Backlight control circuit, backlight module, and display apparatus

Abstract

A backlight control circuit, a backlight module, and a display apparatus, which relate to the technical field of display. The backlight control circuit is used for controlling a backlight lamp panel to emit light. The backlight lamp panel comprises a plurality of lamp areas. The backlight control circuit comprises: a plurality of driving chips, each driving chip comprising a first input end and a plurality of gating output ends, each driving chip being used for generating a plurality of first gating signals on the basis of a first control signal input from the first input end, and the gating output ends being used for outputting the first gating signals; and a gating circuit, comprising a plurality of gating sub-circuits, the gating sub-circuits being respectively connected to corresponding gating output ends and lamp areas and being used for adjusting the brightness of the lamp areas on the basis of the first gating signals.

Description

Backlight control circuit, backlight module and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a backlight control circuit, a backlight module, and a display device. Background Art

[0002] Dynamic backlight control technology has gradually become the mainstream of research and application in the field of LCD TVs due to its significant features such as energy saving and improved contrast.

[0003] Overview

[0004] The present disclosure provides a backlight control circuit for controlling a backlight panel to emit light, wherein the backlight panel includes a plurality of light zones, and the backlight control circuit includes:

[0005] A plurality of driver chips, each comprising a first input terminal and a plurality of strobe output terminals, wherein the driver chip is configured to generate a plurality of first strobe signals according to a first control signal inputted from the first input terminal, and the strobe output terminals are configured to output the first strobe signals;

[0006] The gating circuit includes a plurality of sub-gating circuits, each of which is connected to a corresponding gating output terminal and a light zone, and is used to adjust the brightness of the light zone according to the first gating signal.

[0007] In some embodiments, the driver chip further includes a signal acquisition terminal; and the sub-gating circuit includes:

[0008] a first transistor, a control electrode connected to the strobe output terminal, a first electrode connected to the signal acquisition terminal, and a second electrode connected to the lamp area;

[0009] The driver chip is further configured to adjust the first selection signal according to the signal collected by the signal collection terminal.

[0010] In some embodiments, the driver chip further includes:

[0011] a second input terminal for receiving a clock signal, wherein the driver chip is further configured to generate the plurality of first selection signals according to the first control signal and the clock signal;

[0012] a third input terminal, for receiving a second selection signal, wherein the second selection signal is used to control the working state of the driver chip;

[0013] The first input terminals of the plurality of driver chips are connected in series, the second input terminals of the plurality of driver chips are connected in parallel, and the third input terminals of the plurality of driver chips are connected in parallel.

[0014] In some embodiments, the backlight control circuit further includes:

[0015] a plurality of motherboard interfaces, wherein the first input end, the second input end, and the third input end are respectively connected to different motherboard interfaces;

[0016] The processing circuit is arranged between the mainboard interface and the first input end, the second input end and the third input end, and is used for enhancing and / or filtering the input signal.

[0017] In some embodiments, the backlight control circuit further includes:

[0018] The mounting area includes multiple sub-areas, each of which is used to mount a connector, and each of which is used to connect the sub-enabling circuit and the lamp area. The multiple sub-areas include a first sub-area and a second sub-area, and the number of sub-enabling circuits connected to the first sub-area is different from the number of sub-enabling circuits connected to the second sub-area.

[0019] In some embodiments, the plurality of mounting areas are disposed on two opposite sides of the driver chip, and the plurality of mounting areas located on the same side of the driver chip are separated from each other.

[0020] In some embodiments, the number of sub-gating circuits connected to the first sub-region is equal to an integer multiple of the number of sub-gating circuits connected to the second sub-region.

[0021] In some embodiments, the plurality of driver chips include:

[0022] a first driver chip connected to the first sub-region via a corresponding sub-gating circuit;

[0023] a second driving chip connected to the second sub-region via a corresponding sub-selection circuit;

[0024] Wherein, the plurality of second driving chips are dispersedly arranged among the plurality of first driving chips.

[0025] In some embodiments, the second sub-region is located on a side of the first sub-region close to the driving chip.

[0026] In some embodiments, the backlight control circuit further includes:

[0027] A first connector, mounted on the first sub-area, for connecting a first number of light zones; or

[0028] The second connector is mounted on the second sub-area and is used to connect a second number of light zones, where the second number is different from the first number.

[0029] In some embodiments, the light area includes a light emitting device, and the sub-area:

[0030] A positive electrode pin, used to connect to the power interface and the positive electrode of the light emitting device; and

[0031] A cathode pin, used for connecting the sub-selection circuit and the cathode of the light-emitting device;

[0032] Wherein, the positive electrode pin and the negative electrode pin are arranged nearby.

[0033] In some embodiments, the driver chip further includes a voltage input terminal; and the backlight control circuit further includes:

[0034] The sleep control circuit is connected to the control terminal, the power supply terminal and the voltage input terminal of the driver chip respectively, and is used to control the conduction or disconnection between the power supply terminal and the voltage input terminal according to the sleep control signal input from the control terminal.

[0035] In some embodiments, the sleep control circuit includes: an amplification module and a switch module;

[0036] The amplifying module is connected to the control terminal and the switch module respectively, and is used to amplify the sleep control signal and output the amplified sleep control signal to the switch module;

[0037] The switch module is connected to the power supply end and the voltage input end respectively, and is used to control the conduction or disconnection between the power supply end and the voltage input end according to the amplified sleep control signal.

[0038] In some embodiments, the sleep control circuit further includes at least one of the following:

[0039] a voltage stabilizing module connected between the control terminal and the amplifying module, and configured to stably input the sleep control signal to the amplifying module; and

[0040] The filtering module is connected between the amplifying module and the switching module, and is used for filtering the amplified sleep control signal.

[0041] In some embodiments, the amplification module includes:

[0042] a second transistor, having a control electrode connected to the control terminal, a first electrode connected to the ground, and a second electrode connected to the switch module;

[0043] The switch module includes:

[0044] A third transistor has a control electrode connected to the amplification module, a first electrode connected to the power supply end, and a second electrode connected to the voltage input end.

[0045] The present disclosure provides a backlight module, comprising:

[0046] A backlight control circuit as described in any one of the preceding claims; and

[0047] The backlight panel comprises a plurality of light areas, wherein the light areas are connected to the sub-gating circuit and are used for emitting light under the control of the sub-gating circuit.

[0048] The present disclosure provides a display device, comprising:

[0049] display panel; and

[0050] The backlight module as described in any one of the items is arranged on the light incident side of the display panel, and is used to provide backlight to the display panel.

[0051] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below.

[0052] BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or related technologies, the following is a brief introduction to the drawings required for the description of the embodiments or related technologies. Obviously, the drawings described below are some embodiments of the present disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without inventive efforts. It should be noted that the scales in the drawings are for illustration only and do not represent the actual scale.

[0054] FIG1 exemplarily shows a structural diagram of a backlight driving circuit provided by the present disclosure;

[0055] FIG2 exemplarily shows a structural diagram of a driver chip;

[0056] FIG3 exemplarily shows a connection structure diagram between multiple driver chips;

[0057] FIG4 exemplarily shows a structural diagram of a processing circuit;

[0058] FIG5 exemplarily shows a structural diagram of a mounting area;

[0059] FIG6 exemplarily shows a structural diagram of a backlight driving circuit on a printed circuit board;

[0060] FIG7 exemplarily shows a structural diagram of a sleep control circuit;

[0061] FIG8 exemplarily shows a connection structure diagram between a gating circuit, a mounting area, and a power interface;

[0062] FIG. 9 exemplarily shows a connection structure diagram around a driver chip.

[0063] Detailed description

[0064] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0065] The present disclosure provides a backlight control circuit for controlling the illumination of a backlight panel, the backlight panel including a plurality of LEDs in a light zone. As shown in FIG1 , the backlight control circuit includes: a plurality of driver ICs, each including a first input terminal MOSI and a plurality of strobe output terminals G, the driver ICs being configured to generate a plurality of first strobe signals based on a first control signal inputted from the first input terminal MOSI, the strobe output terminals G being configured to output the first strobe signals; and a strobe circuit 11 including a plurality of sub-strobe circuits 12, each of the sub-strobe circuits 12 being connected to corresponding strobe output terminals G and the light zone LEDs, and configured to adjust the brightness of the light zone LEDs based on the first strobe signals.

[0066] In the present disclosure, each sub-gating circuit 12 adjusts the brightness of the LED in the lamp zone connected to the output terminal of the sub-gating circuit 12 based on the first gating signal outputted by the gating output terminal G connected to the sub-gating circuit 12. For example, the sub-gating circuit 12 in the dashed box in FIG1 is connected to the gating output terminal G1-2 and the LED in the lamp zone O1B. The sub-gating circuit 12 adjusts the brightness of the LED in the lamp zone O1B based on the first gating signal outputted by the gating output terminal G1-2.

[0067] The backlight control circuit provided by the present invention adopts a solution of an external selection circuit 11 in the driver chip IC. Compared with the solution of a built-in selection circuit 11 in the driver chip IC, the switching power threshold of the sub-selection circuit 12 can be increased, the heat dissipation efficiency can be improved, and the device cost can be reduced. At the same time, the compatibility with the backlight area LED can be improved, and it has higher load adaptability of the light area LED and better current carrying capacity, which increases the selectable range of parameters such as the driving voltage and current of the light strip in the backlight panel, and simplifies the expansion of the light area LED.

[0068] Among them, the sub-selection circuit 12 can independently control the brightness of each light zone LED, realizing dynamic load control of a single light zone LED, thereby realizing local backlight adjustment of the backlight panel. In a specific implementation, the brightness of the corresponding light zone LED can be adjusted according to the brightness of the displayed image. The brightness of the light zone LED corresponding to the highlighted area of ​​the displayed image can be increased, while the brightness of the light zone LED corresponding to the dark area of ​​the displayed image can be reduced or even turned off to improve the contrast of the displayed image. In addition, by adjusting the local backlight of the backlight panel, the sensitivity to the brightness uniformity of the backlight panel can be reduced, and power consumption can also be reduced.

[0069] For example, as shown in FIG2 , a driver IC includes 16 strobe outputs G, such as G1-1 through G1-16. These 16 strobe outputs G can be connected to 16 sub-strobe circuits 12, thereby achieving dynamic on / off control of 16 LED zones. To enable the backlight control circuit to simultaneously drive 80 LED zones, the backlight control circuit can include five driver ICs as shown in FIG2 , for a total of 80 strobe outputs G. These 80 strobe outputs G can be connected to 80 sub-strobe circuits 12, thereby achieving driving of 80 LED zones. The strobe outputs G, sub-strobe circuits 12, and LED zones are connected in a one-to-one correspondence.

[0070] In some embodiments, as shown in FIG2 , the driver chip IC further includes a signal acquisition terminal S, which is connected to the sub-selection circuit 12 and is configured to acquire the electrical signal used by the sub-selection circuit 12 to drive the LEDs in the light zone to emit light. The driver chip IC is further configured to adjust the first selection signal based on the electrical signal acquired by the signal acquisition terminal S.

[0071] 2 , a driver chip IC includes 16 signal collection terminals S, such as S1 - 1 to S1 - 16 , and different sub-selection circuits 12 are connected to different signal collection terminals S.

[0072] For example, the driver chip IC has a built-in load current collector connected to the signal collection terminal S to realize the electrical signal collection function. For example, the driver chip IC can have 16 built-in load current collectors, thereby realizing the actual electrical signals corresponding to the 16 sub-selection circuits 12.

[0073] For each sub-selection circuit 12, the driver chip IC can dynamically adjust the first selection signal of the sub-selection circuit 12 according to the actual electrical signal (such as voltage signal or current signal) used by the sub-selection circuit 12 to drive the LED in the lamp area to emit light, so that the first selection signal dynamically controls the sub-selection circuit 12.

[0074] In some embodiments, as shown in FIG1 , the sub-selection circuit 12 includes: a first transistor Q (Q42A, Q42B, Q43A, and Q43B as shown in FIG1 ), a control electrode connected to the selection output terminal G, a first electrode connected to the signal acquisition terminal S, and a second electrode connected to the light area LED.

[0075] For example, the signal acquisition terminal S can collect the voltage across the first pole's resistance to ground, allowing the driver IC to perform feedback regulation on the current in the sub-gating circuit 12 based on this voltage. The signal acquisition terminal S measures the actual current signal generated by the sub-gating circuit 12 driving the LEDs in the light zone to emit light, based on the voltage across the first pole's resistance to ground. The driver IC then performs feedback regulation on the current in the sub-gating circuit 12 based on this current signal.

[0076] Exemplarily, the first transistor Q is a Dual-N MOS transistor.

[0077] In a specific implementation, the driver IC can also determine the minimum steady-state operating voltage of all sub-selector circuits 12 when operating at a preset current value. If the actual total output voltage does not meet the minimum steady-state operating voltage, the driver IC will increase the total output voltage of the power supply via its FB pin. Furthermore, if the driver IC operates abnormally, an alarm can be output via the FAULT pin, which can identify abnormal operating conditions of the driver IC.

[0078] Exemplarily, the driver chip IC uses a dedicated backlight driver IC AS3824.

[0079] In some embodiments, as shown in FIG. 2 or FIG. 3 , the driver chip IC further includes: a second input terminal SCK for receiving a clock signal. The driver chip IC is further configured to generate a plurality of first selection signals according to the first control signal and the clock signal.

[0080] In some embodiments, the driver chip IC further includes a third input terminal CSB for receiving a second selection signal for controlling the working state of the driver chip IC. The second selection signal is used to select some or all of the driver chip ICs from the plurality of driver chip ICs for operation.

[0081] Exemplarily, as shown in FIG3 , the first input terminals MOSI of multiple driver chip ICs are connected in series, the second input terminals SCK of multiple driver chip ICs are connected in parallel, and the third input terminals CSB of multiple driver chip ICs are connected in parallel.

[0082] In some embodiments, as shown in FIG. 3 , the backlight control circuit further includes: a plurality of motherboard interfaces 31 , and the first input terminal MOSI, the second input terminal SCK, and the third input terminal CSB are connected to different motherboard interfaces 31 , respectively.

[0083] 3 , the plurality of motherboard interfaces 31 include a first motherboard interface 311, a second motherboard interface 312, a third motherboard interface 313, and a fourth motherboard interface 314. The first input terminals MOSI of the plurality of driver chip ICs are sequentially connected in series between the first motherboard interface 311 and the fourth motherboard interface 314. The first motherboard interface 311 is configured to provide a first control signal.

[0084] Exemplarily, as shown in Figure 3, the driver chip IC also includes a series output terminal MISO. For multiple driver chip ICs connected in series, the first input terminal MOSI of the first driver chip IC is connected to the first motherboard interface 311, the series output terminal MISO of the previous driver chip IC is connected to the first input terminal MOSI of the next driver chip IC, and the series output terminal MISO of the last driver chip IC is connected to the fourth motherboard interface 314.

[0085] 3 , the second input terminals SCK of the plurality of driver ICs are all connected to the same second motherboard interface 312 , and the third input terminals CSB of the plurality of driver ICs are all connected to the same third motherboard interface 313 .

[0086] In some embodiments, as shown in FIG3 , the backlight control circuit further includes: a processing circuit 32 , which is disposed between the mainboard interface 31 and the first input terminal MOSI, the second input terminal SCK, and the third input terminal CSB, and is configured to enhance and / or filter the input signal.

[0087] In this way, the SPI signal input from the mainboard is filtered, shaped and level-converted after passing through the processing circuit 32, thereby ensuring stable communication between the mainboard and the driver chip IC. Among them, the SPI signal includes the signal input or output from the mainboard interface 31.

[0088] For example, as shown in FIG3 , a processing circuit 32 may be provided between the first motherboard interface 311 and the first input terminal MOSI, a processing circuit 32 may be provided between the second motherboard interface 312 and the second input terminal SCK, a processing circuit 32 may be provided between the third motherboard interface 313 and the third input terminal CSB, and a processing circuit 32 may be provided between the fourth motherboard interface 314 and the serial output terminal MISO.

[0089] For example, the processing circuit 32 may include a buffer chip and a MUC control chip to implement SPI signal relay. As shown in Figure 4, the processing circuit 32 includes a buffer chip UL3, a first capacitor CL10, and a second capacitor CL68. The node AS3824-SCK is connected to the driver chip IC, and the node LD-SPI-SCK is connected to the motherboard interface 31.

[0090] In some embodiments, as shown in Figure 5, the backlight control circuit also includes: a mounting area 50, including multiple sub-areas 51, the sub-areas 51 are used to mount connectors, the connectors are used to connect the sub-enabling circuits 12 and the light area LEDs, the multiple sub-areas 51 include a first sub-area 511 and a second sub-area 512, and the number of sub-enabling circuits 12 connected to the first sub-area 511 is different from the number of sub-enabling circuits 12 connected to the second sub-area 512.

[0091] Exemplarily, as shown in FIG5 , the sub-region 51 includes a cathode pin 53 , which is connected to the output end of the sub-selection circuit 12 in a one-to-one correspondence via a lead 54 , and the sub-selection circuit 12 is connected to the LED in the light region via the cathode pin 53 .

[0092] In FIG5 , the first sub-region 511 includes 20 cathode pins 53, so the number of sub-gating circuits 12 connected to the first sub-region 511 is 20. The second sub-region 512 includes 10 cathode pins 53, so the number of sub-gating circuits 12 connected to the second sub-region 512 is 10. The number of sub-gating circuits 12 connected to the first sub-region 511 is greater than the number of sub-gating circuits 12 connected to the second sub-region 512.

[0093] Because the sub-selection circuit 12 is connected to the LEDs in the light zones in a one-to-one correspondence, the first sub-area 511 and the second sub-area 512 can be used to mount different connectors, and different connectors can drive different numbers of light zones. Therefore, the mounting area 50 is compatible with a variety of light zones, allowing backlight control circuits for different numbers of light zones to share the same printed circuit board (PCB). In addition, by separately setting the first sub-area 511 and the second sub-area 512, the risk of misuse of the terminal board can be reduced. When unifying the external interface of the board, customized special-shaped FFC cables can achieve backward compatibility with the maximum number of LEDs in the light zones, thereby realizing a solution that uses a printed circuit board (PCB) for multiple LEDs in the light zones, enhancing material versatility and reducing usage costs.

[0094] The number of light zones refers to the number of LEDs in the light zones that can be driven simultaneously.

[0095] In some embodiments, the number of sub-gating circuits 12 connected to the first sub-region 511 is equal to an integer multiple of the number of sub-gating circuits 12 connected to the second sub-region 512 .

[0096] For example, as shown in FIG5 , the number of sub-enabling circuits 12 connected to the first sub-region 511 is 20, and the connectors mounted on the first sub-region 511 can realize the simultaneous driving of 20 LEDs in the light zone. The number of sub-enabling circuits 12 connected to the second sub-region 512 is 10, and the connectors mounted on the second sub-region 512 can realize the simultaneous driving of 10 LEDs in the light zone.

[0097] To improve heat dissipation efficiency and device reliability, in some embodiments, as shown in FIG6 , the plurality of driver chips IC include: a first driver chip IC1 connected to the first sub-region 511 via a corresponding sub-gating circuit 12; and a second driver chip IC2 connected to the second sub-region 512 via a corresponding sub-gating circuit 12. The plurality of second driver chips IC2 are dispersed among the plurality of first driver chips IC1.

[0098] For example, as shown in FIG6 , multiple first driver chips IC1 are arranged in multiple rows. At least one first driver chip IC1 may be provided between two second driver chips IC2 in the same row. Multiple second driver chips IC2 may also be provided in different rows.

[0099] To facilitate wiring, in some embodiments, as shown in FIG6 , the second sub-region 512 is located on a side of the first sub-region 511 close to the driver chip IC.

[0100] In order to improve the crimping reliability of the multi-pin connector and the convenience of subsequent assembly, in some embodiments, as shown in Figure 6, multiple mounting areas 50 are arranged on opposite sides of the driver chip IC, and multiple mounting areas 50 located on the same side of the driver chip IC are separated from each other.

[0101] Exemplarily, the backlight control circuit is disposed on a printed circuit board (PCB), and the mounting area 50 is disposed near an edge of the PCB. As shown in FIG6 , the backlight control circuit includes four mounting areas 50, located above and below the driver chip IC. Two mounting areas 50 are disposed near the top edge of the PCB, and the other two mounting areas 50 are disposed near the bottom edge of the PCB. The two mounting areas 50 disposed near the top edge are disposed near the top left and top right corners of the PCB, respectively, while the two mounting areas 50 disposed near the top edge are disposed near the bottom left and bottom right corners of the PCB, respectively.

[0102] Since in each mounting area 50, the number of sub-enabling circuits 12 connected to the first sub-area 511 is 20, and the number of sub-enabling circuits 12 connected to the second sub-area 512 is 10, the four mounting areas 50 can realize the simultaneous driving of 80 light zone LEDs and the simultaneous driving of 40 light zone LEDs.

[0103] In some embodiments, the backlight control circuit further includes: a first connector mounted on the first sub-area 511 for connecting a first number of light zone LEDs; or a second connector mounted on the second sub-area 512 for connecting a second number of light zone LEDs, the second number being different from the first number.

[0104] In a specific implementation, one type of connector can be mounted in one sub-area 51 within the mounting area 50, while the other sub-areas 51 are left blank. For example, if a first connector is mounted in the first sub-area 511, the second sub-area 512 is left blank; if a second connector is mounted in the second sub-area 512, the first sub-area 511 is left blank.

[0105] Exemplarily, both the first connector and the second connector are 60-pin connectors, which can improve the crimping reliability of the connectors.

[0106] In some embodiments, the lamp area LED includes a light-emitting device, as shown in Figures 5 and 8, and the sub-area 51 includes: a positive pin 52 for connecting to the power interface 80 and the positive pole of the light-emitting device; and a negative pin 53 for connecting the sub-selection circuit 12 and the negative pole of the light-emitting device.

[0107] In a specific implementation, as shown in FIG8 , current flows from the power interface 80 into the positive electrode of the light emitting device through the positive electrode pin 52 , and then flows from the negative electrode of the light emitting device into the sub-selection circuit 12 through the negative electrode pin 53 .

[0108] For example, the positive pin 52 and the negative pin 53 are arranged close to each other, for example, the number of pins arranged between the positive pin 52 and the negative pin 53 is less than or equal to 3. This is conducive to miniaturization of the printed circuit board PCB.

[0109] In some embodiments, as shown in FIG2 , the driver chip IC further includes a voltage input terminal VIN. As shown in FIG7 , the backlight control circuit further includes a sleep control circuit 70 , which is connected to the control terminal BL_ON, the power supply terminal 12V0, and the voltage input terminal VIN of the driver chip IC, respectively, and is configured to control the conduction or disconnection between the power supply terminal 12V0 and the voltage input terminal VIN according to a sleep control signal input from the control terminal BL_ON.

[0110] The sleep control circuit 70 is used to control the sleep state of the driver IC. When the power supply terminal 12V0 and the voltage input terminal VIN are connected, the sleep control circuit 70 is used to supply power to the driver IC, causing the driver IC to operate. When the power supply terminal 12V0 and the voltage input terminal VIN are disconnected, the driver IC is placed in a sleep standby state, thereby reducing power consumption.

[0111] In some embodiments, as shown in FIG7 , the sleep control circuit 70 includes an amplifier module 71 and a switch module 72. The amplifier module 71 is connected to the control terminal BL_ON and the switch module 72, respectively, for amplifying the sleep control signal and outputting the amplified sleep control signal to the switch module 72. The switch module 72 is connected to the power supply terminal 12V0 and the voltage input terminal VIN, respectively, for controlling the conduction or disconnection between the power supply terminal 12V0 and the voltage input terminal VIN according to the amplified sleep control signal.

[0112] In some embodiments, as shown in FIG. 7 , the sleep control circuit 70 may further include a voltage stabilizing module 73 connected between the control terminal BL_ON and the amplifying module 71 , configured to stably input the sleep control signal to the amplifying module 71 .

[0113] Exemplarily, the voltage stabilizing module 73 includes a resistor RL13 and a capacitor CL11 connected in parallel, which functions to stabilize the signal.

[0114] In some embodiments, as shown in FIG. 7 , the sleep control circuit 70 may further include a filtering module 74 connected between the amplifying module 71 and the switching module 72 , configured to filter the amplified sleep control signal.

[0115] Exemplarily, the filtering module 74 includes a resistor RL9 and a voltage-stabilizing diode DL1 connected in parallel, which play a filtering role.

[0116] In some embodiments, as shown in FIG. 7 , the amplifying module 71 includes: a second transistor QL2 , a control electrode of which is connected to the control terminal BL_ON, a first electrode of which is grounded, and a second electrode of which is connected to the switch module 72 .

[0117] In some embodiments, as shown in FIG. 7 , the switch module 72 includes: a third transistor QL1 , a control electrode of which is connected to the amplification module 71 , a first electrode of which is connected to the power supply terminal 12V0 , and a second electrode of which is connected to the voltage input terminal VIN.

[0118] Exemplarily, the resistor RL8 , the capacitor CL9 , and the capacitor CL8 connected to the third transistor QL1 function as a filter.

[0119] In some embodiments, as shown in FIG9 , the driver chip IC further includes: multiple input and output terminals, each of which is connected to a filter circuit comprising a capacitor and / or a resistor. This can improve the driver chip IC's operational sensitivity, enhance its ESD resistance, and significantly enhance its ability to withstand abnormal load fluctuations.

[0120] Exemplarily, as shown in FIG9 , the driver chip IC further includes: an input / output terminal VIN connected to a capacitor CL105 , and the capacitor CL105 functions as a power supply voltage stabilizer.

[0121] Exemplarily, as shown in FIG9 , the driver chip IC further includes: an output input terminal VDD3V3-1 connected to a capacitor CL106 , and the capacitor CL106 functions as a power supply voltage stabilizer.

[0122] Exemplarily, as shown in FIG9 , the driver chip IC further includes: an input / output terminal FB1 - 2 connected to a resistor RL627 , and the resistor RL627 plays a role in maintaining signal stability.

[0123] Exemplarily, as shown in FIG9 , the driver chip IC further includes: an input / output terminal FAULTB1 connected to a resistor RL628 , and the resistor RL628 plays a role in maintaining signal stability.

[0124] Exemplarily, as shown in FIG9 , the driver chip IC further includes: an input / output terminal VS connected to a capacitor CL104 and a resistor RL625 , and the capacitor CL104 and the resistor RL625 play a filtering role.

[0125] Exemplarily, as shown in FIG9 , the input / output terminal CSB, the input / output terminal MOSI, the input / output terminal SCK, and the input / output terminal MCU are respectively connected to respective filter circuits.

[0126] The present disclosure also provides a backlight module, comprising: a backlight control circuit as provided in any embodiment; and a backlight lamp panel, comprising a plurality of lamp areas, wherein the lamp areas are connected to the sub-enabling circuit and are configured to emit light under the control of the sub-enabling circuit.

[0127] Those skilled in the art will appreciate that the backlight module provided by the present disclosure has the advantages of the above-mentioned backlight control circuit.

[0128] Exemplarily, the light zone may include a plurality of light emitting devices, such as light emitting diodes and the like.

[0129] The present disclosure provides a display device, comprising: a display panel and a backlight module as provided in any embodiment. The backlight module is arranged on the light incident side of the display panel to provide backlight to the display panel.

[0130] Those skilled in the art will appreciate that the display device provided by the present disclosure has the advantages of the above-mentioned backlight module or backlight control circuit.

[0131] Exemplarily, the backlight module provides direct backlight for the display panel.

[0132] The display device provided herein may include any product or component with a display function, such as a display module, virtual reality glasses and other virtual display products, mobile phones, tablet computers, televisions, monitors, laptop computers, digital photo frames, in-vehicle display devices, smart watches, fitness wristbands, and personal digital assistants. The display panel may be, for example, a liquid crystal display panel.

[0133] In the present disclosure, “a plurality of” means two or more, and “at least one” means one or more, unless otherwise clearly defined.

[0134] In the present disclosure, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present disclosure.

[0135] As used herein, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, product, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, commodity, or apparatus that includes the element.

[0136] References herein to "one embodiment," "some embodiments," "exemplary embodiments," "one or more embodiments," "an example," "an example," "some examples," and the like are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any one or more embodiments or examples in any suitable manner.

[0137] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0138] When describing some embodiments, the expressions "coupled" and "connected" may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also mean that two or more components are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0139] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0140] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0141] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0142] The use of "for" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0143] The use of "based on" or "according to" in this document is intended to be open and inclusive. A process, step, calculation, or other action based on one or more stated conditions or values ​​may, in practice, be based on other conditions or values ​​beyond the stated values. A process, step, calculation, or other action based on one or more stated conditions or values ​​may, in practice, be based on other conditions or values ​​beyond the stated values.

[0144] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0145] As used herein, "parallel", "perpendicular", "equal", and "flush" include the situations described and situations similar to the situations described, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, the difference between the two being equal is less than or equal to 5% of either one. "Flush" includes absolute equality and approximate flushness, wherein the acceptable deviation range of approximate flushness can be, for example, the distance between the two being flush is less than or equal to 5% of either one's size.

[0146] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0147] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A backlight control circuit for controlling the backlight panel to emit light. The backlight panel includes multiple lamp areas. The backlight control circuit includes: Multiple driving chips. The driving chip includes a first input terminal and multiple gated output terminals. The driving chip is configured to generate multiple first gating signals according to a first control signal input to the first input terminal, and the gated output terminals are used to output the first gating signals; A gating circuit including multiple sub-gating circuits. The sub-gating circuits are respectively connected to the corresponding gated output terminals and the lamp areas, and are configured to adjust the brightness of the lamp areas according to the first gating signals.

2. The backlight control circuit according to claim 1, wherein, The driving chip further includes a signal acquisition terminal; the sub-gating circuit includes: A first transistor, whose control electrode is connected to the gated output terminal, a first pole is connected to the signal acquisition terminal, and a second pole is connected to the lamp area; Wherein, the driving chip is further configured to adjust the first gating signals according to the signals acquired by the signal acquisition terminal.

3. The backlight control circuit according to claim 1, wherein The driving chip further includes: A second input terminal for receiving a clock signal. The driving chip is further configured to generate the multiple first gating signals according to the first control signal and the clock signal; A third input terminal for receiving a second gating signal, and the second gating signal is used to control the working state of the driving chip; Wherein, the first input terminals of the multiple driving chips are connected in series in sequence, the second input terminals of the multiple driving chips are connected in parallel, and the third input terminals of the multiple driving chips are connected in parallel.

4. The backlight control circuit according to claim 3, wherein, The backlight control circuit further includes: Multiple main board interfaces. The first input terminal, the second input terminal, and the third input terminal are respectively connected to different main board interfaces; A processing circuit disposed between the main board interface and the first input terminal, the second input terminal, and the third input terminal, and configured to perform enhancement and / or filtering processing on the input signals.

5. The backlight control circuit according to claim 1, wherein, The backlight control circuit further includes: A mounting area including multiple sub-areas. The sub-areas are used to mount connectors, and the connectors are used to connect the sub-gating circuits and the lamp areas. The multiple sub-areas include a first sub-area and a second sub-area. The number of sub-gating circuits connected to the first sub-area is different from the number of sub-gating circuits connected to the second sub-area.

6. The backlight control circuit according to claim 5, wherein, The multiple mounting areas are disposed on opposite sides of the driving chip, and the multiple mounting areas located on the same side of the driving chip are separated from each other.

7. The backlight control circuit according to claim 5, wherein, The number of sub-gating circuits connected to the first sub-area is equal to an integer multiple of the number of sub-gating circuits connected to the second sub-area.

8. The backlight control circuit according to claim 7, wherein, The multiple driving chips include: A first driving chip connected to the first sub-area through a corresponding sub-gating circuit; A second driving chip connected to the second sub-area through a corresponding sub-gating circuit; Wherein, the multiple second driving chips are dispersedly disposed among the multiple first driving chips.

9. The backlight control circuit according to claim 7, wherein, The second sub-area is located on the side of the first sub-area close to the driving chip.

10. The backlight control circuit according to claim 5, wherein, The backlight control circuit further includes: A first connector mounted on the first sub-area for connecting a first number of lamp areas; or A second connector is mounted on the second sub-region for connecting a second number of light-emitting regions, the second number being different from the first number.

11. The backlight control circuit according to claim 5, wherein, The light-emitting regions include light-emitting devices, and the sub-region: A positive electrode pin for connecting to a power supply interface and the positive electrode of the light-emitting device; and A negative electrode pin for connecting to the sub-gating circuit and the negative electrode of the light-emitting device; Wherein, the positive electrode pin and the negative electrode pin are arranged in proximity.

12. The backlight control circuit according to any one of claims 1 to 11, wherein, The driving chip further includes a voltage input terminal; the backlight control circuit further includes: A sleep control circuit is respectively connected to a control terminal, a power supply terminal, and the voltage input terminal of the driving chip, and is used to control the conduction or disconnection between the power supply terminal and the voltage input terminal according to a sleep control signal input by the control terminal.

13. The backlight control circuit according to claim 12, wherein, The sleep control circuit includes: an amplification module and a switching module; Wherein, the amplification module is respectively connected to the control terminal and the switching module, and is used to amplify the sleep control signal and output the amplified sleep control signal to the switching module; The switching module is respectively connected to the power supply terminal and the voltage input terminal, and is used to control the conduction or disconnection between the power supply terminal and the voltage input terminal according to the amplified sleep control signal.

14. The backlight control circuit according to claim 13, wherein, The sleep control circuit further includes at least one of the following: A voltage stabilization module connected between the control terminal and the amplification module for stably inputting the sleep control signal to the amplification module; and A filtering module connected between the amplification module and the switching module for filtering the amplified sleep control signal.

15. The backlight control circuit according to claim 13, wherein, The amplification module includes: A second transistor, the control electrode of which is connected to the control terminal, the first electrode is grounded, and the second electrode is connected to the switching module; The switching module includes: A third transistor, the control electrode of which is connected to the amplification module, the first electrode is connected to the power supply terminal, and the second electrode is connected to the voltage input terminal.

16. A backlight module, comprising: The backlight control circuit according to any one of claims 1 to 15; And A backlight panel including a plurality of light-emitting regions, the light-emitting regions being connected to the sub-gating circuit and configured to emit light under the control of the sub-gating circuit.

17. A display device, comprising: A display panel; And The backlight module according to claim 16, disposed on the light-incident side of the display panel for providing backlight to the display panel.

Images