CN111369951A - Backlight module and display device - Google Patents
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- CN111369951A CN111369951A CN202010273518.8A CN202010273518A CN111369951A CN 111369951 A CN111369951 A CN 111369951A CN 202010273518 A CN202010273518 A CN 202010273518A CN 111369951 A CN111369951 A CN 111369951A
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- 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
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Abstract
The embodiment of the application provides a backlight module and a display device, the backlight module comprises a light-emitting unit, a driving board and a system-on-chip, the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, the other end of the luminous driving chip is connected with the micro control unit, the system level chip is connected with the micro control unit through a first serial peripheral bus, wherein, the first serial peripheral bus is connected with a filter circuit in series, the filter circuit is connected with the first serial peripheral bus in series, make filter circuit can filter the interference signal in the first serial peripheral bus, guarantee first serial peripheral bus signal's stability, solved current display screen and had SPI to walk the line and easily receive the interference, lead to signal distortion, cause the technical problem that the display frame made mistakes.
Description
Technical Field
The application relates to the technical field of display, in particular to a backlight module and a display device.
Background
In the existing display screen, a local backlight adjusting technology controlled by SOC (System On Chip) is adopted to control backlight, as shown in fig. 1, the display screen includes a set top box/personal computer, SOC, MCU (MicrocontrollerUnit), LED Driver IC (light emitting diode Driver Chip) and LED lamp panel, in the connection of each module, SPI (serial peripheral interface) is adopted to connect SOC and MCU, as shown in fig. 2, the distance between the existing SOC and MCU is far, and the SOC and MCU are connected by SPI traces, but this connection mode can cause SPI to be affected due to long trace distance, thereby causing signal waveform distortion and causing display picture error.
Therefore, the SPI wiring of the existing display screen is easily interfered, signal distortion is caused, and the technical problem of error of a display picture is caused.
Disclosure of Invention
The embodiment of the application provides a backlight unit and a display device for it has SPI to walk the line and receive the interference easily to solve current display screen, leads to the signal distortion, causes the technical problem that the display frame makes mistakes.
The embodiment of the application provides a backlight unit, this backlight unit includes:
a light emitting unit;
the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, and the other end of the light-emitting driving chip is connected with the micro control unit;
the system-level chip is connected with the micro control unit through a first serial peripheral bus;
and the first serial peripheral bus is connected with a filter circuit in series.
In some embodiments, the filter circuit includes a first-order filter circuit, the first-order filter circuit includes a resistor and a capacitor, one end of the resistor is connected to the system-on-chip, the other end of the resistor is connected to the capacitor, the other end of the resistor is connected to the micro control unit, and the other end of the capacitor is grounded.
In some embodiments, the resistor has a resistance in a range of 50 ohms to 200 ohms, and the capacitor has a size in a range of 5 picofarads to 20 picofarads.
In some embodiments, the first serial peripheral bus comprises a serial peripheral clock signal line, a serial peripheral data output signal line, a serial peripheral chip select signal line, at least one of the serial peripheral clock signal line, the serial peripheral data output signal line, and the serial peripheral chip select signal line being in series with the filter circuit.
In some embodiments, a first filter circuit is connected in series on the serial peripheral clock signal line.
In some embodiments, a second filter circuit is connected in series to the serial peripheral data output signal line.
In some embodiments, a third filter circuit is connected in series on the serial peripheral chip select signal line.
In some embodiments, the first filter circuit, the second filter circuit, and the third filter circuit are the same.
In some embodiments, the light emitting driving chips and the micro control units are connected by a second serial peripheral bus, the driving boards include a first driving board and a second driving board, the first driving board includes a first light emitting driving chip and a first micro control unit, the second driving board includes a second light emitting driving chip and a second micro control unit, the first serial peripheral bus includes a first sub-serial peripheral bus and a second sub-serial peripheral bus, the system level chip is connected with the first micro control unit by the first sub-serial peripheral bus, the system level chip is connected with the second micro control unit by the second sub-serial peripheral bus, the second serial peripheral bus includes a third sub-serial peripheral bus and a fourth sub-serial peripheral bus, the first micro control unit is connected with the first light emitting driving chip by the third sub-serial peripheral bus, the second micro control unit is connected with the second light-emitting driving chip through a fourth sub-serial peripheral bus, and a filter circuit is connected in series on the second serial peripheral bus.
Simultaneously, this application provides a display device, and this display device includes display panel and backlight unit, display panel passes through high definition multimedia interface and is connected with backlight unit, backlight unit includes:
a light emitting unit;
the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, and the other end of the light-emitting driving chip is connected with the micro control unit;
the system-level chip is connected with the micro control unit through a first serial peripheral bus;
and the first serial peripheral bus is connected with a filter circuit in series.
Has the advantages that: the embodiment of the application provides a backlight module and a display device, the backlight module comprises a light-emitting unit, a driving board and a system-on-chip, the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, the other end of the luminous driving chip is connected with the micro control unit, the system level chip is connected with the micro control unit through a first serial peripheral bus, wherein, the first serial peripheral bus is connected with a filter circuit in series, the filter circuit is connected with the first serial peripheral bus in series, make filter circuit can filter the interference signal in the first serial peripheral bus, guarantee first serial peripheral bus signal's stability, solved current display screen and had SPI to walk the line and easily receive the interference, lead to signal distortion, cause the technical problem that the display frame made mistakes.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of a conventional display screen.
Fig. 2 is a schematic diagram of a conventional SOC and MCU connection.
Fig. 3 is a schematic view of a backlight module according to an embodiment of the present disclosure.
Fig. 4 is a first schematic diagram of connection between an SOC and an MCU provided in the embodiment of the present application.
Fig. 5 is a second schematic diagram of connection between an SOC and an MCU according to an embodiment of the present application.
Fig. 6 is a comparison diagram of a waveform diagram of a serial peripheral clock signal line in a conventional display screen and a waveform diagram of a serial peripheral clock signal line in a backlight module according to an embodiment of the present application.
Fig. 7 is a schematic view of a display device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.
This application embodiment has the SPI to walk the line to receive the interference easily to current display screen, leads to signal distortion, causes the technical problem that display screen made mistakes, and this application embodiment is used for solving this problem.
The existing display screen can be divided into 1000 to 2000 areas, and one BLU Driver Board (backlight module Driver Board) can only drive less than 1000 areas, so two BLU Driver boards are needed to drive the LED lamps of the left and right half-screens respectively, as shown in fig. 1, the existing display screen includes a backlight module 11 and a set-top box/PC 12, the backlight module 11 includes a right LED lamp panel 111, a right Driver Board 112, a system level chip 113, a left Driver Board 114, a left LED lamp panel 115, the right Driver Board 112 includes an IC2 (second light emitting Driver chip) 1121 and an MCU2 (second micro control unit) 1122, and the left Driver Board 114 includes an IC1 (first light emitting Driver chip) 1141 and an MCU1 (first micro control unit) 1142.
As shown in fig. 1, a conventional set top box/PC (personal computer) sends image data to an SOC through an HDMI (high definition multimedia interface), the SOC processes the image data, and then sends backlight driving data of a left half screen to an MCU1 in real time through an SPI1(SPI, serial peripheral interface), and simultaneously sends backlight driving data of a right half screen to an MCU2 in real time through the SPI2, and the MCU is then located to an LED Driver IC where a partition is located through the SPI3 (or the SPI 4).
However, in the display screen, as shown in fig. 2, SOC21 is connected with MCU22 through SPI BUS (serial peripheral BUS), and the distance between SOC and MCU is longer, leads to SPI BUS longer, thereby makes SPI BUS receive the interference easily, leads to signal distortion, causes the display screen to make mistakes, and there is SPI to walk the line and receive the interference easily promptly in current display screen, leads to signal distortion, causes the technical problem that the display screen made mistakes.
As shown in fig. 3, an embodiment of the present application provides a backlight module 30, which includes:
a light emitting unit 31;
the driving board 32 comprises a light-emitting driving chip 33 and a micro control unit 34, one end of the light-emitting driving chip 33 is connected with the light-emitting unit 31, and the other end of the light-emitting driving chip 33 is connected with the micro control unit 34;
a system-on-chip 35, wherein the system-on-chip 35 is connected with the micro control unit 34 through a first serial peripheral bus 37;
the filter circuit 36 is connected in series to the first serial peripheral bus 37.
The embodiment of the application provides a backlight unit, this backlight unit includes luminescence unit, drive plate and system level chip, the drive plate includes luminescence driver chip and little the control unit, luminescence driver chip one end with luminescence unit connects, the luminescence driver chip other end with little the control unit connects, system level chip with little the control unit passes through a serial peripheral bus connection, wherein, it has filter circuit to establish ties on the first serial peripheral bus, through series connection filter circuit on first serial peripheral bus for filter circuit can filter the interfering signal in the first serial peripheral bus, guarantees the stability of first serial peripheral bus signal, has solved current display screen and has had SPI to walk the line and receive the interference easily, leads to the signal distortion, causes the technical problem that the display frame makes mistakes.
In an embodiment, as shown in fig. 4, the filter circuit 36 includes a first-order filter circuit, the first-order filter circuit includes a resistor 361 and a capacitor 362, one end of the resistor 361 is connected to the soc 35, the other end of the resistor 361 is connected to the capacitor 362, the other end of the resistor 361 is connected to the mcu 34, the other end of the capacitor 362 is grounded 41, in the filter circuit, the first-order filter circuit is used to filter signals, and considering that the frequency of the first serial peripheral bus is low (generally 1MHz to 5MHz), and the frequency of the interference signal on the driving board is generally 100MHz, the first-order filter circuit can be set, so that the interference signal is filtered out, and the signal of the first serial peripheral bus is retained, so that the transmitted signal is stable, and the signal is not distorted, and the display panel normally displays.
In one embodiment, the resistance range of the resistor is 50 ohms to 200 ohms, the size range of the capacitor is 5 picofarads to 20 picofarads, when the filter circuit is used, the resistance range of the control resistor is 50 ohms to 200 ohms, and the size of the control capacitor is 5 picofarads to 20 picofarads, so that signals can be better filtered, the signals are not distorted, and the display effect is better.
In one embodiment, as shown in fig. 5, the first serial peripheral bus 37 includes a serial peripheral clock signal line 373, a serial peripheral data output signal line 374, and a serial peripheral chip select signal line 375, at least one of the serial peripheral clock signal line 373, the serial peripheral data output signal line 374, and the serial peripheral chip select signal line 375 is connected in series with the filter circuit 36, and in the first serial peripheral bus, the serial peripheral clock signal line, the serial peripheral data output signal line, and the serial peripheral chip select signal line include a filter circuit in series on any one signal line, so that the filter circuit filters signals on the signal lines, and ensures stability of the signals.
In an embodiment, the serial peripheral clock signal line is connected in series with a first filter circuit, and the first filter circuit can be a first-order filter circuit by connecting the first filter circuit in series on the serial peripheral clock signal line, so as to filter an interference signal on the serial peripheral clock signal line, ensure the stability of a signal on the serial peripheral clock signal line, avoid the distortion of the signal on the serial peripheral clock signal line, and ensure the normal display of the display panel.
In an embodiment, the serial peripheral data output signal line is connected in series with a second filter circuit, the second filter circuit can be connected in series with the serial peripheral data output signal line, and the second filter circuit can be a first-order filter circuit, so as to filter an interference signal on the serial peripheral data output signal line, ensure the stability of the serial peripheral data output signal, avoid the distortion of the serial peripheral data output signal line, and enable the display to be normal.
In one embodiment, the serial peripheral chip select signal line is connected in series with a third filter circuit, and the third filter circuit may be a first-order filter circuit, so that the third filter circuit filters an interference signal on the serial peripheral chip select signal line, thereby stabilizing the serial peripheral chip select signal, and the serial peripheral chip select signal is not distorted, so that the display is normal.
In an embodiment, the first filter circuit, the second filter circuit, and the third filter circuit are the same, and as shown in fig. 4, the same filter circuits may be connected in series to the serial peripheral clock signal line, the serial peripheral data output signal line, and the serial peripheral chip select signal line, so that the filter circuits filter the interference signals on the serial peripheral bus, thereby ensuring that the signals on the serial peripheral bus are stable, the signals on the serial peripheral bus are not distorted, and the display is normal.
In one embodiment, as shown in fig. 3, the light emitting driving chip 33 and the micro control unit 34 are connected through a second serial peripheral bus 38, the driving board 32 includes a first driving board 321 and a second driving board 322, the first driving board 321 includes a first light emitting driving chip (IC1)331 and a first micro control unit (MCU1)341, the second driving board 322 includes a second light emitting driving chip (IC2)332 and a second micro control unit (MCU2)342, the first serial peripheral bus 37 includes a first sub-serial peripheral bus 371 and a second serial peripheral bus 372, the system-level chip 35 is connected with the first micro control unit 341 through the first sub-serial peripheral bus 371, the system-level chip 35 is connected with the second micro control unit 342 through the second sub-serial peripheral bus 372, the second serial bus 38 includes a third sub-serial peripheral bus 381 and a fourth sub-serial peripheral bus 382, the first micro control unit 341 is connected to the first light-emitting driving chip 331 through a third sub-serial peripheral bus 381, the second micro control unit 342 is connected to the second light-emitting driving chip 332 through a fourth sub-serial peripheral bus 382, and a filter circuit is connected to the second serial peripheral bus in series; in the connection between the light-emitting driving chip and the micro control unit, the second serial peripheral bus is connected with the filter circuit in series, so that signals on the second serial peripheral bus are not distorted, and the display is normal.
In one embodiment, as shown in fig. 3, the light emitting unit 31 includes a first light emitting unit 311 and a second light emitting unit 312, and the light emitting units may be LED lamps, wherein the first light emitting unit and the second light emitting unit may be the same.
In one embodiment, as shown in fig. 3, the light emitting driving chip 33 includes a first light emitting driving chip 331 and a second light emitting driving chip 332, and the micro control unit 34 includes a first micro control unit 341 and a second micro control unit 342, wherein the first light emitting driving chip and the second light emitting driving chip may be the same, and the first micro control unit and the second micro control unit may be the same.
In one embodiment, the first serial peripheral bus and the second serial peripheral bus each include a serial peripheral clock signal line, a serial peripheral data output signal line, and a serial peripheral chip select signal line.
In an embodiment, the filter circuit is a first-order filter circuit, the first-order filter circuit includes a resistor and a capacitor, the resistor is set to be 100 ohms, and the size of the capacitor is 10 picofarads, as shown in fig. 6, (a) in fig. 6 is a waveform diagram of a serial peripheral clock signal in the existing backlight module, as can be seen from (a) in fig. 6, the serial peripheral clock signal may fluctuate due to an interference signal in the existing serial peripheral clock signal, and (b) in fig. 6 is a waveform diagram of a serial peripheral clock signal in the backlight module provided in the embodiment of the present application, as can be seen from (b) in fig. 6, by setting the filter circuit, the serial peripheral clock signal may not fluctuate, thereby ensuring stability of the serial peripheral clock signal and ensuring normal display.
As shown in fig. 7, an embodiment of the present application provides a display device, which includes a display panel 71 and a backlight module 30, where the display panel 71 is connected to the backlight module through a high-definition multimedia interface, and the backlight module 30 includes:
a light emitting unit 31;
the driving board 32 comprises a light-emitting driving chip 33 and a micro control unit 34, one end of the light-emitting driving chip 33 is connected with the light-emitting unit 31, and the other end of the light-emitting driving chip 33 is connected with the micro control unit 34;
a system-on-chip 35, wherein the system-on-chip 35 is connected with the micro control unit 34 through a first serial peripheral bus 37;
the filter circuit 36 is connected in series to the first serial peripheral bus 37.
The embodiment of the application provides a display device, which comprises a display panel and a backlight module, wherein the display panel is connected with the backlight module through a high-definition multimedia interface, the backlight module comprises a light-emitting unit, a driving board and a system level chip, the driving board comprises a light-emitting driving chip and a micro-control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, the other end of the light-emitting driving chip is connected with the micro-control unit, the system level chip is connected with the micro-control unit through a first serial peripheral bus, a filter circuit is connected in series on the first serial peripheral bus, the filter circuit can filter interference signals in the first serial peripheral bus through connecting the filter circuit in series on the first serial peripheral bus, the stability of signals of the first serial peripheral bus is ensured, and the problem that SPI wiring existing in the existing display screen is easily interfered is solved, resulting in signal distortion and causing display picture error.
According to the above embodiment:
the embodiment of the application provides a backlight module and a display device, the backlight module comprises a light-emitting unit, a driving board and a system-on-chip, the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, the other end of the luminous driving chip is connected with the micro control unit, the system level chip is connected with the micro control unit through a first serial peripheral bus, wherein, the first serial peripheral bus is connected with a filter circuit in series, the filter circuit is connected with the first serial peripheral bus in series, make filter circuit can filter the interference signal in the first serial peripheral bus, guarantee first serial peripheral bus signal's stability, solved current display screen and had SPI to walk the line and easily receive the interference, lead to signal distortion, cause the technical problem that the display frame made mistakes.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The backlight module and the display device provided by the embodiment of the present application are described in detail above, and a specific example is applied to illustrate the principle and the implementation manner of the present application, and the description of the embodiment is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A backlight module, comprising:
a light emitting unit;
the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, and the other end of the light-emitting driving chip is connected with the micro control unit;
the system-level chip is connected with the micro control unit through a first serial peripheral bus;
and the first serial peripheral bus is connected with a filter circuit in series.
2. The backlight module as claimed in claim 1, wherein the filter circuit comprises a first-order filter circuit, the first-order filter circuit comprises a resistor and a capacitor, one end of the resistor is connected to the system-on-chip, the other end of the resistor is connected to the capacitor, the other end of the resistor is connected to the micro control unit, and the other end of the capacitor is grounded.
3. The backlight module as claimed in claim 2, wherein the resistance of the resistor is in a range of 50 ohms to 200 ohms, and the capacitance is in a range of 5 picofarads to 20 picofarads.
4. The backlight module of claim 1, wherein the first serial peripheral bus comprises a serial peripheral clock signal line, a serial peripheral data output signal line, and a serial peripheral chip select signal line, at least one of the serial peripheral clock signal line, the serial peripheral data output signal line, and the serial peripheral chip select signal line being connected in series with the filter circuit.
5. The backlight module as claimed in claim 4, wherein a first filter circuit is connected in series to the serial peripheral clock signal line.
6. The backlight module as claimed in claim 5, wherein a second filter circuit is connected in series to the serial peripheral data output signal line.
7. The backlight module as claimed in claim 6, wherein a third filter circuit is connected in series to the serial peripheral chip select signal line.
8. The backlight module as claimed in claim 7, wherein the first filter circuit, the second filter circuit and the third filter circuit are the same.
9. The backlight module as claimed in claim 1, wherein the light emitting driving chip and the micro control unit are connected through a second serial peripheral bus, the driving board includes a first driving board and a second driving board, the first driving board includes a first light emitting driving chip and a first micro control unit, the second driving board includes a second light emitting driving chip and a second micro control unit, the first serial peripheral bus includes a first sub-string peripheral bus and a second sub-string peripheral bus, the system level chip is connected with the first micro control unit through the first sub-string peripheral bus, the system level chip is connected with the second micro control unit through the second sub-string peripheral bus, the second serial peripheral bus includes a third sub-string peripheral bus and a fourth sub-string peripheral bus, the first micro control unit and the first light emitting driving chip are connected through the third sub-string peripheral bus, the second micro control unit is connected with the second light-emitting driving chip through a fourth sub-serial peripheral bus, and a filter circuit is connected in series on the second serial peripheral bus.
10. The utility model provides a display device which characterized in that, includes display panel and backlight unit, display panel passes through high definition multimedia interface and is connected with backlight unit, backlight unit includes:
a light emitting unit;
the driving board comprises a light-emitting driving chip and a micro control unit, one end of the light-emitting driving chip is connected with the light-emitting unit, and the other end of the light-emitting driving chip is connected with the micro control unit;
the system-level chip is connected with the micro control unit through a first serial peripheral bus;
and the first serial peripheral bus is connected with a filter circuit in series.
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| CN202010273518.8A CN111369951A (en) | 2020-04-09 | 2020-04-09 | Backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114758629A (en) * | 2022-06-16 | 2022-07-15 | 惠科股份有限公司 | Backlight module and lighting method thereof |
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