that the first external terminal receives the trigger signal first, and controls the second signal receiving and transmitting control module to output the driving signal sent by the signal processing module from the second external terminal;
and the voltage detection module outputs the receiving and transmitting control signal to control the second signal receiving and transmitting control module to transmit the driving signal received from the second external terminal to the signal processing module under the condition that the second external terminal receives the trigger signal first, and controls the first signal receiving and transmitting control module to output the driving signal sent by the signal processing module from the first external terminal.
2. The LED driver chip of claim 1, further comprising an over-current detection module connected to the first and second external terminals and the first and second signal transceiver control modules, respectively;
the overcurrent detection module is configured to detect output currents of the first external connection terminal and the second external connection terminal, and send an overcurrent detection signal to the first signal transceiving control module when the output current of the first external connection terminal is greater than a preset threshold value, or send the overcurrent detection signal to the second signal transceiving control module when the output current of the second external connection terminal is greater than the preset threshold value;
the first signal receiving and transmitting control module and the second signal receiving and transmitting control module are further configured to stop transmitting the driving signal to the corresponding external terminal under the condition that the overcurrent detection signal is received.
3. The LED driving chip of claim 2, wherein the overcurrent detection module comprises a first overcurrent detection unit and a second overcurrent detection unit;
the first overcurrent detection unit is respectively connected with the first external connection end and the first signal receiving and transmitting control module, and is configured to send the overcurrent detection signal to the first signal receiving and transmitting control module under the condition that the output current of the first external connection end is larger than a preset threshold value;
the second overcurrent detection unit is respectively connected with the second external connection end and the second signal receiving and transmitting control module, and is configured to send the overcurrent detection signal to the second signal receiving and transmitting control module under the condition that the output current of the second external connection end is larger than a preset threshold value.
4. The LED driving chip of claim 2 or 3, wherein the first signal transceiving control module comprises a first output switching unit, a first input switching unit, and a first logic control unit;
the first end of the first output switch unit is connected with the first external connection end, the second end of the first output switch unit is connected with the output end of the signal processing module, the first end of the first input switch unit is connected with the first external connection end, the second end of the first input switch unit is connected with the input end of the signal processing module, and the first logic control unit is respectively connected with the controlled end of the first output switch unit, the controlled end of the first input switch unit, the voltage detection module and the overcurrent detection module;
the first logic control unit is configured to control on and off of the first output switch unit and the first input switch unit according to the transceiving control signal and the overcurrent detection signal.
5. The LED driving chip of claim 4, wherein the first logic control unit comprises a first logic gate, a second logic gate, and a first inverter;
the input end of the first inverter is connected with the voltage detection module, the output end of the first inverter is connected with the first input end of the first logic gate, the second input end of the first logic gate is connected with the overcurrent detection module, the output end of the first logic gate is connected with the controlled end of the first output switch unit, the first input end of the second logic gate is connected with the input end of the first inverter, the second input end of the second logic gate is connected with the second input end of the first logic gate, and the output end of the second logic gate is connected with the controlled end of the first input switch unit.
6. The LED driving chip of claim 2 or 3, wherein the first signal transceiving control module comprises a second output switching unit, a second input switching unit, and a second logic control unit;
the first end of the second output switch unit is connected with the first external connection end, the second end of the second output switch unit is connected with the output end of the signal processing module, the first end of the second input switch unit is connected with the first external connection end, the second end of the second input switch unit is connected with the input end of the signal processing module, and the second logic control unit is respectively connected with the controlled end of the second output switch unit, the controlled end of the second input switch unit, the voltage detection module and the overcurrent detection module;
the second logic control unit is configured to control on and off of the second output switch unit and the second input switch unit according to the transceiving control signal and the overcurrent detection signal.
7. The LED driving chip of claim 6, wherein the second logic control unit comprises a third logic gate, a fourth logic gate, a second inverter and a third inverter;
the input end of the second inverter is connected with the voltage detection module, the output end of the second inverter is connected with the input end of the third inverter, the output end of the third inverter is connected with the first input end of the third logic gate, the second input end of the third logic gate is connected with the overcurrent detection module, the output end of the third logic gate is connected with the controlled end of the second output switch unit, the first input end of the fourth logic gate is connected with the input end of the third inverter, the second input end of the fourth logic gate is connected with the second input end of the third logic gate, and the output end of the fourth logic gate is connected with the controlled end of the second input switch unit.
8. The LED driving chip of claim 1, wherein the voltage detection module comprises a first voltage detection unit, a second voltage detection unit, and a priority processing unit;
the first voltage detection unit is respectively connected with the first external connection end and the priority processing unit, and the second voltage detection unit is respectively connected with the second external connection end and the priority processing unit;
the first voltage detection unit is configured to sample the voltage of the first external terminal and send a sampling result to the priority processing unit; the second voltage detection unit is configured to sample the voltage of the second external terminal and send a sampling result to the priority processing unit; the priority processing unit is configured to obtain the sequence of the trigger signals received by the first external terminal and the second external terminal according to the received sampling result, and output the corresponding receiving and transmitting control signals.
9. An LED lighting device comprising a plurality of LED lamps, further comprising a control device and a plurality of LED driving chips according to any one of claims 1 to 8, each of the LED driving chips being connected to and driving at least one of the LED lamps to emit light, respectively;
the LED driving chips are sequentially connected in series to form a cascade driving circuit, the control device is respectively connected with two ends of the cascade driving circuit, the control device is configured to respectively send a first driving signal and a second driving signal to two ends of the cascade driving circuit, and the first driving signal and the second driving signal are used for configuring working parameters of the LED driving chips.
10. The LED lighting device of claim 9, wherein the first drive signal and the second drive signal each comprise a plurality of sets of data, one set of the data corresponding to one of the LED drive chips, the data of each set being arranged in the first drive signal in an order opposite to the data of each set being arranged in the second drive signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310584924.XA CN116390289B (en) | 2023-05-23 | 2023-05-23 | LED driving chip and LED lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310584924.XA CN116390289B (en) | 2023-05-23 | 2023-05-23 | LED driving chip and LED lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116390289A CN116390289A (en) | 2023-07-04 |
| CN116390289B true CN116390289B (en) | 2023-07-28 |
Family
ID=86975383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310584924.XA Active CN116390289B (en) | 2023-05-23 | 2023-05-23 | LED driving chip and LED lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116390289B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4824111A (en) * | 1985-09-09 | 1989-04-25 | T.R. Applied Development Corporation | Proportional control with an automatic centering manual input device for inputting computer variables |
| CN202760946U (en) * | 2012-06-20 | 2013-03-06 | 黄曙阶 | Christmas tree capable of displaying full-color patterns and animation |
| KR20130101611A (en) * | 2012-02-09 | 2013-09-16 | 단국대학교 산학협력단 | Apparatus, system and method for communicating data using light |
| WO2013189169A1 (en) * | 2012-06-20 | 2013-12-27 | Huang Shujie | Christmas tree displaying full color pattern and animation, and control method thereof |
| WO2015196893A1 (en) * | 2014-06-23 | 2015-12-30 | 深圳彩芯智科技有限公司 | Led lamp string control circuit and led lamp string controller |
| CN110312346A (en) * | 2019-07-25 | 2019-10-08 | 深圳市芯飞凌半导体有限公司 | LED drive chip and LED drive system |
| CN210443245U (en) * | 2019-08-12 | 2020-05-01 | 深圳市明微电子股份有限公司 | Display driving system based on multi-single-wire transmission and lighting equipment |
| CN210958875U (en) * | 2019-10-30 | 2020-07-07 | 杭州涂鸦信息技术有限公司 | Wireless intelligent control circuit for LED lighting tool and LED lighting tool |
| DE202020107459U1 (en) * | 2020-12-22 | 2021-03-24 | Shenzhen Nexnovo Technology Co., Ltd. | Driver chip, LED light and LED display screen |
| CN214277190U (en) * | 2021-01-29 | 2021-09-24 | 深圳锐盟半导体有限公司 | Piezoelectric sensing detection circuit and earphone |
| CN218768709U (en) * | 2022-12-07 | 2023-03-28 | 常州星宇车灯股份有限公司 | Multi-pixel control system capable of realizing high-speed communication by boards |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230020550A1 (en) * | 2020-11-11 | 2023-01-19 | Binyang Huang | Dual-line cascade application system and implementation method thereof for simultaneously supplying electrical power and transmitting data |
| CN114677954A (en) * | 2022-03-04 | 2022-06-28 | 富满微电子集团股份有限公司 | Signal selection circuit and LED drive chip |
| CN217278791U (en) * | 2022-03-25 | 2022-08-23 | 富满微电子集团股份有限公司 | Interface test circuit, chip and system |
-
2023
- 2023-05-23 CN CN202310584924.XA patent/CN116390289B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4824111A (en) * | 1985-09-09 | 1989-04-25 | T.R. Applied Development Corporation | Proportional control with an automatic centering manual input device for inputting computer variables |
| KR20130101611A (en) * | 2012-02-09 | 2013-09-16 | 단국대학교 산학협력단 | Apparatus, system and method for communicating data using light |
| CN202760946U (en) * | 2012-06-20 | 2013-03-06 | 黄曙阶 | Christmas tree capable of displaying full-color patterns and animation |
| WO2013189169A1 (en) * | 2012-06-20 | 2013-12-27 | Huang Shujie | Christmas tree displaying full color pattern and animation, and control method thereof |
| WO2015196893A1 (en) * | 2014-06-23 | 2015-12-30 | 深圳彩芯智科技有限公司 | Led lamp string control circuit and led lamp string controller |
| CN110312346A (en) * | 2019-07-25 | 2019-10-08 | 深圳市芯飞凌半导体有限公司 | LED drive chip and LED drive system |
| CN210443245U (en) * | 2019-08-12 | 2020-05-01 | 深圳市明微电子股份有限公司 | Display driving system based on multi-single-wire transmission and lighting equipment |
| CN210958875U (en) * | 2019-10-30 | 2020-07-07 | 杭州涂鸦信息技术有限公司 | Wireless intelligent control circuit for LED lighting tool and LED lighting tool |
| DE202020107459U1 (en) * | 2020-12-22 | 2021-03-24 | Shenzhen Nexnovo Technology Co., Ltd. | Driver chip, LED light and LED display screen |
| CN214277190U (en) * | 2021-01-29 | 2021-09-24 | 深圳锐盟半导体有限公司 | Piezoelectric sensing detection circuit and earphone |
| CN218768709U (en) * | 2022-12-07 | 2023-03-28 | 常州星宇车灯股份有限公司 | Multi-pixel control system capable of realizing high-speed communication by boards |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116390289A (en) | 2023-07-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102217415B (en) | Lighting system with a plurality of leds | |
| US7605547B2 (en) | Addressable LED architecture | |
| CN110718847B (en) | Multi-module optical fiber laser with function of monitoring abnormity of optical module in real time | |
| CN113795066B (en) | LED driving data transmission method and LED driving circuit | |
| KR20020041463A (en) | I2c opto-isolator circuit | |
| CN116390289B (en) | LED driving chip and LED lighting equipment | |
| CN101336028A (en) | Bidirectional daisy-chain cascades light network control method and system | |
| CN104270203A (en) | SFF double-light-emitting module with DDM function and optical communication system | |
| CN102348316A (en) | Switching system and method for operating at least one first and at least one second LED | |
| US20210119406A1 (en) | Multi-module fiber laser capable of monitoring abnormalities of optical modules in real time | |
| CN215007461U (en) | Handheld bidirectional transmission device, LED driving device and control system | |
| CN112885294B (en) | LED drive chip, drive circuit and display unit of dual signal source input | |
| WO2020252877A1 (en) | Micron light-emitting diode matrix display | |
| TW202326685A (en) | Scan-type display apparatus capable of short circuit detection, and data driver thereof | |
| CN102938963B (en) | Device and method for serial LED lamp fault detection and fault tolerance control | |
| CN219329835U (en) | Line lamp capable of serial-parallel communication conversion | |
| US11915662B2 (en) | Backlight module of display and lighting method thereof | |
| CN216700396U (en) | Polarity automatic adaptation decoding control panel and lighting system | |
| CN220528259U (en) | Parallel control chip, lighting equipment and lighting system | |
| TWI757794B (en) | Lamp group switching control device | |
| CN210444540U (en) | LED light-emitting circuit, running water lamp system and car lamp | |
| CN216391065U (en) | RS485 communication-based multi-path-to-one-path data routing device | |
| CN116723607B (en) | Signal line breakpoint continuous transmission one-in-two-out communication line | |
| CN211531400U (en) | Intelligent single-lamp bridging networking system | |
| CN216752164U (en) | System-cascaded LED driving data transmission circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |