Method and system for lighting and driving LED array based on AM chip

Abstract

The present invention discloses a method and system for lighting and driving an LED array based on an AM chip. The light control channel of the AM chip is shared by the R channel, the G channel and the B channel of the LED array to transmit light control data, thereby controlling the display output of the LED array. While achieving the same effect as passively driving LEDs, the number of AM chips required is greatly reduced, the area of ​​the AM chip is effectively reduced, and the wiring is simple, which simplifies the stacking design of the PCB light board of the LED lamp. Even in the design of products with smaller spacing, the components can be placed neatly and orderly, reducing the driving and design costs of the LED lamp. The AM chip driving architecture can also reduce the driving current and driving voltage, reduce the wiring loss, and achieve a reduction in the power consumption of the entire system, thereby reducing the occurrence of heating of the light board and the AM chip, and further improving the display brightness of the LED array.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal display technology, and in particular to a method and system for lighting and driving an LED array based on an AM chip. Background Art

[0002] In the field of Mini / Micro small pitch direct display, MIP (Mini / Micro LED in Package) and COB (Chip-on-Board, directly binding LED chips to circuit boards) are the two major technical routes. As the pitch decreases, PM (Passive Matrix) driving mode is increasingly difficult to meet the layout of the back of the module. Therefore, MIP technology that combines lamp and driver came into being.

[0003] In practical applications, the existing lamp-driver-in-one MIP technology uses an AMIC (Analog Integrated Circuit) chip with three constant-current PWM control channels, which are connected to R, G, and B three-color LEDs to achieve LED brightness control.

[0004] However, in actual applications, since the existing AMIC chips are cut from silicon wafers one by one, and since the area of ​​AMIC chips is large, the number of AMIC chips cut from a single silicon wafer will be relatively small, and the cost will increase proportionally. Compared with traditional passive drive products with the same spacing, the cost of this solution is nearly four times that of traditional passive drive. Therefore, it is urgent to propose a technical solution that effectively reduces the area of ​​AMIC chips to reduce the driving cost of LED lights. Summary of the invention

[0005] The present invention provides a method and system for lighting and driving an LED array based on an AM chip, which can effectively reduce the area of ​​the AM chip to reduce the driving cost of the LED lamp.

[0006] In order to solve the above technical problems, the first aspect of the present invention discloses a method for lighting and driving an LED array based on an AM chip, wherein the method is applied to a lighting and driving system, wherein the lighting and driving system comprises a plurality of AM chips, wherein the LED array is composed of a plurality of LED lamps, each of the LED lamps has a one-to-one corresponding AM chip, and the R channel, G channel, and B channel of each of the LED lamps share a light control channel of the AM chip corresponding to the LED lamp, and the R channel corresponding to the LED array shares a VR power supply, a G channel shares a VG power supply, and a B channel shares a VB power supply. For any of the AM chips, the method comprises:

[0007] The AM chip detects a target channel whose power supply is in a powered-on state among the R channel, the G channel, and the B channel corresponding to the LED array;

[0008] The AM chip outputs light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs color light corresponding to the target channel, and the light control data matching the target channel includes pixel control data.

[0009] As an optional implementation, in the first aspect of the present invention, the lighting drive system further includes a controller;

[0010] Before the AM chip detects a target channel whose power source is in a powered-on state among the R channel, the G channel, and the B channel corresponding to the LED array, the method further includes:

[0011] The controller receives the light control information sent by the front end, and analyzes the light control information to obtain light control data corresponding to the LED array, wherein the light control data corresponding to the LED array includes light control data corresponding to the LED array, and the light control data corresponding to the LED array includes one or more of R channel light control data, G channel light control data and B channel light control data;

[0012] The controller obtains the address identifiers of all the AM chips, and writes the light control data corresponding to the LED array into the corresponding AM chips according to the address identifiers of all the AM chips.

[0013] As an optional implementation, in the first aspect of the present invention, all the AM chips are divided into at least one chipset, and each chipset has a unique corresponding power supply;

[0014] The method further comprises:

[0015] The controller determines a chipset that has not performed the address writing operation from all the chipsets as the current chipset, performs a power-on operation on a power supply corresponding to the current chipset, and performs an address identification writing operation on all AM chips of the current chipset;

[0016] After completing the address writing operation, the controller performs a locking operation on the address corresponding to the current chipset, and determines a next chipset from all the chipsets other than the current chipset that have not performed the address writing operation;

[0017] The controller updates the next chipset to the current chipset, and re-executes the steps of powering on the power supply corresponding to the current chipset, writing address identifiers to all AM chips of the current chipset, and locking the address corresponding to the current chipset after completing the address writing operation, until the address writing operation is completed for all chipsets;

[0018] The address identifiers of all the chipsets are different from each other, and the address identifier corresponding to each chipset is used for the controller to write corresponding light-controlled pixel data.

[0019] As an optional implementation, in the first aspect of the present invention, the lighting control data corresponding to the target channel is output in a pulse width duty cycle manner, and different moments in a refresh cycle correspond to different target channels in a power-on state, and each refresh cycle has corresponding lighting control data;

[0020] The method further comprises:

[0021] The AM chip obtains the frame rate of the controller, and determines the number of repetitions of the corresponding action switching of the AM chip within one refresh cycle according to the predetermined light control frequency and the frame rate of the controller;

[0022] The corresponding action switching of the AM chip includes power switching and data switching. The power switching includes power switching between VR power of R channel, VG power of G channel and VB power of B channel. The data switching includes data switching between light control data of R channel, light control data of G channel and light control data of B channel.

[0023] The type of the power switching matches the type of the data switching.

[0024] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0025] When it is determined that the light control data corresponding to the LED array in the current refresh cycle has been output, the AM chip determines whether the next refresh cycle is coming;

[0026] When it is determined that the next refresh cycle has not arrived, the AM chip re-executes the operation of detecting a target channel whose power supply is in the power-on state among the R channel, the G channel and the B channel corresponding to the LED array, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel;

[0027] When it is determined that the next refresh cycle has arrived, the AM chip re-acquires the light control data corresponding to the LED array from the controller, and re-executes the operation of detecting a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

[0028] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0029] The AM chip determines whether the light control data corresponding to the LED array in the current refresh cycle is completely displayed when the next refresh cycle arrives;

[0030] When it is determined that it is not fully displayed, the AM chip waits for the light control data corresponding to the LED array to be fully displayed, and after the data corresponding to the LED array is fully displayed, the AM chip re-acquires the light control data corresponding to the LED array from the controller, and re-executes the detection of a target channel among the R channel, G channel and B channel corresponding to the LED array whose power supply is in the power-on state, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

[0031] As an optional implementation, in the first aspect of the present invention, the light control channel of the AM chip corresponds to a fixed current branch and at least one variable current branch, and the current of the fixed current branch and the current of all the variable current branches are used to provide corresponding current for the light control channel of the AM chip;

[0032] The method further comprises:

[0033] In the process of outputting the light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs the color light corresponding to the target channel, the AM chip determines the corresponding fixed current coefficient for the fixed current branch and determines the corresponding current coefficients for all the variable current branches respectively;

[0034] In the process of outputting light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs color light corresponding to the target channel, the AM chip adjusts the current of its light control channel according to the fixed current coefficient corresponding to the fixed current branch and the current coefficient corresponding to each of the variable current branches in all the variable current branches.

[0035] The second aspect of the present invention discloses a system for lighting and driving an LED array based on an AM chip, wherein the lighting and driving system comprises a plurality of AM chips, wherein the LED array is composed of a plurality of LED lamps, each of the LED lamps has a one-to-one corresponding AM chip, and the R channel, G channel, and B channel of each LED lamp share a light control channel of the AM chip corresponding to the LED lamp, the R channel corresponding to the LED array shares a VR power supply, the G channel shares a VG power supply, and the B channel shares a VB power supply, and for any of the AM chips, the AM chip comprises:

[0036] A detection module, used for detecting a target channel whose power supply is in a powered-on state among the R channel, the G channel and the B channel corresponding to the LED array;

[0037] The driving module is used to output light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs color light corresponding to the target channel.

[0038] As an optional implementation, in the second aspect of the present invention, the lighting drive system further includes a controller; the controller includes a communication module, an analysis module, a first determination module, and a writing module, wherein:

[0039] The communication module is used to receive the lighting control information sent by the front end before the AM chip detects the target channel whose power is in the power-on state among the R channel, the G channel and the B channel corresponding to the LED array;

[0040] The analysis module is used to analyze the light control information to obtain light control data corresponding to the LED array, wherein the light control data corresponding to the LED array includes light control data corresponding to the LED array, and the light control data corresponding to the LED array includes one or more of R channel light control data, G channel light control data and B channel light control data;

[0041] The first determining module is used to obtain the address identifiers of all the AM chips;

[0042] The writing module is used to write the light control data corresponding to the LED array into the corresponding AM chip according to the address identifiers of all the AM chips.

[0043] As an optional implementation, in the second aspect of the present invention, all the AM chips are divided into at least one chipset, and each chipset has a unique corresponding power supply;

[0044] The first determining module is used to determine a chipset that has not performed the address writing operation from all the chipsets as the current chipset;

[0045] The writing module is further used to perform a power-on operation on the power supply corresponding to the current chipset, and perform an address identification writing operation on all AM chips of the current chipset, and after completing the address writing operation, perform a locking operation on the address corresponding to the current chipset;

[0046] The first determining module is further used to determine the next chipset from all the chipsets that have not performed the address writing operation except the current chipset, and update the next chipset to the current chipset, and trigger the writing module to re-execute the power-on operation on the power supply corresponding to the current chipset, and perform the address identification writing operation on all AM chips of the current chipset, and after completing the address writing operation, perform the locking operation on the address corresponding to the current chipset, until the address writing operation is completed for all the chipsets;

[0047] The address identifiers of all the chipsets are different from each other, and the address identifier corresponding to each chipset is used for the controller to write corresponding light-controlled pixel data.

[0048] As an optional implementation, in the second aspect of the present invention, the lighting control data corresponding to the target channel is output in a pulse width duty cycle manner, and different moments in a refresh cycle correspond to different target channels in a powered-on state, and corresponding lighting control data exists in each refresh cycle;

[0049] The detection module is further used to obtain the frame rate of the controller;

[0050] The AM chip further includes:

[0051] A second determination module is used to determine the number of repetitions of the corresponding action switching of the AM chip within one refresh cycle according to the predetermined light control frequency and the frame rate of the controller;

[0052] The corresponding action switching of the AM chip includes power switching and data switching. The power switching includes power switching between VR power of R channel, VG power of G channel and VB power of B channel. The data switching includes data switching between light control data of R channel, light control data of G channel and light control data of B channel.

[0053] The type of the power switching matches the type of the data switching.

[0054] As an optional implementation, in the second aspect of the present invention, the AM chip further includes:

[0055] A judgment module, for judging whether the next refresh cycle has arrived after judging that the light control data corresponding to the LED array in the current refresh cycle has been outputted; when judging that the next refresh cycle has not arrived, triggering the detection module to re-execute the detection of a target channel whose power supply is in a powered-on state among the R channel, the G channel and the B channel corresponding to the LED array, and triggering the driving module to execute the light control channel through the AM chip, and outputting the light control data matching the target channel, so that the LED array outputs the color light corresponding to the target channel;

[0056] The second determination module is also used to, when it is determined that the next refresh cycle has arrived, re-acquire the light control data corresponding to the LED array from the controller, and trigger the detection module to re-execute the detection of a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and trigger the driving module to execute the light control channel through the AM chip, and output the light control data matching the target channel, so that the LED array outputs the color light corresponding to the target channel.

[0057] As an optional implementation, in the second aspect of the present invention, the AM chip further includes:

[0058] A judgment module, used to judge whether the lighting control data corresponding to the LED array in the current refresh cycle is completely displayed when the next refresh cycle arrives;

[0059] The second determination module is also used to, when it is determined that the light control data corresponding to the LED array is not fully displayed, wait for the light control data corresponding to the LED array to be fully displayed, and after the data corresponding to the LED array is fully displayed, re-acquire the light control data corresponding to the LED array from the controller, and trigger the detection module to re-execute the detection of a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and trigger the driving module to execute the light control channel through the AM chip, and output the light control data matching the target channel, so that the LED array outputs the color light corresponding to the target channel.

[0060] As an optional implementation, in the second aspect of the present invention, the light control channel of the AM chip corresponds to a fixed current branch and at least one variable current branch, and the current of the fixed current branch and the current of all the variable current branches are used to provide corresponding current for the light control channel of the AM chip;

[0061] The AM chip further includes:

[0062] A coefficient determination module, used for determining a corresponding fixed current coefficient for the fixed current branch and respectively determining corresponding current coefficients for all the variable current branches in a process in which the driving module outputs light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs a color light corresponding to the target channel;

[0063] The current regulating module is used to output the light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs the color light corresponding to the target channel, and regulate the current of the light control channel according to the fixed current coefficient corresponding to the fixed current branch and the current coefficient corresponding to each of the variable current branches in all the variable current branches.

[0064] The third aspect of the present invention discloses another system for lighting and driving an LED array based on an AM chip, the system comprising:

[0065] A memory storing executable program code;

[0066] at least one AM chip and a controller coupled to the memory;

[0067] Each of the AM chips calls the executable program code stored in the memory to execute the steps corresponding to the AM chip in any one of the methods for lighting and driving an LED array based on an AM chip disclosed in the first aspect of the present invention; the controller calls the executable program code stored in the memory to execute the steps corresponding to the controller in any one of the methods for lighting and driving an LED array based on an AM chip disclosed in the first aspect of the present invention.

[0068] The fourth aspect of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute part or all of the steps in any method for lighting and driving an LED array based on an AM chip disclosed in the first aspect of the present invention.

[0069] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0070] In an embodiment of the present invention, a system for lighting and driving an LED array based on an AM chip includes a plurality of AM chips, wherein the LED array is composed of a plurality of LED lamps, each LED lamp has a one-to-one corresponding AM chip, and the R channel, G channel, and B channel of each LED lamp share a light control channel of the AM chip corresponding to the LED lamp, and the R channel corresponding to the LED array shares a VR power supply, the G channel shares a VG power supply, and the B channel shares a VB power supply. For any AM chip, the AM chip detects a target channel whose power supply is in a power-on state among the R channel, G channel, and B channel corresponding to the LED array; the AM chip outputs light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs a color light corresponding to the target channel, and the light matching the target channel The light control data includes pixel control data, that is, the light control channel of the AM chip is shared by the R channel, G channel, and B channel of the LED array to transmit the light control data, thereby controlling the display output of the LED array. While achieving the same effect as passively driven LEDs, the number of AM chips required is greatly reduced, the area of ​​the AM chip is effectively reduced, and the wiring is simple, which simplifies the stacking design of the PCB light board of the LED lamp. Even in the design of smaller pitch products, the devices can be placed neatly and orderly, reducing the driving and design costs of the LED lamp; and the AM chip driving architecture can also reduce the driving current and driving voltage, reduce the wiring loss, and achieve a reduction in the power consumption of the entire system, thereby reducing the occurrence of heating of the light board and the AM chip, and further improving the display brightness of the LED array. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0072] Figure 1 It is a flow chart of a method for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention;

[0073] Figure 2 It is a schematic diagram of the chip structure of an AM chip disclosed in an embodiment of the present invention;

[0074] Figure 3 It is a structural diagram of lighting driving between a controller and an AM chip disclosed in an embodiment of the present invention;

[0075] Figure 4 This is a schematic diagram of a light box driving structure disclosed in an embodiment of the present invention;

[0076] Figure 5 It is a schematic diagram of the architecture of an LED array driver corresponding to an AM chip disclosed in the present invention;

[0077] Figure 6 It is a schematic diagram of a power-on control timing before writing address identification to the chip of each chipset disclosed in an embodiment of the present invention;

[0078] Figure 7 It is a schematic diagram of a method for writing an address identifier of an AM chip disclosed in an embodiment of the present invention;

[0079] Figure 8 It is a schematic diagram of the lighting control timing of a lighting control channel of an AM chip disclosed in an embodiment of the present invention;

[0080] Fig. 9 It is a schematic diagram of current branches and fine-tuning of a light control channel of an AM chip disclosed in an embodiment of the present invention;

[0081] Fig.10 It is a structural schematic diagram of a system for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention;

[0082] Fig.11 It is a structural schematic diagram of another system for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention;

[0083] Fig.12 It is a structural schematic diagram of another system for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0084] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0085] The terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, device, product or end including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or ends.

[0086] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0087] The present invention discloses a method and system for lighting and driving an LED array based on an AM chip. The AM chip outputs light control data that matches one of the three channels of the LED array, namely, the R channel, the G channel, and the B channel, which is in a powered-on state, through the light control channel of the AM chip, so that the LED array outputs a color light corresponding to the target channel, that is, the light control channel of the AM chip is shared by the R channel, the G channel, and the B channel of the LED array to transmit light control data, thereby controlling the display output of the LED array. While achieving the same effect as passively driving LEDs, the number of AM chips required is greatly reduced, and the area of ​​the AM chip is effectively reduced to reduce the driving cost of the LED lamp, which is particularly suitable for direct display products with small spacing. The following are detailed descriptions.

[0088] Embodiment 1

[0089] See also Figure 1 , Figure 1 1 is a flow chart of a method for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention. Figure 1 The described method can be applied to any liquid crystal display scene that requires lighting drive (such as movie watching scene and e-sports game scene) and the scene has a corresponding lighting drive system, and the system includes multiple AM ​​chips, wherein the LED array is composed of multiple LED lamps, each LED lamp has a one-to-one corresponding AM chip, and the R channel, G channel, and B channel of each LED lamp share the light control channel of the AM chip corresponding to the LED lamp, and the R channel corresponding to the LED array shares the VR power supply, the G channel shares the VG power supply, and the B channel shares the VB power supply. For any AM chip, Figure 1 As shown, the method for lighting and driving the LED array based on the AM chip may include the following operations:

[0090] 101. The AM chip detects a target channel whose power supply is in a powered-on state among the R channel, the G channel, and the B channel corresponding to the LED array.

[0091] In the embodiment of the present invention, each LED lamp has a one-to-one corresponding AM chip, which can be understood as each pixel corresponding to each LED lamp has a one-to-one corresponding AM chip, and the one-to-one corresponding AM chips of all LED lamps are different from each other.

[0092] 102. The AM chip outputs light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs color light corresponding to the target channel, and the light control data matching the target channel includes pixel control data.

[0093] In the embodiment of the present invention, the lighting control data matched with the target channel also includes brightness control data. Figure 2 is a schematic diagram of the chip structure of an AM chip disclosed in an embodiment of the present invention, such as Figure 2As shown, the AM chip has a unique light control channel CH, which is used to connect the LED lamp and control the brightness of the LED lamp. The channel is implemented by analog circuits. The area of ​​a single channel is greatly reduced compared to the existing three light control channels. The entire area can be reduced to 1 / 4 of the existing area or even smaller. VDD is the power supply for the AM chip, such as 1.2V, 1.5V, 1.8V, etc. CLK and DI provide control signals for data communication between the controller and the AM chip to transmit light control data. The light control data and the following address identifiers are written through communication protocols such as NetBEUI protocol. SW is used to control the switching of light control data (PWM data) of R channel, G channel and B channel, and cooperate with the switching of power supplies (VR power supply, VG power supply, VB power supply) of each channel of R channel, G channel and B channel to realize the three-color switching and lighting of the LED lamp. It should be noted that the relevant data flows from the light control channel CH to the LED lamp through the corresponding interface, display control, crystal oscillator and constant current source.

[0094] It can be seen that implementation Figure 1 In the described method of lighting and driving an LED array based on an AM chip, the AM chip outputs light control data that matches one of the target channels in the power-on state among the three channels of the R channel, G channel, and B channel of the LED array through the light control channel of the AM chip, so that the LED array outputs a color light corresponding to the target channel, that is, the light control channel of the AM chip is shared by the R channel, G channel, and B channel of the LED array to transmit light control data, thereby controlling the display output of the LED array. While achieving the same effect as passively driving LEDs, the number of AM chips required is greatly reduced, the area of ​​the AM chip is effectively reduced, and the routing is simple, which simplifies the stacking design of the PCB light board of the LED lamp. Even in the design of smaller pitch products, the devices can be placed neatly and orderly, reducing the driving and design costs of the LED lamp; and the AM chip driving architecture can also reduce the driving current and driving voltage, reduce the routing loss, and achieve a reduction in the power consumption of the entire system, thereby reducing the occurrence of heating of the light board and the AM chip, and further improving the display brightness of the LED array.

[0095] In an optional embodiment, the lighting drive system further includes a controller; and before the AM chip detects the target channel whose power supply is in the power-on state among the R channel, the G channel and the B channel corresponding to the LED array, the method may further include the following steps:

[0096] The controller receives the light control information sent by the front end, analyzes the light control information, and obtains light control data corresponding to the LED array, wherein the light control data corresponding to the LED array includes light control data corresponding to the LED array, and the light control data corresponding to the LED array includes one or more of R channel light control data, G channel light control data, and B channel light control data;

[0097] The controller obtains the address identifiers of all AM chips, and writes the light control data corresponding to the LED array into the corresponding AM chips according to the address identifiers of all AM chips.

[0098] In this optional embodiment, the front end can be understood as any terminal that can send lighting control information to the controller, such as user equipment (such as computers, mobile phones), and receiving cards connected to user equipment. The user equipment can directly send the lighting control information to the controller, or the receiving card can send the lighting control information to the controller.

[0099] In this optional embodiment, the address identifier of the AM chip may be any identifier capable of address recognition. And optionally, the controller may control one AM chip or a group of AM chips.

[0100] In this optional embodiment, optionally, Figure 3 is a schematic diagram of a structure for lighting driving between a controller and an AM chip disclosed in an embodiment of the present invention, such as Figure 3 As shown, the controller receives the light control information from the front end through TXP / TXN, and reads the signal back to the front end through RXP / RXN. Whether receiving or reading back, the signals transmitted are differential high-speed transmission signals. The light control data is transmitted to the AM chip of the chipset Mini / micro LED array through CLK, SW and DATA1, DATA2, DATAM, and the input and output of VR power supply, VG power supply, and VB power supply are provided through analog switches (also called timing switches). The input and output of power supply VDDIN, VDDOUT1, VDDOUT2, and VDDOUTN are provided to the AM chip of the chipset through analog switches. The two analog switches here are two analog switches. Among them, Figure 3 Two analog switches are shown, and the specific number corresponds to the corresponding display screen. Optionally, Figure 3 The analog switch can be built into the controller or placed outside the controller, which can reduce the design area and number of PIN pins of the controller. Figure 3It can be seen that the number of AM chips is small and the required current is small. Therefore, VR power supply, VG power supply, and VB power supply can carry chips from many chipsets at the same time. For example, if the display module of 9 chipsets is externally connected to the analog switch, only three channels of VR power supply, VG power supply, and VB power supply are required; similarly, since the current of the AM chip is small, about 1mA, the switch can be realized with very simple analog development.

[0101] In this optional embodiment, optionally, Figure 4 is a schematic diagram of a light box driving structure disclosed in an embodiment of the present invention, such as Figure 4 As shown, optionally, the receiving card is installed on the HUB, and obtains image data transmission from the front end (such as a computer) through a network cable, and analyzes the obtained image data to obtain multiple module lighting control information and the module identification corresponding to each module lighting control information, and transmits the module lighting control information to the controller corresponding to the module identification through the CON1, CON2, CON3, CON4, and CONn ports according to the module identification corresponding to the module lighting control information. The controller analyzes the received module lighting control information, obtains the corresponding light control data, and performs lighting drive of the corresponding AM chip. Among them, SPI communicates with Flash to store or read the calibration data of the light box.

[0102] It can be seen that this optional embodiment writes the lighting control data through the address identifier of the AM chip, which can improve the writing accuracy and efficiency of the lighting control data, thereby facilitating the improvement of the lighting driving accuracy of the AM chip.

[0103] In another optional embodiment, all AM chips are divided into at least one chipset, specifically, into rows or columns, and each chipset has a unique corresponding power supply, that is, the power supply is used to power all AM chips of the corresponding chipset; the method may further include the following steps:

[0104] The controller determines a chipset that has not performed the address writing operation from all chipsets as the current chipset, performs a power-on operation on the power supply corresponding to the current chipset, and performs an address identification writing operation on all AM chips of the current chipset;

[0105] After completing the address writing operation, the controller performs a locking operation on the address corresponding to the current chipset, and determines the next chipset from all chipsets other than the current chipset that have not performed the address writing operation;

[0106] The controller updates the next chipset as the current chipset, and re-executes the above-mentioned steps of powering on the power supply corresponding to the current chipset, writing the address identifier to all AM chips of the current chipset, and locking the address corresponding to the current chipset after completing the address writing operation, until the address writing operation is completed for all chipsets;

[0107] The address identifiers of all chipsets are different, and the address identifier corresponding to each chipset is used for the controller to write the corresponding light control pixel data. Further, the address identifiers of all AM chips in a chipset may be the same, different, or all the same.

[0108] In this optional embodiment, Figure 5 Schematic diagram of the LED array driver architecture corresponding to an AM chip disclosed in the present invention, such as Figure 5 As shown, the AM chips are classified into 3 rows in a group, and the power supplies corresponding to the chipset in each row are VDD1, VDD2, and VDDm respectively, and each chip group in each row corresponds to multiple AM ​​chips. The AM chips in the same column of each row receive the same light control data D1, D2, D3, D4, and Dn from the controller. Each AM chip corresponds to an LED lamp, and the R channel of each LED lamp shares the VR power supply, the VG power supply, and the VB power supply. The clock pin CLK and the channel switching switch SW of each AM chip are communicated with the controller to control the AM chip to output the light control data of the corresponding color to the corresponding LED lamp through the light control channel CH in a time-sharing manner to display an image of the corresponding color. Specifically, when the VR power supply is supplied, the channel switching switch SW of the AM chip connects its light control channel to the R channel of the LED lamp to output the light control data of the R channel; when the VG power supply is supplied, the channel switching switch SW of the AM chip connects its light control channel to the G channel of the LED lamp to output the light control data of the G channel; when the VB power supply is supplied, the channel switching switch SW of the AM chip connects its light control channel to the B channel of the LED lamp to output the light control data of the B channel.

[0109] In this optional embodiment, optionally, Figure 6 is a schematic diagram of a power-on control timing before writing address identification to the chip of each chipset disclosed in an embodiment of the present invention, such as Figure 6As shown, the controller controls the power-on timing of each row of chipsets in a group of rows, which are VDD1, VDD2, VDD3, and VDDm. For each row of chipsets, after controlling VDD1 of the first row of chipsets to power on, the address write operation is performed on it through CLK and DI. After writing the address identifier, the address of the AM chip of the chipset in this row is locked, and the same operation is performed on the next row of chipsets until the address identifiers of all rows of chipsets are written. Among them, for address locking, different write instructions and address write enable registers are defined for the AM chip of each row of chipsets. After the chip address of each row is written, the address write function needs to be disabled to reduce the subsequent write address instructions that cause the previous chip address to be overwritten. Figure 7 It is a schematic diagram of a method for writing an address identifier of an AM chip disclosed in an embodiment of the present invention.

[0110] It can be seen that this optional embodiment writes addresses to the AM chip of each chipset in turn, so that the lighting control data can be written according to the address identifier later, and after writing the corresponding address identifier to the AM chip of each chipset, performs a locking operation on the address, thereby reducing the occurrence of subsequent write address instructions overwriting the address of the AM chip that has already been written, and further ensuring the accuracy and success of subsequent lighting control data writing; and only switches the analog signal VR power supply, VG power supply, VB power supply and VDD power supply, and the full-screen CLK and column data are shared, so that the overall control architecture of the AM chip is simple, and the timing control is flexible and simple, thereby improving the control flexibility of the LED lamp.

[0111] In another optional embodiment, the light control data corresponding to the target channel is output in a pulse width duty cycle manner, and different moments of the refresh cycle correspond to different target channels in a power-on state, such as at moment T1, VR power is powered on, at moment T2, VG ​​power is powered on, and at moment T3, VB power is powered on; each refresh cycle has corresponding light control data, wherein the light control data corresponding to all refresh cycles may be all the same, partially the same, or all different; and the method may further include the following steps:

[0112] The AM chip obtains the frame rate of the controller, and determines the number of repetitions of the corresponding action switching of the AM chip within one refresh cycle according to the predetermined lighting control frequency and the frame rate of the controller;

[0113] Among them, the action switching corresponding to the AM chip includes power switching and data switching. The power switching includes power switching between the VR power supply of the R channel, the VG power supply of the G channel and the VB power supply of the B channel. The data switching includes data switching between the lighting control data of the R channel, the lighting control data of the G channel and the lighting control data of the B channel; wherein the type of power switching matches the type of data switching and the switching is synchronized.

[0114] In this optional embodiment, for example, the frame rate of the controller is 60Hz and the lighting control frequency is 3840Hz. Therefore, it is necessary to repeatedly switch the VR power supply of the R channel, the VG power supply of the G channel, the VB power supply of the B channel and the corresponding lighting control data of the R channel, the lighting control data of the G channel and the lighting control data of the B channel 64 times. Figure 8 Schematic diagram of the lighting control timing of a lighting control channel of an AM chip disclosed in an embodiment of the present invention. Figure 8 As shown, within a refresh cycle VSYNC, the power supply of each channel is valid at a low level, and the channel switching switch SW of the AM chip switches from VR power supply, VG power supply, and VB power supply in sequence, and switches the lighting control data R1, G1, and B1 of the corresponding channel while switching the power supply, until it switches to 64 times, among which step 101-step 102 represents an action, and each time an action switching is performed, step 101-step 102 is executed once.

[0115] It can be seen that this optional embodiment switches the channel power supply and the corresponding light control data according to the specified number of repetitions within one refresh cycle based on the frame rate of the controller and the required light control frequency, which can reduce the occurrence of flickering during the LED array display process and improve the display quality of the LED array.

[0116] In yet another optional embodiment, the method may further include the following steps:

[0117] When it is determined that the light control data corresponding to the LED array in the current refresh cycle has been output, the AM chip determines whether the next refresh cycle has arrived;

[0118] When it is determined that the next refresh cycle has not arrived, the AM chip re-executes the above-mentioned operation of detecting a target channel whose power supply is in the power-on state among the R channel, the G channel and the B channel corresponding to the LED array, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel;

[0119] When it is determined that the next refresh cycle has arrived, the AM chip re-acquires the light control data corresponding to the LED array from the controller, and re-executes the above-mentioned detection of a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

[0120] In this optional embodiment, optionally, the LED array displays a complete image corresponding to the lighting control data, indicating that the lighting control data has completed output.

[0121] It can be seen that after this optional embodiment detects that the lighting control data corresponding to the current refresh cycle is completely displayed in the LED array, if the next refresh cycle has not arrived, the aforementioned action switching operation will continue to be repeated. If it arrives, new lighting control data will be obtained from the controller to drive the lighting. This can reduce the blank space but no lighting control data output at the last moment between two refresh cycles due to the clock error inside the AM chip and the frame rate error of the controller, thereby reducing the occurrence of flickering when watching. This further improves the display quality of the LED array.

[0122] In yet another optional embodiment, the method may further include the following steps:

[0123] The AM chip determines whether the lighting control data corresponding to the LED array in the current refresh cycle is fully displayed when the next refresh cycle arrives;

[0124] When it is determined that it is not fully displayed, the AM chip waits for the light control data corresponding to the LED array to be fully displayed, and after the data corresponding to the LED array is fully displayed, the AM chip re-obtains the light control data corresponding to the LED array from the controller, and re-executes the above-mentioned detection of a target channel among the R channel, G channel and B channel corresponding to the LED array whose power supply is in the power-on state, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

[0125] In this optional embodiment, optionally, if the collected image display of the LED array is consistent with the image display corresponding to the lighting control data, it means that the lighting control data corresponding to the LED array is completely displayed.

[0126] It can be seen that when the next refresh cycle arrives, if the lighting control data corresponding to the current refresh cycle is not fully displayed, the waiting period will be fully displayed, and when the display is completed, new lighting control data will be obtained from the controller again to drive the lighting. This can reduce the blank space without lighting control data output at the last moment between two refresh cycles due to the clock error inside the AM chip and the frame rate error of the controller, thereby reducing the occurrence of flickering when watching. This further improves the display quality of the LED array.

[0127] In another optional embodiment, the light control channel of the AM chip corresponds to a fixed current branch and at least one variable current branch, wherein the current of the fixed current branch and the current of all variable current branches are used to provide corresponding current for the light control channel of the AM chip; and the method may further include the following steps:

[0128] The AM chip determines the corresponding fixed current coefficient for the fixed current branch and determines the corresponding current coefficient for all variable current branches respectively;

[0129] In the process of outputting light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs color light corresponding to the target channel, the AM chip adjusts the current of its light control channel according to the fixed current coefficient corresponding to the fixed current branch and the current coefficient corresponding to each variable current branch in all variable current branches.

[0130] In this optional embodiment, Fig. 9 Schematic diagram of current branch and fine adjustment of a light control channel of an AM chip disclosed in an embodiment of the present invention, such as Fig. 9 As shown, it includes a fixed current branch with a fixed current coefficient of 16, and the current coefficients of the five variable current branches D(0)-D(5) are 1, 2, 4, 8, 16, and 32 respectively. Among them, the constant current of the lighting control channel is a preset current, such as 1uA, and the fixed current coefficient of the fixed current branch is the coefficient of the constant current (such as 1uA) when the lighting control channel is turned on, that is, 16uA. The maximum current that the lighting control channel can achieve is 16*1uA+(1+2+4+8+16+32)*1uA=79uA, the normal current is 16*1uA+32*1uA=48uA, and the minimum current is 16*1uA=16uA. Therefore, the current regulation accuracy of the lighting control channel is 1 / 48=2%, that is, ±2%.

[0131] It can be seen that this optional embodiment configures the corresponding fixed current coefficient and variable current coefficient for the light control channel, that is, adopts a purely digital current method to fine-tune the current in the lighting drive process, without the need for a separate IP and without occupying a large amount of registers and analog design area, and can provide accurate and stable current for the lighting drive, thereby improving the display effect of the LED array while further reducing the area of ​​the AM chip and further reducing the cost; and because the R, G, and B three-color channels share the light control channel of the AM chip, there is no need to distinguish the colors separately to adjust the current, which can improve the flexibility and convenience of current fine-tuning in the lighting drive process of the R, G, and B three-color channels.

[0132] Embodiment 2

[0133] See also Fig.10 , Fig.10 1 is a schematic diagram of a system for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention. Fig.10 The described system can be applied to any liquid crystal display scene that requires lighting drive (such as movie watching scene and e-sports game scene) and the scene has a corresponding lighting drive system, and the system includes multiple AM ​​chips, wherein the LED array is composed of multiple LED lamps, each LED lamp has a one-to-one corresponding AM chip, and the R channel, G channel, and B channel of each LED lamp share the light control channel of the AM chip corresponding to the LED lamp. The R channel corresponding to the LED array shares the VR power supply, the G channel shares the VG power supply, and the B channel shares the VB power supply. For any AM chip, Fig.10 As shown, the AM chip includes:

[0134] The detection module 201 is used to detect a target channel whose power source is in a powered-on state among the R channel, the G channel and the B channel corresponding to the LED array;

[0135] The driving module 202 is used to output light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs color light corresponding to the target channel, and the light control data matching the target channel includes pixel control data.

[0136] It can be seen that implementation Fig.10The described system for lighting and driving an LED array based on an AM chip outputs light control data that matches one of the target channels in the power-on state among the three channels of the LED array, namely, the R channel, the G channel, and the B channel, through the light control channel of the AM chip, so that the LED array outputs a color light corresponding to the target channel, that is, the light control channel of the AM chip is shared by the R channel, the G channel, and the B channel of the LED array to transmit light control data, thereby controlling the display output of the LED array. While achieving the same effect as passively driving LEDs, the number of AM chips required is greatly reduced, the area of ​​the AM chip is effectively reduced, and the wiring is simple, which simplifies the stacking design of the PCB light board of the LED lamp. Even in the design of smaller pitch products, the devices can be placed neatly and orderly, reducing the driving and design costs of the LED lamp. The AM chip driving architecture can also reduce the driving current and driving voltage, reduce the wiring loss, and achieve a reduction in the power consumption of the entire system, thereby reducing the occurrence of heating of the light board and the AM chip, and further improving the display brightness of the LED array.

[0137] In an optional embodiment, if Fig.11 As shown, Fig.11 FIG. 1 is a schematic diagram of another system for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention. Fig.11 As shown, the lighting drive system further includes a controller; the controller includes a communication module 203, an analysis module 204, a first determination module 205, and a writing module 206, wherein:

[0138] The communication module 203 is used to receive the lighting control information sent by the front end before the AM chip detects the target channel whose power is in the power-on state among the R channel, the G channel and the B channel corresponding to the LED array;

[0139] The analysis module 204 is used to analyze the light control information to obtain light control data corresponding to the LED array, wherein the light control data corresponding to the LED array includes light control data corresponding to the LED array, and the light control data corresponding to the LED array includes one or more of R channel light control data, G channel light control data and B channel light control data;

[0140] The first determination module 205 is used to obtain the address identifiers of all AM chips;

[0141] The writing module 206 is used to write the light control data corresponding to the LED array into the corresponding AM chip according to the address identifiers of all the AM chips.

[0142] It can be seen that implementation Fig.11The described system for lighting and driving an LED array based on an AM chip writes light control data through the address identifier of the AM chip, which can improve the writing accuracy and efficiency of the light control data, thereby facilitating improving the lighting and driving accuracy of the AM chip.

[0143] In another optional embodiment, all AM chips are divided into at least one chipset, in rows or columns, and each chipset has a unique corresponding power supply, that is, the power supply is used to power all AM chips in the corresponding chipset;

[0144] A first determining module 205 is used to determine a chipset that has not performed the address writing operation from all chipsets as the current chipset;

[0145] The writing module 206 is further used to perform a power-on operation on the power supply corresponding to the current chipset, and perform an address identification writing operation on all AM chips of the current chipset, and after completing the address writing operation, perform a locking operation on the address corresponding to the current chipset;

[0146] The first determination module 205 is further used to determine the next chipset from all chipsets that have not performed the address write operation except the current chipset, and update the next chipset as the current chipset, and trigger the write module 206 to re-execute the above-mentioned steps of performing the power-on operation on the power supply corresponding to the current chipset, performing the address identification write operation on all AM chips of the current chipset, and performing the locking operation on the address corresponding to the current chipset after completing the address write operation, until the address write operation is completed for all chipsets;

[0147] The address identifiers of all chipsets are different, and the address identifier corresponding to each chipset is used for the controller to write the corresponding light control pixel data. Further, the address identifiers of all AM chips in a chipset may be the same, different, or all the same.

[0148] It can be seen that implementation Fig.11 The described system for lighting and driving an LED array based on an AM chip writes the address to the AM chip of each chipset in turn so that the lighting control data can be subsequently written according to the address identifier, and after writing the corresponding address identifier to the AM chip of each chipset, the address is locked, thereby reducing the occurrence of subsequent write address instructions overwriting the address of the AM chip that has already been written, and further ensuring the accuracy and success of subsequent lighting control data writing.

[0149] In another optional embodiment, the lighting control data corresponding to the target channel is output in a pulse width duty cycle manner, and different moments of the refresh cycle correspond to different target channels in a power-on state, such as at moment T1, VR power is powered on, at moment T2, VG ​​power is powered on, and at moment T3, VB power is powered on; each refresh cycle has corresponding lighting control data, wherein the lighting control data corresponding to all refresh cycles may be all the same, partially the same, or all different;

[0150] The detection module 201 is also used to obtain the frame rate of the controller;

[0151] like Fig.11 As shown, the AM chip also includes:

[0152] The second determination module 207 is used to determine the number of repetitions of the corresponding action switching of the AM chip within a refresh cycle according to the predetermined light control frequency and the frame frequency of the controller;

[0153] Among them, the action switching corresponding to the AM chip includes power switching and data switching. The power switching includes power switching between the VR power supply of the R channel, the VG power supply of the G channel and the VB power supply of the B channel. The data switching includes data switching between the lighting control data of the R channel, the lighting control data of the G channel and the lighting control data of the B channel; wherein the type of power switching matches the type of data switching and the switching is synchronized.

[0154] It can be seen that implementation Fig.11 The described system for lighting and driving an LED array based on an AM chip switches channel power and corresponding lighting control data according to a specified number of repetitions within a refresh cycle based on the frame rate of the controller and the required lighting control frequency, which can reduce the occurrence of flickering during the display process of the LED array and improve the display quality of the LED array.

[0155] In yet another optional embodiment, Fig.11 As shown, the AM chip also includes:

[0156] The judging module 208 is used to judge whether the next refresh cycle has arrived after judging that the light control data corresponding to the LED array in the current refresh cycle has been outputted; when judging that the next refresh cycle has not arrived, trigger the detection module 201 to re-detect a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and trigger the driving module 202 to output the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel;

[0157] The second determination module 207 is also used to, when it is determined that the next refresh cycle has arrived, re-acquire the light control data corresponding to the LED array from the controller, and trigger the detection module 201 to re-execute the above-mentioned detection of a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and trigger the driving module 202 to execute the above-mentioned light control channel through the AM chip, and output the light control data matching the target channel, so that the LED array outputs the color light corresponding to the target channel.

[0158] It can be seen that implementation Fig.11 The described system for driving the LED array to light up based on an AM chip, after detecting that the light control data corresponding to the current refresh cycle is completely displayed in the LED array, continues to repeat the aforementioned action switching operation if the next refresh cycle has not arrived; if it arrives, it obtains new light control data from the controller to drive the lighting up. This can reduce the blank space but no light control data output at the last moment between two refresh cycles due to the clock error inside the AM chip and the frame rate error of the controller, thereby reducing the occurrence of flickering when viewing. This further improves the display quality of the LED array.

[0159] In yet another optional embodiment, Fig.11 As shown, the AM chip also includes:

[0160] The judgment module 208 is used to judge whether the light control data corresponding to the LED array in the current refresh cycle is completely displayed when the next refresh cycle arrives;

[0161] The second determination module 207 is also used to wait for the light control data corresponding to the LED array to be fully displayed when it is determined that it is not fully displayed, and after the data corresponding to the LED array is fully displayed, re-acquire the light control data corresponding to the LED array from the controller, and re-trigger the detection module 201 to perform the above-mentioned detection of a target channel among the R channel, G channel and B channel corresponding to the LED array whose power supply is in the power-on state, and trigger the driving module 202 to output the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

[0162] It can be seen that implementation Fig.11The described system for driving the LED array to light up based on an AM chip, when the next refresh cycle arrives, if the light control data corresponding to the current refresh cycle is not fully displayed, the system will wait for a period of time for full display, and when the display is complete, it will obtain new light control data from the controller to drive the lighting. This can reduce the blank space without light control data output at the last moment between two refresh cycles due to the clock error inside the AM chip and the frame rate error of the controller, thereby reducing the occurrence of flickering when watching. This further improves the display quality of the LED array.

[0163] In yet another optional embodiment, Fig.11 As shown, the light control channel of the AM chip corresponds to a fixed current branch and at least one variable current branch, wherein the current of the fixed current branch and the current of all variable current branches are used to provide corresponding current for the light control channel of the AM chip;

[0164] like Fig.11 As shown, the AM chip also includes:

[0165] A coefficient determination module 209, used to determine a corresponding fixed current coefficient for a fixed current branch, and to determine corresponding current coefficients for all variable current branches respectively;

[0166] The current regulating module 210 is used to output the light control data matching the target channel through the light control channel of the AM chip when the driving module 202 outputs the light control data matching the target channel, so that when the LED array outputs the color light corresponding to the target channel, the current of the light control channel is adjusted according to the fixed current coefficient corresponding to the fixed current branch and the current coefficient corresponding to each variable current branch in all the variable current branches.

[0167] It can be seen that implementation Fig.11 The described system for lighting and driving an LED array based on an AM chip configures a corresponding fixed current coefficient and a variable current coefficient for a light control channel, that is, a purely digital current method is used to fine-tune the current during the lighting and driving process. It does not require a separate IP and does not occupy a large amount of register and analog design area. It can provide accurate and stable current for the lighting drive, thereby improving the display effect of the LED array while further reducing the area of ​​the AM chip and further reducing the cost. In addition, since the R, G, and B color channels share the light control channel of the AM chip, there is no need to distinguish colors separately to adjust the current, which can improve the flexibility and convenience of current fine-tuning during the lighting and driving process of the R, G, and B color channels.

[0168] Embodiment 3

[0169] See also Fig.12 , Fig.12is a schematic diagram of the structure of another system for lighting and driving an LED array based on an AM chip disclosed in an embodiment of the present invention. Fig.12 The described system may include:

[0170] A memory 301 storing executable program codes;

[0171] At least one AM chip 302 and a controller 303 coupled to the memory 301;

[0172] Furthermore, it may also include an input interface 305 and an output interface 306 coupled to the AM chip 302 and the controller 303;

[0173] Among them, the controller 303 calls the executable program code stored in the memory 301 to execute the steps corresponding to the controller in the method for lighting and driving an LED array based on an AM chip disclosed in Example 1 of the present invention; each AM chip 302 calls the executable program code stored in the memory 301 to execute the steps corresponding to the AM chip in the method for lighting and driving an LED array based on an AM chip disclosed in Example 1 of the present invention.

[0174] Embodiment 4

[0175] An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute some or all of the steps in the method for lighting and driving an LED array based on an AM chip disclosed in the first embodiment of the present invention.

[0176] The device embodiments described above are only illustrative, wherein the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, i.e., they may be located in one place, or they may be distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0177] Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on such an understanding, the above technical solution can be essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, and the storage medium includes a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable rewritable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0178] Finally, it should be noted that the method and system for lighting and driving an LED array based on an AM chip disclosed in the embodiment of the present invention only disclose the preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. 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 invention.

Claims

1. A method for lighting and driving an LED array based on an AM chip, characterized in that: The method is applied to a lighting drive system, the lighting drive system includes a plurality of AM chips, wherein the LED array is composed of a plurality of LED lamps, each of the LED lamps has a one-to-one corresponding AM chip, the R channel, the G channel, and the B channel of each LED lamp share the light control channel of the AM chip corresponding to the LED lamp, the R channel corresponding to the LED array shares the VR power supply, the G channel shares the VG power supply, and the B channel shares the VB power supply, and for any of the AM chips, the method includes: The AM chip detects a target channel whose power supply is in a powered-on state among the R channel, the G channel, and the B channel corresponding to the LED array; The AM chip outputs light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs color light corresponding to the target channel, and the light control data matching the target channel includes pixel control data.

2. The method for lighting and driving an LED array based on an AM chip according to claim 1, characterized in that: The lighting drive system further includes a controller; Before the AM chip detects a target channel whose power source is in a powered-on state among the R channel, the G channel, and the B channel corresponding to the LED array, the method further includes: The controller receives the light control information sent by the front end, and analyzes the light control information to obtain light control data corresponding to the LED array, wherein the light control data corresponding to the LED array includes light control data corresponding to the LED array, and the light control data corresponding to the LED array includes one or more of R channel light control data, G channel light control data and B channel light control data; The controller obtains the address identifiers of all the AM chips, and writes the light control data corresponding to the LED array into the corresponding AM chips according to the address identifiers of all the AM chips.

3. The method for lighting and driving an LED array based on an AM chip according to claim 2, characterized in that: All the AM chips are divided into at least one chipset, and each chipset has a unique corresponding power supply; The method further comprises: The controller determines a chipset that has not performed the address writing operation from all the chipsets as the current chipset, performs a power-on operation on a power supply corresponding to the current chipset, and performs an address identification writing operation on all AM chips of the current chipset; After completing the address writing operation, the controller performs a locking operation on the address corresponding to the current chipset, and determines a next chipset from all the chipsets other than the current chipset that have not performed the address writing operation; The controller updates the next chipset to the current chipset, and re-executes the steps of powering on the power supply corresponding to the current chipset, writing address identifiers to all AM chips of the current chipset, and locking the address corresponding to the current chipset after completing the address writing operation, until the address writing operation is completed for all chipsets; The address identifiers of all the chipsets are different from each other, and the address identifier corresponding to each chipset is used for the controller to write corresponding light-controlled pixel data.

4. The method for lighting and driving an LED array based on an AM chip according to claim 2, characterized in that: The light control data corresponding to the target channel is output in the form of pulse width duty cycle, and different moments in the refresh cycle correspond to different target channels in the power-on state, and each refresh cycle has corresponding light control data; The method further comprises: The AM chip obtains the frame rate of the controller, and determines the number of repetitions of the corresponding action switching of the AM chip within one refresh cycle according to the predetermined light control frequency and the frame rate of the controller; The corresponding action switching of the AM chip includes power switching and data switching. The power switching includes power switching between VR power of R channel, VG power of G channel and VB power of B channel. The data switching includes data switching between light control data of R channel, light control data of G channel and light control data of B channel. The type of the power switching matches the type of the data switching.

5. The method for lighting and driving an LED array based on an AM chip according to claim 4, characterized in that: The method further comprises: When it is determined that the light control data corresponding to the LED array in the current refresh cycle has been output, the AM chip determines whether the next refresh cycle is coming; When it is determined that the next refresh cycle has not arrived, the AM chip re-executes the operation of detecting a target channel whose power supply is in the power-on state among the R channel, the G channel and the B channel corresponding to the LED array, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel; When it is determined that the next refresh cycle has arrived, the AM chip re-acquires the light control data corresponding to the LED array from the controller, and re-executes the operation of detecting a target channel whose power supply is in the power-on state among the R channel, G channel and B channel corresponding to the LED array, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

6. The method for lighting and driving an LED array based on an AM chip according to claim 4, characterized in that: The method further comprises: The AM chip determines whether the light control data corresponding to the LED array in the current refresh cycle is completely displayed when the next refresh cycle arrives; When it is determined that it is not fully displayed, the AM chip waits for the light control data corresponding to the LED array to be fully displayed, and after the data corresponding to the LED array is fully displayed, the AM chip re-acquires the light control data corresponding to the LED array from the controller, and re-executes the detection of a target channel among the R channel, G channel and B channel corresponding to the LED array whose power supply is in the power-on state, and outputs the light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs the color light corresponding to the target channel.

7. According to any one of claims 1 to 6, the method for lighting and driving an LED array based on an AM chip, the light control channel of the AM chip corresponds to a fixed current branch and at least one variable current branch, the current of the fixed current branch and the current of all the variable current branches are used to provide corresponding current for the light control channel of the AM chip; the method further comprises: In the process of outputting the light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs the color light corresponding to the target channel, the AM chip determines the corresponding fixed current coefficient for the fixed current branch and determines the corresponding current coefficients for all the variable current branches respectively; In the process of outputting light control data matching the target channel through the light control channel of the AM chip so that the LED array outputs color light corresponding to the target channel, the AM chip adjusts the current of its light control channel according to the fixed current coefficient corresponding to the fixed current branch and the current coefficient corresponding to each of the variable current branches in all the variable current branches.

8. A system for lighting and driving an LED array based on an AM chip, characterized in that: The lighting drive system includes a plurality of AM chips, wherein the LED array is composed of a plurality of LED lamps, each of which has a one-to-one corresponding AM chip, and the R channel, G channel, and B channel of each LED lamp share the light control channel of the AM chip corresponding to the LED lamp, and the R channel corresponding to the LED array shares the VR power supply, the G channel shares the VG power supply, and the B channel shares the VB power supply. For any AM chip, the AM chip includes: A detection module, used for detecting a target channel whose power supply is in a powered-on state among the R channel, the G channel and the B channel corresponding to the LED array; The driving module is used to output light control data matching the target channel through the light control channel of the AM chip, so that the LED array outputs color light corresponding to the target channel.

9. A system for lighting and driving an LED array based on an AM chip, characterized in that: The system comprises: A memory storing executable program code; at least one AM chip and a controller coupled to the memory; Each of the AM chips calls the executable program code stored in the memory to execute the steps corresponding to the AM chip in the method for lighting and driving an LED array based on an AM chip as described in any one of claims 1 to 7; the controller calls the executable program code stored in the memory to execute the steps corresponding to the controller in the method for lighting and driving an LED array based on an AM chip as described in any one of claims 1 to 7.

10. A computer storage medium, characterized in that: The computer storage medium stores computer instructions, and when the computer instructions are called, they are used to execute the method for lighting and driving an LED array based on an AM chip as described in any one of claims 1 to 7.

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