WO2024197892A1 - Led驱动芯片及发光基板 - Google Patents

Led驱动芯片及发光基板 Download PDF

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Publication number
WO2024197892A1
WO2024197892A1 PCT/CN2023/085686 CN2023085686W WO2024197892A1 WO 2024197892 A1 WO2024197892 A1 WO 2024197892A1 CN 2023085686 W CN2023085686 W CN 2023085686W WO 2024197892 A1 WO2024197892 A1 WO 2024197892A1
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WIPO (PCT)
Prior art keywords
signal
level value
information
led driver
driver chip
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.)
Ceased
Application number
PCT/CN2023/085686
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English (en)
French (fr)
Inventor
刘金风
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Huizhou China Star Optoelectronics Display Co Ltd
Original Assignee
TCL China Star Optoelectronics Technology Co Ltd
Huizhou China Star Optoelectronics Display Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TCL China Star Optoelectronics Technology Co Ltd, Huizhou China Star Optoelectronics Display Co Ltd filed Critical TCL China Star Optoelectronics Technology Co Ltd
Priority to US18/284,327 priority Critical patent/US12499816B2/en
Publication of WO2024197892A1 publication Critical patent/WO2024197892A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264—Details of driving circuits
    • G09G2310/0297—Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns

Definitions

  • the present application relates to the field of display technology, and in particular to an LED driver chip and a light-emitting substrate.
  • Mini LED also known as “sub-millimeter light-emitting diode” refers to a display screen composed of LEDs with a grain (chip) size of 50 microns to 200 microns, which is between micro light-emitting diodes (Micro Light Emitting Diode, Micro LED) and small-pitch displays. Applications include Mini LED direct display and Mini LED backlight display. Since Mini LED display screens have outstanding performance in energy consumption, color gamut, contrast, HDR, flexibility, life, etc., and the process difficulty is not as great as Micro LED, it is relatively easy to produce finished products. Therefore, Mini LED is expected to become the leading product for upgrading LCD displays and compete with organic light-emitting diode displays in the consumer market.
  • LED driver chips In existing backlight products or direct display products, LED driver chips have a large number of pins due to their integrated functions and large number of channels, so the package size of the driver chip becomes larger, which in turn increases the process cost.
  • the present application provides an LED driver chip and a light-emitting substrate, which can reduce the number of pins on the LED driver chip, reduce the package size of the LED driver chip, and thus reduce the process cost.
  • an embodiment of the present application provides an LED driver chip, which includes a multiplexed pin, and the multiplexed pin is used to access a multiplexed signal, and the multiplexed signal includes at least two of power information, data information and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip.
  • the multiplexed signal includes the power information and the data information; wherein the operating voltage is between a high level value of the data signal and a low level value of the data signal.
  • the multiplexed signal includes the power supply information and the clock information; wherein the operating voltage is between a high level value of the clock signal and a low level value of the clock signal.
  • the multiplexed signal includes the data information and the clock information; wherein the high level value of the multiplexed signal and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the multiplexed signal includes the power information, the data information and the clock information; wherein the operating voltage is between the high level value of the data signal and the low level value of the data signal, and the high level value of the multiplexed signal and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the LED driver chip is connected to the multiplexed signal in a first time period and a second time period respectively, and in the first time period, the multiplexed signal includes the power information and the clock information, and the operating voltage is between the high level value of the clock signal and the low level value of the clock signal; in the second time period, the multiplexed signal includes the power information and the data information, and the operating voltage is between the high level value of the data signal and the low level value of the data signal, wherein the high level value of the data signal is equal to the high level value of the clock signal, and the low level value of the data signal is equal to the low level value of the clock signal.
  • the LED driver chip further includes a ground pin and an output pin, the ground pin is used to access a ground signal, and the output pin is used to output a low-level power signal.
  • the multiplexing pin, the ground pin and the output pin are all arranged at intervals on the same side of the LED driver chip.
  • the operating voltage is between 4 volts and 5.5 volts.
  • the present application provides a light-emitting substrate, including a substrate and an LED driver chip, wherein the LED driver chip is arranged on the substrate; the LED driver chip includes a multiplexing pin, and the multiplexing pin is used to access a multiplexing signal, and the multiplexing signal includes at least two of power information, data information and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip.
  • the multiplexed signal includes the power information and the data information; wherein the operating voltage is between a high level value of the data signal and a low level value of the data signal.
  • the multiplexed signal includes the power supply information and the clock information; wherein the operating voltage is between a high level value of the clock signal and a low level value of the clock signal.
  • the multiplexed signal includes the data information and the clock information; wherein the high level value of the multiplexed signal and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the multiplexed signal includes the power information, the data information and the clock information; wherein the operating voltage is between the high level value of the data signal and the low level value of the data signal, and the high level value of the multiplexed signal and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the LED driver chip is connected to the multiplexed signal in a first time period and a second time period respectively, and in the first time period, the multiplexed signal includes the power information and the clock information, and the operating voltage is between the high level value of the clock signal and the low level value of the clock signal; in the second time period, the multiplexed signal includes the power information and the data information, and the operating voltage is between the high level value of the data signal and the low level value of the data signal, wherein the high level value of the data signal is equal to the high level value of the clock signal, and the low level value of the data signal is equal to the low level value of the clock signal.
  • the LED driver chip further includes a ground pin and an output pin, the ground pin is used to access a ground signal, and the output pin is used to output a low-level power signal.
  • the multiplexing pin, the ground pin and the output pin are all arranged at intervals on the same side of the LED driver chip.
  • the operating voltage is between 4 volts and 5.5 volts.
  • the light-emitting substrate further includes a multiplexed signal line, the multiplexed pin is electrically connected to one end of the multiplexed signal line, and the multiplexed signal line is used to transmit the multiplexed signal.
  • the light-emitting substrate further includes a control module, and the control module is used to merge at least two of the operating voltage, the data information, and the clock information into a multiplexed signal, and control the output of the multiplexed signal.
  • the present application provides an LED driver chip and a light-emitting substrate, wherein the LED driver chip includes a multiplexing pin, wherein the multiplexing pin is used to access a multiplexing signal, wherein the multiplexing signal includes at least two of power information, data information, and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip.
  • the LED driver chip transmits at least two of the operating voltage, data signal, and clock signal using the multiplexing pin, thereby reducing the number of pins on the LED driver chip, reducing the package size of the LED driver chip, and thus reducing the process cost.
  • FIG1 is a schematic diagram of a first structure of an LED driver chip provided in an embodiment of the present application.
  • FIG2 is a first signal timing diagram provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a second structure of an LED driver chip provided in an embodiment of the present application.
  • FIG4 is a second signal timing diagram provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of a third structure of an LED driver chip provided in an embodiment of the present application.
  • FIG6 is a third signal timing diagram provided in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a fourth structure of an LED driver chip provided in an embodiment of the present application.
  • FIG8 is a fourth signal timing diagram provided in an embodiment of the present application.
  • FIG9 is a fifth signal timing diagram provided in an embodiment of the present application.
  • FIG10 is a fifth structural schematic diagram of an LED driver chip provided in an embodiment of the present application.
  • FIG. 11 is a schematic diagram of the structure of the light-emitting substrate provided in an embodiment of the present application.
  • the embodiments of the present application provide an LED driver chip and a light-emitting substrate, which can reduce the number of pins on the LED driver chip, reduce the package size of the LED driver chip, and thus reduce the process cost.
  • the following are detailed descriptions. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
  • the term “including” means “including but not limited to”.
  • the terms "first”, “second”, “third”, etc. are used only as labels to distinguish different objects, rather than to describe a specific order.
  • Figure 1 is a schematic diagram of the first structure of the LED driver chip provided in the embodiment of the present application
  • Figure 2 is a first signal timing diagram provided in the embodiment of the present application.
  • the embodiment of the present application provides an LED driver chip 100, which includes a multiplexing pin 10, and the multiplexing pin 10 is used to access a multiplexing signal, and the multiplexing signal includes at least two of power information, data information, and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip.
  • the LED driver chip 100 provided in the embodiment of the present application transmits at least two of the operating voltage, the data signal and the clock signal by using the multiplexed pin 10, thereby reducing the number of pins on the LED driver chip, reducing the package size of the LED driver chip, and thus reducing the process cost.
  • the LED driver chip further includes a ground pin 20 and an output pin 30, the ground pin 20 is used to access the ground signal, and the output pin 30 is used to output a low-level power signal.
  • FIG1 exemplarily shows that the LED driver chip includes 4 output pins 30 to respectively output low-level power signals.
  • the number of output pins 30 can be 1, 2, 3, 5, 6... etc. positive integers, which are not specifically limited in the present application.
  • the multiplexed signal SM includes power information and data information; wherein the working voltage is between the high level value of the data signal and the low level value of the data signal. That is, the data information is loaded on the working voltage, and the two are merged into a reset signal.
  • the working voltage corresponds to a high potential
  • the working voltage corresponds to a low potential.
  • the operating voltage is between 4 volts and 5.5 volts.
  • the operating voltage of the LED driver chip will have a maximum value and a minimum value, so as long as the operating voltage of the LED driver chip is within the range of the maximum value and the minimum value, the LED driver chip can continue to work normally.
  • the normal working range of the driver chip is 4 volts to 5.5 volts.
  • FIG. 2 exemplarily shows that the operating voltage varies between 4.5 volts and 5 volts, and the LED driver chip is powered normally.
  • data information can be added to the operating voltage, and the needs of power supply and communication can be met at the same time.
  • the existing data pin 50 and the power pin 60 are reused as a multiplexed pin 10, which effectively reduces the number of pins and the number of connecting wires, thereby achieving the purpose of reducing process costs.
  • the LED driver chip may further include a clock pin 40, which is used to receive a clock signal CK; alternatively, the clock pin 40 may not be required, and a person skilled in the art may pre-set and store the required clock information in the LED driver chip or other signal receiver, that is, a fixed clock signal CK is preset at the receiving end before sending data information, such as a 5 Hz square wave signal, and data information is collected according to the square wave signal.
  • a fixed clock signal CK is preset at the receiving end before sending data information, such as a 5 Hz square wave signal, and data information is collected according to the square wave signal.
  • data information adopts the binary system of 0101
  • the clock signal CK is at a high level
  • the state of the data signal is read at this time. If the data signal is at a high level, it is recorded as 1, and if the data signal is at a low level, it is recorded as 0. In this way, fast and efficient transmission of backlight brightness information can be achieved.
  • Figure 3 is a second structural schematic diagram of the LED driver chip provided in the embodiment of the present application
  • Figure 4 is a second signal timing diagram provided in the embodiment of the present application.
  • the embodiment of the present application provides an LED driver chip 200.
  • the difference between the LED driver chip 200 and the LED driver chip 100 is that the multiplexed signal in the LED driver chip 200 includes power supply information and clock information; wherein the operating voltage is between the high level value of the clock signal and the low level value of the clock signal.
  • the LED driver chip 200 includes a multiplexing pin 10, a data pin 50, a ground pin 20, and an output pin 30.
  • the multiplexing pin 10 is used to access a multiplexing signal, and the multiplexing signal includes power information and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip, and the clock signal is loaded on the operating voltage to form a multiplexing signal.
  • the data pin 50 is used to access data information, and the data information is used to provide a data signal to the LED driver chip; the ground pin 20 is used to access the ground signal, and the output pin 30 is used to output a low-level power signal.
  • FIG. 3 exemplarily shows that the LED driver chip includes 4 output pins 30 to output low-level power signals respectively.
  • the multiplexed signal SM includes power information and clock information; wherein the working voltage is between the high level value of the clock signal and the low level value of the clock signal, specifically, the working voltage is between 4 volts and 5.5 volts. That is, when the clock signal is at a high level, the working voltage corresponds to a high potential (5.5 volts), and when the clock signal is at a low level, the working voltage corresponds to a low potential (4.5 volts).
  • the multiplexed pin 10 is not only responsible for providing the working voltage for driving the LED driver chip to work normally, but also can transmit clock information to read the data information DATA according to the clock information.
  • the clock information is a signal of a preset frequency, such as a square wave signal of 5 Hz.
  • the data information DATA is collected according to the square wave signal.
  • the data information DATA adopts the binary system of 0101, when the clock signal is at a high level, the state of the data signal DATA is read at this time. If the data signal DATA is at a high level, it is recorded as 1, and if the data signal DATA is at a low level, it is recorded as 0. In this way, the backlight brightness information can be read and transmitted quickly and efficiently.
  • the LED driver chip 200 provided in the embodiment of the present application transmits the operating voltage and the clock signal by using the multiplexed pin 10, thereby reducing the number of pins on the LED driver chip, reducing the package size of the LED driver chip, and thus reducing the process cost.
  • Figure 5 is a third structural schematic diagram of the LED driver chip provided in the embodiment of the present application
  • Figure 6 is a third signal timing diagram provided in the embodiment of the present application.
  • the embodiment of the present application provides an LED driver chip 300.
  • the difference between the LED driver chip 300 and the LED driver chip 100 is that the multiplexed signal in the LED driver chip 300 includes data information and clock information; wherein the high level value of the multiplexed signal and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the high level value of the clock signal is equal to the high level value of the data signal
  • the low level value of the clock signal is equal to the low level value of the data signal.
  • the LED driver chip 300 includes a multiplexing pin 10, a power pin 60, a ground pin 20 and an output pin 30.
  • the multiplexing pin 10 is used to access a multiplexing signal, and the multiplexing signal includes data information and clock information; wherein the clock information is used to provide a clock signal to the LED driver chip, and the data information is used to provide a data signal to the LED driver chip.
  • the power pin 60 is used to access the power information, and the power information is used to provide the working voltage to the LED driver chip; the ground pin 20 is used to access the ground signal, and the output pin 30 is used to output a low-level power signal.
  • FIG. 5 exemplarily shows that the LED driver chip includes 4 output pins 30 to output low-level power signals respectively.
  • the multiplexed signal SM includes data information and clock information; wherein, the high level value of the multiplexed signal SM and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the high level value of the clock signal is equal to the high level value of the data signal
  • the low level value of the clock signal is equal to the low level value of the data signal
  • the operating voltage VCC is 5 volts.
  • the clock information is a signal of a preset frequency, such as a square wave signal of 5 Hz, and data information is collected according to the square wave signal.
  • the data information adopts the binary system of 0101
  • the clock signal is at a high level
  • the state of the data signal is read at this time, if the data signal is at a high level, it is recorded as 1, and if the data signal is at a low level, it is recorded as 0. In this way, fast and efficient reading and transmission of backlight brightness information can be achieved.
  • the LED driver chip 300 provided in the embodiment of the present application transmits data and clock signals by using the multiplexed pin 10, thereby reducing the number of pins on the LED driver chip, reducing the package size of the LED driver chip, and further reducing the process cost.
  • Figure 7 is a fourth structural schematic diagram of the LED driver chip provided in the embodiment of the present application
  • Figure 8 is a fourth signal timing diagram provided in the embodiment of the present application.
  • the embodiment of the present application provides an LED driver chip 400.
  • the difference between the LED driver chip 400 and the LED driver chip 100 is that the multiplexed signal includes power information, data information, and clock information; wherein the operating voltage is between the high level value of the data signal and the low level value of the data signal, and the high level value of the multiplexed signal and the low level value of the multiplexed signal are obtained according to the level value of the data signal and the level value of the clock signal.
  • the LED driver chip 400 includes a multiplexing pin 10, a ground pin 20 and an output pin 30.
  • the multiplexing pin 10 is used to access a multiplexing signal, and the multiplexing signal includes power information, data information and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip, and the data signal and the clock signal are loaded on the operating voltage to form a multiplexing signal.
  • the ground pin 20 is used to access the ground signal
  • the output pin 30 is used to output a low-level power signal.
  • FIG. 7 exemplarily shows that the LED driver chip includes 4 output pins 30 to output low-level power signals respectively.
  • the multiplexed signal SM includes power information, data information, and clock information; wherein the operating voltage is between the high level value of the data signal and the low level value of the clock signal, the high level value of the clock signal is equal to the high level value of the data signal, and the low level value of the clock signal is equal to the low level value of the data signal.
  • the operating voltage is between 4 volts and 5.5 volts. That is, when the data signal is at a high level, the operating voltage corresponds to a high potential (5.5 volts), and when the data signal is at a low level, the operating voltage corresponds to a low potential (4.5 volts).
  • the multiplexed pin 10 is not only responsible for providing the operating voltage for driving the LED driver chip to work normally, but also can transmit data information and clock information, and read the data information according to the clock information.
  • the clock information is a signal of a preset frequency, such as a 5 Hz square wave signal. Data information is collected based on the square wave signal.
  • the data information uses the binary system of 0101, when the clock signal is at a high level, the state of the data signal is read. If the data signal is at a high level, it is recorded as 1, and if the data signal is at a low level, it is recorded as 0. In this way, the backlight brightness information can be read and transmitted quickly and efficiently.
  • the LED driver chip 200 provided in the embodiment of the present application transmits the operating voltage, data signal and clock signal by using the multiplexed pin 10, thereby reducing the number of pins on the LED driver chip, reducing the package size of the LED driver chip, and thus reducing the process cost.
  • Figure 9 is a fifth signal timing diagram provided by an embodiment of the present application.
  • the LED driver chip is connected to the multiplexed signal SM in the first period and the second period respectively.
  • the multiplexed signal SM1 includes power information and clock information, and the operating voltage is between the high level value of the clock signal and the low level value of the clock signal;
  • the multiplexed signal SM2 includes power information and data information, and the operating voltage is between the high level value of the data signal and the low level value of the data signal, wherein the high level value of the data signal is equal to the high level value of the clock signal, and the low level value of the data signal is equal to the low level value of the clock signal.
  • the operating voltage is between 4 volts and 5.5 volts. That is, when the data signal or the clock signal is at a high level, the operating voltage corresponds to a high potential (5.5 volts), and when the data signal or the clock signal is at a low level, the operating voltage corresponds to a low potential (4.5 volts).
  • the multiplexed pin 10 is not only responsible for providing the operating voltage to drive the LED driver chip to work normally, but also can transmit data information and clock information in time-sharing, and read the data information according to the clock information.
  • the clock information is a signal of a preset frequency, such as a 5 Hz square wave signal. Data information is collected according to the square wave signal.
  • the data information adopts the binary system of 0101
  • the clock signal when the clock signal is at a high level, the state of the data signal is read at this time. If the data signal is at a high level, it is recorded as 1, and if the data signal is at a low level, it is recorded as 0. In this way, fast and efficient reading and transmission of backlight brightness information can be achieved.
  • FIG. 10 is a fifth structural schematic diagram of the LED driver chip provided in the embodiment of the present application.
  • the embodiment of the present application provides an LED driver chip 500, and the difference between the LED driver chip 500 and the LED driver chip 400 is that the reuse pin 10, the ground pin 20 and the output pin 30 are all arranged at intervals on the same side of the LED driver chip.
  • Such a setting is conducive to further reducing the package size of the LED driver chip, thereby reducing the process cost.
  • the LED driver chip 500 includes a multiplexing pin 10, a ground pin 20, and an output pin 30.
  • the multiplexing pin 10 is used to access a multiplexing signal, and the multiplexing signal includes power information, data information, and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip, and the data signal and the clock signal are loaded on the operating voltage to form a multiplexing signal.
  • the ground pin 20 is used to access the ground signal, and the output pin 30 is used to output a low-level power signal.
  • FIG. 10 exemplarily shows that the LED driver chip includes four output pins 30 to output low-level power signals respectively.
  • Figure 11 is a schematic diagram of the structure of the light-emitting substrate provided in an embodiment of the present application.
  • the present application provides a light-emitting substrate 600, which includes a substrate 610 and any of the above LED driver chips, and the LED driver chip is arranged on the substrate 610.
  • the LED driver chip 400 is taken as an example.
  • the light-emitting substrate 600 further includes a multiplexed signal line 620 , and the multiplexed pin 10 is electrically connected to one end of the multiplexed signal line 620 , and the multiplexed signal line 620 is used to transmit the multiplexed signal.
  • the light-emitting substrate 600 further includes a control module 630, which is used to merge at least two of the operating voltage, data information, and clock information into a multiplexed signal and control the output of the multiplexed signal.
  • a control module 630 which is used to merge at least two of the operating voltage, data information, and clock information into a multiplexed signal and control the output of the multiplexed signal.
  • the light-emitting substrate 600 further includes a grounding trace, one end of the grounding pin 20 is electrically connected to the grounding trace, and the other end of the grounding trace is grounded.
  • the light-emitting substrate 600 further includes a plurality of LED lamp groups 640.
  • FIG. 11 shows four lamp groups 640 as an example.
  • Each lamp group 640 includes at least two electrically connected light-emitting diodes D.
  • a person skilled in the art can adjust the number of lamp groups 640 and the number of light-emitting diodes D in the lamp groups 640 as needed, and the present application does not specifically limit this.
  • the cathodes of the light-emitting diodes D close to the LED driver chip in the plurality of LED lamp groups 640 are electrically connected to the corresponding output pins 30.
  • FIG. 11 shows four lamp groups 640 as an example.
  • Each lamp group 640 includes at least two electrically connected light-emitting diodes D.
  • the cathodes of the light-emitting diodes D close to the LED driver chip in the plurality of LED lamp groups 640 are electrically connected to the corresponding output pins 30.
  • the four LED lamp groups 640 are electrically connected to the four corresponding output pins 30 in a one-to-one correspondence; the anodes of the light-emitting diodes D far away from the LED driver chip in the plurality of LED lamp groups 640 are connected to the high-level power supply voltage VDD.
  • the anodes of the light-emitting diodes D far away from the LED driver chip in the plurality of LED lamp groups 640 can be electrically connected to different power supply lines respectively to control the plurality of LED lamp groups 640 to emit light separately, or the plurality of LED lamp groups 640 can be electrically connected to the same power supply line to be turned on and emit light at the same time.
  • the present application provides an LED driver chip and a light-emitting substrate.
  • the LED driver chip includes a multiplexing pin 10, and the multiplexing pin 10 is used to access a multiplexing signal.
  • the multiplexing signal includes at least two of power information, data information, and clock information; wherein the power information is used to provide an operating voltage to the LED driver chip, the data information is used to provide a data signal to the LED driver chip, and the clock information is used to provide a clock signal to the LED driver chip.
  • the LED driver chip transmits at least two of the operating voltage, data signal, and clock signal using the multiplexing pin 10, thereby reducing the number of pins on the LED driver chip, reducing the package size of the LED driver chip, and thus reducing the process cost.

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Abstract

本申请公开了一种LED驱动芯片及发光基板，该LED驱动芯片包括复用引脚，用于接入一复用信号，复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，电源信息用于向LED驱动芯片提供工作电压，数据信息用于向LED驱动芯片提供数据信号，时钟信息用于向LED驱动芯片提供时钟信号。能够减少LED驱动芯片上的引脚数量。

Description

LED驱动芯片及发光基板 技术领域
本申请涉及显示技术领域，具体涉及一种LED驱动芯片及发光基板。
 背景技术
迷你发光二极管(Mini Light Emitting Diode，Mini LED)又名“次毫米发光二极管”，指由晶粒(芯片)尺寸在50微米至200微米的LED构成的显示屏，介于微型发光二极管(MicroLightEmitting Diode，Micro LED)和小间距显示之间。应用方向包括Mini LED直显和Mini LED背光的显示屏。由于Mini LED显示屏在能耗、色域、对比度、HDR、柔性、寿命等方面都有较为出色的表现，工艺难度又没有Micro LED那么大，制作成品相对容易，因此Mini LED有望成为液晶显示器升级的主导产品，与有机发光二极管显示器在消费市场一较高下。
在现有的背光产品或直显产品中，LED驱动芯片因为集成的功能、通道数多，因此LED驱动芯片上的引脚数量较多，驱动芯片的封装尺寸变大，进而增加了工艺成本。
 技术问题
本申请提供一种LED驱动芯片及发光基板，能够减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
 技术解决方案
一方面，本申请实施例提供一种LED驱动芯片，该LED驱动芯片包括复用引脚，所述复用引脚用于接入一复用信号，所述复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，所述电源信息用于向所述LED驱动芯片提供工作电压，所述数据信息用于向所述LED驱动芯片提供数据信号，所述时钟信息用于向所述LED驱动芯片提供时钟信号。
可选地，在本申请的一些实施例中，所述复用信号包括所述电源信息以及所述数据信息；其中，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间。
可选地，在本申请的一些实施例中，所述复用信号包括所述电源信息以及所述时钟信息；其中，所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间。
可选地，在本申请的一些实施例中，所述复用信号包括所述数据信息以及所述时钟信息；其中，所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
可选地，在本申请的一些实施例中，所述复用信号包括所述电源信息、所述数据信息以及所述时钟信息；其中，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，且所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
可选地，在本申请的一些实施例中，所述LED驱动芯片在第一时段以及第二时段分别接入所述复用信号，在所述第一时段，所述复用信号包括所述电源信息以及所述时钟信息，所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间；在所述第二时段，所述复用信号包括电源信息以及所述数据信息，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，其中，所述数据信号的高电平值与所述时钟信号的高电平值相等，所述数据信号的低电平值与所述时钟信号的低电平值相等。
可选地，在本申请的一些实施例中，所述LED驱动芯片还包括接地引脚以及输出引脚，所述接地引脚用于接入接地信号，所述输出引脚用于输出低电平电源信号。
可选地，在本申请的一些实施例中，所述复用引脚、所述接地引脚以及所述输出引脚均间隔设置于所述LED驱动芯片的同一侧。
可选地，在本申请的一些实施例中，所述工作电压介于4伏至5.5伏之间。
另一方面，本申请提供一种发光基板，包括基板以及LED驱动芯片，所述LED驱动芯片设于所述基板上；所述LED驱动芯片包括复用引脚，所述复用引脚用于接入一复用信号，所述复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，所述电源信息用于向所述LED驱动芯片提供工作电压，所述数据信息用于向所述LED驱动芯片提供数据信号，所述时钟信息用于向所述LED驱动芯片提供时钟信号。
可选地，在本申请的一些实施例中，所述复用信号包括所述电源信息以及所述数据信息；其中，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间。
可选地，在本申请的一些实施例中，所述复用信号包括所述电源信息以及所述时钟信息；其中，所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间。
可选地，在本申请的一些实施例中，所述复用信号包括所述数据信息以及所述时钟信息；其中，所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
可选地，在本申请的一些实施例中，所述复用信号包括所述电源信息、所述数据信息以及所述时钟信息；其中，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，且所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
可选地，在本申请的一些实施例中，所述LED驱动芯片在第一时段以及第二时段分别接入所述复用信号，在所述第一时段，所述复用信号包括所述电源信息以及所述时钟信息，所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间；在所述第二时段，所述复用信号包括电源信息以及所述数据信息，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，其中，所述数据信号的高电平值与所述时钟信号的高电平值相等，所述数据信号的低电平值与所述时钟信号的低电平值相等。
可选地，在本申请的一些实施例中，所述LED驱动芯片还包括接地引脚以及输出引脚，所述接地引脚用于接入接地信号，所述输出引脚用于输出低电平电源信号。
可选地，在本申请的一些实施例中，所述复用引脚、所述接地引脚以及所述输出引脚均间隔设置于所述LED驱动芯片的同一侧。
可选地，在本申请的一些实施例中，所述工作电压介于4伏至5.5伏之间。
可选地，在本申请的一些实施例中，所述发光基板还包括复用信号走线，所述复用引脚与一所述复用信号走线的一端电连接，所述复用信号走线用于传输所述复用信号。
可选地，在本申请的一些实施例中，所述发光基板还包括控制模块，所述控制模块用于将所述工作电压、所述数据信息以及所述时钟信息的至少两者融合为复用信号，并控制所述复用信号的输出。
 有益效果
本申请提供一种LED驱动芯片及发光基板，该LED驱动芯片包括复用引脚，所述复用引脚用于接入一复用信号，所述复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，所述电源信息用于向所述LED驱动芯片提供工作电压，所述数据信息用于向所述LED驱动芯片提供数据信号，所述时钟信息用于向所述LED驱动芯片提供时钟信号。该LED驱动芯片通过使用复用引脚传输工作电压、数据信号以及时钟信号中的至少两者，从而减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本申请实施例提供的LED驱动芯片的第一种结构示意图；
图2是本申请实施例提供的第一种信号时序图；
图3是本申请实施例提供的LED驱动芯片的第二种结构示意图；
图4是本申请实施例提供的第二种信号时序图；
图5是本申请实施例提供的LED驱动芯片的第三种结构示意图；
图6是本申请实施例提供的第三种信号时序图；
图7是本申请实施例提供的LED驱动芯片的第四种结构示意图；
图8是本申请实施例提供的第四种信号时序图；
图9是本申请实施例提供的第五种信号时序图；
图10是本申请实施例提供的LED驱动芯片的第五种结构示意图；
图11是本申请实施例提供的发光基板结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例提供一种LED驱动芯片及发光基板，能够减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。以下分别进行详细说明。需说明的是，以下实施例的描述顺序不作为对实施例优选顺序的限定。另外，在本申请的描述中，术语“包括”是指“包括但不限于”。术语“第一”、“第二”、“第三”等仅仅作为标示使用，其用于区别不同对象，而不是用于描述特定顺序。
请参阅图1和图2，图1是本申请实施例提供的LED驱动芯片的第一种结构示意图；图2是本申请实施例提供的第一种信号时序图。如图1所示，本申请实施例提供一种LED驱动芯片100，该LED驱动芯片100包括复用引脚10，复用引脚10用于接入一复用信号，复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，电源信息用于向LED驱动芯片提供工作电压，数据信息用于向LED驱动芯片提供数据信号，时钟信息用于向LED驱动芯片提供时钟信号。
本申请实施例提供的LED驱动芯片100通过使用复用引脚10传输工作电压、数据信号以及时钟信号中的至少两者，从而减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
在本申请实施例中，LED驱动芯片还包括接地引脚20以及输出引脚30，接地引脚20用于接入接地信号，输出引脚30用于输出低电平电源信号。图1中示例性的示出LED驱动芯片包括4个输出引脚30，以分别输出低电平电源信号，具体地，本领域技术人员可根据实际需要调整输出引脚30的数量，输出引脚30的数量可以为1个，2个，3个，5个，6个......等正整数个，本申请在此不作具体限定。
在本申请实施例中，如图2所示，复用信号SM包括电源信息以及数据信息；其中，工作电压介于数据信号的高电平值与数据信号的低电平值之间。也即，将数据信息加载在工作电压上，二者融合为复位信号，当数据信号为高电平时工作电压对应为高电位，当数据信号为低电平时工作电压对应为低电位，这样的设计，使得复用引脚10不仅负责提供驱动LED驱动芯片正常工作的工作电压，同时可传输数据信息，以控制背光的亮度。
在本申请实施例中，工作电压介于4伏至5.5伏之间。通常LED驱动芯片的工作电压会存在最大值和最小值，故只要保证LED驱动芯片的工作电压在最大值和最小值的区间内即可使得LED驱动芯片能持续正常工作。优选地，驱动芯片的正常工作范围为4伏~5.5伏，图2中示例性的示出，工作电压在4.5伏~5伏之间变化，LED驱动芯片供电正常，同时可在工作电压中加入数据信息，可同时实现供电及通讯的需求，并将现有的数据引脚50和电源引脚60复用为一个复用引脚10，有效减少了引脚数量及连接走线的数量，达到降低工艺成本的目的。
在本申请实施例中，LED驱动芯片还可以包括时钟引脚40，时钟引脚40用于接收时钟信号CK；或者，也可以不需要设置时钟引脚40，本领域技术人员可将需要的时钟信息预先设定并存入LED驱动芯片或者其它信号接收器中，也即，在发送数据信息之前在接收端预设一个固定的时钟信号CK，例如5赫兹的方波信号，根据该方波信号采集数据信息，数据信息采用0101的二进制时，当时钟信号CK为高电平时，此时读取数据信号的状态，若数据信号为高电平即记作1，数据信号为低电平即记作0，通过这种方式可以实现快速、高效的传输背光亮度信息。
请参阅图3和图4，图3是本申请实施例提供的LED驱动芯片的第二种结构示意图；图4是本申请实施例提供的第二种信号时序图。如图3和图4所示，本申请实施例提供一种LED驱动芯片200，LED驱动芯片200与LED驱动芯片100的区别在于：LED驱动芯片200中复用信号包括电源信息以及时钟信息；其中，工作电压介于时钟信号的高电平值与时钟信号的低电平值之间。
具体地，LED驱动芯片200包括复用引脚10、数据引脚50、接地引脚20以及输出引脚30，复用引脚10用于接入一复用信号，复用信号包括电源信息以及时钟信息；其中，电源信息用于向LED驱动芯片提供工作电压，时钟信息用于向LED驱动芯片提供时钟信号，将时钟信号加载在工作电压上融合形成复用信号。数据引脚50用于接入数据信息，数据信息用于向LED驱动芯片提供数据信号；接地引脚20用于接入接地信号，输出引脚30用于输出低电平电源信号。图3中示例性的示出LED驱动芯片包括4个输出引脚30，以分别输出低电平电源信号。
在本申请实施例中，如图4所示，复用信号SM包括电源信息以及时钟信息；其中，工作电压介于时钟信号的高电平值与时钟信号的低电平值之间，具体地，工作电压介于4伏至5.5伏之间。也即，当时钟信号为高电平时工作电压对应为高电位（5.5伏），当时钟信号为低电平时工作电压对应为低电位（4.5伏），这样的设计，使得复用引脚10不仅负责提供驱动LED驱动芯片正常工作的工作电压，同时可传输时钟信息，以根据该时钟信息读取数据信息DATA。具体地，时钟信息为一个预设频率的信号，例如5赫兹的方波信号，根据该方波信号采集数据信息DATA，数据信息DATA采用0101的二进制时，当时钟信号为高电平时，此时读取数据信号DATA的状态，若数据信号DATA为高电平即记作1，数据信号DATA为低电平即记作0，通过这种方式可以实现快速、高效的读取和传输背光亮度信息。
本申请实施例提供的LED驱动芯片200通过使用复用引脚10传输工作电压以及时钟信号，从而减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
请参阅图5和图6，图5是本申请实施例提供的LED驱动芯片的第三种结构示意图；图6是本申请实施例提供的第三种信号时序图。如图5和图6所示，本申请实施例提供一种LED驱动芯片300，LED驱动芯片300与LED驱动芯片100的区别在于：LED驱动芯片300中复用信号包括数据信息以及时钟信息；其中，复用信号的高电平值以及复用信号的低电平值根据数据信号的电平值以及时钟信号的电平值得到。具体地，时钟信号的高电平值与数据信号的高电平值相等，时钟信号的低电平值与数据信号的低电平值相等。
具体地，LED驱动芯片300包括复用引脚10、电源引脚60、接地引脚20以及输出引脚30，复用引脚10用于接入一复用信号，复用信号包括数据信息以及时钟信息；其中，时钟信息用于向LED驱动芯片提供时钟信号，数据信息用于向LED驱动芯片提供数据信号。电源引脚60用于接入电源信息，电源信息用于向LED驱动芯片提供工作电压；接地引脚20用于接入接地信号，输出引脚30用于输出低电平电源信号。图5中示例性的示出LED驱动芯片包括4个输出引脚30，以分别输出低电平电源信号。
在本申请实施例中，如图6所示，复用信号SM包括数据信息以及时钟信息；其中，复用信号SM的高电平值以及复用信号的低电平值根据数据信号的电平值以及时钟信号的电平值得到。具体地，时钟信号的高电平值与数据信号的高电平值相等，时钟信号的低电平值与数据信号的低电平值相等，工作电压VCC为5伏。这样的设计，使得复用引脚10不仅负责提供数据信息，同时可传输时钟信息，以根据该时钟信息读取数据信息。具体地，时钟信息为一个预设频率的信号，例如5赫兹的方波信号，根据该方波信号采集数据信息，数据信息采用0101的二进制时，当时钟信号为高电平时，此时读取数据信号的状态，若数据信号为高电平即记作1，数据信号为低电平即记作0，通过这种方式可以实现快速、高效的读取和传输背光亮度信息。
本申请实施例提供的LED驱动芯片300通过使用复用引脚10传输数据以及时钟信号，从而减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
请参阅图7和图8，图7是本申请实施例提供的LED驱动芯片的第四种结构示意图；图8是本申请实施例提供的第四种信号时序图。如图7和图8所示，本申请实施例提供一种LED驱动芯片400，LED驱动芯片400与LED驱动芯片100的区别在于：复用信号包括电源信息、数据信息以及时钟信息；其中，工作电压介于数据信号的高电平值与数据信号的低电平值之间，且复用信号的高电平值以及复用信号的低电平值根据数据信号的电平值以及时钟信号的电平值得到。
具体地，LED驱动芯片400包括复用引脚10、接地引脚20以及输出引脚30，复用引脚10用于接入一复用信号，复用信号包括电源信息、数据信息以及时钟信息；其中，电源信息用于向LED驱动芯片提供工作电压，数据信息用于向LED驱动芯片提供数据信号，时钟信息用于向LED驱动芯片提供时钟信号，将数据信号、时钟信号加载在工作电压上融合形成复用信号。接地引脚20用于接入接地信号，输出引脚30用于输出低电平电源信号。图7中示例性的示出LED驱动芯片包括4个输出引脚30，以分别输出低电平电源信号。
在本申请实施例中，如图8所示，复用信号SM包括电源信息、数据信息以及时钟信息；其中，工作电压介于数据信号的高电平值与时钟信号的低电平值之间，时钟信号的高电平值与数据信号的高电平值相等，时钟信号的低电平值与数据信号的低电平值相等。具体地，工作电压介于4伏至5.5伏之间。也即，当数据信号为高电平时工作电压对应为高电位（5.5伏），当数据信号为低电平时工作电压对应为低电位（4.5伏），这样的设计，使得复用引脚10不仅负责提供驱动LED驱动芯片正常工作的工作电压，同时可传输数据信息以及时钟信息，并根据该时钟信息读取数据信息。具体地，时钟信息为一个预设频率的信号，例如5赫兹的方波信号，根据该方波信号采集数据信息，数据信息采用0101的二进制时，当时钟信号为高电平时，此时读取数据信号的状态，若数据信号为高电平即记作1，数据信号为低电平即记作0，通过这种方式可以实现快速、高效的读取和传输背光亮度信息。
本申请实施例提供的LED驱动芯片200通过使用复用引脚10传输工作电压、数据信号以及时钟信号，从而减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
请参阅图9，图9是本申请实施例提供的第五种信号时序图。如图9所示，LED驱动芯片在第一时段以及第二时段分别接入复用信号SM，在第一时段，复用信号SM1包括电源信息以及时钟信息，工作电压介于时钟信号的高电平值与时钟信号的低电平值之间；在第二时段，复用信号SM2包括电源信息以及数据信息，工作电压介于数据信号的高电平值与数据信号的低电平值之间，其中，数据信号的高电平值与时钟信号的高电平值相等，数据信号的低电平值与时钟信号的低电平值相等。
具体地，工作电压介于4伏至5.5伏之间。也即，当数据信号或时钟信号为高电平时工作电压对应为高电位（5.5伏），当数据信号或时钟信号为低电平时工作电压对应为低电位（4.5伏），这样的设计，使得复用引脚10不仅负责提供驱动LED驱动芯片正常工作的工作电压，还可以分时传输数据信息以及时钟信息，并根据该时钟信息读取数据信息。具体地，时钟信息为一个预设频率的信号，例如5赫兹的方波信号，根据该方波信号采集数据信息，数据信息采用0101的二进制时，当时钟信号为高电平时，此时读取数据信号的状态，若数据信号为高电平即记作1，数据信号为低电平即记作0，通过这种方式可以实现快速、高效的读取和传输背光亮度信息。
请参阅图10，图10是本申请实施例提供的LED驱动芯片的第五种结构示意图。如图10所示，本申请实施例提供一种LED驱动芯片500，LED驱动芯片500与LED驱动芯片400的区别在于：复用引脚10、接地引脚20以及输出引脚30均间隔设置于LED驱动芯片的同一侧。这样的设置，有利于进一步减少减小LED驱动芯片的封装尺寸，进而降低工艺成本。
具体地，LED驱动芯片500包括复用引脚10、接地引脚20以及输出引脚30，复用引脚10用于接入一复用信号，复用信号包括电源信息、数据信息以及时钟信息；其中，电源信息用于向LED驱动芯片提供工作电压，数据信息用于向LED驱动芯片提供数据信号，时钟信息用于向LED驱动芯片提供时钟信号，将数据信号、时钟信号加载在工作电压上融合形成复用信号。接地引脚20用于接入接地信号，输出引脚30用于输出低电平电源信号。图10中示例性的示出LED驱动芯片包括4个输出引脚30，以分别输出低电平电源信号。
请参阅图11，图11是本申请实施例提供的发光基板结构示意图。如图11所示，本申请提供一种发光基板600，发光基板600包括基板610以及如上任一种LED驱动芯片，LED驱动芯片设于基板610上，图11中以LED驱动芯片400为例。
在本申请实施例中，发光基板600还包括复用信号走线620，复用引脚10与一复用信号走线620的一端电连接，复用信号走线620用于传输复用信号。
在本申请实施例中，发光基板600还包括控制模块630，控制模块630用于将工作电压、数据信息以及时钟信息的至少两者融合为复用信号，并控制复用信号的输出。
在本申请实施例中，发光基板600还包括接地走线，接地引脚20的一端与接地走线电连接，接地走线的另一端接地。
在本申请实施例中，发光基板600还包括多个LED灯组640，图11中示例性的示出4个灯组640，每个灯组640包括至少两个电连接的发光二极管D，本领域技术人员可以根据需要调整灯组640的数量以及灯组640中发光二极管D的数量，本申请在此不作具体限定。具体地，多个LED灯组640中靠近LED驱动芯片的发光二极管D的阴极与对应的输出引脚30电连接，图11中4个LED灯组640与4个对应的输出引脚30一一对应电连接；多个LED灯组640中远离LED驱动芯片的发光二极管D的阳极接入高电平电源电压VDD，具体地，多个LED灯组640中远离LED驱动芯片的发光二极管D的阳极可以分别与不同的电源走线电连接，以控制多个LED灯组640分别发光，也可以多个LED灯组640与同一电源走线电连接，以同时导通同时发光。
本申请提供一种LED驱动芯片及发光基板，该LED驱动芯片包括复用引脚10，复用引脚10用于接入一复用信号，复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，电源信息用于向LED驱动芯片提供工作电压，数据信息用于向LED驱动芯片提供数据信号，时钟信息用于向LED驱动芯片提供时钟信号。该LED驱动芯片通过使用复用引脚10传输工作电压、数据信号以及时钟信号中的至少两者，从而减少LED驱动芯片上的引脚数量，减小LED驱动芯片的封装尺寸，进而降低工艺成本。
以上对本申请实施例所提供的一种LED驱动芯片及发光基板进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种LED驱动芯片，其中，所述LED驱动芯片包括复用引脚，所述复用引脚用于接入一复用信号，所述复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，
    所述电源信息用于向所述LED驱动芯片提供工作电压，所述数据信息用于向所述LED驱动芯片提供数据信号，所述时钟信息用于向所述LED驱动芯片提供时钟信号。
  2. 根据权利要求1所述的LED驱动芯片，其中，所述复用信号包括所述电源信息以及所述数据信息；其中，
    所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间。
  3. 根据权利要求1所述的LED驱动芯片，其中，所述复用信号包括所述电源信息以及所述时钟信息；其中，
    所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间。
  4. 根据权利要求1所述的LED驱动芯片，其中，所述复用信号包括所述数据信息以及所述时钟信息；其中，
    所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
  5. 根据权利要求1所述的LED驱动芯片，其中，所述复用信号包括所述电源信息、所述数据信息以及所述时钟信息；其中，
    所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，且所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
  6. 根据权利要求1所述的LED驱动芯片，其中，所述LED驱动芯片在第一时段以及第二时段分别接入所述复用信号，
    在所述第一时段，所述复用信号包括所述电源信息以及所述时钟信息，所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间；
    在所述第二时段，所述复用信号包括电源信息以及所述数据信息，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，其中，所述数据信号的高电平值与所述时钟信号的高电平值相等，所述数据信号的低电平值与所述时钟信号的低电平值相等。
  7. 根据权利要求1所述的LED驱动芯片，其中，所述LED驱动芯片还包括接地引脚以及输出引脚，所述接地引脚用于接入接地信号，所述输出引脚用于输出低电平电源信号。
  8. 根据权利要求7所述的LED驱动芯片，其中，所述复用引脚、所述接地引脚以及所述输出引脚均间隔设置于所述LED驱动芯片的同一侧。
  9. 根据权利要求1所述的LED驱动芯片，其中，所述工作电压介于4伏至5.5伏之间。
  10. 一种发光基板，其中，包括基板以及LED驱动芯片，所述LED驱动芯片设于所述基板上；所述LED驱动芯片包括复用引脚，所述复用引脚用于接入一复用信号，所述复用信号包括电源信息、数据信息以及时钟信息中的至少两者；其中，
    所述电源信息用于向所述LED驱动芯片提供工作电压，所述数据信息用于向所述LED驱动芯片提供数据信号，所述时钟信息用于向所述LED驱动芯片提供时钟信号。
  11. 根据权利要求10所述的发光基板，其中，所述复用信号包括所述电源信息以及所述数据信息；其中，
    所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间。
  12. 根据权利要求10所述的发光基板，其中，所述复用信号包括所述电源信息以及所述时钟信息；其中，
    所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间。
  13. 根据权利要求10所述的发光基板，其中，所述复用信号包括所述数据信息以及所述时钟信息；其中，
    所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
  14. 根据权利要求10所述的发光基板，其中，所述复用信号包括所述电源信息、所述数据信息以及所述时钟信息；其中，
    所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，且所述复用信号的高电平值以及所述复用信号的低电平值根据所述数据信号的电平值以及所述时钟信号的电平值得到。
  15. 根据权利要求10所述的发光基板，其中，所述LED驱动芯片在第一时段以及第二时段分别接入所述复用信号，
    在所述第一时段，所述复用信号包括所述电源信息以及所述时钟信息，所述工作电压介于所述时钟信号的高电平值与所述时钟信号的低电平值之间；
    在所述第二时段，所述复用信号包括电源信息以及所述数据信息，所述工作电压介于所述数据信号的高电平值与所述数据信号的低电平值之间，其中，所述数据信号的高电平值与所述时钟信号的高电平值相等，所述数据信号的低电平值与所述时钟信号的低电平值相等。
  16. 根据权利要求10所述的发光基板，其中，所述LED驱动芯片还包括接地引脚以及输出引脚，所述接地引脚用于接入接地信号，所述输出引脚用于输出低电平电源信号。
  17. 根据权利要求16所述的发光基板，其中，所述复用引脚、所述接地引脚以及所述输出引脚均间隔设置于所述LED驱动芯片的同一侧。
  18. 根据权利要求10所述的发光基板，其中，所述工作电压介于4伏至5.5伏之间。
  19. 根据权利要求10所述的发光基板，其中，所述发光基板还包括复用信号走线，所述复用引脚与一所述复用信号走线的一端电连接，所述复用信号走线用于传输所述复用信号。
  20. 根据权利要求10所述的发光基板，其中，所述发光基板还包括控制模块，所述控制模块用于将所述工作电压、所述数据信息以及所述时钟信息的至少两者融合为复用信号，并控制所述复用信号的输出。
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