CN220553284U - 288-partition Mini LED backlight driving circuit - Google Patents
288-partition Mini LED backlight driving circuit Download PDFInfo
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- CN220553284U CN220553284U CN202321501683.XU CN202321501683U CN220553284U CN 220553284 U CN220553284 U CN 220553284U CN 202321501683 U CN202321501683 U CN 202321501683U CN 220553284 U CN220553284 U CN 220553284U
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- 238000005192 partition Methods 0.000 title claims abstract description 40
- 239000011324 bead Substances 0.000 claims abstract description 51
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 26
- 101000716775 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) Probable E3 ubiquitin ligase complex SCF subunit scon-2 Proteins 0.000 claims description 11
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 206010047571 Visual impairment Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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- 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
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Abstract
The utility model discloses a 288 partition Mini LED backlight driving circuit, which comprises a Mini LED driving board circuit, a connector and a peripheral auxiliary circuit, wherein the Mini LED driving board circuit is arranged on a circuit board and is connected with a backlight control module through the connector; the Mini LED lamp bead circuit comprises 1152 Mini LED lamp beads and peripheral auxiliary circuits thereof, and the Mini LED driving circuit comprises Mini LED driving chips. According to the utility model, the Mini LED lamp bead circuit and the Mini LED driving circuit are arranged on the same circuit board, so that independent dimming of each dimming partition is realized, and the brightness required by each area for displaying an image is better matched.
Description
Technical Field
The utility model relates to the field of liquid crystal display, in particular to a 288-partition Mini LED backlight driving circuit.
Background
Backlight products on the market are roughly divided into OLED backlights and miniled backlights. The OLED has the greatest characteristics of self-luminescence, and each pixel behind the screen can be controlled independently, so that the OLED has excellent brightness and contrast, and is light, thin and flexible, so that the OLED is favored by mobile phone manufacturers. But also has the following problems: 1. the service life is short. 2. The manufacturing cost is high. 3. The color purity is insufficient. 4. Rong Yishao screen. 5. The pixel density is low.
Whereas minileds are a new panel backlight technology for LCD display technology, using smaller diode light sources, this means that more dimming areas will occur on the same area. Compared with an OLED, the MiniLED can bring ultrahigh contrast, ultrahigh brightness and ultrahigh color gamut, and even the problems of afterimage and screen burning caused by long-time starting of an OLED screen can not be generated, so that the MiniLED technology is more suitable for being applied to large-screen real equipment, and a control circuit of the MiniLED is needed at present.
Disclosure of Invention
The technical purpose is that: aiming at the defects in the prior art, the utility model discloses a 288-partition Mini LED backlight driving circuit, which is characterized in that a Mini LED lamp bead circuit and a Mini LED driving circuit are arranged on a circuit board, so that independent dimming of each dimming partition is realized, and the brightness required by each area of a display image is better matched.
The technical scheme is as follows: in order to achieve the technical purpose, the utility model adopts the following technical scheme.
The 288-partition Mini LED backlight driving circuit comprises a Mini LED driving board circuit, a connector and a peripheral auxiliary circuit, wherein the Mini LED driving board circuit is arranged on a circuit board and is connected with a backlight control module through the connector, the Mini LED driving board circuit comprises a Mini LED lamp bead circuit and a Mini LED driving circuit, and the Mini LED driving circuit is used for controlling dimming of the Mini LED lamp bead circuit; the Mini LED lamp bead circuit comprises 1152 Mini LED lamp beads and peripheral auxiliary circuits thereof, wherein the Mini LED drive circuit comprises Mini LED drive chips, and the peripheral auxiliary circuits are used for realizing capacitive filtering and circuit energy storage for the Mini LED lamp bead circuit.
Preferably, the backlight control module is an additional dcon board for providing the first input signal SCON1 and the second input signal SCON2 for the Mini LED driving board circuit and providing a voltage of 5V for each driving chip in the Mini LED driving board circuit.
Preferably, the Mini LED driving board circuit is connected with the backlight control module through two connectors with 20 pins, the two connectors with 20 pins are U73 and U74 respectively, the first input signal SCON1 is connected with the pin 14 of U73 through the resistor R1, the first input signal SCON1 is connected with the pin 10 of U73 through the capacitor C1, and the pins 5 to 13 of U73 are grounded after being short-circuited; pin 15 to pin 18 of U73 are short-circuited and then connected with vdd_5v_setion1 signal, and pin 15 to pin 18 of U73 are short-circuited and then grounded through capacitor C3; pin 1 to pin 4 of the U73 are connected with a VLED_SECTION1 signal after being short-circuited, and pin 1 to pin 4 of the U73 are connected with pin 5 of the U73 through a capacitor C2 after being short-circuited;
pin 1 to pin 3 of U74 are short-circuited and then grounded through a capacitor C5, pin 1 to pin 3 of U74 are short-circuited and then connected with vdd_5v_setion1 signals, and pin 4 to pin 8 of U74 are short-circuited and then connected with pin 9 of U74 through a capacitor C4; pin 4 to pin 8 of U74 are short-circuited and then connected with vled_setion 1 signal, pin 9 to pin 15 of U74 are short-circuited and then grounded, pin 15 of U73 is grounded through resistor R37 and capacitor C109, and pin 15 of U73 is connected with second input signal SCON2 through resistor R37; pin 17 and pin 18 of U73 are shorted to vdd_5v_setion1 signal.
Preferably, the Mini LED driving circuit comprises 72 Mini LED driving chips, and is divided into an upper area and a lower area; each region comprises 36 cascaded Mini LED driving chips; the pins 1 to 4 of the Mini LED driving chip are respectively connected with a Mini LED lamp bead partition, and each Mini LED lamp bead partition comprises 4 Mini LED lamp beads connected in series; the pin 7 of the first Mini LED driving chip in the upper area is connected with a first input signal SCON1, the pin 7 of the first Mini LED driving chip in the lower area is connected with a second input signal SCON2, and other Mini LED driving chips are cascaded.
Preferably, the Mini LED driving chip adopts CX5810 chip, CX5820 chip, CX5830 chip or CX5832 chip.
Preferably, the Mini LED lamp bead circuit adopts a partition matrix, the Mini LED lamp bead partition matrix adopts an arrangement mode of 18 rows and 16 columns, 288 partitions are controlled in total, each partition comprises 4 Mini LED lamp beads, and 4 Mini LED lamp beads in each partition are connected in series.
Preferably, the Mini LED lamp bead is a HGC-AFCAUN22AWU-M blue LED chip.
Preferably, the peripheral circuit includes a capacitor C6, and the vled_setifo 1 signal is grounded through the capacitor C6, and the vled_setifo 1 signal is an anode power supply signal of the lamp bead, specifically a 12V dc voltage signal, and is provided by an additional regulated power supply.
The beneficial effects are that: according to the utility model, the Mini LED lamp bead circuit and the Mini LED driving circuit are arranged on the same circuit board, so that independent dimming of each dimming partition is realized, the brightness required by each area for displaying an image is better matched, and the LED lamp bead circuit and the Mini LED driving circuit can be used for backlight driving of an LCD screen with 27 inches or other sizes.
Drawings
FIG. 1 is a schematic view of a structural framework of the present utility model;
FIG. 2 is a circuit diagram of a Mini LED backlight driving circuit connector of the present utility model;
FIG. 3 is a schematic diagram of a circuit part of a driving chip of the Mini LED backlight driving circuit of the utility model;
FIG. 4 is a schematic diagram of a local 36 driver chip in the Mini LED backlight driver circuit of the present utility model;
fig. 5 is a schematic diagram of a peripheral auxiliary circuit according to the present utility model.
Description of the embodiments
A 288-partition Mini LED backlight driving circuit according to the present utility model is further described and explained with reference to the accompanying drawings.
As shown in the attached figure 1, the 288 partition Mini LED backlight driving circuit comprises a Mini LED driving board circuit, a connector and a peripheral auxiliary circuit, wherein the Mini LED driving board circuit is arranged on a circuit board and is connected with a backlight control module through the connector, the Mini LED driving board circuit comprises a Mini LED lamp bead circuit and a Mini LED driving circuit, and the Mini LED driving circuit is used for controlling dimming of the Mini LED lamp bead circuit; the Mini LED lamp bead circuit comprises 288 Mini LED lamp beads and peripheral auxiliary circuits thereof, wherein the Mini LED driving circuit comprises a Mini LED driving chip, and the peripheral auxiliary circuits are used for realizing capacitive filtering and circuit energy storage for the Mini LED lamp bead circuit.
As shown in fig. 1, the backlight control module is an additional dcon Board for providing the first input signal SCON1 and the second input signal SCON2 to the Mini LED driving Board circuit, and providing 5V voltage to each driving chip, i.e. driving IC, in the Mini LED driving Board circuit, the AD Board is a TCON Board for providing the input signal to the backlight control module, and simultaneously controlling the LCD display screen, and the NB is for providing the initial control signal for providing the input signal of HDMI, VGA, display-port, etc. to the AD Board. The HDMI is a full digital video and sound transmission interface and can transmit audio and video signals; VGA is a video graphics array signal interface; the Display-port is a Display communication port which depends on the data transmission technology of data packetization, and can be used for internal Display connection and external Display connection.
In the utility model, the Mini LED lamp bead circuit and the Mini LED drive circuit are arranged on the same circuit board, and redundant PCB and transmission lines are not needed, so that the inductance effect generated in the signal transmission process is reduced, the design is simpler, and the cost is also reduced.
As shown in fig. 2, in some embodiments of the present utility model, the Mini LED driving board circuit is connected to the backlight control module through two 20-pin connectors, where the two 20-pin connectors are U73 and U74, respectively, the vled_secton 1 signal is an anode power supply signal of the lamp bead, specifically, a 12V dc voltage signal, and is provided by an additional regulated power supply, the vdd_5v_secton 1 signal is a power supply signal of the driving IC, and is obtained from the backlight control module, the SCON1 signal is a first input signal, and the SCON2 signal is a second input signal.
The first input signal SCON1 is connected with the pin 14 of the U73 through a resistor R1, the first input signal SCON1 is connected with the pin 10 of the U73 through a capacitor C1, and the pins 5 to 13 of the U73 are grounded after short circuit; pin 15 to pin 18 of U73 are short-circuited and then connected with vdd_5v_setion1 signal, and pin 15 to pin 18 of U73 are short-circuited and then grounded through capacitor C3; the pins 1 to 4 of the U73 are connected with the VLED_SECTION1 signal after being short-circuited, and the pins 1 to 4 of the U73 are connected with the pin 5 of the U73 through the capacitor C2 after being short-circuited.
Pin 1 to pin 3 of U74 are short-circuited and then grounded through a capacitor C5, pin 1 to pin 3 of U74 are short-circuited and then connected with vdd_5v_setion1 signals, and pin 4 to pin 8 of U74 are short-circuited and then connected with pin 9 of U74 through a capacitor C4; pin 4 to pin 8 of U74 are short-circuited and then connected with vled_setion 1 signal, pin 9 to pin 15 of U74 are short-circuited and then grounded, pin 15 of U73 is grounded through resistor R37 and capacitor C109, and pin 15 of U73 is connected with second input signal SCON2 through resistor R37; pin 17 and pin 18 of U73 are shorted to vdd_5v_setion1 signal.
1152 Mini LED lamp beads in the Mini LED lamp bead circuit adopt a partition matrix, the Mini LED lamp bead partition matrix adopts an arrangement mode of 18 rows and 16 columns, 288 partitions are controlled in total, each partition comprises 4 Mini LED lamp beads, and 4 Mini LED lamp beads in each partition are connected in series. In some embodiments of the utility model, the Mini LED lamp bead is HGC-AFCAUN22AWU-M blue LED chip, and other types of Mini LEDs can be adopted as required in actual application scenes.
The Mini LED driving circuit comprises 72 Mini LED driving chips, and is divided into an upper area and a lower area. Each region includes 36 Mini LED driver chips in cascade. As shown in fig. 3 and fig. 4, fig. 4 is a schematic diagram of cascade connection of 36 Mini LED driving chips in the upper area, wherein each two driving chips, i.e. driving ICs, are grouped, and fig. 4 is a schematic diagram of actual circuit of fig. 3, i.e. a schematic diagram of circuit structure of a group of driving ICs. The Mini LED driving chip adopts CX5810 chip, CX5820 chip, CX5830 chip or CX5832 chip. In some embodiments of the present utility model, as shown in fig. 3, a Mini LED driving chip adopts a CX5810 chip, including two cascaded Mini LED driving chips U17 and U18, where pins 1 to 4 of the Mini LED driving chip U17 are respectively connected to a Mini LED lamp bead partition, and each Mini LED lamp bead partition includes 4 Mini LED lamp beads connected in series. The pin 7 of the first Mini LED driving chip is connected with a first input signal SCON1, and in the cascading process of 36 Mini LED driving chips in the next area, the pin 7 of the first Mini LED driving chip is connected with a second input signal SCON2; the other Mini LED driving chips are cascaded, namely, the output pin of the last Mini LED driving chip is connected with the input pin of the next Mini LED driving chip, for example, the pin 6 of the Mini LED driving chip U17 in the figure 3 is connected with the pin 7 of the Mini LED driving chip U18.
As shown in fig. 5, the peripheral auxiliary circuit of the present utility model includes a capacitor C6, and the vled_setion 1 signal is grounded through the capacitor C6, and the capacitor C6 functions as: on one hand, clutter of the VLED_SECTION1 signal is filtered, so that the waveform amplitude of the VLED_SECTION1 signal is smaller, and on the other hand, the defect that the voltage of the VLED_SECTION1 signal is insufficient to the later stage is prevented, and the capacitor C6 can store electric energy.
The working process of the utility model is as follows: HDMI, VGA or Display-port signals sent by the NB board are input into the AD board, after being processed by the AD board, the signals are transmitted to the backlight control module, SCON1 and SCON2 signals are sent by the backlight control module to control the drive IC, mini LED lamp beads in 288 partitions are further controlled, independent dimming of each dimming partition is achieved, and brightness required by each area for displaying images is better matched.
The utility model discloses a 288-partition Mini LED backlight driving circuit, which can control 288 backlight partitions, wherein each partition adopts a mode of connecting 4 LEDs in series and can be used for Mini LED backlight of a liquid crystal panel. The utility model adopts Mini LED multi-partition backlight screen display technology, divides the backlight area into a plurality of independent dimming partitions, can adjust the independent brightness of each partition, realizes more accurate backlight control on the screen area, and compared with the conventional LCD side-entry backlight and direct-type backlight technology, the method can better match the brightness required by each area for displaying images, achieves better brightness and contrast, and reduces power consumption. The utility model can be used for backlight driving of 27 inch or other size LCD screens.
The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.
Claims (8)
1. 288 subregion Mini LED backlight drive circuit, its characterized in that: the LED backlight module comprises a Mini LED drive board circuit, a connector and a peripheral auxiliary circuit, wherein the Mini LED drive board circuit is arranged on a circuit board and is connected with a backlight control module through the connector, and the Mini LED drive board circuit comprises a Mini LED lamp bead circuit and a Mini LED drive circuit which is used for controlling dimming of the Mini LED lamp bead circuit; the Mini LED lamp bead circuit comprises 1152 Mini LED lamp beads and peripheral auxiliary circuits thereof, wherein the Mini LED drive circuit comprises Mini LED drive chips, and the peripheral auxiliary circuits are used for realizing capacitive filtering and circuit energy storage for the Mini LED lamp bead circuit.
2. The 288-partitioned Mini LED backlight driving circuit of claim 1, wherein: the backlight control module is an additional dcon board and is used for providing a first input signal SCON1 and a second input signal SCON2 for the Mini LED driving board circuit and providing 5V voltage for each driving chip in the Mini LED driving board circuit.
3. The 288-partitioned Mini LED backlight driving circuit of claim 2, wherein: the Mini LED drive board circuit is connected with the backlight control module through two connectors of 20 pins, the connectors of the two 20 pins are U73 and U74 respectively, a first input signal SCON1 is connected with a pin 14 of the U73 through a resistor R1, the first input signal SCON1 is connected with a pin 10 of the U73 through a capacitor C1, and a pin 5 to a pin 13 of the U73 are grounded after being short-circuited; pin 15 to pin 18 of U73 are short-circuited and then connected with vdd_5v_setion1 signal, and pin 15 to pin 18 of U73 are short-circuited and then grounded through capacitor C3; pin 1 to pin 4 of the U73 are connected with a VLED_SECTION1 signal after being short-circuited, and pin 1 to pin 4 of the U73 are connected with pin 5 of the U73 through a capacitor C2 after being short-circuited;
pin 1 to pin 3 of U74 are short-circuited and then grounded through a capacitor C5, pin 1 to pin 3 of U74 are short-circuited and then connected with vdd_5v_setion1 signals, and pin 4 to pin 8 of U74 are short-circuited and then connected with pin 9 of U74 through a capacitor C4; pin 4 to pin 8 of U74 are short-circuited and then connected with vled_setion 1 signal, pin 9 to pin 15 of U74 are short-circuited and then grounded, pin 15 of U73 is grounded through resistor R37 and capacitor C109, and pin 15 of U73 is connected with second input signal SCON2 through resistor R37; pin 17 and pin 18 of U73 are shorted to vdd_5v_setion1 signal.
4. The 288-partitioned Mini LED backlight driving circuit of claim 1, wherein: the Mini LED driving circuit comprises 72 Mini LED driving chips, and is divided into an upper area and a lower area; each region comprises 36 cascaded Mini LED driving chips; the pins 1 to 4 of the Mini LED driving chip are respectively connected with a Mini LED lamp bead partition, and each Mini LED lamp bead partition comprises 4 Mini LED lamp beads connected in series; the pin 7 of the first Mini LED driving chip in the upper area is connected with a first input signal SCON1, the pin 7 of the first Mini LED driving chip in the lower area is connected with a second input signal SCON2, and other Mini LED driving chips are cascaded.
5. The 288-partitioned Mini LED backlight driving circuit of claim 4, wherein: the Mini LED driving chip adopts CX5810 chip, CX5820 chip, CX5830 chip or CX5832 chip.
6. The 288-partitioned Mini LED backlight driving circuit of claim 1, wherein: the Mini LED lamp bead circuit adopts a partition matrix, the Mini LED lamp bead partition matrix adopts an arrangement mode of 18 rows and 16 columns, 288 partitions are controlled in total, each partition comprises 4 Mini LED lamp beads, and 4 Mini LED lamp beads in each partition are connected in series.
7. The 288-partitioned Mini LED backlight driving circuit of claim 6, wherein: the Mini LED lamp bead is of a HGC-AFCAUN22AWU-M blue LED chip.
8. The 288-partitioned Mini LED backlight driving circuit of claim 1, wherein: the peripheral auxiliary circuit comprises a capacitor C6, the VLED_SECTION1 signal is grounded through the capacitor C6, the VLED_SECTION1 signal is an anode power supply signal of the lamp bead, particularly a 12V direct current voltage signal, and the signal is provided through an additional stabilized voltage supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321501683.XU CN220553284U (en) | 2023-06-13 | 2023-06-13 | 288-partition Mini LED backlight driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321501683.XU CN220553284U (en) | 2023-06-13 | 2023-06-13 | 288-partition Mini LED backlight driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220553284U true CN220553284U (en) | 2024-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321501683.XU Active CN220553284U (en) | 2023-06-13 | 2023-06-13 | 288-partition Mini LED backlight driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220553284U (en) |
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2023
- 2023-06-13 CN CN202321501683.XU patent/CN220553284U/en active Active
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