1152 partition lamp drive separation type Mini LED backlight drive control circuit

Abstract

The utility model discloses a 1152 partition lamp drive separation type Mini LED backlight drive control circuit, which comprises a Mini LED drive circuit and a Mini LED lamp panel, the Mini LED drive circuit comprises a Mini LED drive board, the Mini LED drive board and the Mini LED lamp panel are correspondingly connected through a connector and are used for controlling dimming of the Mini LED lamp panel, the Mini LED drive board comprises a Mini LED backlight drive chip, a host outputs an SPI Bus signal to the Mini LED drive board, and the Mini LED drive board is used for controlling dimming of the Mini LED lamp panel. The Mini LED backlight control module is used for controlling a Mini LED backlight driving chip on the Mini LED driving board; according to the utility model, each Mini LED lamp bead in the 1152 area can realize independent dimming, so that resources are saved, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and in particular to a 1152 partition lamp drive separation type Mini LED backlight drive control circuit. Background Art

[0002] Mini LED multi-zone backlight screen display technology is a form of micro backlight configured in the full-array local dimming (FALD) area, which can achieve a finer and more pixelated dynamic backlight effect. Compared with traditional LCD edge-entry backlight and direct-down backlight technology, Mini LED has better dynamic backlight management, achieving better brightness and contrast, and more precise backlight control of the screen area. Compared with OLED, it has higher brightness and lifespan.

[0003] Traditional LED driving circuits and lamp beads are integrated together. Once the circuit in the lamp bead is damaged, the entire LED lamp needs to be replaced, which not only wastes resources but also increases the cost of use. Utility Model Content

[0004] Technical purpose: In view of the above-mentioned deficiencies in the prior art, the utility model discloses a 1152-zone lamp-driven separated Mini LED backlight drive control circuit. This drive control circuit controls 1152 backlight zones and can be applied to Mini LED backlight products for 65-inch LCD panels.

[0005] Technical solution: To achieve the above technical objectives, the utility model adopts the following technical solution:

[0006] A 1152 zone lamp drive separation type Mini LED backlight drive control circuit includes a Mini LED drive circuit and a Mini LED light board, wherein the Mini LED drive circuit includes a Mini LED drive board, and the Mini LED drive board and the Mini LED light board are correspondingly connected via a connector for controlling the dimming of the Mini LED light board, and the Mini LED drive board includes a Mini LED backlight drive chip, and the host outputs an SPI Bus signal to the Mini LED drive board for controlling the Mini LED backlight drive chip on the Mini LED drive board.

[0007] Preferably, the Mini LED light board includes 1152 Mini LED lamp beads and 24 60-pin connectors, the 1152 Mini LED lamp beads are divided into 1152 areas, each of the connectors is connected to 48 Mini LED lamp beads, and is used to provide input signals for the Mini LED lamp beads; the connection structures of the 24 connectors are similar, pins 1 to 12 are all connected to the VLED signal to provide power for the Mini LED lamp beads, and pins 13 to 60 output COUT signals for controlling the Mini LED lamp beads.

[0008] Preferably, the Mini LED driver board includes a main driver board and three auxiliary driver boards. A main control chip is arranged on the main driver board. The main control chip has an SPI interface for transmitting SPI video data signals, and pins 13 to 24, pins 27 to 29, pins 31 to 35, and pins 38 to 41 on the main control chip are respectively connected to the Mini LED backlight driver chips on the main driver board and the auxiliary driver board. The main control chip receives the SPI Bus signal output by the host, and then sends a control signal to the Mini LED backlight driver chip through the corresponding pins.

[0009] Preferably, the main driving board and the auxiliary driving board are both provided with 36 8-channel Mini LED backlight driver chips and 6 60-pin connectors 2, the 36 8-channel Mini LED backlight driver chips are divided into two upper and lower areas, each area is divided into 3 groups, each group is composed of 6 Mini LED backlight driver chips cascaded, the input end of the first Mini LED backlight driver chip in each group is connected to the corresponding pin of the main control chip, the output end of the Mini LED backlight driver chip in each group is connected to the input end of the next Mini LED backlight driver chip, pins 2 to 6 and pins 8 to 10 of each Mini LED backlight driver chip are correspondingly connected to connector 2 and output COUT signals; the connection structures of the 6 60-pin connectors 2 are similar, and the pins of connector 2 are connected correspondingly to the pins of connector 1.

[0010] Preferably, the main drive board and the three auxiliary drive boards are connected in sequence in parallel through a 24-pin connector three. The main drive board is provided with a 24-pin connector three for connecting to an adjacent auxiliary drive board. The two middle auxiliary drive boards are each provided with two 24-pin connectors three for connecting to the adjacent main drive board or auxiliary drive board. The auxiliary drive board at the end is provided with a 24-pin connector three for connecting to an adjacent auxiliary drive board.

[0011] Preferably, the model of the Mini LED backlight driver chip is a CX5831 chip, and the model of the main control chip is GW1N-UV9-QN48.

[0012] Beneficial effects:

[0013] The utility model provides a 1152-zone Mini LED backlight driving circuit solution. As a new backlight display technology, the solution is provided with a main driving board and three auxiliary driving boards, and 36 8-channel Mini LED backlight driving chips are arranged on each driving board. The channel of each Mini LED backlight driving chip is individually connected to a Mini LED lamp bead, and then 6 Mini LED backlight driving chips are cascaded as a group and connected to the main control chip, so that the Mini LED lamp beads on the MiniLED lamp board are divided into 1152 zones, and each Mini LED lamp bead can realize independent dimming. At the same time, because of the cascading of the Mini LED backlight driving chips, multi-zone joint control can also be realized. When in use, when a Mini LED lamp bead is damaged, only the damaged part of the Mini LED lamp beads needs to be replaced, and there is no need to replace other circuits, which saves resources and reduces the use cost.

[0014] At the same time, the Mini LED backlight driver chip used supports 64-level DC dimming and PWM dimming up to 1024 levels. It can more accurately adjust the different brightness of each area of ​​the displayed image, increase the display contrast, and optimize the display effect of LCD TVs. It can be used for backlight driving of TV screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 It is a schematic diagram of the system structure framework of the utility model;

[0017] Figure 2 This is a partial circuit diagram of the Mini LED driver board connection interface of the utility model;

[0018] Figure 3 This is a partial circuit diagram of the Mini LED driver board light board connector of the utility model;

[0019] Figure 4 This is a partial circuit diagram of the Mini LED backlight driver chip of the utility model;

[0020] Figure 5 This is a circuit diagram of the main control chip of the utility model. DETAILED DESCRIPTION

[0021] The present invention will be described more clearly and completely below by way of a preferred embodiment in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiment.

[0022] like Figure 1 As shown, a 1152 partition lamp drive separation type Mini LED backlight drive control circuit includes a Mini LED drive circuit and a Mini LED light board, wherein the Mini LED drive circuit includes a Mini LED drive board, and the Mini LED drive board and the Mini LED light board are correspondingly connected via a connector for controlling the dimming of the Mini LED light board, and the Mini LED drive board includes a Mini LED backlight drive chip, and the model of the Mini LED backlight drive chip is a CX5831 chip, and the host outputs an SPI Bus signal to the Mini LED drive board for controlling the Mini LED backlight drive chip on the Mini LED drive board.

[0023] The Mini LED driver board includes a main driver board and three auxiliary driver boards. The main driver board is provided with a main control chip, and the model of the main control chip is GW1N-UV9-QN48. The main control chip has an SPI interface for transmitting SPI video data signals. Pins 13 to 24, pins 27 to 29, pins 31 to 35, and pins 38 to 41 on the main control chip are respectively connected to the Mini LED backlight driver chips on the main driver board and the auxiliary driver board. The host outputs the SPI Bus signal to the SPI interface of the main control chip, which is received by the main control chip and converted into a control signal, and then the control signal is sent to the Mini LED backlight driver chip through the corresponding pins.

[0024] like Figure 4 and Figure 5As shown, the main driver board and the auxiliary driver board are both provided with 36 8-channel Mini LED backlight driver chips and 6 60-pin connectors 2. The 36 8-channel Mini LED backlight driver chips are divided into two upper and lower areas, each area is divided into 3 groups, each group is composed of 6 Mini LED backlight driver chips cascaded, the input end DIN of the first Mini LED backlight driver chip in each group is connected to the corresponding pin of the main control chip, the output end DOUT of the Mini LED backlight driver chip in each group is connected to the input end of the next Mini LED backlight driver chip, and pins 2 to 6 and pins 8 to 10 of each Mini LED backlight driver chip are correspondingly connected to connector 2 and output COUT signals. Specifically, the first Mini LED backlight driver chip of the three groups of cascaded Mini LED backlight driver chips in the upper and lower areas of the main driver board The output end DIN of the LED backlight driver chip receives the signals A_SCON1, A_SCON2, A_SCON3, B_SCON1, B_SCON2, and B_SCON3 from the main control chip respectively. The output end DIN of the first Mini LED backlight driver chip of the three groups of cascaded Mini LED backlight driver chips in the upper and lower areas on the first sub-driver board receives the signals C_SCON1, C_SCON2, C_SCON3, D_SCON1, D_SCON2, and D_SCON3 from the main control chip respectively. The output end DIN of the first Mini LED backlight driver chip of the three groups of cascaded Mini LED backlight driver chips in the upper and lower areas on the second sub-driver board receives the signals E_SCON1, E_SCON2, E_SCON3, F_SCON1, F_SCON2, and F_SCON3 from the main control chip respectively. The output end DIN of the first Mini LED backlight driver chip of the three groups of cascaded Mini LED backlight driver chips in the upper and lower areas on the third sub-driver board receives the signals E_SCON1, E_SCON2, E_SCON3, F_SCON1, F_SCON2, and F_SCON3 from the main control chip respectively. The output end DIN of the LED backlight driver chip receives signals G_SCON1, G_SCON2, G_SCON3, H_SCON1, H_SCON2, and H_SCON3 from the main control chip, respectively corresponding to pins 13 to 24, pins 27 to 29, pins 31 to 35, and pins 38 to 41 on the main control chip.

[0025] like Figure 2As shown, it is a circuit diagram of the connection interface of the Mini LED driver board. The main driver board and the three auxiliary driver boards are connected in parallel in sequence through a 24-pin connector three. The main driver board is provided with a 24-pin connector three for connecting with an adjacent auxiliary driver board. The two auxiliary driver boards located in the middle are provided with two 24-pin connectors three for connecting with an adjacent main driver board or auxiliary driver board. The auxiliary driver board located at the end is provided with a 24-pin connector three for connecting with an adjacent auxiliary driver board. Any 6 pins from pins 1 to 18 of the connector three on the main driver board are respectively connected to the input ends of the cascade of 6 groups of Mini LED backlight driver chips on the adjacent auxiliary driver boards, and the input signals C_SCON1, C_SCON2, C_SCON3, D_SCON1, D_SCON2, and D_SCON3. One of the two connectors three on the auxiliary driver board adjacent to the main driver board is connected to the connector three on the main driver board, and any 6 pins from pins 1 to 18 of the other connector three are connected to the 6 groups of Mini LED backlight driver chips on the next auxiliary driver board. The input ends of the LED backlight driver chip cascade are connected correspondingly, and the signals E_SCON1, E_SCON2, E_SCON3, F_SCON1, F_SCON2, and F_SCON3 are respectively connected. One of the two connectors three on the third auxiliary driver board is connected correspondingly to the connector three on the previous adjacent auxiliary driver board, and any 6 pins from pins 1 to 18 of the other connector three are connected correspondingly to the input ends of the 6 groups of Mini LED backlight driver chips on the next auxiliary driver board, and the signals G_SCON1, G_SCON2, G_SCON3, H_SCON1, H_SCON2, and H_SCON3 are respectively connected, which are used to connect the main control chip on the main driver board and the MiniLED backlight driver chips on the three auxiliary driver boards. Pins 19 to 21 of the connector three are all grounded, and pins 22 to 24 of the connector three are all connected to VDD.

[0026] like Figure 3 As shown in the figure, it is a partial circuit diagram of the Mini LED driver board light board connector, that is, a circuit structure diagram of a connector 2. The pin connections of the six connectors 2 on each driver board are similar. Pins 1 to 12 of each connector 2 are connected to the signal VLED, which is used to provide power for the Mini LED lamp beads. Pins 13 to 60 output COUT signals, such as Figure 3The first connector 2 on the main driver board has pins 13 to 60 connected to the 8 output pins of the first group of cascaded 6 MiniLED backlight driver chips on the main driver chip, and outputs A1_COUT1_0 to A1_COUT1_7, A1_COUT2_0 to A1_COUT2_7, A1_COUT3_0 to A1_COUT3_7, A1_COUT4_0 to A1_COUT4_7, A1_COUT5_0 to A1_COUT5_7, and A1_COUT6_0 to A1_COUT6_7. The pin connections of other connectors 2 are similar, and are connected to the 8 output pins of the corresponding cascaded 6 MiniLED backlight driver chips.

[0027] Figure 4 As shown in the figure, it is a partial circuit diagram of the Mini LED backlight driver chip. Pins 2 to 6 and pins 8 to 10 of each Mini LED backlight driver chip are connected to connector 2 accordingly and output COUT signals. In the figure, pins 2 to 6 of the Mini LED backlight driver chip U6 are connected to signals A1_COUT1_7, A1_COUT1_6, A1_COUT1_5, A1_COUT1_4, and A1_COUT1_3 respectively, and pins 8 to 10 are connected to signals A1_COUT1_2, A1_COUT1_1, and A1_COUT1_0 respectively. The pins of other Mini LED backlight driver chips U7, U8, U9, U10, and U11 are similar to the pin connections of U7.

[0028] The Mini LED lamp board includes 1152 Mini LED lamp beads and 24 60-pin connectors. The 1152 Mini LED lamp beads are divided into 1152 areas. Each of the connectors is connected to 48 Mini LED lamp beads to provide input signals for the Mini LED lamp beads. The connection structures of the 24 connectors are similar. Pins 1 to 12 are connected to VLED signals to provide power for the Mini LED lamp beads. Pins 13 to 60 output A1_COUT signals, which are A1_COUT1_0 to A1_COUT1_7, A1_COUT2_0 to A1_COUT2_7, A1_COUT3_0 to A1_COUT3_7, A1_COUT4_0 to A1_COUT4_7, A1_COUT5_0 to A1_COUT5_7, and A1_COUT6_0 to A1_COUT6_7, respectively, to control the Mini LED lamp bead, the pins of connector one are connected correspondingly to the pins of connector two.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A 1152 zone lamp drive separation Mini LED backlight drive control circuit, characterized in that: It includes a Mini LED driving circuit and a Mini LED light board. The Mini LED driving circuit includes a Mini LED driving board. The Mini LED driving board and the Mini LED light board are correspondingly connected via a connector to control the dimming of the Mini LED light board. The Mini LED driving board includes a Mini LED backlight driving chip. The host outputs an SPI Bus signal to the Mini LED driving board to control the Mini LED backlight driving chip on the Mini LED driving board.

2. According to claim 1, a 1152-zone lamp drive separation Mini LED backlight drive control circuit is characterized in that: The Mini LED light board includes 1152 Mini LED lamp beads and 24 60-pin connectors. The 1152 Mini LED lamp beads are divided into 1152 areas. Each of the connectors is connected to 48 Mini LED lamp beads to provide input signals for the Mini LED lamp beads. The connection structures of the 24 connectors are similar. Pins 1 to 12 are all connected to the VLED signal to provide power for the Mini LED lamp beads. Pins 13 to 60 output COUT signals to control the Mini LED lamp beads.

3. According to claim 2, a 1152-zone lamp drive separation Mini LED backlight drive control circuit is characterized in that: The Mini LED driver board includes a main driver board and three auxiliary driver boards. A main control chip is arranged on the main driver board. The main control chip has an SPI interface for transmitting SPI video data signals. Pins 13 to 24, pins 27 to 29, pins 31 to 35, and pins 38 to 41 on the main control chip are respectively connected to the Mini LED backlight driver chips on the main driver board and the auxiliary driver board. The main control chip receives the SPI Bus signal output by the host, and then sends a control signal to the Mini LED backlight driver chip through the corresponding pins.

4. According to claim 3, a 1152-zone lamp drive separation Mini LED backlight drive control circuit is characterized in that: The main driver board and the auxiliary driver board are both provided with 36 8-channel Mini LED backlight driver chips and 6 60-pin connectors 2. The 36 8-channel Mini LED backlight driver chips are divided into two upper and lower areas, each area is divided into 3 groups, each group is composed of 6 Mini LED backlight driver chips in cascade, the input end of the first Mini LED backlight driver chip in each group is connected to the corresponding pin of the main control chip, the output end of the Mini LED backlight driver chip in each group is connected to the input end of the next Mini LED backlight driver chip, pins 2 to 6 and pins 8 to 10 of each Mini LED backlight driver chip are correspondingly connected to connector 2 and output COUT signals; the connection structures of the 6 60-pin connectors 2 are similar, and the pins of connector 2 are connected correspondingly to the pins of connector 1.

5. According to claim 4, a 1152-zone lamp drive separation Mini LED backlight drive control circuit is characterized in that: The main drive board and the three auxiliary drive boards are connected in parallel in sequence through a 24-pin connector three. The main drive board is provided with a 24-pin connector three for connecting to an adjacent auxiliary drive board. The two auxiliary drive boards in the middle are each provided with two 24-pin connectors three for connecting to an adjacent main drive board or auxiliary drive board. The auxiliary drive board at the end is provided with a 24-pin connector three for connecting to an adjacent auxiliary drive board.

6. According to claim 3, a 1152-zone lamp drive separation Mini LED backlight drive control circuit is characterized in that: The model of the Mini LED backlight driver chip is the CX5831 chip, and the model of the main control chip is GW1N-UV9-QN48.

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