Driving chip, driving circuit and display

Abstract

The utility model discloses a driving chip, a driving circuit and a display, the driving circuit is applied to the driving circuit, the driving circuit comprises at least two driving loops, and each driving loop comprises a plurality of driving chips. The first data ends of the driving chips of the same level in all the driving loops are connected with each other, and the second data ends of the driving chips of the same level in all the driving loops are connected with each other. The driving chip is used for obtaining a target control signal from an input data signal based on a power line carrier signal and generating an output data signal. The data ends of the driving chips of the plurality of driving loops are mutually connected, so that breakpoint resume can be realized under the condition that part of the driving chips have faults. Meanwhile, each driving chip can be independently controlled through a power line carrier signal, so that different driving loops display different lighting effects, and then the display displays corresponding patterns.

Description

Technical Field

[0001] The present application belongs to the field of light emitting technology, and in particular, relates to a driver chip, a driver circuit and a display. Background Art

[0002] The signal transmission schemes currently used by LED (light-emitting diode) screens include single signal line series connection, breakpoint resume transmission, head-to-tail resume transmission, single signal line parallel connection and coding, etc. Since LED screens have many light points and are difficult to repair, the reliability requirements for chips and processing are very high. Among the above-mentioned signal transmission schemes, the reliability of some signal transmission schemes is not good, such as single signal line series connection and first-line resume transmission. Some signal transmission schemes use chips that require at least 5 pins, such as breakpoint resume transmission. The more pins, the more unreliable factors will be introduced. Some signal transmission schemes are complex to process and require the introduction of additional processes, such as the single signal line parallel connection and coding scheme, which requires the introduction of additional coding processes. Utility Model Content

[0003] The purpose of the present application is to provide a driver chip, a driver circuit and a display, aiming to solve the problems of incompatibility reliability and cost existing in traditional display devices.

[0004] A first aspect of an embodiment of the present application provides a driver chip, which is applied to a driver circuit, wherein the driver circuit includes at least two driver circuits, and the driver circuit includes a plurality of driver chips connected in series; the driver chip includes a power supply terminal, a first data terminal, and a second data terminal, the power supply terminal is used to connect to a power bus, the first data terminal is used to connect to a control module or the driver chip of the previous level in the same driver circuit, and the second data terminal of the driver chip is used to connect to the driver chip of the next level in the same driver circuit; the first data terminals of the driver chips of the same level in each of the driver circuits are connected to each other, and the second data terminals of the driver chips of the same level in each of the driver circuits are connected to each other; the power supply terminal is used to receive a power line carrier signal from the power bus, the first data terminal is used to receive an input data signal, and the second data terminal is used to output an output data signal, and the driver chip is used to obtain a target control signal from the input data signal based on the power line carrier signal and generate the output data signal.

[0005] In one embodiment, the driving chip includes a power signal processing module, the power signal processing module is connected to the power end, and the power signal processing module is used to generate a data selection signal based on a power line carrier signal provided by the power bus.

[0006] In one embodiment, the driver chip includes a data processing module, which is respectively connected to the power signal processing module, the first data terminal and the second data terminal. The data processing module is used to obtain a target control signal and generate an output data signal based on the input data signal received by the first data terminal and the data selection signal.

[0007] In one embodiment, the driving chip includes a driving end and a driving module, the driving end is used to connect to the light-emitting unit, the driving module is respectively connected to the data processing module and the driving end, and the driving module is used to adjust the light-emitting parameters of the light-emitting unit based on the target control signal.

[0008] A second aspect of an embodiment of the present application provides a driving circuit, which includes a control module, a power supply module and at least two driving circuits, wherein the driving circuit includes a plurality of driving chips connected in series as described above, the control module is respectively connected to each of the driving circuits, and the control module is used to provide the input data signal to the driving circuit; the power supply module is respectively connected to the power bus and the control module, and the control module is also used to control the power supply module to output the power line carrier signal.

[0009] In one embodiment, the input data signal output by the control module includes multiple control data, and the driving chip is used to obtain the target control signal from one of the multiple control data based on the power line carrier signal, and generate the output data signal based on the remaining control data.

[0010] In one embodiment, the control data includes a plurality of control sub-data, and the driving chip is used to obtain the target control signal from one of the plurality of control sub-data based on the power line carrier signal.

[0011] In one embodiment, the number of the control sub-data in one control data is the same as the number of the driving circuits.

[0012] A third aspect of the embodiments of the present application provides a display, comprising the driving circuit as described above.

[0013] In one embodiment, the driving circuit includes two driving loops, and the display is a single-layer wiring; the first data terminal and the second data terminal in each driving chip of the driving circuit are both pins in the driving chip that are closest to another driving loop.

[0014] Compared with the prior art, the embodiments of the present application have the following beneficial effects: by interconnecting the data terminals of the driver chips at the same level, it is possible to achieve breakpoint continuation when some driver chips fail. At the same time, each driver chip can be independently controlled by the power line carrier signal, so that different driver circuits display different light effects, and thus the display displays corresponding patterns. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a driving circuit provided in one embodiment of the present application;

[0016] Figure 2 Another schematic diagram of the structure of a driving circuit provided in one embodiment of the present application;

[0017] Figure 3 A schematic diagram of the structure of a driver chip provided in one embodiment of the present application;

[0018] Figure 4 A schematic diagram of the structure of a display provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0022] Figure 1 A schematic structural diagram of a driving circuit provided in an embodiment of the present application is shown.

[0023] A driver chip 100 is used for Figure 1 The driving circuit 10 shown includes at least two driving loops 200 , and the driving loop 200 includes a plurality of driving chips 100 connected in series.

[0024] The driver chip 100 includes a power supply terminal, a first data terminal, and a second data terminal. The power supply terminal is used to connect to the power bus VDD, the first data terminal is used to connect to the control module 300 or the previous driver chip 100 in the same driver circuit 200, and the second data terminal of the driver chip 100 is used to connect to the next driver chip 100 in the same driver circuit 200. The first data terminals of the driver chips 100 of the same level in each driver circuit 200 are connected to each other, and the second data terminals of the driver chips 100 of the same level in each driver circuit 200 are connected to each other.

[0025] The power supply terminal is used to receive a power line carrier signal from a power bus VDD, the first data terminal is used to receive an input data signal, the second data terminal is used to output an output data signal, and the driver chip 100 is used to obtain a target control signal from the input data signal based on the power line carrier signal and generate an output data signal.

[0026] It can be understood that the series-connected driver chips 100 refer to multiple driver chips 100 in the same driver circuit 200, which are sequentially connected in series through the first data terminal and the second data terminal, and each driver chip 100 is divided into a first-level driver chip 100, a second-level driver chip 100, a third-level driver chip 100, and the Nth-level driver chip 100 according to the arrangement order of the driver chips 100 starting from the control module 300. Exemplarily, taking the second-level driver chip 100 as an example, the first-level driver chip 100 is the upper level of the second-level driver chip 100, and the third-level driver chip 100 is the lower level of the second-level driver chip 100, and the second-level driver chips 100 in each driver circuit 200 are the same-level driver chips 100. The first-level driver chip 100 is the driver chip 100 directly connected to the control module 300. When the output data signal output by the driver chip 100 enters the next-level driver chip 100, it is the input data signal of the next-level driver chip 100.

[0027] By interconnecting the first data terminals of the driver chips 100 at the same level of the plurality of drive circuits 200, the input signals of the driver chips 100 at the same level are all the same. By interconnecting the second data terminals of the driver chips 100 at the same level of the plurality of drive circuits 200, the output signals of the driver chips 100 at the same level are all the same. If a failure occurs in one of the driver chips 100, resulting in the failure of the driver chip 100 to transmit the output data signal to the driver chip 100 at the next level, the driver chips 100 at the same level of the other drive circuits 200 can provide the input data signal to the driver chip 100 at the next level of the failed driver chip 100, which will not affect the operation of the remaining driver chips 100 of the drive circuit 200, thereby achieving the effect of breakpoint resumption when some driver chips 100 fail.

[0028] It should be noted that, for a conventional circuit, assuming that the data terminals of the driver chips 100 at the same level are connected to each other, the signals received by each driver chip 100 at the same level are the same, and the light effects of the light-emitting units corresponding to each driver chip 100 at the same level of the conventional circuit are the same, resulting in different driver circuits 200 displaying the same light effects. However, in this embodiment, each driver chip 100 can be independently controlled through a power line carrier signal, so that different driver circuits 200 display different light effects, thereby causing the display to display corresponding patterns.

[0029] In one embodiment, if Figure 2 As shown, the driver chip 100 includes a power signal processing module 210 , which is connected to the power terminal and used to generate a data selection signal based on a power line carrier signal provided by a power bus VDD.

[0030] It should be noted that the power bus VDD can transmit a power line carrier signal while transmitting the industrial frequency current, and the power signal processing module 210 can demodulate the power line carrier signal to obtain the data selection signal from the power line carrier signal.

[0031] In one embodiment, if Figure 2 As shown, the driver chip 100 includes a data processing module 220, which is respectively connected to the power signal processing module 210, the first data terminal and the second data terminal. The data processing module 220 is used to obtain a target control signal and generate an output data signal based on an input data signal received at the first data terminal and a data selection signal.

[0032] It can be understood that when the received input data signal contains data required by the driver chip 100, the data processing module 220 can determine which part of the data in the input data signal is needed through the data selection signal, and then obtain the required target control signal from the input data signal, and generate an output data signal based on the part of the input data signal except the target control signal.

[0033] When the data processing module 220 determines through the data selection signal that the input data signal does not contain the data required by the driver chip 100 , the data processing module 220 may generate a corresponding output data signal based on all received input data signals.

[0034] In one embodiment, if Figure 2 As shown, the driver chip 100 includes a driver end and a driver module 230, the driver end is used to connect to the light-emitting unit 500, the driver module 230 is respectively connected to the data processing module 220 and the driver end, and the driver module 230 is used to adjust the light-emitting parameters of the light-emitting unit 500 based on the target control signal.

[0035] The driving module 230 can provide a driving current to the light emitting unit 500 according to the target control signal to adjust the light emitting parameters of the light emitting unit 500. For example, the driving module 230 can adjust the light emitting parameters such as brightness and color of the light emitting unit 500. In some embodiments, the light emitting unit 500 includes one or more LED lamps.

[0036] In some embodiments, the driver chip 100 further includes a clock module, and the clock module is used to provide a clock signal.

[0037] It is understandable that when the driving chip 100 is not provided with a clock module, an external clock terminal needs to be provided to receive a clock signal.

[0038] In some embodiments, the driver chip 100 further includes a reference current module, which is connected to the power signal processing module 210 and the driver module 230 respectively, and is used to provide a reference voltage to the driver module 230.

[0039] It is understandable that when the driver chip 100 is not provided with a reference current module, an external voltage terminal needs to be provided to access the reference voltage.

[0040] In one embodiment, if Figure 3 As shown, the driving circuit 10 further includes a control module 300 and a power module 400. The control module 300 is respectively connected to each driving circuit 200, and the control module 300 is used to provide an input data signal to the driving circuit 200. The power module 400 is respectively connected to the power bus VDD and the control module 300, and the control module 300 is also used to control the power module 400 to output a power line carrier signal.

[0041] It can be understood that when it is necessary to control the change of the light effect of the light-emitting unit 500 corresponding to the driver chip 100, the control module 300 can provide an input data signal to the first-level driver chip 100, and output the corresponding power line carrier signal by controlling the power supply module 400, so that the corresponding driver chip 100 obtains the target control signal from the input data signal, thereby changing the light effect of the corresponding light-emitting unit 500.

[0042] In some embodiments, the light emitting unit 500 may be packaged on the driving chip 100 .

[0043] In some embodiments, the control module 300 may be a control circuit or device such as a single chip microcomputer, a chip, a programmable logic controller, or a logic circuit.

[0044] In one embodiment, the input data signal output by the control module 300 includes multiple control data, and the driver chip 100 is used to obtain a target control signal from one of the multiple control data based on the power line carrier signal, and generate an output data signal based on the remaining control data.

[0045] It can be understood that one control data corresponds to one driver chip 100. When the control module 300 controls one of the drive circuits 200, the control module 300 can instruct each driver chip 100 on the drive circuit 200 to obtain the target control signal according to the corresponding control data through the power line carrier signal. At the same time, the control module 300 can instruct the driver chips 100 in other drive circuits 200 through the power line carrier signal so that each driver chip 100 at the same level outputs the same output data signal, but the driver chips 100 in other drive circuits 200 do not obtain the target control signal from the control data. Since each driver chip can be independently controlled by the power line carrier signal, the specific number of control data in the input data signal can be configured according to the number of driver chips to be controlled. Specifically, the control module 300 can first determine which driver chips 100 need to change the corresponding light effect, and then generate a corresponding number of control data according to the determined number of driver chips 100, and then generate and output the corresponding input data signal.

[0046] For example, if only three of the driver chips 100 need to be controlled, the control module 300 can instruct the corresponding driver chip 100 to read the control data through the power line carrier signal, and output an input data signal including three control data. After receiving the input data signal, the driver chip 100 that receives the corresponding power line carrier signal can obtain the target control signal from the control data and generate an output data signal based on the remaining control data. The remaining driver chips 100 that do not receive the corresponding power line carrier signal directly generate output data signals based on the received input data signals.

[0047] In one embodiment, the control data includes a plurality of control sub-data, and the driving chip 100 is used to obtain a target control signal from one of the plurality of control sub-data based on the power line carrier signal.

[0048] It can be understood that one control sub-data corresponds to one driver chip 100. When the control module 300 controls one of the drive circuits 200, the control module 300 can instruct each driver chip 100 on the drive circuit 200 to obtain a target control signal according to the corresponding control data through a power line carrier signal.

[0049] In one embodiment, the number of control data in the input data signal output by the control module 300 is equal to the number of driving chips 100 in the driving circuit 200 , and the number of control sub-data in one control data is the same as the number of driving circuits 200 .

[0050] It can be understood that each control sub-data in a control data corresponds to each driver chip 100 at one level. After each driver chip 100 obtains the target control signal from the corresponding control sub-data, the driver chip 100 will remove the control data to which the control sub-data belongs, and generate an output data signal based on the remaining control data, thereby ensuring that the output data signals output by the driver chips 100 at the same level are the same.

[0051] Figure 4 A schematic diagram of the structure of a display provided by an embodiment of the present application is shown. For the sake of convenience, only the parts related to the present embodiment are shown, which are described in detail as follows:

[0052] The display 20 includes a driving circuit 10 as in any of the above embodiments. When the driving circuit 10 includes multiple driving circuits 200 , the display 20 can connect each driving chip 100 using multi-layer wiring, and the number of wiring layers is positively correlated with the number of driving circuits 200 .

[0053] The display 20 may be an LED transparent display.

[0054] In one embodiment, the driving circuit 10 includes two driving loops 200, and the display 20 is a single-layer wiring. The first data terminal and the second data terminal in each driving chip 100 of the driving circuit 10 are the pins in the driving chip 100 that are closest to another driving loop 200.

[0055] It is understandable that since the first data terminal and the second data terminal of the driver chip 100 need to be connected to the first data terminal and the second data terminal of the driver chip 100 of another driving circuit 200, circuit crossing can be avoided by configuring the pin positions of the first data terminal and the second data terminal.

[0056] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0057] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A driver chip, characterized in that: Applied to a driving circuit, the driving circuit comprises at least two driving circuits, and the driving circuit comprises a plurality of driving chips connected in series; The driver chip comprises a power supply terminal, a first data terminal and a second data terminal, the power supply terminal is used to connect to a power bus, the first data terminal is used to connect to a control module or the driver chip of the previous level in the same driver circuit, and the second data terminal of the driver chip is used to connect to the driver chip of the next level in the same driver circuit; The first data terminals of the driving chips at the same level in each of the driving circuits are connected to each other, and the second data terminals of the driving chips at the same level in each of the driving circuits are connected to each other; The power supply end is used to receive a power line carrier signal from the power bus, the first data end is used to receive an input data signal, the second data end is used to output an output data signal, and the driver chip is used to obtain a target control signal from the input data signal based on the power line carrier signal and generate the output data signal.

2. The driver chip according to claim 1, characterized in that: The driving chip comprises a power signal processing module, the power signal processing module is connected to the power terminal, and the power signal processing module is used to generate a data selection signal based on a power line carrier signal provided by the power bus.

3. The driver chip according to claim 2, characterized in that: The driving chip includes a data processing module, which is respectively connected to the power signal processing module, the first data terminal and the second data terminal. The data processing module is used to obtain a target control signal and generate an output data signal based on the input data signal received by the first data terminal and the data selection signal.

4. The driver chip according to claim 3, characterized in that: The driving chip includes a driving end and a driving module, the driving end is used to connect to the light-emitting unit, the driving module is respectively connected to the data processing module and the driving end, and the driving module is used to adjust the light-emitting parameters of the light-emitting unit based on the target control signal.

5. A driving circuit, characterized in that: The driving circuit comprises a control module, a power module and at least two driving circuits, wherein the driving circuit comprises a plurality of driving chips according to any one of claims 1 to 4 connected in series, the control module is connected to each of the driving circuits respectively, and the control module is used to provide the input data signal to the driving circuits; The power supply module is connected to the power bus and the control module respectively, and the control module is further used to control the power supply module to output the power line carrier signal.

6. The driving circuit according to claim 5, characterized in that: The input data signal output by the control module includes multiple control data, and the driving chip is used to obtain the target control signal from one of the multiple control data based on the power line carrier signal, and generate the output data signal based on the remaining control data.

7. The driving circuit according to claim 6, characterized in that: The control data includes a plurality of control sub-data, and the driving chip is used to obtain the target control signal from one of the plurality of control sub-data based on the power line carrier signal.

8. The driving circuit according to claim 7, characterized in that: The number of the control sub-data in one control data is the same as the number of the driving circuits.

9. A display, characterized in that: Comprising a driving circuit as described in any one of claims 5-8.

10. The display according to claim 9, characterized in that The driving circuit comprises two driving loops in total, and the display is a single-layer wiring; The first data terminal and the second data terminal in each driving chip of the driving circuit are both pins in the driving chip that are closest to another driving circuit.

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