COB display screen common-cathode and common-anode compatible circuit

Abstract

The utility model relates to the field of display screens, and provides a COB display screen common-cathode and common-anode compatible circuit, which comprises a master control module, a common-anode circuit and a common-cathode circuit, the common-anode circuit comprises a common-anode control module, a common-anode switch module and a common-anode light-emitting tube group, the common-anode light-emitting tube group is internally provided with a plurality of common-anode light-emitting diodes, and the common-anode light-emitting diodes are connected with the master control module. The common-cathode circuit comprises a common-cathode control module, a common-cathode switch module and a common-cathode light-emitting tube group, a plurality of common-cathode light-emitting diodes are arranged in the common-cathode light-emitting tube group, cathodes of the plurality of common-cathode light-emitting diodes are respectively grounded through the common-cathode switch module, the common-cathode switch module is controlled by the main control module to be switched on and off, and the common-cathode light-emitting diodes are grounded through the common-cathode switch module. The anodes independently output voltage by the common-cathode control module, and the communication end of the common-cathode control module is connected with the main control module; according to the utility model, the configuration requirement of the common-cathode and common-anode compatible design of the COB display screen can be met.

Description

Technical Field

[0001] The utility model relates to the field of display screens, and in particular to a common cathode and common anode compatible circuit for a COB display screen. Background Art

[0002] At present, COB display screens are divided into traditional common anode circuit solution display products and common cathode circuit solution display products. Common cathode technology is that all LED light-emitting diodes share a common cathode, and the positive poles are powered separately. On the contrary, common anode technology is to connect the anodes of all LED light-emitting diodes together and share a positive pole. The two have different advantages and disadvantages in terms of power supply convenience, energy consumption, and light control, and are suitable for different use environments. Most of the existing display screens only have a single common cathode or common anode circuit, with a single configuration. The traditional circuit solution has been developed for many years and cannot meet the configuration requirements of COB common cathode and common anode compatible designs. Utility Model Content

[0003] The problem solved by the utility model is how to provide a circuit which can meet the configuration requirements of the common cathode and common anode compatible designs of a COB display screen.

[0004] In order to solve the above problems, the utility model provides a common cathode and common anode compatible circuit of a COB display screen, comprising: a main control module, a common anode circuit and a common cathode circuit, the common anode circuit comprising a common anode control module, a common anode switch module and a common anode light-emitting tube group, the common anode light-emitting tube group having a plurality of common anode light-emitting diodes, anodes of the plurality of common anode light-emitting diodes are respectively connected to a common positive power supply through a common anode switch module, the common anode switch module is controlled by the main control module to switch, the cathodes are respectively output voltages by the common anode control module, and the communication end of the common anode control module is connected to the main control module, the common cathode circuit comprising a common cathode control module, a common cathode switch module and a common cathode light-emitting tube group, the common cathode light-emitting tube group having a plurality of common cathode light-emitting diodes, cathodes of the plurality of common cathode light-emitting diodes are respectively grounded through a common cathode switch module, the common cathode switch module is controlled by the main control module to switch, the anodes are respectively output voltages by the common cathode control module, and the communication end of the common cathode control module is connected to the main control module.

[0005] Furthermore, the common anode control module includes a plurality of common anode drive chips, the plurality of common anode drive chips are serially connected, and each of the common anode drive chips is respectively communicatively connected to the main control module.

[0006] Furthermore, the model of the common anode driver chip is FM6565.

[0007] Furthermore, the common anode switch module includes multiple common anode switches, each of which is controlled by the main control module, and the multiple common anode light-emitting diodes in the common anode light-emitting tube group are arranged in a matrix to form a common anode diode matrix. The anodes of the common anode light-emitting diodes in each row of the common anode diode matrix are connected to a common positive power supply through a corresponding common anode switch, and the cathodes of the common anode light-emitting diodes in each column of the common anode diode matrix are connected to a driving output terminal of the common anode driving chip.

[0008] Furthermore, the common cathode control module includes a plurality of common cathode drive chips, the plurality of common cathode drive chips are serially connected, and each of the common cathode drive chips is respectively communicatively connected to the main control module.

[0009] Furthermore, the model of the common cathode driver chip is FM6569.

[0010] Furthermore, the common cathode switch module includes multiple common cathode switches, each of which is controlled by the main control module, and the multiple common cathode light-emitting diodes in the common cathode light-emitting tube group are arranged in a matrix to form a common cathode diode matrix. The cathodes of the common cathode light-emitting diodes in each row of the common cathode diode matrix are grounded through a corresponding common cathode switch, and the anodes of the common cathode light-emitting diodes in each column of the common cathode diode matrix are connected to a driving output terminal of the common cathode driving chip.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The COB display panel of the utility model is provided with a common anode chip and a COB common cathode chip at the same time, and the COB common anode chip and the COB common cathode chip are switched by controlling the main control module. When the common anode is needed, the main control module controls the switch in the common anode switch module to be turned on, and the anodes of the light-emitting tubes in the common anode light-emitting tube group are connected to a common positive power supply. At the same time, the main control module sends a signal to the common anode control module, and each driving pin of the chip in the common anode control module respectively controls the cathodes of the light-emitting tubes in the corresponding common anode light-emitting tube group, thereby realizing the common anode operation. When the common cathode needs to be switched, the signal to the common anode circuit is stopped, the switch in the common anode switch module is turned off, the main control module controls the switch in the common cathode switch module to be turned on, and the cathodes of the light-emitting tubes in the common cathode light-emitting tube group are connected to a common ground. At the same time, the main control module sends a signal to the common cathode control module, and each driving pin of the chip in the common cathode control module respectively sends a corresponding driving voltage to the anodes of the light-emitting tubes in the corresponding common cathode light-emitting tube group, thereby realizing the common anode operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall principle structure of an embodiment of the utility model;

[0014] Figure 2This is a schematic diagram of the principle structure of the common anode circuit of the embodiment of the utility model;

[0015] Figure 3 It is a schematic diagram of the principle structure of the common cathode circuit of an embodiment of the utility model. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment" and "one implementation" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0019] like Figure 1 As shown, the utility model provides a common cathode and common anode compatible circuit of a COB display screen, comprising: a main control module, a common anode circuit and a common cathode circuit, the common anode circuit comprising a common anode control module, a common anode switch module and a common anode light-emitting tube group, the common anode light-emitting tube group having a plurality of common anode light-emitting diodes, anodes of the plurality of common anode light-emitting diodes are respectively connected to a common positive power supply through a common anode switch module, the common anode switch module is controlled to switch by the main control module, the cathodes are respectively output voltages by the common anode control module, the communication end of the common anode control module is connected to the main control module, the common cathode circuit comprises a common cathode control module, a common cathode switch module and a common cathode light-emitting tube group, the common cathode light-emitting tube group having a plurality of common cathode light-emitting diodes, cathodes of the plurality of common cathode light-emitting diodes are respectively grounded through a common cathode switch module, the common cathode switch module is controlled to switch by the main control module, the anodes are respectively output voltages by the common cathode control module, and the communication end of the common cathode control module is connected to the main control module.

[0020] It should be noted that the COB display panel of the utility model is provided with a common anode chip and a COB common cathode chip at the same time, and the COB common anode chip and the COB common cathode chip are switched by the main control module. When the common anode is needed, the main control module controls the switch in the common anode switch module to open, and the anodes of the light-emitting tubes in the common anode light-emitting tube group are connected to the common positive power supply. At the same time, the main control module sends a signal to the common anode control module, and each driving pin of the chip in the common anode control module controls the cathodes of the light-emitting tubes in the corresponding common anode light-emitting tube group respectively, thereby realizing the common anode operation. When the common cathode needs to be switched, the signal to the common anode circuit is stopped, the switch in the common anode switch module is turned off, and the main control module controls the switch in the common cathode switch module to open, and the cathodes of the light-emitting tubes in the common cathode light-emitting tube group are connected to the common ground. At the same time, the main control module sends a signal to the common cathode control module, and each driving pin of the chip in the common cathode control module sends a corresponding driving voltage to the anodes of the light-emitting tubes in the corresponding common cathode light-emitting tube group respectively, thereby realizing the common anode operation.

[0021] In one embodiment of the present invention, Figure 2 As shown, the common anode control module includes a plurality of common anode drive chips, and the plurality of common anode drive chips are serially connected, and each of the common anode drive chips is respectively communicated with the main control module, and the model of the common anode drive chip is FM6565; the common anode switch module includes a plurality of common anode switches, and each of the common anode switches is respectively controlled by the main control module. The plurality of common anode light-emitting diodes in the common anode light-emitting tube group are arranged in a matrix to form a common anode diode matrix, and the anodes of the common anode light-emitting diodes in each row of the common anode diode matrix are connected to a common positive power supply through a corresponding common anode switch, and the cathodes of the common anode light-emitting diodes in each column of the common anode diode matrix are connected to a drive output terminal of the common anode drive chip.

[0022] It should be noted that Figure 2 In the figure, IC1 and IC2 are common anode driver chips, and the corresponding number can be set according to the needs. DCLK, LE, and SWTICH are communication signals between the common anode driver chip and the main control module. Each output drive signal of the common anode driver chip controls the cathode grounding of the common anode light emitting diode respectively. CH1-CH64 are common anode switches, and the specific number can be set according to the number of rows of the matrix. Each common anode switch controls the anode of the common anode light emitting diode in a row to be connected to the common positive power supply. Through row and column control, the on and off control of each light emitting tube is realized, and COB common anode control is realized; the common anode switch in the common anode switch module has various forms. For example, a normally open switch of a relay can be used. The main control module controls the on and off of the relay by outputting a drive signal, and then makes the normally open contact switch to realize the switch control of the corresponding row.

[0023] In one embodiment of the utility model, the common cathode control module includes a plurality of common cathode drive chips, the plurality of common cathode drive chips are serially connected, each of the common cathode drive chips is respectively communicated with the main control module, and the model of the common cathode drive chip is FM6569; the common cathode switch module includes a plurality of common cathode switches, each of the common cathode switches is respectively controlled by the main control module, the plurality of common cathode light-emitting diodes in the common cathode light-emitting tube group are arranged in a matrix to form a common cathode diode matrix, the cathode of each row of the common cathode light-emitting diodes in the common cathode diode matrix is ​​grounded via a corresponding common cathode switch, and the anode of each column of the common cathode light-emitting diodes in the common cathode diode matrix is ​​connected to a drive output terminal of the common cathode drive chip.

[0024] It should be noted that Figure 3 In the figure, IC1N and IC2N are common cathode driver chips, and the corresponding number can be set according to the needs. Each output drive signal of the common cathode driver chip sends a drive voltage to the cathode of the common cathode light emitting diode in the corresponding column. CF1-CFn are common cathode switches. Each common cathode switch controls the cathode of the common cathode light emitting diode in a row to be grounded. Through row and column control, the on and off control of each light emitting tube is realized, realizing COB common cathode control.

[0025] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A COB display screen common cathode and common anode compatible circuit, characterized in that: include: A main control module, a common anode circuit and a common cathode circuit, wherein the common anode circuit includes a common anode control module, a common anode switch module and a common anode light-emitting tube group, wherein the common anode light-emitting tube group has a plurality of common anode light-emitting diodes, and the anodes of the plurality of common anode light-emitting diodes are respectively connected to a common positive power supply through the common anode switch module, the common anode switch module is controlled by the main control module to switch, and the cathodes are respectively output voltages by the common anode control module separately, and the communication end of the common anode control module is connected to the main control module, wherein the common cathode circuit includes a common cathode control module, a common cathode switch module and a common cathode light-emitting tube group, wherein the common cathode light-emitting tube group has a plurality of common cathode light-emitting diodes, and the cathodes of the plurality of common cathode light-emitting diodes are respectively grounded through the common cathode switch module, the common cathode switch module is controlled by the main control module to switch, and the anodes are respectively output voltages by the common cathode control module separately, and the communication end of the common cathode control module is connected to the main control module.

2. The COB display screen common cathode and common anode compatible circuit according to claim 1, characterized in that: The common anode control module includes a plurality of common anode drive chips, the plurality of common anode drive chips are serially connected, and each of the common anode drive chips is respectively communicatively connected to the main control module.

3. The COB display screen common cathode and common anode compatible circuit according to claim 2, characterized in that: The model of the common anode driver chip is FM6565.

4. The COB display screen common cathode and common anode compatible circuit according to claim 3, characterized in that: The common anode switch module includes multiple common anode switches, each of which is controlled by the main control module. The multiple common anode light-emitting diodes in the common anode light-emitting tube group are arranged in a matrix to form a common anode diode matrix. The anodes of the common anode light-emitting diodes in each row of the common anode diode matrix are connected to a common positive power supply through a corresponding common anode switch, and the cathodes of the common anode light-emitting diodes in each column of the common anode diode matrix are connected to a driving output terminal of the common anode driving chip.

5. The COB display screen common cathode and common anode compatible circuit according to claim 1, characterized in that: The common cathode control module includes a plurality of common cathode drive chips, the plurality of common cathode drive chips are serially connected, and each of the common cathode drive chips is respectively communicatively connected to the main control module.

6. The COB display screen common cathode and common anode compatible circuit according to claim 5, characterized in that: The model of the common cathode driver chip is FM6569.

7. The COB display screen common cathode and common anode compatible circuit according to claim 6, characterized in that: The common cathode switch module includes multiple common cathode switches, each of which is controlled by the main control module. The multiple common cathode light-emitting diodes in the common cathode light-emitting tube group are arranged in a matrix to form a common cathode diode matrix. The cathodes of the common cathode light-emitting diodes in each row of the common cathode diode matrix are grounded via a corresponding common cathode switch, and the anodes of the common cathode light-emitting diodes in each column of the common cathode diode matrix are connected to a driving output terminal of the common cathode driving chip.

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