CN212411554U - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN212411554U CN212411554U CN202021517563.5U CN202021517563U CN212411554U CN 212411554 U CN212411554 U CN 212411554U CN 202021517563 U CN202021517563 U CN 202021517563U CN 212411554 U CN212411554 U CN 212411554U
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Abstract
The utility model provides a display panel and a display device, wherein the display panel comprises a first communication interface; the first signal input/output port is connected with the control end of the switch module, is connected with the external equipment when the first communication interface is connected with the external equipment, receives a first control signal sent by the external equipment and outputs the first control signal to the control end of the switch module; the first end and the second end of the switch module are arranged on a first signal line of the first bus and are conducted according to a first control signal; the control module is connected with the first communication interface through the first bus and the second bus, is also connected with the function module through the first bus, receives a data modification instruction sent by external equipment through the first communication interface and the second bus when the switch module is switched on, and sends the data modification instruction to the function module through the first bus; and the functional module modifies the register data according to the data modification instruction. The utility model discloses ensure that the peripheral equipment just modifies functional module's register data when needing, improved display panel's reliability.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a display panel and a display device.
Background
At present, when a Display device has a DDS (Dynamic Display Switching) function, an SOL (Sign of life) function, or other functions, a TCON (central control panel) module of a Display panel in the Display device and a main board need to be connected through an Inter-Integrated Circuit (IIC) bus in the related art.
However, the scheme of connecting the TCON module and the motherboard via the IIC bus in the related art has the following drawbacks: because the TCON module is also connected and communicated with other functional modules in the display panel through the IIC bus, the main board is connected with other functional modules in the display panel through the IIC bus, and for a functional module that receives any command (address command or data command), i.e., modifies register data, when the main board transmits a command to the display panel through the IIC bus, part of the functional modules may erroneously execute the address command transmitted by the main board through the IIC bus to modify the register data, resulting in a situation that the display panel cannot normally display. For example, assuming that the address of the PMIC (Power Management Integrated Circuit) module in the display panel storing the VCOM voltage is 0X4F, if the front-end tool just broadcasts the FF command at the address 0X4F when the system tool is running on the motherboard with DDS function, the PMIC module modifies the stored VCOM voltage value to the maximum value according to the FF command, thereby causing the abnormal picture displayed on the display panel.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the embodiments of the present invention is to provide a display panel and a display device to solve the problem in the related art that the address command transmitted by the IIC bus by the execution main board, in which the functional module may be wrong, modifies the register data in the scheme of connecting the TCON module and the main board through the IIC bus.
In order to solve the above problems, an embodiment of the present invention discloses a display panel, which includes a first communication interface, a first signal input/output port, a switch module, a control module, and a function module, wherein,
the first signal input/output port is connected with the control end of the switch module, and when the first communication interface is connected with an external device, the first signal input/output port is connected with the external device, and is configured to receive a first control signal sent by the external device and output the first control signal to the control end of the switch module;
the first end and the second end of the switch module are arranged on a first signal line of a first bus and are configured to be conducted according to the first control signal;
the control module is connected with the first communication interface through the first bus and the second bus, is also connected with the function module through the first bus, and is configured to receive a data modification instruction sent by the external device through the first communication interface and the second bus and send the data modification instruction to the function module through the first bus under the condition that the switch module is turned on;
the functional module is configured to modify register data in accordance with the data modification instruction.
In order to solve the above problem, the embodiment of the utility model also discloses a display device, including the mainboard and display panel, the mainboard with first communication interface connects among the display panel.
The embodiment of the utility model provides a include following advantage: under the condition that the external device can be connected with the first bus through the first communication interface, and the functional module connected with the first bus can modify register data according to address instruction errors on the first bus, the first end and the second end of the switch module are arranged on the first signal line of the first bus, so that when the external device needs to modify the register data of the functional module, the external device needs to send a first control signal to the first signal input/output port to enable the switch module to be conducted, the external device further sends a data modification instruction to the control module through the first communication interface and the second bus, the control module can modify the register data of the functional module after sending the data modification instruction to the functional module through the first bus, the register data of the functional module can be modified only when the external device needs to be modified, and the register data of the functional module is effectively prevented from being modified at any time according to the address instruction transmitted to the first bus by the external device The situation is changed, and the display reliability of the display panel is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a display panel according to the present invention;
fig. 2 is a schematic structural diagram of another embodiment of a display panel according to the present invention;
fig. 3 is a schematic level diagram of a first terminal and a second terminal of a switch module in an embodiment of a display panel according to the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a display device according to the present invention.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, it shows a schematic structural diagram of an embodiment of a display panel 1 of the present invention, and specifically includes the following modules: the communication device comprises a first communication interface 10, a first signal input/output port GPIO1, a switch module 20, a control module 30 and a function module 40, wherein the first signal input/output port GPIO1 is connected with a control terminal of the switch module 20, and in the case that the first communication interface 10 is connected with an external device, the first signal input/output port GPIO1 is connected with the external device, and is configured to receive a first control signal sent by the external device and output the first control signal to the control terminal of the switch module 20; the first terminal and the second terminal of the switch module 20 are disposed on the first signal line of the first bus 50, and configured to be turned on according to the first control signal; the control module 30 is connected to the first communication interface 10 through the first bus 50 and the second bus 60, the control module 30 is further connected to the function module 40 through the first bus 50, and is configured to receive a data modification instruction sent by an external device through the first communication interface 10 and the second bus 60 and send the data modification instruction to the function module 40 through the first bus 50 when the switch module 20 is turned on; the functional module 40 is configured to modify the register data according to the data modification instruction. Wherein, since the first bus is connected with the first communication interface 10, the first communication interface 10 is connected with the external device, that is, the first bus is connected with the external device through the first communication interface 10.
Specifically, the first communication interface 10 may be any communication interface that can be used for the display panel 1, the switch module 20 may have any structure, and the first signal input/output port GPIO1 may be any suspended signal input/output port in the display panel 1, which is not limited by the present invention.
Specifically, functional module 40 may be a functional module 40 that may modify register data in accordance with an address instruction error on first bus 50. For example, the functional module 40 may be any one of a PMIC module, an LED (light emitting diode) driver module, and an EEPROM (Electrically Erasable Programmable Read only memory). In fig. 1, the functional module 40 is a PMIC module.
Alternatively, the external device may be an external motherboard or an external debugging device such as a lighting engine or the like.
Alternatively, as shown in fig. 1, the control module 30 may be a module with a control function existing in the display panel 1, such as a TCON module or a newly added control module 30.
Alternatively, the Display panel 1 may be an LCM (Liquid Crystal Display Module) Display panel or other Display panels.
Because the first end and the second end of the switch module 20 are disposed on the first signal line of the first bus 50, and the functional module 40 is connected to the first bus 50, when the switch module 20 is disconnected, the first bus 50 cannot work, and the external device cannot send an instruction to the functional module 40 through the first communication interface 10 and the first bus 50, that is, the register data of the functional module 40 cannot be modified by an address instruction or a data modification instruction transmitted by the external device to the first bus 50 through the first communication interface 10; only if the first bus 50 is operable when the switch module 20 is turned on, the external device can send a data modification command to the function module 40 through the first communication interface 10, the second bus 60 and the control module 30 to modify the register data of the function module 40. The embodiment of the utility model provides a can effectively avoid functional module 40's register data to transmit the condition emergence of modifying to first bus 50's address command or data modification instruction according to external equipment at any time, improve display panel 1's demonstration reliability.
Alternatively, as shown in fig. 2, the first signal input/output port GPIO1 may be integrally provided with the first communication interface 10, and the display panel 1 may further include a first resistance unit, a first end of the first resistance unit is connected to the first signal input/output port GPIO1 and the control end of the switch module 20, respectively, and a second end of the first resistance unit is grounded. Since the first communication interface 10 may be integrally provided with the first signal input/output port GPIO1 so that when the first communication interface 10 is connected with an external device, the first signal input/output port GPIO1 is also connected with the external device, the external device may directly transmit the first control signal to the control terminal of the switch module 20 through the first signal input/output port GPIO1 of the first communication interface 10 and transmit the data modification instruction to the first bus 50 through the first communication interface 10 and the control module 30. In addition, the first resistance unit is used as a pull-down resistor of the first signal input/output port GPIO1 and the control terminal of the switch module 20, when the switch module 20 is turned off, the potentials of the first signal input/output port GPIO1 and the control terminal of the switch module 20 are kept at low potentials, so that the situation that the external device affects the level of the first signal input/output port GPIO1 to cause the switch module 20 to be turned on by mistake after the external device is connected to the first communication interface 10 can be effectively avoided. Alternatively, the first resistance unit may be a first resistance R1.
It should be noted that, after the functional module 40 modifies the register data according to the data modification instruction, the external device may send a second control signal to the control terminal of the switch module 20 through the first signal input/output port GPIO1 of the first communication interface 10, and the switch module 20 is turned off according to the second control signal, so that the register data of the functional module 40 cannot be modified.
Alternatively, as shown in fig. 1, the first communication interface 10 may be an eDP (Embedded display port, a full digital interface based on a display interface architecture and protocol) interface, so as to facilitate the display panel 1 to realize high-resolution display.
Optionally, in another embodiment of the present invention, as shown in fig. 2, the first signal input/output port GPIO1 may be integrally provided with the control module 30, the first signal input/output port GPIO1 is connected to the first communication interface 10 through the second bus 60, and the first signal input/output port GPIO1 is configured to receive a first control signal transmitted by an external device through the first communication interface 10 and the second bus 60. Thereby, when the first communication interface 10 is connected with an external device, the first signal input/output port GPIO1 is also connected with the external device. At this time, the external device may transmit the first control signal through the first communication interface 10, the second bus 60 and the first signal input/output port GPIO1, or transmit other commands to the control module 30 through the first communication interface 10, the second bus 60, and the control module 30, and transmit the data modification instruction to the first bus 50 through the first communication interface 10, the second bus 60, and the control module 30. In fig. 2, the control module 30 is an existing TCON module with a control function in the display panel 1, and the first signal input/output port GPIO1 is integrated with the TCON module. In this case, the second bus 60 may be an AUX (Auxiliary) bus.
It should be noted that, after the functional module 40 modifies the register data according to the data modification instruction, the external device may send a second control signal through the first communication interface 10, the second bus 60 and the first signal input/output port GPIO1 of the control module 30, the switch module 20 is turned off according to the second control signal, and the register data of the functional module 40 cannot be modified.
Alternatively, the switch module 20 may include a first switch tube, a first pole of the first switch tube is used as the first terminal of the switch module 20, a second pole of the first switch tube is used as the second terminal of the switch module 20, and a gate of the first switch tube is used as the control terminal of the switch module 20. Alternatively, the first switch tube may be an NMOS tube N1, and in this case, the first control signal is a high-level signal, and the second control signal is a low-level signal. Specifically, if the first signal input/output port GPIO1 is integrally provided with the first communication interface 10, the first control signal may be a 3.3V voltage signal, and if the first signal input/output port GPIO1 is integrally provided with the control module 30, the first control signal may be a 1.8V voltage signal.
Alternatively, as shown in fig. 1 and 2, the first bus 50 may be an IIC bus, and the first signal line may be a clock signal line CLK or a DATA signal line DATA of the IIC bus.
Optionally, the display panel 1 of the embodiment of the present invention may further include: a second resistance unit, a first end of which is connected to the power supply, a voltage VDD of the power supply is equal to an operating voltage of the first bus 50, for example, a voltage of 1.8V, and a second end of which is connected to the first end of the switch module 20; a third resistance unit, a first end of which is connected with the power supply, and a second end of which is connected with the second end of the switch module 20; and a fourth resistance unit, a first end of which is connected to the power supply, and a second end of which is connected to the second signal line of the first bus 50. Therefore, the voltage of the first signal line in the first bus 50 connected to the first end of the switch module 20 is kept stable by the power supply and the second resistance unit, the voltage of the first signal line in the first bus 50 connected to the second end of the switch module 20 is kept stable by the power supply and the third resistance unit, and the voltage of the second signal line is kept stable by the power supply and the fourth resistance unit, so that the voltage of the first bus 50 is ensured not to change in the on and off processes of the switch module 20, and the first bus 50 can normally work. Alternatively, the second resistor unit may be a second resistor R2, the third resistor unit may be a third resistor R3, and the fourth resistor unit may be a fourth resistor R4.
For example, if the external device sends the first control signal to the first signal input/output port GPIO1, and the switch module 20 is the NMOS transistor N1, as shown in fig. 3, when the source level Vdata _ in of the first signal line, e.g., the DATA signal line DATA, input to the NMOS transistor N1 is low, the NMOS transistor N1 is turned on, and the drain level of the NMOS transistor N1 is also low, that is, the level Vdata _ out output from the second end of the switch module 20 to the first signal line is also low; when the source voltage Vdata _ in of the first signal line, such as the DATA signal line DATA, input to the NMOS transistor N1 is at a high level, the NMOS transistor N1 is turned on, and since the drain voltage of the NMOS transistor N1 is pulled up by the power supply and the third resistor unit, the drain voltage of the NMOS transistor N1 is also at a high level, that is, the voltage Vdata _ out output from the second terminal of the switch module 20 to the first signal line is also at a high level, so that the source voltage and the drain voltage of the NMOS transistor N1 are synchronized, the voltage of the first bus 50 is ensured not to change, and the first bus 50 can normally operate.
When the first bus 50 is an IIC bus and the first signal line is a clock signal line CLK or a DATA signal line DATA of the IIC bus, the second signal line is a DATA signal line DATA or a clock signal line CLK of the IIC bus.
Alternatively, if the display panel 1 includes a plurality of functional modules 40 capable of modifying register data according to an address command error on the first bus 50, that is, the number of the functional modules 40 is multiple, for example, the display panel 1 includes a PMIC module, an LED driving module and an EEPROM, the number of the first signal input/output ports GPIO1 and the number of the switch modules 20 in the display panel 1 are also multiple, where the plurality of first signal input/output ports GPIO1 correspond to the plurality of functional modules 40 one to one, the plurality of switch modules 20 correspond to the plurality of functional modules 40 one to one, the plurality of functional modules 40 are connected to the control module 30 through the plurality of first buses 50, and the switch modules 20 corresponding to the functional modules 40 are disposed on the first signal lines or the second signal lines of the first buses 50 corresponding to the functional modules 40. Alternatively, the plurality of first signal input/output ports GPIO1 may each be provided integrally with the first communication interface 10, or may each be provided integrally with the control module 30, or a part of the first signal input/output ports GPIO1 may be provided integrally with the first communication interface 10 and the other first signal input/output ports GPIO1 may be provided integrally with the control module 30. Therefore, the register data of the plurality of functional modules 40 can be prevented from being modified at any time according to the address command transmitted from the external device to the first bus 50, and the display reliability of the display panel 1 is improved.
The utility model discloses display panel 1 includes following advantage: when the external device may be connected to the first bus 50 through the first communication interface 10 (for example, when the display device having the display panel 1 has a DDS function or an SOL function), and the functional module 40 connected to the first bus 50 may modify the register data in error according to the address command on the first bus 50, by setting the first end and the second end of the switch module 20 on the first signal line of the first bus 50, when the external device needs to modify the register data of the functional module 40, the external device needs to send a first control signal to the first signal input/output port GPIO1 to turn on the switch module 20, and then the external device sends a data modification command to the control module 30 (for example, a TCON module) through the first communication interface 10 and the second bus 60, so that the control module 30 can modify the register data of the functional module 40 after sending the data modification command to the functional module 40 through the first bus 50, the register data of the functional module 40 can be modified only when needed by the external device, thereby effectively avoiding the condition that the register data of the functional module 40 is modified at any time according to the address instruction transmitted to the first bus 50 by the external device, and improving the display reliability of the display panel 1.
The embodiment of the utility model provides a still disclose a display device 100, as shown in fig. 4, this display device 100 includes mainboard 2 and foretell display panel 1, and mainboard 2 is connected with first communication interface 10 in the display panel 1. So that the main board 2 can communicate with the display panel 1 through the first communication interface 10.
Optionally, as shown in fig. 1, the first communication interface 10 is integrally disposed with the first signal input/output port GPIO1 in the display panel 1, the first communication interface 10 includes a second signal input/output port GPIO2 connected to the first signal input/output port GPIO1, the second signal input/output port GPIO2 is a corresponding signal input/output port of the motherboard 2, and the second signal input/output port GPIO2 is floating or grounded. At this time, the first signal input/output port GPIO1 is connected to the pull-down resistor, i.e., the first resistor unit, and the second input/output port is suspended or grounded, so that the motherboard 2 cannot control the switch module 20 to be turned on through the first signal input/output port GPIO1, i.e., the motherboard 2 cannot change the register data of the function module 40 through the first bus 50, thereby effectively preventing the switch module 20 from being turned on by mistake due to the influence of the motherboard 2 on the level of the first signal input/output port GPIO 1. Optionally, in a case that the first communication interface 10 is integrated with the first signal input/output port GPIO1 in the display panel 1, and the second input/output port is floating or grounded, if the motherboard 2 needs to modify the register data of the functional module 40, the motherboard 2 may pull up the level of the second input/output port to turn on the switch module 20 corresponding to the functional module 40.
The utility model discloses display device 100 of embodiment includes following advantage: when the motherboard 2 can be connected to the first bus 50 through the first communication interface 10 of the display panel (for example, when the display device 100 has a DDS function or an SOL function), and the functional module 40 connected to the first bus 50 can modify the register data according to the address command error on the first bus 50, by disposing the first end and the second end of the switch module 20 on the first signal line of the first bus 50, when the motherboard 2 needs to modify the register data of the functional module 40, the motherboard 2 needs to send the first control signal to the first signal input/output port GPIO1 to turn on the switch module 20, and then the motherboard 2 sends the data modification command to the control module 30 through the first communication interface 10 and the second bus 60, and the control module 30 can modify the register data of the functional module 40 after sending the data modification command to the functional module 40 through the first bus 50, the register data of the functional module 40 can be modified only when the mainboard 2 needs, the condition that the register data of the functional module 40 is modified at any time according to the address instruction transmitted to the first bus 50 by the mainboard 2 is effectively avoided, and the display reliability of the display panel 1 is improved.
For the embodiment of the display device 100, since it includes the display panel 1 described above, the description is relatively simple, and for the relevant points, reference may be made to partial description of the embodiment of the display panel 1.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The display panel and the display device provided by the present invention are introduced in detail, and the principle and the implementation of the present invention are explained by applying specific examples, and the descriptions of the above examples are only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. A display panel comprises a first communication interface, a first signal input/output port, a switch module, a control module and a function module,
the first signal input/output port is connected with the control end of the switch module, and when the first communication interface is connected with an external device, the first signal input/output port is connected with the external device, and is configured to receive a first control signal sent by the external device and output the first control signal to the control end of the switch module;
the first end and the second end of the switch module are arranged on a first signal line of a first bus and are configured to be conducted according to the first control signal;
the control module is connected with the first communication interface through the first bus and the second bus, is also connected with the function module through the first bus, and is configured to receive a data modification instruction sent by the external device through the first communication interface and the second bus and send the data modification instruction to the function module through the first bus under the condition that the switch module is turned on;
the functional module is configured to modify register data in accordance with the data modification instruction.
2. The display panel according to claim 1, wherein the first signal input/output port is integrated with the first communication interface, the display panel further comprises a first resistor unit, a first end of the first resistor unit is connected to the first signal input/output port and the control end of the switch module, respectively, and a second end of the first resistor unit is grounded.
3. The display panel according to claim 1, wherein the first signal input/output port is integrated with the control module, the first signal input/output port is connected to the first communication interface through the second bus, and the first signal input/output port is configured to receive a first control signal transmitted by the external device through the first communication interface and the second bus.
4. The display panel according to claim 1, wherein the switch module comprises a first switch tube, a first pole of the first switch tube is used as a first terminal of the switch module, a second pole of the first switch tube is used as a second terminal of the switch module, and a gate of the first switch tube is used as a control terminal of the switch module.
5. The display panel according to claim 1, wherein the first bus is an IIC bus, and the first signal line is a clock signal line or a data signal line of the IIC bus.
6. The display panel according to claim 1, further comprising:
a first end of the second resistance unit is connected with a power supply, the voltage of the power supply is equal to the working voltage of the first bus, and a second end of the second resistance unit is connected with the first end of the switch module;
a third resistance unit, a first end of the third resistance unit being connected to the power supply, and a second end of the third resistance unit being connected to the second end of the switch module;
and a first end of the fourth resistance unit is connected with the power supply, and a second end of the fourth resistance unit is connected with the second signal line of the first bus.
7. The display panel according to claim 1, wherein the number of the functional modules, the first signal input/output ports, and the switch modules is plural, a plurality of the first signal input/output ports correspond to a plurality of the functional modules one to one, a plurality of the switch modules correspond to a plurality of the functional modules one to one, a plurality of the functional modules are connected to the control module through a plurality of the first buses, and the switch modules corresponding to the functional modules are disposed on the first signal lines of the first buses corresponding to the functional modules.
8. The display panel of claim 1, wherein the functional module is a PMIC module, an LED driver module, or an EEPROM.
9. A display device comprising a main board and the display panel according to any one of claims 1 to 8, wherein the main board is connected to the first communication interface in the display panel.
10. The display device according to claim 9, wherein the first communication interface is integrated with a first signal input/output port in the display panel, and the first communication interface comprises a second signal input/output port connected to the first signal input/output port, and the second signal input/output port is floating or grounded.
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| CN116312330A (en) * | 2023-05-16 | 2023-06-23 | 合肥联宝信息技术有限公司 | Display control circuit, control method and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116312330A (en) * | 2023-05-16 | 2023-06-23 | 合肥联宝信息技术有限公司 | Display control circuit, control method and electronic equipment |
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