TWI812055B - Mini light-emitting diode backlight system and mini light-emitting diode backlight local dimming control method - Google Patents

Abstract

A mLED backlight system includes a backlight control circuit and a backlight module. The backlight control circuit outputs m sets of mIC control signals. Each set includes k parallel control signals and j serial control signals. The backlight module is coupled to the backlight control circuit. The backlight module includes (m*n) mICs and (m*n*p) mLEDs. The (m*n) mICs arranged in series and parallel are divided into m groups of mICs and each group includes n mICs. The n mICs coupled in series to transmit the j serial control signals in sequence and each mIC of the n mICs receives the k parallel control signals. The (m*n*p) mLEDs are coupled to the (m*n) mICs. The (m*n) mICs control the (m*n*p) mLEDs to selectively emit light according to the m groups of mIC control signals to realize local-dimming of the backlight module. m, k, j, n, and p are positive integers.

Description

Mini LED backlight system and mini LED backlight area dimming control method

The present invention relates to displays, and in particular to a mini light-emitting diode (Mini LED) backlight system and a control method for mini LED backlight area dimming.

With the advancement of light-emitting diode chip size miniaturization technology, when the size of the light-emitting diode chip is reduced to 50-200 μm, it is called a mini light-emitting diode (mini LED). Compared with liquid crystal (LCD) and organic light-emitting diode (OLED) display technologies, mini LED technology has the advantages of high brightness, high contrast, high luminous efficiency, low energy consumption, wide color gamut, high response speed and ultra-long life. , so it has been widely used in display backlight systems.

However, the current mini-LED backlight system still encounters many problems in practical applications. For example, the backlight module lacks a good regional dimming control mechanism and is difficult to present different backlight display effects. These problems need to be further solved.

Therefore, the present invention proposes a mini LED backlight system and a mini LED backlight area dimming control method, thereby effectively solving the above problems encountered in the prior art.

A preferred embodiment according to the present invention is a mini light-emitting diode backlight system. In this embodiment, the mini LED backlight system includes a backlight control circuit and a backlight module. The backlight control circuit outputs m sets of mini-light emitting diode driving integrated circuit (mIC) control signals through m transmission ports respectively, where each set of mIC control signals includes k parallel control signals and j series control signals, and m, k , j are all positive integers. The backlight module is coupled to the backlight control circuit. The backlight module includes (m*n) mICs and (m*n*p) mini light-emitting diodes. (m*n) mIC systems are arranged in series and parallel. The (m*n) mICs are divided into m groups of mICs and each group of mICs includes n mICs. The n mICs are connected in series with each other to sequentially transmit the j series control signals and each mIC in the n mICs respectively receives the k parallel control signals, where n is a positive integer. The (m*n*p) mini light-emitting diodes are respectively coupled to the (m*n) mICs. The (m*n) mIC controls the (m*n*p) mini light-emitting diodes to selectively emit light according to the m set of mIC control signals to achieve local dimming of the backlight module, where p is a positive integer.

In one embodiment, when the j series control signals are sequentially transmitted to the last mIC among the n mICs, the last mIC transmits the j series control signals back to the backlight control circuit and the j The series control signal includes feedback information.

In one embodiment, the j series control signals are used to transmit specific commands and feedback mechanisms and the k parallel control signals are used for data transmission and settings.

In one embodiment, the backlight control circuit generates the m sets of mIC control signals correspondingly according to the backlight control signal from the timing control circuit.

In one embodiment, the backlight control circuit outputs different m sets of mIC control signals through the m transmission ports, thereby changing the local dimming of the backlight module to present different backlight display effects.

In one embodiment, the different m sets of mIC control signals include a plurality of instructions specially designed for the mIC and encoded based on the iSP 8B/9B encoding protocol.

In one embodiment, the plurality of commands include a first pulse width modulation command (PWM1 command) and a broadcast command (Broadcast command). The first pulse width modulation command (PWM1 command) plus the broadcast command (Broadcast command) can achieve the backlight display effect of scan mode (Scan mode).

In one embodiment, the plurality of commands include a second pulse width modulation command (PWM2 command), which can achieve a direct mode backlight display effect.

In one embodiment, the plurality of commands include backlight (BAC) commands and registration (RRG) commands. The backlight command plus the registration command can be used to set the registration (register) of the (m*n) mICs.

In one embodiment, the plurality of instructions include backlight instructions and ID assignment instructions. The backlight command plus the identification assignment command can be used to assign different IDs to different mICs, and then set different registrations for different mICs.

Another preferred embodiment according to the present invention is a control method for mini light-emitting diode (mLED) backlight area dimming. In this embodiment, the control method of mLED backlight area dimming is applied to the mLED backlight system. The mLED backlight system includes a backlight control circuit and a backlight module. The backlight module includes (m*n) mICs and (m*n*p) mini light-emitting diodes arranged in series and parallel. The (m*n) mICs are divided into m groups of mICs and each group of mICs includes n mICs, where m, n, and p are positive integers. The control method includes the following steps: the backlight control circuit outputs m sets of mini-light emitting diode driving integrated circuit (mIC) control signals through m transmission ports respectively, where each set of mIC control signals includes k parallel control signals and j series control signals. signals, and k and j are both positive integers; the n mICs are connected in series with each other to sequentially transmit the j series control signals and each mIC in the n mICs receives the k parallel control signals respectively; and the ( m*n) mICs control the (m*n*p) mini light-emitting diodes mLEDs to selectively emit light according to the m sets of mIC control signals to achieve local dimming of the backlight module.

In one embodiment, the control method further includes: when the j series control signals are sequentially transmitted to the last mIC among the n mICs, the last mIC returns the j series control signals to the backlight control. circuit and the j series control signals include feedback information.

In one embodiment, the j series control signals are used to transmit specific commands and feedback mechanisms and the k parallel control signals are used for data transmission and settings.

In one embodiment, the backlight control circuit generates the m sets of mIC control signals correspondingly according to the backlight control signal from the timing control circuit.

In one embodiment, the backlight control circuit outputs different m sets of mIC control signals through the m transmission ports, thereby changing the local dimming of the backlight module to present different backlight display effects.

In one embodiment, the different m sets of mIC control signals include a plurality of instructions specially designed for the mIC and encoded based on the iSP 8B/9B encoding protocol.

In one embodiment, the plurality of instructions include a first pulse width modulation instruction and a broadcast instruction. The first pulse width modulation command plus the broadcast command can achieve the backlight display effect of the scan mode (Scan mode).

In one embodiment, the plurality of instructions include a second pulse width modulation instruction, which can achieve a direct mode backlight display effect.

In one embodiment, the plurality of commands include backlight commands and registration commands. The backlight command plus the registration command can be used to set the registration (register) of the (m*n) mICs.

In one embodiment, the plurality of instructions include backlight instructions and ID assignment instructions. The backlight command plus the identification assignment command can be used to assign different identities to different mICs, and then set different registrations for different mICs.

Compared with the prior art, the mini LED backlight system and the mini LED backlight area dimming control method of the present invention adopt the instructions of the iSP 8b/9b coding protocol specially designed for the mini LED drive circuit. Different registers are set for different mini LED driving circuits to control the local dimming of the mini LED backlight to present different backlight display effects, thus effectively solving the problems encountered in the previous technology.

A preferred embodiment according to the present invention is a mini light-emitting diode backlight system. In this embodiment, the mini-LED backlight system is applied to a display device and may include a backlight control circuit and a backlight module. The mini LED backlight system sends different mIC control signals to multiple mICs on the backlight module through the backlight control circuit, thereby realizing local dimming of the backlight module and presenting different backlight display effects.

Please refer to Figure 1 and Figure 2. FIG. 1 is a schematic diagram of the mini-LED backlight system in this embodiment. FIG. 2 shows a schematic diagram of a backlight control circuit and (m*n) mini light-emitting diode driving circuits arranged in series and parallel.

As shown in Figure 1, the mini LED backlight system 1 includes a timing control circuit TCON, a backlight control circuit BCON and a backlight module BLM. The timing control circuit TCON is coupled to the backlight control circuit BCON and sends the backlight control signal SB to the backlight control circuit BCON. The backlight control circuit BCON is coupled to the backlight module BLM and generates a plurality of sets of mini-light emitting diode driving integrated circuit control signals MCS to the backlight module BLM according to the backlight control signal SB. The backlight module BLM includes a plurality of mini light-emitting diode driving integrated circuits mIC and a plurality of mini light-emitting diodes mLED. The plurality of mini light-emitting diode driving integrated circuits mIC are arranged in series and parallel.

In this embodiment, in the backlight module BLM, the twelve mini-LED driving integrated circuits mIC arranged in series and parallel can be divided into three columns, each column including four mini-LED driving ICs. Body circuit mIC. Among them, the four mini light-emitting diode driving integrated circuits mIC in the first column are connected in series to each other in the backlight control circuit BCON, and the four mini-light emitting diode driving integrated circuits mIC in the second column are also connected in series to each other in the backlight control circuit. The circuit BCON and the four mini light-emitting diode driving integrated circuits mIC in the third column are also connected in series to the backlight control circuit BCON. Each mini-light-emitting diode driving integrated circuit mIC is coupled to 16 mini-light-emitting diodes mLEDs. That is, the backlight module BLM includes a total of (16*12)=192 mini light-emitting diodes mLEDs, but is not limited to this.

As shown in Figure 2, the backlight control circuit BCON includes m transmission ports P1~Pm. The backlight control circuit BCON outputs m sets of mini light-emitting diode driving integrated circuit (mIC) control signals MCS1~MCSm through m transmission ports P1~Pm respectively. Each set of mIC control signals (such as the first set of mini-light emitting diodes) The volume driver integrated circuit control signals MCS1) all include k parallel control signals and j series control signals, and m, k, and j are all positive integers.

The backlight module BLM includes (m*n) mini light-emitting diode driving integrated circuits mIC11~mICnm arranged in series and parallel, and n is a positive integer. Each mini light-emitting diode driving integrated circuit mIC is coupled to p mini-light emitting diodes mLED (p is a positive integer, not shown in the figure). (m*n) mini LED driving integrated circuits mIC11~mICnm are divided into m groups of mini LED driving integrated circuits and each group of mini LED driving integrated circuits includes n mini LEDs body driver integrated circuit. Among them, the first group of mini LED driving integrated circuits includes n mini LED driving integrated circuits mIC11~mICn1, and the second group of mini LED driving integrated circuits includes n mini LEDs. The driving integrated circuits mIC12~mICn2, ..., the m-th group of mini-light-emitting diode driving integrated circuits include n mini-light-emitting diode driving integrated circuits mIC1m~mICnm.

The m transmission ports P1~Pm of the backlight control circuit BCON are respectively coupled to m sets of mini light-emitting diode driving integrated circuits to respectively output m sets of mini light-emitting diode driving integrated circuit control signals MCS1~MCSm to m sets of mini-LED driving integrated circuits. Light emitting diode driver integrated circuit.

Taking the first transmission port P1 as an example, the first group of mini-LED driving integrated circuit control signals MCS1 output by the first transmission port P1 includes k parallel control signals and j series control signals. The first group of mini-LED driving integrated circuit control signals MCS1 The n mini light-emitting diode driving integrated circuits mIC11~mICn1 of the diode driving integrated circuit are connected in series with each other to sequentially transmit the j series control signals and the n mini-light emitting diode driving integrated circuits mIC11~ Each mini-LED driving integrated circuit in mICn1 receives the k parallel control signals respectively. Thereby, the n mini light-emitting diode driving integrated circuits mIC11~mICn1 of the first group of mini-light-emitting diode driving integrated circuits can be controlled according to k of the first group of mini-light-emitting diode driving integrated circuit control signals MCS1. Parallel control signals and j series control signals respectively control the p mini light-emitting diodes mLEDs coupled to each mini-light-emitting diode driving integrated circuit to selectively emit light to achieve regional modulation of the backlight module. Light (Local diming). In addition, when j series control signals are sequentially transmitted to the last mini-LED driving integrated circuit mICn1 among the n mini-LED driving integrated circuits mIC11~mICn1, the mini-LED driving The integrated circuit mICn1 will return the j series control signals to the backlight control circuit BCON and the j series control signals may include feedback information, but is not limited to this.

Similarly, for the second transmission port P2, the second group of mini-LED driving integrated circuit control signals MCS2 output by the second transmission port P2 includes k parallel control signals and j series control signals. The second group The n mini light-emitting diode driving integrated circuits mIC12~mICn2 of the mini-light-emitting diode driving integrated circuit are connected in series with each other to sequentially transmit the j series control signals and the n mini-light-emitting diode driving integrated circuits Each mini light-emitting diode driving integrated circuit in mIC12~mICn2 receives the k parallel control signals respectively. Thereby, the n mini light-emitting diode driving integrated circuits mIC12~mICn2 of the second group of mini-light-emitting diode driving integrated circuits can be controlled according to k of the second group of mini-light-emitting diode driving integrated circuit control signals MCS2. Parallel control signals and j series control signals respectively control the p mini light-emitting diodes mLEDs coupled to each mini-light-emitting diode driving integrated circuit to selectively emit light to achieve regional modulation of the backlight module. Light. In addition, when j series control signals are sequentially transmitted to the last mini-LED driving integrated circuit mICn2 among the n mini-LED driving integrated circuits mIC12~mICn2, the mini-LED driving The integrated circuit mICn2 will return the j series control signals to the backlight control circuit BCON and the j series control signals may include feedback information, but is not limited to this. The rest can be deduced in this way until the last m-th transmission port Pm.

For the m-th transmission port Pm, the m-th group of mini-LED driving integrated circuit control signals MCSm output by the m-th transmission port Pm includes k parallel control signals and j series control signals. The m-th group of mini-LED driving integrated circuit control signals MCSm The n mini light-emitting diode driving integrated circuits mIC1m~mICnm of the polar body driving integrated circuit are connected in series with each other to sequentially transmit the j series control signals and the n mini-light emitting diode driving integrated circuits mIC1m~mICnm Each of the mini light-emitting diode driving integrated circuits receives the k parallel control signals respectively. Thereby, the n mini-LED driving integrated circuits mIC1m~mICnm of the m-th group of mini-LED driving integrated circuits can be controlled according to k of the m-th group of mini-LED driving integrated circuit control signals MCSm. Parallel control signals and j series control signals respectively control the p mini light-emitting diodes mLEDs coupled to each mini-light-emitting diode driving integrated circuit to selectively emit light to achieve regional modulation of the backlight module. Light. In addition, when j series control signals are sequentially transmitted to the last mini-LED driving integrated circuit mICnm among the n mini-LED driving integrated circuits mIC12~mICnm, the mini-LED driving The integrated circuit mICnm will return the j series control signals to the backlight control circuit BCON and the j series control signals may include feedback information, but is not limited to this.

It should be noted that the j series control signals included in each group of mIC control signals MCS1~MCSm can be used to transmit specific instructions and feedback mechanisms, and the k parallel control signals included in each group of mIC control signals MCS1~MCSm can be used for data transmission and settings, but not limited to this.

In practical applications, the backlight control circuit BCON can output different m sets of mIC control signals MCS1~MCSm to the m sets of mini light-emitting diode driving integrated circuits of the backlight module BLM through the m transmission ports P1~Pm, thereby changing The regional dimming of the backlight module BLM presents different backlight display effects, but is not limited to this.

In a preferred embodiment of the present invention, the m sets of mIC control signals MCS1 ~ MCSm may include a plurality of instructions encoded based on the iSP 8B/9B encoding protocol specially designed for mini light-emitting diode driving integrated circuits. , to achieve different functions/effects, but not limited to this.

Table I instruction iSP 8B/9B encoding command description MSB LSB BAC 9'b0_0001_1110 Start of Line DP1 9'b0_0001_1001 Data of PWM DP2 9'b1_1110_0110 Data of PWM REG 9'b1_1000_0001 Register BDC 9'b1_1110_1110 Broadcast IDA 9'b0_0001_0001 ID assign EOL 9'b0_0111_1110 End of line

MSB (most significant bit) in Table 1 refers to the most significant bit and LSB (least significant bit) refers to the least significant bit.

For example, as shown in Table 1, the m sets of mIC control signals MCS1~MCSm may include a plurality of instructions BAC specially designed for mini light-emitting diode driving integrated circuits and encoded based on the iSP 8B/9B encoding protocol. DP1, DP2, REG, BDC, IDA, EOL, among which the command BAC represents the start of line (Start of Line), the commands DP1 and DP2 represent the data of pulse width modulation (DATA of PWM), the command REG represents registration (Register), The command BDC represents broadcast (Broadcast), the command IDA represents identification assignment (ID assign), and the command EOL represents the end of line (End of line), but is not limited to this.

In practical applications, different commands can be combined with each other to provide different functions/effects. For example:

(1) Please refer to Figure 3 to Figure 5. Assume that PWM1 is the first pulse width modulation command. It can receive data but does not output a pulse width modulation signal. It will not output a pulse width modulation signal until the broadcast command BDC is issued. This is used to achieve the backlight display effect of Scan mode, but is not limited to this.

(2) Please refer to Figure 6 to Figure 7. Assuming that PWM2 is the second pulse width modulation command, it can receive data and output pulse width modulation signals to achieve the backlight display effect of direct mode (Direct mode), but it cannot This is the limit.

(3) Please refer to Figure 8. Assuming that BKL is a backlight command, it plus the registration command REG can be used to set the registration (register) of the (m*n) mini light-emitting diode driving integrated circuits mIC11~mICnm, for example If the ID of the mini LED driving integrated circuit is 8'b0000_0000, the registration instruction REG is set to global register; conversely, if the ID of the mini LED driving integrated circuit is not 8'b0000_0000, Then the registration instruction REG is set to local register (local register), but it is not limited to this.

(4) Please refer to Figure 9. The backlight command BKL plus the identification assignment command IDA can be used to assign different IDs to the (m*n) mini light-emitting diode driving integrated circuits mIC11~mICnm, and then target different mini-light-emitting diodes. The diode driving integrated circuit sets different registrations. For example, if the identification ID_IC*X of the Xth mini LED driving integrated circuit is equal to the identification ID_IC*Y of the Yth mini LED driving integrated circuit, Then the identification assignment instruction IDA will assign the identification; on the contrary, if the identification ID_IC*X of the X-th mini-LED driving integrated circuit is not equal to the identification ID_IC*Y of the Y-th mini-LED driving integrated circuit, Then the identification assignment instruction IDA will not assign the identification, but this is not limited to this.

Another preferred embodiment according to the present invention is a control method for mini light-emitting diode (mLED) backlight area dimming. In this embodiment, the control method of mLED backlight area dimming is applied to the mLED backlight system. The mLED backlight system includes a backlight control circuit and a backlight module. The backlight module includes (m*n) mICs and (m*n*p) mini light-emitting diodes arranged in series and parallel. The (m*n) mICs are divided into m groups of mICs and each group of mICs includes n mICs, where m, n, and p are positive integers.

Please refer to FIG. 10 , which illustrates a flow chart of a control method for mini-LED backlight area dimming in this embodiment. As shown in Figure 10, the control method for mini LED backlight area dimming may include the following steps:

Step S10: The backlight control circuit outputs m sets of mini-light emitting diode driving integrated circuit (mIC) control signals through m transmission ports respectively, where each set of mIC control signals includes k parallel control signals and j series control signals, and k and j are both positive integers;

Step S12: The n mICs are connected in series to each other to sequentially transmit the j series control signals and each mIC in the n mICs receives the k parallel control signals respectively; and

Step S14: The (m*n) mIC controls the (m*n*p) mini light-emitting diodes mLED to selectively emit light according to the m set of mIC control signals to achieve local dimming (Local) of the backlight module. diming).

In practical applications, the control method may also include the following steps: when the j series control signals are sequentially transmitted to the last mIC among the n mICs, the last mIC returns the j series control signals to The backlight control circuit and the j series control signals include feedback information, but are not limited to this.

In this embodiment, the backlight control circuit can correspondingly generate the m sets of mIC control signals according to the backlight control signal from the timing control circuit, but is not limited to this; each set of mIC control signals includes the j series control signals It can be used to transmit specific instructions and feedback mechanisms, and the k parallel control signals included in each set of mIC control signals can be used for data transmission and settings, but is not limited to this.

It should be noted that the backlight control circuit can output different m sets of mIC control signals through the m transmission ports to change the local dimming of the backlight module to present different backlight display effects, but is not limited to this. Among them, different m sets of mIC control signals may include a plurality of instructions specially designed for mIC and encoded based on the iSP 8B/9B encoding protocol, but are not limited to this.

In addition, the plurality of instructions specially designed for mIC and encoded based on the iSP 8B/9B encoding protocol can include various instructions to achieve different functions/effects, such as:

(1) The plurality of commands may include the first pulse width modulation command PWM1 and the broadcast command BDC. The first pulse width modulation command PWM1 plus the broadcast command BDC can achieve the backlight display effect of the scan mode (Scan mode), but it is not limited to this.

(2) The plurality of instructions include a second pulse width modulation instruction PWM2, which can achieve a direct mode backlight display effect, but is not limited to this.

(3) The plurality of instructions include the backlight instruction BKL and the registration instruction REG. The backlight command BKL plus the registration command REG can be used to set the registration of the (m*n) mICs, but it is not limited to this.

(4) The plurality of instructions include the backlight instruction BKL and the identification assignment instruction ID A. The backlight command BKL plus the identification assignment command IDA can be used to assign different identifications to different mICs, and then set different registrations for different mICs, but it is not limited to this.

Compared with the prior art, the mini LED backlight system and the mini LED backlight area dimming control method of the present invention adopt the instructions of the iSP 8b/9b coding protocol specially designed for the mini LED drive circuit. Different registrations are set for different mini-LED driving circuits to control the local dimming of the mini-LED backlight to present different backlight display effects, thus effectively solving the problems encountered in the previous technology.

1:Mini LED backlight system TCON: timing control circuit BCON: backlight control circuit BLM: backlight module SB: backlight control signal MCS: Mini LED driver integrated circuit control signal mIC: mini light-emitting diode driver integrated circuit mLED: mini light-emitting diode P1~Pm: transmission port mIC11~mICnm: Mini LED driver integrated circuit MCS1~MCSm: Mini LED driver integrated circuit control signal k: the number of parallel control signals j: number of series control signals 8B:iSP 8B encoding protocol 9B:iSP 9B encoding protocol MSB: most significant bit LSB: least significant bit DATA:data BAC: Backlight command DP1~DP2: Data instructions for pulse width modulation CRC: Cyclic redundancy check (Cyclic redundancy check) command EOL: end of line command CH1: first channel CH2: Second channel PWM: pulse width modulation command BDC: broadcast command PWM1: The first pulse width modulation command PWM2: The second pulse width modulation command REG: Registration command REG1~REGN: registration instructions IDA: Identification Assignment Instructions IDX, IDY: identification Dither: dither SKEW: Skew IC1~IC2: integrated circuit S10~S14: Steps

FIG. 1 is a schematic diagram of a mini-LED backlight system according to a preferred embodiment of the present invention.

FIG. 2 is a schematic diagram of a backlight control circuit coupled to (m*n) mini light-emitting diode driving circuits arranged in series and parallel.

Figures 3 to 5 show that the first pulse width modulation command can receive data but does not output a pulse width modulation signal. The pulse width modulation signal is not output until the broadcast command is issued to achieve the backlight display effect of the scan mode (Scan mode). timing diagram.

6 and 7 illustrate timing diagrams in which the second pulse width modulation command can receive data and output a pulse width modulation signal to achieve a backlight display effect in direct mode.

FIG. 8 shows a timing diagram of a backlight command plus a registration command used to set the register of the plurality of mini-LED driving integrated circuits.

FIG. 9 illustrates a timing diagram of a backlight command plus an identification assignment command used to assign different IDs to a plurality of mini LED driving integrated circuits.

FIG. 10 is a flow chart illustrating a control method for mini-LED backlight area dimming according to another preferred embodiment of the present invention.

S10~S14: Steps

Claims (20)

A mini light-emitting diode (mLED) backlight system including: A backlight control circuit outputs m sets of mini-LED driving integrated circuit (mIC) control signals through m transmission ports respectively, wherein each set of mini-LED driving IC control signals includes k parallel control signals and j series control signals, and m, k, j are all positive integers; and A backlight module coupled to the backlight control circuit includes: (m*n) mini light-emitting diode driving integrated circuits are arranged in series and parallel. The (m*n) mini light-emitting diode driving integrated circuits are divided into m groups of mini light-emitting diode driving integrated circuits. circuit, and each group of mini light-emitting diode driving integrated circuits includes n mini-light-emitting diode driving integrated circuits, and the n mini-light-emitting diode driving integrated circuits are connected in series with each other to sequentially transmit the j series control signal and each mIC in the n mICs respectively receives the k parallel control signals, where n is a positive integer; and (m*n*p) mini light-emitting diodes (mLEDs) are respectively coupled to the (m*n) mini-LED driving integrated circuits, and the (m*n) mini-LED driving ICs The integrated circuit controls the (m*n*p) mini light-emitting diodes mLED to selectively emit light according to the m sets of mini-light-emitting diode drive integrated circuit control signals to achieve regional dimming of the backlight module ( Local diming), where p is a positive integer. The mini-LED backlight system as claimed in claim 1, wherein when the j series control signals are sequentially transmitted to the last mini-LED driver in the n mini-LED driver integrated circuits, In the integrated circuit, the last mini-LED driving integrated circuit transmits the j series control signals back to the backlight control circuit and the j series control signals include feedback information. The mini light-emitting diode backlight system as described in claim 1, wherein the j series control signals are used to transmit specific instructions and return mechanisms, and the k parallel control signals are used for data transmission and settings. The mini LED backlight system as claimed in claim 1, wherein the backlight control circuit generates the m sets of mini LED driving integrated circuit control signals in response to a backlight control signal from the timing control circuit. The mini LED backlight system as described in claim 1, wherein the backlight control circuit outputs different m sets of mini LED driving integrated circuit control signals through the m transmission ports, thereby changing the backlight module Regional dimming to present different backlight display effects. The mini-LED backlight system as described in claim 5, wherein the different m sets of mini-LED driving integrated circuit control signals include specially designed iSP 8B/ A plurality of instructions encoded in the 9B encoding protocol. The mini light-emitting diode backlight system as claimed in claim 6, wherein the plurality of instructions include a first pulse width modulation instruction and a broadcast instruction. The first pulse width modulation instruction plus the broadcast instruction can achieve scanning. The backlight display effect of Scan mode. The mini-LED backlight system of claim 6, wherein the plurality of instructions include a second pulse width modulation instruction, which can achieve a direct mode backlight display effect. The mini-LED backlight system as described in claim 6, wherein the plurality of instructions include a backlight instruction and a registration instruction, and the backlight instruction plus the registration instruction can be used to set the (m*n) mini-LEDs. Registration of polar body driver integrated circuits. The mini-LED backlight system as claimed in claim 6, wherein the plurality of instructions include a backlight instruction and an identification assignment (ID assignment) instruction, and the backlight instruction plus the ID assignment instruction can be used to assign different identities to Different mini light-emitting diode driving integrated circuits set different registrations for different mini-light-emitting diode driving integrated circuits. A control method for mini light-emitting diode (mLED) backlight area dimming, applied to a mini light-emitting diode backlight system. The mini light-emitting diode backlight system includes a backlight control circuit and a backlight module. The backlight module The group includes (m*n) mini light-emitting diode driving integrated circuits (mICs) and (m*n*p) mini-light-emitting diodes arranged in series and parallel. The (m*n) mini-light-emitting diodes The pole driver integrated circuit is divided into m groups of mini light-emitting diode driver integrated circuits, and each group of mini-light-emitting diode driver integrated circuits includes n mini-light-emitting diode driver integrated circuits, where m, n, p is a positive integer, the control method includes the following steps: The backlight control circuit outputs m sets of mini-LED driving IC control signals through m transmission ports respectively, wherein each group of mini-LED driving IC control signals includes k parallel control signals and j series control signals. signal, and k and j are both positive integers; The n mini LED driving integrated circuits are connected in series with each other to sequentially transmit the j series control signals and each mini LED driving IC in the n mini LED driving integrated circuits The circuit receives the k parallel control signals respectively; and The (m*n) mini-LED driving integrated circuits control the (m*n*p) mini-LEDs to selectively emit light according to the m sets of mini-LED driving IC control signals. , to achieve local dimming of the backlight module. The control method as described in request item 11 also includes: When the j series control signals are sequentially transmitted to the last mini-LED driving IC among the n mini-LED driving ICs, the last mini-LED driving IC The circuit returns the j series control signals to the backlight control circuit and the j series control signals include feedback information. The control method as described in claim 11, wherein the j series control signals are used to transmit specific instructions and feedback mechanisms and the k parallel control signals are used for data transmission and settings. The control method as claimed in claim 11, wherein the backlight control circuit generates the m sets of mini light-emitting diode driving integrated circuit control signals in response to a backlight control signal from the timing control circuit. The control method as described in claim 11, wherein the backlight control circuit outputs different m sets of mini-LED driving integrated circuit control signals through the m transmission ports, thereby changing the regional dimming of the backlight module. Present different backlight display effects. The control method as described in claim 15, wherein the different m sets of mini-LED driving integrated circuit control signals include codes based on the iSP 8B/9B encoding protocol specially designed for the mini-LED driving integrated circuit. A plurality of instructions. The control method as claimed in claim 16, wherein the plurality of instructions include a first pulse width modulation instruction and a broadcast instruction, and the first pulse width modulation instruction plus the broadcast instruction can achieve the scan mode (Scan mode) backlight display effect. The control method as described in claim 16, wherein the plurality of instructions includes a second pulse width modulation instruction, which can achieve a direct mode backlight display effect. The control method as described in claim 16, wherein the plurality of instructions include a backlight instruction and a registration instruction, and the backlight instruction plus the registration instruction can be used to set the (m*n) mini-light emitting diode driving components. Registration of circuits. The control method as claimed in claim 16, wherein the plurality of instructions include a backlight instruction and an identification assignment instruction, and the backlight instruction plus the identification assignment instruction can be used to assign different identifications to different mini-LED driving products. integrated circuit, and then set different registrations for different mini-LED driving integrated circuits.

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